机载预警雷达电磁波传播多径效应研究  

Study on the Multipath Effect of the Radio Wave Propagation About the Early Warning Radar

作　　者：刘波 郑帆 刘宝泉[3] LIU Bo;ZHENG Fan;LIU Baoquan(Science and Technology on Complex Aviation Systems Simulation Laboratory, Beijing 100076, China;Nanjing Corad Electronic Equipment Co, Ltd, Nanjing 211100, China;The 38th Research Institute of China Electronics Technology Group Corporation, Hefei 230088, China)

机构地区：[1]复杂航空系统仿真重点实验室,北京100076 [2]南京科瑞达电子装备有限责任公司,江苏南京211100 [3]中国电子科技集团公司第三十八研究所,安徽合肥230088

出　　处：《雷达科学与技术》2022年第3期272-280,共9页Radar Science and Technology

摘　　要：机载预警雷达覆盖方位广、平台远离地面,和地面雷达相比,电磁波传输多径效应与地面雷达地面相比更为严重,空域覆盖特别是低空与自由空间差异大。本文依据电波传播的基本理论,研究了不同极化、不同高度、不同发射频率和不同地表类型时多径效应对机载预警雷达空域覆盖的影响,并基于电磁波反射、传输理论阐明了仿真结果中的变化规律,为机载预警雷达设计提供指导和依据。最后,给出了利用不同发射频率和不同极化,空域覆盖受多径效应影响的差异性,进行协同探测增强雷达探测性能的结论。Because of wide coverage in azimuth and high altitude from the ground,the multipath effect of airborne radar is usually more serious than ground radar.In this paper,the effects of multipath on airborne early warning radar airspace coverage under different polarizations,different altitudes,different radio frequencies and different earth surfaces are researched by the theory of the wave propagation.Based on the simulation results,the variation laws are obtained.Finally,the differences of the radar coverages under different radio frequencies and different polarizations are presented.The result of cooperative detection shows the improved performance of radar detection.

关 键 词：机载预警雷达 空域覆盖 多径效应 协同探测 

分 类 号：TN957[电子电信—信号与信息处理] TN959.73[电子电信—信息与通信工程]