Question

The free space model predicts that received signal decays as a function of _________

(a) Gain of transmitter antenna

(b) T-R separation

(c) Power of transmitter antenna

(d) Effective aperture of the antenna

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Asked question is from Free Space Propagation Model in section Mobile Radio Propagation: Large – Scale Path Loss of Wireless/Mobile

Answer 1

Correct answer is (b) T-R separation

Easiest explanation: As with most large scale radio wave propagation models, the free space model predicts that received signal decays as a function of the T-R separation distance raised to some power. Often it is given as a function of negative square root of the distance.