Communications: radio wave antennas – Antennas – With polarization filter or converter
Patent
1989-04-25
1991-10-01
Wimer, Michael C.
Communications: radio wave antennas
Antennas
With polarization filter or converter
343797, H01Q 1524
Patent
active
050537857
ABSTRACT:
A surface for an antenna for use in discriminating between horizontal and vertical polarization components of a circularly polorized electromagnetic wave comprises at least one pair of dipoles, one of the dipoles of each pair of dipoles being adapted to receive one component of circular polarization and the other dipole of each pair of dipoles being adapted to receive the other component of circular polarization, and a transmission line extending between and electrically connecting the feed points of the dipoles of each pair of dipoles, whereby an incident circularly polarized electromagnetic wave is reflected when its two polarization components are incident upon their respective dipoles in phase and is transmitted when the its two components are incident upon their respective dipoles 180 electrical degrees out-of-phase.
REFERENCES:
patent: 2272312 (1942-02-01), Tunick
patent: 4198641 (1980-04-01), Gibson
Schiner, UHF Directional Array with Variable Polarization, News from Rohded Schwarz, 46, vol. 11, 1971.
Tilston David
Tilston Mark
Tilston Stephen E.
Tilston, deceased William V.
Tralman Thomas
Her Majesty the Queen in right of Canada as represented by the
Wimer Michael C.
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