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应用科学学报 >

2010 , Vol. 28 >Issue 4: 413 - 416

DOI: https://doi.org/10.3969/j.issn.0255-8297.2010.04.014

电子技术

介电常数色散的异向介质天线

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  • 中国航天科工集团8511 研究所，南京210007
孙永志，博士，研究方向：微波毫米波技术研究、天线设计、异向介质研究等，E-mail: nanshen01@126.com

收稿日期: 2009-07-31

  修回日期: 2010-07-12

  网络出版日期: 2010-07-23

基金资助

国家自然科学基金(60531020)；国家“863”高技术研究发展计划基金(2007AA701)资助

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Metamaterial Antenna Based on Anisotropic Permittivity

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  • Research Institute No.8511, China Aerospace Science Industry Corporation, Nanjing 210007, China

Received date: 2009-07-31

  Revised date: 2010-07-12

  Online published: 2010-07-23

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摘要

 推导出空间色散异向介质的色散特性方程，利用该材料其中一个方向的介电常数在某特定频率附近为零的特性来制作高指向性天线. 研制了一种交叉金属条结构的异向介质，对放置于这种异向介质中的全向偶极天线进行了仿真，辐射场经过此异向介质与空气的交界面后，在自由空间中集中于异向介质与空气界面的法线方向上、频率为11.5GHz时实现了高指向性，其半功率波束宽度为5±，增益为17.68 dB. 仿真结果与实验结果吻合.

关键词： 各向异性异向介质; 色散特性; 高指向天线

本文引用格式

孙永志， 冉立新， 王伟光， 陈秋林， 朱伟强 . 介电常数色散的异向介质天线[J]. 应用科学学报, 2010 , 28(4) : 413 -416 . DOI: 10.3969/j.issn.0255-8297.2010.04.014

Abstract

 We present an equation of dispersion characteristics for anisotropic metamaterial in this paper. In a particular direction, the dielectric constant of the material is zero at certain frequency. This property is used to produce the high-directional antenna. We develop a new metamaterial with a metallic cross-sectional structure, and simulate the radiated field of an omni-directional dipole antenna placed in the metamaterial. The radiated field is concentrated around the normal to the interface between the metamaterial and the air so that to give highly directional radiation. The gain of the antenna is 17.68 dB at 11.5 GHz, and the half power beam width is 5 degrees. The experimental results are consistent with the simulation.

Key words： anisotropic metamaterial; dispersion characteristics; highly directional antenna

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