E/H面不连续腔体的雷达散射截面分析

应用散射参数的级联特性分析不规则腔体的雷达散射截面。针对进气道前端的不规则矩形管道结构，采用全波模式法精确分析了E／H面任意不连续矩形腔体散射参数的求取，再根据等效网络的级联特性求得任意组合不规则矩形管道的散射矩阵，在保持计算精度的条件下克服了模式法只能精确计算规则腔体结构的限制。数值结果验证了该方法的正确性。

RCS Analysis of Cavities with E/H Plane Discontinuities

The radar cross section(RCS) of irregular cavities is studied by cascading the scattering parameter of two-ports cavity. Aiming at the irregular rectangular tube of the inlet of jet engine, full-wave modal method was applied to compute scattering parameters of the rectangular cavities with arbitrary E/H plane discontinuities accurately. Based on the cascading character of two ports, the scattering of the tube can be analyzed through separating the cavity into sections reasonably. High accuracy can be achieved by this approach. Meanwhile, the limitation of modal method to uniform cavity is overcome. Numerical results have been given to verify the present approach.