I was studying EM wave propagation in lossy dielectrics and came across two seemingly conflicting parameters of a medium. The loss tangent is defined as:
which clearly is inversely proportional to the frequency of the wave. So for a high frequency wave, the conducting medium would behave as an insulator to the propagation, and the power loss would be low.
Whereas the wave attenuation constant is defined as:
α= √(π* f* μ* σ);
which displays proportionality with the square root of the frequency. So at a high frequency, the wave would be greatly attenuated i.e. lose amplitude with propagation through the medium. But isn't this contradicting with the concept of low loss tangent thus low power loss? Am I missing something in the relation between attenuation and power loss?