Interference in Unshielded Twisted Pair Cables Due to ESD

摘要

Interference produced by ESD events in UTP cables is investigated. Typical installation setup of UTP cables connecting differential driver and receiver both placed in shielded enclosures is considered. Experimental results of common and differential interferences obtained adopting different discharge points are presented. Moreover, a suitable full wave model to predict common mode interference is developed by using the commercial software tool Microwave Studio based on the finite integration technique. In the proposed full-wave approach, the ESD generator is simulated by an advanced model which permits to reproduce the discharge current in the contact mode taking into account the load effect. The validation of the proposed numerical prediction model is carried out by comparison with measurements.