This paper presents a bi-level quadraturemodulation (QM) low-pass (LP) envelope-pulse-widthmodulation (EPWM) transmitter using a half side of tri-level EPWM. Simulation including digital signal processing with the QM LP-EPWM and microwave circuit simulation with a class-D power amplifier (PA) using n-MOSFETs shows an excellent error vector magnitude (EVM) of 36 dB at 1 GHz. The transmitter with a class-D PA for bi-level EPWM signal shows much better EVM performance than the one for trilevel signal.Index Terms -transmitterpower amplifierclass-D envelope pulse-width modulationquadrature modulation, error vector magnitudepower-added efficiency
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