Antennas And Microwave Engineering Set 8

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This set of Antennas and Microwave Engineering Multiple Choice Questions & Answers (MCQs) focuses on Antennas And Microwave Engineering Set 8

Q1 | Any device with negative impedance as its characteristic property can be called:
  • energy source
  • energy sink
  • oscillator
  • none of the mentioned
Q2 | In a microwave oscillator, a load of 50+50j is connected across a negative resistance device of impedance -50-50j. Steady state oscillation is not achieved in the oscillator.
  • true
  • false
Q3 | For achieving steady state oscillation, the condition to be satisfied in terms of reflection coefficients is:
  • Гin=Гl
  • Гin=-Гl
  • Гin=1/Гl
  • none of the mentioned
Q4 | To achieve stable oscillation, Zin + ZL=0 is the only necessary and sufficient condition to be satisfied by the microwave oscillator.
  • true
  • false
Q5 | In transistor oscillators, the requirement of a negative resistance device is satisfied using a varactor diode.
  • true
  • false
Q6 | In transistor oscillators, FET and BJT are used. Instability is achieved by:
  • giving a negative feedback
  • giving a positive feedback
  • using a tank circuit
  • none of the mentioned