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建立了两种通用直升机几何外形模型,采用物理光学法和等效电磁流法进行雷达散射特性计算分析。结果表明,两种通用直升机雷达散射水平较高,头向/尾向及侧向RCS分别达到数十和数百平方米;大曲率半径曲面机身比倾斜平面式机身散射强;可收放式起落架可以改善雷达隐身性能。本文结果对开展通用直升机雷达隐身设计研究具有重要的参考价值。
Two general helicopter geometric shape models were established, and the physical scattering and equivalent electromagnetic flow method were used to calculate and analyze the radar scattering characteristics. The results show that the two common helicopters have a high level of radar scattering, and the head / tail and side RCS reach dozens and hundreds of square meters respectively. The large radius curvature surface body scatters more than the inclined plane type fuselage; Landing gear can improve the radar stealth performance. The results of this paper have important reference value for the research on stealth design of general helicopter radar.