John Michael Duckworth

US Patent:

20040160378, Aug 19, 2004

Filed:

Feb 13, 2003

Appl. No.:

10/248732

Inventors:

Ted Abrams - Cary NC, US
John Duckworth - Holly Springs NC, US
Gregory O'Neill - Cary NC, US
Ludwik Wodka - Cary NC, US
Arie Slaa - Austin TX, US

International Classification:

H01Q001/52

US Classification:

343/841000

Abstract:

A shield for shielding radio frequency emissions being emitted from a communications antenna. The shield has a first layer of material having the physical property of generally absorbing radio frequency electromagnetic emissions and a second layer of material having the physical property of generally reflecting radio frequency emissions. The first layer of material is positioned between the second layer of material and the communications antenna. Therefore, the first layer of material absorbs a portion of the radio frequency emissions from the communications antenna, and the second layer of material reflects back the remaining emissions to the first layer of material. Therefore, the first layer absorbs a further portion of the remaining emissions. A layer of absorbing material is placed between the combined first & second layers and a material that is transparent to radio frequency emissions and through which the communications antenna radiates radio frequency energy. The purpose of the absorbing material between the transparent material and the combined first & second layers is to minimize escape of radio frequency energy along the transparent material. The radio frequency energy could otherwise escaped around the barrier of the first & second layers due to reflection and refraction of radio frequency energy within the body of the transparent material.

Address:

1105 Linden Rdg Dr, Holly Springs, NC 27540

Phone:

(919)5770344

VIN:

5J8TB18507A011907

Make:

ACURA

Model:

RDX

Year:

2007