Title :
Application of finite-integral technique to electromagnetic scattering by two-dimensional cavity-backed aperture in a ground plane
Author :
Rao, Sadasiva M. ; Gothard, Griffin K. ; Wilton, Donald R.
Author_Institution :
Dept. of Electr. Eng., Auburn Univ., AL, USA
fDate :
5/1/1998 12:00:00 AM
Abstract :
We analyze the electromagnetic scattering by a cavity-backed two-dimensional (2-D) aperture in a ground plane illuminated by either a TE or TM plane wave. The analysis is based on the well-known generalized network formulation. To obtain the admittance matrix of the cavity, the cavity is modeled by triangular cylinders. Also, in order to specify inhomogeneous materials, a separate ε and μ may be assigned to each cylinder. Further, the cavity is analyzed by applying the finite-integral technique (FIT), which results in a spurious-free solution. Finally, numerical examples are presented to illustrate the applicability of the method
Keywords :
Maxwell equations; circular waveguides; electric admittance; electromagnetic wave scattering; integral equations; matrix algebra; permeability; permittivity; rectangular waveguides; waveguide theory; 2D cavity-backed aperture; Maxwell´s equation; TE plane wave; TM plane wave; admittance matrix; circular waveguides; cylinder; electromagnetic scattering; finite-integral technique; generalized network formulation; ground plane; inhomogeneous materials; integral equations; permeability; permittivity; rectangular waveguides; sparse matrix; spurious-free solution; triangular cylinders; Apertures; Electromagnetic fields; Electromagnetic scattering; Integral equations; Iron; Magnetic fields; Magnetic materials; Nonuniform electric fields; Tellurium; Two dimensional displays;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
