Receiver-Feedback-Free Cavity Resonant Wireless Power Transfer Based on <i>In Situ</i> S-Parameter Estimation Using a Parasitic Antenna
Receiver-Feedback-Free Cavity Resonant Wireless Power Transfer Based on <i>In Situ</i> S-Parameter Estimation Using a Parasitic Antenna
复制标题
基于使用寄生天线的<i>原位</i> S 参数估计的接收器无反馈腔谐振无线功率传输
DOI：
10.1109/lawp.2021.3100535
复制
发表时间：
2021
影响因子：
4.2
通讯作者：
Chida Tsukasa
中科院分区：
文献类型：
--
作者：
Murata Kentaro;Kondo Shinnosuke;Takiya Keito;Honma Naoki;Chida Tsukasa
这封信提出了一种新的腔谐振无线功率传输，可以优化寄生天线的负载条件，而无需接收器反馈或需要知道先验的S参数。在这封信中，它是假设的传输效率到接收器可以间接最大化，通过最小化在信号源处观察到的反射，所提出的方法是基于这一点。在此基础上，提出了一种基于负载调制的参数估计方法。该估计提供了用于最小化反射的封闭形式的最佳负载条件，并且避免了对具有负载扫描的蛮力搜索的需要。在200 mm的导电立方体腔中进行的实验成功地证明了所提出的方法的有效性，它获得了42.2%的高传输效率，这是可比的可实现的最大值。
This letter proposes a novel cavity resonant wireless power transfer that can optimize the load condition of a parasitic antenna without receiver feedback or the need to know the S-parametera priori. In this letter, it is hypothesized that the transmission efficiency to a receiver can be indirectly maximized by minimizing reflection observed at the signal source, and the proposed method is based on this. Furthermore, anin situS-parameter estimation based on load modulation is proposed. This estimation provides a closed-form optimum load condition for minimizing reflection, and avoids the need for a brute force search with load sweeping. Experiments carried out in a 200 mm conductive cube cavity successfully demonstrate the effectiveness of the proposed method, which obtains a high transmission efficiency of 42.2% that is comparable to the achievable maximum.