High-Efficiency Envelope-Tracking W-CDMA Base-Station Amplifier Using GaN HFETs

  title={High-Efficiency Envelope-Tracking W-CDMA Base-Station Amplifier Using GaN HFETs},
  author={Donald F. Kimball and Jinho Jeong and Chin Hsia and Peter Draxler and Sandro Lanfranco and W. Nagy and K. Linthicum and L. Larson and P. M. Asbeck},
  journal={IEEE Transactions on Microwave Theory and Techniques},
A high-efficiency wideband code-division multiple-access (W-CDMA) base-station amplifier is presented using high-performance GaN heterostructure field-effect transistors to achieve high gain and efficiency with good linearity. For high efficiency, class J/E operation was employed, which can attain up to 80% efficiency over a wide range of input powers and power supply voltages. For nonconstant envelope input, the average efficiency is further increased by employing the envelope-tracking… CONTINUE READING
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