Method of converting frequency of intermediate frequency signal, involves phase-shifting one of the partial signals of intermediate frequency signal with respect to other partial signal and mixing with local oscillator signal

摘要

The method involves dividing an intermediate frequency signal (ZF') into partial signals (ZF1,ZF2) and feeding the partial signals to respective mixers (M1,M2). The partial signal (ZF2) is phase-shifted by 180[deg] in relation to the partial signal (ZF1). The local oscillator signals (LO1,LO2) are mixed with the partial signals to provide output signals (HF1,HF2). A combination signal representing frequency-converted intermediate frequency signal is formed by combining the output signals.