GB576159A - Improvements in radio aerials - Google Patents

Improvements in radio aerials

Info

Publication number
GB576159A
GB576159A GB1729742A GB1729742A GB576159A GB 576159 A GB576159 A GB 576159A GB 1729742 A GB1729742 A GB 1729742A GB 1729742 A GB1729742 A GB 1729742A GB 576159 A GB576159 A GB 576159A
Authority
GB
United Kingdom
Prior art keywords
helix
wound
primary
former
primary helix
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
GB1729742A
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph 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 filed Critical Marconis Wireless Telegraph Co Ltd
Priority to GB1729742A priority Critical patent/GB576159A/en
Publication of GB576159A publication Critical patent/GB576159A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
    • H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
    • H01Q11/08—Helical antennas

Abstract

576,159. Aerials. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., and FRANKLIN, C. S. Dec. 4, 1942, No. 17297. Addition to 573,896. [Class 40 (v)] A directional aerial comprises a straight helix formed from a conductor which is first wound into a primary helix of small diameter, the primary helix being then wound into a secondary helix as shown in Fig. 2. The dimensions are such that l+s=#, being the distance in wavelengths along the primary helix between corresponding points of two successive travelling waves, and s the spacing between turns in wavelengths. In use, the aerial may be energized at one end and terminated at the other end by an earthed impedance. The primary helix may be wound on a cord, strip or other former which may be left within the helix when the latter is wound on a second former. Either helix may be square, polygonal, circular, or elliptical in cross-section and may be flattened to constitute a succession of zig-zags. The pitch or diameter of the primary helix may be progressively varied.
GB1729742A 1942-12-04 1942-12-04 Improvements in radio aerials Expired GB576159A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1729742A GB576159A (en) 1942-12-04 1942-12-04 Improvements in radio aerials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1729742A GB576159A (en) 1942-12-04 1942-12-04 Improvements in radio aerials

Publications (1)

Publication Number Publication Date
GB576159A true GB576159A (en) 1946-03-21

Family

ID=10092704

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1729742A Expired GB576159A (en) 1942-12-04 1942-12-04 Improvements in radio aerials

Country Status (1)

Country Link
GB (1) GB576159A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3568205A (en) * 1968-02-12 1971-03-02 Goodyear Aerospace Corp Novel helical antenna
WO2007051931A2 (en) * 2005-11-07 2007-05-10 Yves Reza Miniaturised antennas for consumer use

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3568205A (en) * 1968-02-12 1971-03-02 Goodyear Aerospace Corp Novel helical antenna
WO2007051931A2 (en) * 2005-11-07 2007-05-10 Yves Reza Miniaturised antennas for consumer use
FR2893188A1 (en) * 2005-11-07 2007-05-11 Yves Reza MINIATURIZED PROPELLER ANTENNA FOR CONSUMER USE
WO2007051931A3 (en) * 2005-11-07 2007-07-05 Yves Reza Miniaturised antennas for consumer use

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