Patent ID: 7773966

Claim:
A mobile terminal comprising: a first radio frequency transmitter/receiver for transmitting and receiving a first radio frequency signal via a first antenna; a first signal coupler extracting a low power signal from a signal outputted from the first transmitter/receiver; a second radio frequency receiver receiving a second radio frequency signal via a second antenna; a phase-noise filter through which a phase-noise signal of the first radio frequency signal corresponding to a second radio frequency receiving band from the signals extracted by the first signal coupler; a phase shifter for inverting a phase of the phase-noise signal of the first radio frequency signal from the phase-noise filter; a variable gain amplifier modulating a level of a signal from the phase shifter; and a signal combiner combining a signal from the variable gain amplifier with the second radio frequency signal from the second antenna and reducing the phase-noise signal of the first radio frequency signal included in the second radio frequency signal; and a noise reduction controller controlling reduction of the phase-noise signal included in the second radio frequency signal based on a control signal from the second radio frequency receiver, wherein the noise reduction controller receives the control signal from the second radio frequency receiver and controls variableness of main frequencies of the phase-noise filter and the phase shifter based on channel information included in the control signal.