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本文分析了任意入射波情况下无限大平面金属条栅的波透射特性。文章将任意入射波分解为:(1) 磁场矢量垂直于栅轴(电场矢量在入射方向和栅轴所构成的平面内),我们称之为E_Ⅱ分量。(2) 电场矢量垂直于栅轴,我们称之为E_(?)分量。文中着重讨论了E_Ⅱ分量的情况。首先,利用Poisson求和公式和矩量法并结合近似技术,对栅的透射特性进行了数值分析(文中称之为严格分析),继而对栅条较窄的情况,取一电流近似分布形式,导出了透射系数的解析表示式(文中称之为近似分析),经比较,两种结果十分吻合。
In this paper, the wave transmission characteristics of an infinite planar metal grid with arbitrary incident waves are analyzed. The article decomposes any incident wave into: (1) The magnetic field vector is perpendicular to the grid axis (the electric field vector is in the plane of incidence and the grid axis), which we call the E_II component. (2) The electric field vector perpendicular to the grid axis, we call it E_ (?) Component. This article focuses on the E_II component of the situation. Firstly, the numerical analysis (referred to as rigorous analysis) of the transmission characteristics of the grid is performed by using the Poisson summation formula, the moment method, and the approximation technique. Then, for the case of narrower grids, a current approximate distribution is taken, The analytic expression of transmission coefficient (referred to as approximate analysis in this paper) is derived. By comparison, the two results are in good agreement.