Reduction of radiated EMI from a CAN transceiver

Abstract

The aim of this work is the evaluation and reduction of the radiated emissions of a CAN transceiver. To reduce the emissions, a set of good EMC (Electromagnetic Compatibility) practices will have to be applied. The possibility of using PLC (Power Line Communications) techniques and its impact in the EMC performance of the system is also considered. We present measurements of the radiated emissions of a realistic CAN node for telemetry applications based on a previously designed CAN transceiver. To do so, we designed and build a sensors board to be connected to the transceiver and we arranged a suitable measurement set-up. Next, we redesigned the CAN transceiver. The set of good EMC practices we applied resulted in a noticeable reduction of the radiated emissions. Finally we evaluated the possibility of using PLC (Power Line Communications) to reduce the number of cables of CAN buses.