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WO2013168377A1 - Structure de guide d'onde ayant une caractéristique ebg - Google Patents

Structure de guide d'onde ayant une caractéristique ebg Download PDF

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Publication number
WO2013168377A1
WO2013168377A1 PCT/JP2013/002716 JP2013002716W WO2013168377A1 WO 2013168377 A1 WO2013168377 A1 WO 2013168377A1 JP 2013002716 W JP2013002716 W JP 2013002716W WO 2013168377 A1 WO2013168377 A1 WO 2013168377A1
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WO
WIPO (PCT)
Prior art keywords
conductor
split ring
waveguide structure
resonator
connection portion
Prior art date
Application number
PCT/JP2013/002716
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English (en)
Japanese (ja)
Inventor
嘉晃 笠原
博 鳥屋尾
Original Assignee
日本電気株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本電気株式会社 filed Critical 日本電気株式会社
Priority to JP2014514371A priority Critical patent/JP6176242B2/ja
Publication of WO2013168377A1 publication Critical patent/WO2013168377A1/fr

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0213—Electrical arrangements not otherwise provided for
    • H05K1/0216—Reduction of cross-talk, noise or electromagnetic interference
    • H05K1/0236—Electromagnetic band-gap structures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/2005—Electromagnetic photonic bandgaps [EPB], or photonic bandgaps [PBG]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
    • H01Q15/006—Selective devices having photonic band gap materials or materials of which the material properties are frequency dependent, e.g. perforated substrates, high-impedance surfaces
    • H01Q15/008—Selective devices having photonic band gap materials or materials of which the material properties are frequency dependent, e.g. perforated substrates, high-impedance surfaces said selective devices having Sievenpipers' mushroom elements

Definitions

  • the present invention relates to a waveguide structure, and more particularly to a waveguide structure having an electromagnetic band gap (EBG) characteristic for suppressing electromagnetic noise propagating in a printed circuit board.
  • ESG electromagnetic band gap
  • a magnetic field is induced by a current flowing into a circuit at the time of switching of a digital circuit, or an electric field is induced by a voltage fluctuation generated at the time of switching, thereby generating an electromagnetic wave.
  • This electromagnetic noise causes problems such as destabilizing the operation of other circuits and degrading the wireless performance of the device. That is, by establishing a technique for suppressing this electromagnetic noise, the stability of the circuit and the wireless performance of the device can be improved.
  • the background technique has the following problems.
  • the method using a decoupling capacitor it is difficult to make the self-resonance frequency as high as several GHz due to the inevitable parasitic inductance of the capacitor. Therefore, the method using the decoupling capacitor is usually applicable only to the frequency band up to about 1 GHz. That is, it cannot cope with a high frequency band such as that used in wireless communication in recent years, for example, the 2.4 GHz band.
  • the technique for avoiding the creation of a large island-shaped conductor plane is based on the principle that an unintended resonance frequency is pressed to the high frequency side by reducing the conductor plane.
  • conductor planes with the same potential need to be connected in a DC (direct current) manner. If the connecting portion is made too thin, the self-inductance of the connecting portion increases, and the voltage drop at the time of current inflow during switching cannot be ignored. Therefore, there is a practical limit to reducing the conductor plane.
  • Patent Document 1 There is a technique listed in Patent Document 1 as a technique for solving the problems of the background art.
  • the structure described in Patent Document 1 is a structure having an EBG (Electromagnetic Bandgap) characteristic, and is intended to suppress propagation of electromagnetic noise between power planes.
  • 36A is a perspective view showing a structure having an EBG characteristic proposed in Patent Document 1
  • FIG. 36B is a sectional view of the structure having the EBG characteristic
  • FIG. 36B is an equivalent circuit of the structure having the EBG characteristic.
  • an equivalent circuit of this structure has a configuration in which a parallel plate waveguide composed of two power supply planes is shunted by a series resonance portion composed of a capacitance C of a conductor patch and an inductance L of a conductor rod.
  • a series resonance portion composed of a capacitance C of a conductor patch and an inductance L of a conductor rod.
  • Patent Document 2 there is a technique cited in Patent Document 2 as another form of a structure having another EBG characteristic that solves the problems of the background art. Since the structure described in Patent Document 2 is a modified example of the structure described as the background art in Patent Document 3, the principle is simply described with reference to FIGS. 38A and 38B which are the drawings described in Patent Document 3. To do. As shown in FIG. 38A, the waveguide structure described as the background art in Patent Document 3 is a structure in which conductor planes are divided by slits, and each conductor patch formed by being divided by the slits is connected by a thin connection portion. ing. As shown in FIG. 38B, the equivalent circuit diagram of this structure is shown in FIG. The parallel resonant circuit is added as a series branch.
  • a series branch portion (a portion formed by an inductance Lp of a parallel plate waveguide, a capacitance Cg of a slit portion, and an inductance Lb of a connection portion connecting the slit portions) behaves as a capacitance.
  • the electromagnetic noise suppression effect can be achieved even in a high frequency such as the GHz band, which has been difficult to achieve with the method using the decoupling capacitor described in the background art.
  • Patent Document 2 is a structure in which the connecting portion for connecting the slit portion described as the background art in Patent Document 3 is realized by using a layer different from the conductor plane provided with the slit.
  • a cross-sectional view of the waveguide structure described in Patent Document 2 is shown in FIG.
  • the metal plates 304 and 305 are connected using the first via 301, the second via 302, and the connection pattern 303.
  • the first via 301, the second via 302, and the connection pattern 303 correspond to the thin connection portion of the background art of Patent Document 3
  • the metal plates 304 and 305 correspond to the conductor plane divided by the slit of the background technology of Patent Document 3. is doing.
  • the thin connection portion of the background art of Patent Document 3 is formed using a layer different from the conductor plane (in Patent Document 2, the metal plates 304 and 305) by using vias.
  • the equivalent circuit is the same as the structure described in the background art of Patent Document 3, and an electromagnetic noise suppression effect can be expected based on the same principle as the structure described in the background art of Patent Document 3.
  • Patent Document 1 the problem of Patent Document 1 will be described.
  • the problem is that the area of the structure for realizing the EBG characteristics in a desired frequency band occupies a large area.
  • the area of one conductor patch 106 occupies 200 mm ⁇ 200 mm in plan view.
  • the conductor patch is simply made smaller, the capacitance value between the conductor patch and the conductor plane is reduced, and the frequency band having the EBG characteristic is increased in frequency, so that the desired frequency band is deviated.
  • the decrease in capacitance must be compensated by increasing the inductance of the conductor rod.
  • a prescription such as reducing the diameter of the rod or increasing the length of the rod is necessary.
  • the former has a limit due to manufacturable conditions, and the latter is not practically desirable because the layer spacing of the substrate is limited by the structure having EBG characteristics. That is, it is possible in principle to reduce the area in plan view, but in that case, a new problem arises.
  • the problem of the background art of Patent Document 2 and Patent Document 3 is that the conductor plane divided by the slit is connected by a thin connection portion, so that the inductance value of the corresponding portion becomes large and causes a voltage drop.
  • the waveguide structure having the EBG characteristic described in the background art of Patent Document 2 and Patent Document 3 is assumed to be used for a power plane as understood from the fact that the divided conductor patches are connected in a DC manner. .
  • the present invention takes into consideration the above-mentioned problems and does not cause a voltage drop. Therefore, the present invention provides a waveguide structure having an EBG characteristic that can be mounted in a small area when viewed in a plan view without a large work on the conductor plane. The purpose is to provide.
  • a waveguide structure having EBG characteristics includes a substrate, first and second conductor planes provided on the substrate so as to be substantially parallel to each other, and a split ring.
  • the split ring resonator has an annular portion and at least one pair of open end pairs in which the annular portion is interrupted, and constitutes the one set of open end pairs. At least a part of the annular portion of the split ring resonator in a region sandwiched between the first and second conductor planes.
  • the annular portion is provided in a direction that is not substantially parallel to the main surface of the second conductor plane.
  • the present invention can provide a waveguide structure having EBG characteristics that can be mounted in a small area.
  • FIG. 25 is a sectional view taken along line VV in FIG. 24. It is sectional drawing along the VI-VI line of FIG. It is a graph for demonstrating the effect of the waveguide structure of 7th Embodiment of this invention. It is a top view for demonstrating the waveguide structure of 8th Embodiment of this invention. It is sectional drawing along the VII-VII line of FIG. It is sectional drawing along the VIII-VIII line of FIG. It is a top view for demonstrating the other example of the waveguide structure of 8th Embodiment of this invention.
  • FIG. 32 is a cross-sectional view taken along line IX-IX in FIG. 31.
  • FIG. 32 is a cross-sectional view taken along line XX in FIG. 31.
  • It is a top view for demonstrating the other example of the waveguide structure of embodiment of this invention.
  • It is a top view for demonstrating the other example of the waveguide structure of embodiment of this invention.
  • It is sectional drawing of the waveguide structure for demonstrating another example of the waveguide structure of 2nd Embodiment of this invention.
  • It is a perspective view for demonstrating the structure which has the EBG characteristic proposed by patent document 1.
  • FIG. FIG. 36B is a cross-sectional view of the structure having the EBG characteristic of FIG. 36A.
  • FIG. 36B is an equivalent circuit diagram of the structure having the EBG characteristic of FIG. 36A. It is sectional drawing of the structure which has the EBG characteristic proposed by patent document 2.
  • FIG. FIG. 11 is a plan view of a structure having EBG characteristics described in the background art of Patent Document 3.
  • FIG. 38B is an equivalent circuit diagram of the structure having the EBG characteristic of FIG. 38A.
  • the electromagnetic wave noise to be a problem is an electromagnetic wave propagating between parallel plate conductor planes.
  • a split ring resonator is arranged in a parallel plate waveguide composed of a plurality of conductor planes so that the magnetic field component of the electromagnetic wave propagating in the parallel plate waveguide penetrates the ring.
  • the split ring resonator has an annular portion and at least one open end pair in which the annular portion is interrupted, and each open end constituting the open end pair is adjacent to form a capacitance. Yes. That is, the split ring-shaped resonator constitutes an LC resonator by having at least one open end pair of the annular portion behave as capacitance and the other annular portion behave as inductance.
  • the parallel plate waveguide is described by an inductance which is a series impedance part and a capacitance which is a parallel admittance part.
  • a structure in which a split ring-shaped LC resonator is coupled to the parallel plate waveguide by a magnetic field is an equivalent circuit of the present invention.
  • This equivalent circuit model can be expressed more simply as an equivalent circuit model in which a parallel LC resonator is added as a series impedance to the equivalent circuit model of the parallel plate waveguide. At this time, the coupling between the parallel plate line and the split ring LC resonator due to the magnetic field is pushed into the values of the inductance L and the capacitance C of the simplified parallel LC resonator.
  • the amplitude of the electromagnetic wave propagating in such an equivalent circuit attenuates as it progresses in a frequency band in which the series impedance portion is capacitive. That is, it has an EBG characteristic in such a frequency band.
  • the electromagnetic wave which propagates between the parallel plate conductor planes as a problem can be suppressed by arranging the split ring resonator.
  • the present invention can provide a waveguide structure having EBG characteristics.
  • the area of the conductor patch directly affects the capacitance value because the mushroom type structure must form a capacitance with the conductor plane.
  • prescriptions such as reducing the diameter of the rod and increasing the length of the rod are necessary, and considering that these are difficult in practice, the inductance value is It is difficult to use as a design parameter, and the size of the conductor patch and the frequency band with the EBG characteristic correspond one-to-one (however, the distance between the conductor patch and the conductor plane and the relative dielectric constant of the material are fixed). if you did this).
  • each open end constituting one open end pair of the split ring resonator is close to form a capacitance.
  • a capacitance is not formed between the conductor plane and the capacitance forming method has a great degree of freedom, and the capacitance value is not necessarily divided in a plan view. There is no one-to-one correspondence with the area occupied by the resonators.
  • the entire annular portion behaves as an inductance.
  • clearance holes openings, slits, cutouts, etc.
  • split ring resonators using such clearance holes, slits, cutouts, etc.
  • FIG. 1 is a plan view showing a waveguide structure according to a first embodiment of the present invention.
  • FIG. 2 is a sectional view taken along line II in FIG.
  • FIG. 3 is a cross-sectional view taken along the line II in FIG. 1, showing another example of the waveguide structure according to the first embodiment of the present invention.
  • FIG. 4 is a cross-sectional view taken along line II of FIG. 1, showing still another example of the waveguide structure according to the first embodiment of the present invention.
  • FIG. 5 is a plan view of a printed circuit board in which a plurality of the split ring resonators of FIG. 1 are arranged.
  • FIGS. 1 to 4 show the periphery of a region where one of the split ring resonators is arranged
  • FIG. 5 shows a state in which a plurality of the split ring resonators are arranged on a printed circuit board. Yes.
  • the x, y, and z axes will be defined and described.
  • the waveguide structure having the EBG characteristic includes the first conductor plane 102 and the second conductor provided on the surface layer or the inner layer of the printed circuit board 101 so as to be substantially parallel to the printed circuit board 101.
  • a plane 103 and a split ring-shaped resonator 110 provided on the printed circuit board 101 are provided.
  • the split ring-shaped resonator 110 is configured in a range surrounded by a rectangular dotted line.
  • the split ring resonator 110 of the present embodiment is an annular portion of the split ring resonator. Are arranged so as to be included in the first region 104.
  • the first region 104 is not only the region sandwiched between the first conductor plane 102 and the second conductor plane 103 facing each other, but also the first conductor plane 102 and the second conductor plane 103. It also includes the existing in-plane region.
  • the split ring resonator is rectangular.
  • the split ring resonator includes a first conductor via 105 and a second conductor via 106 provided at different positions in plan view, and a first conductor via 105 and a second conductor via 106.
  • One end is connected to the first conductor via 105 and the other end extends to the second conductor via 106 provided above or below the first connection portion 107 and the first connection portion 107.
  • the second connection portion 108 a and the second connection portion 108 b having one end connected to the second conductor via 106 and the other end extending to the first conductor via 105.
  • the first conductor via 105 and the second conductor via 106 are electrically connected to the first conductor plane 102 and the second conductor plane 103.
  • a plurality of clearance holes are formed in the first conductor plane 102 and the second conductor plane 103 so as to pass without being connected.
  • the planar shape of the clearance hole may be a quadrangular shape as shown in FIG. 1, a circular shape or an elliptical shape.
  • a gap 109 is formed between the other ends of the second connecting portion 108a and the second connecting portion 108b, and the other ends are capacitively connected.
  • the first connection portion 107, the second connection portion 108a, and the second connection portion 108b are configured by a surface layer or inner layer wiring of the printed circuit board 101, or a conductor via and a surface layer or inner layer wiring that connect wirings between different layers. It is thought that it is done.
  • FIG. 2 shows a case where the first connecting portion 107, the second connecting portion 108a, and the second connecting portion 108b are configured by wiring on the inner layer of the printed circuit board 101.
  • the split ring-shaped resonator 110 provided on the printed circuit board 101 is surrounded by the rectangular dotted lines in FIG. 2, that is, the first conductor via 105, the second conductor via 105, and the second conductor via 105.
  • the conductor via 106, the first connecting portion 107, the second connecting portion 108a, and the second connecting portion 108b are configured.
  • FIG. 3 shows a case where the split ring resonator 110 is configured by the first conductor via 105 and the second conductor via 106, the conductor via connecting the above-described wiring between different layers, and the wiring on the surface layer or the inner layer. Show. In a region outside the first region 104, a first connecting portion 107a having one end connected to the first conductor via 105, and a first connecting portion 107b having one end connected to the second conductor via 106, Is formed. The first connection portion 107a and the first connection portion 107b are arranged in different layers, and the other end portions overlap each other in a plan view in a region outside the first region 104, so that a gap portion is formed. 109 is formed.
  • a second connection portion 108 a having one end connected to the first conductor via 105 is disposed in the first region 104.
  • a second connection portion 108b having one end connected to the second conductor via 106 is disposed in a region outside the first region 104.
  • the other end of the second connection portion 108b is capacitively coupled to one end of the second connection portion 108c arranged in the same layer via the gap portion 109.
  • the second connection portion 108 c and the second connection portion 108 a are connected by a conductor via that passes through a clearance hole provided in the second conductor plane 103.
  • the split ring-shaped resonator 110 provided on the printed circuit board 101 is surrounded by the square dotted lines in FIG. 3, that is, the first conductor via 105, the second conductor via 105, and the second conductor via 105.
  • the split ring-shaped resonator is rectangular, but any other polygonal shape does not affect the essential effect of the present invention. For example, an octagonal shape as shown in FIG. 3 may be used, or a completely different shape may be used.
  • FIG. 4 is a modified example of FIG. 2, and shows a case where the second connection portion 108a and the second connection portion 108b are arranged in different layers. That is, the printed circuit board 101 is provided with a first connection portion 107 that connects the first conductor via 105 and the second conductor via 106 in the first region 104. Further, in the first region 104, a second connection part 108a having one end connected to the first conductor via 105 and a second connection part 108b having one end connected to the second conductor via 106 are provided. Is formed. The second connection portion 108a and the second connection portion 108b are arranged in different layers, and the other end portions thereof are overlapped with each other in plan view to form a gap portion 109.
  • the split ring-shaped resonator 110 includes a first conductor via 105 and a second conductor via 106, and further electrically connects the first conductor via 105 and the second conductor via 106. Or a plurality of connecting portions that are capacitively connected through the gap 109 to form a split ring resonator.
  • the gap portion 109 may be formed by providing a slit so as to divide the wiring, or between the first connection portion 107a and the first connection portion 107b in FIG. 3 or the second connection in FIG. It may be created by having a portion where wirings arranged in different layers overlap each other in plan view, such as between the portion 108a and the second connection portion 108b.
  • the waveguide structure having EBG characteristics shown in FIGS. 2 and 3 is configured by arranging one or a plurality of split ring resonators one-dimensionally or two-dimensionally. A case where a plurality of split ring resonators of the present embodiment are two-dimensionally arranged will be described with reference to FIG.
  • the waveguide structure of the present embodiment is assumed to be used for suppressing electromagnetic wave noise propagating between power planes. That is, it is assumed that the printed circuit board 101 includes an electronic device 111 such as an integrated circuit (IC) or a large-scale integrated circuit (LSI) that becomes a noise source.
  • FIG. 5 shows a plurality of two-dimensionally arranged split ring resonators having a waveguide structure having EBG characteristics as shown in FIGS.
  • the split ring resonators disposed at this time do not have to have the same shape. That is, even if split ring resonators having various shapes are mixed and arranged, the essential effect of the present invention is not affected.
  • FIG. 6 shows an equivalent circuit diagram of the waveguide structure of the present embodiment.
  • the first conductor plane 102 and the second conductor plane 103 provided on the printed circuit board 101 form a parallel plate waveguide.
  • the capacitively connected gap portion 109 existing in the split ring resonator acts as a capacitance
  • other components of the split ring resonator act as an inductance, thereby functioning as an LC resonance circuit.
  • the LC resonant circuit is coupled to the parallel plate flat plate waveguide via a magnetic field, which is an equivalent circuit diagram of this embodiment. That is, the equivalent circuit diagram of this embodiment is described as shown in FIG. When the equivalent circuit diagram of FIG.
  • the equivalent circuit diagram of FIG. 6 becomes a simpler equivalent circuit as shown in FIG. Can be expressed as That is, the L ′ SRR and the C ′ SRR in FIG. 7 represent amounts different from the C SRR from the L SRR in FIG. 6.
  • the propagation of the electric field component of the electromagnetic wave of the one-dimensional transmission line model described by the equivalent circuit of FIG. 8 is expressed by the following equation (1) except for the time-dependent factor with the traveling direction of the electromagnetic wave as the x-axis direction. .
  • E Electric field component of electromagnetic wave of one-dimensional transmission line
  • E 0 Amplitude of electric field component of electromagnetic wave of one-dimensional transmission line
  • ⁇ Propagation constant in one-dimensional transmission line.
  • j imaginary unit ⁇ : angular frequency
  • Z TL series impedance of one-dimensional transmission line
  • Y TL parallel admittance
  • L PPW of one-dimensional transmission line inductance of parallel plate waveguide
  • C PPW capacitance of parallel plate waveguide
  • L SRR division Inductance
  • C SRR of ring-shaped resonator Capacitance
  • L ′ SRR of divided ring-shaped resonator Effective inductance C ′ SRR generated from the divided ring-shaped resonator when the equivalent circuit diagram of FIG. : Effective capacitance generated from the split ring resonator when the equivalent circuit diagram of FIG.
  • L ′ SRR , C ′ SRR , L SRR , and C SRR are represented by the following relational expressions.
  • M A mutual inductance between the inductance of the parallel plate line and the inductance of the split ring resonator.
  • Equation (1) becomes an electromagnetic wave that attenuates as it propagates in the positive direction of the x-axis in the frequency band where Equation (3) has capacitance (Im [Z] ⁇ 0). It can be seen that the waveguide structure of the embodiment has EBG characteristics. From this, it can be seen that the present invention can provide a waveguide structure having an EBG characteristic in which electromagnetic wave noise does not propagate in a frequency band in which Equation (3) becomes capacitive.
  • FIG. 9 shows a graph comparing the propagation characteristics of the waveguide structure of the present embodiment and a normal parallel plate waveguide analyzed by electromagnetic field analysis.
  • the propagation amount is attenuated in the specific frequency band (corresponding to the frequency band in which Equation (3) behaves as capacitance: the shaded portion in the figure).
  • the EBG characteristic is generated in the vicinity of 3.5 GHz. Thereby, it can confirm that this waveguide structure has an EBG characteristic.
  • a waveguide structure having an EBG characteristic is obtained by adding the above split ring resonator to a normal parallel plate waveguide.
  • the gap portion 109 of the split ring-shaped resonator 110 behaves as a capacitance, and the other portion behaves as an inductance, thereby forming an LC resonator.
  • the method of mounting the capacitance of the gap 109 has a very large degree of freedom, and the capacitance value does not necessarily correspond to the area occupied by the split ring resonator in a plan view.
  • the waveguide structure of the present embodiment can provide a waveguide structure having EBG characteristics with a small mounting area.
  • the waveguide structure described above can be formed through the following manufacturing process as an example.
  • a multilayer printed circuit board is created by layering a core material with copper foil on both sides and a prepreg, which is a resin material that bonds the core materials together.
  • a prepreg which is a resin material that bonds the core materials together.
  • Clearances locations without copper foil
  • a clearance hole is formed in the first conductor plane 102 and the second conductor plane 103 so that the drill hole passes through the clearance hole.
  • FIG. 10 is a plan view showing a waveguide structure according to the second embodiment of the present invention.
  • 11 is a cross-sectional view taken along line II-II in FIG.
  • FIG. 12 is a cross-sectional view taken along the line II-II of FIG. 10, showing another example of the waveguide structure of the second embodiment of the present invention.
  • 10 to 12 show the periphery of a region where one split ring resonator is arranged.
  • the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
  • At least one of the first connection portion 107, the second connection portion 108a, and the second connection portion 108b is in the same plane as the first conductor plane 102 and the second conductor plane 103. It is characterized by that.
  • the waveguide structure having the EBG characteristic includes the first conductor plane 102 and the second conductor provided on the surface layer or the inner layer of the printed circuit board 101 so as to be substantially parallel to the printed circuit board 101.
  • a split ring-shaped resonator 110 provided on the printed circuit board 101 so that the plane 103 and at least a part of the annular portion thereof are located between the first conductor plane 102 and the second conductor plane 103; Prepare.
  • the split ring-shaped resonator 110 is configured in a range surrounded by a rectangular dotted line.
  • the annular portion of the split ring-shaped resonator 110 is arranged so as to be included in the first region 104.
  • the split ring resonator is rectangular.
  • first conductive via 105 and the second conductive via 106 are provided on the printed circuit board 100 so that the first conductive via 105 and the second conductive via 106 are not electrically connected. Clearance holes are formed in the conductor plane 102 and the second conductor plane 103. At this time, the first conductor via 105 and the second conductor via 106 are provided at different positions in plan view.
  • the first connecting portion 107 is disposed in the clearance hole of the first conductor plane 102. That is, the printed circuit board 101 is provided with the first connection portion 107 that connects the first conductor via 105 and the second conductor via 106 in the same layer as the first conductor plane 102. Further, above or below the first connection portion 107, a second connection portion 108a having one end connected to the first conductor via 105 and the other end extending to the second conductor via 106, and the second connection via A second connection portion 108 b having one end connected to the conductor via 106 and the other end extending to the first conductor via 105 is provided on the printed circuit board 101. In FIG.
  • the second connection portion 108 a and the second connection portion 108 b are arranged in different layers, and the other end portions overlap each other in plan view to form a gap portion 109. .
  • the second connection portion 108a and the second connection portion 108b may be provided in the same layer.
  • FIG. 12 shows a case where the gap portion 109 is formed by providing a slit in the connection portion so as to divide the wiring. Furthermore, in FIG. 12, both the first connection portion 107, the second connection portion 108 a, and the second connection portion 108 b are in the same plane as the first conductor plane 102 and the second conductor plane 103. It is characterized by. That is, in FIG. 12, the second connection portion 10 a and the second connection portion 108 b are disposed in the clearance hole of the second conductor plane 103. That is, they are arranged on the same layer as the second conductor plane 103.
  • FIG. 10 to 12 show the case where the split ring-shaped resonator 110, the first conductor plane 102, and the second conductor plane 103 are not electrically connected by a clearance hole.
  • the conductor plane 102, the second conductor plane 103, and the split ring resonator 110 may not be electrically separated.
  • FIG. 35 is a modification of FIG.
  • the first connection portion 107 existing in the same layer as the first conductor plane 102 may be electrically connected.
  • a part of the first conductor plane behaves as the first connection portion.
  • the split ring resonator 110 is coupled to the parallel plate waveguide formed of the first conductor plane 102 and the second conductor plane 103 via a magnetic field.
  • At least one of the first connection portion 107, the second connection portion 108a, and the second connection portion 108b includes the first conductor plane 102, the second connection portion 108b, and the second conductor portion 102b. It exists in the same plane as the second conductor plane 103.
  • the first connection plane 107, the first connection portion 107, the second connection portion 108a, and the second connection portion 10b existing in the same plane as the second conductor plane 103 are the first conductor plane 102 or the second conductor plane 103. It can be formed in the manufacturing process of the second conductor plane 103.
  • FIG. 13 is a cross-sectional view showing a waveguide structure according to a third embodiment of the present invention.
  • FIG. 14 is a cross-sectional view showing another example of the waveguide structure according to the third embodiment of the present invention.
  • FIG. 15 is a sectional view showing still another example of the waveguide structure of the third embodiment of the present invention.
  • FIGS. 13 to 15 show the periphery of a region where one split ring resonator is arranged. Since this embodiment is a modification of the first embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.
  • This embodiment is characterized in that the annular portion of the split ring resonator has a portion that exists outside the first region 104.
  • the first connection portion 107, the second connection portion 108 a, and the second connection portion 108 b constituting the split ring resonator are located outside the first region 104. This is the case.
  • the first connection portion 107, the second connection portion 108 b, and the second connection portion 108 c may be located outside the first region 104.
  • the second connection portion 108 a is disposed in the first region 104 and one end is connected to the first conductor via 105.
  • the other end of the second connection portion 108 a is a conductor via that passes through the clearance hole of the second conductor plane 103 and is connected to the second connection portion 108 c outside the first region 104.
  • the second connecting portion 108b and the second connecting portion 108c are arranged in different layers, and the gap portion 109 is formed by having a portion overlapping in plan view.
  • the first conductor plane 102 and the second conductor plane 103 have a clearance so that the first conductor plane 102 and the second conductor plane 103 are not included inside the annular portion of the split ring resonator. A hole is formed.
  • the first conductor plane 102 and the second conductor plane 103 located in the split ring resonator are preferably clearance holes as shown in FIGS. 13 and 14, but as shown in FIG.
  • One conductor plane 102 and part of the second conductor plane 103 may exist.
  • the first connecting portion 107, the second connecting portions 108 and 108a, the second connecting portion 108b, the second connecting portion 108c, the first conductor via 105, and the second conductor via 106 are used.
  • the circumference of the split ring resonator 110 can be increased, that is, the LC resonance inductance component of the split ring resonator 110 can be increased.
  • increasing the inductance component in the split ring resonator leads to lowering the frequency band in which the EBG characteristics occur. This realizes a split ring resonator having a smaller area in plan view. That is, according to the present embodiment, it is possible to provide a waveguide structure having an EBG characteristic having a split ring resonator having a smaller area in plan view.
  • FIG. 16 and 17 are plan views showing the waveguide structure according to the present embodiment.
  • FIG. 20 is a cross-sectional view for explaining still another example of the waveguide structure of the present embodiment. Since this embodiment is a modification of the first embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.
  • This embodiment is characterized in that the first auxiliary conductor 112 is provided in the gap 109 connected capacitively of the split ring resonator 110 to increase the capacitance.
  • FIG. 16 shows that the rectangular first auxiliary conductor 112 is the same as the first connection portion 107 in the gap 109 of the first connection portion 107 when the first connection portion 107 exists in one layer. This is an example in which the capacitance is increased in the layer.
  • the shape of the first auxiliary conductor 112 may be a square shape as shown in FIG. 16, or may be an interdigital shape as shown in FIG. Other shapes may also be used.
  • the first connection portion 107 exists over two different layers, and a part of the first connection portion 107 that exists in one layer and the first connection portion that exists in another layer.
  • the gap portion 109 that is capacitively connected is realized by having a portion that overlaps a part of the connection portion 107 in plan view.
  • the auxiliary conductor 112 is provided in the gap 109 to increase the capacitance.
  • 18 is a cross-sectional view taken along line III-III in FIG.
  • FIG. 19 is a cross-sectional view taken along line IV-IV in FIG. As can be seen from FIG.
  • an auxiliary conductor 112 is provided in the first connecting portion 107 connected to the second conductor via 106, and the first connection connected to the first conductor via 105 is understood from FIG.
  • the auxiliary conductor 112 is provided in the part, and the capacitance of the gap part 109 is increased. 18 to 20, a square patch is provided as the first auxiliary conductor 112 to increase the capacitance.
  • the shape does not have to be a square, and may be another shape such as a circle.
  • the auxiliary conductor 112 does not need to be provided in one gap portion 109 as described in the drawing. If there are a plurality of gap portions, a plurality of sets of auxiliary conductors 112 may be provided in the plurality of gap portions 109. Good.
  • the capacitance component of the LC resonator composed of the split ring resonator can be increased by the auxiliary conductor. According to the equations (3), (5), and (6), increasing the capacitance component of the LC resonator leads to lowering the frequency band in which the EBG characteristics occur. This realizes a smaller split ring resonator. According to the present embodiment, it is possible to provide a waveguide structure having an EBG characteristic having a split ring resonator having a smaller size.
  • FIG. 21 is a plan view showing a waveguide structure according to a fifth embodiment of the present invention. Since this embodiment is a modification of the first embodiment, detailed description of the same parts as those of the first embodiment will be omitted.
  • the present embodiment considers a straight line in a plane parallel to the first conductor plane 102 of a split ring resonator and connecting the first conductor via 105 and the second conductor via 106.
  • the first conductor via 105 and the second conductor via 106 of another split ring-shaped resonator are in a plane parallel to the first conductor plane 102.
  • ⁇ 90 degrees
  • the magnitude of ⁇ is preferably close to 90 degrees.
  • the waveguide structure having EBG characteristics operates when a magnetic field passes through the annular portion of the split ring resonator 110 and current is induced in the LC resonator formed by the split ring resonator. .
  • the first conductor plane 102 The magnetic field component of the electromagnetic wave traveling in the direction perpendicular to the straight line connecting the first conductor via 105 and the second conductor via 106 passes through the annular portion of the split ring resonator. It does not penetrate.
  • FIG. 22 is a plan view showing a waveguide structure according to the sixth embodiment of the present invention.
  • FIG. 23 is a plan view showing another example of the waveguide structure according to the sixth embodiment of the present invention.
  • This embodiment is characterized by having a split ring resonator 110 and another split ring resonator that shares some of the components with the split ring resonator 110.
  • FIG. 22 shows an example in which the conductor via 105 or 106 is shared by two split ring resonators
  • FIG. 23 shows a part of the first connection 107 or the second connection 108, or In this example, both of the first connecting portion 107 and the second connecting portion 108 are shared by two split ring resonators.
  • Each split ring resonator includes a first conductor via, a second conductor via, a first connection portion, and a first connection portion. It consists of two connections.
  • one of the conductor vias of one split ring resonator and one of the conductor vias of another split ring resonator are shared, and two split ring resonators are connected.
  • the straight lines of the respective split ring resonators form an angle of 90 degrees, and thus have an “L” shape structure in plan view.
  • each split ring resonator has It is configured to behave independently as an LC resonator.
  • a resonator of one split ring and a resonator of another split ring share a part of the connecting portion, and two split ring resonators are connected.
  • the plan view has a “+”-shaped structure. It has become.
  • the plan view has a “+” shape.
  • FIGS. 22 and 23 show the case where two split ring resonators share a part of the split ring resonator, but three or more split ring resonators are used. The resonator may share a part of the split ring resonator.
  • a part of the split ring resonator 110 is shared with a part of another split ring resonator, a large number of split ring resonators are more densely printed. 101. This leads to a stronger effect of suppressing propagation of electromagnetic waves. That is, according to the present embodiment, a waveguide structure having EBG characteristics for obtaining a stronger electromagnetic wave propagation suppressing effect can be provided.
  • FIG. 24 is a plan view of the waveguide structure according to the present embodiment.
  • FIG. 25 is a cross-sectional view taken along the line VV in FIG. 26 is a cross-sectional view taken along line VI-VI in FIG.
  • the waveguide structure of the present embodiment is characterized in that a separate ring-shaped resonator 114 is provided at a location translated from the split ring-shaped resonator 110 by a distance d. At this time, it is desirable that the distance d is as small as possible, and it is desirable that the distance d be within ⁇ / 8 at most, where ⁇ is the wavelength of the electromagnetic wave whose propagation is to be suppressed. It should be noted that another split ring resonator 114 that has been translated by a distance d does not necessarily have to have a gap 109 that is capacitively coupled, and may have a structure without a gap as shown in FIG. 26, for example.
  • the split ring-shaped resonator shown in FIG. 25 includes a first conductor via 105, a second conductor via 106, a first connection portion 107, and a second connection portion 108.
  • the first conductor via 105 and the second conductor via 106 are connected to each other, and the first connection portion 107 is connected to the first conductor via 105 and the second via a gap 109 that is capacitively coupled.
  • the conductive via 106 is connected.
  • another split ring-shaped resonator 114 translated by the distance d shown in FIG. 26 does not have the gap 109, and both the first connection 107 and the second connection 108 are the first.
  • the conductive via 105 and the second conductive via 106 are connected without a gap 109 that is capacitively coupled.
  • a split ring-shaped resonator 110 and another split ring-shaped resonator 114 that has been translated from the split ring-shaped resonator 110 by a distance d behave as transmission lines. Resonance depending on the transmission line length occurs. That is, EBG characteristics can be obtained in a frequency band in which resonance depending on the transmission line length occurs, instead of LC resonance of a single resonator of a split ring shape.
  • FIG. 27 shows an electromagnetic field analysis model according to the present embodiment, in which another split ring-shaped resonator obtained by translating a split ring-shaped resonator is added to the electromagnetic field analysis model used in FIG. It is an analysis result of the propagation characteristic. It can be confirmed that the EBG characteristic generated in the vicinity of 3.5 GHz in FIG. 9 is generated in the vicinity of 2.6 GHz in FIG. That is, it can be seen from this example that the frequency can be lowered without changing the size of the split ring resonator. This leads to a smaller split ring resonator. That is, according to the present embodiment, it is possible to provide a waveguide structure having an EBG characteristic having a split ring resonator having a smaller size.
  • FIG. 28 is a plan view of the waveguide structure according to the present embodiment.
  • 29 is a cross-sectional view taken along line VII-VII in FIG.
  • FIG. 30 is a sectional view taken along line VIII-VIII in FIG.
  • FIG. 31 is a plan view of another example of the waveguide structure according to the present embodiment.
  • 32 is a cross-sectional view taken along line IX-IX in FIG.
  • FIG. 33 is a cross-sectional view taken along line XX of FIG.
  • the split ring-shaped resonator 110 described in the seventh embodiment and the other split ring-shaped resonator 114 obtained by translating the split ring-shaped resonator by a distance d are provided.
  • Two auxiliary conductors 113 are provided, and a capacitance is formed between the split ring resonator 110 and another split ring resonator 114.
  • the second auxiliary conductor 113 connected to the first connection portion 107 of the split ring resonator and the first auxiliary portion 107 connected to the first connection portion 107 of another split ring resonator 114.
  • a capacitance is formed between the two auxiliary conductors 113. For example, as shown in FIG.
  • the interdigital second auxiliary conductor 113 may be used to increase the capacitance, or one of the split ring resonator 110 and another split ring resonator 114.
  • the second auxiliary conductor 113 having a rectangular shape may be provided so that the portions are close to each other, thereby increasing the capacitance.
  • the second auxiliary conductor 113 having a rectangular shape is formed by using a layer different from the layer in which the connecting portions 107 and 108 of the split ring resonators 110 and 114 are present, and the capacitance is increased. It is an example of an example.
  • the second auxiliary conductor 113 is connected to the first connecting portion 107 of the split ring resonator 114, and the second auxiliary conductor 113 is as shown in FIG. 31 and FIG.
  • the first connecting portion 107 of the split ring resonator 110 overlaps in a plan view to form a capacitance.
  • FIG. 33 the second auxiliary conductor 113 having a rectangular shape is formed by using a layer different from the layer in which the connecting portions 107 and 108 of the split ring resonators 110 and 114 are present, and the capacitance is increased. It is an example of an example.
  • the second auxiliary conductor 113 is connected to the first connecting portion 107 of the split ring resonator 114, and the second
  • the square-shaped second auxiliary conductor 113 is used, but it does not have to be square, and may be any other shape such as a circle or an ellipse. Further, the second auxiliary conductor does not need to be provided at one place as described in the drawings, and a plurality of sets may be provided at a plurality of places.
  • a certain split ring resonator 110 and another split ring resonator 114 obtained by translating the split ring resonator 110 by a distance d. Behaves as a transmission line and obtains EBG characteristics by causing resonance depending on the transmission line length.
  • the frequency characteristic of the waveguide structure having the EBG characteristic described in the seventh embodiment is determined by the transmission line length, a smaller split ring resonator can be realized by reducing the effective transmission line length. It will be possible.
  • a second split ring-shaped resonator 110 which is a transmission line, and another split ring-shaped resonator 114 that has been translated from one split ring-shaped resonator 110 by a distance d, is a second transmission ring.
  • This is achieved by forming a capacitance using the auxiliary conductor 113. That is, according to this embodiment, the EBG characteristic of the seventh embodiment can be obtained by using a smaller split ring resonator.
  • the present invention has been described above with reference to the embodiments, the present invention is not limited to the above embodiments.
  • the clearance hole is formed in the first conductor plane 102 and the second conductor plane 103 has been described, but the clearance hole may not be formed as shown in FIG.
  • a part of the annular portion of the split ring resonator 110 may be disposed in the first region 104 of FIG. 34A or 34B.
  • 34A is a modification of FIG. 2
  • FIG. 34B is a modification of FIG.
  • the split ring resonator can be manufactured by a normal printed circuit board manufacturing process and is integrally formed in the waveguide structure, but the present invention is not limited thereto.
  • a component in which a split ring resonator is formed is prepared, and an opening from the surface to the first region 104 is provided in the printed circuit board 101, so that the split ring resonator is formed.
  • the waveguide structure of the present invention is inserted into the opening.
  • a waveguide structure having EBG characteristics characterized in that the annular portion is provided on the substrate.
  • the annular portion of the split ring resonator has first and second conductor vias provided at positions that do not overlap each other in plan view, the first conductor via, and the second conductor.
  • the open end pair of the split ring-shaped resonator has a gap formed in at least one of the first connection portion and the second connection portion.
  • the waveguide structure having EBG characteristics according to appendix 2 wherein the waveguide structure is formed by being divided in a plane substantially parallel to the main surface of the substrate. (Supplementary Note 5) At least one of the first connection portion and the second connection portion is disposed on substantially the same plane as the first conductor plane and the second conductor plane, Any one of appendix 2 to appendix 4, wherein a clearance hole is provided in at least one of the second conductor planes so as not to contact the first connection portion and the second connection portion.
  • At least one of the first connection portion and the second connection portion has a portion that exists outside a region sandwiched between the first and second conductor planes, and the first and the second The EBG according to any one of appendix 2 to appendix 4, wherein a clearance hole is provided in at least one of the second conductor planes so as not to contact the split ring resonator.
  • a waveguide structure having characteristics.
  • At least one of the open ends constituting the open end pair of the split ring resonator has an auxiliary conductor, and the auxiliary conductor constitutes the open end pair.
  • the waveguide structure having an EBG characteristic according to any one of appendix 1 to appendix 7, wherein an area of a portion where the ends are close to each other is increased.
  • a plurality of the split ring resonators are arranged on the substrate, and connect the first conductor via and the second conductor via of one split ring resonator.
  • Having a waveguide structure. (Supplementary note 10) The waveguide structure having EBG characteristics according to supplementary note 9, wherein the first straight line and the second straight line form an angle of 90 degrees.
  • a plurality of the split ring resonators are arranged on the substrate, and among the plurality of split ring resonators, at least one set of split ring resonators sharing a component is provided.
  • a plurality of the split ring resonators are arranged on the substrate, and the first conductor via of the one split ring resonator among the plurality of split ring resonators or the There is at least one split ring resonator set in which the second conductor via and the first conductor via or the second conductor via of the other split ring resonator are shared.
  • a plurality of the split ring resonators are arranged on the substrate, and the first connection portion of the one split ring resonator among the plurality of split ring resonators or the There is at least one split ring resonator set in which the second connection portion and the first connection portion or the second connection portion of the other split ring resonator are connected.
  • a ring-shaped conductor is disposed in the vicinity of the split ring-shaped resonator at a position translated by a predetermined distance, and the ring-shaped conductor includes the split ring-shaped resonator, or The waveguide structure having an EBG characteristic according to any one of appendices 1 to 13, wherein the waveguide structure has only an annular portion having no open end pair in the split ring resonator. .
  • At least one of the split ring resonator and the ring conductor has a second auxiliary conductor, and the second auxiliary conductor includes the split ring resonator and the ring. 15.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

La présente invention porte sur une structure de guide d'onde ayant une caractéristique EBG, apte à être montée dans une zone petite, lorsqu'elle est observée dans le plan. La structure de guide d'onde comprend une carte de circuits imprimés, un premier plan conducteur et un second plan conducteur disposés sur la carte de circuits imprimés de manière à être sensiblement parallèles l'un à l'autre, et un résonateur en forme d'anneau divisé. Le résonateur en forme d'anneau divisé comporte une partie d'anneau et au moins une paire d'extrémités ouvertes où la partie d'anneau est déconnectée. Les extrémités ouvertes constituant la paire d'extrémités ouvertes sont disposées de façon à être proches. Au moins une partie de la partie d'anneau du résonateur en forme d'anneau divisé est disposée dans une zone prise intercalée entre le premier plan conducteur et le second plan conducteur. La partie d'anneau est disposée de manière sensiblement non parallèle aux surfaces principales du premier plan conducteur et du second plan conducteur.
PCT/JP2013/002716 2012-05-10 2013-04-23 Structure de guide d'onde ayant une caractéristique ebg WO2013168377A1 (fr)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016129199A1 (fr) * 2015-02-12 2016-08-18 日本電気株式会社 Structure, et carte de circuit imprimé
WO2016129200A1 (fr) * 2015-02-12 2016-08-18 日本電気株式会社 Structure, et carte de circuit imprimé
JP2018139390A (ja) * 2017-02-24 2018-09-06 日本電信電話株式会社 電磁波変換プレート
CN115799790A (zh) * 2022-11-25 2023-03-14 厦门大学 多层堆叠间隙波导结构

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62183202A (ja) * 1986-02-06 1987-08-11 Matsushita Electric Ind Co Ltd ストリツプ線路共振器
JP2010010183A (ja) * 2008-06-24 2010-01-14 Nec Corp 導波路構造およびプリント配線板
WO2012042717A1 (fr) * 2010-09-28 2012-04-05 日本電気株式会社 Structure et substrat de câblage

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62183202A (ja) * 1986-02-06 1987-08-11 Matsushita Electric Ind Co Ltd ストリツプ線路共振器
JP2010010183A (ja) * 2008-06-24 2010-01-14 Nec Corp 導波路構造およびプリント配線板
WO2012042717A1 (fr) * 2010-09-28 2012-04-05 日本電気株式会社 Structure et substrat de câblage

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016129199A1 (fr) * 2015-02-12 2016-08-18 日本電気株式会社 Structure, et carte de circuit imprimé
WO2016129200A1 (fr) * 2015-02-12 2016-08-18 日本電気株式会社 Structure, et carte de circuit imprimé
JPWO2016129199A1 (ja) * 2015-02-12 2017-12-07 日本電気株式会社 構造体および配線基板
US10079415B2 (en) 2015-02-12 2018-09-18 Nec Corporation Structure and wiring substrate
US10230143B2 (en) 2015-02-12 2019-03-12 Nec Corporation Structure and wiring substrate
JP2018139390A (ja) * 2017-02-24 2018-09-06 日本電信電話株式会社 電磁波変換プレート
CN115799790A (zh) * 2022-11-25 2023-03-14 厦门大学 多层堆叠间隙波导结构

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