Miniaturized planar-patch antenna based on metamaterial L-shaped unit-cells for broadband portable microwave devices and multiband wireless communication systems

Alibakhshikenari, Mohammad, Virdee, Bal Singh, Ali, Abdul and Limiti, Ernesto (2018) Miniaturized planar-patch antenna based on metamaterial L-shaped unit-cells for broadband portable microwave devices and multiband wireless communication systems. IET Microwaves, Antennas & Propagation, 12 (7). pp. 1080-1086. ISSN 1751-8733

Abstract

This paper 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 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 modeled and optimized for impedance bandwidth, gain and efficiency performance using commercial 3D full-wave electromagnetic simulation tools. The antenna has a measured impedance bandwidth of 6.02 GHz for S11 < -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

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