Abstract
To obtain excellent electromagnetic wave (EMW) absorption materials, the design of microstructures has been considered as an effective method to adjust EMW absorption performance. Owing to its inherent capability of effectively fabricating materials with complex various structures, three-dimensional (3D) printing technology has been regarded as a powerful tool to design EMW absorbers with plentiful microstructures for the adjustment of EMW absorption performance. In this work, five samples with various microstructures were prepared via fused deposition modeling (FDM). An analysis method combining theoretical simulation calculations with experimental measurements was adopted to investigate EMW absorbing properties of all samples. The wood-pile-structural sample possessed wider effective absorption bandwidth (EAB; reflection loss (RL) dB, for over 90% microwave absorption) of 5.43 GHz and generated more absorption bands (C-band and Ku-band) as compared to the honeycomb-structural sample at the same thickness. Designing various microstructures via FDM proved to be a convenient and feasible method to fabricate absorbers with tunable EMW absorption properties, which provides a novel path for the preparation of EMW absorption materials with wider EAB and lower RL.
Highlights
In recent years, electromagnetic wave (EMW) radiation has drawn deep attention due to its great damage to wireless communication and the health of human beings
Recent research indicated that structural EMW absorbers have significantly developed modern stealth materials in their capacity to regulate the macrostructure of absorbers, which play an important role in adjusting the impedance match of EMW absorbers [15,16,17]
A series of electromagnetic waves propagated in the forward direction when a beam of unit amplitude electromagnetic wave was placed perpendicularly on a multilayer absorber
Summary
Electromagnetic wave (EMW) radiation has drawn deep attention due to its great damage to wireless communication and the health of human beings. Massive research projects on EMW absorption materials have proceeded, designing optimized EMW absorbers with a lower reflection loss (RL), a smaller thickness, and a wider effective absorption bandwidth (EAB) remains a serious challenge [6,7,8]. Nanocomposite RAMs have proven to be an effective material to adjust the EMW absorption performance by designing the composition and microstructures of the composite [12,13,14]. Polymers 2020, 12, 1217 with honeycomb cores have been widely investigated and applied as engineering structures for their excellent mechanical and EMW absorption performance [22,23]. The structural design of single-layer absorbing materials prepared by traditional manufacturing systems has been limited. The EMW absorbing performance of all structural conductive ABS samples was investigated by theoretical simulation calculations and experimental measurements. The effects of the microstructures on the EMW absorbing properties of the absorbers were discussed
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