GB817714A - Aerial assembly - Google Patents

Aerial assembly

Info

Publication number
GB817714A
GB817714A GB945056A GB945056A GB817714A GB 817714 A GB817714 A GB 817714A GB 945056 A GB945056 A GB 945056A GB 945056 A GB945056 A GB 945056A GB 817714 A GB817714 A GB 817714A
Authority
GB
United Kingdom
Prior art keywords
main reflector
march
slots
give
narrow beam
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
GB945056A
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.)
ARTHUR GEORGE GILBERT HENRY RO
EK Cole Ltd
Original Assignee
ARTHUR GEORGE GILBERT HENRY RO
EK Cole Ltd
Filing date
Publication date
Application filed by ARTHUR GEORGE GILBERT HENRY RO, EK Cole Ltd filed Critical ARTHUR GEORGE GILBERT HENRY RO
Publication of GB817714A publication Critical patent/GB817714A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
    • H01Q25/001—Crossed polarisation dual antennas

Landscapes

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

Abstract

817,714. Aerials. COLE Ltd., E. K., and ROBINSON, A. G. G. H. March 26, 1957 [March 27, 1956], No. 9450/56. Class 40 (7). An aerial system intended for an airborne radar has two alternative radiation patterns which may be respectively a narrow beam and a cosecant-squared beam. The system consists of a primary element, which may be a waveguide fed dipole, mounted at the focal point of a main reflector such as B, which may be paraboloidal, to give a narrow beam pattern. The main reflector is provided with slots as shown which extend parallel to the electric vector of the incident energy. Through these slots may be inserted parallel plates separated by less than half the working wavelength, and having their front edges contoured to give the second radiation pattern. The plates may either be pivoted as at D so that they turn about an axis at the edge of the main reflector when moved from their operative to their inoperative position and vice versa, or they may be arranged to slide.
GB945056A 1956-03-27 Aerial assembly Expired GB817714A (en)

Publications (1)

Publication Number Publication Date
GB817714A true GB817714A (en) 1959-08-06

Family

ID=1629819

Family Applications (1)

Application Number Title Priority Date Filing Date
GB945056A Expired GB817714A (en) 1956-03-27 Aerial assembly

Country Status (1)

Country Link
GB (1) GB817714A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2268834A (en) * 1980-12-04 1994-01-19 Racal Mesl Ltd Radar arrangements and methods
DE19952516A1 (en) * 1999-10-30 2001-06-07 Daimler Chrysler Ag Antenna has polarization dependent beam direction rotation of reflector allows scanning

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2268834A (en) * 1980-12-04 1994-01-19 Racal Mesl Ltd Radar arrangements and methods
GB2268834B (en) * 1980-12-04 1994-06-22 Racal Mesl Ltd Radar arrangements and methods of detecting different types of targets
US5477224A (en) * 1980-12-04 1995-12-19 Racal (Newbridge) Limited Radar arrangements and methods
DE19952516A1 (en) * 1999-10-30 2001-06-07 Daimler Chrysler Ag Antenna has polarization dependent beam direction rotation of reflector allows scanning

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