A waveguide-based two-step approach for measuring complex permittivity tensor of uniaxial composite materials

2006 ◽  
Vol 54 (5) ◽  
pp. 2011-2022 ◽  
Author(s):  
M.J. Akhtar ◽  
L.E. Feher ◽  
M. Thumm
Keyword(s):  
Composite Materials ◽  
Complex Permittivity ◽  
Permittivity Tensor ◽  
Measuring Complex

Efficient model of an open-ended coaxial-line probe for measuring complex permittivity

2000 ◽  
Author(s):  
Hyun Shin ◽  
Seung-Yeup Hyun ◽  
Sang-Wook Kim ◽  
Se-Yun Kim
Keyword(s):  
Complex Permittivity ◽  
Coaxial Line ◽  
Measuring Complex

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

2014 ◽  
Vol 1030-1032 ◽  
pp. 400-403
Author(s):  
Qian Qian Chu ◽  
Hui Chao Zhao ◽  
Wan Jun Hao ◽  
Ying Ying Yi ◽  
Yi Feng Dong ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Composite Material ◽  
Absorption Spectrum ◽  
Composite Materials ◽  
Experimental Verification ◽  
Complex Permittivity ◽  
Functional Materials ◽  
Coconut Fiber ◽  
Inversion Theory ◽  
Equivalent Complex

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.

Sign in / Sign up

Export Citation Format

Share Document