What happens as the frequency of a signal in coaxial cable is increased?
The characteristic impedance decreases
The loss decreases
The characteristic impedance increases
The loss increases✓Bonne réponse
Explication
Coaxial loss comes mainly from conductor resistance, which rises with frequency because skin effect confines current to a thinner surface layer, and from dielectric losses that also rise with frequency. The characteristic impedance is set by the cable's geometry and stays essentially constant.