thin structure without the sheer strength to stand unsupported, that uses attached guy lines for stability. They may be mounted on the ground or on top of buildings. Typical masts are of steel lattice or tubular steel construction. Masts tend to be cheaper to build but require an extended area surrounding them to accommodate the guy wires.

; A tower: is a self-supporting structure, possibly also placed on a rooftop, that accomplishes the same purpose of raising actual radiating antennas to a functional