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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。
In order to realize the miniaturization of the microwave photonic crystal structure, three kinds of EBG structures with different structures are proposed according to the equivalent circuit analysis model. The reflection curves of the three different EBG structures are obtained by simulation, Single-layer EBG structure simulation and comparison, and then analyzed the characteristics of a variety of double-layer EBG electromagnetic reflection characteristics. Simulation results show that all three kinds of EBG structures have zero phase reflections, but their reflection frequencies are not the same. Compared with the EBG structure with single-layer parametric parameters, the zero-phase frequency of the two-layer EBG with metal-loading ground plane shifts to high frequency, while the zero-phase frequency corresponding to the double-layer EBG structure without ground plane structure To move in the low frequency direction, this phenomenon has provided the basis for miniaturizing EBG unit structure.