GB2250637A - Isolated antenna bases - Google Patents

Isolated antenna bases Download PDF

Info

Publication number
GB2250637A
GB2250637A GB9026466A GB9026466A GB2250637A GB 2250637 A GB2250637 A GB 2250637A GB 9026466 A GB9026466 A GB 9026466A GB 9026466 A GB9026466 A GB 9026466A GB 2250637 A GB2250637 A GB 2250637A
Authority
GB
United Kingdom
Prior art keywords
antenna
vehicle
pass
antenna bases
bases
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Withdrawn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
GB9026466A
Other versions
GB9026466D0 (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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB9026466A priority Critical patent/GB2250637A/en
Publication of GB9026466D0 publication Critical patent/GB9026466D0/en
Priority to GB9113933A priority patent/GB2250639A/en
Priority to EP19910918891 priority patent/EP0515590A1/en
Priority to DE9116508U priority patent/DE9116508U1/de
Priority to PCT/GB1991/001875 priority patent/WO1992010865A1/en
Priority to AU87497/91A priority patent/AU8749791A/en
Publication of GB2250637A publication Critical patent/GB2250637A/en
Withdrawn legal-status Critical Current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

Abstract

Antenna bases which are capacitively coupled with the vehicle, or any other groundplane, by any appropriate method comprising of a dielectric or material of suitable permeativity. The antenna is thereby coupled to ground enabling alternating current to pass in the form of radio frequency, but not allowing direct current to pass and thus isolating it.

Description

Description Isolated antenna bases This invention is a range of antenna bases using the same technical principle.
Antenna bases used for mounting antennae to vehicle bodies will have potential to the vehicle cab or chassis (or to any other groundplane) in most cases connecting the vehicle cab or chassis to the negative potential of the vehicle via the antenna leed (feeder). This is acceptable in most cases, however, if the vehicle has an isolated return wiring system then it is unacceptable to connect the chassis/cab to negative potential.
The present invention allows an antenna to be fitted to an isolated return vehicle chassis/cab (or any other groundplane) without connecting the chassis/cab to negative potential via the radio. This is done by making the antenna ground connection to the chassis/cab capacitive thus enabling it to be part of the radio frequency circuit without allowing direct current to pass. An added advantage of a capacitively coupled antenna base is that it will always guarantee the antenna's connection to ground without having to scrape away or pierce any paintwork or any other insulative L'W surfaces, as direct current is not required to pass and the capacitive coupling of the antenna to ground can be guaranteed.
The antenna base may be fastened, attached or secured by any suitable method which comprises of a dielectric or material of suitable permeativity.

Claims (1)

  1. Claim
    An antenna base which is capacitively coupled to its vehicle, or other groundplane, which is fastened, attached or secured via any suitable method comprising of a dielectric or material of suitable permeativity thus isolating it from direct current, but allowing an alternating current to pass.
GB9026466A 1990-12-05 1990-12-05 Isolated antenna bases Withdrawn GB2250637A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
GB9026466A GB2250637A (en) 1990-12-05 1990-12-05 Isolated antenna bases
GB9113933A GB2250639A (en) 1990-12-05 1991-06-26 Isolated antenna bases
EP19910918891 EP0515590A1 (en) 1990-12-05 1991-10-25 Isolated antenna bases
DE9116508U DE9116508U1 (en) 1990-12-05 1991-10-25
PCT/GB1991/001875 WO1992010865A1 (en) 1990-12-05 1991-10-25 Isolated antenna bases
AU87497/91A AU8749791A (en) 1990-12-05 1991-10-25 Isolated antenna bases

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9026466A GB2250637A (en) 1990-12-05 1990-12-05 Isolated antenna bases

Publications (2)

Publication Number Publication Date
GB9026466D0 GB9026466D0 (en) 1991-01-23
GB2250637A true GB2250637A (en) 1992-06-10

Family

ID=10686532

Family Applications (2)

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

Family Applications After (1)

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

Country Status (1)

Country Link
GB (2) GB2250637A (en)

Citations (7)

* 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
EP0137391A1 (en) * 1983-09-23 1985-04-17 Allen Telecom Group, Inc. Cellular mobile communications antenna
EP0181782A1 (en) * 1984-11-15 1986-05-21 Toyota Jidosha Kabushiki Kaisha Automobile antenna system
GB2172148A (en) * 1985-03-06 1986-09-10 Blaese Herbert R Antenna
GB2194101A (en) * 1986-08-14 1988-02-24 Matsushita Electric Works Ltd Plane antenna
US4785305A (en) * 1987-04-20 1988-11-15 Don Shyu Glass-mountable antenna assembly with microstrip filter

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4115779A (en) * 1976-05-14 1978-09-19 Instrumentation Specialties Company Automobile trunk antenna mount
US4329689A (en) * 1978-10-10 1982-05-11 The Boeing Company Microstrip antenna structure having stacked microstrip elements

Patent Citations (7)

* 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
EP0137391A1 (en) * 1983-09-23 1985-04-17 Allen Telecom Group, Inc. Cellular mobile communications antenna
EP0181782A1 (en) * 1984-11-15 1986-05-21 Toyota Jidosha Kabushiki Kaisha Automobile antenna system
GB2172148A (en) * 1985-03-06 1986-09-10 Blaese Herbert R Antenna
GB2194101A (en) * 1986-08-14 1988-02-24 Matsushita Electric Works Ltd Plane antenna
US4785305A (en) * 1987-04-20 1988-11-15 Don Shyu Glass-mountable antenna assembly with microstrip filter

Also Published As

Publication number Publication date
GB9026466D0 (en) 1991-01-23
GB9113933D0 (en) 1991-08-14
GB2250639A (en) 1992-06-10

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)