TDR of a Connector with Wiring Harness

Automotive wire harness manufacturer Yazaki and ANSYS Channel partner CADFEM GmbH use ANSYS HFSS and high frequency circuit simulation to study the impact of cable twisting and connectors on signal integrity for wire harnesses. Techniques for efficient high frequency 3D simulation of twisted pair cables are discussed as well as impacts of connector mismatch with cable on time domain reflectometry or TDR are analyzed. The presentation concludes with a detailed discussion of a cable-connector-cable interface with detailed analysis of twist pitch along with comparison to measurement.