基于超表面的宽带滤波天线设计  

Design of Wideband Filtering Antenna Based on Metasurface

作　　者：王璐 陈新伟[1] WANGLu;CHEN Xinwei(School of Physics and Electronics Engineering,Shanxi University,Taiyuan 030006,China)

机构地区：[1]山西大学物理电子工程学院,山西太原030006

出　　处：《山西大学学报（自然科学版）》2024年第5期1062-1067,共6页Journal of Shanxi University(Natural Science Edition)

基　　金：国家自然科学基金(62071282);山西省自然科学基金(202203021211295);山西省留学基金(2021-006)。

摘　　要：本文提出了一种基于超表面的宽带滤波天线。通过分割3×3的超表面,引入了新的谐振点,有效改善了阻抗匹配带宽;另外,通过在馈线上加载阶跃阻抗谐振器(SIR),在工作频带两边分别引入一个辐射零点,而且,在通带内高频段引入了另一个谐振点,进一步展宽了带宽;为了改善低频段的选择性,在地面上刻蚀四个中心对称的U型缺地陷结构(DGS),引入一个辐射零点。仿真表明,设计的滤波天线工作在4.93 GHz~6.88 GHz,-10 dB阻抗带宽达到33.1%,在4.06 GHz、4.4 GHz、7.5 GHz、8.75 GHz产生四个辐射零点,提高了滤波天线的选择性。In this paper,a wideband filtering antenna is proposed based on metasurface.By dividing the 3×3 metasurface,a new resonance is introduced to improve the impedance matching bandwidth.In addition,by adding a step impedance resonator(SIR)to the feed line,a radiation zero is introduced on each of two sides of the working band.Moreover,a new resonance is introduced into the high frequency band of the passband,causing the bandwidth to be further widened.In addition,in order to improve the selectivity of the low frequency,a new radiation zero is introduced by etching four central symmetric U-shaped DGS on the ground.Simulated results show that the designed filtering antenna has the fractional bandwidth of 33.1%(4.93 GHz—6.88 GHz)for S11<-10 dB,and has four radiation zeros at 4.06 GHz,4.4 GHz,7.5 GHz and 8.75 GHz,respectively.

关 键 词：超表面 缺地陷结构 辐射零点 滤波天线 

分 类 号：TN822[电子电信—信息与通信工程]