RF-EMF exposure assessment carried out in an observatory open for general public visits, where there are multiple RF sources in the surrounding area. Fields at some points of interest have exceeded the ICNIRP exposure limits for the general public and, to comply with normative limits, relevant stations reduced their radiated power. Nevertheless, the total electric field strength in the vicinity of the observatory’s metallic parapet still exceeds exposure limits due to re-radiation. Thus, the main broadcast stations reduced even more their transmitted power to comply with the regulatory limits throughout the observatory area. A detailed evaluation is carried out close to metallic objects to assess the re-radiation phenomenon. Additionally, laboratory experiments were carried out to confirm the influence of re-radiation from the metallic parapet.
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The authors would like to thank the city of Joinville and the broadcasting companies that helped in the measurements. This work was partially supported by the Brazilian National Council for Scientific and Technological Development under Grant 301667/2015-2.
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Travassos, X.L., Avila, S.L., Grubisic, S. et al. Electromagnetic Field Exposure Assessment in a Multi Source Telecommunication Environment. Wireless Pers Commun 110, 2213–2225 (2020). https://doi.org/10.1007/s11277-019-06838-5
- Nonoccupational exposure
- EMF limits
- Open site measurement