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- Title
Efficiency‐enhanced Doherty power amplifier using Chireix‐like compensation technology.
- Authors
Zhang, Zhiwei; Cheng, Zhiqun; Liu, Guohua; Ke, Huajie; Sun, Hao; Gao, Steven
- Abstract
This article presents a novel efficiency‐enhanced Doherty power amplifier (DPA) by using a Chireix‐like compensation technique. This technique introduces a compensation circuit structure at the combiner to offset the phase difference effect of a DPA for enhancing drain efficiency. A DPA based on the proposed structure is fabricated with two 10 W GaN high electron mobility transistor (HEMT) transistors. The fabricated DPA with such proposed compensation structure manifests a measured saturated output power of 43.5 dBm and drain efficiency of 68% to 71% in the frequency range of 3.2 to 3.7 GHz. Forty‐five percent of drain efficiency can be achieved at 6 dB power back‐off. And the adjacent channel leakage ratio (ACLR) is better than −48.6 dBc with digital predistortion.
- Subjects
POWER amplifiers; MODULATION-doped field-effect transistors; WAGES; TRANSISTORS
- Publication
International Journal of RF & Microwave Computer-Aided Engineering, 2019, Vol 29, Issue 11, pN.PAG
- ISSN
1096-4290
- Publication type
Article
- DOI
10.1002/mmce.21949