| 摘要 |
PURPOSE:To attain sufficient compensating effect even for a broad band signal, by compensating an interference wave component for radio lines by means of split frequency bands. CONSTITUTION:A signal of an interference wave receiving antenna 2 receiving the same interference wave as that received by a receiving antenna 1 of a desired wave is split into two frequency bands by a power distributor 9 and filters 10a, 10b. Then the split signals are distributed to control circuits 8a, 8b and phase shifters 4a, 4b by power distributors 3a, 3b, respectively. The output of the phase shifters 4a, 4b is controlled for amplitude and delay by variable attenuators 5a, 5b and variable delay lines 11a, 11b and synthesized with a signal of the antenna 1 for a receiving a desired wave by power distributors 12, 6. The signal after the synthesis is applied to control circuits 8a, 8b with power distributors 7, 13. The control circuits 8a, 8b control the phase shifters 4a, 4b, the variable attenuators 5a, 5b and the variable delay lines 11a, 11b by using these signals and a signal from the power distributors 3a, 3b. |
