Patent ID: 6044254
Filing Date: 2000-03-28
Classification: H04B,Y02D

Abstract:
A space diversity radio frequency receiving circuit, comprising:a first signal receiving branch having an antenna and a divider for dividing the first branch into a first path and a second path, the second path having the capability of being shifted in phase;a second signal receiving branch having an antenna and a divider for dividing the second branch into a first path and a second path;a pair of combining means for generating a sum signal or a difference signal from signals of the first branch first path and the second branch first path, and the first branch second path and the second branch second path respectively;means for giving delay to an output of one of said combining means;means for summationally combining an output of said delay means and an output of the not-delayed combining means so that the first signal receiving branch and the second signal receiving branch are made into one combined signal;desired-wave pass filter means for receiving an output of said summationally combining means;dividing means for receiving an output of said desired-wave pass filter means;orthogonal detection means for receiving an output of said dividing means; andfilter means for receiving an output of said orthogonal detection means to extract a base band signal therefrom.