Electromagnetic interference and protection of shared iron tower base station antenna to online monitoring equipment

According to the electromagnetic compatibility standard of the existing online monitoring equipment, the interference mechanism of the base station antenna to the online monitoring equipment is analyzed. It is recommended to use the radio frequency radiation immunity of 10V / m as the anti-interference design limit. Combined with the antenna principle, the mathematical characterization formula of the base station antenna field source is deduced, so that a mathematical model for solving the scattering field of the electric large-size metal scatterer at any point in space under the multi-base station antenna radiation is proposed. Taking the Shandong shared iron tower as an example, the electric field strength change rule of the online monitoring equipment under the three working conditions of the tower head type, antenna power and antenna inclination is analyzed. Based on this, it is recommended to The protective spacing is set at 4 meters.