| 摘要 |
PROBLEM TO BE SOLVED: To calibrate the phase difference generated by the path difference of the sum signal and the difference signal from a power feeding part (including an RF sensor) to a tracking receiver even if the connecting length between the power feeding part (including the RF sensor) and the tracking receiver becomes long by the restriction in mounting such as the securing of the visual field of an antenna. SOLUTION: A reference IF-signal oscillator 30 for generating the equivalent frequency as an IF signal is used. A reference RF signal is formed from the reference IF signal and an LO signal. The reference RF signal is inputted into the sum-signal output end and the difference-signal output end of a power feeding part (including an RF sensor) 3 by using a calibrating sum-signal coupler 39 and a calibrating difference-signal coupler 40. At the same time, a second sum-signal RF amplifier 41 and a second difference-signal RF amplifier 42 are added between the power feeding part (including the RF sensor) 3 and the tracking receiver 4. |
