Study on a Broadband Electrically Small Antenna

SHAO Yu; CHEN Zhang-you

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Study on a Broadband Electrically Small Antenna

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- Study on a Broadband Electrically Small Antenna
- Acta Electronica Sinica Vol. 39, Issue 3, Pages: 719-722(2011)
- 作者机构：
  
  武汉大学电子信息学院,湖北,武汉,430079
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN82
- Published：2011
- 稿件说明：
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SHAO Yu, CHEN Zhang-you. Study on a Broadband Electrically Small Antenna[J]. Acta Electronica Sinica, 2011, 39(3): 719-722.
DOI：

SHAO Yu, CHEN Zhang-you. Study on a Broadband Electrically Small Antenna[J]. Acta Electronica Sinica, 2011, 39(3): 719-722. DOI：

摘要

本文提出了一种天线结构

即用单极子向Γ结构进行电磁耦合馈电.仿真和实测结果表明

和普通单极天线相比

该天线能够将高度降低一半

并将相对带宽展宽到66%

实现了天线的小型化和宽带化.该天线的相频特性为线性

输出信号波形失真较小

可发送宽带信号.经过特殊的设计

还可以改善匹配和增益

使天线在整个工作带宽范围内的驻波比小于2

增益得到提高.

Abstract

This paper presents a type of antenna structure

in which a Γ structure is fed by monopole through electromagnetic coupling.Simulation and experimental results show that

compared to the general monopole antenna

the height of this antenna can be cut in half

the relative bandwidth can be broadened to 66%.So this structure achieves miniaturization and broadband of antenna.Signal radiated by this antenna has a linear phase-frequency character and small distortion

so it can be used to send broadband signals.By special designing

we can improve matching and the gain.The VSWR(Voltage Standing Wave Ratio) is less than 2 in the whole working bandwidth

while the gain increases about 2 dBi at the low frequency of the working bandwidth and 1 dBi at the high frequency.

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