Question

Radio horizon is less than LOS distance.

(a) True

(b) False

The question was posed to me in an internship interview.

My doubt is from Space Wave Propagation in division Space Wave Propagation of Antennas

Answer 1

Right answer is (a) True

Easy explanation: Expression for radio horizon in km is \(d = 3.56(\sqrt{h_t}+\sqrt{h_r}),\) Expression for the LOS distance is \(d = 4.12(\sqrt{h_t}+\sqrt{h_r})\) in km. Under same height conditions, radio horizon is less than LOS. But at effective radius factor k=1, both will be equal.