Antenna and Microwave Engineering MCQs with answers Page - 5

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A

Admin • 802.91K Points
Coach

Q. Antennas are used

  • (A) as transducer
  • (B) to focus
  • (C) as transducer & to focus
  • (D) none of the mentioned

A

Admin • 802.91K Points
Coach

Q. Mechanism contributing to a reduction in efficiency is called as

  • (A) amplitude tapering
  • (B) blockage
  • (C) edge diffraction
  • (D) all of the mentioned

A

Admin • 802.91K Points
Coach

Q. Space loss occurs due to a decrease in

  • (A) electric field strength
  • (B) efficiency
  • (C) phase
  • (D) signal power

A

Admin • 802.91K Points
Coach

Q. Antenna’s efficiency is given by the ratio of

  • (A) effective aperture to physical aperture
  • (B) physical aperture to effective aperture
  • (C) signal power to noise power
  • (D) losses

A

Admin • 802.91K Points
Coach

Q. Effective radiated power of an isotropic radiator can be given as a product of

  • (A) radiated power and received power
  • (B) effective area and physical area
  • (C) transmitted power and transmitting gain
  • (D) receiving power and receiving gain

A

Admin • 802.91K Points
Coach

Q. A dipole antenna is also called as?

  • (A) marconi antenna
  • (B) yagi antenna
  • (C) bidirectional antenna
  • (D) hertz antenna

A

Admin • 802.91K Points
Coach

Q. The impedance at the center of the antenna is known as?

  • (A) characteristic impedance
  • (B) radiation resistance
  • (C) transmission impedance
  • (D) recovery resistance

A

Admin • 802.91K Points
Coach

Q. What happens when the radiation resistance of the antenna matches the characteristic impedance of the transmission line?

  • (A) no transmission occurs
  • (B) no reception occurs
  • (C) swr is maximum
  • (D) swr is minimum

A

Admin • 802.91K Points
Coach

Q. The type of dipole antenna that has a higher band width is called as?

  • (A) conical antenna
  • (B) yagi antenna
  • (C) helical antenna
  • (D) marconi antenna

A

Admin • 802.91K Points
Coach

Q. The radiation pattern of a half-wave dipole has the shape of a

  • (A) doughnut
  • (B) sphere
  • (C) hemisphere
  • (D) circular

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