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On which of the following factors does the LOS distance depends?

(a) Height of receiving antenna alone

(b) Height of transmitting antenna alone

(c) Only on height of transmitting and receiving antenna

(d) On height of transmitting and receiving antenna and effective earths radius factor k

I had been asked this question during an interview.

Query is from Space Wave Propagation in portion Space Wave Propagation of Antennas

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Right option is (d) On height of transmitting and receiving antenna and effective earths radius factor k

To explain: LOS (Line of sight) is the distance covered by a direct space wave from transmitting to receiving antenna. The LS distance depends on the effective earth’s radius factor k and height of the transmitting and receiving antennas. The LOS distance is given by \(d = 4.12(\sqrt{h_t}+\sqrt{h_r})\) in km.

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