The Tailor-Made Cable offers customized EMI shielding to cope with any EMI requirement. To pick the appropriate shielding for a given EMI scenario, the engineers select from a variety of materials and designs. Materials employed embrace all kinds of copper and other high conductivity metals as well as proprietary soft-magnetic alloys to absorb low impedance and magnetic fields. Shielding suppresses the induction, generation, and propagation of interference and unwanted signals. Because of their relative length, cables are the system components highly vulnerable to interference. Longer cables act like antennas that pick up signals from various sources. Shields protect conductors so they cannot act like antennas. Intelligent grouping of conductors, internal shielding of individual conductors, or conductor groups and certain twisting and cabling options can be used to limit electromagnetic interactions. Unshielded cables become EMI victims if routed close to switching power supplies or RF-equipment of any kind. The cabling solution works with metallized foils, round and flat wires, or even corrugated tubing. Small shielding elements like shielding wires are arranged in served groups or bundles or as classical braided shields. Semi-conductive plastics or metal-loaded compounds may be used to enhance shielding as required. Precise prediction of shielding attenuation and surface transfer impedance of shield designs, backed up with a large database, helps to avoid pitfalls. For verifi-cation, cable-shielding properties can be measured with accuracy and repeatability over a range of frequencies extending up to the lower microwave ranges. Such measurements can reveal the optical coverage of a shield is not always sufficient to ensure a good shield. Braiding and serving angles and measures to reduce unwanted longitudinal inductances are as important as increasing size, mass, and coverage of shields.

Leoni
www.leoni-tailormadecable.com