Work out coaxial cable loss instantly with clear inputs, formula shown and shareable results.
Cable loss is proportional to length, so scale the per-100-metre figure directly. Loss rises roughly with the square root of frequency because of skin effect, so the same cable that loses 3 dB per 100 m at 100 MHz loses around 10 dB at 1 GHz.
Cable loss
loss(dB) = loss per 100 m x length / 100; power ratio = 10^(-loss/10)
Skin effect confines current to a thinner surface layer, raising effective resistance as the square root of frequency, plus dielectric losses that rise linearly.
Yes, and it is worse: the loss adds directly to the system noise figure, degrading sensitivity as well as reducing signal.