GB539858A - Improvements in demountable antennae for wireless systems - Google Patents

Improvements in demountable antennae for wireless systems

Info

Publication number
GB539858A
GB539858A GB3465/40A GB346540A GB539858A GB 539858 A GB539858 A GB 539858A GB 3465/40 A GB3465/40 A GB 3465/40A GB 346540 A GB346540 A GB 346540A GB 539858 A GB539858 A GB 539858A
Authority
GB
United Kingdom
Prior art keywords
demountable
antennae
feb
quarter
impedance
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
GB3465/40A
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.)
Marconis Wireless Telegraph Co Ltd
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
Marconi 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 Marconis Wireless Telegraph Co Ltd, Marconi Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Publication of GB539858A publication Critical patent/GB539858A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/32—Vertical arrangement of element
    • H01Q9/38—Vertical arrangement of element with counterpoise

Landscapes

  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

539,858. Aerials; wireless signalling. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Feb. 23, 1940, No. 3465. Convention date, Feb. 23, 1939. [Class 40 (v)] A low-impedance quarter-wave dipole 19 is fed from a conventional 70- ohm feeder 35 through an impedance "transformer" comprising two quarterwave sections, 27 and 7, the later being " earthed " or short-circuited at 11 in order to insulate the dipole. Four quarter-wave elements 41 serve to prevent leakage of high-frequency currents from the radiator to the feeder. They may also form part of a " turnstile " array as described in Specification 481,903. The aerial is designed to be demountable, and requires no further " matching " to the feed-line.
GB3465/40A 1939-02-23 1940-02-23 Improvements in demountable antennae for wireless systems Expired GB539858A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US539858XA 1939-02-23 1939-02-23

Publications (1)

Publication Number Publication Date
GB539858A true GB539858A (en) 1941-09-26

Family

ID=21987931

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3465/40A Expired GB539858A (en) 1939-02-23 1940-02-23 Improvements in demountable antennae for wireless systems

Country Status (1)

Country Link
GB (1) GB539858A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0075374A1 (en) * 1981-09-23 1983-03-30 Budapesti Radiotechnikai Gyar Ground-plane antenna

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0075374A1 (en) * 1981-09-23 1983-03-30 Budapesti Radiotechnikai Gyar Ground-plane antenna

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