A guyed tower or mast is a tall structure that is supported by a system of guy wires or cables. It is commonly used in telecommunications, broadcasting, and other industries to support antennas, communication equipment, and various instruments. There are two main types: guyed and self-supporting structures. Guyed towers should. In the relentless pursuit of expansive wireless coverage—for broadcasting, long-haul microwave links, or next-generation mobile networks—height is the ultimate asset.