Abstract: Based on the theory of multi-conductor transmission line, the crosstalk between a single cable and a UTP (unshielded twisted pairs) cable was studied. The MATLAB and CST were employed to do the theoretical calculation and modeling respectively, and the comparison result proved the validity and accuracy of the proposed model. Based on the UTP model, the shielding layer was used to build the STP（shielded twisted-wire pairs） model according to the ARINC429 specification, and the crosstalk which caused by a large voltage transient happening on the adjacent power line on the aircraft was further analyzed. The distance and length of the cables were chosen as the main factors for studying the impact on the crosstalk. The study played an important guiding role for actual ARINC429 data bus installation on the airplane, and paved the way for analyzing the crosstalk effect of complex cable structure in the future.

Key words: transmission-line, UTP, STP, crosstalk, modeling, simulation