| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a radio transmitter/receiver capable of reducing the deterioration of reception characteristics due to the influence of transmission signal. <P>SOLUTION: The radio transmitter/receiver comprises a receiving circuit 22 for receiving a reception signal; a modulation circuit 1 for modulating a baseband signal to generate an IF signal of which the frequency is a sum of bandwidth of a frequency band common with a communicating party and 1/2 bandwidth of the reception signal or larger and which defines a frequency smaller than a minimum frequency in the common frequency band as a central frequency; an RF mixer 9 for performing frequency conversion upon the IF signal into a transmission signal, defining frequency in the common frequency band as the center frequency; and a circulator 15 for outputting the transmission signal to an antenna 16 and simultaneously outputting a reception signal from the antenna 16 to the receiving circuit 22. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
