Question

If the heights of transmitting and receiving antenna are equal then LOS distance is ___ in km.

(a) 8.24√h

(b) 4.82√h

(c) 4.12√h

(d) 2.06√h

The question was posed to me in a job interview.

Question is from Space Wave Propagation topic in section Space Wave Propagation of Antennas

Answer 1

Right answer is (a) 8.24√h

For explanation I would say: Given heights of transmitting and receiving antenna are equal ht = hr = h

Expression for the LOS distance is \(d = 4.12(\sqrt{h_t}+\sqrt{h_r})\) in km.

⇨ D=4.12 (2√h) = 8.24√h.