A new electromagnetic radiation emission test system

To solve the problem of testing the electromagnetic radiation on-site in electromagnetic compatibility experiments of large electronic equipment, a new electromagnetic radiation test method was studied. Based on the adaptive cancellation method in time-frequency domain, an adaptive cancellation model in time-frequency domain was established and an electromagnetic radiation test system based on the modular instrument structure was proposed which is suitable for the model. The outdoor test results which was carried out with the test system showed that the electromagnetic radiation emission test system can effectively suppress the environmental electromagnetic interference, meanwhile, the radiation emission of electronic equipments can be tested outside very well.