Why are coaxial cables considered impractical for use in radar systems?

Coaxial cables are considered impractical for use in radar systems primarily because they are inefficient at the high frequencies commonly utilized in radar technology. Radar systems operate in the microwave frequency range, which can lead to significant signal loss due to the characteristics of coaxial cables. At these frequencies, factors such as dielectric losses, skin effect, and radiation losses can greatly impede the effective transmission of radar signals. As a result, the performance of radar systems can be degraded, making coaxial cables an unsuitable choice for such applications.

In contrast, other types of transmission lines, such as waveguides, are preferred for radar use because they maintain signal integrity better at these elevated frequencies, ensuring reliable performance in radar operations.