Shielding Effectiveness of a Superscreen Coaxial Cable Using Magneto-Dielectric Absorber

Flexible coaxial cables with very good shielding effectiveness are necessary in many applications. A single screen made of copper braid often turns out to be insufficient. Finite braiding density limits the maximum achieved shielding effectiveness. In the case of rigid cables, due to 100% coverage, the problem of shielding efficiency is usually not significant. The solid screen allows achieving the required shielding efficiency. If the coaxial cable is shaped only once (usually manually), semi-rigid cables are used to ensure that the required shielding effectiveness is met. In the case of flexible cables, after increasing the density of the braid to the maximum technologically justified values, the improvement of shielding is possible only by using multiple screens. Thus, double screen cables and triple screen cables are used. Triple screen cables allow for very high shielding efficiency values and are often referred to as "superscreen cables". Definitely, increasing the number of layers of the screen increases the stiffness of the cable, which is undesirable.