Electromagnetic radiation exposure of multioperator co-sited urban base stations
Electromagnetic radiation exposure of multioperator co-sited urban base stations
Mobile network operators (MNOs) concurrently use different generations of wireless technologies. The basestations (BSs) of different technology generations are co-located in order to decrease operational costs. Furthermore, the MNOs cooperate in order to co-site their base stations. Such an urban site includes more than 25 actively radiatingantennas on average with different frequencies and modulations. Electromagnetic radiation (EMR) measurementsperformed in such an environment may have reduced accuracy. In this paper, the authors propose a new approachfor the measurement of EMR in multiple mobile technology interwoven urban BS sites, where more than one operatorexists. The maintenance activities are also investigated with their frequency of occurrence and their duration for EMRexposure assessment and the statistics are reported for the first time in academia. On sampling the signal strength andradiation in different positions for the tested urban sites, electrical field strengths as high as 90 V/m were observed. Theresults are classified according to frequency bands and possible technologies. The probable bioelectromagnetic effects ofsuch EMR exposure on maintenance workers are discussed with the provision of statistical data of co-located BSs andtheir maintenance activities. A new occupational EMR exposure risk assessment approach is proposed by taking intoconsideration the massive multiinput multioutput (MIMO) antenna technology.
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- [1] Mukherjee S. Analytical Modeling of Heterogeneous Cellular Networks. New York, NY, USA: Cambridge University
Press, 2014.
- [2] Uluaydin NK, Seker SS, Citkaya AY. Application of EM broadband backlobe absorber for antennas. In: Applied
Computational Electromagnetics, 2015 31st International Review of Progress; Williamsburg, VA, USA; 2015. pp.
1-2.
- [3] Schmid G, Neubauer G, Mazal PR. Dielectric properties of human brain tissue measured less than 10 h postmortem
at frequencies from 800 to 2450 MHz. Bioelectromagnetics 2003; 24 (6): 423-430.
- [4] Ibey BL, Roth CC, Ledwig PB, Payne JA, Amato AL et al. Cellular effects of acute exposure to high peak power
microwave systems: morphology and toxicology. Bioelectromagnetics 2016; 37 (3): 141-151.
- [5] Calvente I, Pérez-Lobato R, Núñez MI, Ramos R, Guxens M et al. Does exposure to environmental radiofrequency
electromagnetic fields cause cognitive and behavioral effects in 10-year-old boys? Bioelectromagnetics 2016; 37 (1):
25-36.
- [6] Wuschech H, von Hehn U, Mikus E, Funk RH. Effects of PEMF on patients with osteoarthritis: results of a
prospective, placebo-controlled, double-blind study. Bioelectromagnetics 2015; 36 (8): 576-585.
- [7] Varsier N, Plets D, Corre Y, Vermeeren G, Joseph W et al. A novel method to assess human population exposure
induced by a wireless cellular network. Bioelectromagnetics 2015; 36 (6): 451-463.
- [8] Meo SA, Alsubaie Y, Almubarak Z, Almutawa H, Al Qasem Y et al. Association of exposure to radio-frequency
electromagnetic field radiation (RF-EMFR) generated by mobile phone base stations with glycated hemoglobin
(HbA1c) and risk of type 2 diabetes mellitus. International Journal of Environmental Research and Public Health
2015; 12 (11): 14519-14528.
- [9] Özen Ş, Helhel S, Çerezci O. Heat analysis of biological tissue exposed to microwave by using thermal wave model
of bio-heat transfer. Burns 2008; 34 (1): 45-49.
- [10] Özen Ş, Helhel S, Çolak H. Electromagnetic field measurements of radio transmitters in urban area and exposure
analysis. Microwave and Optical Technology Letters 2007; 49 (7): 1572-1578.
- [11] Özen Ş, Helhel S, Bilgin S. Temperature and burn injury prediction of human skin exposed to microwaves: a model
analysis. Radiation and Environmental Biophysics 2011; 50 (3): 483-489.
- [12] Atilgan E, Coskun O, Comlekci S. Experimental finding of temperature rise and SAR values created by 900 MHz1800
MHz-2450 MHz electromagnetic radiation on human brain tissue. Optoelectronics and Advanced Materials
2015; 9 (9-10): 1224-1229.
- [13] Taheri M, Roshanaei G, Ghaffari J, Rahimnejad S, Khosroshahi BN et al. The effect of base transceiver station
waves on some immunological and hematological factors in exposed persons. Human Antibodies 2017; 25 (1-2):
31-37.
- [14] Das S, Chakraborty S, Mahanta B. A study on the effect of prolonged mobile phone use on pure tone audiometry
thresholds of medical students of Sikkim. Journal of Postgraduate Medicine 2017; 63 (4): 221.
- [15] Buckus R, Strukčinskienė B, Raistenskis J, Stukas R, Šidlauskienė A et al. A technical approach to the evaluation
of radiofrequency radiation emissions from mobile telephony base stations. International Journal of Environmental
Research and Public Health 2017; 14 (3): 244.
- [16] Grudzinski E, Trzaska H. Electromagnetic Field Standards and Exposure Systems. Edison, NJ, USA: SciTech
Publishing, 2014.
- [17] Dlugosz T, Trzaska H. Proximity effects in the near-field EMF metrology. IEEE Transactions on Instrumentation
and Measurement 2009; 58 (3): 626.
- [18] Dlugosz T, Trzaska H. How to measure in the near field and in the far field. Communications and Network 2010; 2
(1): 65.
- [19] Baltrėnas P, Buckus R. Measurements and analysis of the electromagnetic fields of mobile communication antennas.
Measurement 2013; 46 (10): 3942-3949.
- [20] Grudzinski E, Trzaska H. EMF probes calibration in a waveguide. IEEE Transactions on Instrumentation and
Measurement 2001; 50 (5): 1244-1247.
- [21] Trzaska H. Primary and secondary EMF standards. In: Environmental Electromagnetics, The IEEE 2006 4th
Asia-Pacific Conference; Dalian, China; 2006. pp. 769-770.
- [22] Dlugosz T. Bioelectromagnetic effects measurements–SAR and induced current. Bio-Medical Materials and Engineering 2015; 25 (1): 1-7.
- [23] Directive 2004/40/EC of European Parliament and of Council of the Minimum Health and Safety Requirements
Regarding the Exposure of Workers to the Risks Arising from Physical Agents (Electromagnetic Fields) (18th
Individual Directive within the Meaning of Article 16(1) of Directive 89/391/EEC), OJ. Nr. L-184, 2004.
- [24] Turkish Regulatory Agency. Electronic Communications Law, No: 5809, 2008.
- [25] Urbinello D, Joseph W, Verloock L, Martens L, Röösli M. Temporal trends of radio-frequency electromagnetic field
(RF-EMF) exposure in everyday environments across European cities. Environmental Research 2014; 134: 134-142.
- [26] Urbinello D, Huss A, Beekhuizen J, Vermeulen R, Röösli M. Use of portable exposure meters for comparing mobile
phone base station radiation in different types of areas in the cities of Basel and Amsterdam. Science of the Total
Environment 2014; 468: 1028-1033.
- [27] Cansiz M, Abbasov T, Kurt MB, Celik AR. Mobile measurement of radiofrequency electromagnetic field exposure
level and statistical analysis. Measurement 2016; 86: 159-164.
- [28] Haipeng Z, Zheng Q. Test for electromagnetic environment of mobile communication base station. In: Electromagnetic Compatibility, IEEE 2016 Asia-Pacific International Symposium; Shenzhen, China; 2016. pp. 1164-1167.
- [29] Karadağ T, Yüceer M, Abbasov T. A large-scale measurement, analysis and modelling of electromagnetic radiation
levels in the vicinity of GSM/UMTS base stations in an urban area. Radiation Protection Dosimetry 2015; 168 (1):
134-147.