Envelope-tracking-based Doherty power amplifier |
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| Authors: | Mury Thian Peter Gardner |
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| Affiliation: | 1. Department of Electronic, Electrical and Computer Engineering , University of Birmingham , Edgbaston, Birmingham, B15 2TT, United Kingdom m.thian@qub.ac.uk;3. Department of Electronic, Electrical and Computer Engineering , University of Birmingham , Edgbaston, Birmingham, B15 2TT, United Kingdom |
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| Abstract: | From the instantaneous efficiency plot, it is observed that the conventional 2-stage Doherty power amplifier (DPA) with high upper power dynamic range (>12 dB) suffers from a substantial dip in the middle of the upper power regime, thus reducing the average efficiency. In this study, an envelope-tracking-based DPA is proposed in order to minimise this dip by adjusting the drain bias voltage of the auxiliary amplifier of the DPA proportional to the input power level. |
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| Keywords: | Doherty power amplifier efficiency enhancement envelope tracking probability density function RF and microwave electronics |
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