针对现役精密进场雷达数据率低、测量精度差和维护成本高等问题,提出了一种基于数字超表面相控阵天线,从而取代精密进场雷达机械扫描天线,提升雷达的整体性能。该天线通过嵌入式控制电路加载PIN二极管,实现对超材料表面单元反射相位的动态调控,最终实现数字超表面相控阵天线。与传统相控阵天线相比具有成本低、体积小、重量轻、效能高等特点。通过测试表明,该天线能够满足精密进场相控阵雷达天线的指标要求,并具有测量精度高,扫描速度快,探测方式灵活等优势,为设计新型精密近场天线提供一条新思路。

Due to the low data rate,poor accuracy of measurement and high maintenance cost of precision approach radar, a new phased-array antenna based on metasurface is proposed to replace traditional mechanical scanning antenna in order to improve the ability of radar. This new phased array radar antenna, which has PIN diode, combined with embedded control circuit, to achieve dynamic control of reflection phase of the unit cell and a new phased array radar antenna based on metasurface finally. Compared with the traditional phased array radar antenna, the new one has a great advantage of low price, small size, lightweight, and high efficiency. The test shows that the new phased array radar antenna not only can meet the precision approach radar antenna′s requirements but also with the advantage of high measurement precision, fast scanning speed, flexible detection method. It starts the train of thought for designing new radar antenna.

TN82

国家自然科学基金资助项目(61973314、61801508)