| 摘要 |
PURPOSE:To compound the interference wave components contained in the signals so that they can be antiphase to each other, and flatten the frequency characteristic, by compounding the signals received by 2 sets of antennas so that the in-band deviation can be reduced. CONSTITUTION:The signals e1 and e2 received by 2 sets of antennas 1, 4 are made to pass through the phase modulator 2 and the phase shifter 5, respctively, and after that, they are compounded by the compounding device 3, and are converted to the IF signal having a constant signal level by the receiver 6. This IF signal is provided to the band characteristic detection circuit 8, the amplitude after compounding or the delay frequency characteristic is observed, and the necessary in-band amplitude or the delay deviation is detected. This in-band deviation signal is provided to the control circuit 9, the phase shifter 5 is controlled, and the deviation is reduced. |
