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3D-Printed Low-Cost Dielectric-Resonator-Based Ultra-Broadband Microwave Absorber Using Carbon-Loaded Acrylonitrile Butadiene Styrene Polymer

by Jian Ren 1 and Jia Yuan Yin 2,*
1
Department of Electronic Engineering, City University of Hong Kong, Kowloon, Hong Kong 999077, China
2
School of Physics and Optoelectronic Engineering, Xidian University, Xi’an 710071, China
*
Author to whom correspondence should be addressed.
Materials 2018, 11(7), 1249; https://doi.org/10.3390/ma11071249
Received: 21 June 2018 / Revised: 9 July 2018 / Accepted: 12 July 2018 / Published: 20 July 2018
In this study, an ultra-broadband dielectric-resonator-based absorber for microwave absorption is numerically and experimentally investigated. The designed absorber is made of the carbon-loaded Acrylonitrile Butadiene Styrene (ABS) polymer and fabricated using the 3D printing technology based on fused deposition modeling with a quite low cost. Profiting from the fundamental dielectric resonator (DR) mode, the higher order DR mode and the grating mode of the dielectric resonator, the absorber shows an absorptivity higher than 90% over the whole ultra-broad operating band from 3.9 to 12 GHz. The relative bandwidth can reach over 100% and cover the whole C-band (4–8 GHz) and X-band (8–12 GHz). Utilizing the numerical simulation, we have discussed the working principle of the absorber in detail. What is more, the absorption performance under different incident angles is also simulated, and the results indicate that the absorber exhibits a high absorptivity at a wide angle of incidence. The advantages of low cost, ultra-broad operating band and a wide-angle feature make the absorber promising in the areas of microwave measurement, stealth technology and energy harvesting. View Full-Text
Keywords: Microwave absorption; dielectric resonator; 3D printing; Acrylonitrile Butadiene Styrene (ABS), ultra-broadband; periodical structure Microwave absorption; dielectric resonator; 3D printing; Acrylonitrile Butadiene Styrene (ABS), ultra-broadband; periodical structure
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Ren, J.; Yin, J.Y. 3D-Printed Low-Cost Dielectric-Resonator-Based Ultra-Broadband Microwave Absorber Using Carbon-Loaded Acrylonitrile Butadiene Styrene Polymer. Materials 2018, 11, 1249.

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