Accession Number : ADA190374
Title : Low Cost Electromagnetic Shielding Using Drywall Composites: Results of RFI (Radio-Frequency Interference) Testing of a Shielding Effectiveness.
Descriptive Note : Final technical rept.,
Corporate Author : CONSTRUCTION ENGINEERING RESEARCH LAB (ARMY) CHAMPAIGN IL
Personal Author(s) : Williams, Peter F. ; Heyen, Kevin K. ; McCormack, Ray G.
Report Date : OCT 1987
Pagination or Media Count : 60
Abstract : Because of developments in electronics technology, the need for electromagnetic shielding has increased. To reduce the cost of this shielding, new materials are needed. The U.S. Army Corps of Engineers, Fort Worth District (FWD), and the U.S. Army Construction Engineering Research Laboratory (USA-CERL) have developed composite materials which use standard, construction grade, aluminum foil-backed gypsum board in combination with either a metal mesh or lead foil. Special seams for these composites have been designed by U.S. Gypsum Company. USA-CERL evaluated the adequacy of each material and seam design by using radio frequency antennas and receivers to measure its shielding effectiveness when mounted in the wall of a shielded room. These evaluations showed that the composite panels met the specified requirement of 60 decibels (dB) of shielding. The composites were also shown to be adequate for most communications security applications. However, the addition of a seam decreased shielding by as much as 10 dB.
Descriptors : *COMPOSITE MATERIALS, *ELECTROMAGNETIC SHIELDING, ANTENNAS, ARMY CORPS OF ENGINEERS, COMPANY LEVEL ORGANIZATIONS, COMPOSITE STRUCTURES, CONSTRUCTION, COSTS, ELECTRONICS, GYPSUM, LOW COSTS, MESH, METALS, PANELS, RADIO EQUIPMENT, RADIOFREQUENCY, RADIOFREQUENCY INTERFERENCE, RECEIVERS, SECURE COMMUNICATIONS, SHIELDING, SPACE(ROOM).
Subject Categories : Laminates and Composite Materials
Distribution Statement : APPROVED FOR PUBLIC RELEASE