Harmonic rejective passive up converter

摘要

Methods and apparatuses are presented for harmonic reject upconverting a baseband signal using at least one quadrature passive upconversion mixer. In some embodiments, an apparatus may include a first quadrature passive mixer configured to receive a first baseband input and a first LO input, and a second quadrature passive mixer configured to receive a second baseband input and a second LO input. A first output of said first passive mixer may be directly connected to a first output of said second passive mixer and together coupled to a first amplifier input. A second output of said first passive mixer may be directly connected to a second output of said second passive mixer and together coupled to a second amplifier input. The transmitter may be configured to output an upconverted signal with at least one rejected harmonic spurious mixing product based on the first and second amplifier inputs.

主权项

1. An apparatus for harmonic reject upconverting a baseband signal using at least one quadrature passive mixer, the apparatus comprising:
a first quadrature passive mixer configured to receive quadrature baseband signals as a first baseband input and a first set of multi-phase local oscillator (LO) signals as a first LO input; a second quadrature passive mixer configured to receive said quadrature baseband signals as a second baseband input and a second set of multi-phase LO signals as a second LO input; an amplifier comprising a first amplifier input, a second amplifier input, and an amplifier output; and a transmitter comprising a transmitter output; wherein: said first and second quadrature passive mixers both comprise first and second outputs; said first output of said first quadrature passive mixer is directly connected to said first output of said second quadrature passive mixer and together is coupled to said first amplifier input; said second output of said first quadrature passive mixer is directly connected to said second output of said second quadrature passive mixer and together is coupled to said second amplifier input; and said amplifier output is coupled to said transmitter output, said transmitter output is configured to output an upconverted signal with at least one rejected harmonic spurious mixing product based at least in part on the first and second amplifier inputs.