An efficient method of EM field modification around transmitting stations

Fryderyk Lewicki, Pawel Scharoch


An efficient practical method for the electromagnetic (EM) fields reduction around transmitting stations has been developed. The project has been stimulated by the necessity to reduce the field levels in the vicinity of transmitting stations, including FM, UHF, cellular base stations and other radiocommunication services, to obey regulations concerning human protection against electromagnetic radiation. The main constraint in the optimization procedure is the requirement to preserve the radiated power ERP of a service in operation. The method joins accuracy with high efficiency, and is based on 3 stages procedure using the antenna numerical models of different levels of approximation. An example is given of its application to a real case of transmitting stations in which the levels of measured EM exceeded the safety limits.


antenna systems, human exposure assessment, non-ionizing radiation, electromagnetic fields (EMF), radiation limits, radiation patterns

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ICNIRP, Guidelines for limiting exposure to time-varying electric, magnetic and electromagnetic field (up to 300 GHz), 1998

IEEE limits: IEEE Std C95.1 – 2005, IEEE Standard for Safety Levels with Respect to Human Exposure to Radio Frequency Electromagnetic Fields, 3 kHz to 300 GHz, October 2005.

Polish regulations: Rozporzadzenie Ministra Srodowiska z dnia 30 pazdziernika 2003 r. w sprawie dopuszczalnych poziomow pol elektromagnetycznych w srodowisku oraz sposobow sprawdzania dotrzymania tych poziomow, Dz.U.2003.192.1883, Warsaw, 2003

ITU-T Recommendation K.70: Mitigation techniques to limit human exposure to EMFs in the vicinity of radiocommunication stations, Geneva 2007.

F. Lewicki, Importance of antenna VRP in radiation protection consideration, Proceedings of XVII International Wroclaw Symposium on EMC, pp. 123 – 126, Wroclaw, Poland 2004.

J. C. Lin, Controversy over cellular mobile-telecommunication base-station-antenna installations, IEEE Antennas and Propagation Magazine, vol. 46, no.1, pp. 155-156, Feb. 2004

J. C. Lin, A research program on the human impact of wireless telecommunications and other electromagnetic-field-emitting systems, IEEE Antennas and Propagation Magazine, vol. 46,no. 6. pp. 161-163, Dec. 2004

J. C. Lin, Radio frequency exposure and safety associated with base stations used for personal wireless telecommunication, IEEE Antennas and Propagation Magazine, vol. 44, no. 1, pp. 180-183, Feb. 2002

O. P. Ghandi, An on site dosimetry system for safety assessment of wireless base stations using spatial harmonic components, IEEE Trans. on Antennas and Propagation, vol. 51, no. 4, pp. 840-847, April 2003

M. Kaluski, L. Stasierski, Electromagnetic field estimation in the vicinity of panel antenna system for FM and TV broadcasting, IEEE Trans. on Broadcasting, vol. 41, no 4, pp. 136-142, Dec. 1995

B. Fourestié, J-C. Bolomey, T. Sarrebourse, Z Altman, J. Wiart, Spherical Near Field Facility for Characterizing Random Emissions, IEEE Trans. on Antennas and Propagation vol. 53, pp. 2582-2589, Aug. 2005

M-Ch. Gosselin, A. Christ, S. K¨uhn, N. Kuster, Dependence of the Occupational Exposure to Mobile Phone Base Stations on the Properties of the Antenna and the Human Body, IEEE Trans. on Electromagnetic Compatibility, vol. 51, no. 2, pp. 227-235, May 2009

B. Thors, M. L. Strydom, B. Hansson, F. J. C. Meyer, K. K¨arkk¨ainen, P. Zollman, S. Ilvonen, Ch. T¨ornevik, On the Estimation of SAR and Compliance DistanceRelated to RF Exposure From Mobile Communication Base Station Antennas, IEEE Trans. on Electromagnetic Compatibility, vol. 50, no. 4, pp. 837-848, Nov. 2008

A. Faraone, R. Y.-S. Tay, K. H. Joyner, and Q. Balzano, "Estimation of the average power density in the vicinity of cellular base-station collinear array antennas,`` IEEE Trans. Veh. Technol., vol. 49, no. 3, pp. 984–996, May 2000.

Y. Adane, A. Gati, M.-F. Wong, C. Dale, J. Wiart, and V. F. Hanna, "Optimal modeling of real radio base station antennas for human exposure assessment using spherical-mode decomposition,`` IEEE Antennas Wireless Propag. Lett., vol. 1, pp. 215–218, 2002.

R. Cicchetti and A. Faraone, "Estimation of the peak power density in the vicinity of cellular and radio base station antennas,`` IEEE Trans. Electromagn. Compat., vol. 46, no. 2, pp. 275–290, May 2004.

J. Cooper, B. Marx, J. Buhl, and V. Hombach, "Determination of safety distance limits for a human near a cellular base station antenna, adopting the IEEE Standard or ICNIRP Guidelines,`` Bioelectromagnetics, vol. 23, no. 6, pp. 429–443, 2002.

P. Bernardi, M. Cavagnaro, R. Cicchetti, S. Pisa, E. Piuzzi, and O. Testa, "A UTD/FDTD investigation on procedures to assess compliance of cellular base-station antennas with human-exposure limits in a realistic urban environment,`` IEEE Trans. Microw. Theory Tech., vol. 51, no. 12, pp. 2409–2417, Dec. 2003.

W. Joseph and L. Martens, "Comparison of safety distances based on the electromagnetic field and based on the sar for occupational exposure of a 900 MHz base station antenna,`` IEEE Trans. Electromagn. Compat., vol. 47, no. 4, pp. 977–985, Nov. 2005.

F. J. C. Meyer, D. B. Davidson, U. Jakobus, and M. A. Stuchly, "Human exposure assessment in the near field of GSM base-station antennas using a hybrid finite element/method of moments technique,`` IEEE Trans. Biomed. Eng., vol. 50, no. 2, pp. 224–233, Feb. 2003

L. Catarinucci, P. Palazzari, and L. Tarricone, "Human exposure to the near field of radiobase antennas—a full wave solution using parallel FDTD,`` IEEE Trans.Microw. Theory Tech., vol. 51, no. 3, pp. 935–940, Mar. 2003.

M. J. van Wyk, M. Bingle, and F. J. C. Meyer, "Antenna modeling considerations for accurate SAR calculations in human phantoms in close proximity to GSM cellular base station antennas,`` Bioelectromagnetics, vol. 26, pp. 502–509, 2005.

EN 50383, Basic standard for the calculation and measurement of electromagnetic field strength and SAR related to human exposure from radio base stations and fixed terminal stations for wireless telecommunication systems, CENELEC, Brussels, August 2002.


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