Design of an LISN for Low-Frequency Conducted Emissions Measurement

Wan, Lu; Khilnani, Arun D.; Wu, Xinglong; Liu, Xiaokang; Pignari, Sergio A.; Thomas, David W.P.; Sumner, Mark; Grassi, Flavia

Abstract

In this article, a line impedance stabilization network (LISN) with frequency bandwidth extended down to 2 kHz is designed, to address low-frequency measurement not currently aligned by the IEC and CISPR standards. For instance, different evaluation methods and limits are defined for the frequency range from 2 to 150 kHz in IEC 61000-4-7, IEC 61000-4-30, and CISPR 16-2-1. To this end, the limitations of existing LISNs for conducted emission (CE) measurement are first investigated, and a two-stage cascaded filter LISN topology is designed by resorting to multiobjective optimization. To ensure the desired performance, the influence of component tolerance and parasitic effects are studied. Eventually, an LISN prototype was manufactured and characterized. It was proven that the proposed LISN assures improved performance in terms of decoupling factor, voltage division factor, and LISN impedance in the frequency interval starting from 2 kHz.

Citation

Wan, L., Khilnani, A. D., Wu, X., Liu, X., Pignari, S. A., Thomas, D. W., Sumner, M., & Grassi, F. (2025). Design of an LISN for Low-Frequency Conducted Emissions Measurement. IEEE Transactions on Electromagnetic Compatibility, 67(2), 351-361. https://doi.org/10.1109/TEMC.2024.3510390

• Journal Article Type: Article
• Acceptance Date: Nov 21, 2024
• Online Publication Date: Dec 16, 2024
• Publication Date: 2025-04
• Deposit Date: Jan 13, 2025
• Publicly Available Date: Jan 14, 2025
• Journal: IEEE Transactions on Electromagnetic Compatibility
• Print ISSN: 0018-9375
• Electronic ISSN: 1558-187X
• Publisher: Institute of Electrical and Electronics Engineers
• Peer Reviewed: Peer Reviewed
• Volume: 67
• Issue: 2
• Pages: 351-361
• DOI: https://doi.org/10.1109/TEMC.2024.3510390
• Keywords: Impedance , Topology , Automotive engineering , Inductors , Vectors , Frequency measurement , Standards , Resistors , Receivers , Prototypes
• Public URL: https://nottingham-repository.worktribe.com/output/43211936
• Publisher URL: https://ieeexplore.ieee.org/document/10804047