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Artificial Dielectric Fabric

a technology of dielectric fabric and material, applied in the direction of layered products, shielding materials, transportation and packaging, etc., can solve the problems of limiting applicability and material inapplicability to electromagnetic applications

Inactive Publication Date: 2006-11-30
ZABETAKIS DANIEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent describes a new type of material that can be used in electromagnetic applications. It is made by coating a non-conductive material with a metallic material and then measuring its conductivity at microwave frequencies. The material has properties of electromagnetic percolation and a varying dielectric constant over frequency. This invention can be used to create metallized fibers, fabrics, and other materials that can be used for insulation, isolation, and absorption in the electromagnetic field.

Problems solved by technology

These materials are not applicable to electromagnetic applications where low or medium dielectric constants are desired.
This limits applicability since a certain dielectric constant is useful for only a small frequency in many systems.

Method used

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Examples

Experimental program
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Embodiment Construction

[0027]FIG. 1 is illustrative of an electroless metallic deposition process used to generate a conductive fiber to be used in a composite of conductive fibers within a non-conductive matrix. Accordingly, cellulose surface 10 of a cloth or fabric, for example, is treated with metal substance 15 to act as the “catalyst”, activating the surface for further treatment, 20. The treatment is continued, as shown by items 30a-d. Based on existing commercial technology for electroless metallization, Shipley Cataposit 44, a Palladium compound, is used for the catalyst, for example. However, it is important to note, an embodiment of the present invention is not limited to this particular catalyst. Other catalysts have been described in the prior art, including Platinum. The Palladium compound of Cataposit 44 has been found to bind strongly to cellulose and is particularly suitable. In addition, gold or silver fulminate can also be employed as the catalyst. Silver is typically used because it is ...

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Abstract

Artificial dielectric material characterized by an organic matrix composed of woven and / or non-woven fibers coated with a metallic material wherein the article exhibits a measurable conductivity at microwave frequencies when the article is overall non-conductive at DC.

Description

CROSS REFERENCE TO RELATED APPLICATIONS [0001] This application is a Continuation-In-Part of application Ser. No. 10 / 863,849, filed Jun. 7, 2004.BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] This invention relates to the partial metallization of a non-conductive cloth or fabric employed in the manufacture of an artificial dielectric, which includes the dielectric constant varying with frequency. [0004] 2. Description of Related Art [0005] Various procedures exist for metallizing cloth or fabric. These include vapor deposition and electroless plating. Prior art in these fields relates to the production of a metal or metallic coating that will yield the properties of heat resistance, electromagnetic insulation, or reflection or bulk conductivity. [0006] While useful for the various applications for which they are intended, the dielectric constant of a metallic or conductive material is very high (e.g., above 10,000). These materials are not applicable to electrom...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): D04H1/00B32B5/02
CPCD06M11/83H05K9/009H01Q1/273Y10T428/249924
Inventor ZABETAKIS, DANIEL
Owner ZABETAKIS DANIEL