| 摘要 |
PURPOSE:To suppress the electromagnetic wave mutual interference between ratio equipments by branching a transmission signal of a transmitter, applying a delay to the branched signal and adjusting to the intensity, inverting the phase of the signal and leading it to a reception circuit so as to eliminate an interference wave in the received signal. CONSTITUTION:A transmission wave of the transmitter 4 being an interference source is inputted to a delay circuit 1 while being branched. The output of the circuit 1 is attenuated by a band pass filter 2. A signal received by a reception antenna 7 and an output of the filter 2 are amplified differentially by a differential amplifier 3. The interference wave is erased in the amplifier 3 and only the received wave is inputted to a receiver 6. Thus, the interference wave in the reception signal is eliminated and the electromagnetic mutual interference between radio equipments is suppressed.
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