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Sensors 2017, 17(5), 1175; doi:10.3390/s17051175

A Stretchable Electromagnetic Absorber Fabricated Using Screen Printing Technology

School of Electrical and Electronics Engineering, College of Engineering, Chung-Ang University, 221 Heukseok-dong, Dongjak-gu, Seoul 156-756, Korea
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Academic Editor: Vittorio M.N. Passaro
Received: 15 March 2017 / Revised: 18 May 2017 / Accepted: 19 May 2017 / Published: 21 May 2017
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Abstract

A stretchable electromagnetic absorber fabricated using screen printing technology is proposed in this paper. We used a polydimethylsiloxane (PDMS) substrate to fabricate the stretchable absorber since PDMS exhibits good dielectric properties, flexibility, and restoring capabilities. DuPont PE872 (DuPont, Wilmington, CT, USA), a stretchable silver conductive ink, was used for the screen printing technique. The reflection coefficient of the absorber was measured using a vector network analyzer and a waveguide. The proposed absorber was designed as a rectangular patch unit cell, wherein the top of the unit cell acted as the patch and the bottom formed the ground. The size of the patch was 8 mm × 7 mm. The prototype of the absorber consisted of two unit cells such that it fits into the WR-90 waveguide (dimensions: 22.86 mm × 10.16 mm) for experimental measurement. Before stretching the absorber, the resonant frequency was 11 GHz. When stretched along the x-direction, the resonant frequency shifted by 0.1 GHz, from 11 to 10.9 GHz, demonstrating 99% absorption. Furthermore, when stretched along the y-direction, the resonant frequency shifted by 0.6 GHz, from 11 to 10.4 GHz, demonstrating 99% absorption. View Full-Text
Keywords: electromagnetic; absorber; screen printing; stretchable electromagnetic; absorber; screen printing; stretchable
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Jeong, H.; Lim, S. A Stretchable Electromagnetic Absorber Fabricated Using Screen Printing Technology. Sensors 2017, 17, 1175.

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