A method for electromagnetic radiation emission test in electromagnetic interference environment

In this paper, a new measurement method to immune noise for in-situ EMC tests is proposed. Different from the traditional virtual microwave chamber method based on adaptive noise cancellation technology, in the proposed method, technologies in array signal processing such as spatial spectrum estimation and adaptive beamforming are adopted to filter the ambient noise in space domain. This measurement method can effectively filter the co-channel noise and broadband noise, guaranteeing the distortion-free of radiation characteristics of equipment under test at the same time, which is proved by simulation.