Equivalent circuit model of a coaxial probe-fed quasi-lumped element resonator antenna is proposed. The proposed resonator is a periodic interdigital lumped element structure whose resonance does not depend on the electrical length but instead on some intrinsic circuit components, with attendant small size as a premium. The derived equivalent circuit components are extracted using the Agilent Advance Design System (ADS) software. The equivalent circuit model of the coaxial-feed probe is derived based on the simplest uniform-current model of a coaxial probe based on assumption that 1) all the higher-order evanescent have been included analytically in the parasitic circuit elements, and 2) only the propagating modes needs to be considered. The entire structure is further investigated using numerical EM solver such as finite integration technique (FIT) method in order to further compare the level of agreement. The derived equivalent circuit model has been validated by analytical formulae, numerical simulations, and measurement-based method.

中文翻译：

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同轴探头馈电准集总元件谐振天线等效电路模型

提出了同轴探头馈电准集总元件谐振器天线的等效电路模型。所提出的谐振器是一种周期性的叉指集总元件结构，其谐振不依赖于电气长度，而是依赖于一些固有的电路元件，伴随着小尺寸的优势。使用安捷伦高级设计系统 (ADS) 软件提取导出的等效电路组件。同轴馈电探头的等效电路模型是基于最简单的同轴探头均匀电流模型推导出来的，该模型基于以下假设：1) 所有高阶倏逝都已被解析地包含在寄生电路元件中，并且 2) 仅需要考虑传播模式。使用数值电磁求解器（例如有限积分技术 (FIT) 方法）进一步研究整个结构，以进一步比较一致性水平。导出的等效电路模型已通过解析公式、数值模拟和基于测量的方法进行验证。