基于介电常数近零媒质的几何无关双频天线  

Geometry-independent Dual-band Antenna Based on Epsilon-near-zero Dielectric Medium

作　　者：刘虹江 何翼景 孙厚军[1] LIU Hongjiang;HE Yijing;SUN Houjun(School of Integrated Circuits and Electronics,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]北京理工大学集成电路与电子学院,北京100081

出　　处：《微波学报》2024年第S1期56-59,共4页Journal of Microwaves

摘　　要：基于波导等效的近零介电常数(ENZ)超材料可以实现电磁波的零相位差传输,从而实现了辐射特性不受几何形状影响的双频天线。不同于传统的辐射元件,本文采用了光子掺杂技术来实现双频谐振,同时可以提高天线的辐射效率,并且掺杂剂的位置不会影响谐振频率。在本工作中,通过仿真不同形状和拓扑结构的天线,实验验证了这种形状无关的辐射特性,设计的ENZ天线都保持在两个相同的频率下谐振,但远场辐射模式可以根据需求灵活变化,从单波束到多波束、从宽波束到窄波束。这种由材料决定的与几何无关的辐射特性可能为无线通信、传感和波前工程等领域提供更加灵活的设计思路。The epsilon-near-zero(ENZ)metamaterial based on waveguide equivalence can realize zero-phase-difference transmission of electromagnetic waves,thus realizing a dual-frequency antenna whose radiation characteristics are not affected by geometry.Different from traditional radiation elements,this paper adopts photonic doping technology to achieve dual-frequency resonance,which can improve the radiation efficiency of the antenna,and the position of the dopants will not affect the resonance frequency.In this work,by simulating antennas with different shapes and topologies,the shape-independent radiation characteristics are experimentally verified.The designed ENZ antennas maintain resonance at two same frequencies,but the far-field radiation modes can be flexibly changed according to requirements,from single beam to multi-beam,from wide beam to narrow beam.The material-determined-independent radiation characteristics may provide more flexible design ideas for wireless communication,sensing and wavefront engineering.

关 键 词：几何无关天线 双频天线 近零介电常数超材料 方向图可重构 

分 类 号：TN822[电子电信—信息与通信工程]