对机载雷达罩提出一种分段变厚度的设计思想,实现变厚度机载雷达罩的建模。分别采用低频的多层快速多极子方法(MLFMM)、高频的物理光学法(PO)及高低频相结合的物理光学混合矩量法(PO/MoM),利用这三种方法对一个中等尺寸机载雷达天线罩在分段变厚度情况下进行远场辐射方向图的计算,通过对三者所得结果的比较得出:PO/MoM混合方法在电大尺寸雷达罩电磁性能仿真计算中所具有的优越性及机载雷达罩分段变厚度方法的可操作性。
Firstly,a method of piecewise variable wall thickness of airborne radome is proposed to realize its modeling.Secondly,by using three algorithm,namely,Multilevel Fast Multipole Method(MLFMM) of low frequency,Physical Optical of high frequency and Physical Optics the Method of Moments(PO/MoM) respectively,we calculate the far field of a medium-size airborne radome with piecewise variable thickness.After comparing the results,we find that the PO/MoM method have the superiority in electrical large radome′s electromagnetic simulation because its better accuracy and less memory consuming than the other two methods,it also proved the feasibility of the design thought of piecewise variable thickness for airborne radome.