摘要
针对原有结构频率选择表面(Frequency Selective Surface,FSS)加工和组装难度大、成本高以及质量大等问题,提出了一种具有双边带陡降特性的带通三维频率选择表面(3D FSS)。设计了一种新型的单元结构,并验证了其可行性。该3D FSS单元结构由一个改进型方同轴波导(SCW)路径和一个平行板波导(PPW)路径组成。改进型SCW路径方形槽谐振和PPW路径半波谐振各产生一个传输极点,形成了二阶平坦通带。由于不同路径之间反相信号的作用,在通带两边产生了2个传输零点,实现了双边带陡降性能。为了理解该3D FSS的工作原理,对传输零极点处的电场矢量分布进行了研究。仿真结果显示,所提出的3D FSS具有二阶平坦通带、高频率选择性、良好的角度稳定性、双极化以及较小的电尺寸等优势。
In view of the difficulties in fabrication and assembly as well as the high cost and heavy weight of the original FSS,a bandpass three-dimensional Frequency Selective Surface(3D FSS)with double-sideband fast roll-off characteristics is proposed.A novel unit cell is designed,and its feasibility is verified.The unit cell of this 3D FSS consists of one improved Square Coaxial Waveguide(SCW)path and one Parallel Plate Waveguide(PPW)path.The SCW path and PPW path each provide one transmission pole,which form a second-order flat passband.Due to the counteraction of out-of-phase signals between different paths,two transmission zeros located at both sides of the passband are introduced,realizing double-sideband fast roll-off performance.In order to understand the working principle of this 3D FSS,the electrical vector distributions at the frequencies of transmission zeros/poles are investigated.The simulated results show that the proposed 3D FSS has the advantages of second-order flat passband,high frequency selectivity,good angular stability,dual polarizations and relatively compact electrical size.
作者
于正永
朱建平
YU Zhengyong;ZHU Jianping(School of Computer and Communication Engineering,Huai’an Vocational College of Information Technology,Huai’an 223003,China;School of Electronic and Optical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)
出处
《无线电工程》
2020年第11期963-969,共7页
Radio Engineering
基金
江苏高校“青蓝工程”资助(中青年学术带头人)
江苏省“333工程”科研资助项目(BRA2018315)
江苏省“333高层次人才培养工程”培养对象资助项目(苏人才办[2018]26号)
江苏省高等学校自然科学研究资助项目(19KJB510002)
江苏省高等职业教育产教融合集成平台资助项目(苏教职函〔2019〕26号)。
关键词
三维频率选择表面
带通
方同轴波导
双极化
陡降特性
three-dimensional frequency selective surface(3D FSS)
bandpass
square coaxial waveguide(SCW)
dual polarizations
fast roll-off characteristics
