Title :
A Study on the Effective Permittivity of Carbon/PI Honeycomb Composites for Radar Absorbing Design
Author :
Zhou, Peiheng ; Huang, Liru ; Xie, Jianliang ; Liang, Difei ; Lu, Haipeng ; Deng, Longjiang
Author_Institution :
State Key Lab. of Electron. Thin-film & Integrated Devices, Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
Radar absorbing honeycomb composites with different coating thicknesses are prepared by impregnation of aramid paper frame with solutions containing conductive carbon blacks (non-magnetic) and PI (polyimide). Expressions for the effective permittivity of the composites are studied and validated both in theory and experiment. It is found that a theoretical equivalent panel with given permittivity can be obtained to represent the honeycomb structure in the quasistatic approximation, which provides a feasible way to optimize the design of radar absorbing honeycomb structure by connecting the effective electromagnetic parameters with the unit cell dimensions. The effective permittivity is measured by a network analyzer system in the frequency range of 8-12 GHz and compared with the theoretical result.
Keywords :
honeycomb structures; network analysers; permittivity; polymers; radar signal processing; aramid paper frame; carbon/PI honeycomb composites; coating thicknesses; conductive carbon blacks; effective permittivity; frequency 8 GHz to 12 GHz; network analyzer system; polyimide; quasistatic approximation; radar absorbing design; Coatings; Electromagnetics; Honeycomb structures; Materials; Permittivity; Permittivity measurement; Radar; Coated honeycomb; effective permittivity; radar absorbing structure; reflection coefficient;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2012.2201120
