Abstract
In this paper, a digital predistorted inverse class-F GaN power amplifier with novel PAPR reduction technique, in which not only peaks but also valleys of signal are clipped to reduce the PAPR as much as possible, is presented. The inverse class-F PA is implemented by using Cree's CGH40010 GaN HEMT with a 10W output power. Measurement results show that ACPR of the proposed PA decreases from -35.4dBc to -51.9dBc for a wideband OFDM signal with 20MHz bandwidth and 8dB PAPR after PAPR reduction. Drain efficiency of the PA is 31.3% at an average output power of 33.6dBm.
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