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GB1500279A - Whip antennas - Google Patents

Whip antennas

Info

Publication number
GB1500279A
GB1500279A GB3393674A GB3393674A GB1500279A GB 1500279 A GB1500279 A GB 1500279A GB 3393674 A GB3393674 A GB 3393674A GB 3393674 A GB3393674 A GB 3393674A GB 1500279 A GB1500279 A GB 1500279A
Authority
GB
United Kingdom
Prior art keywords
choke
bands
antenna
plessey
aerials
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
Application number
GB3393674A
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.)
Plessey Co Ltd
Original Assignee
Plessey Co 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
Application filed by Plessey Co Ltd filed Critical Plessey Co Ltd
Priority to GB3393674A priority Critical patent/GB1500279A/en
Publication of GB1500279A publication Critical patent/GB1500279A/en
Expired legal-status Critical Current

Links

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

Landscapes

  • Details Of Aerials (AREA)

Abstract

1500279 Aerials PLESSEY CO Ltd 5 May 1975 [1 Aug 1974] 33936/74 Heading H4A An asymmetric dipole whip antenna comprises a stub portion 6, a stepped line impedance transformer device 8 giving simultaneous impedance match between a feed point 24 and an output port 26 over two frequency bands which are separated from each other, and a choke 10. The choke 10, made by coiling a 75 ohm cable 28 on a ferrite core 30, isolates the lower part of the antenna from the ground plane 4 which may be the body of a vehicle. The centre frequencies of the bands may be in the ratio 2:1. Outer covering 21 may be of glass fibre and the inner antenna element 23 may be a Be-Cu alloy.
GB3393674A 1975-05-05 1975-05-05 Whip antennas Expired GB1500279A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3393674A GB1500279A (en) 1975-05-05 1975-05-05 Whip antennas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3393674A GB1500279A (en) 1975-05-05 1975-05-05 Whip antennas

Publications (1)

Publication Number Publication Date
GB1500279A true GB1500279A (en) 1978-02-08

Family

ID=10359308

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3393674A Expired GB1500279A (en) 1975-05-05 1975-05-05 Whip antennas

Country Status (1)

Country Link
GB (1) GB1500279A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986006216A1 (en) * 1985-04-10 1986-10-23 American Telephone & Telegraph Company Multiband antenna
EP0407459A1 (en) * 1988-12-06 1991-01-16 HENF, George The gap radiated antenna
US7852283B2 (en) 2005-01-20 2010-12-14 Comrod As Rod antenna device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4658260A (en) * 1984-06-25 1987-04-14 At&T Company Telescoping multiband antenna
WO1986006216A1 (en) * 1985-04-10 1986-10-23 American Telephone & Telegraph Company Multiband antenna
EP0407459A1 (en) * 1988-12-06 1991-01-16 HENF, George The gap radiated antenna
EP0407459A4 (en) * 1988-12-06 1991-12-11 George Henf The gap radiated antenna
US7852283B2 (en) 2005-01-20 2010-12-14 Comrod As Rod antenna device

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee