Scattering from narrow rectangular filled grooves
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 quasistatic 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 halfplane. 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.
 Publication:

IEEE Transactions on Antennas and Propagation
 Pub Date:
 June 1991
 DOI:
 10.1109/8.86879
 Bibcode:
 1991ITAP...39..804B
 Keywords:

 Current Distribution;
 Electromagnetic Scattering;
 Grooves;
 Plane Waves;
 Polarization (Waves);
 Green'S Functions;
 Hankel Functions;
 Integral Equations;
 Communications and Radar