DocumentCode :
646677
Title :
Effect of cooling on the probe system sensitivity for low signal strength RFI problems
Author :
Guang-Hua Li ; Wei Huang ; Pommerenke, David
Author_Institution :
EMC Lab., Missouri Univ. of Sci. & Technol., Rolla, MO, USA
fYear :
2013
fDate :
5-9 Aug. 2013
Firstpage :
134
Lastpage :
137
Abstract :
Only highly sensitive probe systems can detect the weak field strengths that cause radio-frequency-interference (RFI) problems typically found within cell phones. The sensitivity of the probe systems depends on the probe factor and on the noise floor. The effect of cooling by liquid nitrogen on the received signal strength and the noise floor of three resonant probe systems has been investigated. They operate at the GSM, GPS, and WiFi frequency bands. Cooling increases the Q-factor of these resonant probes, increases the received signal, and lowers the noise floor. The sensitivity of the system, defined as the signal strength at which the Signal-to-Noise Ratio is equal to 0 dB improves by 3-6 dB.
Keywords :
Q-factor; mobile handsets; radiofrequency interference; GPS frequency bands; GSM frequency bands; Q-factor; WiFi frequency bands; cell phones; highly-sensitive probe systems; liquid nitrogen cooling effect; low-signal strength RFI problems; noise floor; probe factor; probe system sensitivity; radiofrequency interference problem; received signal strength; resonant probe systems; signal-to-noise ratio; weak field strength detection; GSM; Global Positioning System; IEEE 802.11 Standards; Magnetic field measurement; Noise; Probes; Q-factor; Quality factor; radio-frequency interference (RFI); resonant magnetic field probe; signal-to-noise ratio;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electromagnetic Compatibility (EMC), 2013 IEEE International Symposium on
Conference_Location :
Denver, CO
ISSN :
2158-110X
Print_ISBN :
978-1-4799-0408-2
Type :
conf
DOI :
10.1109/ISEMC.2013.6670396
Filename :
6670396
Link To Document :
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