Title :
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
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;
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
DOI :
10.1109/ANTEMURSI.2009.4805042
