32.2 A 24.25-to-29.5GHz Extremely Compact Doherty Power Amplifier with Differential-Breaking Phase Offset Achieving 23.7% PAEavg for 5G Base-Station Transceivers

• Main Authors: Oh, Hansik, Park, Seungwon, Lee, Jooseok, Baek, Seungjae, Jung, Joonho, Kim, Taewan, Kim, Jinhyun, Lee, Woojae, Park, Jae-Hong, Kim, Kihyun, Lee, Dong-Hyun, Lee, Sangho, Lee, Jeong Ho, Kim, Ji Hoon, Kim, Younghwan, Park, Sangyong, Suh, Bohee, Oh, Soyoung, Lee, Dongsoo, Jeon, Sehyug, Son, Juho, Yang, Sung-Gi
• Format: Conference Proceeding
• Language: English
• Subjects: Array signal processing; Costs; Integrated circuits; Peak to average power ratio; Phased arrays; Power amplifiers; Transceivers
• ISSN: 2376-8606
• DOI: 10.1109/ISSCC49657.2024.10454406

A beamforming phased-array has become an indispensable configuration in 5 G new-radio (NR) frequency-range-2 (FR2) cellular communications to boost an equivalent isotropic radiated power. In order to miniaturize the beamforming phased array with high output power, a beamforming transceiver IC should be highly integrated with multiple channels. Silicon-based power amplifiers (PAs) have been widely used to increase the degree of integration with transceiver ICS; however, they still suffer from low power added efficiencies at an average output power (\mathrm{PAE}_{\text {avg }}) due to large peak-to-average power ratios (PAPRs) of ~10 dB[1-3]. In order to improve the \mathrm{PAE}_{\mathrm{avg}} of the PA over the mm-wave frequency range, Doherty PAs have been considered as good candidates [4-6]. Nevertheless, the Doherty PA faces several challenges for high integration due to the following reasons: complex structure and bulky size. Especially, the extensive size immediately increases costs of a beamforming transceiver IC.