Space diversity receiving system with phase- controlled...

Details Space diversity receiving system with phase- controlled... Space diversity receiving system with phase- controlled...

H - Electricity

04

B

325/95

H04B 7/08 (2006.01)

Patent

CA 1088632

ABSTRACT OF THE DISCLOSURE Disclosed is a space diversity receiving system for combining a plurality of reception antenna outputs at an intermediate frequency stage with an in-phase relationship maintained among them. A phase-shifter phase- shifts at least one of the antenna outputs after being converted into inter- mediate frequency signals. A first combiner combines the output of the phase-shifter and non-phase-shift intermediate frequency signals. A first branching circuit branches out the output of the phase-shifter. A second branching circuit branches out the non-phase-shift intermediate frequency signals. A phase-modulator phase-modulates either one of the outputs of the first and second outputs of the branching circuits with a low frequency signal. A second combiner combines the output of the phase-modulator and the non-phase-modulation output. The amount of phase shift at the phase- shifter is controlled in response to the output of the second combiner.

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