Patent ID: 7082169

Claim:
A method for signal up-conversion, comprising: providing a first modulated signal and a second modulated signal to a first phase shifter; providing the first modulated signal and the second modulated signal to a second phase shifter; altering the phase of the first modulated signal by an amount related to the magnitude of the second modulated signal so that the first phase shifter and the second phase shifter each provide a phase-altered version of the first modulated signal, wherein the phase-altered version of the first modulated signal supplied by the first phase shifter and the second phase shifter are altered by the same amount of phase, but each with opposite sign; supplying the output of the first phase shifter and the second phase shifter to a pair of translation loops; upconverting the phase-altered version of the first modulated signal in a first of the pair of translation loops; upconverting the phase-altered version of the first modulated signal in a second of the pair of translation loops; and combining the outputs of the first and second translation loops where the combined signal represents the first and second modulated signals.