WO2000069021A1 - Systeme d'antenne de radiocommunications cache - Google Patents

Systeme d'antenne de radiocommunications cache Download PDF

Info

Publication number
WO2000069021A1
WO2000069021A1 PCT/GB2000/001547 GB0001547W WO0069021A1 WO 2000069021 A1 WO2000069021 A1 WO 2000069021A1 GB 0001547 W GB0001547 W GB 0001547W WO 0069021 A1 WO0069021 A1 WO 0069021A1
Authority
WO
WIPO (PCT)
Prior art keywords
slot
panel
antenna
antenna system
vehicle
Prior art date
Application number
PCT/GB2000/001547
Other languages
English (en)
Inventor
Ian Benjamin Hopley
Original Assignee
Asg Technology Limited
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 Asg Technology Limited filed Critical Asg Technology Limited
Priority to AU44197/00A priority Critical patent/AU4419700A/en
Publication of WO2000069021A1 publication Critical patent/WO2000069021A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/44—Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect
    • 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
    • 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

Definitions

  • the present invention relates to vehicle radio communication antenna systems.
  • One known such system operates in the range 425 MHz to 460 MHz (nominally 450 MHz)
  • a vehicle radio communication system comprising an electrically conductive panel
  • the panel adapted to be carried by or to form part of the structure of the vehicle, the panel having an elongate slot in it the effective length of which is an integral sub-multiple of the
  • the first connection characterised in that the feed cable connection to the slot is made in such a way that the feed line is non-resonant at the operating frequency and is
  • the slot in the panel may be in the form of a parallel sided slot, a dumb bell shaped slot, or an elongate notch cut into an edge of the panel. If the non-conductive region of the panel is in the form of a parallel sided slot then that slot may have a folded configuration.
  • Such linkage may be achieved, for example by positioning the leads to lie generally parallel to the length of the slot and between its
  • an electrically conductive non-magnetic element there may be provided an electrically conductive non-magnetic element
  • This element may span the slot and may be in the form of an
  • leads may be secured to the insulating panel on the side thereof remote from the
  • the radiation of signals inwardly of the vehicle may be prevented by providing an electrical screen which may be, for example, in the form of a conductive panel spaced from an attached to one surface of the electrically conductive panel
  • the antenna may be mounted so that the radiating region thereof is behind a non- conductive surface panel of the vehicle such as a non-metallic radiator grille or number
  • the slot antenna may be rendered invisible by filling with a non-metallic body filler of the type used for repairs to vehicle bodywork, which may be painted to match the rest of the vehicle This filler may be finished flush with the panel to provide
  • Figure 1 is a schematic front view of a slot antenna formed as an embodiment of the invention
  • Figure 2 is a front view of a slot antenna of alternative form to that of
  • Figure 1 sometimes referred to as a notch antenna
  • FIG. 3 is a schematic perspective view of the slot antenna system of
  • Figure 4 is a perspective view of the embodiment of the invention of Figure 3 seen from the opposite side,
  • Figure 5 is a perspective view of an alternative embodiment of the invention.
  • Figure 6 is a cross section through an embodiment of the invention having a screening enclosure
  • Figure 7 a front view of a further embodiment of the invention.
  • Figure 8 illustrates the mounting of a slot antenna in a motor vehicle body panel
  • Figure 9 illustrates the mounting of a slot antenna in a wind deflector attached
  • the wave consists of a parallel sided slot 2 cut into a sheet 3 of copper or other material of high electrical conductivity
  • the length of the slot 2 is equal to approximately half the wavelength of the electromagnetic radiation with which the antenna is to be used
  • the radiation has a nominal transmission frequency of 450 MHz
  • the antenna 1 is fed by a coaxial cable 4 the inner conductor 5 of which is connected to one
  • connection of the screen of the coaxial cable 4 to the edge at point 8 of the slot 2 can be made with or without a balun
  • the impedance of such an antenna 1 may be matched to that
  • the standard surface mounted monopole antenna currently in use has no DC connection between the central conductor and screen of the supply cable to the
  • a small fixed capacitor 9, of negligible impedance at the frequency of the radiation used, is included in the connection between one of the conductors, for
  • a parallel sided slot may be formed is by removing material between two circular openings. This ensures that there are no sharp discontinuities at
  • region of the panel is formed as a notch 30 in one edge 31 of a conductive panel 32.
  • the notch 30 has a length of approximately one quarter of the wavelength of the radiation with which the antenna is intended to be used.
  • the antenna
  • FIGS 3 and 4 illustrate the practical structure of a slot antenna system such as that
  • a dielectric panel 72 shown secured in face-to-face relationship with a dielectric panel 72 to which it is secured in any convenient manner, such as by adhesive or by individual fixing elements
  • Two holes 73, 74 are formed in the longitudinal edges 34, 35 of the slot 30 by which to make electrical connection with two insulated leads 75, 76 respectively one of which is connected to a capacitor 9 connected to the inner core 5 of the coaxial
  • the feed line 33 which constitutes the feed line to the slot 30.
  • the feed line 33 terminates closely adjacent the closed end 77 of the slot 30, on the side of the insulating sheet 72 remote from the conductor panel 32 and the two insulated leads 75, 76 lie substantially parallel to the length of the slot 30, diverging slightly to pass through the openings 73, 74 allowing the bared ends of these wires to be connected, for example by solder, to
  • the material chosen for the dielectric panel 72 has a low power
  • antenna operates with a non-resonant feed line matched to the antenna impedance. Provided that this condition is met, there will be no standing wave pattern in the
  • a suitable adhesive may be used to secure the coaxial cable 33 to the insulating panel 72.
  • the divergent leads 75, 76 which pass from the end of the coaxial
  • leads 75, 76 varies the area of the approximately triangular region between them (shown cross hatched in Figure 4 and identified with the reference numeral 78). It is
  • dielectric panels 72 can be suitably marked to enable operatives correctly to position the wires.
  • appropriate jigs or the like will be used to ensure that the leads 75, 76 are correctly positioned in relation to the holes 73, 74 and thus the slot 30.
  • a conducting enclosure 10 encompassing the slot 2 can be attached to one side of the panel 3 as shown in Figure 6. If this is positioned at about one quarter of the wavelength of the radiation signal, as shown in Figure 6, the screen will act as a reflector, which augments the signal strength in the desired direction
  • an antenna such as that described above, at which the antenna will be invisible, at least without a close inspection of the vehicle.
  • providing the radiator grille is not metallic the antenna 1 can be
  • the antenna may be mounted in or directly behind an aperture formed by
  • the antenna is installed during the construction of the vehicle, then the
  • panel may be one of the wing or door panels, again, with the slot 2 filled and painted
  • Figure 8 shows diagrammatically a slot antenna 51, 52 mounted in a panel 50 of a motor vehicle (only part of which is illustrated)
  • embodiment of the invention can be omitted, enabling the antenna to radiate to either
  • two directional antennae may be used, one mounted on each side of the wind deflector
  • the antenna described above has the disadvantage that it is fairly large
  • the invention needs to be approximately 33 cms long, and the notch 30 in the second
  • antenna shown in Figure 7 is intended for use in a confined space such as a front or
  • the length of the notch 40 is much smaller in relation to the wave length of the radiation used, for example, it may be as small as
  • a trimmer capacitor 41 may be connected across
  • the antennae described above have been considered in transmission mode only. They are, of course, equally suited for use with a transceiver unit, so permitting two-way radio communication between a vehicle and a base station.
  • more than one antenna can be used disposed around the vehicle, so as to give a quasi-omnidirectional
  • This arrangement also has the advantage that if one of the antennae is damaged or screened, either deliberately or accidentally, the system as a whole will continue to operate.
  • a slot type antenna 51, 52 such as that described with reference to Figures 1 and 2 is incorporated as an integral part of a front wing 50 of
  • the radiating slot 52 of the antenna is filled with polyester body filler
  • articulated commercial vehicle has a front surface 63 which is inclined at approximately
  • GRP glass fibre reinforced plastics material
  • signal two antennae one on each side, may be provided. If two antennae are used then it is necessary for there to be balanced interconnections between them. In fact, it is preferable for these to be two antenna on opposite sides or ends of the vehicle to give quasi-omnidirectional radiation patterns.
  • the antenna may be formed as a fin of conductive

Landscapes

  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Support Of Aerials (AREA)
  • Waveguide Aerials (AREA)
  • Details Of Aerials (AREA)

Abstract

L'invention concerne un système d'antenne de radiocommunications caché pour véhicule, qui comprend une fente ou une encoche dans un panneau conducteur du véhicule faisant partie de la structure du véhicule ou destiné à y être intégré, sur le véhicule utilisant le système de radiocommunications. Pour produire le rayonnement à polarisation verticale, on place l'antenne avec la fente ou l'encoche en position horizontale, et pour que l'antenne fonctionne sur une ligne d'alimentation non résonnante adaptée à l'impédance de l'antenne, on relie un câble coaxial aux bordures de la fente par des conducteurs isolés couplés au champ magnétique dans une partie de ladite fente. On peut aussi placer un conducteur non magnétique qui occupe une partie de la fente et qui est isolé par rapport à cette fente.
PCT/GB2000/001547 1999-05-05 2000-05-04 Systeme d'antenne de radiocommunications cache WO2000069021A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU44197/00A AU4419700A (en) 1999-05-05 2000-05-04 Concealed radio antenna system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9910246.9A GB9910246D0 (en) 1999-05-05 1999-05-05 Concealed radio atenna system
GB9910246.9 1999-05-05

Publications (1)

Publication Number Publication Date
WO2000069021A1 true WO2000069021A1 (fr) 2000-11-16

Family

ID=10852744

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2000/001547 WO2000069021A1 (fr) 1999-05-05 2000-05-04 Systeme d'antenne de radiocommunications cache

Country Status (3)

Country Link
AU (1) AU4419700A (fr)
GB (2) GB9910246D0 (fr)
WO (1) WO2000069021A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004008973A1 (de) * 2004-02-24 2005-09-22 Daimlerchrysler Ag Schlitzantenne
WO2006031438A1 (fr) * 2004-09-10 2006-03-23 General Electric Company Antenne plane dissimulee
EP2458684A3 (fr) * 2008-04-11 2014-04-30 Apple Inc. Antennes hybrides pour dispositifs électroniques
CN106252843A (zh) * 2016-09-28 2016-12-21 上海移为通信技术股份有限公司 一种vhf车载天线
EP2304846B1 (fr) * 2008-06-27 2017-11-08 Raytheon Company Élément d'antenne et méthode
WO2017211536A1 (fr) * 2016-06-07 2017-12-14 Audi Ag Véhicule à moteur doté d'un ensemble antenne
EP3367505A1 (fr) * 2017-02-27 2018-08-29 ProAnt AB Agencement d'antenne et dispositif comprenant un tel agencement d'antenne
EP2514031B1 (fr) * 2009-12-14 2018-12-05 Aerial Research Technology Limited Antenne à encoche

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0317506D0 (en) * 2003-07-25 2003-08-27 Asg Technology Ltd Concealed antenna

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE845967C (de) * 1949-02-27 1953-10-19 Bundesrepublik Deutschland Deu Frequenzunabhaengige Transformations- und Symmetrieranordnung zwischen einem erdunsymmetrischen Kabel und einer erdsymmetrischen Doppelleitung
DE2314210A1 (de) * 1973-03-22 1974-10-03 Philips Patentverwaltung Antennen-anordnung mit einzelantennenelementen
US4229744A (en) * 1979-03-14 1980-10-21 The United States Of America As Represented By The Field Operations Bureau Of The Federal Communications Commission Directional annular slot antenna
FR2553584A1 (fr) * 1983-10-13 1985-04-19 Applic Rech Electronique Antenne demi-boucle pour vehicule terrestre
DE3338614A1 (de) * 1983-10-25 1985-05-02 Brown, Boveri & Cie Ag, 6800 Mannheim Symmetrier- und transformations-leitungen
FR2556508A1 (fr) * 1983-12-13 1985-06-14 Thomson Csf Symetriseur pour coupler une ligne dissymetrique a un element symetrique
EP0429754A1 (fr) * 1989-11-23 1991-06-05 Robert Bosch Gmbh Antenne de véhicule
DE4000381A1 (de) * 1990-01-09 1991-07-11 Opel Adam Ag Schlitzantenne fuer ein kraftfahrzeug, insbesondere fuer ein pkw

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01223803A (ja) * 1988-03-03 1989-09-06 Kojima Press Co Ltd 自動車用アンテナ装置
JPH02170702A (ja) * 1988-12-23 1990-07-02 Harada Ind Co Ltd プレーンアンテナ
JPH03196704A (ja) * 1989-12-26 1991-08-28 Mazda Motor Corp 車両のアンテナ装置
EP0643437B1 (fr) * 1993-09-10 1999-10-06 Ford Motor Company Limited Antenne à fente avec un plan de masse réduite
GB2292482A (en) * 1994-08-18 1996-02-21 Plessey Semiconductors Ltd Antenna arrangement
JP3800705B2 (ja) * 1997-01-31 2006-07-26 イビデン株式会社 ボールグリッドアレイ

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE845967C (de) * 1949-02-27 1953-10-19 Bundesrepublik Deutschland Deu Frequenzunabhaengige Transformations- und Symmetrieranordnung zwischen einem erdunsymmetrischen Kabel und einer erdsymmetrischen Doppelleitung
DE2314210A1 (de) * 1973-03-22 1974-10-03 Philips Patentverwaltung Antennen-anordnung mit einzelantennenelementen
US4229744A (en) * 1979-03-14 1980-10-21 The United States Of America As Represented By The Field Operations Bureau Of The Federal Communications Commission Directional annular slot antenna
FR2553584A1 (fr) * 1983-10-13 1985-04-19 Applic Rech Electronique Antenne demi-boucle pour vehicule terrestre
DE3338614A1 (de) * 1983-10-25 1985-05-02 Brown, Boveri & Cie Ag, 6800 Mannheim Symmetrier- und transformations-leitungen
FR2556508A1 (fr) * 1983-12-13 1985-06-14 Thomson Csf Symetriseur pour coupler une ligne dissymetrique a un element symetrique
EP0429754A1 (fr) * 1989-11-23 1991-06-05 Robert Bosch Gmbh Antenne de véhicule
DE4000381A1 (de) * 1990-01-09 1991-07-11 Opel Adam Ag Schlitzantenne fuer ein kraftfahrzeug, insbesondere fuer ein pkw

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
MANN H: "Die Schlitzantenne und ihre Anwendung an Flugzeugen", LUFTFAHRTTECHNIK, vol. 3, no. 12, December 1957 (1957-12-01), pages 264 - 269, XP002143400 *

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004008973A1 (de) * 2004-02-24 2005-09-22 Daimlerchrysler Ag Schlitzantenne
DE102004008973B4 (de) * 2004-02-24 2006-02-02 Daimlerchrysler Ag Schlitzantenne
WO2006031438A1 (fr) * 2004-09-10 2006-03-23 General Electric Company Antenne plane dissimulee
EP2458684A3 (fr) * 2008-04-11 2014-04-30 Apple Inc. Antennes hybrides pour dispositifs électroniques
EP2458683A3 (fr) * 2008-04-11 2014-04-30 Apple Inc. Antennes hybrides pour dispositifs électroniques
US8994597B2 (en) 2008-04-11 2015-03-31 Apple Inc. Hybrid antennas for electronic devices
EP2304846B1 (fr) * 2008-06-27 2017-11-08 Raytheon Company Élément d'antenne et méthode
EP2514031B1 (fr) * 2009-12-14 2018-12-05 Aerial Research Technology Limited Antenne à encoche
WO2017211536A1 (fr) * 2016-06-07 2017-12-14 Audi Ag Véhicule à moteur doté d'un ensemble antenne
US10270178B2 (en) 2016-06-07 2019-04-23 Audi Ag Motor vehicle having an antenna arrangement
CN106252843A (zh) * 2016-09-28 2016-12-21 上海移为通信技术股份有限公司 一种vhf车载天线
CN106252843B (zh) * 2016-09-28 2021-05-11 上海移为通信技术股份有限公司 一种vhf车载天线
EP3367505A1 (fr) * 2017-02-27 2018-08-29 ProAnt AB Agencement d'antenne et dispositif comprenant un tel agencement d'antenne
WO2018154132A1 (fr) * 2017-02-27 2018-08-30 Proant Ab Agencement d'antenne et dispositif comprenant un tel agencement d'antenne
CN110770975A (zh) * 2017-02-27 2020-02-07 普罗安特有限公司 天线装置和包括此类天线装置的设备
US10910715B2 (en) 2017-02-27 2021-02-02 Proant Ab Antenna arrangement and a device comprising such an antenna arrangement
CN110770975B (zh) * 2017-02-27 2022-04-19 普罗安特有限公司 天线装置和包括此类天线装置的设备

Also Published As

Publication number Publication date
GB2352334B (en) 2003-08-13
AU4419700A (en) 2000-11-21
GB2352334A (en) 2001-01-24
GB9910246D0 (en) 1999-06-30
GB0010842D0 (en) 2000-06-28

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