波导宽边中心斜缝的散射特性

本文讨论矩形波导宽边中心线上倾斜窄缝隙向自由空间辐射问题,根据缝隙口面切向场的连续条件,计入波导壁的厚度,建立了较严格的积分方程,应用矩量法借助计算机进行数值求解,可获得缝隙口面场分布、散射场以及等效的散射参量和阻抗的普遍表达式。给出了X波段等效散射参量、等效阻抗随频率的变化规律,以及谐振电阻和谐振长度随倾角、波导壁厚度和频率的变化规律。理论计算结果与已有的实验数值吻合良好。

THE SCATTERING PROPERTIES OF AN INCLINED SLOT ON THE CENTER LINE OF THE BROAD FACE OF A WAUEGU1DE

The properties of an inclined slot, rediating in free space, on the center line of the broad face of a waveguide are discussed. The integral equations are dirived from continuity conditions of the tangetial fields, taking into account the waveguide wall thickness. A moment method is used to slove these equations numerically by means of a computer, thereby obtaining fields at the slot surfaces, the scattering fields and the general formulas of the scattering parameters as well as the equivalent impedances. The parameters of scattering and equivalent impedances at different frequencies are calculated in the X-band, the resonant resistances and the resonant lengths as a function of the inclination angle, the well thickness and the frequency are given also. The calculated results are in good agreement with those obtained experimentally.