Distance between TX and RX antenna = Ö{( ht - ht)2 + d2}
Distance between TX and mirrored RX antenna =
Ö{( ht + ht)2 + d2}}
The phase difference D is
At large a distance, d >> 5ht hr,
so, the received signal power is
Two-ray model (space wave approximation)
The reflection coefficient approaches Rc ® -1 for
For large distances d ® ¥: D ® 0 and Rc ® -1.
In this case, LOS and ground-reflected
wave cancel!!