Abstract
Summary form only given, as follows. In this paper, a digital predistorted inverse class-F GaN power amplifier with novel PAPR reduction technique is presented, in which not only peaks but also valleys of signal are clipped to reduce the PAPR as much as possible. The inverse class-F PA is implemented with Cree's CGH40010 GaN HEMT which delivers output power of 10 W. For a 20 MHz wideband OFDM signal, adjacent channel power ratio (ACPR) of the proposed PA decreases from −35.4 dBc to −51.9 dBc, and drain efficiency of the PA is 31.3% at an average output power of 33.6 dBm.
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