A Magnetic-Field Resonant Probe with Enhanced Sensitivity for RF Interference Applications
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 &vbar;S21&vbar; 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.
H. Chuang and G. Li and E. Song and H. Park and H. Jang and H. Park and Y. Zhang and D. Pommerenke and T. Wu and J. Fan, "A Magnetic-Field Resonant Probe with Enhanced Sensitivity for RF Interference Applications," IEEE Transactions on Electromagnetic Compatibility, vol. 55, no. 6, pp. 991-998, Institute of Electrical and Electronics Engineers (IEEE), Dec 2013.
The definitive version is available at http://dx.doi.org/10.1109/TEMC.2013.2248011
Electrical and Computer Engineering
Electromagnetic Compatibility (EMC) Laboratory
Keywords and Phrases
Conventional Design; Enhanced Sensitivity; Equivalent Circuit Model; LC Resonant Circuits; Marchand Balun; Relative Sensitivity; Resonant Probes; RF Interference; Design; Natural Frequencies; Probes; Magnetic-field Resonant Probe; Receiver Desensitization
International Standard Serial Number (ISSN)
Article - Journal
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