A Resonant E-field Probe for RFI Measurements
Near-field probes with high sensitivity facilitate the identification of the root causes of intrasystem radio frequency interference issues, where weak noise desensitizes the receiver. In the study presented in this paper, a high-sensitivity resonant electric field probe was designed, consisting of an LC resonator loaded by quarter-wave transformers for optimal power transfer at the resonant frequency. Based on the equivalent circuit model, analytical derivations and numerical simulations were performed to illustrate the design methodology. The simulation results agreed well with the measured values. At the resonant frequency of 1.577 GHz, the measured /S21/ from a matched trace to the resonant probe was approximately 6.6 dB higher than that of an equivalently sized broadband probe.
G. Li et al., "A Resonant E-field Probe for RFI Measurements," IEEE Transactions on Electromagnetic Compatibility, vol. 56, no. 6, pp. 1719-1722, Institute of Electrical and Electronics Engineers (IEEE), Dec 2014.
The definitive version is available at https://doi.org/10.1109/TEMC.2014.2354018
Electrical and Computer Engineering
Center for High Performance Computing Research
Second Research Center/Lab
Electromagnetic Compatibility (EMC) Laboratory
Keywords and Phrases
Circuit simulation; Computer simulation; Electric fields; High frequency transformers; Natural frequencies; Power transformers; Radio frequency identification (RFID); Design Methodology; Enhanced sensitivity; Equivalent circuit model; Impedance transformers; Optimal power transfer; Quarter Wave Transformer; Radio frequency interference; RF interference; Probes; receiver desensitization
International Standard Serial Number (ISSN)
Article - Journal
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