LOW MAINTENANCE DOOR CLOSURE

WE HOPE TO INVESTIGATE THE POTENTIAL USE OF AN ELECTROMAGNETIC DOOR SEAL AS A COMPONENT IN A LOW MAINTENANCE DOOR CLOSURE. THIS SEAL WILL INSERT A LOSSY FERROMAGNETIC MATERIAL INTO THE PATH BY WHICH ELECTROMAGNETIC ENERGY ENTERS A SHIELDED ENCLOSURE AROUND THE PERIPHERY OF THE DOOR. THE MATERIAL IS EXPECTED TO REFLECT THE INCIDENT FIELD BECAUSE THE FERROMAGNETIC MATERIAL WILL OFFER A HIGH IMPEDANCE TO THE INCIDENT ELECTROMAGNETIC RADIATION. THE MATERIAL WILL ALSO ATTENUATE THE FIELD ENTERING THE ENCLOSURE THROUGH ATTENUATION OF THE ELECTROMAGNETIC WAVE PROPAGATION THROUGH THE LOSSY FERROMAGNETIC MATERIAL. THIS APPROACH HAS THE POTENTIAL OF PROVIDING A LOW MAINTENANCE SEAL BECAUSE THE ATTENUATION DOES NOT RELY ON METAL-TO-METAL CONTACT TO PROVIDE THE DESIRED SHIELDING EFFECTIVENESS. THE PHASE I EFFORT CONSISTS OF DETAILED DESIGN AND FABRICATION AND TESTING OF PROTOTYPE DOOR SEALS.