Authors: Plamen Dankov, Valda Levcheva , Praveen Sharma
Source: FERMAT, Volume 37, Communication 3, Jan.-Feb., 2020
Abstract: In this paper, we consider the simultaneous influence of the dielectric anisotropy of textile fabrics on the wearable antennas/resonators and their bending. A set of measurements of flat and bent microstrip rectangular resonators on selected pure isotropic and anisotropic textile substrates have been performed, and the results have been compared with simulations. They show that both parameters (actual substrate anisotropy and curvature radius) have concurrent influences on the resonance behavior of such structures and we managed to separate these effects and initially to explain them. These influences are rather complex: they depend on the actual dielectric anisotropy of the textile fabrics (typically 4-12% for such types of woven or knitted materials as we have shown in our previous papers and in this research), from one side, and to the actual curvature of the investigated planar radiators (bending angle/radius), from another side, and on their local combination.
Index Terms: bending, substrate anisotropy, wearable antennas,textile fabrics
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Influence of Dielectric Anisotropy and Bending on Wearable Textile Antenna Properties