EP1229605A1 - Antenne imprimée à large bande - Google Patents

Antenne imprimée à large bande Download PDF

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Publication number
EP1229605A1
EP1229605A1 EP01600007A EP01600007A EP1229605A1 EP 1229605 A1 EP1229605 A1 EP 1229605A1 EP 01600007 A EP01600007 A EP 01600007A EP 01600007 A EP01600007 A EP 01600007A EP 1229605 A1 EP1229605 A1 EP 1229605A1
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EP
European Patent Office
Prior art keywords
line
radiating element
dipole
antenna system
dimension
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.)
Withdrawn
Application number
EP01600007A
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German (de)
English (en)
Inventor
Iordanis Georgiadis
Jordan Bozmarov
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.)
Intracom SA
Original Assignee
Intracom SA
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 Intracom SA filed Critical Intracom SA
Publication of EP1229605A1 publication Critical patent/EP1229605A1/fr
Withdrawn legal-status Critical Current

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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
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/28—Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
    • H01Q9/285—Planar dipole
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/061—Two dimensional planar arrays
    • H01Q21/062—Two dimensional planar arrays using dipole aerials

Definitions

  • the present invention relates to a wideband printed antenna system for the microwave and mm-wave frequency range.
  • the present invention relates to wideband printed antenna system for C band.
  • Microstrip antennas have become a fast evolving topic in antenna technology, mainly due to the increased need for miniaturization, integration with microwave integrated circuits and cost-effectiveness.
  • microstrip antennas have inferior electrical characteristics, one of them being the narrower operational bandwidth.
  • the term operational bandwidth of an antenna refers to the radiation pattern (antenna gain, sidelobes level and cross-polarization) and impedance characteristics of the antenna.
  • the need for wideband operation is a desirable characteristic especially for higher frequencies, because dimensional tolerances become critical, as they become comparable to the wavelength, and severely affect the antenna performance.
  • U.S. Patent 6,037,911 (Brankovic et al) describes a wideband printed phased array antenna having more than 30% working range compared to known microstrip dipole antennas.
  • the document discloses an antenna with a plurality of single-element antenna systems, fed by a series of feeding lines, connected at T-junctions with particular features.
  • the object of the invention is a simple, single-element antenna system having the following characteristics: relatively increased wideband operation, low production costs, ease of fabrication, compact design, good efficiency, high gain, low tolerance sensitivity, multipurpose and mass-production capability
  • the antenna system comprises a) a dielectric substrate with a front and a back dielectric face, b) a dipole with a first radiating element for radiating and receiving electromagnetic signals being printed on the front face of the dielectric substrate and a second radiating element for radiating and receiving electromagnetic signals being printed on the back face of the dielectric substrate, c) a metal strip for supplying signals to and from the dipole, said metal strip having a first line coupled to the first radiating element and a second line coupled to the second radiating element.
  • the first line comprises a linear portion and a coupling element coupling the linear portion to the first radiating element and the second line has a linear portion and a coupling element coupling the linear portion to the second element.
  • the single-element antenna system provides the basic structure for antenna array systems, with potential applications in a) modern communication systems, such as personal communication systems, mobile satellite communications, wireless local area networks (WLANs), direct broadcast television (DBS), automotive radar systems, and b) military applications, such as wideband phased arrays for radar applications, ECM equipment, conformal phased arrays for telemetry systems, wideband jammers.
  • modern communication systems such as personal communication systems, mobile satellite communications, wireless local area networks (WLANs), direct broadcast television (DBS), automotive radar systems, and b) military applications, such as wideband phased arrays for radar applications, ECM equipment, conformal phased arrays for telemetry systems, wideband jammers.
  • Claims 2 and 3 define preferred embodiments of the radiating elements: according to claim the projection of the dipole to either side of the dielectric substrate has a butterfly shape, with an axis of symmetry coinciding with the direction of the metal strip for supplying signals to and from said dipole.
  • the butterfly shaped projection has a first dimension along the axis of symmetry and a second maximum dimension, normal to the first dimension, with the ratio of the second dimension over the first dimension being between 2.6 and 8. According to claim 3 this ratio is between 3.5 and 4.5.
  • the tangents of the periphery of the first radiating element and the second radiating element at their intersections with the axis of symmetry is oblique to the direction normal to the axis of symmetry at an angle, which according to claim 6 is between 10° and 50°. In a further embodiment, which defined in claim 7, this angle is preferably, between 25° and 42°.
  • the antenna of claim 10 comprises a plurality of the antenna systems in accordance with the invention.
  • Figure 1 shows a perspective view of an antenna system according to the present invention.
  • Figure 2 shows a schematic top view of the antenna system shown of figure 1.
  • Figure 3 shows a cross-sectional view of the balanced microstrip line structure.
  • Figures 4a and 4b show a schematic top view of radiators including coupling (matching) elements.
  • Figures 5a and 5b show possible shapes of the radiating elements according to the invention.
  • Figure 6 shows a particular shape of the radiating element.
  • FIG. 7 shows a top view of the proposed C band solution according to the present invention, including dimensions in mm.
  • Figure 8 shows the measured diagram of the input reflection coefficient of the antenna system shown in figure 7 as obtained using a scalar network analyzer.
  • Figure 9 shows a top view of the proposed butterfly antenna structure according to the present invention, including dimensions in mm.
  • Figure 10 shows the measured diagram of the input reflection coefficient of the antenna system shown in figure 9 as obtained using a scalar network analyzer.
  • FIG. 11 shows an antenna array comprising the single-element antenna systems in accordance with the present invention.
  • Figure 12 shows the measured diagram of the input reflection coefficient of the antenna array shown in figure 11 as obtained using a scalar network analyzer.
  • the proposed antenna system consists of a butterfly shaped dipole (radiator) comprising two radiating elements, balanced microstrip lines and balanced-to-unbalanced transition (balun) for the feeding network.
  • the shape of the radiating elements is isosceles trapezium with its sides, i.e. the edges of the radiating elements, being straight or almost straight lines.
  • the balun is made wideband enough, so that the antenna bandwidth is not restricted.
  • the whole structure is printed on a low-loss dielectric substrate and is placed about a quarter wavelength above a metal reflector plate.
  • the two radiating elements of the dipole are printed on the opposite side of the dielectric substrate.
  • the proposed antenna system achieves wideband operation; bandwidth enhancement over the conventional dipole element, is achieved by the specific shape of the radiating elements, the proper matching between the feeding line and the radiating elements, through a coupling element, which may be a tapered or stepped balanced portion of the microstrip line, and the distance of the substrate from the ground plane (metal plate).
  • the wideband antenna system of figure 1 comprises a dielectric substrate 1, having a front face and a back face, a butterfly shaped dipole, having a first radiating element 2 for radiating and receiving electromagnetic signals printed on the front face of the dielectric substrate 1, and a second radiating element 3 for radiating and receiving electromagnetic signals printed on the back face of the dielectric substrate 1.
  • the first radiating element 2 points in a first direction and the second radiating element 3 points in a second direction, which is opposite to that first direction.
  • metal strip means for supplying signals to and from the dipole with the metal strip means having a first line 4 adjacent the radiating element, printed on the front face of the substrate 1 and coupled to the first radiating element 2 and a second line 5 printed on the back face of the substrate 1 and coupled to the second radiating element 3.
  • the first line 4 has a linear portion with constant cross-section and a coupling element 10 adjacent the radiating element, coupling the linear portion to the first radiating element 2.
  • the second line 5 has a linear portion with constant cross-section and a coupling element 10 coupling the linear portion to the second radiating element 3.
  • a reflector 6 is located at a distance H parallel to the back face of the dielectric substrate 1.
  • Air or a low loss material 7 is provided between reflector 6 and the back face of the substrate 1.
  • the first and second lines are balanced and arranged parallel and opposite to each other on said front and back dielectric face, respectively.
  • the antenna system according to the present invention includes a transition element coupled to the first line 4 and the second line 5 to provide a transition between the first and second lines and the system front-end, for supplying signals to and from the antenna.
  • the transition element comprises a first element 8 and a second element 9 coupled to the first line 4 and the to the second line 5 respectively.
  • the dipole according to the invention consists of the two radiating elements 2 and 3.
  • the projection of the dipole on either face of the substrate 1 has a butterfly shape with an axis of symmetry 20, which coincides along the direction of the metal strip means 4, 5.
  • the dimension of the butterfly along the axis of symmetry equals W, whereas its maximum dimension in a direction normal to the axis of symmetry is 2L.
  • angle ⁇ defined i) by the tangent to the edge of the radiator at its intersection with the metal strip, and ii) the direction, which is normal to the metal strip lines 4, 5 and which coincides with the direction of the axis of symmetry 20, is preferably between 10° and 50°. Further advantages are offered when ⁇ is between 25° and 40°.
  • Figures 4a, 4b show an embodiment with the radiating elements 2, 3 being isosceles trapeziums, whereby its sides are straight lines of equal length.
  • L is the radiator length, which is equal to the height of the trapezium
  • W is the width of the smaller base of the trapezium
  • ⁇ is the angle between L and the adjacent side of the trapezium.
  • the application of the proposed system in lower or higher frequency ranges is possible by up or down scaling these dimensions.
  • Variation of the dielectric substrate 1 and the material 7 between the dielectric substrate 1 and the reflector metal plate 6 can influence the system performance. However, design parameters must be kept within the specified limits, in order to obtain wide impedance and gain bandwidth, while cross-polarization is kept in low level ( ⁇ -20dB).
  • Wider impedance bandwidth may be achieved by increasing the distance H of the dielectric from the ground plane (see figure 1). In this way the radius of the antenna impedance locus on the Smith Chart decreases and the gain in higher frequencies is decreased. In order to increase the gain of the antenna in higher frequencies, the distance from ground must be reduced, but in this case impedance bandwidth is reduced, and additional matching is needed. Therefore the distance has to be selected in such way so that by properly matching the antenna, impedance and antenna gain bandwidth can provide wideband operation. In accordance with the invention proper matching is achieved by providing coupling (matching) elements 10 which have the effect of reducing the radius of the impedance locus and moving its center to a point symmetrical to the axis of the real impedance on the Smith Chart.
  • the coupling element 10 of figure 2 has a tapered portion.
  • Figure 4a shows a matching element 10 with two portions having different widths, while the edges of the matching element 10 of figure 4b are curved.
  • the coupling elements 10 are located adjacent the radiating elements 2, 3 and may be integral parts of the first and second lines 4, 5 respectively. Final trimming of the antenna system, according to specific needs, may require additional matching elements 11, as shown in figure 2.
  • the radiating element of figure 5a has a concave shape and that of figure 5b has a convex.
  • the material at the corner formed between the side and the large base of the radiating elements of figure 6 is relieved and the two edges lines are connected by a portion of a circle 12 whose center 13 is located on plane of the radiating element, as indicated in figure 6.
  • the resulting dipole is shown in figure 9.
  • FIG 7 A top view of the proposed antenna system for C band operation, which is similar to the one presented in figure 2, is shown in figure 7.
  • the measured input reflection coefficient of the antenna system of figure 8 was obtained using a scalar network analyzer.
  • Wider antenna gain bandwidth with low cross-polarization level may be achieved with the antenna comprising the radiating element of figure 9 and reduced spacing from the reflector plate.
  • Other dimensions of this example are presented in figure 10.
  • the proposed system achieves wide bandwidth concerning impedance (frequency range 3.15-4.3GHz for S 11 ⁇ -15dB), antenna gain, cross-polarization and radiation pattern characteristics.

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  • Aerials With Secondary Devices (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Details Of Aerials (AREA)
EP01600007A 2001-02-02 2001-04-12 Antenne imprimée à large bande Withdrawn EP1229605A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GR20010100047A GR1003738B (el) 2001-02-02 2001-02-02 Συστημα τυπωμενης κεραιας ευρεου φασματος συχνοτητων.
GR2001100047 2001-02-02

Publications (1)

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EP1229605A1 true EP1229605A1 (fr) 2002-08-07

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GR (1) GR1003738B (fr)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1515396A2 (fr) 2003-09-09 2005-03-16 National Institute of Information and Communications Technology antenne bowtie imprimée à band ultra large
DE10351488A1 (de) * 2003-11-04 2005-06-16 Saint-Gobain Sekurit Deutschland Gmbh & Co. Kg Antennenanordnung und Fensterscheibe mit einer solchen Antennenanordnung
EP1566858A1 (fr) * 2004-02-19 2005-08-24 National Institute of Information and Communications Technology Antenne bow-tie à fente et à bande ultra large
EP1993169A1 (fr) * 2006-02-16 2008-11-19 NEC Corporation Antenne a bande large de petite taille et dispositif de communication radio
WO2010106073A1 (fr) * 2009-03-17 2010-09-23 Institut Telecom-Telecom Bretagne Antenne a double ailettes
CN101013772B (zh) * 2006-09-13 2011-09-07 北京航空航天大学 低频超宽带紧缩场馈源
GB2480003A (en) * 2010-04-26 2011-11-02 Pds Electronics Inc Parallel conductor, balanced transmission line, feeding an antenna array
US8669911B2 (en) 2010-04-26 2014-03-11 Pds Electronics, Inc. Balanced transmission line with parallel conductors
GB2510144A (en) * 2013-01-25 2014-07-30 Bae Systems Plc Dipole antenna array including at least one co-planar sub-array
JP5676722B1 (ja) * 2013-11-13 2015-02-25 三井造船株式会社 平面アンテナ及びレーダ装置
CN107978850A (zh) * 2017-10-11 2018-05-01 武汉市工程科学技术研究院 背腔蝶形探地雷达天线装置
CN108475844A (zh) * 2017-04-21 2018-08-31 深圳市大疆创新科技有限公司 天线、无人机的地面控制系统以及无人机系统
WO2018236994A1 (fr) * 2017-06-21 2018-12-27 Thomson Licensing Antenne métallique pliée à profil bas
US10186768B2 (en) 2013-01-25 2019-01-22 Bae Systems Plc Dipole antenna array
CN110534924A (zh) * 2019-08-16 2019-12-03 维沃移动通信有限公司 天线模组和电子设备
CN111653877A (zh) * 2020-05-25 2020-09-11 中国电子科技集团公司第二十研究所 一种高效能源蒙皮架构
CN112736496A (zh) * 2020-12-22 2021-04-30 北京工业大学 一种超宽带相控阵雷达天线电路
CN115020969A (zh) * 2022-05-30 2022-09-06 南京信息工程大学 一种应用于5g微基站的宽带极化可重构天线
CN115173073A (zh) * 2022-06-24 2022-10-11 四川大学 一种非周期性人工磁导体印刷偶极子天线

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
DEY S ET AL: "Analysis of cavity backed printed dipoles", ELECTRONICS LETTERS, IEE STEVENAGE, GB, vol. 30, no. 3, 3 February 1994 (1994-02-03), pages 173 - 174, XP006000134, ISSN: 0013-5194 *
EVTIOUSHKINE G A ET AL: "Very wideband printed dipole antenna array", ELECTRONICS LETTERS, IEE STEVENAGE, GB, vol. 34, no. 24, 26 November 1998 (1998-11-26), pages 2292 - 2293, XP006010649, ISSN: 0013-5194 *
SUPRIYO DEY: "BANDWIDTH ENHANCEMENT BY FLARED MICROSTRIP DIPOLE ANTENNA", PROCEEDINGS OF THE ANTENNAS AND PROPAGATION SOCIETY ANNUAL MEETING. 1991. VENUE AND EXACT DATE NOT SHOWN, NEW YORK, IEEE, US, vol. 1, 1991, pages 342 - 345, XP000242446, ISBN: 0-7803-0144-7 *
XUE FENGZHANG: "A BROADBAND PRINTED CIRCUIT ANTENNA WITH STRIP GRIDS", PROCEEDINGS OF THE ANTENNAS AND PROPAGATION SOCIETY ANNUAL MEETING. 1991. VENUE AND EXACT DATE NOT SHOWN, NEW YORK, IEEE, US, vol. 1, 1991, pages 154 - 157, XP000242407, ISBN: 0-7803-0144-7 *

Cited By (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1515396A2 (fr) 2003-09-09 2005-03-16 National Institute of Information and Communications Technology antenne bowtie imprimée à band ultra large
EP1515396A3 (fr) * 2003-09-09 2005-04-20 National Institute of Information and Communications Technology antenne bowtie imprimée à band ultra large
US7123207B2 (en) 2003-09-09 2006-10-17 National Institute Of Information And Communications Technology Ultra wideband bow-tie printed antenna
DE10351488A1 (de) * 2003-11-04 2005-06-16 Saint-Gobain Sekurit Deutschland Gmbh & Co. Kg Antennenanordnung und Fensterscheibe mit einer solchen Antennenanordnung
US7903042B2 (en) 2003-11-04 2011-03-08 Saint-Gobain Glass France Antenna arrangement and window fitted with this antenna arrangement
EP1566858A1 (fr) * 2004-02-19 2005-08-24 National Institute of Information and Communications Technology Antenne bow-tie à fente et à bande ultra large
US7193576B2 (en) 2004-02-19 2007-03-20 National Institute Of Information And Communications Technology Ultra wideband bow-tie slot antenna
EP1993169A1 (fr) * 2006-02-16 2008-11-19 NEC Corporation Antenne a bande large de petite taille et dispositif de communication radio
EP1993169A4 (fr) * 2006-02-16 2009-09-23 Nec Corp Antenne a bande large de petite taille et dispositif de communication radio
CN101385199B (zh) * 2006-02-16 2013-04-24 日本电气株式会社 小型宽带天线和无线电通信设备
US8125390B2 (en) 2006-02-16 2012-02-28 Nec Corporation Small-size wide band antenna and radio communication device
AU2007215840B2 (en) * 2006-02-16 2010-09-30 Nec Corporation Small-size wide-band antenna and radio communication device
CN101013772B (zh) * 2006-09-13 2011-09-07 北京航空航天大学 低频超宽带紧缩场馈源
FR2943465A1 (fr) * 2009-03-17 2010-09-24 Groupe Ecoles Telecomm Antenne a double ailettes
WO2010106073A1 (fr) * 2009-03-17 2010-09-23 Institut Telecom-Telecom Bretagne Antenne a double ailettes
GB2480003A (en) * 2010-04-26 2011-11-02 Pds Electronics Inc Parallel conductor, balanced transmission line, feeding an antenna array
GB2480003B (en) * 2010-04-26 2012-10-24 Pds Electronics Inc Balanced transmission line with parallel conductors
US8669911B2 (en) 2010-04-26 2014-03-11 Pds Electronics, Inc. Balanced transmission line with parallel conductors
GB2510144A (en) * 2013-01-25 2014-07-30 Bae Systems Plc Dipole antenna array including at least one co-planar sub-array
US10186768B2 (en) 2013-01-25 2019-01-22 Bae Systems Plc Dipole antenna array
US9746555B2 (en) 2013-11-13 2017-08-29 Mitsui Engineering & Shipbuilding Co., Ltd. Planar antenna and radar apparatus
JP5676722B1 (ja) * 2013-11-13 2015-02-25 三井造船株式会社 平面アンテナ及びレーダ装置
CN108475844A (zh) * 2017-04-21 2018-08-31 深圳市大疆创新科技有限公司 天线、无人机的地面控制系统以及无人机系统
CN108475844B (zh) * 2017-04-21 2020-10-30 深圳市大疆创新科技有限公司 天线、无人机的地面控制系统以及无人机系统
US11145984B2 (en) 2017-06-21 2021-10-12 Thomson Licensing Low-profile folded metal antenna
WO2018236994A1 (fr) * 2017-06-21 2018-12-27 Thomson Licensing Antenne métallique pliée à profil bas
CN110856456A (zh) * 2017-06-21 2020-02-28 汤姆逊许可公司 低高度折叠金属天线
CN107978850A (zh) * 2017-10-11 2018-05-01 武汉市工程科学技术研究院 背腔蝶形探地雷达天线装置
CN110534924B (zh) * 2019-08-16 2021-09-10 维沃移动通信有限公司 天线模组和电子设备
CN110534924A (zh) * 2019-08-16 2019-12-03 维沃移动通信有限公司 天线模组和电子设备
US11735807B2 (en) 2019-08-16 2023-08-22 Vivo Mobile Communication Co., Ltd. Antenna module and electronic device
CN111653877A (zh) * 2020-05-25 2020-09-11 中国电子科技集团公司第二十研究所 一种高效能源蒙皮架构
CN112736496A (zh) * 2020-12-22 2021-04-30 北京工业大学 一种超宽带相控阵雷达天线电路
CN112736496B (zh) * 2020-12-22 2023-01-13 北京工业大学 一种超宽带相控阵雷达天线电路
CN115020969A (zh) * 2022-05-30 2022-09-06 南京信息工程大学 一种应用于5g微基站的宽带极化可重构天线
CN115020969B (zh) * 2022-05-30 2023-05-09 南京信息工程大学 一种应用于5g微基站的宽带极化可重构天线
CN115173073A (zh) * 2022-06-24 2022-10-11 四川大学 一种非周期性人工磁导体印刷偶极子天线
CN115173073B (zh) * 2022-06-24 2023-08-29 四川大学 一种非周期性人工磁导体印刷偶极子天线

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