EP0406564B1 - Antenne fouet pour deux gammes de fréquences - Google Patents

Antenne fouet pour deux gammes de fréquences Download PDF

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Publication number
EP0406564B1
EP0406564B1 EP90110326A EP90110326A EP0406564B1 EP 0406564 B1 EP0406564 B1 EP 0406564B1 EP 90110326 A EP90110326 A EP 90110326A EP 90110326 A EP90110326 A EP 90110326A EP 0406564 B1 EP0406564 B1 EP 0406564B1
Authority
EP
European Patent Office
Prior art keywords
bar
rod
antenna
type antenna
conductive
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
EP90110326A
Other languages
German (de)
English (en)
Other versions
EP0406564A3 (en
EP0406564A2 (fr
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
Priority claimed from DE3922042A external-priority patent/DE3922042A1/de
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0406564A2 publication Critical patent/EP0406564A2/fr
Publication of EP0406564A3 publication Critical patent/EP0406564A3/de
Application granted granted Critical
Publication of EP0406564B1 publication Critical patent/EP0406564B1/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
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/40—Radiating elements coated with or embedded in protective material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
    • 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

Definitions

  • the invention is based on a radiator according to the preamble of claim 1.
  • Such a radiator is known which is suitable for radio traffic and for radio reception (VHF, K, M, L).
  • the known radiator has the disadvantage that its base point must be conductively connected to ground via a foot piece, that is to say to the body of a motor vehicle. Therefore, the known radiator is not suitable for the so-called one-button technique, in which the radiator is attached isolated from the ground.
  • Another disadvantage of the known radiator is that it has a metal tube surrounding the relatively thin, rod-shaped radiator, which is insulated from the rod-shaped radiator by insulating material parts, at about half its length.
  • the invention has for its object to develop the rod-shaped radiator according to the preamble of claim 1 such that the radiator does not have to be connected to ground at its base and that it can be manufactured with the same diameter over its entire length.
  • the rod-shaped radiator forming a gain antenna has a high-impedance base point in the higher of the two frequency ranges, that is, preferably a radio range of 450 MHz, so that assembly using single-button technology is possible.
  • the radiator has a uniform thickness over its entire length, which simplifies the manufacture of the radiator, and that additional insulating material parts can be dispensed with.
  • a preferred area of application for the rod-shaped radiator is a vehicle radio antenna, which is also suitable for radio reception.
  • 10 denotes a rod-shaped radiator for two different frequency ranges, for example the radio range and the radio range.
  • the radiator comprises a cylindrical rod 11 made of a dielectric material, preferably of glass fiber, which contains a coaxial inner conductor 12 which extends over the entire length of the radiator.
  • the inner conductor 12 emerges at the lower end of the rod 11.
  • the entire length L 3/2 ⁇ of the radiator 10 comes into effect during radio reception.
  • L1 ⁇ / 2 long range of the radiator 10 comes into effect, which is high-resistance in this range and therefore does not have a ground connection needed.
  • rod 15 which tapers conically from the base point of the radiator and, as in the exemplary embodiment according to FIG. 1, likewise carries a conductive coating 16 in its central region.
  • a cylindrical rod 20 which carries a conductive braid 21 in the central region of the length L2.
  • the conductive braid is pushed onto the rod 20, for example.
  • the 1 can also be formed by a conductive film or a thin-walled tube part 25 (cf. FIG. 4).
  • the film and the thin-walled tube part 25 are preferably made of copper and can be injected into the rod 26 during the manufacture of the radiator, so that the film or the tube part does not protrude beyond the outer surface of the rod 26.
  • radiators shown in FIGS. 1 to 4 are covered, for example, with an insulating tube, which is preferably a shrink tube; see. the hose 27 shown shortened in FIG. 4.
  • an insulating tube which is preferably a shrink tube; see. the hose 27 shown shortened in FIG. 4.

Landscapes

  • Details Of Aerials (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Electrotherapy Devices (AREA)
  • General Induction Heating (AREA)
  • Amplifiers (AREA)

Claims (7)

  1. Antenne en forme de fouet pour deux gammes de fréquence avec un conducteur qui est entouré, sur une partie de sa longueur, par un conducteur creux coaxial, isolé par rapport au premier conducteur, antenne en forme de fouet caractérisée en ce qu'un fouet de longueur L = 3 2 λ
    Figure imgb0001
     (11) en un matériau diélectrique contient un conducteur intérieur coaxial (12) s'étendant sur toute la longueur du fouet, en ce que le fouet est entouré dans sa zone moyenne de longueur L₂ = λ/2 par une couche conductrice (13) et en ce que λ est la longueur d'onde moyenne de fonctionnement de la gamme de fréquence la plus élevée.
  2. Antenne en forme de fouet selon la revendication 1, caractérisée en ce que la couche conductrice (13) consiste en un vernis conducteur.
  3. Antenne en forme de fouet selon la revendication 1, caractérisée en ce que la couche conductrice (13) est une tresse électriquement conductible (21).
  4. Antenne en forme de fouet selon la revendication 1, caractérisée en ce que la couche conductrice (13) est une feuille conductrice ou un élément de tube à paroi mince (25).
  5. Antenne en forme de fouet selon l'une des revendications 1 à 4, caractérisée en ce que le fouet (11) est un fouet en fibres de verre.
  6. Antenne en forme de fouet selon l'une des revendications 1 à 5, caractérisée en ce que le fouet (15) se rétrécit de façon conique en direction de son extrémité libre.
  7. Antenne en forme de fouet selon l'une des revendications 1 à 6, caractérisée en ce que le fouet 11 est revêtu, y compris la couche conductrice (13) d'un tuyau en matériau isolant (27).
EP90110326A 1989-07-05 1990-05-31 Antenne fouet pour deux gammes de fréquences Expired - Lifetime EP0406564B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3922042 1989-07-05
DE3922042A DE3922042A1 (de) 1989-06-19 1989-07-05 Stabfoermiger strahler fuer zwei frequenzbereiche

Publications (3)

Publication Number Publication Date
EP0406564A2 EP0406564A2 (fr) 1991-01-09
EP0406564A3 EP0406564A3 (en) 1991-09-25
EP0406564B1 true EP0406564B1 (fr) 1994-11-30

Family

ID=6384315

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90110326A Expired - Lifetime EP0406564B1 (fr) 1989-07-05 1990-05-31 Antenne fouet pour deux gammes de fréquences

Country Status (5)

Country Link
EP (1) EP0406564B1 (fr)
JP (1) JP3171843B2 (fr)
AT (1) ATE114876T1 (fr)
DE (1) DE59007811D1 (fr)
DK (1) DK0406564T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE507640C2 (sv) 1992-03-19 1998-06-29 Telia Ab Anordning vid antennarrangemang
US6756552B2 (en) 2001-02-23 2004-06-29 Agilent Technologies, Inc. Multi-pole conductive liquid-based switch device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1547136A (en) * 1978-02-07 1979-06-06 Marconi Co Ltd Radio antennae
US4229743A (en) * 1978-09-22 1980-10-21 Shakespeare Company Multiple band, multiple resonant frequency antenna
US4491850A (en) * 1981-07-20 1985-01-01 David Cutler Antenna formed of series of metallic and non-metallic conductive sections

Also Published As

Publication number Publication date
DE59007811D1 (de) 1995-01-12
EP0406564A3 (en) 1991-09-25
JP3171843B2 (ja) 2001-06-04
JPH0344101A (ja) 1991-02-26
DK0406564T3 (da) 1995-05-01
ATE114876T1 (de) 1994-12-15
EP0406564A2 (fr) 1991-01-09

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