Common and differential mode characterization of EMI power-line filters from S-parameters measurements

• Main Authors: Regue, J.-R., Ribo, M., Duran, D., Badia, D., Perez, A.
• Format: Conference Proceeding
• Language: English
• Subjects: Applied sciences; Detection, estimation, filtering, equalization, prediction; Electrical engineering. Electrical power engineering; Electrical power engineering; Electromagnetic compatibility; Electromagnetic interference; Electronic equipment and fabrication. Passive components, printed wiring boards, connectics; Electronics; Energy exchange; Exact sciences and technology; Filtering theory; Filters; Impedance; Information, signal and communications theory; Insertion loss; Matrix converters; Miscellaneous; Performance evaluation; Power networks and lines; Scattering parameters; Signal and communications theory; Signal, noise; Telecommunications and information theory; Voltage
• DOI: 10.1109/ISEMC.2004.1349868

A new technique to predict the small signal behavior of EMI power-line filters is presented. This technique is based on S-parameter measurements performed at all the terminals of the power-line filter. These measured S-parameters are converted to a set of modal S-parameters using the presented analytical matrix expressions. The modal S-parameter matrix completely models the small signal behavior of the power-line filter in terms of line and load common and differential modes. From this matrix, information such as common and differential mode insertion loss, modal behavior of the filter at different line and load impedances, and energy transfer between any combination of modes can be obtained.