How does the attenuation of coaxial cable change with increasing frequency?
Attenuation is independent of frequency
Attenuation increases✓Правильный ответ
Attenuation decreases
Attenuation follows Marconi’s Law of Attenuation
Объяснение
Attenuation rises with frequency because skin effect confines the RF current to an ever thinner surface layer, raising the effective conductor resistance, and because dielectric losses also grow with frequency.