Patent ID: 8644787

Claim:
An RF mixer comprising: a plurality of subchannel mixers each having an RF input port for receiving a composite RF signal carrying a plurality of individual channels on respective frequencies, a broadband impendence matched local oscillator (LO) input port for receiving a balanced LO signal, and an output port that is isolated from the RF input port and the LO input port for providing an isolated intermediate frequency (IF) signal that is isolated from the composite RF signal and the LO signal, wherein the RF input port of each of the plurality of subchannel mixers having substantially matched impedances across all the plurality of subchannel mixers; a plurality of active IF baluns each being combined with the output port of one of the plurality of subchannel mixers, wherein the active IF baluns are adapted for suppressing the isolated IF signal corresponding to one of the respective subchannel mixers and maintaining the impedance matching across the plurality of subchannel mixers; and a plurality of filters corresponding to individual channels each tuned for passing a corresponding frequency contained in the IF signal.