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EP0443088B1 - Antenne fouet pour au moins deux gammes de fréquences - Google Patents

Antenne fouet pour au moins deux gammes de fréquences Download PDF

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Publication number
EP0443088B1
EP0443088B1 EP90117741A EP90117741A EP0443088B1 EP 0443088 B1 EP0443088 B1 EP 0443088B1 EP 90117741 A EP90117741 A EP 90117741A EP 90117741 A EP90117741 A EP 90117741A EP 0443088 B1 EP0443088 B1 EP 0443088B1
Authority
EP
European Patent Office
Prior art keywords
bar
conductive
shaped radiator
radiator according
coverings
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
EP90117741A
Other languages
German (de)
English (en)
Other versions
EP0443088A2 (fr
EP0443088A3 (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 EP0443088A2 publication Critical patent/EP0443088A2/fr
Publication of EP0443088A3 publication Critical patent/EP0443088A3/de
Application granted granted Critical
Publication of EP0443088B1 publication Critical patent/EP0443088B1/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
    • 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

Definitions

  • the invention is based on a rod-shaped radiator according to the preamble of claim 1.
  • Such a radiator is known (DE 89 O8 175 U1), which is suitable for radio traffic and for radio reception (VHF, K, M, L), particularly in vehicles.
  • the known radiator has the disadvantage that its bandwidth is too small for certain applications of the radiator.
  • the invention has for its object to develop the rod-shaped radiator according to the preamble of claim 1 such that the bandwidth of the radiator increases both in the direction of higher and lower frequencies with little technical effort.
  • a preferred field of application for the rod-shaped radiator is a vehicle radio antenna, which is preferably also suitable for radio reception with a car radio.
  • Fig. 1 10 denotes a rod-shaped radiator for different frequency ranges, for example the radio range and the long, medium, short and ultra-short wave broadcasting 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 rod 11 has a length of approximately 3/2 ⁇ , where ⁇ is the average operating wavelength of the radio range in question.
  • a lower length range of the rod 11 has a length L1 of approximately ⁇ / 2 and carries a first thin, conductive coating 13.
  • a medium length range of the rod which also has a length L2 of approximately ⁇ / 2, carries a second thin, conductive coating 14. There is a distance a between the two conductive coverings 13 and 14, so that the coverings are insulated from one another.
  • an inner conductor end 23 of the inner conductor 12 emerges from the latter. It is bent around the end of the rod and connected to the first conductive coating 13 in a conductive manner, for example by soldering.
  • the conductive covering 13 can be guided around the lower end face of the rod 11 and the inner conductor end 23, which is shorter in this case, can reach through the end covering, be radially bent and conductively connected to the end covering.
  • the lower end of the rod is in a recess 15 of a threaded bolt 16, which is used to fasten the radiator to a foot piece connected to a wall, for example a vehicle body.
  • the entire length L of the radiator 10 comes into effect during radio reception.
  • radio traffic that takes place in a comparatively high frequency range for example between 450 ... 470 MHz, only the lower and upper part comes into effect.
  • rod 17 which tapers conically from the base point of the radiator and likewise carries two conductive coverings 18 and 19, as in the exemplary embodiment according to FIG. 1.
  • a cylindrical rod 20 is shown, which is provided in place of the pads 13, 14 of FIG. 1 with two conductive braids 21 and 22.
  • the conductive braids are pushed onto the rod 20, for example.
  • the foils and the tube parts are preferably made of copper and can be injected into the rod 27 during the manufacture of the radiator, so that the foils or tube parts do not protrude beyond the outer surface of the rod 27.
  • radiators shown in FIGS. 1 to 4 are covered, for example, with an insulating tube, which is preferably a shrink tube; see. the hose 28 shown shortened in FIG. 4.
  • an insulating tube which is preferably a shrink tube; see. the hose 28 shown shortened in FIG. 4.

Landscapes

  • Details Of Aerials (AREA)
  • Aerials With Secondary Devices (AREA)

Claims (7)

  1. Antenne fouet pour au moins deux plages de fréquences, comprenant une tige dont la longueur est sensiblement égale à 3/2 λ, en matière diélectrique, qui contient sur toute la longueur de la tige, un conducteur intérieur, s'étendant coaxialement, et qui est entouré dans sa zone intermédiaire par un revêtement conducteur, c'est-à-dire d'une longueur d'environ λ/2, λ étant la longueur d'onde moyenne de fonctionnement pour la plage des fréquences supérieures, antenne caractérisée en ce que la tige (11) porte en dessous du revêtement conducteur (14), un autre revêtement (13) également conducteur, ayant une longueur d'environ λ/2, les revêtements (13, 14) étant écartés d'une distance (a) et l'extrémité inférieure du conducteur intérieur (12) est reliée en conduction avec l'extrémité inférieure de l'autre revêtement (13).
  2. Antenne fouet selon la revendication 1, caractérisée en ce que les revêtements conducteurs (13, 14) sont en résine conductrice.
  3. Antenne fouet selon la revendication 1, caractérisée en ce que les revêtements conducteurs sont des treillis conducteurs d'électricité (21, 22).
  4. Antenne fouet selon la revendication 1, caractérisée en ce que les revêtements conducteurs sont des feuilles conductrices ou des éléments tubulaires à paroi mince (25, 26).
  5. Antenne fouet selon l'une des revendications 1 à 4, caractérisée en ce que le conducteur intérieur (12) de la tige (11) sort par son extrémité inférieure et est relié de manière conductrice à l'autre revêtement (13).
  6. Antenne fouet selon la revendication 5, caractérisée en ce que l'extrémité inférieure de la tige (11) est fixée dans une cavité (15) d'un goujon (16).
  7. Antenne fouet selon l'une des revendications 1 à 5, caractérisée en ce que la tige (11), y compris les revêtements conducteurs (13, 14), sont revêtus d'un tube isolant (28).
EP90117741A 1990-02-21 1990-09-14 Antenne fouet pour au moins deux gammes de fréquences Expired - Lifetime EP0443088B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9002022U DE9002022U1 (de) 1990-02-21 1990-02-21 Stabförmiger Strahler für mindestens zwei Frequenzbereiche
DE9002022U 1990-02-21

Publications (3)

Publication Number Publication Date
EP0443088A2 EP0443088A2 (fr) 1991-08-28
EP0443088A3 EP0443088A3 (en) 1991-09-11
EP0443088B1 true EP0443088B1 (fr) 1994-12-07

Family

ID=6851223

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90117741A Expired - Lifetime EP0443088B1 (fr) 1990-02-21 1990-09-14 Antenne fouet pour au moins deux gammes de fréquences

Country Status (3)

Country Link
EP (1) EP0443088B1 (fr)
DE (2) DE9002022U1 (fr)
DK (1) DK0443088T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2702598B1 (fr) * 1993-03-12 1995-06-16 Rayan Antenne a bas profil pour equipement radio embarque a frequences multiples.
WO1999066590A1 (fr) * 1998-06-17 1999-12-23 Young Joon Kim Antenne pour systemes de communication mobile
FI112981B (fi) 1999-07-08 2004-02-13 Filtronic Lk Oy Monitaajuusantenni

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2493514A (en) * 1945-12-22 1950-01-03 Rca Corp Multiply-resonant stub antenna
US4509056A (en) * 1982-11-24 1985-04-02 George Ploussios Multi-frequency antenna employing tuned sleeve chokes
US4748450A (en) * 1986-07-03 1988-05-31 American Telephone And Telegraph Company, At&T Bell Laboratories Vehicular multiband antenna feedline coupling device
US4725846A (en) * 1986-12-12 1988-02-16 Western Mobile Communications, Inc. Disguise antenna operating in the cellular band
DE8908175U1 (de) * 1989-06-19 1989-08-31 Robert Bosch Gmbh, 70469 Stuttgart Stabförmiger Strahler für zwei Frequenzbereiche
DE8909175U1 (de) * 1989-07-28 1989-09-14 Klever, Hans, 5207 Ruppichteroth Vorrichtung zum Auf- und Abplanen von Lastkraftwagen

Also Published As

Publication number Publication date
DE59007938D1 (de) 1995-01-19
EP0443088A2 (fr) 1991-08-28
EP0443088A3 (en) 1991-09-11
DE9002022U1 (de) 1990-04-26
DK0443088T3 (da) 1995-05-01

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