桅杆雷达承载平台隐身性能分析

摘要

At present, lots of exposed radar′s loaded platform exists in the design of ship mast. The platform formed prominence on the surface of mast, and may produce strong multiply reflection. In this paper, based on the fast multipolemethod and physical optics, analyzedelectromagnetic scattering mechanism of a mast′s radar loaded platform, and studied the influence of radar parameters and shape parameters on the RCS of radar′sloaded platform. The result showed the multiply reflection was the primarily reflecting source of general RCS, and single reflection was the primarily reflecting source of peak RCS. And the smaller wavelength of radar, the higher of general RCS. The polarizations of electromagnetic wave have little influence on RCS. The inclination of the side on platform has greater impact on the stealth performance of radar′s loaded platform, the face angle has little influence, and the increase of underside inclination will reduced the stealth performance of the platform.%目前，在舰船桅杆设计中存在大量外露的雷达承载平台，在桅杆表面形成突出物，可能产生较强的多重反射。本文基于快速多极子法(FMM)和物理光学法(PO)2种电磁散射计算方法，以某桅杆的雷达承载平台为研究对象，对其电磁散射方式进行分析，研究雷达波参数和外形参数对雷达承载平台RCS的影响。结果表明多重反射是其总体RCS的主要反射源，单次反射是RCS峰值的主要来源。雷达波波长越小，总RCS就越大，极化方向对该模型的电磁反射的影响较小。平台侧面的倾角对雷达承载平台的隐身性能影响较大，端面倾角对隐身性能的影响较为有限，底面倾角的增大会降低平台的隐身性。