@article{oai:chuo-u.repo.nii.ac.jp:00001241,
 author = {Dozyslav B., Kuryliak and KOBAYASHI, Kazuya and KOSHIKAWA, Shoichi and Zinoviy T, Nazarchuk},
 journal = {中央大学理工学研究所論文集},
 month = {Mar},
 note = {application/pdf, 1.Introduction:
The analysis of the scatteringand diffraction by open-ended metallic waveguide cavities has been of great interest recently in connection with the prediction and reduction of the radar cross section (RCS) of a target. This problem serves as a simple model of duct structures such as jet engine intakes of aircrafts and cracks occurringon surfaces of general complicated bodies. Therefore the investigation of a scattering mechanism in case of the existence of open cavities is an important subject in the field of the RCS prediction and reduction. Some of the cavity diffraction problems have been analyzed thus far usinga variety of different analytical and numerical methods. If the cavity dimensions are small in comparison to the incident wavelength, numerical techniques such as the method of moments and the finite element method can be applied efficiently. For large cavities with uniform cross sections, the results based on the waveguide modal approach by the use of the reciprocity relationship and the Kirchhoff approximation have been reported. In order to describe systematically the scattering mechanism as related to a fairly general class of large cavities with reasonable accuracy, the three ray-based approaches, namely, the method of shootingand bouncing rays, the Gaussian beam method, and the generalized ray expansion method have been developed. Furthermore, hybrid techniques such as the asymptotic/modal approach and the boundary integral/modal approach have also been established. These hybrid approaches take advantage of the efficiency of the modal analysis as well as the flexibility of asymptotic or numerical techniques. Most of these analysis methods incorporate the scatteringfrom the interior of the cavity includingthe rim diffraction at the open end, but they do not rigorously take into account the scattering effect arising from the entire exterior surface of the cavity. Therefore, final solutions due to these approaches are valid only for the restricted range of incidence and observation angles. In addition, these solutions may not be uniformly valid for arbitrary dimensions of the cavity., 【査読有】},
 pages = {45--51},
 title = {Wiener-Hopf Analysis of the Diffraction by a Circular Waveguide Cavity},
 volume = {10},
 year = {2005}
}