Shielding Effectiveness Measurements DC to 40 GHz, draft IEEE 2855

The measurement of the shielding effectiveness of shielded cables has been a topic for investigation over several decades and has resulted in a series of internationally agreed standards. The measurement methods used are suited for comparison of shielded cables but ignore the foreseen application of the cables with their applications. With most of the measurement techniques used, a near-ideal application i.e., excitation of the cables is used to allow/ enable this comparison. In real application conditions, cables are NOT terminated at both ends for all propagation modii occurring, neither for the inner wires, nor from the outer structure against its surroundings.