Free space & atmospheric attenuation is defined by the loss the signal undergoes traveling through the atmosphere.
Changes in air density and absorption by atmospheric particles.
Reflections:
Reflections can occur as the microwave signal traverses a body of water or fog bank; cause multipath conditions.
Diffraction:
Diffraction is the result of variations in the terrain the signal crosses.
Rain Attenuation:
Raindrop absorption or scattering of the microwave signal can cause signal loss in transmissions.
Skin Affect:
Skin Affect is the concept that high frequency energy travels only on the outside skin of a conductor and does not penetrate into it any great distance.
Skin Affect determines the properties of microwave signals.
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