Duplexing circularly polarized composite

Details Duplexing circularly polarized composite Duplexing circularly polarized composite

1991-09-11

1993-06-29

Wimer, Michael C.

Communications: radio wave antennas

Antennas

Microstrip

343853, H01Q 138, H01Q 500, H01Q 2124

Patent

active

052238482

ABSTRACT:
A duplexing circularly polarized composite antenna comprises at least one pair of radiator elements supportings orthogonal (vertical and horizontal) linear polarization. One radiator element is fed with a signal with a phase difference of 90.degree. relative to the signal fed to the other radiator element. Each radiator element transmits and/or receives signals at two different frequencies having orthogonal polarization. One radiator element operates at a first frequency with vertical polarization and a second frequency with horizontal polarization. The other radiator element operates at the first frequency with horizontal polarization and at the second frequency with vertical polarization.

REFERENCES:
patent: 3921177 (1973-04-01), Munson
patent: 3971032 (1975-08-01), Munson et al.
patent: 4356492 (1982-10-01), Kaloi
patent: 4464663 (1984-08-01), Lalezari et al.
patent: 4737793 (1988-04-01), Munson et al.
patent: 4857938 (1989-08-01), Tsukamoto et al.
Microwave Journal, vol. 30, n.degree. 4, Apr. 1987, pp. 87-96, Norwood, Mass., US; F. Lalezari et al.: "mm-Wave Microstrip Antennas".

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