Mast radiator
![A typical mast radiator and](/Images/godic/202501/14/2008-07-28_Mast_radiator4414.jpg")
![To ensure that the mast acts as a single conductor, the separate structural sections of the mast are connected electrically by copper jumpers.](/Images/godic/202501/14/Radio_antenna_mast_bonding_strips4414.JPG")
![Base feed: Radio frequency power is fed to the mast by a wire attached to it, which comes from an antenna tuning unit inside the](/Images/godic/202501/14/Base_feed.spliced4414.jpg")
![The Blosenbergturm in Beromünster, Switzerland - a radiating tower insulated against ground](/Images/godic/202501/14/Blosenbergturm4414.jpg")
A mast radiator (or 'radiating tower') is a radio mast or tower in which the entire structure functions as an antenna. This design, developed around 1930, is commonly used for transmitting antennas operating at low frequencies, in the VLF, LF and MF ranges, in particular those used for AM broadcasting. The metal mast is electrically connected to the transmitter. Its base is usually mounted on a nonconductive support to insulate it from the ground. A mast radiator is a form of monopole antenna.