Beam tilt
![](/Images/godic/202412/23/136_to_174_MHz_base_station_antennas2920.jpg")
![Horizontal and vertical radiation patterns, the latter with a pronounced downward beam tilt](/Images/godic/202412/23/Sector_antenna_radiation_pattern2920.png")
Beam tilt is used in radio to aim the main lobe of the vertical plane radiation pattern of an antenna below (or above) the horizontal plane.
The simplest way is mechanical beam tilt, where the antenna is physically mounted in such a manner as to lower the angle of the signal on one side. However, this also raises it on the other side, making it useful in only very limited situations.