Patent ID: 7221963

Claim:
An antenna selection diversity apparatus comprising: three or more antennas; an antenna information storage section that stores antenna gains of said three or more antennas as information indicating selection priority; a reception level measuring section that measures the reception level of an antenna in actual use selected within a period of a plurality of frames consecutively and the reception level of an antenna to be measured selected once at said period of a plurality of frames; and an antenna selection section that selects one of said three or more antennas as said antenna in actual use within a period of a plurality of frames consecutively according to said selection priority and selects one of a plurality of antennas on standby except said antenna in actual use as said antenna to be measured once at said period of a plurality of frames, said antenna selection section selecting said antenna to be measured as the antenna in actual use when the reception level of the antenna in actual use measured by said reception level measuring section falls below the reception level of the antenna to be measured a predetermined number of times consecutively, selecting the next antenna to be measured according to said selection priority and changing the antenna to be measured according to said selection priority when the reception level of the antenna in actual use measured by said reception level measuring section fails below the reception level of the antenna to be measured.