人防工程口部雷达回波特性及伪装方法研究

为有效应对现代雷达对人防目标的侦察威胁，提高伪装防护能力，以人防工程口部为研究对象，综合运用模拟仿真与缩比模型实测的方法对口部目标雷达回波特性对比分析.通过获取来自不同威胁方向及不同施工状态下目标的回波热图，结合目标发现概率，研究明确了在回波对比度与方向性两方面存在暴露征候.在此基础上提出伪装思路，即采用随机起伏仿形薄壳与吸波涂层相结合的工程应用方法.经测试验证，该方法在改善回波特性上效果明显，在降低回波对比度的同时也使得各方向回波更为均匀，对雷达波多角度入射威胁起到良好伪装效果，为伪装设计提供了有力技术支撑.

Radar echo characteristic and camouflage method of civil defense cave

In order to effectively deal with the reconnaissance threat of modern radar to air defense targets and improve the ability of camouflage protection, this paper takes the civil air defense engineering cave as the research object, and uses the methods of simulation and scaling model measurement to compare and analyze the characteristics of radar echo. By acquiring the echo thermal maps of targets in different threat directions and construction conditions, combining with the detection probability, the exposure symptoms in echo contrast and orientation are confirmed. On this basis, an engineering application method combining random undulating profiled thin shells with absorbing coatings is proposed. The test results show that the method is effective in improving the echo characteristics, and it is manifested in reducing echo contrast and makes the echoes in all directions more uniform at the same time. Meanwhile, it is effective to counter the threaten of radar wave from multi-angle incidence, thus it can provid technical support for camouflage design.