Design of a Portable ETC Radio Environment Monitoring Equipment

In order to ensure the reliable communication transaction of ETC, it is necessary to use radio monitoring equipment to regularly monitor the communication status of the RSU antenna in the main communication direction of ETC and the electromagnetic wave working environment around the transaction area. However, traditional large-scale radio monitoring equipment using discrete components and analog RF front-end is not suitable for mobile use in outdoor fields due to its large size and high power consumption. This paper proposes a method for detecting and locating ETC interference sources using the principle of sideband monitoring and the signal source location characteristics of phased array antennas and array scanning antennas multi-beam scanning, which greatly reduces the weight and cost of the equipment.