A magnetic-field resonant probe with enhanced sensitivity for RF interference applications
Journal
IEEE Transactions on Electromagnetic Compatibility
Journal Volume
55
Journal Issue
6
Pages
991-998
Date Issued
2013-12
Author(s)
H.-H. Chuang
G.-H. Li
E. Song
H.-H. Park
H.-T. Jang
H.-B. Park
Y.-J. Zhang
D. Pommerenke
T.-L. Wu
J. Fan
Abstract
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 of |S 21 | 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.
SDGs
Type
journal article