An Ultra-Compact Ku-Band Doherty Power Amplifier with a Single-Footprint Triple Two-Turn Asymmetric Combiner for 6G FR3

[Abstract] This paper presents an ultra-compact Doherty power amplifier (PA) for the 6G Frequency Range 3 (FR3) Ku band applications, featuring a miniaturized single-footprint triple two-turn (2:2:2) asymmetric transformer-based Doherty combiner. Implemented in GF22 FDX+, this Doherty PA delivers a P SAT of 21.51 dBm and a PAE 6dB of 22.17% at 12 GHz. This work reports the smallest Doherty combiner area in the Ku band, occupying only 0.032mm2(170μm×190μm). The PA also supports the broadest modulation bandwidth among the Ku-band Doherty PAs, handling 64-QAM signals up to 3800 MHz (22.8 Gb/s) and 256-QAM signals up to 1400MHz(11.2Gb/s).

Final version: https://ieeexplore.ieee.org/document/11233928