4.7 Article

Composites with Koch fractal activated carbon fiber felt screens for strong microwave absorption

Journal

COMPOSITES PART B-ENGINEERING
Volume 105, Issue -, Pages 1-7

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2016.08.031

Keywords

Carbon fiber; Layered structures; Electrical properties; Thermosetting resin; Koch fractal

Funding

  1. Chinese National Key Research & Development Project [2016YFB0303201]
  2. Research and Innovation Project of Shanghai Municipal Education Commission [14zz069]

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This work presents a strong microwave absorber with Koch fractal activated carbon fiber (ACF) felt screens. The effects of arrangements (spacing d) and structure parameters (iteration number n, initial side-length L) of Koch fractal units on the microwave absorption (MA) properties were investigated. It was observed that the optimal spacing d was obtained at 20 mm, and the reflection loss (RL) decreased in the low frequency-range from 6 to 9 GHz, but increased in the high-frequency range from 16 to 18 GHz apparently with increasing n and L. The strongest MA could reach - 62.8 dB. The relationship between ACF area ratio and RL was described. (C) 2016 Elsevier Ltd. All rights reserved.

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