Patent ID: 7418247

Claim:
A radio-frequency (RF) receiver capable of receiving first RF signals in a first frequency band and second RF signals in a second frequency band lower than the first frequency band, the receiver comprising: a local oscillator; a frequency divider for frequency-dividing a signal output from the local oscillator, wherein the signal output from the frequency divider contains a first output signal and a second output signal different in phase by 90 degrees from the first output signal, the first and second output signal being produced by frequency-dividing the signal output from the local oscillator; a first signal receiving section for receiving the first RF signals in the first frequency band; a second signal receiving section for receiving the second RF signals in the second frequency band, the second signal receiving section comprising: a tuned filter allowing a signal of the second frequency band to pass through the tuned filter, a first mixer operable to mix the signal output from the tuned filter with the first output signal of the frequency divider, a phase shifter operable to shift a signal output from the first mixer in phase by 90 degrees, and a second mixer operable to mix the signal output from the tuned filter with the second output signal of the frequency divider; wherein a signal output from the second mixer and a signal output from the phase shifter are output from an output terminal of the receiver along with a signal output from the first signal receiving section.