Why is coaxial cable preferred for amateur radio antenna systems?

Coaxial cable is preferred for amateur radio antenna systems primarily due to its ease of use and minimal special installation requirements. Its design, which consists of a central conductor, insulating layer, and a conductive shield, allows for straightforward installation and handling. This structure protects the signal from external interference and reduces the risk of signal loss compared to other types of feedlines.

Additionally, coaxial cable is less prone to issues related to moisture and physical damage, as the outer layer helps shield the inner conductor. This robust design and user-friendly nature make it an ideal choice for many amateur radio operators, particularly those who may not have extensive installation experience or equipment.

While coaxial cable does provide good performance in terms of power handling and attenuation, those factors vary based on specific types of coax and are not universally superior across all feedline types. The overall combination of practicality, ease of installation, and reliability with coaxial cable aligns well with the needs of amateur radio enthusiasts.