Title :
Scattering from narrow rectangular filled grooves
Author :
Barkeshli, Kasra ; Volakis, John L.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA
fDate :
6/1/1991 12:00:00 AM
Abstract :
The solution of the integral equation for a small width rectangular groove is considered. It is shown that by retaining the dominant mode supported by the rectangular groove, the resulting quasi-static integral equations are comparable to those associated with the perfectly conducting narrow strip. They are, therefore, amenable to analytic solution yielding the exact field distribution or equivalent currents across the groove´s aperture. The derived currents exhibit the same edge behavior as that associated with the currents of a perfectly conducting half-plane. The corresponding current behavior based on a (numerical) impedance simulation of the groove is quite different. However the resulting echowidths are comparable. Both transverse electric (TE) and transverse magnetic (TM) polarizations are treated
Keywords :
electromagnetic wave scattering; integral equations; TE; TM; analytic solution; dominant mode; edge behavior; electromagnetic scattering; equivalent currents; field distribution; groove aperture; groove echowidth; impedance simulation; narrow rectangular filled grooves; perfectly conducting half-plane; perfectly conducting narrow strip; quasi-static integral equations; transverse electric polarisation; transverse magnetic polarisation; Apertures; Current distribution; Helium; Impedance; Integral equations; Magnetic analysis; Magnetic materials; Polarization; Scattering; Tellurium;
Journal_Title :
Antennas and Propagation, IEEE Transactions on