Shield system and sandwich seam for attenuation of electromagnetic energy

摘要

A structure for attenuating the passage of electromagnetic energy includes at least two panels made of electromagnetic energy attenuating material having adjacent edges thereof disposed in near abutment to form at least a portion of an enclosure. Electromagnetic energy attenuating strips are disposed astraddle and lengthwise of the adjacent edges of the panels on opposed faces thereof, with the strips being in intimate, face-to-face contact with the panels. Fastening means are employed to connect and compress strips and panels together in a sandwich seam and in a manner that doubles the length of travel for any radiated energy attempting to travel between the strips and panels. The attenuation effected by the seam is enhanced by placing a thin layer or coating of lossy material between at least one of the strips and abutting panels.