RADIO COMMUNICATION APPARATUS HAVING A HIGH RECEIVING SENSITIVITY

摘要

An intermediate frequency section converts the transmission signal into an intermediate frequency signal. An intermediate filter section filters the intermediate frequency signal into a filtered signal. A demodulating section demodulates the filtered signal into a demodulated signal. The intermediate frequency filter section comprises an intermediate frequency filter for filtering the intermediater frequency signal into the filtered signal and a matching section for matching each of the intermediate frequency section and the demodulating section to the intermediate frequency filter. The matching section has a variable circuit constant. A connecting section connects a transmission section to the reception section. A supplying section supplies the transmission section to an input signal to make the transmission section produce the transmission signal in accodance with the input signal. The supplying section adjusts the variable circuit constant in accordance with the input signal and the demodulated signal.