TY - JOUR
T1 - Analysis and Numerical Solution of Transient Electromagnetic Scattering from Overfilled Cavities
AU - J. Huang & A. Wood
JO - Communications in Computational Physics
VL - 6
SP - 1043
EP - 1055
PY - 2006
DA - 2006/01
SN - 1
DO - http://doi.org/
UR - https://global-sci.org/intro/article_detail/cicp/7993.html
KW - Time domain
KW - overfilled cavity
KW - scattering
KW - Fourier transform
KW - finite element method.
AB - <p style="text-align: justify;">A hybrid finite element (FEM) and Fourier transform method is implemented to analyze the time domain scattering of a plane wave incident on a 2-D overfilled cavity embedded in the infinite ground plane. The algorithm first removes the
time variable by Fourier transform, through which a frequency domain problem is obtained. An artificial boundary condition is then introduced on a hemisphere enclosing
the cavity that couples the fields from the infinite exterior domain to those inside. The
exterior problem is solved analytically via Fourier series solutions, while the interior
region is solved using finite element method. In the end, the image functions in frequency domain are numerically inverted into the time domain. The perfect link over
the artificial boundary between the FEM approximation in the interior and analytical
solution in the exterior indicates the reliability of the method. A convergence analysis
is also performed.</p>