A compact and broadband NRI-TL metamaterial monopole antenna

Author

Antoniades, Marco A. ; Eleftheriades, George V.

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Toronto, Toronto, ON

fYear

2009

fDate

15-18 Feb. 2009

Firstpage

1

Lastpage

4

Abstract

A compact and broadband negative-refractive-index transmission-line (NRI-TL) metamaterial antenna is proposed, which consists of a conventional printed monopole loaded in a left-handed fashion. The metamaterial loading allows the antenna to be modeled as a short folded monopole around 5.5 GHz, and simultaneously acts as a a balun for the ground plane around 3.55 GHz, therefore enabling the ground plane to radiate at this frequency. Consequently, the metamaterial-loaded monopole antenna exhibits a very wide impedance bandwidth by virtue of the orthogonality between these two radiating modes. The NRITL metamaterial monopole antenna has a simulated -10 dB return-loss bandwidth of 3.84 GHz while maintaining a very high efficiency in the order of 90%, and achieves orthogonal pattern diversity in both the 3.3 - 3.8 GHz WiMax and 5.15 - 5.85 GHz WiFi bands.

Keywords

antenna radiation patterns; baluns; broadband antennas; metamaterials; microwave antennas; monopole antennas; refractive index; transmission lines; WiFi band; WiMax band; antenna radiating mode; balun; bandwidth 3.84 GHz; broadband NRI-TL metamaterial; broadband antenna; frequency 3.3 GHz to 3.8 GHz; frequency 5.15 GHz to 5.85 GHz; ground plane; left-handed fashion; monopole antenna; negative-refractive-index transmission-line; return-loss bandwidth; Antenna arrays; Apertures; Broadband antennas; Current distribution; Electromagnetics; Geometry; Metamaterials; Paper technology; Phased arrays; Power generation;

fLanguage

English

Publisher

ieee

Conference_Titel

Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting, 2009. ANTEM/URSI 2009. 13th International Symposium on

Conference_Location

Toronto, ON

Print_ISBN

978-1-4244-2979-0

Electronic_ISBN

978-1-4244-2980-6

Type

conf

DOI

10.1109/ANTEMURSI.2009.4805042

Filename

4805042