An Exotic Low Frequency Shielded Enclosure

A prototype low-frequency magnetically shielded room sized enclosure was designed and fabricated. The present enclosure was intended to be the first stage of a broadband design. Some shielding theory is given, and the design approach is discussed. Shielding effectiveness data is presented and compared to the performance of other types of enclosures at low frequencies, and analyzed in terms of background requirements for low-frequency MIL-STD EMC methods.