FDD LTE移动通信基站电磁辐射影响预测

Prediction of Electromagnetic Radiation Impact of FDD LTE Mobile Communication Base Station

采用轴向功率衰减公式与均匀直线天线阵模型,对FDD LTE基站产生的电磁辐射在轴向、水平及垂直方向上进行了系统计算与预测。结果表明:通信基站电磁辐射主要集中在其轴向区域,当距离超过10.36 m时,功率密度衰减至限值标准以下;当距离天线垂直距离3m时,已经没有超标空间。FDD LTE基站的水平、垂直防护距离可分别定为15m、3m。现场实测结果与理论预测符合性较好。

Axial direction power attenuation formula and uniform collinear array model are employed to calculate and predicate systematically electromagnetic radiation distribution in the axial,vertical and horizontal direction of FDD LTE base station.Results indicate that the electromagnetic radiation is mainly focused on the axial area,when the distance is more than 10.36 m,the power density is below the limitation standard.When the vertical distance is 3 m,there is no space exceeding the standard.Therefore,the protection distance of FDD LTE base station is 15 min horizontal and 3 min vertical direction.The practical monitor results are well agreement with theoretical prediction results.