A Compact, Planar, and CPW-Fed Metamaterial-Inspired Dual-Band Antenna

Author

Si, L.-M. ; Zhu, Wei ; Sun, Hou-Jun

Author_Institution

Beijing Key Laboratory of Millimeter Wave and Terahertz Technology, Department of Electronic Engineering, School of Information and Electronics, Beijing Institute of Technology, Beijing, People´´s Republic of China

Volume

12

fYear

2013

fDate

2013

Firstpage

305

Lastpage

308

Abstract

A novel compact, planar, and coplanar waveguide (CPW)-fed dual-band antenna is designed and proposed using composite metamaterial. Such composite metamaterial consists of an inner split-ring resonator (SRR) and an outer closed-ring resonator (CRR). The composite metamaterial can provide dual-band operation at 2.595–2.654 and 3.185–4.245 GHz with reflection coefficient better than $-$ 10 dB by the two resonant modes of SRR and CRR, respectively. A CPW-fed line with trapeziform ground plane and tapered impedance transformer line is employed to improve the impedance matching of the antenna. The uniqueness of this design is that the inner SRR with size much smaller than the resonant wavelength is used for obtaining the lower narrow frequency band, which makes the dual-band antenna very compact. Antenna parameters, including reflection coefficient, radiation pattern, radiation efficiency, and gain, are analyzed with numerical simulation and experimental measurement. Good agreement between the simulation and measurement is observed.

Keywords

Antenna measurements; Antenna radiation patterns; Dual band; Metamaterials; Microstrip antennas; Resonant frequency; Dual-band antenna; metamaterials; planar antenna; split-ring resonator (SRR);

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2013.2249037

Filename

6470634