圆极化罩的等效电路模型与设计

Equivalent Circuit Model and Design of Circular Polarizer

给出了多层圆极化罩的等效电路模型和一种设计方法,直接对圆极化罩的等效电路模型进行求解,求解出满足形成圆极化的电路导纳值,根据导纳求解值和电磁场软件仿真可以非常容易地确定每层金属栅的结构参数。基于文中给出的设计方法,分析设计了常用的2层、3层和4层圆极化罩,给出了设计结果和仿真结果,仿真结果和设计结果非常吻合,验证了设计方法的正确性。这种基于电路求解的设计方法具有突出优点:原理清晰、设计简单且设计结果非常准确。

This paper presents the equivalent circuit model and a new design method for multi-layer circular polarizer. This new method is to solve the equivalent circuit model directly. As a result, the admittances are solved. According to the admittances, electromagnetic simulation software is used to determine the structure parameters of each layer metal grid plate. Based on the method introduced in the paper, three kinds of conventional circular polarizer which are two layers,three layers and four layers circular polarizers are analyzed and designed. The design results and simulation results are presented. As we can see, the simulation results agree well with the design results. The new design method has distinct advantages such as clear principle, simple design procedure and excellent design results.