EP0439677A2 - Antenne de véhicule comportant une paroi conductrice avec une fente annulaire - Google Patents

Antenne de véhicule comportant une paroi conductrice avec une fente annulaire Download PDF

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Publication number
EP0439677A2
EP0439677A2 EP19900117742 EP90117742A EP0439677A2 EP 0439677 A2 EP0439677 A2 EP 0439677A2 EP 19900117742 EP19900117742 EP 19900117742 EP 90117742 A EP90117742 A EP 90117742A EP 0439677 A2 EP0439677 A2 EP 0439677A2
Authority
EP
European Patent Office
Prior art keywords
antenna
vehicle antenna
annular gap
vehicle
wall
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Withdrawn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
EP19900117742
Other languages
German (de)
English (en)
Other versions
EP0439677A3 (en
Inventor
Horst Dörrie
Uwe Dipl.-Ing. Militz
Heinrich Dipl.-Ing. Wilken
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 EP0439677A2 publication Critical patent/EP0439677A2/fr
Publication of EP0439677A3 publication Critical patent/EP0439677A3/de
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/10—Resonant slot antennas
    • H01Q13/18—Resonant slot antennas the slot being backed by, or formed in boundary wall of, a resonant cavity ; Open cavity antennas
    • 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
    • H01Q1/32—Adaptation for use in or on road or rail vehicles
    • H01Q1/325—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle
    • H01Q1/3275—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle mounted on a horizontal surface of the vehicle, e.g. on roof, hood, trunk
    • 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
    • H01Q9/0464—Annular ring patch

Definitions

  • the invention is based on a vehicle antenna according to the preamble of claim 1.
  • Such a vehicle antenna is known (US Pat. No. 3,611,388) which is based on a motor vehicle with a trunk lid made of insulating material. On the inside of the trunk lid, a first conductive film with a round hole and a second conductive film in the form of a circular disc, the diameter of which is slightly less than the diameter of the hole of the first film, is attached, so that an annular gap is formed.
  • a disadvantage of the known vehicle antenna is not only that it requires an insulating material wall, but also that it has a vertical directional diagram, which has a circle lying on either side of the Z axis. As a result, the antenna also picks up interference signals that are present below the antenna.
  • the invention has for its object to develop a vehicle antenna according to the preamble of claim 1 such that it has a vertical directional diagram, which, like the horizontal directional diagram, has the highest possible antenna gain and, however, a negligible antenna gain below the conductive wall or the antenna.
  • the object is achieved in a vehicle antenna according to the preamble of claim 1 by the features specified in the characterizing part of this claim.
  • the advantages that can be achieved by the invention are, in particular, that the antenna has a comparatively high antenna gain in the horizontal and vertical directions and that it does not respond to interfering signals on the underside of the antenna.
  • Advantageous further developments of the vehicle antenna result from the subclaims.
  • a preferred field of application of the invention is a motor vehicle antenna for the 900 MHz range.
  • 10 denotes a conductive wall, which is, for example, part of a roof of a motor vehicle.
  • the conductive wall 10 contains an annular gap 11.
  • the pot 13 contains a central opening 14 for introducing a coaxial antenna cable 15, the outer conductor 16 of which is conductively connected to the edge of the opening 14 and the inner conductor 17 of which is connected to a central feed point 18 of the annular gap 11.
  • the annular gap 11 is, for example, filled with a dielectric material or, in particular, sealed upwards by an insulating film. In Fig. 1, the field distribution in the annular gap 11 is shown with E.
  • X, Y and Z denote the three coordinates and ⁇ that of the Y coordinate and ⁇ the angle associated with the Z coordinate.
  • a horizontal directional diagram of the vehicle antenna according to FIGS. 1 and 2 shown in FIG. 4 is circular.
  • a vertical directional diagram of the vehicle antenna shown in FIG. 5 has a semicircle K1, K2 on either side of the Z coordinate.
  • the dimensions of the annular gap 11 and the pot 13 and the position of the feed point for the antenna cable 15 are shown in FIGS. 6 and 7.
  • the inner diameter d of the annular gap 11 is approximately ⁇ / 2, where ⁇ is the average operating wavelength of the vehicle antenna.
  • the thickness ⁇ r of the annular gap 11 is approximately 1 / 100 ⁇ .
  • the pot 13 has a height of about 1 / 30 ⁇ and a diameter D of about 3 / 4 ⁇ .
  • the adaptation of the vehicle antenna essentially depends on the diameter D of the pot 13 and on the dielectric constant ⁇ of the medium filling the annular gap 11. Since the feed takes place in the middle of the annular gap 11, the annular gap is supplied with an excitation voltage that is the same in phase and amount.
  • a rotationally symmetrical electromagnetic field is formed, the magnetic field lines running in a circle around the Z axis and the electrical field lines in the radial plane to the Z axis.
  • the annular gap diameter is dimensioned so that it corresponds to approximately half the operating wavelength ⁇

Landscapes

  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Details Of Aerials (AREA)
  • Support Of Aerials (AREA)
EP19900117742 1990-02-01 1990-09-14 Vehicle antenna comprising a conductrice wall with a circular slot Withdrawn EP0439677A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4002899 1990-02-01
DE19904002899 DE4002899A1 (de) 1990-02-01 1990-02-01 Fahrzeugantenne aus einer elektrisch leitenden wand mit einem ringspalt

Publications (2)

Publication Number Publication Date
EP0439677A2 true EP0439677A2 (fr) 1991-08-07
EP0439677A3 EP0439677A3 (en) 1991-09-11

Family

ID=6399177

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900117742 Withdrawn EP0439677A3 (en) 1990-02-01 1990-09-14 Vehicle antenna comprising a conductrice wall with a circular slot

Country Status (3)

Country Link
EP (1) EP0439677A3 (fr)
JP (1) JPH057105A (fr)
DE (1) DE4002899A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1033782A2 (fr) * 1999-03-02 2000-09-06 Matsushita Electric Industrial Co., Ltd. Antenne monopole
EP1198028A1 (fr) * 2000-10-13 2002-04-17 Matsushita Electric Industrial Co., Ltd. Antenne fente à cavité mince alimentée par conducteur ayant un circuit d'alimentation à selection de fréquence pour une adaption de l'antenne sur deux fréquences de résonance
EP1793451A1 (fr) * 2005-12-02 2007-06-06 M/A-Com, Inc. Antenne à plaque compacte à large bande
EP2296227A3 (fr) * 2009-09-10 2011-06-29 Delphi Delco Electronics Europe GmbH Antenne pour la réception de signaux satellite circulaires polarisés
EP2424036A3 (fr) * 2010-08-31 2012-06-06 Delphi Delco Electronics Europe GmbH Antenne de réception pour signaux radio par satellite polarisés circulaires
EP2654125A1 (fr) * 2012-04-19 2013-10-23 EADS Deutschland GmbH Antenne à fente annulaire

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001156533A (ja) * 1999-11-29 2001-06-08 Aisin Seiki Co Ltd 車両用アンテナ装置
DE102012107291B4 (de) * 2012-08-08 2020-02-13 HARTING Stiftung & Co. KG RFID-Tag mit polarisationsunabhängiger Antenne

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2724772A (en) * 1950-05-10 1955-11-22 Decca Record Co Ltd Aircraft radio antennae
EP0174068A1 (fr) * 1984-07-09 1986-03-12 The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Antenne à microbandes
EP0278070A1 (fr) * 1986-12-23 1988-08-17 Ball Corporation Antenne à microbande circulaire pour voiture automobile

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4836583B1 (fr) * 1969-06-13 1973-11-06
DE2321374C2 (de) * 1973-04-27 1985-08-08 Wächtler, Maximilian, Dr., 2430 Sierksdorf Peilantenne nach dem Adcock-Prinzip

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2724772A (en) * 1950-05-10 1955-11-22 Decca Record Co Ltd Aircraft radio antennae
EP0174068A1 (fr) * 1984-07-09 1986-03-12 The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Antenne à microbandes
EP0278070A1 (fr) * 1986-12-23 1988-08-17 Ball Corporation Antenne à microbande circulaire pour voiture automobile

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
P.HONOLD 'Sekund{r-Radar' 1971 , SIEMENS AG , BERLIN UND M}NCHEN *

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1033782A2 (fr) * 1999-03-02 2000-09-06 Matsushita Electric Industrial Co., Ltd. Antenne monopole
EP1033782A3 (fr) * 1999-03-02 2003-08-06 Matsushita Electric Industrial Co., Ltd. Antenne monopole
EP1198028A1 (fr) * 2000-10-13 2002-04-17 Matsushita Electric Industrial Co., Ltd. Antenne fente à cavité mince alimentée par conducteur ayant un circuit d'alimentation à selection de fréquence pour une adaption de l'antenne sur deux fréquences de résonance
US6538618B2 (en) 2000-10-13 2003-03-25 Matsushita Electric Industrial Co., Ltd. Antenna
EP1793451A1 (fr) * 2005-12-02 2007-06-06 M/A-Com, Inc. Antenne à plaque compacte à large bande
US7636063B2 (en) 2005-12-02 2009-12-22 Eswarappa Channabasappa Compact broadband patch antenna
EP2296227A3 (fr) * 2009-09-10 2011-06-29 Delphi Delco Electronics Europe GmbH Antenne pour la réception de signaux satellite circulaires polarisés
US8599083B2 (en) 2009-09-10 2013-12-03 Delphi Delco Electronics Europe Gmbh Antenna for reception of circularly polarized satellite radio signals
US9287623B2 (en) 2009-09-10 2016-03-15 Delphi Deutschland Gmbh Antenna for reception of circularly polarized satellite radio signals
US9300047B2 (en) 2009-09-10 2016-03-29 Delphi Deutschland Gmbh Antenna for reception of circularly polarized satellite radio signals
EP2424036A3 (fr) * 2010-08-31 2012-06-06 Delphi Delco Electronics Europe GmbH Antenne de réception pour signaux radio par satellite polarisés circulaires
EP2592691A1 (fr) * 2010-08-31 2013-05-15 Delphi Delco Electronics Europe GmbH Antenne de réception pour signaux radio par satellite polarisés circulaires
US8643556B2 (en) 2010-08-31 2014-02-04 Delphi Delco Electronics Europe Gmbh Receiving aerial for circularly polarized radio signals
EP2654125A1 (fr) * 2012-04-19 2013-10-23 EADS Deutschland GmbH Antenne à fente annulaire
US9692137B2 (en) 2012-04-19 2017-06-27 Eads Deutschland Gmbh Annular slot antenna

Also Published As

Publication number Publication date
JPH057105A (ja) 1993-01-14
DE4002899A1 (de) 1991-08-08
EP0439677A3 (en) 1991-09-11

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