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In this paper, a Doherty power amplifier for K-band point-to-point microwave radio, developed in TriQuint GaAs PWR pHEMT monolithic technology, is presented. Highly efficient driver stages on both the main and auxiliary branches have been designed and optimized to boost gain with minimal impact on power-added efficiency. The selected architecture enables a modular combination...
Digital Pre-distortion (DPD) has been demonstrated to significantly improve linearity while increasing efficiency and average output power in microwave Point-to-Point power amplifiers, such as those used in microwave backhaul for cellular communication systems. By applying Digital Pre-distortion to a three-stage 15 GHz amplifier, linearity was improved more than 20 dB, efficiency at back off was improved...
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