Envelope tracking (ET) for radio frequency (RF) amplifiers is not new. But with the ever increasing need for improved cell phone battery life, better base station energy efficiency, and more output power from very costly RF transmitters, the need for improving the RF Power Amplifier (PA) system efficiency through ET has become an intense topic of research and development.

We demonstrate what power and efficiency levels are readily realizable using eGaN FETs in a buck converter for high power envelope tracking applications.

By Johan Strydom, Ph.D., Vice President of Applications, EPC Power Electronics Technology

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