Harmonic rejective passive up converter

A method for harmonic reject upconverting a baseband signal using at least one quadrature passive mixer, the method comprising:

• receiving quadrature baseband signals as a first baseband input and a first set of multi-phase local oscillator (LO) signals as a first LO input;
• receiving said quadrature baseband signals as a second baseband input and a second set of multi-phase LO signals as a second LO input;
• generating a first upconverted output and a first inverse upconverted output, both using the first baseband input and the first LO input;
• generating a second upconverted output and a second inverse upconverted output, both using the second baseband input and the second LO input;
• directly connecting the first upconverted output to the second upconverted output and applying said result to a first amplifier input;
• directly connecting the first inverse upconverted output to the second inverse upconverted output and applying said result to a second amplifier input;
• and
• transmitting an upconverted signal with at least one rejected harmonic spurious mixing product based at least in part on the first and second amplifier inputs.

An apparatus for harmonic reject upconverting a baseband signal, the apparatus comprising:

• means for receiving quadrature baseband signals as a first baseband input and a first set of multi-phase local oscillator (LO) signals as a first LO input;
• means for receiving said quadrature baseband signals as a second baseband input and a second set of multi-phase LO signals as a second LO input;
• means for generating a first upconverted output and a first inverse upconverted output, both using the first baseband input and the first LO input;
• means for generating a second upconverted output and a second inverse upconverted output, both using the second baseband input and the second LO input;
• means for directly connecting the first upconverted output to the second upconverted output and applying said result to a first amplifier input;
• means for directly connecting the first inverse upconverted output to the second inverse upconverted output and applying said result to a second amplifier input;
• and
• means for transmitting an upconverted signal with at least one rejected harmonic spurious mixing product based at least in part on the first and second amplifier inputs.