Atmospheric effects due to different particle shapes on propagation

It is known that the attenuation of electromagnetic waves by hydrometeors in the atmosphere may result from both absorption and scattering, depending on the size and shapes. When the particles are small with respect to wavelength, attenuation is considerably simplified for small particles. In this study, the attenuation of electromagnetic waves at millimeter wavelengths has been calculated for isotropic dielectric geometric shapes such as discs, rods, and spheres. The modified Rayleigh-Gans approach is applied for calculation of attenuation due to geometric shapes whose physical size are small compared to wavelength