UHF Mountain Propagation: Measurements and Modelling

The White Mountains in New Hampshire provide a location where UHF non-line of sight (NLOS) paths become important. Because line of sight (LOS) paths are often blocked, reflections from adjacent tree covered slopes, visible to both transmitter and receiver, provide a bistatic propagation path with sufficient intensity. The question of the reflection mechanism will be discussed using broad band measurements and forest models.