開放円筒導体曲面のエッジによる過渡表面回折波の近似解析

摘要

In this study, we present the asymptotic analysis method for the transient surface diffracted ray (SD ray) excited by the edge of a cylindrically curved convex conducting open surface. We assume a truncated high-frequency Gaussian-type modulated pulse source. The validity of the time-domain asymptotic solution proposed in this study is confirmed by comparing with the reference solution calculated numerically. The physical phenomena such as the group velocity, the phase velocity, the magnitude shape, and the instantaneous angular frequency of the transient SD ray are discussed.%近年，レーダ散乱断面積，高分解能レーダ，および形状認識に関する技術の進展により，エッジあるいは模を有する滑らかな完全導体曲面による周波数領域および時間領域における散乱電磁界に対する高周波近似解析が重要な研究課題となっている.