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Efficient hybrid spatial and spectral techniques in analyzing planar periodic structures with nonuniform discretizations

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2 Author(s)
Yongxue Yu ; Dept. of Electron. Eng., City Univ. of Hong Kong, Kowloon, China ; Chi Hou Chan

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

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IEEE Transactions on Microwave Theory and Techniques  (Volume:48 ,  Issue: 10 )