The Study of Dielectric Constant Inversion of Coconut Fiber/Gypsum Composite Based on the λ/4 Absorption Spectrum

Abstract:

The measurement of the complex permittivity of big structure composite material has always been a key and difficulty in the preparation of electromagnetic functional materials. In this paper the average dielectric constant inversion of coconut fiber/gypsum composite in S band is studied based on λ/4 absorption spectrum. First the absorbing effects of the prepared coconut fiber gypsum composite materials are tested with method of flat reflection. Then the equivalent complex permittivity is inversed with the inversion theory. Further the experimental verification is preceded that the theoretical and experimental absorbing curves whose peak positions are respectively at 3.05GHz and 2.45GHz are quite matched. And the study shows that this method is scientific and effective, and it can provide technical support for the baroque electromagnetic functional composite materials.

• Periodical: Advanced Materials Research (Volumes 1030-1032)
• Pages: 400-403
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1030-1032.400
• Online since: September 2014
• Authors: Qian Qian Chu, Hui Chao Zhao, Wan Jun Hao*, Ying Ying Yi, Yi Feng Dong, Xin Dan Yu
• Keywords: Absorbing Properties, Coconut Fiber, Complex Permittivity, Gypsum Board, Inversion

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