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This paper presents a high efficiency envelope tracking (ET) GaN power amplifier (PA) operated at 880MHz, for wide bandwidth signals. Using a 16-QAM 20MHz bandwidth LTE signal with 6.6dB PAPR, a 54.4% drain efficiency and 52.8% power added efficiency (PAE), including both the envelope amplifier (EA) and the RF-PA, were measured, along with a 15.3dB gain and 7.4-W output power. The corresponding EVM...
This paper presents a high performance BCD (Bipolar-CMOS-DMOS) monolithic envelope tracking IC to achieve high efficiency and linearity for micro-base station power amplifier applications. Measurement of the BCD high voltage (Vdd = 15 V) envelope amplifier shows an efficiency of 72% using WCDMA input signals (7.7 dB PAR). An envelope tracking power amplifier including a GaN FET RF stage has overall...
A wideband high dynamic range frequency hopping transceiver is presented for the Joint Tactical Radio System (JTRS) project at the University of California, San Diego. The transceiver utilizes radio frequencies (RF) from 200 MHz to 3.2 GHz and provides a 78 dB maximum dynamic range. The rapid frequency hopping local oscillator (LO) is achieved by Direct Digital Synthesis (DDS) and successive frequency...
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