Open AccessMiniaturised planar‐patch antenna based on metamaterial L‐shaped unit‐cells for broadband portable microwave devices and multiband wireless communication systems
Author(s) -
Alibakhshikenari Mohammad,
Virdee Bal S.,
Ali Abdul,
Limiti Ernesto
Publication year - 2018
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2016.1141
Subject(s) - metamaterial , metamaterial antenna , patch antenna , microstrip antenna , wideband , planar , antenna efficiency , optics , physics , electrical engineering , antenna factor , optoelectronics , antenna (radio) , materials science , engineering , computer science , computer graphics (images)
This study describes the design of a metamaterial planar antenna for multi‐octave band operation. The metamaterial unit‐cell comprises L‐shaped slit which is etched inside a rectangular patch with a grounded inductive spiral. The slit essentially behaves as a series left‐handed capacitance and the spiral as a shunt left‐handed inductance. The antenna was modelled and optimised for impedance bandwidth, gain and efficiency performance using commercial three‐dimensional full‐wave electromagnetic simulation tools. The antenna has a measured impedance bandwidth of 6.02 GHz for S 11 <−10 dB. This corresponds to a fractional bandwidth of 172.49%, which is higher than multiband planar antennas reported to date. The antenna has a maximum gain and efficiency performance of 3.7 dBi and 73%, respectively, at 3.25 GHz. The physical footprint of the antenna is comparable to other wideband planar antennas reported to date. The overall size of the antenna is 0.037 λ 0 × 0.027 λ 0 × 0.002 λ 0 and 0.25 λ 0 × 0.18 λ 0 × 0.017 λ 0 , where λ 0 is free‐space wavelength at 0.48 and 3.25 GHz, respectively.