| 摘要 |
<p>An antenna receiver includes a plurality of mixers (7,8,9) for frequency-converting signals received by a plurality of antennas (1,2,3) into intermediate-frequency signals; a plurality of local oscillators (10,11,12), which correspond to the plurality of mixers (7,8,9) and which supply local oscillation signals having the same frequency to the mixers; a plurality of PLL circuits (13,14,15), which correspond to the plurality of local oscillators (10,11,12) and which set the frequency of the local oscillation signals; and an adder (23) for adding the intermediate-frequency signals output from the mixers. The phases of reference signals supplied to the PLL (13,14,15) circuits can be changed independently from each other by phase shifters (17,18,19) being connected to a single reference signal source (16). <IMAGE></p> |
