基于FDTD算法的周期结构分析  

FDTD Algorithm-based Analysis of Periodic Structure

作　　者：许林青 赵建平[1] 张仕顺 杨君[1] 徐娟[1] XU Lin-qing;ZHAO Jian-ping;ZHANG Shi-shun;YANG Jun;XU Juan(College of Physics and Engineering, Qufu Normal University, Qufu Shandong 273165, China)

机构地区：[1]曲阜师范大学,山东曲阜273165

出　　处：《通信技术》2019年第4期828-832,共5页Communications Technology

基　　金：山东省博士基金项目(No.ZR2017BF017);国家青年科学基金项目(No.61701278);毫米波国家重点实验室开放课题(No.K201929)~~

摘　　要：周期结构具有特殊的物理性质,日益受到人们的青睐,被广泛应用到科学研究和实际应用中。时域有限差分方法属于一种直接的时域计算方法,具有适用性强、节省存储空间和计算空间、天然的并行特性、程序通用性强等优势,在分析周期结构领域中有着广泛应用。采用FDTD算法结合周期结构的理论,分析了一种基于方形单开口环的频率选择表面模型,尺寸为7 mm×7 mm×0.25 mm,中心频率为11 GHz。用商用软件CST(三维电磁场仿真软件)仿真周期结构的模型,通过两者得到的反射系数结果对比,验证了算法的正确性,为后续利用此算法分析更复杂的结构奠定了基础。The periodic structure has special physical properties, more and more people are interested in it, and is widely used in scientific research and practical applications. FDTD (Finite-Difference Time-Domain), as a direct time domain calculation method with strong applicability, storage-space and computing space saving, natural parallel characteristics, strong program versatility and other advantages, has a wide range of applications in the field of analytical cycle structures. By using the FDTD algorithm in combination with the theory of periodic structure, a frequency selective surface model based on a square single-opening loop is analyzed, with a size of 7 mm × 7 mm × 0.25 mm and a center frequency of 11 GHz. Commercial software CST (three-dimensional electromagnetic field simulation software) is used to simulate the model of the periodic structure. The correctness of the algorithm is verified by comparing the reflection coefficient results obtained by the two, thus laying a foundation for the subsequent analysis of more complex structures.

关 键 词：时域有限差分方法 周期结构 频率选择表面 周期边界条件 

分 类 号：TN92[电子电信—通信与信息系统]