The electromagnetic properties of re-entrant dielectric honeycombs

Dielectric honeycombs are cellular materials often used in applications that require structural and electromagnetic characteristics, e.g., in LO (low observable) and radome components. A re-entrant (or auxetic) honeycomb is a cellular material with structural properties that are superior to those of...

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Bibliographic Details
Published in:IEEE microwave and guided wave letters 2000-11, Vol.10 (11), p.451-453
Main Authors: Smith, F.C., Scarpa, F., Chambers, B.
Format: Article
Language:English
Subjects:
Acoustic waves
Anisotropic magnetoresistance
Auxetic materials
Biological materials
Cellular
Cellular structure
Cross-disciplinary physics: materials science
rheology
Dielectric materials
Electromagnetic measurements
Electromagnetic properties
Exact sciences and technology
Finite difference method
Finite difference methods
Finite difference time domain method
Geometry
Honeycomb
Honeycomb construction
Materials science
Permittivity measurement
Physics
Porous materials
granular materials
Radomes
Specific materials
Time domain analysis
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Summary:Dielectric honeycombs are cellular materials often used in applications that require structural and electromagnetic characteristics, e.g., in LO (low observable) and radome components. A re-entrant (or auxetic) honeycomb is a cellular material with structural properties that are superior to those of a conventional honeycomb. By employing the finite-difference time-domain (FDTD) technique with periodic boundary conditions, the electromagnetic properties of re-entrant honeycombs are determined and compared to those of a conventional honeycomb. Re-entrant honeycombs are shown to have substantially superior electromagnetic properties. Measured permittivity data are used to substantiate the conclusions based on predicted FDTD data. The use of re-entrant honeycombs, rather than conventional honeycombs, in LO and radome applications can yield improved structural and electromagnetic performance.
ISSN:1051-8207
2771-957X
1558-2329
2771-9588
DOI:10.1109/75.888829