1. A Broadband High-Efficiency Power Amplifier by Using Branch Line Coupler
- Author
-
Zhiqun Cheng, Zhiwei Zhang, Guohua Liu, and Ke Huajie
- Subjects
Physics ,business.industry ,Amplifier ,Bandwidth (signal processing) ,Electrical engineering ,020206 networking & telecommunications ,02 engineering and technology ,Condensed Matter Physics ,Branch line coupler ,Broadband ,0202 electrical engineering, electronic engineering, information engineering ,Electrical and Electronic Engineering ,business ,Drain efficiency ,Electrical impedance ,Harmonic impedance ,Electronic circuit - Abstract
This presents a broadband high-efficiency power amplifier (PA). The branch line coupler is used to design the output circuits of the PA. By appropriately selecting the impedance conditions of terminal ports, the branch line coupler can not only realize impedance conversion but also realize harmonic impedance control. Two-stage couplers are exploited to expand the working bandwidth. To verify the effectiveness of the proposed method, a broadband high-efficiency PA is designed and fabricated by using CGH40010F. Measurements demonstrate that the saturated output power is from 41.0 to 42.5 dBm, the drain efficiency is between 64% and 75%, and the gain is from 10.2 to 11.5 dB.
- Published
- 2020