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Microwave Communication problems

  • 1. Fibers have numerical aperture (NA) in the range of 0.15 to 0.4 Fibers with higher NA value would have

  • Options
  • A. reduced losses
  • B. high bandwidth
  • C. reduced losses and low bandwidth
  • D. more losses and low bandwidth
    • Discuss
  • 2. The most commonly used magnetron is

  • Options
  • A. cylindrical
  • B. parallel plate
  • C. inclined plate
  • D. flat plate
    • Discuss
  • 3. Assertion (A): For a reciprocal microwave junction the S matrix is symmetrical.

    Reason (R): In a symmetrical matrix Sij = Sji.


  • 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 a waveguide the dielectric region is generally

  • Options
  • A. air
  • B. magnetic material
  • C. brass
  • D. mica
    • Discuss
  • 5. Which part of radio spectrum is more crowded?

  • Options
  • A. Lower frequency part
  • B. Higher frequency part
  • C. Both (a) and (b)
  • D. None of these
    • Discuss
  • 6. In the given figure the equivalent circuit of a T attenuator. If Electronics and Communication Engineering Microwave Communication: In the given figure the equivalent circuit of a T attenuator. If the condition for matched attenuator is
    Electronics and Communication Engineering Microwave Communication: In the given figure the equivalent circuit of a T attenuator. If

  • Options
  • A.
  • B.
  • C.
  • D.
    • Discuss
  • 7. In microwave circuits, a mode transducer is used to

  • Options
  • A. change mode of wave transmission
  • B. change direction of wave transmission
  • C. change polarization of wave transmission
  • D. change mode, direction or polarization wave transmission
    • Discuss
  • 8. Slotted line can be used for measurement of high frequencies

  • Options
  • A. True
  • B. False
    • Discuss
  • 9. Which of the following is not used as a microwave mixer or detector?

  • Options
  • A. PIN diode
  • B. Crystal diode
  • C. Schottky barrier diode
  • D. Backward diode
    • Discuss
  • 10. Radar principle is used in

  • Options
  • A. detection of aircraft
  • B. burglar alarms
  • C. garage door openers
  • D. all of the above
    • Discuss

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