Electromagnetic field level temporal variation in urban areas

Temporal variations of electric field levels have been continuously monitored over a period of a week at seven different urban locations and the results are presented and analysed. It has been found that electric field level exhibits an important random variation with time. From the results analysis...

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Bibliographic Details
Published inElectronics letters Vol. 41; no. 5; p. 1
Main Authors Sánchez, M García, Cuiñas, I, Alejos, A Vázquez
Format Journal Article
LanguageEnglish
Published Stevenage John Wiley & Sons, Inc 03.03.2005
Subjects
Broadband
Electric fields
Electromagnetic fields
Field strength meters
Measuring instruments
Noise levels
Portability
Temporal logic
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Summary:Temporal variations of electric field levels have been continuously monitored over a period of a week at seven different urban locations and the results are presented and analysed. It has been found that electric field level exhibits an important random variation with time. From the results analysis, it can be concluded that a single 'snapshot' measurement, using a broadband field strength meter, could underestimate the maximum averaged values up to 9 dB. In urban environments a continuous field meter using a portable datalogger would be required to obtain accurate measurements. Alternatively, the compliance with the radiation limits for 99% of the time can be guaranteed from a single 'snapshot' measurement provided that an additional 8 dB margin under the maximum permissible values is considered.
Bibliography:ObjectType-Article-1
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ISSN:0013-5194
1350-911X