Second Harmonic Exploitation for High-Efficiency Wireless Power Transfer Using Duplexing Rectenna
Second Harmonic Exploitation for High-Efficiency Wireless Power Transfer Using Duplexing Rectenna
复制标题
使用双工整流天线利用二次谐波实现高效无线功率传输
DOI：
10.1109/tmtt.2020.3039604
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发表时间：
2021
影响因子：
4.3
通讯作者：
Chaoyun Song
中科院分区：
文献类型：
--
作者：
S. Joseph;Yi Huang;S. Hsu;Ahmed Alieldin;Chaoyun Song
在这篇文章中，提出了一种新型的具有谐波反馈能力的整流天线，用于高效的无线功率传输（WPT）应用。所提出的整流天线可以有效地收集输入的射频（RF）能量，并且还利用固有的谐波信号，该谐波信号被发送回RF发射器（Tx）用于定位，以便引导来自Tx天线阵列的辐射图案以获得最佳WPT。基于顶部加载和容性间隙效应，设计了一种新型双振子天线。它用于接收基频为0.915 GHz的射频功率，并发射1.83 GHz的二次谐波信号作为反馈。一个完整的WPT系统与光束扫描能力的实验验证已经进行。结果表明，所制造的整流器已经实现了最大的RF-DC转换效率为71%（在15 dBm的输入功率）和测量的峰值二次谐波功率为−1 dBm。因此，所提出的整流天线可以通过提供其位置信息来形成闭环系统，以用于高效的WPT应用。
In this article, a novel duplexing rectenna with harmonic feedback capability is proposed for efficient wireless power transfer (WPT) applications. The proposed duplexing rectenna can harvest the incoming radio frequency (RF) energy efficiently and also make use of an inherent harmonic signal, which is sent back to the RF transmitter (Tx) for positioning in order to guide the radiation patterns from Tx antenna array for optimum WPT. A novel duplexing dipole antenna is designed based on the top loading and capacitive gap effects. It is used to receive RF power at fundamental frequency 0.915 GHz and transmit the second harmonic signals at 1.83 GHz as a feedback. Experimental validation of a complete WPT system with beam-scanning capability has been carried out. It is shown that the fabricated rectifier has realized a maximum RF-dc conversion efficiency of 71% (at 15-dBm input power) and a measured peak second harmonic power of −1 dBm. Thus, the proposed duplexing rectenna can form a closed-loop system by providing its location information for efficient WPT applications.