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Finite-element time-domain modelling of plane wave scattering by a periodic structure using an exact boundary condition

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2 Author(s)
Cai, Y. ; Commun. & Signal Process. Group, Univ. of Warwick ; Mias, C.

A two-dimensional singly-periodic structure, at plane wave oblique incidence, is modelled using the finite-element time-domain method. Over the non-periodic boundaries of the computational domain, an exact Floquet modal absorbing boundary condition is developed, in detail, for the finite element method in the time domain. The proposed formulation is validated by comparing its results with that of the finite-element frequency-domain method and with independently obtained published results. Very accurate numerical results, over a wide frequency range and incident angle range, are obtained for both transverse electric and transverse magnetic polarised plane wave illuminations

Published in:

Microwaves, Antennas & Propagation, IET  (Volume:1 ,  Issue: 3 )