| 摘要 |
A device for preventing energy associated with nearby lightning strikes, electrostatic energy, and/or RF energy from damaging or inadvertently operating or actuating electronic equipment, such as an EED electrical initiation element, includes a bipartite faraday shield. One wall of the bipartite faraday shield is formed of a ferrite element such as disclosed in U.S. Pat. No. 5,036,768 and application Ser. No. 07/584,045. In some cases, the ferrite element can be doped with calcium oxide. The preferred doping range is between 1 and 20 ppm. A specific embodiment of the bipartite faraday shield includes an open-ended metal case with the ferrite device closing the open end of the case.
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