报告人：Prof. Kazuya Kobayashi Chuo University, Japan
时间: 2016/3/18, 14:30-15:30 pm
地点: 物理机电航空大楼438会议室
摘要: The analysis of electromagnetic scattering from open-ended metallic waveguide cavities has received much attention 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 occurring on surfaces of general complicated bodies. There have been a number of investigations on the scattering by cavities of various shapes based on high-frequency techniques and numerical methods. It appears, however, that the solutions obtained by these methods are not uniformly valid for arbitrary cavity dimensions. The Wiener-Hopf technique is one of the powerful, rigorous approaches for solving diffraction problems associated with canonical geometries. In this lecture, we shall consider two canonical, two-dimensional parallel-plate waveguide cavities with material loading, and carry out a comparative RCS study of these cavities using the Wiener-Hopf technique. The scattered field in the real space is evaluated by taking the inverse Fourier transform and applying the saddle point method. Representative numerical examples of the RCS are shown for various physical parameters, and the far field scattering characteristics of the two cavities are discussed in detail. The results presented here are valid over a broad frequency range and can be used as a reference solution for validating other analysis methods such as high-frequency techniques and numerical methods.
报告人简介: Kazuya Kobayashi received his B.S., M.S., and Ph.D. degrees, all in electrical engineering, from Waseda University, Tokyo, Japan in 1977, 1979, and 1982, respectively. In 1982, he joined the Department of Electrical, Electronic, and Communication Engineering, Chuo University, Tokyo, Japan, where he has been a Professor since 1995. He held central management positions at Chuo University, including Vice-President (2006-2008), Director of the International Center (2003-2006), and Secretary to President (2001-2003). His research area includes, developments of rigorous mathematical techniques as applied to electromagnetic wave problems, integral equations, boundary value problems, special functions, radar cross section, and scattering and diffraction.
