格栅封堵模型电磁散射特性研究

The Investigation of Electromagnetic Scattering Characteristics of Blocked Model with Metallic Grille

腔体散射是机上的强散射源,采用带金属格栅的封堵模型对腔体进行封堵,对腔休前部形成有效遮挡,减小雷达波进入腔体的机率,从而有效降低腔体的RCS。通过电磁仿真软件分析与研究不同封堵模型的格栅面形式、格栅面倾角等因素的隐身特性,探索格栅面形式、格栅面倾角等因素对电磁屏蔽性能的影响规律。并通过对单、双斜切格栅封堵模型试验件进行对比测试,测试结果说明双斜切格栅的RCS减缩效果优于单斜切格栅RCS缩减效果。

The cavity scattering is the strong scattering source of the aircraft.The cavity is blocked by the metallic grille in order to effectively shield the leading end of the cavity,reduce the radar wave into the cavity and the RCS of the cavity.Different grille shapes and inclined angles are analyzed and investigated with electromagnetic simulation software.In addition effect laws of electromagnetism shield are investigated.Grille models with single and double inclined grilles are electromagnetically measured in order to verify effects.The measurement result indicates that the RCS of double inclined grille model is lower than the single one.