微波光子晶体的相位特性研究

Research on Phase Characteristics of Microwave Photonic Crystals

摘要:

为了实现微波光子晶体结构的小型化,根据其等效电路分析模型, 提出了三种不同结构的双层电磁带隙(EBG)结构, 通过仿真得到三种不同结构EBG的反射曲线, 并与传统的单层EBG结构进行仿真和比较, 进而分析了各种双层EBG的电磁反射特性的特点。仿真结果表明: 三种EBG结构均存在零位相反射, 但其反射频率不相同。与单层同参数的EBG结构相比, 两种加载金属地平面的双层EBG结构的零位相频率点向高频移动, 而未加载地平面结构的双层EBG结构所对应的零位相频率则向低频方向移动, 该现象为小型化EBG单元结构提供了依据。

Abstract:

In order to achieve the miniaturization of microwave photonic crystal structure, proposed are three different structures of double-layer EBG based on the equivalent circuit model of the traditional EBG structure. And the reflection curves of the three EBG were obtained by simulations with the software HFSS. And by comparisions with the traditional monolayer EBG structure, the reflection characteristics of the three different double-layer EBGs were analyzed. The simulation results show that the three kinds of EBG structure all present zero-phase reflection, but their reflection frequency is quite different. Compared with the single-layer EBG structure with the same parameters, the zero-phase frequency point of two kinds of double-layer EBG structure loading metal ground plane moves to the higher frequency, but the zero-phase frequency point without load ground plane moves to the direction of low frequency. This phenomenon provides the basis for miniaturization of EBG structure unit.