+

CN113871876A - Independent control device and method for dual beam radiation based on SSPP waveguide - Google Patents

Independent control device and method for dual beam radiation based on SSPP waveguide Download PDF

Info

Publication number
CN113871876A
CN113871876A CN202111217620.7A CN202111217620A CN113871876A CN 113871876 A CN113871876 A CN 113871876A CN 202111217620 A CN202111217620 A CN 202111217620A CN 113871876 A CN113871876 A CN 113871876A
Authority
CN
China
Prior art keywords
radiation
waveguide
sspp
surface plasmon
dual
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CN202111217620.7A
Other languages
Chinese (zh)
Other versions
CN113871876B (en
Inventor
马慧锋
程章文
崔铁军
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Southeast University
Original Assignee
Southeast University
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 Southeast University filed Critical Southeast University
Priority to CN202111217620.7A priority Critical patent/CN113871876B/en
Publication of CN113871876A publication Critical patent/CN113871876A/en
Application granted granted Critical
Publication of CN113871876B publication Critical patent/CN113871876B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P3/00—Waveguides; Transmission lines of the waveguide type
    • H01P3/003—Coplanar lines
    • H01P3/006—Conductor backed coplanar waveguides
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/28—Adaptation for use in or on aircraft, missiles, satellites, or balloons
    • H01Q1/288—Satellite antennas
    • 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
    • H01Q15/24—Polarising devices; Polarisation filters 

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Remote Sensing (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Waveguide Aerials (AREA)

Abstract

本发明公开了基于SSPP波导的双波束辐射的独立调控装置及其方法，所述基于SSPP波导的双波束辐射的独立调控装置包括介质基板，位于介质基板上表面的金属条带和覆盖在该介质基板下表面的金属地板。金属条结构包含两端的共面波导匹配结构和和中间的人工表面等离激元结构。人工表面等离激元结构包括上下两个边带，每个边带包括若干按照复合周期调制排布的45°斜开槽人工表面等离激元单元结构，上下两个边带之间的斜开槽单元结构形成90°的角度，且开槽深度分别按照需求进行不同的设计。本发明通过分别设计两个波束不同的调制因子和初始相位差，即可实现分别独立地设计两个波束的辐射能量和极化状态。

Figure 202111217620

The invention discloses an independent control device for dual beam radiation based on SSPP waveguide and a method thereof. The independent control device for dual beam radiation based on SSPP waveguide comprises a dielectric substrate, a metal strip located on the upper surface of the dielectric substrate and a medium covering the dielectric substrate. Metal floor on the lower surface of the substrate. The metal strip structure includes a coplanar waveguide matching structure at both ends and an artificial surface plasmon structure in the middle. The artificial surface plasmon structure includes two upper and lower sidebands, each sideband includes a number of 45° inclined slotted artificial surface plasmon unit structures arranged according to the compound period modulation. The slotted unit structure forms an angle of 90°, and the slotted depths are designed differently according to requirements. In the present invention, the radiation energy and polarization state of the two beams can be independently designed respectively by designing different modulation factors and initial phase differences of the two beams.

Figure 202111217620

Description

Independent regulation and control device and method for dual-beam radiation based on SSPP waveguide
Technical Field
The invention belongs to the field of SSPP waveguides, and particularly relates to an independent control device and method for dual-beam radiation based on an SSPP waveguide.
Background
The response generated by the coupling of electromagnetic waves and free electrons on the metal surface is called surface plasmon polariton, has the characteristic of sub-wavelength in an optical band, can effectively transmit and localize optical waves, and is widely applied to optical communication systems. In order to achieve such electromagnetic response in the millimeter wave and microwave bands of lower frequency bands, uniform surface plasmon waveguides have been proposed, aiming to support and propagate surface electromagnetic waves with strong confinement, whose characteristics are very similar to those of surface plasmons, called artificial surface plasmons. The surface plasma waveguide with the characteristics of thinness and flexibility is provided, so that the compact artificial surface plasmon circuit has a brand-new development prospect in the application of microwaves and terahertz waves. In addition, the leaky-wave antenna based on the artificial surface plasmon has attracted extensive attention in recent years, and has the advantages of low profile, low cost, high directivity and the characteristic that a wave beam scans along with the frequency.
According to the existing research, the SSPP-based waveguide can generate leaky-wave radiation through periodic modulation, and the radiation energy or the polarization state can be flexibly designed. However, these SSPP waveguides after periodic modulation design can only generate single-beam radiation, and it is difficult to realize dual-beam or even multi-beam radiation simultaneously under the condition that the radiation energy and polarization mode are designed independently, and these limitations have been difficult to satisfy the system requirements. With the rapid development of wireless communication, multi-beam radiation and multi-polarization modulation technologies are receiving more and more attention, and the multi-beam radiation and multi-polarization modulation technologies have high application values particularly in multi-point communication such as satellite communication and personal terminals. In order to realize multi-beam radiation energy and multi-polarization modulation of leaky waves at the same time, related scientific researchers have made many efforts, but most of the work is based on two-dimensional holographic super-surfaces.
Disclosure of Invention
The invention aims to provide an independent control device and method for dual-beam radiation based on an SSPP waveguide, and aims to solve the technical problems that the SSPP waveguide which is designed through periodic modulation can only generate single-beam radiation generally, and dual-beam or even multi-beam radiation is difficult to realize simultaneously under the condition that radiation energy and a polarization mode are designed independently.
In order to solve the technical problems, the specific technical scheme of the invention is as follows:
an independent regulation and control device of dual-beam radiation based on SSPP waveguide comprises a dielectric substrate, a metal strip and a metal floor, wherein the metal strip is positioned on the upper surface of the dielectric substrate, the metal floor covers the lower surface of the dielectric substrate, and the metal strip comprises coplanar waveguide matching structures at two ends and an artificial surface plasmon structure in the middle;
the coplanar waveguide matching structure comprises a gradually-changed oblique slotted transition structure which is symmetrical along a central axis, the gradually-changed slotted line structure and an arc structure which is symmetrically arranged along the central axis are used for realizing an equivalent slotted line structure, and the gradually-changed oblique slotted transition structure is connected with the artificial surface plasmon structure;
the artificial surface plasmon structure comprises an upper sideband and a lower sideband, and each sideband comprises artificial surface plasmon unit structures which are modulated and arranged according to a composite period.
Further, the artificial surface plasmon unit structure is a 45-degree oblique grooving unit, and the grooving unit structures between the upper and lower side bands of the metal strip form an angle of 90 degrees and are perpendicular to each other.
Furthermore, the unit width and the grooving width of the artificial surface plasmon unit structure are the same, and the groove depth variation range is 0.453-2.710 mm.
Further, the cross section of the groove of the artificial surface plasmon unit structure along the self axis direction is rectangular, V-shaped or trapezoidal.
Further, a change in discontinuity generated by the surface impedance of the artificial surface plasmon structure satisfies the following formula:
Figure BDA0003311342600000021
wherein j is an imaginary unit, XsFor surface modulation of the average surface impedance of the metal strip, M1Is a modulation factor, M, of the first radiation beam2The modulation factors of the second radiation wave beam are all 0-0.23, P1Is the modulation period, P, of the first radiation beam2Is the modulation period of the second radiation beam,
Figure BDA0003311342600000031
Figure BDA0003311342600000032
is the initial phase of the first radiation beam produced by the y-side of the SSPP waveguide,
Figure BDA0003311342600000033
is the initial phase of the second radiation beam generated by the + -y-edge of the SSPP waveguide, the x-direction being the propagation direction of the electromagnetic wave along the impedance surface; the SSPP waveguide can realize dual-beam leaky-wave radiation by designing the surface impedance by using the formula.
Furthermore, the material of the dielectric substrate is F4BM 225.
Independent regulation and control method of dual-beam radiation based on SSPP waveguide, and different M are taken1、M2The value of (b) can correspond to the relative values of the radiation energies of the first radiation beam and the second radiation beam which are designed arbitrarily, and the ratio of the radiation energies of the first radiation beam and the second radiation beam is equal to M1 2：M2 2(ii) a Taking the difference in phase between the upper and lower sidebands
Figure BDA0003311342600000034
And
Figure BDA0003311342600000035
the value of (A) can correspond to the polarization mode of the first radiation beam and the second radiation beam which are designed arbitrarily, when
Figure BDA0003311342600000036
When it is horizontally polarized, when
Figure BDA0003311342600000037
Figure BDA0003311342600000038
When it is circularly polarized, when
Figure BDA0003311342600000039
Vertical linear polarization is adopted;
when two different modulation factors M are used1、M2And is out of phase
Figure BDA00033113426000000310
When the signal is zero, the artificial surface plasmons on the two sides of the SSPP waveguide are the same in structure and are symmetrical up and down, and dual-beam leaky-wave radiation with different radiation energy but consistent polarization modes is generated; when two identical modulation factors M are used1、M2And is out of phase
Figure BDA00033113426000000311
When the time is not zero at the same time, the structures of the artificial surface plasmons on the two sides of the SSPP waveguide are asymmetric, and dual-beam leaky-wave radiation with consistent radiation energy but different polarization modes is generated.
The independent regulation and control device and the method for the dual-beam radiation based on the SSPP waveguide have the following advantages that:
1. the independent regulation and control device for dual-beam radiation based on the SSPP waveguide combines the impedance surface modulation leaky-wave antenna theory and the artificial surface plasmon theory, and realizes dual-beam radiation in two different directions on a single metal strip of the SSPP waveguide.
2. According to the invention, the surface impedance can be flexibly designed by respectively designing the grooving depths of the upper and lower artificial surface plasmon unit structures, and when different modulation factors and initial phase differences are respectively designed, the independent and arbitrary design of the radiation energy and polarization mode of two beams can be realized. The waveguide is simple to manufacture and easy to integrate, can realize the design of the performance of two wave beams simultaneously only by one-step photoetching process, and has important application prospect in the fields of satellite communication, multipath communication networks, wireless network coverage and the like.
Drawings
FIG. 1 is a schematic structural diagram of an independent control device for dual-beam radiation based on SSPP waveguide according to the present invention;
FIG. 2 is a schematic diagram of a coplanar waveguide matching structure of the present invention;
FIG. 3 is a schematic structural arrangement diagram of a 45-degree obliquely grooved artificial surface plasmon unit modulated according to surface impedance;
FIG. 4 is a schematic structural diagram of a 45 degree slotted Unit1 of the present invention;
FIG. 5 is a graph of dispersion curves for 45-degree slant-slotted Unit1 and lightwaves for different slot depths according to the present invention;
FIG. 6 is a graph of the relationship between the groove depth and the imaginary part of the surface impedance of the 45-degree-oblique slotted Unit1 of the present invention;
FIG. 7(a) is the modulation factor (M) at 9.8GHz of the present invention1:M2)2Taking a three-dimensional radiation pattern with the ratio of 1: 3;
FIG. 7(b) is the modulation factor (M) at 9.8GHz of the present invention1:M2)2Taking a three-dimensional radiation pattern of 2: 3;
FIG. 7(c) is the modulation factor (M) at 9.8GHz of the present invention1:M2)2Taking a three-dimensional radiation pattern with the ratio of 1: 1;
FIG. 7(d) is the modulation factor (M) at 9.8GHz of the present invention1:M2)2Taking two-dimensional radiation patterns of 1:3, 2:3 and 1:1 at the xoz plane respectively;
FIG. 8(a) is a modulation factor (M) of the present invention1:M2)2Taking schematic diagrams of SSPP waveguides at 1:3, 2:3 and 1:1 respectively;
FIG. 8(b) shows the reflection coefficient S11 at the modulation factor (M) according to the present invention1:M2)2Respectively taking a schematic diagram that the ratio of 1:3, 2:3 and 1:1 are all lower than-10 dB;
FIG. 8(c) shows the transmission coefficient S21 at the modulation factor (M) according to the present invention1:M2)2Respectively taking a schematic diagram that the ratio of 1:3, 2:3 and 1:1 are all lower than-6 dB;
FIG. 9(a) is a diagram of the present invention at 9.8GHz
Figure BDA0003311342600000051
And
Figure BDA0003311342600000052
when on the xoz plane ExAnd EySimulated near field profiles at 9.8 GHz;
FIG. 9(b) is a diagram of the present invention at 9.8GHz
Figure BDA0003311342600000053
And
Figure BDA0003311342600000054
a far field radiation pattern simulated at the xoz plane;
FIG. 9(c) is a graph showing the frequency of 9.8GHz according to the invention
Figure BDA0003311342600000055
And
Figure BDA0003311342600000056
time xoz plane ExAnd EyA near field profile at 9.8 GHz;
FIG. 9(d) is a graph showing the frequency of 9.8GHz according to the invention
Figure BDA0003311342600000057
And
Figure BDA0003311342600000058
a far field radiation pattern simulated at the xoz plane;
FIG. 9(e) is a graph showing the frequency of 9.8GHz according to the invention
Figure BDA0003311342600000059
And
Figure BDA00033113426000000510
time xoz plane ExAnd EyA near field profile at 9.8 GHz;
FIG. 9(f) is a graph showing the frequency of 9.8GHz according to the invention
Figure BDA00033113426000000511
And
Figure BDA00033113426000000512
a far field radiation pattern simulated at the xoz plane;
FIG. 9(g) is a diagram of the present invention at 9.8GHz
Figure BDA00033113426000000513
And
Figure BDA00033113426000000514
time xoz plane ExAnd EyA near field profile at 9.8 GHz;
FIG. 9(h) is a diagram of the present invention at 9.8GHz
Figure BDA00033113426000000515
And
Figure BDA00033113426000000516
a far field radiation pattern simulated at the xoz plane;
FIG. 10(a) shows a difference in phase at 9.8GHz
Figure BDA00033113426000000517
And
Figure BDA00033113426000000518
schematic representation of an SSPP waveguide of (a);
FIG. 10(b) is at 9.8GHz
Figure BDA00033113426000000519
And
Figure BDA00033113426000000520
the simulation and test result of the S parameter is shown schematically;
FIG. 10(c) is at 9.8GHz
Figure BDA0003311342600000061
And
Figure BDA0003311342600000062
simulation of time, S parametersAnd a test result schematic;
FIG. 10(d) is at 9.8GHz
Figure BDA0003311342600000063
And
Figure BDA0003311342600000064
the simulation and test result schematic diagram of the S parameter and the circular polarization axial ratio is shown;
FIG. 10(e) is at 9.8GHz
Figure BDA0003311342600000065
And
Figure BDA0003311342600000066
and (3) a schematic diagram of simulation and test results of the S parameter and the circular polarization axial ratio.
The notation in the figure is: 1. a coplanar waveguide matching structure; 2. an artificial surface plasmon structure; 11. a gradually inclined slotting transition structure; 12. a gradual change slotline structure; 13. an arc-shaped structure; 21. and (3) an artificial surface plasmon unit structure.
Detailed Description
For better understanding of the purpose, structure and function of the present invention, the independent control device for dual-beam radiation based on SSPP waveguide and the method thereof will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, an independent regulation and control device for dual-beam radiation based on SSPP waveguide comprises a dielectric substrate, a metal strip on the upper surface of the dielectric substrate and a metal floor covering the lower surface of the dielectric substrate; the material of the dielectric substrate is selected to be F4BM225, the thickness t1 is 2mm, and the total length of the waveguide is 396 mm.
As shown in fig. 2, the metal strip comprises coplanar waveguide matching structures 1 at two ends and an artificial surface plasmon structure 2 in the middle; the coplanar waveguide structure comprises a plurality of gradient oblique slotted transition structures 11 which are symmetrical along a central axis, a gradient slot line structure 12 and arc structures 13 which are symmetrically arranged along the central axis and are used for realizing matching feed from an equivalent slot line structure to the artificial surface plasmon structure 2; the artificial surface plasmon structure 2 comprises an upper sideband and a lower sideband, and each sideband is formed by arranging artificial surface plasmon unit structures 21 which are arranged according to composite period modulation, so that directional dual-beam leaky wave radiation is realized; the artificial surface plasmon unit structure 21 is a 45-degree oblique slotted unit, the slotted unit structure between the upper and lower side bands of the metal strip forms an angle of 90 degrees, and radiated electric fields are mutually vertical. The cross section of the groove of the slotting unit of the artificial surface plasmon unit structure 21 along the axis direction is rectangular, V-shaped or trapezoidal.
As shown in fig. 3, the proposed artificial surface plasmon structure 2 is composed of an arrangement of 45 ° obliquely grooved artificial surface plasmon unit structures 21 whose upper and lower sides are perpendicular to each other, each sideband being independently designed. The surface impedance modulation is realized through the design of the grooving depth of the artificial surface plasmon unit structure 21, and after the artificial surface plasmon unit structure 21 is modulated by utilizing the composite period, the dual-beam leaky wave radiation can be realized. By adjusting the modulation factor M of the surface impedance1And M2The radiated energy of each beam can be controlled independently. In addition, due to the design of the double-sided 45-degree obliquely-slotted unit, the phase difference of two orthogonal electric field components of each beam can be independently and flexibly designed, so that one of the conditions for independently customizing the polarization state of each beam is met.
As shown in fig. 4, the artificial surface plasmon Unit structure 21 is denoted by Unit1, where the width of Unit1 is d, the groove width is a, the Unit height is H, and the groove depth of the artificial surface plasmon Unit structure varies from 0.1mm to 2.9 mm. Periodic modulation of the surface impedance is achieved with a gradual change in the groove depth.
When a signal is transmitted, energy is input into the waveguide through SMA (small radio frequency coaxial connector) joints welded at two ends, and is radiated out through the artificial surface plasmon structure 2 modulated according to the composite period after being matched with the coplanar waveguide structure, so that radiation beams in two directions are generated in the upper half space of the SSPP waveguide.
In the present embodiment, the radiation angles θ of the two beams generated by the complex periodic surface impedance formula1And theta2Can be calculated by the following formula:
Figure BDA0003311342600000071
wherein X ═ Xs/η0Is an average surface impedance XsAccording to free-space wave impedance η0The resulting coefficients were normalized to 376.7ohm,
Figure BDA0003311342600000072
is at a design frequency point f0Wave number of (c) is the speed of light, P1Is the modulation period, P, of the first radiation beam2The modulation period of the second radiation beam. When X is presentsThe radiation angle of the first radiation beam is determined by only P1Is determined by the radiation angle of the second radiation beam being only P2To be determined.
The dual-beam recombination period surface impedance generated by the artificial surface plasmon structure 2 can be calculated by the following formula:
Figure BDA0003311342600000081
wherein j is an imaginary unit, XsFor surface modulation of the average surface impedance of the metal strip, M1Is a modulation factor, M, of the first radiation beam2The modulation factors of the second radiation wave beam are all 0-0.23, P1Is the modulation period, P, of the first radiation beam2Is the modulation period of the second radiation beam,
Figure BDA0003311342600000082
Figure BDA0003311342600000083
is the initial phase of the first radiation beam produced by the y-side of the SSPP waveguide,
Figure BDA0003311342600000084
is formed by SSPP wavesThe ± y-side of the waveguide produces the initial phase of the second radiation beam, the x-direction being the propagation direction of the electromagnetic wave along the impedance surface. The SSPP waveguide can realize dual-beam leaky-wave radiation by designing the surface impedance by using the formula.
We chose the same X in the upper and lower + y and-y bandss、M1、M2、P1And P2The surface impedance is designed, so that two leakage waves generated at the upper side and the lower side are radiated to the same direction with the same energy amplitude. For the design of two-beam radiation energy, we design the hardening and tempering factor M1And M2To control the relative magnitude of the radiated energy. For the design of polarization state, since the 45 ° slots on both sides of the artificial surface plasmon structure are perpendicular to each other, the electric field components of the generated radiation beams are orthogonal, and the phase difference between the two orthogonal components is respectively determined by
Figure BDA0003311342600000085
And
Figure BDA0003311342600000086
and (6) determining. Due to M of upper and lower side bands1、M2Respectively identical, i.e. two mutually orthogonal energy radiations of the same amplitude are generated simultaneously on both sides, so that only one needs to be done
Figure BDA0003311342600000087
And
Figure BDA0003311342600000088
the phase difference of the orthogonal electric fields is designed, that is, the polarization states of the first radiation beam and the second radiation beam can be arbitrarily and independently designed. In summary, based on the proposed SSPP waveguide with double 45 ° slanted slots, dual-beam leaky-wave radiation can be achieved, and the modulation factor (M) can be designed separately1、M2) And the initial phase difference
Figure BDA0003311342600000089
To independently and flexibly regulate the radiation energy and polarization state of each radiation beamState.
As shown in the dispersion curves of the cells of fig. 5 for different groove depths, it can be seen that different groove depths correspond to different dispersion cut-off frequencies, and the deeper the notching, the lower the cut-off frequency.
As shown in fig. 6, the groove depth h and the surface impedance ηsurfThe imaginary part of the relationship curve, the ordinate is the imaginary part of the surface impedance, the unit is the imaginary number Ω, Ω denotes ohm. The abscissa is the groove depth h in mm, expressed in mm, and the other dimensions of the grooved cell structure are in accordance with the data given above.
According to the formulas (1) and (2), the radiation center frequency is 9.8GHz, and the radiation angles are respectively designed to be theta 140 ° and θ2X can be calculated for-35 ° radiation beams680ohm, modulation depth Mmax＝M1+M20.46, modulation period P1＝21.6mm,P211.6 mm. From the variation range of the surface impedance shown in fig. 4, a range of 365ohm to 995ohm is selected to design the artificial surface plasmon structure.
FIG. 7 shows that the modulation periods are respectively selected to be P at 9.8GHz1＝21.6mm、P2The phase difference is respectively selected as 11.6mm
Figure BDA0003311342600000091
The simulated far-field radiation pattern of the dual-beam SSPP waveguide. According to the formula (2), the upper and lower sideband structures of the artificial surface plasmon polariton structure are symmetrical to generate two angles theta 140 ° and θ2The polarization mode is horizontal linear polarization for-35 deg. wave beam. At this time, we only design the modulation factor M1And M2To control the relative radiated energy of the two beams, respectively. When M is1＝M2When the wavelength is 0.23, the artificial surface plasmon can be converted into two leaky waves having the same radiation energy, as shown in fig. 7 (a). When M is20.23 and M1 2：M2 2Are respectively 2:3 and 1:3 hours, the radiation energy of the first radiation beam is realized according to M1Is controlled, while the radiation energy of the second radiation beam is controlled by the fixed M2While remaining unchanged, their three-dimensional far-field radiation patterns are shown in fig. 7(b) and 7(c), respectively. The radiant energy can more intuitively show the above results on a linear scale, as shown in fig. 7(d), and xoz plane is taken as the observation plane. It can be seen that the radiated energy of the second radiation beam is substantially maintained at G in three cases217.5 without change, and the radiation energy of the first radiation beam reaches G respectively117, 10.5 and 5.5. It is worth mentioning that by varying the modulation factor M2The radiation energy of the second radiation beam can also be accurately controlled according to the same principle.
Fig. 8(a) shows SSPP waveguides with different modulation factors fabricated, fig. 8(b) shows simulated S11 parameters, and fig. 8(c) shows tested S21 parameters. Fig. 8(b) shows that the reflection coefficient (S11) is below-10 dB in all three cases, indicating that good matching and efficient radiation can be achieved around the design frequency of 9.8 GHz. FIG. 8(c) shows that the transmission coefficient (S21) is below-6 dB in all three cases, and with M1The transmission coefficient (S21) is slightly increased, which is caused by the total energy reduction of the radiated dual beams, further verifying the effect of the design.
FIG. 9 shows that the modulation periods are respectively selected to be P at 9.8GHz1＝21.6mm、P2The modulation factors are all selected to be M as 11.6mm1＝M2The simulated near-field and far-field radiation patterns for the dual-beam SSPP waveguide are 0.23. According to the formula (2), the upper and lower sidebands of the artificial surface plasmon structure are arranged
Figure BDA0003311342600000101
And
Figure BDA0003311342600000102
asymmetric when not simultaneously 0, producing two beams of equal energy. At this time, we only design the phase difference
Figure BDA0003311342600000103
And
Figure BDA0003311342600000104
to control the polarization states of the two beams separately. For simple calculation, we select
Figure BDA0003311342600000105
Therefore, it is not only easy to use
Figure BDA0003311342600000106
And
Figure BDA0003311342600000107
when in use
Figure BDA0003311342600000108
And
Figure BDA0003311342600000109
there is no phase difference between the orthogonal electric field components of beam 1 and beam 2, both beams being horizontally polarized. FIG. 9(a) shows the simulated near field distribution in the xoz plane, and the results show that the artificial surface plasmons are converted into horizontally linearly polarized spatial waves (E)x) Respectively radiate to theta1And theta2In the direction of (A) without EyAnd (4) components. Fig. 9(b) shows a simulated far-field radiation pattern, further verifying that the two radiation beams are horizontally polarized waves with a cross-polarization level higher than 22 dB. When in use
Figure BDA00033113426000001010
And
Figure BDA00033113426000001011
the first radiation beam becomes a vertically linearly polarized wave due to a phase difference of-180 DEG introduced by the phases of the two orthogonal electric fields, and
Figure BDA00033113426000001012
the second radiation beam remains horizontally linearly polarized unchanged. Fig. 9(c) shows the near field distribution of Ex and Ey at 9.8GHz in the plane xoz, indicating that the near field of the first radiation beam has only the Ey component and the second radiation beam still has only the Ex component. FIG. 9(d) also shows the first radiation beamIs a vertically polarized wave and the second radiation beam is a horizontally polarized wave. When in use
Figure BDA00033113426000001013
And
Figure BDA00033113426000001014
Figure BDA00033113426000001015
at this time, the first radiation beam is a horizontally polarized wave, and the orthogonal electric field of the second radiation beam becomes a circularly polarized wave due to the introduction of the 90 ° phase difference. Fig. 9(E) shows a simulated near field distribution in the y-xoz plane, the first radiation beam having only ExComponent and the second radiation beam has E at the same timexAnd EyThe components, amplitudes are almost the same and the phase difference is 90 °. Fig. 9(f) shows a simulated far field radiation pattern, further verifying that the first radiation beam is a horizontally linearly polarized wave and the second radiation beam is a left-handed circularly polarized wave. When in use
Figure BDA00033113426000001016
Figure BDA00033113426000001017
And
Figure BDA00033113426000001018
in this case, since a phase difference of-90 ° and 90 ° is introduced between two orthogonal electric field components of the first radiation beam and the second radiation beam, respectively, both the first radiation beam and the second radiation beam will be converted into circularly polarized waves. FIG. 9(g) shows the simulated near field distribution at plane xoz, indicating the E of the two beamsxAnd EyThe amplitude of the components is almost the same, but E of the first radiation beamyPhase ratio ExPhase delayed by 90 DEG, and E of the second radiation beamyThe phase is advanced 90 deg. from the Ex phase. Fig. 9(h) shows a simulated far field radiation pattern, indicating that the first radiation beam is a right-hand circularly polarized wave and the second radiation beam is a left-hand circularly polarized wave.
Fig. 10(a) shows SSPP waveguides with different phase differences, fig. 10(b), 10(c), 10(d), and 10(e) show simulated and measured S parameters and axial ratios of circularly polarized waves for four polarization combinations, respectively, and the results show that S11 and S21 are both almost less than-10 dB, indicating good radiation efficiency, and all the axial ratios of circularly polarized waves are less than 2.5dB, indicating good circular polarization performance.
The invention provides an independent regulation and control device and method for dual-beam radiation based on SSPP waveguide, which designs the surface impedance of an artificial surface plasmon structure according to composite period modulation so as to generate dual-leakage wave radiation. The radiation energy and the polarization mode of each wave beam can be independently designed by designing the modulation factor and the phase difference of the upper sideband and the lower sideband, and the method is a design method for independently regulating and controlling the radiation energy and the polarization state of the dual wave beams on a single SSPP waveguide simply and flexibly. The invention has the advantages of simple manufacture, convenient operation, easy integration and cost saving, and has potential application prospect in the fields of satellite communication, multi-network and wireless network coverage and the like.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims (7)

1. An independent regulation and control device of dual-beam radiation based on SSPP waveguide is characterized by comprising a dielectric substrate, a metal strip and a metal floor, wherein the metal strip is positioned on the upper surface of the dielectric substrate, the metal floor covers the lower surface of the dielectric substrate, and the metal strip comprises coplanar waveguide matching structures (1) at two ends and an artificial surface plasmon structure (2) in the middle;
the coplanar waveguide matching structure (1) comprises a gradually-changed oblique slotted transition structure (11) which is symmetrical along a central axis, a gradually-changed slotted line structure (12) and arc structures (13) which are symmetrically arranged along the central axis are used for realizing an equivalent slotted line structure, and the gradually-changed oblique slotted transition structure (11) is connected with the artificial surface plasmon structure (2);
the artificial surface plasmon structure (2) comprises an upper sideband and a lower sideband, and each sideband comprises artificial surface plasmon unit structures (21) which are modulated and arranged according to a composite period.
2. The independent control device of dual beam radiation based on SSPP waveguide of claim 1, wherein the artificial surface plasmon unit structure (21) is a 45 ° oblique slotted unit, and the slotted unit structure between the upper and lower sidebands of the metal strip forms an angle of 90 ° and is perpendicular to each other.
3. The SSPP waveguide-based dual-beam radiation independent regulation and control device as claimed in claim 2, wherein the cell width and the groove width of the artificial surface plasmon cell structure (21) are the same, and the groove depth variation range is 0.453 mm-2.710 mm.
4. The independent tuning device for dual beam radiation based on SSPP waveguide of claim 3, wherein the cross-sectional shape of the groove of the artificial surface plasmon unit structure (21) along its own axis direction is rectangular, V-shaped or trapezoidal.
5. The independent device for the modulation of dual beam radiation based on SSPP waveguides of claim 4, wherein the surface impedance of the artificial surface plasmon structure (2) satisfies the following formula:
Figure FDA0003311342590000011
wherein j is an imaginary unit, XsFor surface modulation of the average surface impedance of the metal strip, M1Is a modulation factor, M, of the first radiation beam2The modulation factors of the second radiation wave beam are all 0-0.23, P1Is the modulation period, P, of the first radiation beam2Is the modulation period of the second radiation beam,
Figure FDA0003311342590000021
Figure FDA0003311342590000022
is the initial phase of the first radiation beam produced by the y-side of the SSPP waveguide,
Figure FDA0003311342590000023
is the initial phase of the second radiation beam generated by the + -y-edge of the SSPP waveguide, the x-direction being the propagation direction of the electromagnetic wave along the impedance surface; the SSPP waveguide can realize dual-beam leaky-wave radiation by designing the surface impedance by using the formula.
6. The SSPP waveguide-based dual beam radiation independent conditioning device of claim 5, wherein the dielectric substrate is F4BM 225.
7. The SSPP waveguide-based dual beam radiation independent conditioning method of any one of claims 1 to 6, wherein different M's are taken1、M2The value of (b) can correspond to the relative values of the radiation energies of the first radiation beam and the second radiation beam which are designed arbitrarily, and the ratio of the radiation energies of the first radiation beam and the second radiation beam is equal to M1 2：M2 2(ii) a Taking the difference in phase between the upper and lower sidebands
Figure FDA0003311342590000024
And
Figure FDA0003311342590000025
the value of (A) can correspond to the polarization mode of the first radiation beam and the second radiation beam which are designed arbitrarily, when
Figure FDA0003311342590000026
When it is horizontally polarized, when
Figure FDA0003311342590000027
When it is circularly polarized, when
Figure FDA0003311342590000028
Vertical linear polarization is adopted;
when two different modulation factors M are used1、M2And is out of phase
Figure FDA0003311342590000029
When the time is zero, the artificial surface plasmon structures (2) on two sides of the SSPP waveguide are the same and are symmetrical up and down, and dual-beam leaky-wave radiation with different radiation energy but consistent polarization modes is generated; when two identical modulation factors M are used1、M2And is out of phase
Figure FDA00033113425900000210
When the time is not zero at the same time, the structures of the artificial surface plasmons on the two sides of the SSPP waveguide are asymmetric, and dual-beam leaky-wave radiation with consistent radiation energy but different polarization modes is generated.
CN202111217620.7A 2021-10-19 2021-10-19 Independent control device and method for dual-beam radiation based on SSPP waveguide Active CN113871876B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111217620.7A CN113871876B (en) 2021-10-19 2021-10-19 Independent control device and method for dual-beam radiation based on SSPP waveguide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111217620.7A CN113871876B (en) 2021-10-19 2021-10-19 Independent control device and method for dual-beam radiation based on SSPP waveguide

Publications (2)

Publication Number Publication Date
CN113871876A true CN113871876A (en) 2021-12-31
CN113871876B CN113871876B (en) 2025-04-25

Family

ID=79000368

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111217620.7A Active CN113871876B (en) 2021-10-19 2021-10-19 Independent control device and method for dual-beam radiation based on SSPP waveguide

Country Status (1)

Country Link
CN (1) CN113871876B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118399069A (en) * 2024-06-24 2024-07-26 中兴通讯股份有限公司 Omnidirectional antenna and communication equipment
CN118970444A (en) * 2024-09-29 2024-11-15 华东交通大学 A beam scanning antenna

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107248616A (en) * 2017-06-07 2017-10-13 东南大学 Same frequency dual-circle polarization leaky-wave antenna based on artificial surface phasmon
US20190326679A1 (en) * 2018-04-23 2019-10-24 University Of Electronic Science And Technology Of China Curved near-field-focused slot array antennas
CN111029766A (en) * 2019-12-26 2020-04-17 杭州电子科技大学 Horizontal polarization omnidirectional antenna based on artificial local surface plasmon

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107248616A (en) * 2017-06-07 2017-10-13 东南大学 Same frequency dual-circle polarization leaky-wave antenna based on artificial surface phasmon
US20190326679A1 (en) * 2018-04-23 2019-10-24 University Of Electronic Science And Technology Of China Curved near-field-focused slot array antennas
CN111029766A (en) * 2019-12-26 2020-04-17 杭州电子科技大学 Horizontal polarization omnidirectional antenna based on artificial local surface plasmon

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
韩亚娟;张介秋;李勇峰;王甲富;屈绍波;张安学;: "基于微波表面等离激元的360°电扫描多波束天线", 物理学报, no. 14, 23 July 2016 (2016-07-23) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118399069A (en) * 2024-06-24 2024-07-26 中兴通讯股份有限公司 Omnidirectional antenna and communication equipment
CN118970444A (en) * 2024-09-29 2024-11-15 华东交通大学 A beam scanning antenna

Also Published As

Publication number Publication date
CN113871876B (en) 2025-04-25

Similar Documents

Publication Publication Date Title
Xu et al. A wide-angle narrowband leaky-wave antenna based on substrate integrated waveguide-spoof surface plasmon polariton structure
Fan et al. Frequency scanning radiation by decoupling spoof surface plasmon polaritons via phase gradient metasurface
Zheng et al. Transversely slotted SIW leaky-wave antenna featuring rapid beam-scanning for millimeter-wave applications
Jidi et al. Ultrawide-angle and high-scanning-rate leaky wave antenna based on spoof surface plasmon polaritons
Le Zhang et al. High-gain millimeter-wave antennas based on spoof surface plasmon polaritons
Li et al. Phase transforming based on asymmetric spoof surface plasmon polariton for endfire antenna with sum and difference beams
Zhong et al. 45° linearly polarized and circularly polarized high-scanning-rate leaky-wave antennas based on slotted substrate integrated waveguide
CN105261841A (en) Quasi-surface plasmon-based leaky-wave antenna
Liu et al. Single-beam leaky-wave antenna with lateral continuous scanning functionality based on spoof surface plasmon transmission line
CN107248616A (en) Same frequency dual-circle polarization leaky-wave antenna based on artificial surface phasmon
Vosoogh et al. Simple formula for aperture efficiency reduction due to grating lobes in planar phased arrays
Hong et al. Air-filled substrate integrated waveguide leaky-wave antenna with wideband and fixed-beam characteristics
CN105576380A (en) Broadband, high-gain and double-slot Vivaldi antenna
CN111555023B (en) Sum-difference beam antenna with asymmetric dual artificial surface plasmon
Liu et al. Single-layer high gain endfire antenna based on spoof surface plasmon polaritons
Liu et al. Compact fully metallic millimeter-wave waveguide-fed periodic leaky-wave antenna based on corrugated parallel-plate waveguides
Yin et al. Frequency scanning single-ridge serpentine dual-slot-waveguide array antenna
Fu et al. Design of a compact omnidirectional leaky-wave antenna fed by higher order mode
CN113871876B (en) Independent control device and method for dual-beam radiation based on SSPP waveguide
Wei et al. Ku/Ka dual-band shared-aperture leaky-wave antenna with fixed-frequency and wide-angle beam scanning based on ridged SIW
CN114824755A (en) Leaky-wave antenna based on SSPP
Ge et al. A dual-band frequency scanning antenna based on spoof SPPs transmission line
Yin et al. Continuously beam-scanning leaky-wave antenna based on impedance-matched spoof surface plasmon polaritons
Wang et al. Stable and Continuous Dual-Band Leaky-wave Radiation Based on the SSPPs and Periodic Mode-modulation Method
Ji et al. Dual-beam Frequency Scanning Antenna based on SSPP for Full-space Continuous Scanning

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
点击 这是indexloc提供的php浏览器服务，不要输入任何密码和下载