Shielding effectiveness of single conductor flat shielded cables
The shielding effectiveness of single conductor shielded flat cables was studied to determine if shield and conductor geometry changes could reduce shield leakage. Common cable defects were also evaluated to establish their effect on shield effectiveness. Present design configuration flat shielded cables utilizing two shield layers the same width as the center conductor were evaluated using a Singer Stoddart shield leakage detector to establish average reference shield leakage values. Cables with their center conductor width reduced to less than the width of the shield layers were evaluated and compared to the present design cables. The results indicated that cables with reduced center conductor width exhibited significantly less leakage than the present design cables. To determine if further reduction of the center conductor width would increase the leakage attenuation, cables were fabricated with the center conductor width very narrow compared to the shield width. Leakage evaluation showed this to be of no advantage. A sample cable made with a solid wrap-around shield was found to allow much less leakage than the reduced center conductor width design. The shield was fabricated by flattening seamless aluminum tubing around the insulated flat center conductor. Shield defects, shifted conductors, and shifted shield layers were found to increase leakage on the flat cables of both the presently used and the reduced conductor designs.
- Research Organization:
- Bendix Corp., Kansas City, MO (United States)
- DOE Contract Number:
- EY-76-C-04-0613
- OSTI ID:
- 7256890
- Report Number(s):
- BDX-613-1685
- Country of Publication:
- United States
- Language:
- English
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