There are 3 main propagation mechanisms in mobile communication systems: 1. Reflection occurs when signals bounce off surfaces like buildings and earth. 2. Diffraction is when signals bend around obstacles like hills and buildings. 3. Scattering is when signals are deflected in many directions by small obstacles like trees and signs. These 3 mechanisms impact the received power and must be considered in propagation models.

1. PROPAGATION MECHANISMS 3 TYPES

5. Multipath Propagation

10. Diffraction Geometry

12. Graphical representation

13. Lee’s Approximate

20. 3 PROPAGATION MECHANISMS THE END