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High-order finite-element analysis of electromagnetic scattering from periodic structures

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2 Author(s)
Zheng Lou ; Dept. of Electr. & Comput. Eng., Illinois Univ., Urbana, IL, USA ; Lian-Ming Jin

This paper presents a high-order vector finite element analysis of periodic structures. In the modeling, the computational domain is confined to a unit cell by enforcing appropriate boundary conditions. The region inside the unit cell is discretized with high-order curvilinear tetrahedral elements to obtain the best geometric modeling. Since the FEM typically produces a large number of unknowns, high-order elements are used to reduce computation time and memory for a given accuracy. Furthermore, an asymptotic waveform evaluation (AWE)-based technique is used to perform fast frequency and angle sweeps. Numerical examples, including periodic absorbers and FSS structures, are presented to demonstrate the accuracy and versatility of the method.

Published in:

Antennas and Propagation Society International Symposium, 2003. IEEE  (Volume:2 )

Date of Conference:

22-27 June 2003