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To realize the wideband DPA above 3GHz. the frequency dependency compensating circuit and the λ ۴ inverter incorporating parasitic elements inside package were proposed. The feasibility of the approach was verified by measurement results. and it achieved 45.9- 50.2 % drain efficiency with -50 dBc ACLR over the 3.0- 3.6 GHz under 20 MHz LTE signal after DPD. The use of the wideband efficient GaN DPA can reduce the complexity and energy consumption of radio. which further helps reducing TCO of base stations.
