EP1498982A1 - A dielectric substrate single layer planar dipole antenna - Google Patents

A dielectric substrate single layer planar dipole antenna Download PDF

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Publication number
EP1498982A1
EP1498982A1 EP04011740A EP04011740A EP1498982A1 EP 1498982 A1 EP1498982 A1 EP 1498982A1 EP 04011740 A EP04011740 A EP 04011740A EP 04011740 A EP04011740 A EP 04011740A EP 1498982 A1 EP1498982 A1 EP 1498982A1
Authority
EP
European Patent Office
Prior art keywords
slot
single layer
dielectric
strips
planar antenna
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Withdrawn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
EP04011740A
Other languages
German (de)
English (en)
French (fr)
Inventor
Guido Biffi Gentili
Matteo Cerretelli
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.)
AUTOSONIK SpA
Ask Industries SpA
Original Assignee
AUTOSONIK SpA
Ask Industries SpA
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 AUTOSONIK SpA, Ask Industries SpA filed Critical AUTOSONIK SpA
Publication of EP1498982A1 publication Critical patent/EP1498982A1/en
Withdrawn legal-status Critical Current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
    • H01Q9/06—Details
    • H01Q9/065—Microstrip dipole antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00—Coupling devices of the waveguide type
    • H01P5/08—Coupling devices of the waveguide type for linking dissimilar lines or devices
    • H01P5/10—Coupling devices of the waveguide type for linking dissimilar lines or devices for coupling balanced with unbalanced lines or devices
    • 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
    • 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

Definitions

  • the present invention refers to a dielectric substrate single layer planar dipole antenna.
  • the present invention relates to a dielectric substrate single layer planar dipole antenna particularly suitable for wireless applications and remote control systems.
  • antennas are known in the art. They can be used for short-distance radio-links, particularly for vehicular applications (locking and unlocking doors, activating antitheft devices and searching the car on a crowed parking area). Most of such antennas use the classical grounded monopole; alternatively a trace of the rear window defroster can be used, if available. More simply the antenna can be realised by a short piece of isolated conductor (wire) hidden inside the vehicle.
  • the wave radiated from the transmitter unit can be polarized and that the polarization can be arbitraly vertical, horizontal or slanted, because its polarization state depends on how said unit is oriented during the handling. Statistically, however, the horizontal polarization prevails because it corresponds to the more natural handling of the said transmitting unit.
  • the polarization state is variable and it is mainly determined by the interaction of the antenna with the vehicle metal body, which produces a remarkable depolarization effect.
  • the antenna structure and position should be optimised during the design phase of the vehicle. This is often considered a burden from the most car producers because optimization studies increase the costs. Using instead a simple radiating wire inside the vehicle, the costs are reduced but the antenna performances become poor and unpredictable because the metallic body produces strong mismatching on a unbalanced antenna configuration.
  • the object of the present invention is to provide a simple, low cost highly efficient and reproducible planar antenna to be installed inside the vehicle, for instance on the dashboard, glasses, bumpers or other non-metallic parts of the car with minimal mechanical and aesthetical constrains.
  • Further object of the present invention is to provide an antenna easily reconfigurable and tuneable for operating on any vehicle type and installation place, offering good radiation efficiency also in presence of near metallic parts.
  • Further object of the present invention is to provide a linear polarized antenna easily to set for achieving a prevailing horizontal polarized pattern.
  • planar antenna of the present invention is obtained by:
  • the main advantage of the present invention consists on the use of a simple slot etched on a ground patch smaller than the wavelength to transform the balanced input of a planar dipole into a unbalanced input, suitable for direct coaxial cable connection.
  • a further advantage consists in that the dipolar planar antenna, while maintaining its fundamental electromagnetic properties, can be properly designed to be optimally fitted on different parts of the vehicle (for instance inside the rear-view mirror) by assuming a rectangular or polygonal shape, planar or conformed to any curved surface.
  • a further advantage comes from the possibility of varying independently the length of both dipole arms and the dimensions or the shapes of the slot in order to optimize the antenna resonant frequency, bandwidth and impedance matching, after its placing in the chosen position inside the vehicle.
  • a further advantage consists in the possibility of embedding the planar strips constituting the dipole arms inside a multilayer of at least two layers of dielectric/magnetic material, in order to increase the antenna compactness.
  • the single-layer planar antenna comprises at least one radiating dipole, constituted by two thin metallic traces or strips 1 having any shape such as linear, spiral, meander or like, fed in a balanced way by means of a slot 4 etched on a small ground plane 2 placed on the bottom layer of a dielectric supporting substrate 8.
  • the metallic traces or strips 1 are generally printed on the upper layer of said single thin dielectric substrate 8, by using the well known etching techniques widely used in the printed circuit boards production.
  • etching techniques widely used in the printed circuit boards production.
  • other techniques for producing those metallic traces or strips can be used, as for example serigraphy technique with a conductive paint; all the techniques are included in the scope of the present patent.
  • the metallic traces or strips 1 have an end connected to the lower ground plane 2 by means of metallized holes ("via-holes") or conductive rivets 3, directly or through a lumped impedance.
  • the lumped impedances can be inserted in-series along the metallic traces or strips 1, typically near the via-holes 3.
  • Said metallized holes 3 are disposed symmetrically with respect to the centre of the slot 4 and near its main edges in order to feed the two metallic traces or strips 1 in phase opposition, as required for a dipole antenna.
  • the conductive metallic traces or strips 1 constituting the radiant element By appropriately varying the shape of the conductive metallic traces or strips 1 constituting the radiant element, it is also possible to insert further metallic traces or strips, i.e. two strips 6, also these strips fed in phase opposition in a balanced way. Such further metallic strips can be dimensioned in order to extend the working bandwidth of the antenna or to realize a second band centred on a frequency different from the first one.
  • a typical example is a double band antenna, working respectively in the ISM (Industrial Scientific Medical) bands assigned to the keyless-entry system (434MHz and 868MHz).
  • the antenna can assume every shape such as rectangular, trapezoidal or generally polygonal, planar or curved, in order to conform, also aesthetically, with the requirements and bonds of the installation, for example, on a vehicle.
  • the antenna of the present invention shows a radiative behaviour completely similar to that of a classical dipole operating in the same working conditions.
EP04011740A 2003-07-18 2004-05-18 A dielectric substrate single layer planar dipole antenna Withdrawn EP1498982A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITRE20030073 ITRE20030073A1 (it) 2003-07-18 2003-07-18 Antenna planare monostrato.
ITMI20030073 2003-07-18

Publications (1)

Publication Number Publication Date
EP1498982A1 true EP1498982A1 (en) 2005-01-19

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP04011740A Withdrawn EP1498982A1 (en) 2003-07-18 2004-05-18 A dielectric substrate single layer planar dipole antenna

Country Status (2)

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EP (1) EP1498982A1 (it)
IT (1) ITRE20030073A1 (it)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006001971A2 (en) * 2004-06-15 2006-01-05 Illinois Tool Works Inc. Embedded antenna connection method and system
WO2007034238A1 (en) * 2005-09-19 2007-03-29 Antenova Limited Balanced antenna devices
EP1953864A1 (de) * 2007-02-02 2008-08-06 Hirschmann Car Communication GmbH Antenne, insbesondere für die Datenkommunikation via Satellit
EP2290746A1 (en) 2009-08-14 2011-03-02 HTC Corporation Planar antenna with isotropic radiation pattern
CN103779657A (zh) * 2012-10-23 2014-05-07 汤姆逊许可公司 紧凑型开槽天线
AU2013205196A1 (en) * 2013-03-04 2014-09-18 Loftus, Robert Francis Joseph MR A Dual Port Single Frequency Antenna
GB2531347A (en) * 2014-10-17 2016-04-20 Canon Kk High efficiency low thickness antenna device
CN107658553A (zh) * 2017-08-16 2018-02-02 深圳市维力谷无线技术股份有限公司 一种应用于uhf频段物联网天线
CN108808196A (zh) * 2018-06-01 2018-11-13 安徽禄讯电子科技有限公司 一种低互调两进一出电桥
EP3598569A1 (en) * 2014-04-07 2020-01-22 Synergy Microwave Corporation Balun circuit
CN113224515A (zh) * 2020-01-21 2021-08-06 大唐移动通信设备有限公司 天线装置及基站设备
CN116053793A (zh) * 2022-01-25 2023-05-02 北京星英联微波科技有限责任公司 紧凑型宽带新月形贴片对天线

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107959111B (zh) * 2017-11-20 2024-03-08 河南师范大学 一种双频电小缝隙天线
CN110829011A (zh) * 2019-11-18 2020-02-21 厦门大学嘉庚学院 分形元蓝牙及超宽带定位信标天线系统
CN114843755B (zh) * 2022-05-20 2023-09-08 电子科技大学重庆微电子产业技术研究院 一种基片集成波导缝隙阵列滤波天线

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2020192A1 (de) * 1970-04-24 1971-11-04 Siemens Ag Dipolstrahlerelement in Streifenleitungstechnik
EP1041671A1 (en) * 1998-09-28 2000-10-04 Mitsubishi Denki Kabushiki Kaisha Antenna feeding circuit
EP1154513A1 (en) * 1999-12-24 2001-11-14 Matsushita Electric Industrial Co., Ltd. Built-in antenna of wireless communication terminal

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2020192A1 (de) * 1970-04-24 1971-11-04 Siemens Ag Dipolstrahlerelement in Streifenleitungstechnik
EP1041671A1 (en) * 1998-09-28 2000-10-04 Mitsubishi Denki Kabushiki Kaisha Antenna feeding circuit
EP1154513A1 (en) * 1999-12-24 2001-11-14 Matsushita Electric Industrial Co., Ltd. Built-in antenna of wireless communication terminal

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
MENZEL W ET AL: "A MICROSTRIP PATCH ANTENNA WITH COPLANAR FEED LINE", IEEE MICROWAVE AND GUIDED WAVE LETTERS, IEEE INC, NEW YORK, US, vol. 1, no. 11, 1 November 1991 (1991-11-01), pages 340 - 342, XP000230628, ISSN: 1051-8207 *

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006001971A2 (en) * 2004-06-15 2006-01-05 Illinois Tool Works Inc. Embedded antenna connection method and system
WO2006001971A3 (en) * 2004-06-15 2006-02-09 Illinois Tool Works Embedded antenna connection method and system
WO2007034238A1 (en) * 2005-09-19 2007-03-29 Antenova Limited Balanced antenna devices
EP1953864A1 (de) * 2007-02-02 2008-08-06 Hirschmann Car Communication GmbH Antenne, insbesondere für die Datenkommunikation via Satellit
EP2290746A1 (en) 2009-08-14 2011-03-02 HTC Corporation Planar antenna with isotropic radiation pattern
US8264418B2 (en) 2009-08-14 2012-09-11 Htc Corporation Planar antenna with isotropic radiation pattern
CN103779657A (zh) * 2012-10-23 2014-05-07 汤姆逊许可公司 紧凑型开槽天线
US9819092B2 (en) 2012-10-23 2017-11-14 Thomson Licensing Compact slot antenna
US9413064B2 (en) 2013-03-04 2016-08-09 Robert Francis Joseph Loftus Dual port single frequency antenna
AU2013205196B2 (en) * 2013-03-04 2014-12-11 Loftus, Robert Francis Joseph MR A Dual Port Single Frequency Antenna
US9595764B2 (en) 2013-03-04 2017-03-14 Robert Francis Joseph Loftus Dual port single frequency antenna
AU2013205196A1 (en) * 2013-03-04 2014-09-18 Loftus, Robert Francis Joseph MR A Dual Port Single Frequency Antenna
EP3598569A1 (en) * 2014-04-07 2020-01-22 Synergy Microwave Corporation Balun circuit
GB2531347A (en) * 2014-10-17 2016-04-20 Canon Kk High efficiency low thickness antenna device
GB2531347B (en) * 2014-10-17 2018-12-05 Canon Kk High efficiency low thickness antenna device
CN107658553A (zh) * 2017-08-16 2018-02-02 深圳市维力谷无线技术股份有限公司 一种应用于uhf频段物联网天线
CN107658553B (zh) * 2017-08-16 2024-01-09 深圳市维力谷无线技术股份有限公司 一种应用于uhf频段物联网天线
CN108808196A (zh) * 2018-06-01 2018-11-13 安徽禄讯电子科技有限公司 一种低互调两进一出电桥
CN113224515A (zh) * 2020-01-21 2021-08-06 大唐移动通信设备有限公司 天线装置及基站设备
CN116053793A (zh) * 2022-01-25 2023-05-02 北京星英联微波科技有限责任公司 紧凑型宽带新月形贴片对天线
CN116053793B (zh) * 2022-01-25 2023-11-03 北京星英联微波科技有限责任公司 紧凑型宽带新月形贴片对天线

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Publication number Publication date
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