A Broadband Dual-Mode Monopole Antenna Using NRI-TL Metamaterial Loading

被引：74

作者：

Antoniades, Marco A. ^{[1
]}

Eleftheriades, George V. ^{[1
]}

Rogers, Edward S., Sr. ^{[1
]}

机构：

[1] Univ Toronto, Dept Elect & Comp Engn, Toronto, ON M5S 3G4, Canada

来源：

IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS | 2009年 / 8卷

基金：

加拿大自然科学与工程研究理事会;

关键词：

Folded monopole antenna; metamaterials; negative refractive index;

D O I：

10.1109/LAWP.2009.2014402

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A printed monopole antenna is proposed which uses negative-refractive-index transmission-line (NRI-TL) metamaterial loading in order to achieve a broadband dual-mode operation. The metamaterial-loaded monopole supports a predominately even-mode current at 5.5 GHz, which allows the antenna to be modeled as a short folded monopole. Around 3.55 GHz, the metamaterial-loaded monopole acts as a balun for the ground plane currents, therefore rendering the entire top edge of the ground plane as the main radiating element. This in turn radiates a dipolar mode that is orthogonal to the folded-monopole mode at 5.5 GHz. By virtue of the orthogonality between the two radiating modes, the metamaterial antenna exhibits a return-loss characteristic with a dual resonance, and therefore a very wide measured impedance bandwidth of 4.06 GHz. The total size of the antenna is only 22 30 mm, and the measured efficiency is on the order of 90% at both 3.55 and 5.5 GHz.

引用

页码：258 / 261

页数：4

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