双通带三维频率选择表面设计及分析  

Design and Analysis of Dual-passband Three Dimensional Frequency Selective Surface

作　　者：于正永 朱建平 丁胜高 唐万春 YU Zhengyong;ZHU Jianping;DING Shenggao;TANG Wanchun(School of Computer and Communication,Jiangsu Vocational College of Electronics and Information,Huai'an 223003,China;Suzhou Changfeng Avionics Co.,Ltd.,Suzhou 215151,China;School of Electrical and Automation Engineering,Nanjing Normal University,Nanjing 210023,China)

机构地区：[1]江苏电子信息职业学院计算机与通信学院,江苏淮安223003 [2]苏州长风航空电子有限公司,江苏苏州215151 [3]南京师范大学电气与自动化工程学院,江苏南京210023

出　　处：《无线电工程》2023年第10期2380-2388,共9页Radio Engineering

基　　金：淮安市自然科学研究计划项目(HAB202238);苏电英才工程;江苏高校“青蓝工程”;江苏省高等学校自然科学研究面上项目(19KJB510002);江苏省“333工程”科研资助项目(BRA2018315)。

摘　　要：为了满足现代通信设备双频带的要求,提出了一种双通带三维频率选择表面(Three Dimensional Frequency Selective Surface,3D FSS)。所提出的3D FSS单元结构是由平行平板波导(Parallel Plate Waveguide,PPW)结构和方同轴波导(Square Coaxial Waveguide,SCW)结构组合而成。在PPW传播路径中,通过加载金属通孔和环形槽,构成2个相同的1/4波长谐振器,在电磁耦合作用下产生二阶低频通带;环形槽处不连续性引起的电磁波反射引入一个传输零点。在SCW传播路径中,通过加载环形槽,构成2个相同的短SCW谐振器,耦合产生二阶高频通带。通过对传输零极点处的电场矢量分布和设计参数进行分析,阐明了3D FSS的工作机理。仿真结果显示,该3D FSS的低频和高频通带3 dB相对带宽分别为10.74%和6.89%,通带比为1.32,单元结构的电尺寸为0.13λ_(0)×0.13λ_(0),具有双极化特性,在0°~40°具有良好的角度稳定性。In order to meet the dual-band requirements of modern communication equipment,a dual-passband Three Dimensional Frequency Selective Surface(3D FSS)is proposed.The proposed 3D FSS unit structure is composed of the Parallel Plate Waveguide(PPW)structure and the Square Coaxial Waveguide(SCW)structure.In the propagation path of PPW,two identical quarter-wavelength resonators are constructed by loading a pair of metallic through-holes and an annular slot,which generates a second-order low-frequency passband by virtue of the electromagnetic coupling.In addition,the reflection of electromagnetic waves caused by discontinuities in the annular slot introduces a transmission zero.In the SCW propagation path,two identical short SCW resonators are formed by loading an annular slot,which are coupled to produce a second-order high-frequency passband.By analyzing the electric-field vector distributions and design parameters at the transmission zeros/poles,the working mechanism of 3D FSS is illustrated.The simulation results show that the 3 dB relative bandwidths of the low-and high-frequency passbands of the proposed 3D FSS are 10.74% and 6.89% respectively;the passband ratio is 1.32;the electric size of the unit structure is 0.13λ_(0)×0.13λ_(0).The proposed 3D FSS has the dual polarization characteristic and good angular stability in the range of 0°~40°.

关 键 词：频率选择表面 双通带 金属通孔 环形槽 

分 类 号：TN713[电子电信—电路与系统]