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Antenna & Wave PropagationMUF

If the critical frequency is 5 MHz and the secant of the incidence angle is 2, the approximate MUF is?

  • A2.5 MHz
  • B5 MHz
  • C10 MHz
  • D25 MHz
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Correct Answer: C. 10 MHz
Explanation: Using MUF=fc sec i gives 5×2=10 MHz.
Reference: Standard antenna and wave propagation: muf
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