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HighFrequency Diffraction by a Strip Located at the Interface between Two Different Media
Sevtap SAPMAZ Kazuya KOBAYASHI Alinur BUYUKAKSOY Gokhan UZGOREN
Publication
IEICE TRANSACTIONS on Electronics
Vol.E79C
No.5
pp.709719 Publication Date: 1996/05/25 Online ISSN:
DOI: Print ISSN: 09168516 Type of Manuscript: PAPER Category: Electromagnetic Theory Keyword: strip, WienerHopf technique, scattering and diffraction, radar cross section,
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Summary:
The Epolarized plane wave diffraction by a perfectly conducting strip located at the plane interface between two different media is analyzed by the WienerHopf technique. Applying the boundary conditions to the integral representations for the unknown scattered field, the problem is formulated in terms of the modified WienerHopf equation(MWHE), which is reduced to a pair of simultaneous integral equations via the factorization and decomposition procedure. The integral equations are solved asymptotically for large strip width via the method of successive approximations leading to the first, second and third order solutions, which are valid at high frequencies. The scattered far field expression is derived by taking the inverse Fourier transform and applying the saddle point method. It is shown that the highfrequency scattered far field comprises the geometrical optics field, the singly, doubly and triply diffracted fields and the lateral waves. Numerical examples of the radar cross section(RCS) and the lateral waves are presented, and the far field scattering characteristics discussed in detail.


