Equivalent Circuit Model Analysis of Artificial Electromagnetic Metamaterials Loaded with Plasma

In this paper, the equivalent circuit model is proposed for the analysis of an Jerusalem cross artificial electromagnetic metamaterial structure embedded in a plasma layer. For this, a method combining full-wave simulation and microwave network theory is adopted to simulate the reflection coefficient curve of the metamaterial loaded with plasma in a frequency range of 1–30 GHz. The parameters of circuit elements are extracted using the genetic algorithm, so that the reflection coefficient calculated using the equivalent circuit model and the curve obtained by CST software simulation almost coincide within a selected frequency range. The equivalent circuit model theory will theoretically predict the electromagnetic properties of plasma artificial electromagnetic metamaterials, and provide theoretical guidance for artificial design of plasma artificial electromagnetic metamaterials.