H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 15/00 (2006.01) H01Q 19/02 (2006.01) H04B 1/12 (2006.01) H04B 7/185 (2006.01)
Patent
CA 2179210
Disclosed is a cross-polarization cancellation apparatus and method particularly useful in a frequency reuse system, including a dual-polarized receiving system that receives a first electromagnetic signal having frequencieswithin a given frequency channel, which signal is transmitted from an external source at a first polarization. The receiving system also receives a second signal having frequency components within the given frequency channel which was transmitted at a second, different polarization. Received cross polarized energy of the second signal is cancelled by employing an antenna for receiving the first and second signals and for providing first and second antenna output signals containing received energy arriving at the antenna at the respective first and second polarizations. A novel circuit arrangement applies the antenna output signals to a combiner at an optimized relative amplitude and phase to substantially cancel the received cross polarized energy of the second electromagnetic signal.
At&t Ipm Corp.
Kirby Eades Gale Baker
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