A Compact Tri-Band Monopole Antenna With Single-Cell Metamaterial Loading

Zhu, J., Antoniades, M. A. and Eleftheriades, G. V. (2010) A Compact Tri-Band Monopole Antenna With Single-Cell Metamaterial Loading. IEEE Transactions on Antennas and Propogation, 58 4 Article # 5398894: 1031-1038. doi:10.1109/TAP.2010.2041317

Author Zhu, J.
Antoniades, M. A.
Eleftheriades, G. V.
Title A Compact Tri-Band Monopole Antenna With Single-Cell Metamaterial Loading
Journal name IEEE Transactions on Antennas and Propogation   Check publisher's open access policy
ISSN 0018-926X
Publication date 2010-04
Sub-type Article (original research)
DOI 10.1109/TAP.2010.2041317
Volume 58
Issue 4 Article # 5398894
Start page 1031
End page 1038
Total pages 8
Place of publication Piscataway, NJ, United States
Publisher I E E E
Language eng
Formatted abstract
A compact tri-band planar monopole antenna is proposed that employs reactive loading and a defected ground-plane structure. The reactive loading of the monopole is inspired by transmission-line based metamaterials (TL-MTM), which enables the loaded antenna to operate in two modes. The first resonance exhibits a dipolar mode over the lower WiFi band of 2.40 GHz 2.48 GHz, and the second resonance has a monopolar mode over the 5.155.80 GHz upper WiFi band. Full-wave analysis shows that the currents of the two modes are orthogonal to each other, resulting in orthogonal radiation patterns in the far field. The feature of a defected ground-plane, formed by appropriately cutting an L-shaped slot out of one of the CPW ground-planes, leads to the third resonance that covers the WiMAX band at 3.303.80 GHz. Air bridges at the intersection between the antenna and the CPW feedline ensure a balanced current. A fabricated prototype has compact dimensions of 20.0 mm × 23.5 mm × 1.59 mm, and exhibits good agreement between the measured and simulated $S$ parameters and radiation patterns. The measured radiation efficiencies are 67.4% at 2.45 GHz, 86.3% at 3.50 GHz and 85.3% at 5.50 GHz.
Keyword Defected ground plane
Folded monopole antenna
Multiband antenna
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
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School of Information Technology and Electrical Engineering Publications
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Created: Fri, 02 Dec 2011, 16:22:27 EST by Ms Deborah Brian on behalf of School of Information Technol and Elec Engineering