Question

Expression for the LOS distance is _____ (km)

(a) \(4.12(\sqrt{h_t}+\sqrt{h_r})\)

(b) \(4.12(\sqrt{h_t}-\sqrt{h_r})\)

(c) \(3.56(\sqrt{h_t}+\sqrt{h_r})\)

(d) \(3.56(\sqrt{h_t}-\sqrt{h_r})\)

I got this question in an online quiz.

Origin of the question is Space Wave Propagation in portion Space Wave Propagation of Antennas

Answer 1

The correct answer is (a) \(4.12(\sqrt{h_t}+\sqrt{h_r})\)

The explanation is: LOS is thedistance covered by a direct space wave from transmitting to receiving antenna.Expression for the LOS distance is \(d = 4.12(\sqrt{h_t}+\sqrt{h_r})\) in km.

Expression for the Radio horizon distance is \(d =3.56(\sqrt{h_t}+\sqrt{h_r})\) in km.