If your location is frequently affected by icing conditions, which type of transmission line would be the most suitable?

Coaxial cable is the most suitable transmission line for areas prone to icing and severe weather. In a coaxial cable, the electromagnetic field is entirely contained within the outer shield, and the sensitive dielectric spacing between the inner and outer conductors is protected by the outer jacket. Accumulations of ice or water on the outside of the cable have virtually no effect on its impedance or performance. In contrast, open-wire line, twin-lead, and window line (parallel-conductor lines) rely on the physical air space between their two unshielded conductors to maintain their characteristic impedance. When ice, snow, or water bridges the gap between these parallel wires, it dramatically changes the dielectric constant of the space between them. This significantly alters the impedance of the line, causing high SWR and severe detuning of the antenna system.