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    Design and fabrication of an E-shaped wearable textile antenna on PVB-coated hydrophobic polyester fabric

    Year: 2017

    Journal: Smart Mater. Struct., Volume 26, OCT

    Authors: Roshni, Satheesh Babu; Jayakrishnan, M. P.; Mohanan, P.; Surendran, Kuzhichalil Peethambharan

    Organizations: Department of Science and Technology, Government of India, New Delhi [SR/S2/CP-114/2012]

    Keywords: screen-printed textile antennas; dielectric; patch antenna; conductive ink

    In this paper, we investigated the simulation and fabrication of an E-shaped microstrip patch antenna realized on multilayered polyester fabric suitable for WiMAX (Worldwide Interoperability for Microwave Access) applications. The main challenges while designing a textile antenna were to provide adequate thickness, surface uniformity and water wettability to the textile substrate. Here, three layers of polyester fabric were stacked together in order to obtain sufficient thickness, and were subsequently dip coated with polyvinyl butyral (PVB) solution. The PVB-coated polyester fabric showed a hydrophobic nature with a contact angle of 91 degrees. The RMS roughness of the uncoated and PVB-coated polyester fabric was about 341 nm and 15 nm respectively. The promising properties, such as their flexibility, light weight and cost effectiveness, enable effortless integration of the proposed antenna into clothes like polyester jackets. Simulated and measured results in terms of return loss as well as gain were showcased to confirm the usefulness of the fabricated prototype. The fabricated antenna successfully operates at 3.37 GHz with a return loss of 21 dB and a maximum measured gain of 3.6 dB.
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