Antenna and Microwave Engineering MCQs with answers Page - 14

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A

Admin • 802.91K Points
Coach

Q. Bandwidth of balanced amplifier can be an octave or more, but is limited by the bandwidth of the coupler.

  • (A) true
  • (B) false
  • (C) ---
  • (D) ---

A

Admin • 802.91K Points
Coach

Q. Coupler that is mostly used in balanced amplifiers to achieve the required performance is:

  • (A) branch line coupler
  • (B) wilkinson coupler
  • (C) lange coupler
  • (D) waveguide coupler

A

Admin • 802.91K Points
Coach

Q. Distributed amplifiers offer very high

  • (A) gain
  • (B) bandwidth
  • (C) attenuation
  • (D) none of the mentioned

A

Admin • 802.91K Points
Coach

Q. In distributed amplifiers, all the FET stages in the amplifier are connected in series to one another.

  • (A) true
  • (B) false
  • (C) ---
  • (D) ---

A

Admin • 802.91K Points
Coach

Q. uses balanced input and output, meaning that there are 2 signal lines, with opposite polarity at each port.

  • (A) differential amplifier
  • (B) distributed amplifier
  • (C) balanced amplifier
  • (D) none of the mentioned

A

Admin • 802.91K Points
Coach

Q. A major advantage of differential amplifiers is:

  • (A) high gain
  • (B) low input impedance
  • (C) higher output voltage swing
  • (D) none of the mentioned

A

Admin • 802.91K Points
Coach

Q. Along with a differential amplifier, 1800 hybrid is used both at the input and output.

  • (A) true
  • (B) false
  • (C) ---
  • (D) ---

A

Admin • 802.91K Points
Coach

Q. is a non linear circuit that converts DC power to an AC waveform of desired frequency based on the oscillator design.

  • (A) attenuator
  • (B) amplifier
  • (C) oscillator
  • (D) none of the mentioned

A

Admin • 802.91K Points
Coach

Q. The transfer function of an RF oscillator is given by:

  • (A) a/ (1-ah (ω))
  • (B) a/ (1+ah (ω))
  • (C) a/ (-1+ah (ω))
  • (D) 1/ (1-ah (ω))

A

Admin • 802.91K Points
Coach

Q. The criterion on which oscillations are produced in the oscillator circuit is called:

  • (A) shannon’s criteria
  • (B) barkhausen criteria
  • (C) colpitts criteria
  • (D) none of the mentioned

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