Equivalent Rain Volume Parameters to Describe Wave Propagation

Considering theoretical analyses the equivalent parameters of rain volume (such as equivalent relative permittivity, equivalent conductivity and equivalent phase shift) have been derived. That has allowed the utilization of homogenous volumes, which could behave at the same manner as studied non-homogenous rain volumes from electromagnetic wave propagation point of view. These equivalent parameters depend on the other parameter - the rain intensity. Considering the analyses the MATLAB code for equivalent parameters of rain volume has been done. Graphs showing real and imaginary parts of relative permittivity of rain volumes and dependences of frequencies and rain intensities have been plotted. The frequency dependence has been chosen for 4-8 GHz range according to performed measurements of through-wall electromagnetic signal propagations. That is shown in the separate chapter. The rain intensities have been chosen in 1 mm/h to 200 mm/h range. That correspond all possible rain intensities in the Czech Republic. Higher values (100 - 200 mm/h) have been only considered to evaluate the effect of the water amount per volume on the resultant equivalent parameters of rain volume.