Light Weight Shielding for Aegis Cables

Abstract

A rule of thumb that has been developed from expe­ rience and experiment! -jS t hat shielding effec­ tiveness of a double braided cable is roughly 15-20dB more than that of a single braided cable. We were thus interested to find that by careful attention to braid design, a cable could be pro­ duced with a single braid that actually had better shielding effectiveness than a similar existing cable with a double braid. This fact was confirmed by two different laboratories, using a frequency domain technique in one case, and a time domain (EMP) technique in the other. The result was that the single braided cable could replace the double braided cable with no sacrifice in shield per­ formance, but with a considerable saving in size and weight.