Scattering from narrow rectangular filled grooves

• Published in: IEEE transactions on antennas and propagation Vol. 39; no. 6; pp. 804 - 810
• Main Authors: Barkeshli, K., Volakis, J.L.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.06.1991; Institute of Electrical and Electronics Engineers
• Subjects: Apertures; Applied sciences; Current distribution; Diffraction, scattering, reflection; Exact sciences and technology; Helium; Impedance; Integral equations; Magnetic analysis; Magnetic materials; Polarization; Radiocommunications; Radiowave propagation; Scattering; Telecommunications; Telecommunications and information theory; Tellurium; Mathematical formula; Approximation; Wave scattering; Groove; Current distribution; Integral equation; Rectangular shape; Electromagnetic wave
• ISSN: 0018-926X; 1558-2221
• DOI: 10.1109/8.86879

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.< >