| Nine representative base stations in Nantong have been selected for field investigating into the distribution of horizontal ground electromagnetic radiation. The result showed the intensity of electromagnetic radiation varied with the way the antenna being set up. The intensity of ground towers was generally lower than that of roof towers. Within the scope of 50 meters, the power density decreased in turn from roof derrick, roof tic tac toe tower, roof angle iron tower, roof view tower, roof bunch antenna, roof bracing wire tower, roof quadrangle tower, roof embellished antenna to ground tower. The maximum ground electromagnetic radiation intensity of all the towers mentioned above could be detected in 20~30 meters away from the base station. Due to the factors of height and downward inclination angle, the maximum intensity of roof embellished antenna and roof angle iron tower could be detected in 60 and 70 meters away, respectively, which were beyond the normal inspection point 50 meters. |
