米波雷达应对多路径效应的系统设计

随着国内外隐身飞行器装备的迅速发展，米波雷达再次成为雷达领域研究的热点之一。米波雷达具备阵元少、隐身目标反射面积大、可靠性高、成本低等优势，但基于米波频段较低的特点，俯仰维度波束宽度较宽，易受多路径影响，从而对米波覆盖空域、测高精度等性能产生了影响。结合当前数字阵列雷达技术发展，从米波雷达系统设计的角度，针对提高米波测高精度、空域覆盖连续性的设计方法进行分析，同时针对将多输入多输出等新技术融入到米波雷达设计中来应对多路径问题的可行性进行分析。

VHF Radar Designing Analysis Dealing with Multipath Effect

With the rapid development of domestic and foreign aircraft equipment, VHF radar is becoming the research spot in radar field. VHF radar has the advantage of less array elements, larger stealth target refection area, and lower cost. However, based on the characteristics of its low frequency band, the elevation beam width is wide and it is susceptible to multi-path influence, which has impacts the continuous coverage of the airspace and the high precision. From the perspective of the radar system design, the new MIMO technique is integrated into the design of VHF radar, so as to improve the height measurement, airspace coverage, and other properties in the multi-path environment.