Communications: radio wave antennas – Antennas – With polarization filter or converter
Patent
1994-03-17
1996-10-22
Brown, Peter Toby
Communications: radio wave antennas
Antennas
With polarization filter or converter
343853, 333 21A, 4552781, 455284, 455304, 455305, H01Q 2300, H01P 1161, H04R 112
Patent
active
055681581
ABSTRACT:
Electronically adaptable polarization antenna feed apparatus for receiving any sense of linear polarization or for receiving either sense of circular polarization. The circuit makes use of variable gain amplifiers and/or variable attenuators in each of two orthogonally polarized paths. The signal to noise ratio of a desired polarization sense is maximized by adjusting the amplitude or gain in each path to a desired ratio. If desired, polarization components from the two probes may be combined so that orthogonal polarization senses from two frequency reuse signals be used simultaneously. The apparatus may be used with linearly polarized signals and with circularly polarized signals.
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patent: 5245353 (1993-09-01), Gould
Kreutel, Jr. et al., Antenna Technology for Frequency Reuse Satellite Communications, Proceedings of the IEEE, vol. 65, No. 3 Mar. 1977 pp. 370-378.
Brown Peter Toby
Shields H. Gordon
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