In this paper, we investigate the methodologies used in estimating the typical EM (electromagnetic) radiant environment in the basis of the theory about the EM wave’s propagation. We also do the fitting and modification when refer to the practical measured values. The curves in this paper show that the Walfisch-Ikegami Model is comparatively more accurate to predict under the hypothesis of the knife-edge Model while Egli Model and CCIR-370 Model both are also able to estimate the EM if the factor’s modification are taken in to account. Furthermore, Okumura-Hata is the most appropriate model to estimate the EM in cities since it benefits from several properties such as the easiness to gain parameters, the plenty of modification factor, the wide range of frequency, the smallness of error, etc. The estimation result sets bounds to the EM environment near the radiant source to ensure that the EM radiation is blow the international public standard value and meanwhile validates the correctness of the methodology.
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