Electromagnetic Interference of Base Station Antenna to On-line Monitoring Equipment on Shared Tower and Protection [共享铁塔基站天线对在线监测设备的电磁干扰及防护]

作者：Tang B.^*; Zhang N.; Qi D.; Liu X.; Chen B.

来源：High Voltage Engineering, 2020, 46(12): 4365-4375.

DOI：10.13336/j.1003-6520.hve.20191588

• Base station antenna
• On-line monitoring equipment
• Passive interference
• Protection distance
• Shared tower

A shared tower integrates power and communication equipment, and its new base station antenna is erected close to the online monitoring equipment for original transmission lines on the tower, which will inevitably produce electromagnetic interference to the online monitoring equipment. According to the EMC standard of existing on-line monitoring equipment, the interference mechanism of base station antenna to on-line monitoring equipment is analyzed, and it is suggested to take the immunity of RF radiation 10 V/m as the design limit of anti-interference. Based on the principle of antenna, a mathematical expression of the field source of base station antenna is derived, and a mathematical model for solving the scattering field of electrically large metal scatterer at any point in space under the radiation of multi-base-station antenna is proposed. The PO-MoM hybrid algorithm is used to solve the mathematical model, which is verified by anechoic chamber experiments. The results show that the global maximum relative deviation of the mathematical model increases with the increase of frequency, which is 8.33% at 2 600 MHz. Moreover, a Shandong shared tower is taken as an example to analyze the variation rule of electric field intensity at the on-line monitoring equipment under three working conditions of tower head type, antenna power, and antenna inclination. Based on this, it is suggested that the protection distance between the antenna and on-line monitoring equipment be set as 4 m.

• 单位
  三峡大学