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

Volume

48

Issue

10

fYear

2000

fDate

10/1/2000 12:00:00 AM

Firstpage

1623

Lastpage

1627

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;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.873888

Filename

873888