FEQUENCY CONVERTER FOR MULTI-SIGNAL

摘要

PURPOSE: A frequency converting apparatus is provided to reduce the complexity of a circuit by reducing the number of bandpass filters provided by signals. CONSTITUTION: A frequency converting apparatus includes a plurality of the first mixers(211) for converting respective signals into given same medium center frequencies(CFb) for a plurality of signals having different bandwidth and the center frequency. A plurality of first bandpass filters(212) remove harmonics of the medium center frequency signal from the plurality of first mixer(211). The second single mixer(221) adds respective output signals of the plurality of first bandpass filters(212) to convert them into target center frequency(CFc) signals. The second single bandpass filter(222) removes harmonics of the target center frequency signal from the second mixer(221).