The most widely adopted category of the mid-range wireless power transmission (WPT) systems is based on the magnetic resonance coupling (MRC), which is appropriate for a very wide range of applications. The primary concerns of the WPT/MRC system design are the power transfer capabilities. Using the scattering parameters based on power waves, the power transfer of an asymmetric WPT/MRC system with the series-series compensation structure is studied in this paper. This approach is very convenient since the scattering parameters can provide all the relevant characteristics of the WPT/MRC system related to power propagation. To maintain the power transfer capability of the WPT/MRC system at a high level, the scattering parameter $S_{21}$ is used to determine the operating frequency of the power source. Nevertheless, this condition does not coincide with the maximum possible power transfer efficiency of the system. In this regard, the WPT/MRC system is thereafter configured with a matching circuit, whereas the scattering parameter $S_{21}^{\prime }$ S21’is used to calculate and then adjust the matching frequency of the system. This results in the maximum available power transfer efficiency and thereby increases the overall performance of the system. Theoretical investigations are followed by numerical simulation and experimental validation.

中文翻译：

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基于散射参数的非对称无线传输系统的功率传输分析

中程无线电力传输（WPT）系统中使用最广泛的类别是基于磁共振耦合（MRC），它适用于非常广泛的应用。WPT / MRC系统设计的主要关注点是功率传输能力。利用基于功率波的散射参数，研究了具有串联补偿结构的非对称WPT / MRC系统的功率传递。这种方法非常方便，因为散射参数可以提供WPT / MRC系统与功率传播有关的所有相关特征。为了保持WPT / MRC系统的高功率传输能力，散射参数${\mathrm{小号}}_{\mathrm{21岁}}$用于确定电源的工作频率。但是，此条件与系统的最大可能功率传输效率不一致。在这方面，WPT / MRC系统此后配置有匹配电路，而散射参数${\mathrm{小号}}_{\mathrm{21岁}}^{\prime }$S21'用于计算然后调整系统的匹配频率。这导致最大的可用功率传输效率，从而提高了系统的整体性能。理论研究之后是数值模拟和实验验证。