Patent ID: 8670338

Claim:
A radio communication device for executing a communication on the basis of a frequency division duplex, the radio communication device comprising: a first antenna; a second antenna; a first receiver configured to receive a first radio frequency signal via the first antenna; a second receiver configured to receive the first radio frequency signal via the second antenna; a transmitter configured to transmit a second radio frequency signal via the second antenna; a duplexer coupled to the first antenna and the first receiver, and configured to pass a component of the first radio frequency signal in a received signal received via the first antenna to the first receiver and to extract a component of the second radio frequency signal in the received signal; a power measuring circuit coupled to the duplexer and configured to measure a first power of the component of the second radio frequency signal; and a controller configured to control a variable reactance between the first antenna and the second antenna so as to lower an amount of coupling between the first antenna and the second antenna on the basis of the measured first power.