An Innovative Virtual Chamber Measurement Method Based on Spatial Domain Cancellation Technique for Radiation Emission In Situ Test

It remains a typical engineering problem demanding prompt solution to measure the electromagnetic radiation of equipments accurately in the complicated electromagnetic environment. A new measurement method for ambient interferences suppression in an in situ radiated emission test is proposed. Technologies of signal processing such as side lobe cancellation and frequency section have been adopted to filter background interferences in a smart way. The suppression effects on different kinds of interferences are studied. The simulation results show that the method can simultaneously suppress multiple interferences, which are either narrowband or wideband, stable or transient. The performance of the method is evaluated by experiments as well. The experimental results show that the pulse modulation interferences can be suppressed remarkably, guaranteeing the radiation characteristic of the testing equipment free of distortion at the same time. This novel method can not only make up shortages of traditional virtual chamber technology, but also has more handleability and convenience for the electromagnetic compatibility in situ test.