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Antenna & Wave PropagationRadio Horizon

Using the same radio-horizon approximation, if transmitter height is 100 m and receiver height is 25 m, the approximate radio line-of-sight range is?

  • A41.2 km
  • B51.5 km
  • C61.8 km
  • D82.4 km
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Correct Answer: C. 61.8 km
Explanation: d≈4.12(sqrt100+sqrt25)=4.12(10+5)=61.8 km.
Reference: Standard antenna and wave propagation: radio horizon
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