期刊
COMPOSITES PART B-ENGINEERING
卷 77, 期 -, 页码 371-378出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2015.03.059
关键词
Carbon fiber; Glass fibers; Layered structures; Electrical properties
资金
- Chinese NSFC [5123300]
- Program of Introducing Talents of Discipline to Universities [111-2-04]
The radar absorbing materials composited of activated carbon fibers (ACF) as wave-absorber and glass fibers (GF) as impedance modifier were successfully prepared. The structure parameters of rectangular ACF felt screen, the influences of GF-piece and the reflection properties were investigated. It was observed that the effective bandwidth (the reflection loss below - 10 dB) increased with the aspect ratio (a/b) increasing, but decreased with aperture spacing (delta) increasing. A double absorption peak (16.1 dB and 14.2 dB) for the optimized configuration (a/b = 3, iota = 5 mm, a = 30 mm) appeared at 5.8 GHz and 16.9 GHz, and a wide absorption bandwidth (4-17.6 GHz) could be achieved. When a 30 mm x 15 mm rectangular aperture was filled by GF-piece of 20 mm x 10 mm, the effective bandwidth was improved to 12.1 GHz. The composites with a wide absorption bandwidth could be achieved via designing the proper element parameters and adjusting the composition of ACF and GF. (C) 2015 Elsevier Ltd. All rights reserved.
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