M.А.А. Frah1, V.V. Belyaev2, A.B.N. Mustafa3, A.A. Belyaev4

1,2 Peoples' Friendship University of Russia (Moscow, Russia)

1,3 Al Neelain University (Khartoum, Sudan)

2,4 State University of Education (Moscow, Russia)

1 sounak_ali@yahoo.com, 2 vv.belyaev@guppros.ru, 4 aa.belyaev@guppros.ru

The article is devoted to a comprehensive study of the properties of radiofrequency (RF) electromagnetic radiation (EMR) resulting from the action of several sources of electromagnetic radiation in a given area. At each point in the space near the operator, it can be described using a set of values for the instantaneous distribution of the electromagnetic field strength at a certain moment.

Using a three-coordinate RF field strength meter and a low-frequency electromagnetic field strength meter, the parameters of RF electromagnetic pollution emitted by laptops were investigated in combination with interference created by other nearby sources such as mobile phones, Wi-Fi and microwave ovens. Fifteen scenarios were tested with possible combinations of 1, 2, 3 and 4 devices.

The following parameters of electromagnetic pollution were measured: static electric field strength in V/m, magnetic field strength in A/m, radiation power in W/m2. The data obtained are compared with safety limits and guidelines established by the International Commission on Non-Ionizing Radiation Protection (ICNIRP)

A mathematical model of the intensity of electromagnetic pollution near various radio-electronic devices has been developed. The validity of the proposed model, which gives calculated values for different sources and their combinations, is confirmed by the agreement of the calculated and experimental data. The discrepancy between the calculated and experimental values of the EMR electric field strength varies from 1 to 9%, the magnetic field strength from 6 to 17%, and the radiation power from 0.2 to 25% for complex combinations of radiation sources.

It has been experimentally shown that the superimposition of signals generated by various radio-electronic devices can lead to a noticeable excess of the level of permissible exposure of the operator.

Frah M.A.A., Belyaev V.V., Amin B.N.M., Belyaev A.A. Electromagnetic radiation generated by several electronic devices. Achievements of modern radioelectronics. 2024. V. 78. № 11. P. 5–16. DOI: https://doi.org/10.18127/j20700784-202411-01 [in Russian]

1. Makhasin Frah, Belyaev V., Leonisova I. Elektromagnitnoe zagryaznenie ot radiochastotnykh istochnikov i ikh vozdeystvie na cheloveka. Elektronika: Nauka. Tekhnologiya. Biznes. 2020. № 6. С. 70–74. DOI: 10.22184/1992-4178.2020.197.6.70.74. [in Russian]
2. Frah M.A.A., Pavlushkina T., Babinova A., Belyaev V. Protection from electromagnetic pollution by using metal based shielding materials. 2021 J. Phys.: Conf. Ser. 2056 012058.
3. Temaneh-Nyah C., Makche J., Nujoma J. Characterization of Complex Electromagnetic Environment Created by Multiple Sources of Electromagnetic Radiation. International Journal of Electrical, Computer, Energetic, Electronic and Communication Engineering. 2014. V. 8 (11). P. 1755–1759. Scholar.waset.org/1999.5/9999774. https://api.semanticscholar.org/CorpusID:37581714.
4. ICNIRP (International Commission on Non Ionizing Radiation Protection) Guidelines for limiting exposure magnetic and electromagnetic fields (up to 300 GHz). Health Physics. 1998. V. 74(4). P. 494–522.
5. Review of the scientific evidence on dosimetry, biological epidemiological observations, and health consequences exposure to high frequency electromagnetic fields (100 kHz to 300 GHz), ICNIRP 16/2009.
6. Shabani H., Islam M.R., Alam A.H.M.Z., Abd El-Raouf H.E. EM radiation from Wi-LAN base station and its’ effects in human body. 2008 International Conference on Electrical and Computer Engineering, Dhaka, Bangladesh. 2008. P. 86–91. DOI: 10.1109/ICECE.2008.4769178.
7. Sevgi L. Electromagnetic compatibility and electromagnetic pollution. TMMOB Electrical Engineering Society Istanbul Departament Publishing Series, 320 (2000).
8. Vlach P., Bernard Segal, Pavlasek T.J.F. The measured and predicted electromagnetic environment at urban hospitals. Proceedings of International Symposium on Electromagnetic Compatibility. 1995. P. 4–7. URL: https://api.semanticscholar.org/CorpusID:110723068.
9. Temaneh-Nyah C., Makiche J., Nujoma J. Comprehensive Characterization of Complex Electromagnetic Environment. NNGT Int. J. on Networking and Computing. 2015. V. 2. P. 1–6. DOI: 02.IJNC.2015.1.12.
10. Temaneh-Nyah C. Developing a statistical model for electromagnetic enviroment for mobile wireless networks. World Academy of Science, Engineering and Technology. 2012. V. 61. P. 744–747.
11. Temaneh-Nyah C., Nepembe J. Determination of a suitable Correction factor to a radio propagation model for cellular wireless network analysis. Fifth International Conference on Intelligent system, modeling and simulation, ISMS2014, Langkawi, Malaysia. 27-29 January 2014. P. 175–182. IEEE Computer Society. ISBN-978-1-4799-3857-7.
12. Soshnikov A., Migalyov I., Titov E. Principles of functioning of technological module for danger estimation of combined electromagnetic field. Procedia Engineering. 2016. V. 165. P. 1027–1034. 15th International Scientific Conference «Underground Urbanisation as a Prerequisite for Sustainable Development». https://doi.org/10.1016/j.proeng.2016.11.815.
13. Ismail A.F., Sidek N.I., Abdullah K., Hashim W. Predicting Radio Frequency Radiation From Mobile Communication Base stations. International Journal of Computer and Communication Engineering. 2013. V. 2. № 4. P. 482–486. DOI: 10.7763/IJCCE.2013.V2.231.
14. Onishi T., Ikuyo M., Tobita K., Liu S., Taki M., Watanabe S. Radiofrequency Exposure Levels from Mobile Phone Base Stations in Outdoor Environments and an Underground Shopping Mall. Japan. Int J Environ Res Public Health. 2021. V. 18(15): 8068. DOI: 10.3390/ijerph18158068.
15. De Giudici P., Genier J.-C., Martin S., Doré J.-F., Ducimetière P., Evrard A.-S., Letertre T., Ségala C. Radiofrequency exposure of people living near mobile-phone base stations in France. Environmental Research. 2021. V. 194. P. 110500. https://doi.org/10.1016/j.envres.2020.110500.
16. As N., Dilek B., Şahin M., Karan Y. Electromagnetic pollution measurement in the RTE university campus area. Global Journal on Advances in Pure & Applied Sciences. 2014. V. 03. P. 65–72. URL: http://www.world-education-center.org/index.php/paas
17. Malathi S., TirumalaRao G., Rajeswer Rao G. A Prediction Model for Electromagnetic Pollution Index of Multi System Base Stations. International Journal of Engineering Research & Technology (IJERT). 2013. V. 2. № 12. P. 162–166.
18. Frah M.A.A, Belyaev V.V. Evaluation of electromagnetic pollution index (EMPI) emitted from multiple sources. Journal of Physics: Conference Series. 2021. 2056 - 1, 012057. DOI: 10.1088/1742-6596/2056/1/012057. INSPEC:23228663.