Michael Paynter

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This paper examines the effect of variations in the extrinsic parameters of GaN PA models due to process variation on the estimation of efficiency and output power. Simple measurement and modelling procedures are proposed in order to allow the full investigation of these effects which are applied to a Class-F design procedure. It was found that device(More)
This paper proposes a novel GaN HEMT non-linear model extraction method from small-signal cold S-parameters and large signal waveform measurements, here demonstrated in simulation. These waveform measurements are taken in simple 50Ω conditions, but will be shown to be suitable for switching-mode power amplifier (PA) designs. Class-F and Continuous(More)
The findings and conclusions in this document are those of the authors, who are responsible for its content; the findings and conclusions do not necessarily represent the views of AHRQ. Therefore, no statement in this report should be construed as an official position of AHRQ or of the U.S. Department of Health and Human Services. The information in this(More)
The classical Doherty configuration suffers from a lack of accurate control of the load impedance performed by the peaking stage. The result is a reduction in the maximum obtainable efficiency and linearity performance for a given input power level. By driving the carrier and peaking power amplifiers independently, it is possible to present the optimum load(More)
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