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RCS of a ParallelPlate Waveguide Cavity with ThreeLayer Material Loading
Shoichi KOSHIKAWA Takeshi MOMOSE Kazuya KOBAYASHI
Publication
IEICE TRANSACTIONS on Electronics
Vol.E77C
No.9
pp.15141521 Publication Date: 1994/09/25 Online ISSN:
DOI: Print ISSN: 09168516 Type of Manuscript: PAPER Category: Electromagnetic Theory Keyword: WienerHopf technique, scattering and diffraction, radar cross section, waveguide cavities,
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Summary:
A rigorous radar cross section (RCS) analysis of a twodimensional parallelplate waveguide cavity with threelayer material loading is carried out for the E and Hpolarized planc wave incidence using the WienerHopf technique. Introducing the Fourier transform for the scattered field and applying boundary conditions in the transform domain, the problem is formulated in terms of the simultaneous WienerHopf equations satisfied by the unknown spectral functions. The WienerHopf equations are solved via the factorization and decomposition procedure together with rigorous asymptotics, leading to the efficient approximate solution. The scattered field in the real space is evaluated by taking the inverse Fourier transform and applying the saddle point method. Representative numerical examples on the RCS are given for various physical parameters. It is shown that the threelayer lossy material loading inside the cavity results in significant RCS reduction over broad frequency range.


