金属电磁带隙波导色散特性分析  

Analysis of dispersion properties in metal electromagnetic band gap waveguide

作　　者：柏宁丰[1] 孙小菡[1] 冯进军 邬显平 廖复疆 

机构地区：[1]东南大学电子器件系统可靠性研究中心,南京210096 [2]大功率微波电真空器件技术国家重点实验室,北京100016

出　　处：《东南大学学报（自然科学版）》2007年第5期761-765,共5页Journal of Southeast University：Natural Science Edition

基　　金：大功率微波电真空器件技术国家重点实验室资助项目

摘　　要：建立了紧凑格式二维时域有限差分法（CFDTD）模型，利用二维网格划分计算三维传播问题，简化了计算量．提出了一种纵向均匀的中心缺陷型六角晶格金属电磁带隙波导结构．利用CFDTD仿真该金属电磁带隙波导，获得该结构的基模场分布及频率．改变纵向传播常数，得到对应的基模频率以及色散特性，计算结果表明色散特性满足电磁带隙的缩放特性．测量该波导在11～15GHz以内的传输率，12GHz附近的波导波长和色散曲线，仿真结果与测量值误差在5％以内．The compact finite-difference time-domain （CFDTD） method was employed to simulate the dispersion properties in an electromagnetic band gap （EBG） waveguide which was uniform in the propagation direction. This EBG waveguide has hexagonal lattice in the transverse section with center rod removed. CFDTD was employed to simulate field distribution and corresponding frequency of fundamental mode. Dispersion properties of fundamental mode in this metal EBG waveguide were obtained by varying propagation constant of guided mode. Simulation results show that dispersion property in this EBG waveguide follows scaling law. Transmissitivity of this EBG waveguide was measured between 11 to 15 GHz. Based on the measured traveling wavelengths around 12 GHz, the dispersion properties in this EBG waveguide were described. It is found that the differences between simulation results and measured values are within 5 %.

关 键 词：电磁带隙 时域有限差分法 色散 

分 类 号：TN011[电子电信—物理电子学]