A magnetic-field resonant probe with enhanced sensitivity for RF interference applications

Hao Hsiang Chuang, Guang Hua Li, Eakhwan Song, Hyun Ho Park, Hyun Tae Jang, Hark Byeong Park, Yao Jiang Zhang, David Pommerenke, Tzong Lin Wu, Jun Fan

Research output: Contribution to journalArticlepeer-review


High-sensitive field probes are highly desirable for radio-frequency (RF) interference studies, where ultralow noise levels are of interest. By incorporating an LC resonant circuit in a differential-loop probe, together with a Marchand balun, a magnetic-field probe with enhanced sensitivity is developed. Its equivalent circuit model and design methodology are established. The design is validated by measurements. The measured relative sensitivity in terms |S21| of the proposed probe increases by approximately 8.63 dB at the resonant frequency of 1.575 GHz compared to that of a conventional design. The advantage of the proposed probe is validated through its application in the measurement of a microstrip trace and a real-world cell phone design.

Original languageEnglish
Article number6475176
Pages (from-to)991-998
Number of pages8
JournalIEEE Transactions on Electromagnetic Compatibility
Issue number6
Publication statusPublished - 1 Dec 2013
Externally publishedYes


  • Enhanced sensitivity
  • Magnetic-field resonant probe
  • Marchand balun
  • Receiver desensitization
  • RF interference

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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