电磁带隙微波抗流器的设计与可行性分析

Design of Electromagnetic Band Gap Structures Used in Microwave Choking Systems

在对新型结构材料一电磁带隙结构(EBG)研究的基础上。结合微波抗流器的特点和要求,提出两种新型的微波抗流结构。用有限元方法进行了仿真,并研究了介质损耗对EBG结构微波抗流器抗流效果的影响,微波辐射能量流经抗流器后的功率衰减情况以及该结构应用的可行性。对其中一种结构进行了缩尺实验,证明了仿真的有效性。提出的抗流器结构与传统的皱褶抗流器相比,具有更大的开口尺寸,禁带可更宽,衰减更大。

Based on the research of a new type of structure, Electromagnetic Band Gap (EBG), and the features and requirements of the microwave choking systems, two novel types of microwave choking systems are proposed. The EBG choking systems are evaluated by finite element analysis. The influence of dielectric loss on the choking performance of the EBG system and the power loss are also studied, as well as possible applications of the EBG choking systems. A reduced scale experiment is done on one of the EBG structures to verify the analysis, and the results show that the new choking systems perform better, within the specifications for aperture size, operational band and choking ability, when compare with the traditional microwave choking systems.