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Article
Common-Mode Filters with Interdigital Fingers for Harmonics Suppression and Lossy Materials for Broadband Suppression
IEEE Transactions on Electromagnetic Compatibility
  • Qian Liu
  • Guanghua Li
  • Victor Khilkevich, Missouri University of Science and Technology
  • David Pommerenke, Missouri University of Science and Technology
Abstract
Common-mode (CM) noise on differential microstrip lines can be suppressed by PCB-embedded filters. These filters use resonating or broadband structures such that only the field from the CM signal couples to them. Based on a quarter-wavelength resonator, a new PCB filter is designed having an electrical size of only 0.15 λ × 0.065 λ, where λ is the effective wavelength in the CM filter. Its interdigital structure is also capable of suppressing higher order harmonics of the CM signal and can be used for USB 3.0 to mitigate electromagnetic interference. Further, a novel broadband suppression structure is described that uses magnetically lossy material to suppress the CM signal from 4.6 to 20 GHz without strongly affecting the intended differential signal.
Department(s)
Electrical and Computer Engineering
Keywords and Phrases
  • Electromagnetic pulse,
  • Organic pollutants,
  • Polychlorinated biphenyls,
  • Broadband structures,
  • Common-mode filters,
  • Differential signal,
  • Effective wavelength,
  • Harmonics suppression,
  • Higher order harmonics,
  • Interdigital structures,
  • Quarter wavelength resonator,
  • Signal interference,
  • Broadband filter,
  • narrowband filter
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2015 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.
Publication Date
12-1-2015
Citation Information
Qian Liu, Guanghua Li, Victor Khilkevich and David Pommerenke. "Common-Mode Filters with Interdigital Fingers for Harmonics Suppression and Lossy Materials for Broadband Suppression" IEEE Transactions on Electromagnetic Compatibility Vol. 57 Iss. 6 (2015) p. 1740 - 1743 ISSN: 0018-9375
Available at: http://works.bepress.com/david-pommerenke/58/