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MCQ Practice Question

Antenna & Wave Propagation Free-Space Path Loss

In free space, path loss increases by approximately how much when distance is doubled while frequency remains unchanged?

A3 dB
B6 dB
C10 dB
D20 dB

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Correct Answer: B. 6 dB

Explanation: Free-space received power varies as 1/R², so doubling distance produces about 10log10(4)=6.02 dB additional path loss.

Reference: Standard antenna and wave propagation: free-space path loss

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