Question

If the whole earth is to be connected by LOS communication using space waves (no restriction of antenna size or tower height), what is the minimum number of antennas required? Calculate the tower height of these antennas in terms of earths radius?

Answer 1

Since space wave frequency is used, l << hT, hence only tower height is taken to consideration.

In three dimensions, 6 antenna towers of h_r = R would do.