Maximum efficiency tuning of microwave amplifiers

Maximum-efficiency tuning conditions for a microwave power amplifier are determined by a statistical impedance matching method. A physics-based MESFET simulator is used to predict optimum device performance. The sensitivity of efficiency to variations in source harmonic impedance matching is described and shown to be significant. Simulations indicate that proper harmonic tuning can achieve power-added efficiencies of approximately=80% at 5 GHz.<
>