Suppose that a line-of-sight radio path has a path loss of 50 dB at 1 GHz.
(a) What will be the free-space path loss, in dB at 28 GHz?
(b) What accounts for the increase in loss?
(c) Are there any factors that are likely to make the path loss at 28 GHz higher than that calculated in part (b)? If so, what are they?