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Yagi-Uda Antenna MCQs

Practice Yagi-Uda Antenna MCQs with four options, answers and explanations for focused Electronics & Telecommunication Engineering revision.

Question 1
Antenna & Wave PropagationYagi-Uda Antenna

A Yagi-Uda antenna normally consists of a driven element together with?

  • AA reflector and one or more directors
  • BOnly a parabolic dish
  • COnly a horn aperture
  • DTwo identical ground planes with no parasitic elements
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Correct Answer: A. A reflector and one or more directors
Explanation: A typical Yagi-Uda uses one driven element, usually a dipole, plus a reflector and one or more parasitic directors.
Reference: Standard antenna and wave propagation: yagi-uda antenna
Question 2
Antenna & Wave PropagationYagi-Uda Antenna

In a conventional Yagi-Uda antenna, the reflector is generally placed?

  • ABehind the driven element relative to the main radiation direction
  • BIn front of all directors
  • CAt the exact same position as the driven element
  • DOnly inside the feed cable
Report an error
Correct Answer: A. Behind the driven element relative to the main radiation direction
Explanation: The reflector is placed behind the driven element and helps reinforce radiation toward the directors.
Reference: Standard antenna and wave propagation: yagi-uda antenna
Question 3
Antenna & Wave PropagationYagi-Uda Antenna

Adding suitably designed directors to a Yagi-Uda antenna generally tends to?

  • AIncrease directivity in the forward direction
  • BMake it perfectly isotropic
  • CEliminate all impedance
  • DForce radiation only backward
Report an error
Correct Answer: A. Increase directivity in the forward direction
Explanation: Directors concentrate radiation in the forward direction and can increase Yagi-Uda directivity.
Reference: Standard antenna and wave propagation: yagi-uda antenna