Electromagnetic Compatibility (EMC) of CAN+

Inhalt:
With increasing complexity in automobiles, the demand for more bandwidth on communication networks is raising. To tackle this problem, an extension to the well established Controller Area Network (CAN) has been developed: CAN+. Now it is possible to enhance the data rate by 16 times, while being backward-compatible to the standard CAN. This speedup is possible by using partially higher bit rates. In this paper, we analyze if these higher bit rates cause additional electromagnetic problems compared to standard CAN. This is done by building a prototype setup which is measured in a Gigahertz Transverse Electromagnetic Cell (GTEM) cell. The results show that the emission of CAN+ is very close to standard CAN. The frequencies in which CAN+ has transmission problems during electromagnetic radiation are equal to standard CAN. The only difference is that at a 30 MHz higher frequency CAN+ had data errors. These results show that CAN+ can be treated equally to standard CAN in terms of EMC.