Abstract
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.
Highlights
In the past decades, an essential amount of research has been dedicated to planar antennas that allow one to use the increased spectrum demanded for modern wireless communication systems [1,2].Nowadays, the development of planar wideband antennas supports applications requiring high data rates, very precise localization, and high-resolution radar systems [3,4,5]
This paper presents a compact ultra-wideband monopole antenna using single negative (SNG) metamaterial cells for wide bandwidth applications
A compact ultra-wideband (UWB) antenna integrated with an array of metamaterial cells with
Summary
An essential amount of research has been dedicated to planar antennas that allow one to use the increased spectrum demanded for modern wireless communication systems [1,2]. The development of planar wideband antennas supports applications requiring high data rates, very precise localization, and high-resolution radar systems [3,4,5]. A narrow bandwidth is one of the drawback’s challenges that limits the usages of wideband modern wireless applications. To circumvent these challenges, various techniques have been developed recently. By tuning RIS between magnetic and electric conductor (PEC and PMC) surfaces, antenna size can be miniaturized with a noticeable enhancement in bandwidth property
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