Application of controller area net bus in array antenna control

To control the antenna array with numerous elements，a multi level communication system based on controller area network (CAN) bus is designed. Firstly, CAN bus topology is analyzed and the basic CAN network structure is derived from the capacity of a single CAN channel. Then, CAN node hardware based on Nios II soft core is proposed. Lastly, application layer communication protocol and application software for array antenna work function are compiled based on CAN 2.0B. Experiment shows that this CAN network can work at baud rate higher than 500k bps, and its jitter time is less than 1 ms. Moreover, this CAN network controls array antennas steadily in high power environment at GW level.