| 摘要 |
A duplex communication wireless apparatus of the type wherein the sum or difference component of a transmission frequency f1 and a reception frequency f2 becomes an intermediate frequency of a receiver. The apparatus includes an input/output resonance circuit exhibiting resonance substantially with said transmission frequency f1 and said reception frequency f2; and a reception input circuit adapted to receive simultaneously both a transmission signal at the transmission frequency f1 from a transmitter and a reception signal at the reception frequency f2 supplied through said input/output resonance circuit for conversion into an intermediate frequency component signal of ¦f1+/-52¦ and to produce an output.
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