 Vertical beamwidth is not wider than 15°, meaning 7.5° in each direction.Unlike antennas for commercial broadcasting - AM, FM and television for example - which must achieve line-of-sight over many miles or kilometers, there is usually a downward beam tilt or downtilt so that the base station can more effectively cover its immediate area and not cause RF interference to distant cells.The coverage area, which is determined by the projection of the radiation pattern on the ground, can be adjusted by changing the downtilt of the pattern.