T he work objective is to estimate the electromagnetic environment on the roof where a mobile system base station aerial is installed. The problem arises during maintenance, repair, and assembly operations for antenna-feeder devices. The evaluation problem for ecological assessment of the electromagnetic environment at a standard height of two meters above the roof is solved with the computational prediction method. Two strict models are used for electrodynamic simulation of energy flux density, i.e. a two ray model which describes the plane electromagnetic wave diffraction on the flat perfectly conducting roof surface, and finite models of the roof are described with the canonical problem on a wedge of infinite extent. The difference between the developed model and the known ones lies within the research possibility not only in the computational points but within a whole computational plane. In the simulation process, antenna emission characteristics can be set in a number of ways including those obtained from the radiation object specifications, as it is proposed in a well-known technique. The simulation results for energy flux density distribution in a horizontal plane within the roof space are given. Computational points are placed at the square grid nodes with the period of a quarter wavelength of the transmitter. A physical interpretation of the obtained results is given. A safety conclusion on the human presence on the roof with operating directional cel lular antenna of GSM standard is formulated.
electromagnetic environment monitoring, energy flux density, computational prediction method, wave diffraction on a wedge.
Введение. Задачи, связанные с исследованиями экологической ситуации в той или иной области человеческой дея-
тельности, в последнее время приобрели значительную актуальность, что подтверждается большим числом публика-ций, например, [1–15]. Одним из важных направлений в данной области исследований является мониторинг электро-
магнитной обстановки [3–5]. Важность данной задачи обуславливается рядом факторов. Во-первых, широким приме-
нением радиопередающих устройств, превратившим современные мегаполисы в зоны с высоким уровнем техноген-
ных электромагнитных полей. Во-вторых, невозможностью профилактики электромагнитного загрязнения окружаю-
щей среды, поскольку, как отмечено в работе [3], невозможно очистить эфир от нежелательных излучений радиотех-
нических средств, воздействующих на население.
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