A Magnetic-Field Resonant Probe With Enhanced Sensitivity for RF Interference Applications

Author

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

Author_Institution

Taiwan Semicond. & Manuf. Co., Hsinchu, Taiwan

Volume

55

Issue

6

fYear

2013

fDate

Dec. 2013

Firstpage

991

Lastpage

998

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 |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.

Keywords

baluns; cellular radio; interference (signal); radiofrequency spectra; LC resonant circuit; Marchand balun; RF interference applications; circuit model; design methodology; differential-loop probe; enhanced sensitivity; high-sensitive field probes; magnetic-field probe; magnetic-field resonant probe; microstrip trace; radio-frequency interference studies; real-world cell phone design; ultralow noise levels; Impedance; Impedance matching; Magnetic resonance; Microstrip; Probes; Sensitivity; Enhanced sensitivity; Marchand balun; RF interference; magnetic-field resonant probe; receiver desensitization;

fLanguage

English

Journal_Title

Electromagnetic Compatibility, IEEE Transactions on

Publisher

ieee

ISSN

0018-9375

Type

jour

DOI

10.1109/TEMC.2013.2248011

Filename

6475176