Efficiency Enhancement of Power Amplifier Using Power Pulsewidth Modulation for Wireless Power Transfer

被引：2

作者：

Yang, Chen ^{[1
]}

Jin, Ke ^{[1
]}

Zhou, Weiyang ^{[1
]}

Hu, Huan ^{[1
]}

Zhu, Xirui ^{[2
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Coll Automat Engn, Nanjing 210016, Peoples R China

[2] Aerosp Syst Engn Shanghai, Shanghai 200240, Peoples R China

来源：

IEEE MICROWAVE AND WIRELESS TECHNOLOGY LETTERS | 2024年 / 34卷 / 09期

基金：

中国国家自然科学基金;

关键词：

Drain efficiency (DE); power amplifier (PA); power pulsewidth modulation (PPWM); wireless power transfer (WPT); ENVELOPE ELIMINATION;

D O I：

10.1109/LMWT.2024.3423760

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Power amplifier (PA) is the core device for dc-RF conversion in wireless power transfer (WPT) system. However, the drain efficiency (DE) of PA decreases significantly due to the load mismatch effect at low output power levels. In this letter, a power pulsewidth modulation (PPWM) power supply is proposed to enhance the wide-power-range efficiency of PA. In this way, the average output power demand is met, and the maximum DE can always be achieved when the output power backs off. A prototype comprising a driver amplifier, a 5.8-GHz/10-W class-F PA and a 30-W PPWM power supply is fabricated and tested in the lab. Experimental results and performance comparison are provided to verify the effectiveness of the proposed method.

引用

页码：1099 / 1102

页数：4

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