Radio waves attenuation model for a ray approximation

We considered the modeling problem of radio wave propagation processes indoors. We generalized all physical phenomena influencing the result. We also suggested the model for the radio-wave attenuation calculation and studied a radiowave attenuation into lossy dielectric. As a result, we obtained the analytical expressions that makes it possible to calculate a radio wavefront (angle of refraction), in case of its passing from ideal to lossy dielectric and with the attenuation coefficient caused by absorption. Besides, we output the asymptotic formula for the definition of an angle of refraction and calculated the dependences of an angle of refraction and an attenuation coefficient on an angle of incidence for some building materials.