Basic EMC technology advancement for C(3) systems: SHIELD. Volume 4B. A digital computer program for computing crosstalk between shielded cables
Abstract
This report contains the description and verification of a digital computer program, SHIELD, to be used in the prediction of crosstalk in transmission lines consisting of unshielded wires and/or shielded cables. The line may be above a ground plane (Type 1) or within an overall, circular, cylindrical shield which may be solid or braided and a wire (the shielded wire) located concentrically on the axis of the shield. All wires may be stranded and all conductors are treated as imperfect conductors; that is, their per-unit-length impedances are nonzero. Through-braid coupling for braided shields as well as diffusion for both types are included in the model. The shielded cables may have exposed sections at either end (pigtail sections) in which the shielded wire is not covered by the shield. Over these pigtail sections, a pigtail wire, parallel to the shielded wire, connects the shield to the reference conductor at that end via either a short circuit or an open circuit. These pigtail sections are included in the representation to simulate the common practice of terminating a shielded cable in a connector via these pigtail wires. The pigtail sections may be of different lengths. The program is written in FORTRAN IV and should be implementable on a wide range of digital computers.
- Publication:
-
Phase Progress Report
- Pub Date:
- November 1982
- Bibcode:
- 1982scee.rept.....P
- Keywords:
-
- Computer Programs;
- Crosstalk;
- Prediction Analysis Techniques;
- Transmission Lines;
- Digital Computers;
- Electric Conductors;
- Electric Wire;
- Electromagnetic Compatibility;
- Exposure;
- Fortran;
- Mathematical Models;
- Shielding;
- Short Circuits;
- Communications and Radar