不完全エッジによるスカラー平面波の散乱

摘要

The scattering of a scalar plane wave from a half plane with an imperfect edge changing slightly from a straight line is treated based on the physical optics approximation. For Dirichlet and Neumann boundary conditions the far scattered fields are derived. The scattering pattern for a finite periodic edge has peaks at certain specific scattering angles depending on only the edge period. The average power of the far scattered wave for a random edge is expressed as the power spectrum of the edge shape.%エッジ形状が直線から僅かに変化する半無限平面によるスカラー平面彼の散乱問題を物理光学近似に基づいて取り扱った.デイリクレおよびノイマン境界条件を仮定し，遠方散乱界を導出した.エッジ形状が周期的に変化する場合，散乱パターンがエッジ周期で決まるある特定の散乱角でピークを持つことを明らかにした.