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A Time-Domain Finite Element Method for Helmholtz Equations

✍ Scribed by Tri Van; Aihua Wood

Publisher
Elsevier Science
Year
2002
Tongue
English
Weight
245 KB
Volume
183
Category
Article
ISSN
0021-9991

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✦ Synopsis

A time-domain finite element method is developed to approximate the electromagnetic fields scattered by a bounded, inhomogeneous two-dimensional cavity embedded in the infinite ground plane. The time-dependent scattering problem is first discretized in time by Newmark's time-stepping scheme. A nonlocal boundary condition on the cavity aperture is constructed to reduce the computational domain to the cavity itself. The variational problems using finite element methods are shown to have unique solutions. Numerical experiments for both TE and TM polarizations demonstrate the accuracy and stability of the method.

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