A wireless transceiver includes an antenna, a filter, a radio frequency (RF) signal processing circuit, a shared amplifying circuit, a first switch circuit, a second switch circuit, a sending power amplifier, and a single-pole double-throw (SPDT) switch. The filter is connected between the antenna and the SPDT switch. The RF signal processing circuit outputs a first control signal when the antenna is utilized to send RF signals, and outputs a second control signal when the antenna is utilized to receive RF signals. The first switch circuit is connected between the shared amplifying circuit and the sending power amplifier, and switches on according to the first control signal. The second switch circuit is connected between the shared amplifying circuit and the SPDT switch, and switches on according to the second control signal. The SPDT switch selectively connects the filter to the sending power amplifier or the second switch circuit.