Signal Radiation and Transmission Properties of Twisted Wire Pairs in the GHz Range

In system interconnection among very high bit rate telecommunication equipment, Twisted Wire Pairs (TWPs) are still a popular choice due to their superior immunity to external noise. TWPs are used to overcome problems due to crosstalk and radiated emissions. The paper deals with the analysis, in the GHz range, of the radiation and transmission properties of a TWPs running above a reference plane. Special attention is paid to the properties of differential and common mode voltages and currents. TWP is characterized by a three dimensional full wave analysis and its capability of trasmitting over GHz signal is verified.