Low-cost electromagnetic shielding using drywall composites: results of RFI (radio-frequency interference) testing of a shielding effectiveness. Final technical report
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 that use standard, construction-grade, aluminum foil-backed gypsum board in combination with either a metal mesh or lead foil. Special seams for these composites were 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.
- Research Organization:
- Army Construction Engineering Research Lab., Champaign, IL (USA)
- OSTI ID:
- 7150111
- Report Number(s):
- AD-A-190374/9/XAB; CERL-TR-M-88/02
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
42 ENGINEERING
COMPOSITE MATERIALS
SHIELDING MATERIALS
ELECTROMAGNETIC RADIATION
EFFICIENCY
ANTENNAS
CONSTRUCTION
GYPSUM
METALS
PANELS
PROGRESS REPORT
RADIO EQUIPMENT
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM SULFATES
DOCUMENT TYPES
ELECTRICAL EQUIPMENT
ELECTRONIC EQUIPMENT
ELEMENTS
EQUIPMENT
MATERIALS
MINERALS
OXYGEN COMPOUNDS
RADIATIONS
SULFATE MINERALS
SULFATES
SULFUR COMPOUNDS
360602* - Other Materials- Structure & Phase Studies
420800 - Engineering- Electronic Circuits & Devices- (-1989)