| 摘要 |
PROBLEM TO BE SOLVED: To provide a variable phase shifter and a radio relay apparatus using the same which quickly provides a great phase over 360°, using a sample structure. SOLUTION: The relay apparatus comprises a power distributor 1 for power-distributing input high frequency signals via an input terminal T1 to a plurality of high frequency signals, a plurality of delay lines 2-4 for giving delays ofλ/4,λ/2, (3/4)λto the plurality of high frequency signals S2-S4 distributed by the distributor 1, a plurality of variable attenuators R1-R4 for variably attenuating the amplitudes of the high frequency signals 1 and high frequency signals outputted from the delay lines 2-4, a power combiner 5 for power-combining a plurality of high frequency signals outputted from the plurality of variable attenuators R1-R4, and a controller C1 for controlling the attenuations of the plurality of variable attenuators R1-R4 so that high frequency signals outputted from the power combiner 5 may have designated phases. COPYRIGHT: (C)2004,JPO |
