STUDY ON ELECTROMAGNETIC-INTERFERENCE OF MULTICONDUCTOR TWISTED-PAIR WIRE CIRCUIT - THE CASE OF 2-CORED TWISTED-PAIR WIRES

The purpose of this study is to clarify the mechanism of electromagnet ic interference of a multiconductor twisted-pair wire circuit. In this study, two-cored (n = 2) twisted-pair wire is treated and a simple mo del of twisted-pair wire is proposed. Using the proposed twisted-pair wire model, crosstalk between twisted-pair wires is predicted. Based o n the calculated and experimental results it is shown that both induct ive and capacitive coupling must be taken into account in order to acc urately predict the crosstalk between twisted-pair wires. For inductiv ely coupled induced voltages, the same technique that is used for the parallel wires has been used; but a new technique is proposed for calc ulation of capacitively coupled voltages. (C) 1997 Scripta Technica, I nc.