| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem that, in a radio communication apparatus, reception sensitivity in simultaneous transmission/reception may be deteriorated occasionally. <P>SOLUTION: A radio communication apparatus includes: an antenna 1101+, an antenna 1101-; a transmitting circuit 204 outputting a transmitting signal as an in-phase signal; a duplexer 1102 which is connected to the antenna 1101+ and the antenna 1101-, has a single-phase input terminal and a balanced output terminal electrically connected with the single-phase input terminal, conveys the transmitting signal input to the single-phase input terminal to the antennas 1101+ and 1101-, outputs a receiving signal received from the antennas 1101+ and 1101- substantially as a differential signal from the balanced output terminal and outputs transmitting signal leak substantially as an in-phase signal from the balanced output terminal; and a receiving circuit 103 which is connected to the balanced output terminal and has a circuit in which a gain of a signal of a differential component is higher than that of a signal of an in-phase component, or a loss of the signal of the differential component is lower than that of the signal of the in-phase component. <P>COPYRIGHT: (C)2009,JPO&INPIT |
