摘要
设计了一种新型集总电阻加载超宽带薄型频率选择表面(FSS)吸波体。该吸波体使用单层单谐振FSS损耗层结构,具有厚度薄、宽带吸波且极化稳定的特点。FSS损耗层单元结构采用非单元中心对称轴集总电阻加载方法,并结合非均匀金属导带宽度和圆顶枝节加载设计有效拓宽了吸波带宽。该吸波体的等效电路分析及全波仿真结果均表明该结构在6.0~26.77 GHz频段内对电磁波吸波率能够达到90%,相对带宽达到126.8%。该吸波体总厚度为0.086λ_(L)(λ_(L)为吸波频段最低频率对应波长),仅为Rozanov理论极限厚度的1.09倍。对该吸波体进行加工与测试,实测结果与仿真结果一致,验证了设计的有效性。
This paper presents an novel ultra-wideband thin frequency selective surface(FSS)absorber loadedwith lumped resistors.The proposed absorber consists of a single FSS lossy layer with a single resonance structure,and it features thinness,ultra-wide bandwidth and polarization-insensitivity.The absorber is designed with lumpedresistors loaded at positions that deviates from the central symmetry axis of the unit cell.It also features thenonuniformly wide metallic strips and the addition of branches with circular tops.All these specific design effectivelyenhances the bandwidth of the absorber.Both an equivalent circuit model and full wave simulation demonstrate thatthe proposed absorber achieves over 90%absorption in the frequency range of 6.0−26.77 GHz,with a fractionalbandwidth of 126.8%.The thickness of the proposed absorber is 0.086λ_(L)(λ_(L) is the wavelength at the lowestfrequency),which is only 1.09 times the ultimate thickness based on Rozanov’s theory.A prototype of the proposedabsorber is fabricated,and good agreements between experimental and simulated results are observed,validating theeffectiveness of the design.
作者
李希
王东俊
张袁
赵翔
闫丽萍
Li Xi;Wang Dongjun;Zhang Yuan;Zhao Xiang;Yan Liping(College of Electronic and Information Engineering,Sichuan University,Chengdu 610065,China;Chengdu Aircraft Industry(Group)Company Limited,Chengdu 610073,China;School of Electronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 611731,China)
出处
《强激光与粒子束》
CAS
CSCD
北大核心
2024年第6期81-87,共7页
High Power Laser and Particle Beams
基金
国家自然科学基金区域联合创新基金项目(U22A2015)。
关键词
频率选择表面
电路模拟吸波体
薄型
超宽带
集总电阻加载
frequency selective surface
circuit analog absorber
thin
ultra-wideband
lumped resistor loaded
