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Measurement and Magnetic Countermeasure Methodology to Deal with Inverter Noise

Yamaguchi, M and Miyazawa, Y and Ma, J and Sato, M and Takahashi, A and Tanaka, S and Nagata, M and Sai, R (2018) Measurement and Magnetic Countermeasure Methodology to Deal with Inverter Noise. In: International Symposium on Electromagnetic Compatibility, EMC Europe 2018, Amsterdam, 27 - 30 August 2018, pp. 608-612.

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Official URL: https://doi.org/10.1109/EMCEurope.2018.8485118


In this paper, the influence of unnecessary radio waves at the receiver circuit of a cell phone handset is suppressed by a new magnetic material in order to contribute to the technology for reliably sharing these different systems at frequencies from 700 MHz to 6 GHz where many radio waves systems are concentrated. The material used is called hexagonal ferrite and is widely used as a permanent magnet material in general. Since this material can generate magnetic losses in a frequency selective manner in and above the SHF band, the fine particles hexagonal ferrite are mixed with a polymer binder to form a powder composite and applied on the wiring on PCB. This component was used as a frequency variable resistor for conduction noise suppression. Performance verification was evaluated by input loss ratio, Ploss / Pin, on the microstrip line based on IEC 62333-2. It became clear that this new noise suppressor has excellent noise suppressing function in the GHz band.

Item Type: Conference Paper
Publication: IEEE International Symposium on Electromagnetic Compatibility
Publisher: Institute of Electrical and Electronics Engineers Inc.
Additional Information: The copyright for this article belongs to Institute of Electrical and Electronics Engineers Inc.
Keywords: Cellular telephone systems; Electric inverters; Ferrite; Magnetic materials; Mobile phones; Permanent magnets; Radio waves; Telephone circuits; Telephone sets; Wireless telecommunication systems, Conduction noise; Hexagonal ferrite; Noise suppressors; Powder composites; Wireless communications, Electromagnetic compatibility
Department/Centre: Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited: 04 Aug 2022 06:52
Last Modified: 04 Aug 2022 06:52
URI: https://eprints.iisc.ac.in/id/eprint/75217

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