In order to achieve rapid and simple non-destructive testing of water trees in materials, a novel water tree characterisation method based on the complementary split ring resonators (CSRR) was proposed. The characteristics of circular CSRR and rectangular CSRR were analysed in high-frequency electromagnetic simulation software. The resonant frequency of CSRR was found to be correlated to the dielectric constant of the materials. In addition, the lumped equivalent circuit parameters of CSRRs were also calculated and simulated. The results of electromagnetic simulations and circuit simulations achieved good consistency. In the experimental part, sensors based on the two kinds of CSRRs were fabricated and were used to detect the water tree defects in low-density polyethylene samples. The experiment results showed that the method of using CSRR sensors to detect water tree is feasible.

中文翻译：

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基于互补开口环谐振器传输特性的水树表征新方法

为实现材料中水树的快速、简单无损检测，提出了一种基于互补开口环谐振器（CSRR）的水树表征方法。在高频电磁仿真软件中分析了圆形CSRR和矩形CSRR的特性。发现 CSRR 的谐振频率与材料的介电常数相关。此外，还计算和仿真了 CSRR 的集总等效电路参数。电磁仿真和电路仿真的结果达到了良好的一致性。在实验部分，制作了基于两种CSRR的传感器，用于检测低密度聚乙烯样品中的水树缺陷。