@inproceedings{af65000c19b147f3ba09abc15eeda427,
title = "Optimizing measurement SNR for weak near-field scanning applications",
abstract = "Conventional near-field scanning techniques often employ a general setup such as: broadband near-field probe output connected to a chain of amplifiers through a coaxial cable to a spectrum analyzer. In this paper, we investigated how the signal to noise ratio is influenced by the coaxial connection between the probe output and the first amplifier, types of probes, cooling the probes with liquid nitrogen and the amplifier's noise figure. Eliminating cabling between probe and first amplifier, and using a low noise amplifiers helped increase signal-to-noise ratio by ~10dB. Further, liquid nitrogen is used to cool down a tunable resonant probe. This increases quality factor of the resonance and improves sensitivity. Thus, SNR is further improved by 10-12dB compared to a similar broadband setup.",
keywords = "EMI, GPS, GSM, liquid nitrogen, magnetic field measurement, near field scanning, probe, probe cooling, resonant probes, SNR",
author = "Li Guan and Giorgi Maghlakelidze and Xin Yan and Satyajeet Shinde and David Pommerenke",
year = "2017",
month = oct,
day = "20",
doi = "10.1109/ISEMC.2017.8077955",
language = "English",
series = "IEEE International Symposium on Electromagnetic Compatibility",
publisher = "Institute of Electrical and Electronics Engineers",
pages = "687--691",
booktitle = "2017 IEEE International Symposium on Electromagnetic Compatibility, Signal and Power Integrity, EMCSI 2017 - Proceedings",
address = "United States",
note = "2017 IEEE International Symposium on Electromagnetic Compatibility and Signal/Power Integrity : EMCSI 2017 ; Conference date: 07-08-2017 Through 11-08-2017",
}