A Bandwidth-Optimized Transformer-Based Doherty Power Amplifier for 5G Power Class 2 Handset operation at 2.2 GHz-2.7 GHz
- Resource Type
- Conference
- Authors
- Imai, Shohei; Okabe, Hiroshi; Tanaka, Satoshi
- Source
- 2021 IEEE MTT-S International Microwave Symposium (IMS) Microwave Symposium (IMS), 2021 IEEE MTT-S International. :791-794 Jun, 2021
- Subject
- Fields, Waves and Electromagnetics
Microwave measurement
Circuit topology
5G mobile communication
Gallium arsenide
Power amplifiers
Telephone sets
Distortion
wideband
Doherty amplifier
power amplifier
- Language
- ISSN
- 2576-7216
This study presents a transformer-based Doherty combiner for a wideband Doherty amplifier suitable for use in a handset. The circuit topology configuration is based on closed-form equations. Circuit element values are optimized for wideband operation. An amplifier incorporating the combiner is fabricated with a laminated board and GaAs chip, and subsequently evaluated using 100 MHz bandwidth 5G signals. The amplifier operates in the range of 2.2-2.7 GHz with more than 35% efficiency and adequately low distortion when assisted by memory-less digital pre-distortion.