Transfer Impedance Measurement of Shielded Cables Through Localized Injection

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This letter presents a method to determine experimentally the transfer impedance of electrically short shielded cables up to 100 or 150 MHz (depending on the cable length). The proposed method aims to create a disturbance along the cable shield with a localized injection device as for instance a toroidal magnetic probe. Two different experimental setups referred as “scalar” and “vectorial” setups are proposed. The validations are performed on cables of known transfer impedance with respect to other experimental techniques and theoretical formulations. The presented results exhibit the advantages and drawbacks of both setups with respect to the existing experimental methods.