频域有限差分法在二维周期导波结构中的应用  

The Application of the Finite Difference Frequency Domain Method in Two Dimension Periodic Guided Waves Structures

作　　者：许锋[1] 洪伟[1] 周后型[1] 

机构地区：[1]东南大学国家毫米波重点实验室,江苏南京210096

出　　处：《应用科学学报》2003年第2期205-208,共4页Journal of Applied Sciences

摘　　要：提出了一种计算二维周期导波结构的频域有限差分(FDFD)法。在电场边界和磁场边界上同时使用Flo-quet定理,从而将计算域限制在一个周期结构内,并且导波结构侧面可引入吸收边界条件,保证了计算精度.通过计算矩阵的本征值获得传播常数,而无需求解关于传播常数的高阶超越方程,极大地提高了计算速度。A novel finite-difference freqency-domain method is presented for the analysis of electromagnetic wave propagation in periodic structures. The boundary conditions are set according to Floquet's theorem for periodic structures. Floquet's theorem is used both on the electric field boundary and the magnetic field boundary. Thus, the computational domain is restricted to a single period, and the absorbing boundary conditions can be used on the other boundaries. The propagation constant can be obtained by means of calculating matrix eigenvalues, and there is no need to solve the high-order equation. In this way, the calculation time is greatly saved.

关 键 词：频域有限差分法 FLOQUET定理 周期导波结构 矩阵本征值 传播常数 传播特性 

分 类 号：TN011[电子电信—物理电子学]