GB948827A - Improvements in or relating to circularly polarised microwave apparatus - Google Patents

Improvements in or relating to circularly polarised microwave apparatus

Info

Publication number
GB948827A
GB948827A GB4388860A GB4388860A GB948827A GB 948827 A GB948827 A GB 948827A GB 4388860 A GB4388860 A GB 4388860A GB 4388860 A GB4388860 A GB 4388860A GB 948827 A GB948827 A GB 948827A
Authority
GB
United Kingdom
Prior art keywords
wave
horn
phase
reflected
circularity
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
GB4388860A
Inventor
John Richard Mark
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
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 Marconi Co Ltd filed Critical Marconi Co Ltd
Priority to GB4388860A priority Critical patent/GB948827A/en
Publication of GB948827A publication Critical patent/GB948827A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/165—Auxiliary devices for rotating the plane of polarisation
    • H01P1/17—Auxiliary devices for rotating the plane of polarisation for producing a continuously rotating polarisation, e.g. circular polarisation
    • H01P1/172—Auxiliary devices for rotating the plane of polarisation for producing a continuously rotating polarisation, e.g. circular polarisation using a dielectric element

Landscapes

  • Aerials With Secondary Devices (AREA)
  • Waveguide Aerials (AREA)

Abstract

948,827. Aerials. MARCONI CO. Ltd. Aug. 10, 1961 [Dec. 21, 1960], No. 43888/60. Heading H4A. [Also in Division H1] The symmetry of a circularly polarized (CP) wave is preserved by reflecting back, in suitable phase, components of the wave which are reflected by the asymmetric horn 8. In the radar system shown, a wave propagated in a square waveguide 2 with a direction of polarization indicated by vertical vector E is converted by polarizer 6 into a CP wave and radiated by rectangular-section horn 8. The asymmetry of the horn causes partial and unequal reflection of the orthogonal components of the wave with consequent loss of circularity. The horizontal component of the reflected energy is shifted in phase by the adjustable phase-shifter 4 and re-reflected towards the horn by a short-circuit 3 consisting of an array of horizontal conductors. It is stated that loss of circularity is compensated if the phaseshifter is suitably adjusted. The phase-shifter comprises a horizontal sheet of polystyrene vertically movable by means of an insulating threaded rod 5.
GB4388860A 1960-12-21 1960-12-21 Improvements in or relating to circularly polarised microwave apparatus Expired GB948827A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4388860A GB948827A (en) 1960-12-21 1960-12-21 Improvements in or relating to circularly polarised microwave apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4388860A GB948827A (en) 1960-12-21 1960-12-21 Improvements in or relating to circularly polarised microwave apparatus

Publications (1)

Publication Number Publication Date
GB948827A true GB948827A (en) 1964-02-05

Family

ID=10430768

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4388860A Expired GB948827A (en) 1960-12-21 1960-12-21 Improvements in or relating to circularly polarised microwave apparatus

Country Status (1)

Country Link
GB (1) GB948827A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2766625A1 (en) * 1997-07-28 1999-01-29 Alsthom Cge Alcatel SENSE CIRCULAR POLARIZATION ANTENNA

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2766625A1 (en) * 1997-07-28 1999-01-29 Alsthom Cge Alcatel SENSE CIRCULAR POLARIZATION ANTENNA
EP0895298A1 (en) * 1997-07-28 1999-02-03 Alcatel Antenna with circular polarisation in one sense

Similar Documents

Publication Publication Date Title
US2607849A (en) Control of polarization in wave guides and wave guide systems
US4395685A (en) Waveguide junction for producing circularly polarized signal
US4266203A (en) Microwave polarization transformer
GB1481175A (en) Circularly polarized phased antenna array
GB874509A (en) Improvements in or relating to radio horns
NO315628B1 (en) Double polarizing antenna with common aperture
GB617381A (en) Wave guide phase shifters
GB620583A (en) Improvements in or relating to ultra high frequency electrical transmission systems
GB780086A (en) Improvements in and relating to electromagnetic wave radiators
GB818447A (en) Microwave antenna feed for circular polarization
US2502394A (en) Radio beacon system
ES252680A1 (en) Feed assembly for circular or linear polarization
GB1268341A (en) Improvements in parabolic antennas
GB948827A (en) Improvements in or relating to circularly polarised microwave apparatus
GB1465158A (en) Antenna system for primary and secondary radar
US3025513A (en) Radar apparatus
US3267477A (en) Dual frequency microwave antenna
GB652168A (en) Improvements in modulating systems for ultra short waves
US2761059A (en) Wave polarization discriminating duplexing system
GB1167598A (en) Improvements in or relating to Reflectors for Circularly Polarised Electro-Magnetic Waves
GB848531A (en) Improvements in or relating to radar apparatus
GB936112A (en) Improvements in or relating to propagation of radar energy
US3046498A (en) Polarizer means
GB742401A (en) Microwave transmission apparatus
GB1220128A (en) Improvements in or relating to polarisation changing arrays for electromagnetic waves