Very High Frequency Power Switching: A Road Map To Envelope Tracking

Very High Frequency Power Switching: A Road Map To Envelope Tracking

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RF (Radio Frequency) GaN transistors may be used for power switching at frequencies demonhorns edge of 30 MHz and above, thereby reaching voltage control bandwidth of critical interest for the so-called ET (Envelope Tracking) technique.ET is meant at optimising the efficiency of RF amplifiers by supplying them with a voltage adapted to their power level at any time, and is the subject of many R&D works worldwide.The present paper provides swordback hold d2 an overview on the different activities run at the European Space Agency so far in this context, and present the possible way-forward to embark ET on future spacecraft.