Title :
The Loading Effect of Radio-Frequency Current Probes
Author :
Carobbi, Carlo F M ; Millanta, Luigi M.
Author_Institution :
Dept. of Electron. & Telecommun., Florence Univ.
Abstract :
The loading effect of radio-frequency current probes is here analyzed. A physical model, consisting of a lumped impedance in series with the flow of the current under measurement, is obtained. The correlation between the loading (insertion) impedance and the geometrical and physical characteristics of the probe is clearly described through formulas useful for design purposes. The model is compared with those existing in the technical literature and the main differences are highlighted and discussed. The theoretical predictions are experimentally confirmed. A direct application of the concepts here discussed to the improvement of the accuracy of the V/I type vector impedance measurements is also shown
Keywords :
electric current; electric current measurement; electric impedance; electric impedance measurement; V/I type vector impedance measurements; bulk-current injection probe; electromagnetic compatibility; insertion impedance; loading effect; loading impedance; lumped impedance; radio-frequency current probes; Calibration; Circuits; Current measurement; Electromagnetic compatibility; Equations; Impedance measurement; Magnetic materials; Probes; Radio frequency; Testing; bulk-current injection probe; current probe; electromagnetic compatibility; insertion impedance; loading effect; radio-frequency;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 2006. IMTC 2006. Proceedings of the IEEE
Conference_Location :
Sorrento
Print_ISBN :
0-7803-9359-7
Electronic_ISBN :
1091-5281
DOI :
10.1109/IMTC.2006.328454
