Shielding Effectiveness of Copper-Clad Steel Materials for Communications Shielding.

摘要

The objective of this paper is to determine the shielding effectiveness of copper-clad stainless steel shields in order to compare their performance with other conventional shield materials such as pure copper, copper alloys, and copolymer coated aluminum. A short review of a number of techniques for measuring shielding effectiveness of cable shielding is given. The techniques selected for this paper were the Gooding and Slade Method and the Reduction Factor Method. It is shown that these two methods measure the differential mode and the common mode response of the cable respectively. A test jig was prepared to permit both measurements to be made sequentially under controlled conditions. Data are presented in tables and as curves of shielding effectiveness as a function of frequency over the range of 60 Hz to 150 kHz. The clad metals are shown to have equal or superior shielding effectiveness. (Author)