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Microwave Communication problems

  • 1. Which one of the following is also called 'rat race'?

  • Options
  • A. E plane tee
  • B. H plane tee
  • C. Magic tee
  • D. Hybrid ring
    • Discuss
  • 2. A waveguide connected to a circularly polarized antenna must be able to efficiently propagate both vertically and horizontally polarised waves.

  • Options
  • A. True
  • B. False
    • Discuss
  • 3. Assertion (A): A line of length slightly more than Electronics and Communication Engineering Microwave Communication: Assertion (A): A line of length slightly more than and open circuited at far end is equivalent to an inductive reactance.

    Reason (R): A line of length slightly more than Electronics and Communication Engineering Microwave Communication: Assertion (A): A line of length slightly more than and short circuited at far end behaves as a capacitive reactance.


  • Options
  • A. Both A and R are correct and R is correct explanation of A
  • B. Both A and R are correct but R is not correct explanation of A
  • C. A is correct but R is wrong
  • D. A is wrong but R is correct
    • Discuss
  • 4. In TE mode of waveguide Ez = 0

  • Options
  • A. True
  • B. False
    • Discuss
  • 5. The speed at which axial electric field due to signal advances in a TWT is equal to

  • Options
  • A. speed of light
  • B. (speed of light) (helix pitch helix circumference)
  • C. (speed of light) (helix circumference helix pitch)
  • D. (speed of light) (helix pitch) (helix circumference)
    • Discuss
  • 6. A line of length slightly less than Electronics and Communication Engineering Microwave Communication: A line of length slightly less than and short circuited at far end behaves as

  • Options
  • A. inductance L
  • B. capacitance C
  • C. L and C in series
  • D. L and C in parallel
    • Discuss
  • 7. In directional coupler of the given figure, the terms |S14| and |S23| of scattering matrix are nearly
    Electronics and Communication Engineering Microwave Communication: In directional coupler of the given figure, the terms |S14| and |S23

  • Options
  • A. 1 each
  • B. 0.5 each
  • C. 0.1 each
  • D. 1 and 0.5 respectively
    • Discuss
  • 8. Depth of penetration does not depend on frequency.

  • Options
  • A. True
  • B. False
    • Discuss
  • 9. Assertion (A): Slotted line is frequently used for microwave measurements.

    Reason (R): The unknown impedance is mounted at the end of slotted line.


  • Options
  • A. Both A and R are correct and R is correct explanation of A
  • B. Both A and R are correct but R is not correct explanation of A
  • C. A is correct but R is wrong
  • D. A is wrong but R is correct
    • Discuss
  • 10. Assertion (A): Inter-digitated geometry is widely used for microwave transistors.

    Reason (R): Tuning at input and output of transistor uses MOS chip capacitors.


  • Options
  • A. Both A and R are correct and R is correct explanation of A
  • B. Both A and R are correct but R is not correct explanation of A
  • C. A is correct but R is wrong
  • D. A is wrong but R is correct
    • Discuss

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