Improving Power Amplifier Efficiency and Linearity Using a Dynamically Controlled Tunable Matching Network

@article{Fu2008ImprovingPA,
  title={Improving Power Amplifier Efficiency and Linearity Using a Dynamically Controlled Tunable Matching Network},
  author={Jia-Shiang Fu and Amir Mortazawi},
  journal={IEEE Transactions on Microwave Theory and Techniques},
  year={2008},
  volume={56},
  pages={3239-3244}
}
This paper presents a tunable matching network that enhances both efficiency and linearity of power amplifiers (PAs). A medium-power amplifier with a varactor-based matching network is designed, fabricated, and tested. It is demonstrated that not only the power efficiency at reduced drive levels can be improved but also the AM-AM and AM-PM distortions of the PA are reduced when the tunable matching network is biased according to the input drive level. Moreover, under 3GPP WCDMA modulated input… CONTINUE READING
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