Dual-mode charge pump with second-harmonic readout for antenna alignment in wireless power transfer system

被引：4
|
作者：
Zhang, Hao [1 ,3 ]
Guo, Yong-Xin [2 ]
Wu, Wen [1 ]
机构：
[1] Nanjing Univ Sci & Technol, Ministerial Key Lab JGMT, Nanjing 210094, Jiangsu, Peoples R China
[2] Natl Univ Singapore, Dept Elect & Comp Engn, 4 Engn Dr 3, Singapore 117576, Singapore
[3] Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 117583, Singapore
来源：
ELECTRONICS LETTERS | 2019年 / 55卷 / 03期
基金：
新加坡国家研究基金会;
关键词：
D O I：
10.1049/el.2018.6572
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：
A charge pump is presented by integrating two identical voltage doublers and a modified rat-race coupler to enable its dual-mode operations: radio-frequency (RF)-to-direct current (dc) power conversion and second-harmonic readout. Due to the property of the modified rat-race coupler, it is able to differentially divide incident RF signals for successive voltage doublers' high-efficiency rectification, and couple second harmonics for readout in two highly isolated channels. Output dc voltages are combined in parallel on a single load resistance for more practicality. Experimental validations are demonstrated by both simulation and measurement with a maximum RF-to-dc power conversion efficiency of 71.3% and -14.2 dBm second-harmonic generation with an incident signal power of 19 dBm. This dual-mode charge pump brings a prospect for antenna alignment in the wireless power transfer system by further exploiting second harmonics.
引用
收藏
页码：146 / 147
页数：2
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