| 摘要 |
PURPOSE: A full duplex communication apparatus is provided to reduce transmitting/receiving noise by using a single antenna. CONSTITUTION: A hybrid divider(27) changes a phase of a transmitting signal by 180 degrees to output it. A variable attenuator(29) attenuates an amplitude of an output signal of the hybrid divider(27) by its inverse number. A synthesizer(25) synthesizes a receiving signal and a signal inputted from the variable attenuator(29). A circulator(23) outputs the transmitting signal to a transmitting/receiving antenna(21). The circulator(23) outputs the receiving signal inputted from the transmitting/receiving antenna(21) to the synthesizer(25). A control interface(37) generates a PWM(Pulse Width Modulation) control signal for controlling a carrier frequency generation of a carrier frequency generator(33). The control interface(37) interfaces a transmitting/receiving signal inputted and outputted to a transmitter(31) and a receiver(35).
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