This paper presents the design of a resonant system for in vitro studies to emulate the exposure of a monolayer of cells to a wireless power transfer system operating at 13.56 MHz. The design procedure targets a system, which maximizes the specific absorption rate (SAR) uniformity on the plane where the layer is cultured, as well as SAR efficiency (defined as SAR over the input power), within the size constraints of a standard incubator. Three resonant wireless power transfer systems with different commonly used loop/coil geometries (cylindrical with circular and square cross‐sections and annular) were compared with assess the configuration maximizing the considered design criteria. The system performance in terms of reflection and transmission coefficients, as well as generated E‐ and H‐fields, was characterized numerically and experimentally inside the incubator. Moreover, SAR was computed at the monolayer level. The system equipped with cylindrical coils with square cross‐sections led to a high electromagnetic field uniformity in in vitro biological samples. In particular, the uniformities in E and SAR at the layer level were within 7.9% and 5.5%, respectively. This was achieved with the variation in H below the usually considered ±5% limit. © 2020 Bioelectromagnetics Society

中文翻译：

---

一个用于体外研究的共振系统，可模拟13.56 MHz的无线功率传输暴露。

本文介绍了用于体外研究的共振系统的设计，以模拟单层细胞暴露于以13.56 MHz运行的无线电力传输系统。设计程序的目标系统是，在标准培养箱的尺寸限制内，将培养层的平面上的比吸收率（SAR）均匀性以及SAR效率（定义为输入功率之上的SAR）最大化。比较了三种具有不同常用环路/线圈几何形状（具有圆形和正方形横截面以及环形的圆柱）的谐振无线电力传输系统，并评估了使设计标准最大化的配置。根据反射和透射系数以及生成的电场和磁场，系统的性能 在培养箱内进行了数值和实验表征。此外，SAR是在单层水平上计算的。该系统配备具有方形横截面的圆柱形线圈，从而在体外生物样品中实现了很高的电磁场均匀性。特别地，在层水平上的E和SAR的均匀度分别在7.9％和5.5％之内。这是通过使H的变化低于通常认为的±5％极限来实现的。©2020生物电磁学会 这是通过使H的变化低于通常认为的±5％极限来实现的。©2020生物电磁学会 这是通过使H的变化低于通常认为的±5％极限来实现的。©2020生物电磁学会