Research on the distribution of magnetic field around communication tower when struck by lightning

The communication tower leads to a regional increasing lightning density to a certain extent, which brings about more serious threat of lightning electromagnetic interference and lightning invasion. Since the malfunction or permanent damage of electronic equipment caused by harsh electromagnetic environment is mainly attributed to magnetic field, the magnetic field around the tower is analyzed in detail in this paper. A ten meters high communication station tower model was established by CST studio. Then, the transient electromagnetic response when the tower is struck by lightning directly and the space distribution of magnetic field around the tower were analyzed. The results show that the magnetic fields inside tower are much smaller than outside. And the amplitudes of magnetic fields are not monotonically changing with height.