Radio masts and towers are, typically, tall structures designed to support antennas (also known as aerials) for telecommunications and broadcasting, including television. There are two main types: guyed and self-supporting structures. They are among the tallest man-made structures.

Masts are often named after the broadcasting organizations that originally built them or currently use them.

In the case of a mast radiator or radiating tower, the whole mast or tower is itself the transmitting antenna.

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