THE DESIGN OF MULTIWIRE SCREENS

Cables employing braiding and two-layer binder screens, are the most c ommonly employed industrially-manufactured flexible cables (for radio, maritime and other cable products). This is due to the fact that mesh screens combine electrical and mechanical properties in the best way. However, difficulties are encountered in a theoretical determination of the screening characteristics of braiding: It is impossible to obta in a rigorous closed solution, there are contacts between conductor in tersections both within the same lay and between lays in different dir ections whose resistance has an arbitrary distribution, and there is t he problem of the complexity of the field structure near the surface o f the braiding associated with the helical overlapping of the screen c onductors. By applying the method of averaging in [1] to inhomogeneous screening, it is possible to avoid these difficulties. A method is de scribed that makes it possible to calculate the screening attenuation of cable braiding and binder.