Behavior of crosstalk in environmentally-impacted automotive PCB interconnects and effect on signal transmission

In the automotive industry, interconnect design is impacted by the operational conditions (temperature and humidity) encountered in practice. This paper extends the use of environmentally-dependent dielectric and conductor models, derived in our previous work, to evaluate key metrics for simulated crosstalk-impacted links operating under practical vehicle conditions up to 40 GHz. These metrics include power sum near- and far-end crosstalk (PSNEXT and PSFEXT), and the interconnect crosstalk ratio (ICR). Herein, an analysis of the dependency on temperature and moisture content of crosstalk metrics is presented for two interconnect configurations based on single-ended and differential signaling. Initial observations for PSNEXT and ICR show negligible variation under harsh environmental conditions while PSFEXT shows a considerable reduction as frequency increases.

Content

Subjects

automotive

crosstalk

high-speed

humidity

interconnect

temperature

DDC Class

621.3: Electrical Engineering, Electronic Engineering