EP0403741B1 - Antenne fouet - Google Patents

Antenne fouet Download PDF

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Publication number
EP0403741B1
EP0403741B1 EP90105964A EP90105964A EP0403741B1 EP 0403741 B1 EP0403741 B1 EP 0403741B1 EP 90105964 A EP90105964 A EP 90105964A EP 90105964 A EP90105964 A EP 90105964A EP 0403741 B1 EP0403741 B1 EP 0403741B1
Authority
EP
European Patent Office
Prior art keywords
coil
rod
radio antenna
length
shaped radio
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 - Lifetime
Application number
EP90105964A
Other languages
German (de)
English (en)
Other versions
EP0403741A2 (fr
EP0403741A3 (fr
Inventor
Horst Dörrie
Uwe Dipl.-Ing. Militz
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 EP0403741A2 publication Critical patent/EP0403741A2/fr
Publication of EP0403741A3 publication Critical patent/EP0403741A3/fr
Application granted granted Critical
Publication of EP0403741B1 publication Critical patent/EP0403741B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/32—Vertical arrangement of element

Definitions

  • the invention is based on a rod-shaped radio antenna according to the preamble of claim 1.
  • Such a rod-shaped radio antenna is known e.g. from document US-A-4,375,642, which, however, has the disadvantage in the case of mounting which deviates from the vertical that its all-round characteristic is no longer circular, but that it has strong drops of up to 30 dB.
  • the invention has for its object to develop a rod-shaped radio antenna according to the preamble of claim 1 in such a way that a gain antenna is formed which has a circular antenna characteristic that is as uniform as possible even at an inclination angle of up to 40 ° with respect to the vertical.
  • a preferred field of application for the invention is a radio antenna for the radio network C of the Irish Bundespost, that is to say for a frequency range from 450 to 470 MHz.
  • 10 means a rod-shaped radio antenna with a flexible, electrically conductive spring element 11, which is preferably a plated-through coil spring.
  • the spring element is connected at one end to an elastic rod 12 made of dielectric material.
  • the elastic rod 12 carries a first coil SP1, which is electrically connected to the flexible spring element 11.
  • a first length L1 of the radio antenna 10 comprises the flexible spring element 11 and the first coil SP1.
  • the second coil SP2 is followed by a third coil SP3 within the second length L2, which is wound in the opposite manner to the second coil SP2 and is wound back and has a third length L3.
  • a fourth coil SP4 is connected to the third coil SP3, which is wound parallel to the second coil SP2 and in the same direction as this and also has a length L3.
  • the coils SP2 to SP4 are preferably wound from an uninterrupted piece of wire.
  • radiator part 13 which, for example, consists of a braid pushed onto the rod 12 and has a length L4.
  • the average operating wavelength of the radio range in question is designated by ⁇ .
  • the braid used as the radiator part 13 can optionally also be replaced by a conductive lacquer layer or a tubular film, preferably a copper film.
  • FIG. 3 shows the arrangement of the rod-shaped radio antenna 10 on a roof 14, for example for a motor vehicle body.
  • the radio antenna 10 is preferably detachably connected in a foot piece 15 firmly connected to the roof.
  • the angle ⁇ of the radio antenna 10 with respect to the vertical is preferably 0 to 40 °.

Landscapes

  • Details Of Aerials (AREA)
  • Support Of Aerials (AREA)

Claims (8)

  1. Antenne fouet constituée par un élément à ressort flexible, conduisant l'électricité et par un bâton élastique relié à celui-ci en un matériau diélectrique, qui porte des bobines reliées électriquement les unes aux autres, antenne fouet caractérisée en ce que l'élément à ressort flexible (11) et une première bobine (SP1) reliée électriquement à celui-ci présentent ensemble une longueur L1 qui est égale à λ/4, en ce qu'une deuxième bobine (SP2), reliée à la première bobine, ayant une longueur λ/4 est reliée à une troisième bobine (SP3) qui a une longueur λ/8, et qui est enroulée en sens contraire de la seconde bobine (SP2) et en marche arrière, en ce que la troisième bobine (SP3) est reliée à une quatrième bobine (SP4) qui a également une longueur λ/8, et qui est enroulée parallèlement à la deuxième bobine, et en ce qu'une partie émettrice de rayonnement (13) ayant une longueur 3/8 λ est raccordée à la quatrième bobine (SP4), λ étant la longueur moyenne des ondes de signaux de la zone hertzienne concernée.
  2. Antenne fouet en forme de bâton selon la revendication 1, caractérisée en ce que l'antenne fouet (10) est disposée sous un angle (α) compris entre 0 et 40° par rapport à la verticale.
  3. Antenne fouet en forme de bâton selon la revendication 1 ou 2, caractérisée en ce que la partie émettrice de rayonnement (13) est un treillis conducteur mis sur le bâton élastique (12).
  4. Antenne fouet en forme de bâton selon la revendication 1 ou 2, caractérisée en ce que la partie émettrice de rayonnement (13) est un vernis électriquement conducteur mis sur le bâton élastique (12).
  5. Antenne fouet en forme de bâton selon la revendication 1 ou 2, caractérisée en ce que la partie émettrice de rayonnement (13) est une feuille entourant le bâton élastique (12), électriquement conductrice.
  6. Antenne fouet en forme de bâton selon l'une des revendications 1 à 5, caractérisée en ce que le bâton élastique (12) est un bâton en fibres de verre qui se rétrécit de façon conique depuis le pied de l'antenne jusqu'à l'extrémité libre.
  7. Antenne fouet en forme de bâton selon l'une des revendications 1 à 6, caractérisée en ce que l'élément à ressort flexible (11) et toutes les bobines (SP1 à SP4) ainsi que la partie émettrice de rayonnement (13) sont entourés par une couche de matière isolante.
  8. Antenne fouet en forme de bâton selon la revendication 1, caractérisée en ce que les bobines allant de la deuxième à la quatrième (SP2 à SP4) consistent en un fil ininterrompu.
EP90105964A 1989-06-19 1990-03-29 Antenne fouet Expired - Lifetime EP0403741B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3919884A DE3919884C2 (de) 1989-06-19 1989-06-19 Stabförmige Funkantenne
DE3919884 1989-06-19

Publications (3)

Publication Number Publication Date
EP0403741A2 EP0403741A2 (fr) 1990-12-27
EP0403741A3 EP0403741A3 (fr) 1991-05-29
EP0403741B1 true EP0403741B1 (fr) 1994-06-01

Family

ID=6382985

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90105964A Expired - Lifetime EP0403741B1 (fr) 1989-06-19 1990-03-29 Antenne fouet

Country Status (5)

Country Link
US (1) US5061942A (fr)
EP (1) EP0403741B1 (fr)
AT (1) ATE106612T1 (fr)
DE (2) DE3919884C2 (fr)
DK (1) DK0403741T3 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5359340A (en) * 1992-09-30 1994-10-25 Fujitsu Limited Helical antenna for portable radio communication equipment
CA2117561C (fr) * 1993-01-29 1998-04-28 Paul John Moller Antenne pour circuit de radiocommunication et methode connexe
DE202005008338U1 (de) * 2005-05-24 2005-12-22 Fuba Automotive Gmbh & Co. Kg Antennenkonfiguration für den Rundfunkempfang in Kfz
RU2755589C1 (ru) * 2020-03-23 2021-09-17 Федеральное государственное казенное военное образовательное учреждение высшего образования "Военная академия войсковой противовоздушной обороны Вооруженных Сил Российской Федерации имени Маршала Советского Союза А.М. Василевского" Министерства обороны Российской Федерации Синфазная прямолинейная штыревая УКВ антенная решётка

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE864710C (de) * 1951-08-21 1953-01-26 Sihn Kg Wilhelm Jun Biegsame Stabantenne, insbesondere fuer Fahrzeuge
US3541554A (en) * 1967-10-09 1970-11-17 Coil Research L Tunable whip antenna
DE1905444A1 (de) * 1968-02-06 1970-09-03 Yoshie Ohkubo Antenne
DE2257352A1 (de) * 1972-11-22 1974-05-30 Kathrein Werke Kg Fahrzeugantenne
US4097867A (en) * 1975-09-23 1978-06-27 James Joseph Eroncig Helical antenna encased in fiberglass body
US4101898A (en) * 1976-07-26 1978-07-18 David Lee Ingram Base fed, top-loaded vertical whip antenna
US4161737A (en) * 1977-10-03 1979-07-17 Albright Eugene A Helical antenna
US4163981A (en) * 1978-03-27 1979-08-07 Wilson Thomas J Spring tunable helical whip antenna
US4490727A (en) * 1979-10-18 1984-12-25 Mobile Mark, Inc. Adjustable top loaded antenna
US4404564A (en) * 1980-01-09 1983-09-13 Wilson George P Attachment for antennas to improve reception and transmission
DE3036084A1 (de) * 1980-09-25 1982-04-29 Robert Bosch Gmbh, 7000 Stuttgart Stabantenne, insbesondere fuer ukw-rundfunkempfang
US4675687A (en) * 1986-01-22 1987-06-23 General Motors Corporation AM-FM cellular telephone multiband antenna for motor vehicle
DE8622412U1 (fr) * 1986-08-21 1986-11-20 Hummel, Peter, 7012 Fellbach, De

Also Published As

Publication number Publication date
DE59005882D1 (de) 1994-07-07
US5061942A (en) 1991-10-29
EP0403741A2 (fr) 1990-12-27
DE3919884A1 (de) 1990-12-20
DE3919884C2 (de) 1994-05-19
ATE106612T1 (de) 1994-06-15
DK0403741T3 (da) 1994-09-19
EP0403741A3 (fr) 1991-05-29

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