When an installation of a wireless point to point bridge is designed and
installed, it is generally thought that line of sight is required, but
there is also a requirement for clearance of what is known as the Fresnel
Zone. Mount the antennas 4-8 ft. above roof/trees between the
locations. 

 

 

For more information about Fresnel Zone, please go to this link: https://en.wikipedia.org/wiki/Fresnel_zone