EP0515590A1 - Bases d'antenne isolees - Google Patents

Bases d'antenne isolees

Info

Publication number
EP0515590A1
EP0515590A1 EP19910918891 EP91918891A EP0515590A1 EP 0515590 A1 EP0515590 A1 EP 0515590A1 EP 19910918891 EP19910918891 EP 19910918891 EP 91918891 A EP91918891 A EP 91918891A EP 0515590 A1 EP0515590 A1 EP 0515590A1
Authority
EP
European Patent Office
Prior art keywords
antenna
vehicle
base
capacitive coupling
direct current
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.)
Withdrawn
Application number
EP19910918891
Other languages
German (de)
English (en)
Inventor
Leslie James Wallen
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.)
LES WALLEN MANUFACTURING Ltd
Original Assignee
LES WALLEN MANUFACTURING Ltd
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 GB9026466A external-priority patent/GB2250637A/en
Application filed by LES WALLEN MANUFACTURING Ltd filed Critical LES WALLEN MANUFACTURING Ltd
Publication of EP0515590A1 publication Critical patent/EP0515590A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • H01Q1/1271—Supports; Mounting means for mounting on windscreens
    • H01Q1/1285—Supports; Mounting means for mounting on windscreens with capacitive feeding through the windscreen
    • 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

Definitions

  • This invention is a range of antenna bases, integral to the antenna, using the same technical principle.
  • the vehicle When a mobile communication antenna is fitted to a vehicle, the vehicle normally becomes a part of the antenna circuit and this part of the antenna circuit is called the groundplane.
  • the antenna base is fitted by drilling a hole and the car is connected to the antenna circuit by way of the mechanical structure of the antenna base itself.
  • this has presented a number of problems, two of the most significant of these are: first, that it may not be practical to drill a hole in the car - second, that if the vehicle has an insulated return electrical system and is used in the petro-chemical industry to carry volatile liquids or explosives, or it has a highly sophisticated, computerised electrical system, the connecting of the antenna earth could make it dangerous, becoming a serious fire risk or causing a malfunction in the computer with serious probable consequences.
  • the present invention overcomes both of these problems, because it does not require a hole to be drilled and it does not connect the antenna earth to the vehicle directly, but capacitively.
  • Figure 1 the antenna base is shown in cross-section attached to the vehicle panel or bodywork, irrespective of the location.
  • the coaxial cable 8 which connects the transmitter/ receiver to the antenna is terminated within the antenna base body moulding section 4.
  • the antenna earth or return which is the screened part of the cable is
  • the centre 3 or hot part of the antenna cable 2 is connected to 1 where any suitable antenna can be affixed.
  • the connecting of the antenna earth or braid side of the coaxial cable to plate 5 could be magnetic, providing dielectric 6 is a suitable material and the vehicle surface 9 is of a ferrous material, thus allowing a magnetic flux with 5.
  • Plate 6 could be of any alternative suitable material offering itself as a capacitor plate, providing dielectric 6 is also adhesive on both sides.
  • the radio signal When the radio signal is induced into the antenna base, it is connected to the antenna affixed to 1 and to the vehicle capacitively through plate 5 and dielectric 6, due to the alternating current of the radio signal, but at no time will the vehicle be directly connected to the antenna earth.
  • the cable 8 will also be of sufficiently small diameter to practically run through extremities of the vehicle without causing problems, i.e. doors, boot lid, hatch back, door etc.

Landscapes

  • Support Of Aerials (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Details Of Aerials (AREA)

Abstract

Base d'antenne intégrée à l'antenne et présentant un couplage capacitif avec la carrosserie ou un panneau d'un vehicule métallique ou d'un matériau de remplacement, par n'importe quel procédé approprié consistant à utiliser un diélectrique ou un matériau d'une perméabilité appropriée. L'antenne est ainsi connectée à la terre, ce qui permet à un courant alternatif de la traverser sous forme d'une radiofréquence, mais ne permet pas à un courant direct de passer, de sorte que l'antenne est isolée. Le couplage capacitif et l'isolation par rapport au courant direct sont effectués par la base elle-même, de sorte qu'aucune autre structure n'est requise entre la base et le vehicule sur lequel elle est montée.
EP19910918891 1990-12-05 1991-10-25 Bases d'antenne isolees Withdrawn EP0515590A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB9026466A GB2250637A (en) 1990-12-05 1990-12-05 Isolated antenna bases
GB9026466 1990-12-05
GB9113933A GB2250639A (en) 1990-12-05 1991-06-26 Isolated antenna bases
GB9113933 1991-06-26

Publications (1)

Publication Number Publication Date
EP0515590A1 true EP0515590A1 (fr) 1992-12-02

Family

ID=26298063

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910918891 Withdrawn EP0515590A1 (fr) 1990-12-05 1991-10-25 Bases d'antenne isolees

Country Status (4)

Country Link
EP (1) EP0515590A1 (fr)
AU (1) AU8749791A (fr)
DE (1) DE9116508U1 (fr)
WO (1) WO1992010865A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4244611C2 (de) * 1992-12-31 1996-02-22 Hirschmann Richard Gmbh Co Fahrzeugantenne für hohe Frequenzen
DE4439387C2 (de) * 1994-11-04 1997-06-05 Daimler Benz Ag Antenne für ein Kraftfahrzeug
GB9612826D0 (en) * 1996-06-19 1996-08-21 Ford Motor Co Improved vehicular radio antennas
GB201105949D0 (en) * 2011-04-07 2011-05-18 Imagination Tech Ltd Vehicle antenna

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4080603A (en) * 1976-07-12 1978-03-21 Howard Belmont Moody Transmitting and receiving loop antenna with reactive loading
US4184160A (en) * 1978-03-15 1980-01-15 Affronti Victor A Antenna roof mount for vehicles
JPS5527779A (en) * 1978-08-19 1980-02-28 Sony Corp Car antenna
FR2553584B1 (fr) * 1983-10-13 1986-04-04 Applic Rech Electronique Antenne demi-boucle pour vehicule terrestre
US4658259A (en) * 1985-03-06 1987-04-14 Blaese Herbert R On-glass antenna
US4764773A (en) * 1985-07-30 1988-08-16 Larsen Electronics, Inc. Mobile antenna and through-the-glass impedance matched feed system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9210865A1 *

Also Published As

Publication number Publication date
AU8749791A (en) 1992-07-08
DE9116508U1 (de) 1992-12-24
WO1992010865A1 (fr) 1992-06-25

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19920901

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB IT LI LU NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19931118