Patent ID: 7970366
Filing Date: 2011-06-28
Classification: H01Q,H04B,H04N

Abstract:
1. A diversity receiver comprising: a plurality of first antennas having directional radiation patterns different from one another, for receiving a horizontally polarized broadcast radio signal; a plurality of first variable gain amplifiers provided for said respective first antennas, for adjusting respective gains thereof; a first adder for adding first reception signals having been received by said first antennas and gain-adjusted by said first variable gain amplifiers, to output the first added reception signal; a plurality of second antennas having directional radiation patterns different from one another, arranged in positions different from those of said first antennas, for receiving the horizontally polarized broadcast radio signal; a plurality of second variable gain amplifiers provided for said respective second antennas, for adjusting respective gains thereof; a second adder for adding second reception signals having been received by said second antennas and gain-adjusted by said second variable gain amplifiers, to output the second added reception signal; a diversity-combining circuit for diversity-combining signals based on the first and second added reception signals, to output the diversity-combined signal; and an antenna control unit for controlling said pluralities of first and second variable gain amplifiers so that a difference between the directions of the directional radiation patterns for the first and second added reception signals maintain a predefined range.