Patent ID: 8064844
Filing Date: 2011-11-22
Classification: H04B

Abstract:
1. A wireless communication apparatus by a time division duplex system comprising: an antenna, a transmission unit generating a transmission signal to be transmitted through the antenna, a reception unit demodulating the signal received through the antenna, and a transmission/reception switch unit connecting the transmission unit to the antenna during reception and connecting the reception unit to the antenna during reception, wherein: the transmission unit comprises: a transmission signal generation unit generating the transmission signal; a power amplifying unit amplifying the transmission signal generated by the transmission signal generation unit; a control signal generation unit generating a drain voltage control signal for control of a drain voltage of the power amplifying unit and a gate voltage control signal for control of a gate voltage of the power amplifying unit; and a switch unit switching off a drain power supply of the power amplifying unit during reception in a time division duplex system; the power amplifying unit sets a higher gate voltage during reception in the time division duplex system than during transmission.