Patent ID: 8385852

Claim:
A phase correction apparatus in a wireless transmitter for converting a first signal into a wireless signal and amplifying the wireless signal by a power amplifier, the phase correction apparatus comprising: a quadrature-phase modulator for modulating an in-phase component and a quadrature-phase component of the first signal by a first carrier signal; a quadrature-phase demodulator for demodulating a returned signal returned from an output of the power amplifier by a second carrier signal and generating a second signal including an in-phase component and an quadrature-phase component; a phase detector for detecting a phase error between the first signal and the second signal based on the in-phase components and the quadrature-phase components of the first signal and the second signal; and a phase shifter group for performing a phase shift based on the phase error, the phase shifter group including a first phase shifter for performing a phase shift on any of the first signal, the second signal, the first carrier signal, and the second carrier signal and a second phase shifter for shifting a phase of the first signal.