GB890939A - Radio antenna - Google Patents

Radio antenna

Info

Publication number
GB890939A
GB890939A GB4407960A GB4407960A GB890939A GB 890939 A GB890939 A GB 890939A GB 4407960 A GB4407960 A GB 4407960A GB 4407960 A GB4407960 A GB 4407960A GB 890939 A GB890939 A GB 890939A
Authority
GB
United Kingdom
Prior art keywords
horn
horns
flap
radiates
dec
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
GB4407960A
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.)
Compagnie Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston SA
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 Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Publication of GB890939A publication Critical patent/GB890939A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/01—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the shape of the antenna or antenna system
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/02—Waveguide horns

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Aerials With Secondary Devices (AREA)

Abstract

890,939. Aerials. COMPAGNIE FRANCAISE THOMSON-HOUSTON. Dec. 22, 1960 [Dec. 24, 1959], No. 44079/60. Class 40(7). An aerial comprises at least two horn radial tors which partially overlap and have a portion of their adjacent side faces formed by a flap common to both horns and movable to be in line with the remaining parts of said side faces of either horn. In a first embodiment, Fig. 2a, the axes of the horns 2, 3 are parallel. A flap 8 is hinged and is positioned at P1, when horn 2 radiates, or at P2, when horn 3 radiates. Flap 8 may have an H crosssection, the sides of the H then acting as chokes so that the flap need not touch the walls of the horns. The horn axes may meet at an angle and the horns need not be rectangular, Figs. 3, 4a and 4b, (all not shown). An array of several horns in association with a reflector is described, Fig. 5 (not shown).
GB4407960A 1959-12-24 1960-12-22 Radio antenna Expired GB890939A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR814131A FR1252837A (en) 1959-12-24 1959-12-24 New antenna for ultra-short waves

Publications (1)

Publication Number Publication Date
GB890939A true GB890939A (en) 1962-03-07

Family

ID=8723056

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4407960A Expired GB890939A (en) 1959-12-24 1960-12-22 Radio antenna

Country Status (2)

Country Link
FR (1) FR1252837A (en)
GB (1) GB890939A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3295136A (en) * 1963-07-09 1966-12-27 Bell Telephone Labor Inc Antenna system wherein beamwidth variation is achieved by changing aperture area of primary antenna

Also Published As

Publication number Publication date
FR1252837A (en) 1961-02-03

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