检索结果-南通市图书馆

A novel frequency-selective metamaterial to improve helix antenna

Journal of Zhejiang University-Science C(Computers and Electronics) 2012年第5期13卷 365-375页

作者： Iraj ARGHAND LAFMAJANI pejman rezaei Department of Electrical and Computer Engineering Semnan University

A novel frequency-selective metamaterial with negative permittivity and permeability for improving directivity and gain of a helix antenna is presented in this *** proposed metamaterial is composed of two Z-shape resonators printed on opposite sides of a dielectric *** forms of multilayered cells are found to be suitable for antennas and waveguides *** addition,a new method of designing a metamaterial-based helix antenna is presented with high directivity and gain.A comparison on radiation properties is given between the conventional and the new metamaterial-based helix *** comparisons on radiation properties are performed:(1) the effect of proposed Z-structure on monopole,dipole,and helix antennas;(2) the effect of OE3,split-ring resonator (SRR),and proposed Z-structure unit cells on the performance of helix *** results show improvement of parameters such as directivity,gain,and radiation power of the new metamaterial-based helix ***,the combination of Z-structure with the helix antenna shows the best performance.

关键词： Antenna efficiency Negative permittivity Negative permeability Helix antenna Metamaterial

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

DESIGN AND ANALYSIS OF A DUALBAND ANTENNA FOR SMALL LEO SATELLITE APPLICATIONS

DESIGN AND ANALYSIS OF A DUALBAND ANTENNA FOR SMALL LEO SATE...

引用

2004 3rd International Conference on Computational Electromagnetics and Its Applications

作者： Elham Sharifi Moghaddam Noushin Aboutorabian Shervin Amiri Saeed Nikmehr pejman rezaei Iran Telecommunication Research Centre(ITRC) TehranIran Sahand University of Technology Electrical Engineering FacultyTabrizIran Tarbiat Modarres University Department of Electrical EngineeringTehranIran

Dualband antennas have many applications in small LEO satellites since use of these kinds of antennas makes satellite structure simpler,thus it will lead to a low cost and easy construction. Separated Turnstile Antenna(STA) can provide saddle-shaped and hemispherical *** of dualand operation of this antenna has been investigated in this paper and a dual band STA has been designed for the *** ability in making the arbitrary earth covering pattern for data communications and the omnidirectional pattern for satellite control has made a lot of applications in small LEO *** model of STA is analyzed by Moment Method and its gain pattern,polarization and input impedance are ***,Effects of antenna geometrical parameters on its pattern and input impedance have been researched and calculated in the paper.

关键词： Dual band Satellite antennas Low earth orbit satellites Artificial satellites Impedance Costs Data communication Communication system control Wire Pattern analysis

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：