A study on the microwave absorbing honeycomb core embedded with conductive periodic patterned surfaces for the effective dielectric constant

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Periodic patterned surfaces can provide effective dielectric constants to the microwave absorbing honeycomb partition wall depending on the size of the pattern. A characteristic study was conducted for a honeycomb shaped absorber based on the geometric configurations and material properties. The range of the relative permittivity for increasing the absorption bandwidth of the absorber was determined through a parametric study. The imaginary term of the relative permittivity and depth of the wave propagation direction had a significant impact on the bandwidth of the absorber. Moreover, the materials patterned with carbon black-and graphite based conductive inks using the screen-printing method were bonded to each other at intervals and stacked to form a honeycomb shape. Several absorber specimens were fabricated, and their absorption capabilities were measured using a free-space measurement system. Based on the results, the utility of a film-based honeycomb absorber that can continuously maintain broadband absorptivity was verified.
Publisher
ELSEVIER SCI LTD
Issue Date
2022-06
Language
English
Article Type
Article
Citation

COMPOSITE STRUCTURES, v.289

ISSN
0263-8223
DOI
10.1016/j.compstruct.2022.115471
URI
http://hdl.handle.net/10203/297015
Appears in Collection
ME-Journal Papers(저널논문)
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