Abstract
A Xi-shaped meta structure, has been introduced in this paper. A modified split-ring resonator (MSRR) and a capacitive loaded strip (CLS) were used to achieve the left-handed property of the metamaterial. The structure was printed using silver metallic nanoparticle ink, using a very low-cost photo paper as a substrate material. Resonators were inkjet-printed using silver nanoparticle metallic ink on paper to make this metamaterial flexible. It is also free from any kind of chemical waste, which makes it eco-friendly. A double negative region from 8.72 GHz to 10.91 GHz (bandwidth of 2.19 GHz) in the X-band microwave spectra was been found. Figure of merit was also obtained to measure any loss in the double negative region. The simulated result was verified by the performance of the fabricated prototype. The total dimensions of the proposed structure were 0.29 λ × 0.29 λ × 0.007 λ. It is a promising unit cell because of its simplicity, cost-effectiveness, and easy fabrication process.
Highlights
Metamaterials are artificial media with properties that are not readily available in nature.They are electromagnetic periodic structures in which periodicity is smaller than the wavelength of the material
This study presents an electrically-small metamaterial unit cell, based on modified SRR and capacitive loaded strip (CLS), array on a paper substrate for wearable applications
9.15 GHz that are centered at 7.26 GHz and 9.1 GHz, respectively
Summary
Metamaterials are artificial media with properties that are not readily available in nature. They are electromagnetic periodic structures in which periodicity is smaller than the wavelength of the material. Researchers are interested in this field because of its extraordinary electromagnetic properties. Metamaterials can simultaneously show negative permittivity and permeability, which make them different from other materials. The electromagnetic constitutive parameters lie in their construction, and not in the composite of the materials. Some materials show negative permittivity like gold, silver, etc., but the permeability is very difficult to determine in general
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