A 65% efficient envelope tracking radio-frequency power amplifier for orthogonal frequency division multiplex

A high-efficiency radio-frequency (RF) power amplifier (PA) is described for high peak-to-average power ratio (PAPR) orthogonal frequency division multiplexed signals. Envelope tracking is used, where the supply voltage of an RF amplifier is modulated in harmony with the envelope of the RF signal. T...

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Veröffentlicht in:	IET microwaves, antennas & propagation antennas & propagation, 2015-05, Vol.9 (7), p.676-681
Hauptverfasser:	Watkins, Gavin Tomas, Mimis, Konstantinos
Format:	Artikel
Sprache:	eng
Schlagworte:	3G mobile communication 3rd generation partnership project long‐term evolution signal Amplification DC‐to‐RF efficiency digital switching envelope modulator envelope tracking radio‐frequency power amplifier Envelopes frequency 300 MHz Frequency division high‐efficiency radio‐frequency power amplifier hybrid amplifier linear amplifier Long Term Evolution low‐frequency content LTE envelope signal Microwave antennas Modulators Multiplexing OFDM modulation orthogonal frequency division multiplex PAPR peak‐to‐average power ratio orthogonal frequency division multiplexed signals Power amplifiers radiofrequency power amplifiers split‐frequency design supply voltage switched mode power supply telecommunication power supplies telecommunication switching Tracking transformer coupled push‐pull structure transformers
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