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Shadowing a Small Size but Large Radar Cross Section Object with a Large Size but Small Radar Cross Section Object

机译:阴影小尺寸但大雷达横截面对象,具有大尺寸但小雷达横截面对象

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Radar cross section (RCS) is not necessarily in direct proportion to object size, particular structure shape that can cause multiple reflection usually has larger RCS. In this article we demonstrate how a small object with a large RCS, like the corner reflector, can be shadowed by a large object with a small bistatic RCS for certain direction, like a fighter engine air inlet, to achieve RF stealth effect in certain direction. Multi-level-fast-multipole-method (MLFMM) simulations are used to calculate the RCS of these two structures in S-band, and compare their RCS when the corner reflector is placed inside the air inlet. Results show RCS reduction up to 17 dBs is possible, but the combined RCS is not as small as the air inlet itself because reflection from the corner reflector can still find its way out to the radar.
机译:雷达横截面(RCS)不一定与对象尺寸的直接比例,特定的结构形状可以导致多个反射通常具有较大的RC。在本文中,我们展示了具有大型RCS的小型物体,如拐角反射器,可以由一个大型对象遮蔽,具有小的双柱RCS,用于某些方向,如战斗机空气入口,以实现某些方向的RF隐形效应。多级快 - 多极 - 方法(MLFMM)模拟用于计算S波段中这两个结构的RC,并且当拐角反射器放置在空气入口内时,它们的RCS比较。结果显示RCS可降低高达17个DBS,但组合的RCS并不像空气入口本身一样小,因为来自角落反射器的反射仍然可以找到雷达的方式。

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