有源器件混合集成的超薄超宽带可调雷达吸波体  

Ultra-thin ultra-wideband tunable radar absorber based on hybrid incorporation of active devices

作　　者：冯奎胜 李娜[1,2] 李桐 Feng Kui-Sheng;Li Na;Li Tong(College of Artificial Intelligence,Yango University,Fuzhou 350015,China;Information and Navigation College,Air Force Engineering University,Xi’an 710077,China)

机构地区：[1]阳光学院人工智能学院,福州350015 [2]空军工程大学信息与导航学院,西安710077

出　　处：《物理学报》2022年第3期107-114,共8页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:61701523,61801508);陕西省自然科学基础研究计划(批准号:2020JM-350,20210110,20200108,2020022);博士后创新基金(批准号:BX20180375,2019M653960);大学生创新创业训练计划(批准号:202113468002,S202113468012)资助的课题.

摘　　要：结构型雷达吸波材料不仅可以有效吸收雷达波,还能同时承受载荷,在雷达隐身领域具有重要应用.基于超表面的结构型雷达吸波材料可以实现对雷达波近乎“完美”的吸收,且具有结构轻薄的特点,但其限制在于吸波带宽通常较窄.针对该问题,提出一种拓宽超表面吸波体工作带宽的新方法.该方法利用可重构的思想,通过在超表面中混合集成变容二极管和开关二极管,将吸波频率的连续可调与离散搬移有机结合,以此展宽吸波体的有效吸波带宽.基于该方法,设计了一款超宽带可调超表面吸波体,并深入分析了其吸波机理,通过开关二极管和变容二极管工作状态的调节与配合,在4.57-8.51 GHz内实现了高效可调吸波.实测结果验证了该吸波体的低雷达散射截面特性,证实了设计方法的有效性.所提出的宽带可调设计方法简单可行,还可以拓展应用到其他类型的宽带微波器件设计.Structural radar absorber has important application in stealth field for its ability to effectively absorb incoming radar wave and to bear the load at the same time.Metasurface absorbers can achieve nearly-perfect absorption of radar wave,and have characteristics of light weight and thin structure,but their bandwidth are usually narrow.To solve this problem,a new method of broadening the bandwidth of metasurface absorber is proposed in this work.With varactor and PIN diode integrated in a hybrid manner,the continuous tunning and discrete switching are combined together to broaden the effective absorption bandwidth of the absorber.Using this method,an ultra-wideband tunable metasurface absorber is designed and the absorbing mechanism is analyzed in depth.By changing the bias voltages of PIN diodes and varactors,the absorbing frequency can be continuously tuned within a wide band from 4.57 GHz to 8.51 GHz.Measured results verify the low radar cross section characteristics of the absorber and the effectiveness of the design method.The proposed method is simple and feasible,and can be extended to other broadband structure design.

关 键 词：超表面吸波体 宽带 可调 低雷达散射截面 

分 类 号：TN958[电子电信—信号与信息处理] TB34[电子电信—信息与通信工程]