Patent ID: 8036605

Claim:
A transceiver comprising: a receiver; and a transmitter, wherein the receiver includes a reception demodulator for down-converting an RF reception signal to a reception analog signal, wherein the transmitter includes a voltage controlled oscillator for transmission and a plurality of transmission blocks for generating RF transmission signals of a plurality of frequency bands, wherein each of the transmission blocks includes a frequency divider and a modulator for transmission, wherein, in each of the transmission blocks, the frequency divider supplies a pair of transmission local signals generated by dividing a transmission oscillation output signal supplied from the voltage-controlled oscillator for transmission to the modulator for transmission, wherein, in each of the transmission blocks, the modulator for transmission up-converts a transmission analog signal to an RF transmission signal by the pair of transmission local signals supplied from the frequency divider, wherein frequency dividing number of at least one frequency divider included in at least one of the transmission blocks is set to an even-numbered integer, wherein, by setting the frequency dividing number to the even-numbered integer, the corresponding pair of transmission local signals supplied from the at least one frequency divider included in the at least one transmission block to the corresponding transmission modulator become quadrature local signals substantially having a phase difference of 90 degrees, wherein another frequency dividing number of the another frequency divider included in the another transmission block in the transmission blocks are set to non-integers, wherein, by setting the another frequency dividing number to the non-integer, the another pair of transmission local signals supplied from the another frequency divider included in the another transmission block to the other transmission modulators become non-quadrature local signals having a phase difference at a predetermined offset angle from 90 degrees, and wherein the transmitter further includes a converting unit for giving a compensation offset amount having almost the same absolute value and having a polarity opposite to that of the offset angle to a pair of transmission analog signals supplied to the another transmission modulator included in the another transmission block.