naqvi wrote
i have read ur response very carefully and its perfect 142dB Path
loss but problem is that what's the Rx height if i suppose Tx and Rx
install on the same height then my Rx height after the earth buldge
and knife e calculation i have got 100m Rx its totally wrong
because if i increase that (100m) Rx height its mean get the problem
at fresnel Zone
_________________

Suggest that you print my graphic, and look for different heights of the
transmit and receive antennas that still clear the 80 meter hill by using a
straight edge that always crosses the location of the hill at the elevations
shown in my plot.

It is best to provide more path clearance at the 80 meter hill than I
showed, because some K-factor variations could steer that 10 GHz beam into
that hill, and cause loss of a usable signal for the receiver.

Also remember that this plot was done over a smooth earth. The true
elevations at the endpoints of the path and at the hill could be
considerably different than I showed.

RF