Miniaturized dual-band antenna array with double-negative (DNG) metamaterial for wireless applications

• Main Authors: Alqadami, A. S. M., Jamlos, M. F., Soh, P. J., Rahim, S. K. A., Vandenbosch, G. A. E., Narbudowicz, A.
• Format: Article
• Published: Springer Verlag 2017
• Subjects: TK Electrical engineering. Electronics Nuclear engineering
• Online Access: http://eprints.utm.my/id/eprint/75338/; https://www.scopus.com/inward/record.uri?eid=2-s2.0-85006434634&doi=10.1007%2fs00339-016-0678-3&partnerID=40&md5=0fc93ae5cd007ff9117ef42e1ff0e4ac

A miniaturized dual-band antenna array using a negative index metamaterial is presented for WiMAX, LTE, and WLAN applications. This left-handed metamaterial plane is located behind the antenna array, and its unit cell is a combination of split-ring resonator, square electric ring resonator, and rectangular electrical coupled resonator. This enables the achievement of a metamaterial structure exhibiting both negative permittivity and permeability, which results in antenna size miniaturization, efficiency, and gain enhancement. Moreover, the proposed metamaterial antenna has realized dual-band operating frequencies compared to a single frequency for normal antenna. The measured reflection coefficient (S11) shows a 50.25% bandwidth in the lower band (from 2.119 to 3.058 GHz) and 4.27% in the upper band (from 5.058 to 5.276 GHz). Radiation efficiency obtained in the lower and upper band are >95 and 80%, respectively.