Electromagnetic energy absorber

Details Electromagnetic energy absorber Electromagnetic energy absorber

1994-06-16

1996-11-19

Lobo, Ian J.

Communications: directive radio wave systems and devices (e.g.,

Radio wave absorber

H01Q 1700

Patent

active

055767109

ABSTRACT:
An electromagnetic energy absorber provides a base 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 impedance layer, can be formed from a resistive sheet formed into a broken pattern that can comprise a series of geometric shapes spaced from each other. The broken pattern is sized to vary the specific impedance of the sheet. The resistive sheet can be combined with a series of composite dielectric layers to form an integral composite structure. Three resistive sheet layers can be provided with predetermined spacings from the ground surface and predetermined impedance to effect broadband absorption characteristics.

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