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摘要
To study the coupling effect of an antenna near the lightning channel when the wireless base station lightning rod is attacked by lightning, the simulation models of lightning channel-communication tower and dipole antenna working on the communication frequency of 900 MHz are constructed in this paper based on the CST Studio Suite and FEKO. The results of S-2,S-1 calculated by the two simulation software are compared to verify the reliability of the models, then the coupling characteristics of the 900 MHz dipole antenna is discussed in terms of the heights of tower, the heights of the antenna, the horizontal distances of the antenna from the tower, and the polarization directions of the antenna. We find that the induced voltage of the antenna in vertical polarization is much larger than that in horizontal polarization. The further the antenna from the base station tower top, the smaller the induced voltage. When the antenna is within the range of 5 m below the tower top with set heights of 30, 25, 20, and 15 m, the induced voltage of the antenna decreases greatly in response to the reduction of antenna's height, and the closer the antenna to the tower, the greater the change. While outside the range, the induced voltage decreases slowly as the antenna's height reduces, until it almost remains unchanged, and the effect of antenna's horizontal distance from the tower on the induced voltage is not obvious. The induced peak voltage of the antenna is almost linearly decreased with its polarization rotation from vertical to horizontal polarization.
- 出版日期2018-12
- 单位中国科学院大气物理研究所; 成都信息工程大学
