Question

What is the meaning of attenuation constant in em wave?

Answer 1

The real part of the propagationconstant is the attenuation constantand is denoted by α (alpha). It causes signal amplitude to decrease along a transmission line. The natural units of the attenuation constant are Nepers/meter, but we often convert to dB/meter in microwave engineering

Answer 2

In telecommunications, the term attenuation constant, also called attenuation parameter orattenuation coefficient, is the attenuation of an electromagnetic wave propagating through a medium per unit distance from the source. It is the real part of the propagation constant and is measured in nepers per metre