Title :
Efficient hybrid spatial and spectral techniques in analyzing planar periodic structures with nonuniform discretizations
Author :
Yu, Yongxue ; Chan, Chi Hou
Author_Institution :
Dept. of Electron. Eng., City Univ. of Hong Kong, Kowloon, China
fDate :
10/1/2000 12:00:00 AM
Abstract :
A new efficient technique for analyzing planar periodic structures with arbitrary unit cell geometry rendered in a nonuniform discretization is proposed in this paper. The mixed potential integral equation is solved by the method of moments in conjunction with the Rao-Wilton-Glisson triangular discretization. The convergence of computing each element in the impedance matrix is accelerated using Ewald´s method for contributions of quasi-dynamic and complex images and the lattice-sum method for the surface-wave contribution. Numerical efficiency and accuracy of this hybrid method are compared with the spectral-domain method
Keywords :
convergence of numerical methods; frequency selective surfaces; impedance matrix; integral equations; method of moments; periodic structures; planar waveguides; waveguide theory; Ewald´s method; Rao-Wilton-Glisson triangular discretization; arbitrary unit cell geometry; complex images; hybrid spatial/spectral techniques; impedance matrix; lattice-sum method; method of moments; mixed potential integral equation; nonuniform discretization; nonuniform discretizations; planar periodic structures; quasi-dynamic images; surface-wave contribution; Acceleration; Convergence; Geometry; Integral equations; Moment methods; Periodic structures; Rendering (computer graphics); Spectral analysis; Surface impedance; Transmission line matrix methods;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
