Electromagnetic energy absorbing structure
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United States of America Patent
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-
Jun 28, 1994
Issued Date -
N/A
app pub date -
May 15, 1992
filing date -
Nov 25, 1986
priority date (Note) -
Expired
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Abstract
An electromagnetic energy absorbing structure provides a base structure having an electrically conductive ground plane positioned thereover. At least one dielectric and one impedance layer are positioned over the ground plane or surface on a side thereof opposite the base. An external most dielectric skin seals the structure. Additional alternating dielectric and impedance layers can be positioned over the first dielectric and impedance layers. The dielectric layer can be constructed from syntactic foam with impedance layers formed from patterns of conductive dipoles. The impedance layer, can alternatively, be formed from a resistive sheet formed into a broken pattern that may comprise a series of geometric shapes spaced from each other. The resistive sheet can be combined with a series of composite dielectric layers to form an integral composite structure.
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