A novel equivalent circuit model for an artificial magnetic conductor (AMC) made of curved coupled microstrip line (CCML) wideband resonators is presented. In the proposed method, the effects of substrate thickness and permittivity is explicitly accounted in both the ground-terminated line and frequency selective surface of the AMC, which leads to a more accurate model compared to the previous ones. In addition, closed-form formulas predicting the behaviour of the AMC versus geometrical parameters are provided. The dependence of the equivalent circuit parameters on the excitation frequency is discussed and the wideband behaviour of the CCML based AMC is justified. The validity and application of the model is demonstrated via full-wave electromagnetic simulations and design examples.

提出了由弯曲耦合微带线（CCML）宽带谐振器制成的人造磁导体（AMC）的新型等效电路模型。在提出的方法中，基板厚度和介电常数的影响在AMC的接地端线和频率选择表面中都得到了明确考虑，与以前的模型相比，这导致了更精确的模型。另外，提供了预测AMC与几何参数行为的封闭形式公式。讨论了等效电路参数对激励频率的依赖性，并证明了基于CCML的AMC的宽带行为。通过全波电磁仿真和设计实例证明了该模型的有效性和应用。