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WO2002087012A1 - Antenne pifa a structure de plan de sol a haute impedance higp - Google Patents

Antenne pifa a structure de plan de sol a haute impedance higp Download PDF

Info

Publication number
WO2002087012A1
WO2002087012A1 PCT/SE2002/000720 SE0200720W WO02087012A1 WO 2002087012 A1 WO2002087012 A1 WO 2002087012A1 SE 0200720 W SE0200720 W SE 0200720W WO 02087012 A1 WO02087012 A1 WO 02087012A1
Authority
WO
WIPO (PCT)
Prior art keywords
counterpoise
antenna device
antenna
planar inverted
bandwidth
Prior art date
Application number
PCT/SE2002/000720
Other languages
English (en)
Inventor
Jonatan Redvik
Original Assignee
Telefonaktiebolaget Lm Ericsson
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
Priority claimed from SE0101427A external-priority patent/SE518517C2/sv
Application filed by Telefonaktiebolaget Lm Ericsson filed Critical Telefonaktiebolaget Lm Ericsson
Publication of WO2002087012A1 publication Critical patent/WO2002087012A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/0442—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular tuning means
    • 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
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in 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
    • H01Q15/0006—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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/0421—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with a shorting wall or a shorting pin at one end of the element

Definitions

  • the present invention relates to compact antenna devices and more particularly to a Planar Inverted F Antenna having inserted a high impedance ground-plane and being provided with a counterpoise of an optimized size as well as a method of achieving such a functional arrangement.
  • Wireless products of today and in the future must be miniaturized.
  • the trend is to integrate all electronics into one module.
  • Wireless products and their antennas must be miniaturized to be able to compete on the market of today.
  • the limit in size of the system antenna will be dependent on the bandwidth of the antenna, according to Wheeler's small antenna formula. Therefore the necessary bandwidth of the system sets the smallest size of the antenna.
  • the wireless products are often much smaller than the system wavelength. This will lead to that the antenna will induce a lot of currents on the rest of the conductors within the product. Therefore the whole product as a matter of fact acts as the antenna.
  • a counterpoise is a system of conductors, elevated above and insulated from the ground, forming a lower system of conductors of an antenna" . Therefore counterpoise is a better word than ground-plane.
  • BluetoothTM antenna design the resonance frequency and bandwidth of the reflected signal towards the output power amplifier are important design parameters.
  • PIFA Planar Inverted F Antenna
  • U/S. Patent No. 5,541,613 discloses a broadband antenna system utilizing multiple Photonic Band Gap crystals (PBG) for increasing its power efficiency over a larger range of frequencies than prior antenna systems.
  • PBG Photonic Band Gap crystals
  • Another document U.S. Patent No. 5,739,796 provides a multidimensional stacked Photonic Band Gap crystal structures improving the performance of current planar monolitic antennas and RF filters.
  • the document describes a manner in which a PBG structure may be used to improve characteristics of an antenna. Among other things this substrate may be used to improve the bandwidth of the antenna.
  • a document U.S. Patent No. 5,406,573 discloses a periodic dielectric structure for production of Photonic Band Gap and a method for producing a PBG substrate which can be used for making wave-guides, since such a material is an ideal reflector at the band gap frequencies. In this way the output efficiencies of antennas could be improved.
  • the present invention combines characteristics of Planar Inverted F Antennas (PIFA) and High Impedance Ground-Plane (HIGP) structures to increase the bandwidth of the PIFA by utilizing a Photonic Band Gap (PGB) structure and an optimized counterpoise size.
  • PIFA Planar Inverted F Antenna
  • HIGP High Impedance Ground-Plane
  • PGB Photonic Band Gap
  • By additionally optimizing the size of a present counterpoise cooperating with the antenna device a best possible bandwidth of the device is obtained.
  • a counterpoise antenna arrangement according to the present invention is set forth by the independent claim 1, and further embodiments of the invention are set forth by the dependent claims 2 to 4.
  • FIG. 1 illustrates reflection of signal from an antenna back to a power amplifier due to improper matching
  • FIG. 2 illustrates an illustrative embodiment of a Planar Inverted F Antenna positioned on a plate forming a counterpoise
  • FIG. 3 illustrates in a plan view the Planar Inverted F Antenna of FIG. 2 with its counterpoise;
  • FIG. 4 is a vertical cross section through the antenna according to FIG. 2 indicating an embedded high impedance ground-plane structure, and indicating a horizontal cross section X-X through the structures;
  • FIG. 5 illustrates a horizontal cross section along a line X-X of the Planar Inverted F Antenna of FIG. 4;
  • FIG. 6 illustrates an example of dimensions of a PBG Planar Inverted F Antenna, PIFA
  • FIG. 7 is a contour map illustrating antenna bandwidths between 50 MHz and 150 MHz using steps of 25 MHz between adjacent contours as a function of length and width of a present counterpoise when utilizing a PIFA arrangement according to the present invention at a frequency of 2,45 GHz.
  • Figure 1 illustrates a standard situation with a RF power amplifier connected to an antenna intended to irradiate the radio frequency power.
  • BW bandwidth
  • Changing the operation frequency just slightly may result in a mismatch between the amplifier and the antenna.
  • a part of the power will be reflected back towards the amplifier.
  • PBG Photonic Band Gap structure
  • a PIFA radiator 20 with its generally non-conducting carrier substrate 1 is placed on a module which in an illustrative embodiment is shaped as a rectangle or a square, which will then act as a counterpoise.
  • the counterpoise may form an arbitrary shaped base in line with a general module design.
  • Figure 2 illustrates an illustrative embodiment of a Planar Inverted F Antenna 20 positioned on a plate 10 forming a counterpoise.
  • the plate 10 may further carry additional components like for instance resistors, capacitors, semiconductor components and/ or a number of integrated circuits 12 as illustrated in
  • the circuits 12 may preferably be positioned at the lower surface of plate 10, while the entire upper surface constitutes a conducting surface screening the circuitry underneath.
  • Figure 4 is a vertical cross section through the PIFA device according to Figure 2, indicating an embedded high impedance ground-plane structure 25, and indicating a horizontal cross section X-X through the structure 25.
  • the high impedance ground-plane structure is connected to the plate constituting the counterpoise 10. Additionally, the PIFA structure is provided with a feeding pin 15, which in turn in the present embodiment via a through hole in the counterpoise 10 is connected to an output terminal of a power amplifier (not shown) supplying the radiator element 20 with radio frequency power to be radiated.
  • a power amplifier not shown
  • FIG. 5 is illustrated a horizontal cross section along a line X-X of the Planar Inverted F Antenna of FIG. 4 seen from below.
  • the extension of the radiator 20 at the top of the substrate material 1 is marked by a shaded area.
  • the single layer embedded high impedance ground-plane structure 25 is seen with its connections 27, which run down to the conducting counterpoise plate 10.
  • the following dimensions may be used for a single layer embedded structure 25.
  • a one-layer PBG structure it is important to use a low dielectric constant in layer 1 to lengthen L3 and a high dielectric constant in layer 2 to shrink LI.
  • the same dielectric constant can be used in both layers 1 and 2 by use of a multi-layer PBG structure.
  • MATLAB may typically be used to evaluate how the bandwidth, resonance frequency and feed point are varying with counterpoise width and length to thereby confirm an improved module antenna design.
  • the antenna block 1 may have a length of about 20 mm, a width about 4 mm and a thickness about 3 mm.
  • Figure 7 is illustrated a simplified plot of the output from a computer calculation of a matched counterpoise using the present suggested build-up of the PIFA radiator device for operation at about 2.45 GHz and utilizing the suggested computerized tools.
  • the plot in Figure 7 is from practical reasons just formed as a contour map covering bandwidths from about 50 MHz to about 150 MHz in steps of 25 MHz. This means that for instance a contour line marked with 125 means that within this contour the bandwidth is 125 MHz or better and outside the contour the bandwidth is less than 125 MHz.
  • the calculation in reality gives an even more detailed map which may be visualized as a color plot of bandwidths between 50 and 150 MHz for instance presenting a resolution of 10 MHz or better.
  • the width W of the counterpoise 10 was in the illustrative calculation varied in steps of 10 mm from 20 mm up to 200 mm and the length L of the counterpoise was varied in steps of 10 mm from 10 mm up to 200 mm.
  • the plot produced represents the antenna bandwidth by looking at the reflected signal from the antenna as a function of width and length of an actual counterpoise. For a length L « 40 mm and a width W « 20 mm of the counterpoise it is seen in Figure 7 that a bandwidth BW >125 MHz for the particular antenna may be obtained.
  • a proper size of the counterpoise can be found in combination with the present PIFA radiator device for operation at, for instance, 2.45 GHz with an optimum operating bandwidth. Consequently, the size of for instance a BluetoothTM product should follow any of the combinations of measures obtained from such a calculation of a matched counterpoise according to the present disclosure in order to obtain a desirable best possible bandwidth.

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Waveguide Aerials (AREA)

Abstract

L'invention concerne un dispositif d'antenne pour petit module de communication, à largeur de bande accrue, ainsi qu'un procédé d'obtention dudit système. Le dispositif de l'invention combine les caractéristiques des antennes en F renversé planes (PIFA) et des structures de plan de sol à haute impédance (HIGP), si bien que la largeur de bande de la PIFA est accrue, grâce à une structure à largeur de bande interdite photonique (PGB) et à une taille de contrepoids optimisée. Par l'insertion d'un plan de sol à haute impédance dans une antenne plane en F inversé (1), il est possible d'augmenter la largeur de bande de l'antenne sans en augmenter la hauteur. Par l'optimisation de la taille du contrepoids préexistant (10) coopérant avec le dispositif d'antenne, on obtient la meilleure largeur de bande possible pour le dispositif. L'utilisation d'une structure de plan de sol PBG pour le plan de sol à haute impédance intégré conjointement avec le contrepoids adapté, permet une autre augmentation de la largeur de bande.
PCT/SE2002/000720 2001-04-24 2002-04-12 Antenne pifa a structure de plan de sol a haute impedance higp WO2002087012A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
SE0101427A SE518517C2 (sv) 2001-04-24 2001-04-24 PIFA-antenn med HIGP-struktur samt förfarande för tillverkning av en sådan antenn
SE0101427-3 2001-04-24
US28996601P 2001-05-09 2001-05-09
US60/289,966 2001-05-09

Publications (1)

Publication Number Publication Date
WO2002087012A1 true WO2002087012A1 (fr) 2002-10-31

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
WO (1) WO2002087012A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2869726A1 (fr) * 2004-04-30 2005-11-04 Get Enst Bretagne Etablissemen Antenne plane a plots conducteurs s'etendant a partir d'au moins un element rayonnant, et procede de fabrication correspondant
FR2869727A1 (fr) * 2004-04-30 2005-11-04 Get Enst Bretagne Etablissemen Antenne planaire a plots conducteurs s'etendant a partir du plan de masse et/ou d'au moins un element rayonnant, et procede de fabrication correspondant
EP1684381B1 (fr) * 2005-01-19 2008-10-22 Topcon GPS LLC Antenne à plaque avec un substrat en forme de peigne
US7456792B2 (en) 2004-02-26 2008-11-25 Fractus, S.A. Handset with electromagnetic bra
EP2328235A1 (fr) * 2009-11-27 2011-06-01 BAE Systems PLC Antenne radar
WO2011064587A1 (fr) * 2009-11-27 2011-06-03 Bae Systems Plc Antenne radar
EP2650967A1 (fr) * 2010-12-07 2013-10-16 Huizhou Tcl Mobile Communication Co., Ltd. Antenne avec mise à la terre à bandes métalliques de surface à forte impédance en forme de croix et son dispositif de communication sans fil
CN103441339A (zh) * 2006-04-27 2013-12-11 泰科电子服务有限责任公司 异向材料天线设备
EP2650968A4 (fr) * 2010-12-07 2017-07-19 Huizhou Tcl Mobile Communication Co., Ltd. Antenne avec mise à la terre équipée de bandes métalliques de surface à forte impédance en forme de u et son dispositif de communication sans fil

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10322124A (ja) * 1997-05-20 1998-12-04 Nippon Antenna Co Ltd 広帯域板状アンテナ
WO1999050929A1 (fr) * 1998-03-30 1999-10-07 The Regents Of The University Of California Circuit destine a supprimer des courants de surface sur des metaux et technique afferente
JPH11340719A (ja) * 1998-05-28 1999-12-10 Mitsubishi Materials Corp アンテナ装置
JP2000101333A (ja) * 1998-09-21 2000-04-07 Sony Corp アンテナ装置及び携帯無線装置
US6111544A (en) * 1998-02-13 2000-08-29 Murata Manufacturing Co., Ltd. Chip antenna, antenna device, and mobile communication apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10322124A (ja) * 1997-05-20 1998-12-04 Nippon Antenna Co Ltd 広帯域板状アンテナ
US6111544A (en) * 1998-02-13 2000-08-29 Murata Manufacturing Co., Ltd. Chip antenna, antenna device, and mobile communication apparatus
WO1999050929A1 (fr) * 1998-03-30 1999-10-07 The Regents Of The University Of California Circuit destine a supprimer des courants de surface sur des metaux et technique afferente
JPH11340719A (ja) * 1998-05-28 1999-12-10 Mitsubishi Materials Corp アンテナ装置
JP2000101333A (ja) * 1998-09-21 2000-04-07 Sony Corp アンテナ装置及び携帯無線装置

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN *
SALONEN P. ET AL.: "A low-cost 2.45 GHz photonic band-gap patch antenna for wearable systems", ELEVENTH INTERNATIONAL CONFERENCE ON (IEE CONF. PUBL. NO. 480), ANTENNAS AND PROPAGATION, vol. 2, 17 April 2001 (2001-04-17) - 20 April 2001 (2001-04-20), pages 719 - 723 *

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7456792B2 (en) 2004-02-26 2008-11-25 Fractus, S.A. Handset with electromagnetic bra
FR2869727A1 (fr) * 2004-04-30 2005-11-04 Get Enst Bretagne Etablissemen Antenne planaire a plots conducteurs s'etendant a partir du plan de masse et/ou d'au moins un element rayonnant, et procede de fabrication correspondant
WO2005117208A1 (fr) * 2004-04-30 2005-12-08 Get/Enst Bretagne Antenne planaire à plots conducteurs à partir du plan de masse et/ou d'au moins un élément rayonnant, et procédé de fabrication correspondant.
JP2007535851A (ja) * 2004-04-30 2007-12-06 ジェウテ／ウエヌエステ・ブルターニュ 接地平面および／または少なくとも１つの放射素子から延びる導電性スタッドを有する平面アンテナとその製造方法
FR2869726A1 (fr) * 2004-04-30 2005-11-04 Get Enst Bretagne Etablissemen Antenne plane a plots conducteurs s'etendant a partir d'au moins un element rayonnant, et procede de fabrication correspondant
US8077092B2 (en) 2004-04-30 2011-12-13 Ecole Nationale Superieure Des Telecommunications De Bretagne Planar antenna with conductive studs extending from the ground plane and/or from at least one radiating element, and corresponding production method
EP1684381B1 (fr) * 2005-01-19 2008-10-22 Topcon GPS LLC Antenne à plaque avec un substrat en forme de peigne
US7710324B2 (en) 2005-01-19 2010-05-04 Topcon Gps, Llc Patch antenna with comb substrate
CN103441339A (zh) * 2006-04-27 2013-12-11 泰科电子服务有限责任公司 异向材料天线设备
CN103441339B (zh) * 2006-04-27 2016-01-13 泰科电子服务有限责任公司 异向材料天线设备
WO2011064587A1 (fr) * 2009-11-27 2011-06-03 Bae Systems Plc Antenne radar
US9190731B2 (en) 2009-11-27 2015-11-17 Bae Systems Plc Radar antenna
EP2328235A1 (fr) * 2009-11-27 2011-06-01 BAE Systems PLC Antenne radar
EP2650967A1 (fr) * 2010-12-07 2013-10-16 Huizhou Tcl Mobile Communication Co., Ltd. Antenne avec mise à la terre à bandes métalliques de surface à forte impédance en forme de croix et son dispositif de communication sans fil
EP2650967A4 (fr) * 2010-12-07 2014-07-16 Huizhou Tcl Mobile Comm Co Ltd Antenne avec mise à la terre à bandes métalliques de surface à forte impédance en forme de croix et son dispositif de communication sans fil
EP2650968A4 (fr) * 2010-12-07 2017-07-19 Huizhou Tcl Mobile Communication Co., Ltd. Antenne avec mise à la terre équipée de bandes métalliques de surface à forte impédance en forme de u et son dispositif de communication sans fil

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