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Fresnel Zone MCQs

Practice Fresnel Zone MCQs with four options, answers and explanations for focused Electronics & Telecommunication Engineering revision.

Question 1
Antenna & Wave PropagationFresnel Zone

The first Fresnel zone is important in a point-to-point radio link because excessive obstruction within it can cause?

  • AAdditional diffraction loss
  • BAutomatic gain increase
  • CZero path loss
  • DPerfect impedance matching
Report an error
Correct Answer: A. Additional diffraction loss
Explanation: Keeping much of the first Fresnel zone clear helps minimize diffraction loss and destructive interference.
Reference: Standard antenna and wave propagation: fresnel zone
Question 3
Antenna & Wave PropagationFresnel Zone

For good practical line-of-sight link clearance, a commonly used planning guideline is to keep at least about what fraction of the first Fresnel zone unobstructed?

  • A20%
  • B40%
  • C60%
  • D100% in every possible situation
Report an error
Correct Answer: C. 60%
Explanation: A widely used engineering guideline is about 60% first-Fresnel-zone clearance to limit diffraction loss.
Reference: Standard antenna and wave propagation: fresnel zone