Technical Journal, Vol. 10 No. 3-4, 2016.
Original scientific paper
An approximate solution for the plane wave diffraction by an impedance strip: h-polarization case
Emine Avşar Aydin
orcid.org/0000-0002-5068-2957
; Adana Science and Technology University, Department of Aeronautics Engineering, Seyhan/Adana, Turkey
Turgut İkiz
; Çukurova University, Department of Electrical-Electronic Engineering, Adana, Turkey
Abstract
In this study, the diffraction of H-polarized plane wave by an infinitely long strip which has the same impedance on both faces with a width of 2a is investigated by using an analytical-numerical method. The diffracted field is obtained by an integral equation in terms of the electric and magnetic currents induced by the incident field. This integral equation is reduced to two uncoupled integral equations that include only induced electric and magnetic currents separately. Both of the currents are defined as a sum of infinite series of Gegenbauer polynomials with unknown coefficients satisfying the edge conditions. The integral equations are transformed to linear algebraic equations by using analytical methods and the unknown coefficients are determined by solving numerically obtained matrix equations. Numerical examples on the RCS (radar cross section) are presented, and the far field scattering characteristics of the strip are discussed in detail. Some of the obtained results are compared with the other existing method.
Keywords
impedance; strip; analytic; numeric; diffraction
Hrčak ID:
171827
URI
Publication date:
15.12.2016.
Visits: 1.991 *