Evaluation of Pneumatically Sealed Doors for Use in RFI Shielded Enclosures.
Final rept. Jul 69-Jan 71,
NAVAL CIVIL ENGINEERING LAB PORT HUENEME CALIF
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A standard swinging door with fingerstock and pressure bladder recessed into the door periphery has been designed and developed at Naval Civil Engineering Laboratory. This door may be used as a kit and can be installed at any communications center where the shielding effectiveness is degraded by the door. Shielded enclosures at three military installations were visited and examined for operational performance. Each of the enclosures had at least one pneumatically sealed door installed as part of the shielded enclosure. Each enclosure exhibited a shielding effectiveness value of greater than 100 db, in one case, the values were greater than 120 db for frequencies greater than 200 kHz. The shielding effectiveness of the NCEL door was greater than 110 db at MIL-STD-285 test frequencies. Author
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