Voltage-Combined CMOS Doherty Power Amplifier Based on Transformer

This paper presents a voltage-combined CMOS Doherty power amplifier (PA) based on a transformer. The dynamic load modulation of the two-way transformer is analyzed in detail. A comparison between the current- and voltage-combined Doherty PAs shows that the Doherty PA based on a voltage-combining method delivers a broad bandwidth (BW) with a larger load tolerance. The proposed Doherty PA achieves c...