EP1812988B1 - Antenne a large bande planaire - Google Patents

Antenne a large bande planaire Download PDF

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Publication number
EP1812988B1
EP1812988B1 EP05779855A EP05779855A EP1812988B1 EP 1812988 B1 EP1812988 B1 EP 1812988B1 EP 05779855 A EP05779855 A EP 05779855A EP 05779855 A EP05779855 A EP 05779855A EP 1812988 B1 EP1812988 B1 EP 1812988B1
Authority
EP
European Patent Office
Prior art keywords
antenna
angled
impedance matching
mount
elliptical
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.)
Expired - Fee Related
Application number
EP05779855A
Other languages
German (de)
English (en)
Other versions
EP1812988A2 (fr
Inventor
Thomas Schano
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1812988A2 publication Critical patent/EP1812988A2/fr
Application granted granted Critical
Publication of EP1812988B1 publication Critical patent/EP1812988B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

Definitions

  • the present invention relates to a planar broadband antenna.
  • PIFA planar inverted-f antennas
  • Another antenna is a circular disk monopole, which has a circular antenna element which is arranged vertically standing to a carrier.
  • the circular antenna element is connected to the wire of a coaxial cable.
  • the emission characteristic of the croissant monopole has a minimum frequency. From this minimum frequency results in a nearly continuous radiation characteristic of the monopole in the frequency domain. An adaptation of the circular disk monopole to the environment is therefore not necessary.
  • the disadvantage of the disc monopoly is its vertical structure and the associated space requirements.
  • the circular antenna element typically has a diameter of about 10 cm. In addition, precautions must be taken to protect the outstanding round antenna element from mechanical effects.
  • an antenna structure which is formed as a curved ellipse above a conductive base plate and is connected on one side to the conductive base plate.
  • the US 2003/076269 A1 shows an exciter plate in the form of an ellipse, which is spaced from a conductive base plate.
  • the ellipse can also be angled there.
  • the EP 444679 A2 shows a planar radiating element over a conductive base plate with a vertical feed plate.
  • the WO 2004/073112 A1 shows a perpendicular to a conductive base plate arranged circular disk as a radiator, which may also be formed folded.
  • the US 6,124,829 shows a circular disk over a conductive plate with intervening short-circuiting elements.
  • the object of the present invention is to provide an improved broadband antenna with a low overall height.
  • a planar broadband antenna has a planar elliptical antenna device.
  • the elliptical antenna device has a central antenna element on a first and a second angled antenna element.
  • the middle antenna element is arranged parallel to a carrier.
  • the angled antenna elements are formed by two opposite segments of the elliptical antenna device.
  • the angled antenna elements point in the direction of the carrier.
  • a foot point is attached, via which a feed of a signal takes place.
  • An impedance matching element connects the second angled antenna element to a ground point located near the foot point.
  • the present invention has over the known approaches the advantage that the height of the planar broadband antenna is low.
  • the flat elliptical antenna device results in an almost continuous
  • the radiation characteristic largely corresponds to that of a circular disk monopole antenna.
  • the impedance matching element is flat and elliptical.
  • the impedance matching element of a further development has angled elements.
  • the impedance matching element has discrete components.
  • the carrier is conductive and connected to a ground.
  • a shielding device is mounted between the impedance matching element and the antenna device.
  • a shielding device can be prevented by the shielding an unwanted signal transmission from the impedance matching element to the antenna device via the air.
  • the impedance matching element and the antenna device are arranged on opposite sides of the carrier.
  • the elliptical shapes are approximated by polygonal shapes.
  • FIGS. 1 . 2 and 3 an embodiment of the present invention is shown.
  • a conductive support 1 an elliptical planar antenna device is arranged above a conductive support 1.
  • the antenna device is composed of a central antenna element 2 and a first angled antenna element 3 and a second angled antenna element 4.
  • the middle antenna element 2 largely has an elliptical shape. Only the ellipse lacks two opposing segments. The angled antenna elements have exactly the shape of these missing segments. The corresponding shape of the antenna device can be achieved starting from an ellipse by bending the two segments.
  • a foot 13 is attached at the top of the first angled antenna element 3.
  • the base 13 is connected to the wire 11 of a coaxial cable 9.
  • the coaxial cable is an example of conductors that are suitable for the transmission of high-frequency signals.
  • the tip of the second angled antenna element 4 is connected to an impedance matching device (impedance matching element) 7.
  • the adjusting device 7 is also designed elliptical.
  • the impedance matching device 7 connects the tip of the second antenna element 4 to a ground point 12. This ground point 12 is located near the foot point 13.
  • the ground point 12 can be connected to the shield 10 of the coaxial cable 9.
  • the impedance matching device 7 is located on the same side of the carrier 1 as the central antenna element 2. Another embodiment provides to arrange the impedance device 7 on the other side of the carrier 1. For this purpose, a bore is to be introduced into the carrier 1, by means of which the second antenna element 4 can be connected to the impedance device 7.
  • planar broadband antenna is the relatively low height, which in one embodiment is about 2 cm. Due to the elliptical structure of the antenna device and the impedance matching device 7, a radiation characteristic is achieved, which advantageously has a broad emission band like a circular disk monopole. Therefore, this antenna can be universally used for a wide frequency spectrum and without adjustments to the environment of the site.
  • the broadband antenna has no preferred emission direction in the carrier plane, but emits omnidirectional. This is necessary for the use of the antenna in a moving vehicle, since no alignment of the antenna can be achieved without much effort while driving.
  • the impedance matching device 7 may be shielded by one or more additional ground planes. In this way, interactions between the central antenna element 2 and the impedance matching device 7 can be suppressed, which result from emissions from the impedance device 7.
  • the shape of the antenna elements can be approximated by polygonal shapes.
  • the impedance matching device may comprise discrete components.

Landscapes

  • Details Of Aerials (AREA)
  • Waveguide Aerials (AREA)

Claims (7)

  1. Antenne plane à large bande, qui présente :
    un support (1),
    un dispositif d'antenne (2, 3, 4) en forme d'ellipse plate, fixé au support (1) et présentant un élément central d'antenne (2), un premier élément coudé d'antenne (3) et un deuxième élément coudé d'antenne (4), l'élément central d'antenne (2) étant disposé parallèlement au support (1), les éléments coudés d'antenne (3, 4) étant formés par deux segments opposés du dispositif d'antenne (2, 3, 4) en forme d'ellipse et les éléments coudés d'antenne (3, 4) étant tournés vers le support (1), un signal étant injecté par un point de pied (13) du premier élément coudé d'antenne (3) et
    un élément plat (7) d'adaptation d'impédance, en forme d'ellipse, disposé parallèlement à l'élément central d'antenne (2) et reliant l'élément coudé d'antenne (4) à un point de masse (12) situé à proximité du point de pied (13).
  2. Antenne plane à large bande selon la revendication 1, dans laquelle l'élément (7) d'adaptation d'impédance présente des éléments coudés.
  3. Antenne plane à large bande selon les revendications 1 ou 2, caractérisée en ce que l'élément (7) d'adaptation d'impédance présente des composants distincts.
  4. Antenne plane à large bande selon l'une des revendications 1 à 3, dans laquelle le support (1) est conducteur et est relié à une masse.
  5. Antenne plane à large bande selon l'une des revendications 1 à 4, dans laquelle un dispositif de blindage est installé entre l'élément (7) d'adaptation d'impédance et le dispositif d'antenne (2, 3, 4).
  6. Antenne plane à large bande selon l'une des revendications 1 à 5, dans laquelle l'élément (7) d'adaptation d'impédance et le dispositif d'antenne (2, 3, 4) sont disposés sur des côtés opposés du support (1).
  7. Antenne plane à large bande selon l'une des revendications 1 à 6, dans laquelle les formes elliptiques sont approchées par des formes polygonales.
EP05779855A 2004-11-09 2005-09-09 Antenne a large bande planaire Expired - Fee Related EP1812988B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004054015A DE102004054015A1 (de) 2004-11-09 2004-11-09 Planare Breitbandantenne
PCT/EP2005/054492 WO2006051010A2 (fr) 2004-11-09 2005-09-09 Antenne a large bande planaire

Publications (2)

Publication Number Publication Date
EP1812988A2 EP1812988A2 (fr) 2007-08-01
EP1812988B1 true EP1812988B1 (fr) 2009-11-11

Family

ID=35064748

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05779855A Expired - Fee Related EP1812988B1 (fr) 2004-11-09 2005-09-09 Antenne a large bande planaire

Country Status (5)

Country Link
US (1) US7847751B2 (fr)
EP (1) EP1812988B1 (fr)
JP (1) JP4518514B2 (fr)
DE (2) DE102004054015A1 (fr)
WO (1) WO2006051010A2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1986270A4 (fr) * 2006-02-08 2009-04-29 Nec Corp Composant d'antenne et appareil de communication employant celui-ci
US7639201B2 (en) 2008-01-17 2009-12-29 University Of Massachusetts Ultra wideband loop antenna
CN102474012B (zh) * 2009-07-09 2014-07-16 株式会社村田制作所 天线
US10128568B1 (en) * 2016-12-19 2018-11-13 The United States Of America As Represented By Secretary Of The Navy Elliptical conical antenna apparatus and methods

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6040204B2 (ja) * 1980-04-05 1985-09-10 日本電信電話株式会社 ２共振マイクロストリップアンテナ
JPH03228407A (ja) * 1989-12-11 1991-10-09 Nec Corp アンテナおよび該アンテナを用いた携帯用無線機
JP2870940B2 (ja) 1990-03-01 1999-03-17 株式会社豊田中央研究所 車載アンテナ
JP3464277B2 (ja) 1994-06-20 2003-11-05 株式会社東芝 円偏波パッチアンテナ
JP3106895B2 (ja) * 1995-03-01 2000-11-06 松下電器産業株式会社 電磁放射測定装置
JP2000091834A (ja) * 1998-09-17 2000-03-31 Oi Electric Co Ltd ループアンテナ
DE19857191A1 (de) * 1998-12-11 2000-07-06 Bosch Gmbh Robert Halfloop-Antenne
JP3651594B2 (ja) * 2001-10-24 2005-05-25 日本電気株式会社 アンテナ素子
US6819287B2 (en) * 2002-03-15 2004-11-16 Centurion Wireless Technologies, Inc. Planar inverted-F antenna including a matching network having transmission line stubs and capacitor/inductor tank circuits
US7436360B2 (en) * 2002-04-19 2008-10-14 Skycross, Inc. Ultra-wide band monopole antenna
WO2004073112A1 (fr) 2003-02-14 2004-08-26 Huber + Suhner Ag Antenne monopolaire large bande

Also Published As

Publication number Publication date
WO2006051010A3 (fr) 2006-07-13
JP4518514B2 (ja) 2010-08-04
JP2008519516A (ja) 2008-06-05
EP1812988A2 (fr) 2007-08-01
DE502005008508D1 (de) 2009-12-24
WO2006051010A2 (fr) 2006-05-18
US7847751B2 (en) 2010-12-07
DE102004054015A1 (de) 2006-05-11
US20080297430A1 (en) 2008-12-04

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