EP0580590B1 - Systeme d'antennes - Google Patents

Systeme d'antennes Download PDF

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Publication number
EP0580590B1
EP0580590B1 EP92904728A EP92904728A EP0580590B1 EP 0580590 B1 EP0580590 B1 EP 0580590B1 EP 92904728 A EP92904728 A EP 92904728A EP 92904728 A EP92904728 A EP 92904728A EP 0580590 B1 EP0580590 B1 EP 0580590B1
Authority
EP
European Patent Office
Prior art keywords
antenna
accordance
reception
arrangement
antenna arrangement
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
EP92904728A
Other languages
German (de)
English (en)
Other versions
EP0580590A1 (fr
Inventor
Dieter Schenkyr
Stefan Hamerli
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.)
Hirschmann Electronics GmbH and Co KG
Original Assignee
Hirschmann Electronics GmbH and Co KG
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 Hirschmann Electronics GmbH and Co KG filed Critical Hirschmann Electronics GmbH and Co KG
Publication of EP0580590A1 publication Critical patent/EP0580590A1/fr
Application granted granted Critical
Publication of EP0580590B1 publication Critical patent/EP0580590B1/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
    • H01Q1/27—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
    • H01Q1/3283—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle side-mounted antennas, e.g. bumper-mounted, door-mounted
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles

Definitions

  • the invention relates to an antenna arrangement with a first antenna for receiving signals in the first frequency band and a second antenna for receiving signals in the second frequency band with a polarization direction different from the wave field of the first frequency band.
  • An antenna arrangement is known from EP-A-0 383 017, in which at least two individual probes are provided.
  • one of the two individual probes as an active antenna for long, medium and / or Use shortwave (LMK) reception and, if necessary, adapt it to be able to use the antenna provided for VHF reception with two individual probes for LMK reception.
  • LMK Use shortwave
  • a capacitive separation of one of the individual antennas from the rest of the antenna arrangement is required.
  • the capacitive separation means that both FM and LMK reception are not optimal.
  • compromises would have to be made regarding the alignment of the individual antennas in relation to the vertically and horizontally polarized wave fields, which would adversely affect the efficiency of both FM and LMK reception.
  • the invention is therefore based on the object of specifying an antenna arrangement which enables optimum reception quality for the reception of signals in different frequency bands and with wave fields polarized in different directions.
  • the first antenna for receiving signals in the first frequency band has at least two individual probes, which couple to the displacement current of the same, essentially resonant circuit occurring on a conductive structure.
  • the antenna arrangement according to the invention enables optimal reception of signals in both frequency bands and with differently polarized wave fields, without having to compromise on the level of efficiency.
  • the first antenna is preferably used for receiving essentially horizontally polarized wave fields and the second antenna for receiving essentially vertically polarized wave fields.
  • This additional measure enables a further optimal adaptation of the antennas to the reception of differently polarized wave fields without considering compromises. This further improves the reception properties of the antennas.
  • the efficiency of the second antenna is additionally improved in that the second antenna is arranged orthogonally to a horizontal outer edge of the conductive structure.
  • the edge effect with a compression of the field lines can also be used in this way to improve the reception properties of the second antenna.
  • the second antenna is arranged between the individual probes of the first antenna and in particular in the middle between the individual probes of the first antenna.
  • the first antenna is or is provided with the at least two individual probes for reception in the VHF frequency range and the second antenna for reception in the LMK frequency range.
  • the antenna arrangement according to the invention can be used particularly advantageously in connection with mobile reception.
  • the conductive structure on which an essentially resonant circuit occurs is or are preferably the metal body or electrically conductive parts of a motor vehicle.
  • the individual probes of the first antenna and / or the second antenna can preferably be short antennas with respect to the received wavelength, which enable a compact arrangement, in particular with regard to integrated antenna arrangements for mobile reception. Furthermore, it is advantageous if the first and / or the second antenna is an active antenna.
  • Another advantageous embodiment of the invention consists in interconnecting the signals received in the two frequency bands behind the active antenna elements. This also makes it possible to decouple the two antennas and to avoid a separating capacitance with its harmful effect on VHF and / or LMK reception.
  • the first and second antennas may preferably be in a plastic bumper on the bow or rear of the vehicle, however can also be integrated in a spoiler on the rear of the vehicle or on the vehicle roof.
  • the antenna arrangement according to the invention can advantageously be used in connection with a diversity reception system, since the first and second antennas are decoupled and can be optimally designed for differently polarized wave fields.
  • a first antenna has antenna probes 1, 2 with roof capacitances 3, 4, a ⁇ / 2 line 5 connecting the antenna probes 1 and 2, which is arranged as a detour line near a body panel 6 at ground potential, and extension inductors 7, 8 in the form of Spools on.
  • the individual antennas of the first antenna are not necessary, but are preferably short antennas with respect to the received wavelength, that is to say probes, they are therefore also referred to as antenna probes.
  • the antenna probes 1, 2 are essentially orthogonal to the body edge.
  • One of the two axes that spans the areas of the roof capacities 3, 4 is essentially parallel to the body edge.
  • the normal vector of this surface is thus orthogonal to the body edge and points in the direction of the extended antenna.
  • the antenna signal is amplified in an amplifier 9 and fed via a coaxial cable 10 to a receiving circuit, not shown.
  • a receiving circuit not shown.
  • FIG. 2 An equivalent circuit diagram is shown in FIG. 2, the antenna and circuit elements which correspond to those in FIG. 1 being provided with the same reference symbols and should not be explained again.
  • an antenna probe for example antenna probe 2
  • This separation capacitance which is shown schematically in FIG. 2 and provided with the reference number 11, causes an asymmetry in the first antenna arrangement provided for VHF reception with the two antenna probes 1 and 2.
  • the reception or antenna elements are therefore separately provided for FM and LMK reception, so that the FM and LMK reception components are separated and thus a mutual negative influence on the FM and LMK reception arrangement or avoiding unsatisfactory compromises.
  • an additional antenna 14 with a roof capacitance 15 connected to the amplifier 9 is provided (cf. FIG. 1).
  • the arrangement according to the invention also has the following advantages:
  • Fig. 1 the horizontal polarization direction of the FM wave field is indicated by the arrow E FM , and with an arrow orthogonal to the horizontal direction of the FM wave field, the vertical polarization direction of the LMK wave field E LMK is shown schematically.
  • the horizontal arrangement of the first antenna consisting of antenna probes 1 and 2 has an optimal coupling to the electrical field vector of the horizontally polarized VHF wave field. If the first antenna with antenna probes 1 and 2 were therefore also used to receive the LMK wave field, the efficiency would be very low, since the first antenna with antenna probes 1 and 2 only has a small component to it would couple the vertical e-field vector of the LMK wave field.
  • the first antenna with antenna probes 1 and 2 in such a way that the LMK wave field could be received better. In any case, however, compromises would have to be made with regard to the arrangement of the antennas, so that both FM and LMK reception are unsatisfactory.
  • the first antenna i. H.
  • the antenna probes 1 and 2 can be optimally arranged on vertical edges of the vehicle, for example on vertical edges of the rear of the vehicle or the front of the vehicle when using, for example, a bumper antenna in order to achieve good efficiency for VHF reception.
  • the antenna probes 1 and 2 of the first antenna for VHF reception are therefore located at the greatest field strength of the displacement current of the resonant body excitation due to the horizontally polarized VHF wave field.
  • the second antenna 14 for the LMK reception is in particular oriented orthogonally to a vehicle edge.
  • the second antenna 14 for the LMK reception is in the Middle between the individual probes 1 and 2 of the first antenna intended for VHF reception, namely at a short distance or a small antenna height ( ⁇ ⁇ at 100 MHz) in front of the conductive body surface.
  • the second antenna 14 provided for the LMK reception therefore optimally couples to the displacement current between the electrically conductive body 6 and the ground 18, preferably to a horizontal edge of the motor vehicle.
  • the horizontally polarized VHF wave field in this arrangement of the second antenna 14 provided for LMK reception has very small field strengths, so that the second antenna probe 14 provided for LMK reception has the function of the first one for VHF reception provided antenna with the antenna probes 1 and 2 is not affected.
  • the antenna arrangement according to the invention and the alignment and arrangement of the first and second antennas for VHF and LMK reception enables extensive electrical decoupling of these first and second antennas because the VHF and LMK wave fields which are polarized orthogonally to one another as well as the resonant excitation of the Vehicle body is optimally used for the VHF frequencies.
  • the roof capacitance 15 of the LMK antenna probe is designed with approximately three times the area of the roof capacitance 3 or 4 of an FM antenna probe 1 or 2.
  • the invention and its advantages were explained using the exemplary embodiment of a bumper antenna.
  • all antenna elements and Components of the antenna arrangement according to the invention can be foamed in a foam core 17, or a dielectric can be used to increase the roof capacities 3 and 4 of the first antenna provided for VHF reception.
  • the second antenna 14 intended for LMK reception is mounted orthogonally to an upper horizontal body edge.

Landscapes

  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Details Of Aerials (AREA)

Abstract

Pour optimiser la réception de signaux dans au moins deux bandes de fréquences dont les champs d'ondes présentent des polarisations différentes, une première antenne présente, pour la réception de signaux dans une première bande de fréquences, deux sondes (1, 2) qui se couplent sur le courant de déplacement du même circuit, essentiellement résonant, établi sur un élément conducteur (6). Une deuxième antenne (14) est prévue pour la réception de signaux dans une deuxième bande de fréquences qui présente un champ d'ondes dont le sens de polarisation est perpendiculaire au champ d'ondes des signaux dans l'autre bande de fréquences. Le découplement des deux antennes ainsi produit permet une sélection optimum des composantes des antennes et un positionnement et une orientation optimums des antennes pour une réception avec des rendements élevés dans les différentes bandes de fréquences, en particulier dans les bandes des ondes métriques et les bandes des ondes longues, moyennes et courtes.

Claims (19)

  1. Système d'antennes comportant une première antenne (1, 2) pour la réception de signaux dans une première bande de fréquence et une deuxième antenne (14) pour la réception de signaux dans une deuxième bande de fréquence avec une direction de polarisation différente par rapport aux champs d'ondes de la première bande de fréquence, caractérisé en ce que la première antenne présente au moins deux sondes individuelles (1, 2) qui constituent un couplage pour le courant de décalage du même circuit électrique, pratiquement résonant, constitué sur une structure conductrice (6).
  2. Système d'antennes selon la revendication 1, caractérisé en ce que la première antenne est prévue pour la réception de champs d'ondes polarisés pratiquement horizontalement et la deuxième antenne (14) est prévue pour la réception de champs d'ondes polarisés pratiquement verticalement.
  3. Système d'antennes selon la revendication 1 ou 2, caractérisé en ce que les sondes individuelles (1, 2) de la première antenne sont disposées perpendiculairement par rapport aux arêtes verticales de la structure conductrice (6).
  4. Système d'antennes selon l'une des revendications précédentes, caractérisé en ce que la deuxième antenne (14) est disposée perpendiculairement par rapport à une arête extérieure horizontale de la structure conductrice (6).
  5. Système d'antennes selon l'une des revendications précédentes caractérisé en ce que la deuxième antenne (14) est disposée entre les sondes individuelles (1, 2) de la première antenne.
  6. Système d'antennes selon la revendication 5, caractérisé en ce que la deuxième antenne (14) est disposée au milieu entre les sondes individuelles (1, 2) de la première antenne.
  7. Système d'antennes selon l'une des revendications précédentes, caractérisé en ce que les sondes individuelles (1, 2) de la première antenne sont reliées ensemble par l'intermédiaire d'un conducteur λ/2.
  8. Système d'antennes selon l'une des revendications précédentes, caractérisé en ce que la première antenne est prévue pour la réception de signaux dans la bande de fréquence ultracourte (UKW) (modulation de fréquence) la deuxième antenne (14) pour la réception de signaux dans la bande de fréquence d'ondes courtes, moyennes et longues (LMK).
  9. Système d'antennes selon l'une des revendications précédentes, caractérisé en ce que la structure conductrice (6) est constituant de la carrosserie métallique ou des parties conductrices de l'électricité d'un véhicule.
  10. Système d'antennes selon l'une des revendications précédentes, caractérisé en ce que les sondes individuelles (1, 2) de la première antenne et/ou la deuxième antenne (14) sont des antennes courtes par rapport à la longueur d'onde captée.
  11. Système d'antennes selon l'une des revendications précédentes, caractérisé en ce que les sondes individuelles (1, 2) de la première antenne et/ou la deuxième antenne (14) présentent des capacités de toit (3, 4; 15).
  12. Système d'antennes selon la revendication 11, caractérisé en ce que la capacité de toit (15) de la deuxième antenne (14) à peu près une surface triple de la capacité de toit (3 ou 4) de l'une des sondes individuelles (1, 2) de la première antenne.
  13. Système d'antennes selon l'une des revendications précédentes, caractérisé en ce que les sondes individuelles (1, 2) de la première antenne et/ou la deuxième antenne (14) ont des inductivités de prolongement (7, 8).
  14. Système d'antennes selon l'une des revendications précédentes, caractérisé en ce que des diélectriques sont prévus pour augmenter les capacités de toit.
  15. Système d'antennes selon l'une des revendications précédentes, caractérisé en ce que la première et/ou la deuxième antenne est une antenne active.
  16. Système d'antennes selon l'une des revendications précédentes, caractérisé en ce que les signaux captés dans les deux bandes de fréquences sont couplés ensemble en aval des éléments d'antennes actifs.
  17. Système d'antennes selon l'une des revendications précédentes caractérisé en ce que la première et/ou la deuxième antenne est/sont intégrée(s) dans un pare-chocs (16).
  18. Système d'antennes selon l'une des revendications 1 à 15, caractérisé en ce que la première et/ou la deuxième antennes est/sont intégrée(s) dans un aileron déflecteur disposé à l'arrière du véhicule ou sur le toit du véhicule.
  19. Système d'antennes selon l'une des revendications précédentes, caractérisé en ce qu'il fait partie d'un système de réception à diversité.
EP92904728A 1991-05-17 1992-02-20 Systeme d'antennes Expired - Lifetime EP0580590B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4116232 1991-05-17
DE19914116232 DE4116232A1 (de) 1991-05-17 1991-05-17 Antennenanordnung
PCT/EP1992/000360 WO1992021160A1 (fr) 1991-05-17 1992-02-20 Systeme d'antennes

Publications (2)

Publication Number Publication Date
EP0580590A1 EP0580590A1 (fr) 1994-02-02
EP0580590B1 true EP0580590B1 (fr) 1996-02-07

Family

ID=6431922

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92904728A Expired - Lifetime EP0580590B1 (fr) 1991-05-17 1992-02-20 Systeme d'antennes

Country Status (4)

Country Link
EP (1) EP0580590B1 (fr)
JP (1) JPH06511604A (fr)
DE (2) DE4116232A1 (fr)
WO (1) WO1992021160A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002023668A1 (fr) * 2000-09-12 2002-03-21 Robert Bosch Gmbh Ensemble pare-chocs avec antenne

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19636477C2 (de) * 1996-09-07 1999-11-25 Hirschmann Richard Gmbh Co Fahrzeugantenneneinrichtung
DE19729972A1 (de) * 1997-07-12 1999-01-14 Menzolit Fibron Gmbh Faserverstärktes Kunststoff-Formteil mit integrierter Antenne
ATE362202T1 (de) * 1997-01-15 2007-06-15 Menzolit Fibron Gmbh Faserverstärktes kunststoff-formteil mit integrierter antenne
DE19962736C2 (de) * 1999-12-23 2001-11-22 Hirschmann Electronics Gmbh Fahrzeugantenne
FR2884471B1 (fr) * 2005-04-18 2007-07-20 Plastic Omnium Cie Piece de renfort pour vehicule automobile et utilisation d'une telle piece comme antenne
US7425925B2 (en) 2006-02-27 2008-09-16 Nissan Technical Center North America, Inc. Vehicle security system
US7234741B1 (en) 2006-03-07 2007-06-26 Nissan Technical Center North America, Inc. Vehicle bumper assembly

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US3977004A (en) * 1975-06-16 1976-08-24 The United States Of America As Represented By The Secretary Of The Navy Aircraft VLF/LF/MF window antenna receiving system
FR2552587B1 (fr) * 1983-09-28 1986-04-18 Dassault Avions Antenne commutable pour les gammes de frequences vhf et uhf
US4823140A (en) * 1984-06-18 1989-04-18 Asahi Glass Company Ltd. Antenna device for a television receiver mounted on an automobile
US4845505A (en) * 1987-02-13 1989-07-04 Toyota Jidosha Kabushiki Kaisha Automobile antenna system for diversity reception
US4868577A (en) * 1987-12-23 1989-09-19 Wingard Jefferson C Multiband television/communications antenna
DE3802130A1 (de) * 1988-01-26 1989-08-03 Hirschmann Radiotechnik Antennensystem fuer den rundfunkempfang in kraftfahrzeugen
DE3802131A1 (de) * 1988-01-26 1989-08-03 Hirschmann Radiotechnik Antennensystem fuer den rundfunkempfang in kraftfahrzeugen
DE8901792U1 (fr) * 1989-02-16 1989-03-30 Blaupunkt-Werke Gmbh, 3200 Hildesheim, De
DE3907493A1 (de) * 1989-03-08 1990-09-20 Lindenmeier Heinz Scheibenantenne mit antennenverstaerker
DE3911178A1 (de) * 1989-04-06 1990-10-11 Lindenmeier Heinz Scheibenantennensystem mit antennenverstaerker
DE4003385C2 (de) * 1990-02-05 1996-03-28 Hirschmann Richard Gmbh Co Antennenanordnung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NTZ NACHRICHTECHNISCHE ZEITSCHRIFT. Bd. 27, Nr. 1, Januar 1974, BERLIN DE Seiten 17 - 23; LINDENMEIER: 'Wirkungsweise und Leistungsvermögen moderner Autoantennen'siehe Seite 17, Absatz 3.- Seite 18, Absatz 3.2 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002023668A1 (fr) * 2000-09-12 2002-03-21 Robert Bosch Gmbh Ensemble pare-chocs avec antenne
DE10044936A1 (de) * 2000-09-12 2002-04-04 Bosch Gmbh Robert Stossfängerantennenanordnung

Also Published As

Publication number Publication date
JPH06511604A (ja) 1994-12-22
DE4116232A1 (de) 1992-11-19
WO1992021160A1 (fr) 1992-11-26
EP0580590A1 (fr) 1994-02-02
DE59205310D1 (de) 1996-03-21

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