Leaves on a tree contain water which weakens the microwave signal used by satellites. You will need a mounting location where leaves won't grow and block the signal. How mature is the tree? It will continue to develop until it dies so it is not as stable as you think. You are looking at a satellite about the size of a van 22,300 miles out from the Equater, a 1/16" movement can lose the signal.YES it can be mounted in a tree if the right circumstances are there but it is not recommended.