Accession Number : AD0698720

Title :   SURFACE TRANSFER IMPEDANCE MEASUREMENTS - A PRACTICAL AID TO COMMUNICATION CABLE SHIELDING DESIGN,

Corporate Author : NORTHERN ELECTRIC CO LTD LACHINE (QUEBEC)

Personal Author(s) : Oakley,R. J.

Report Date : DEC 1969

Pagination or Media Count : 21

Abstract : An expository overview of cable shields and shielding quality is given, up to and including the V.H.F. band, leading to the problem of evaluating different shields whilst still at the design stage. The changes in shielding effectiveness brought about by small design changes can be adequately gauged by the measurement of surface transfer impedance on short sample lengths. The frequency range for the measurements presented in this paper on all types of shield is up to 300 MHz. Some experimental results are presented and discussed, including a section on copolymer bonded aluminum sheaths. Here a study was made of the effects of overlap width and bonding copolymer thickness. (Author)

Descriptors :   (*TRANSMISSION LINES, *ELECTROMAGNETIC SHIELDING), DESIGN, ELECTRIC CABLES, ELECTRICAL IMPEDANCE, MEASUREMENT, METAL COATINGS, PLASTIC COATINGS, RADIOFREQUENCY INTERFERENCE, SURFACE PROPERTIES

Subject Categories : Electrical and Electronic Equipment
      Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE