| 摘要 |
PURPOSE: A full band leaping/frequency dividing full duplex circuit is provided to prevent a function of electronic counter-counter measures from being deteriorated and to eliminate a traffic delay and TDD(Time Division Duplex) noise in a mobile radio communication system. CONSTITUTION: When a duplexer(133) transmits a signal of radio frequency through an antenna, a traffic delay and TDD (Time Division Duplex) noise, arisen from the switching of an antenna for transmission/reception are prevented because the duplexer is connected to 2 transceivers of which bands are different from each other for performing transmission/reception at the same time. A receive variable band filter(137) examines the signal of receive frequency from a protector(135). In addition, if a jamming wave occurs on the receive frequency band, the receive variable band filter (137) sets up a receive frequency band as a variable receive frequency so as to prevent a function of electronic counter-counter measure from being deteriorated.
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