"Bob Bob" wrote
My first thought would be that a collinear with such a high gain would
have a very narrow vertical beamwidth. ie a small angle off the vertical
where mounted would have the remote site some dB down off the main lobe.
_____________

As a point of reference, commercial UHF broadcast TV transmit antennas can
have elevation gains of 36X or more (~17.7 dBi); still they produce their
predicted signal strengths for their ERP and height above ground over their
line-of-sight coverage areas.

RF