Compact ultra-wideband monopole antenna loaded with metamaterial

• Main Authors: Al-Bawri, Samir Salem, Goh, Hui Hwang, Islam, Md Shabiul, Wong, Hin Yong, Jamlos, M. F., Narbudowicz, Adam, Muzammil, Jusoh, Thennarasan, Sabapathy, Rizwan, Khan, Islam, Mohammad Tariqul
• Format: Article
• Language: English
• Published: MDPI 2020
• Subjects: TJ Mechanical engineering and machinery; TK Electrical engineering. Electronics Nuclear engineering
• Online Access: http://umpir.ump.edu.my/id/eprint/30497/1/Compact%20ultra-wideband%20monopole%20antenna%20loaded%20with%20metamaterial.pdf; http://umpir.ump.edu.my/id/eprint/30497/; https://doi.org/10.3390/s20030796; https://doi.org/10.3390/s20030796
• Institution: Universiti Malaysia Pahang

A printed compact monopole antenna based on a single negative (SNG) metamaterial is proposed for ultra-wideband (UWB) applications. A low-profile, key-shaped structure forms the radiating monopole and is loaded with metamaterial unit cells with negative permittivity and more than 1.5 GHz bandwidth of near-zero refractive index (NZRI) property. The antenna offers a wide bandwidth from 3.08 to 14.1 GHz and an average gain of 4.54 dBi, with a peak gain of 6.12 dBi; this is in contrast to the poor performance when metamaterial is not used. Moreover, the maximum obtained radiation efficiency is 97%. A reasonable agreement between simulation and experiments is realized, demonstrating that the proposed antenna can operate over a wide bandwidth with symmetric split-ring resonator (SSRR) metamaterial structures and compact size of 14.5 × 22 mm2 (0.148 λ0 × 0.226 λ0) with respect to the lowest operating frequency.