H - Electricity – 01 – Q
Patent
H - Electricity
01
Q
351/13
H01Q 3/08 (2006.01) H04B 7/00 (2006.01)
Patent
CA 1076248
RCA 69,527 ANTENNA SYSTEM WITH AUTOMATIC DEPOLARIZATION CORRECTION Abstract A spectrum reuse antenna system is described for transmitting orthogonally polarized RF waves at one frequency band to a satellite and for receiving orthogonally polarized RF waves from a satellite at a second frequency band through a common antenna. A local generator provides a first control signal which varies as a function of the typical rotation of the polarization of a transmitted wave at the one frequency band travelling through the ionosphere. The local generator also provides a second control signal which varies as a function of the typical rotation of the polarization of a received wave at the second frequency band travelling through the ionosphere. A driven means responsive to the first control signal causes a rotation of the polarization of the transmitted waves to correct for Faraday rotation in the ionosphere and a driven means responsive to the second control signal causes rotation of the polarization angle of the antenna system for the received waves to correct for the Faraday rotation. -1-
281267
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