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Microwave Communication problems

  • 1. In fibre optics the use is made of thin glass fibres for efficient transmission of light.

  • Options
  • A. True
  • B. False
    • Discuss
  • 2. Klystron amplifier is not used to amplifier very weak microwave signals due to

  • Options
  • A. low gain for weak signals
  • B. low noise for weak signals
  • C. high noise
  • D. both (a) and (b)
    • Discuss
  • 3. Which of the following modes in circular waveguides are circularly symmetric?

  • Options
  • A. TE01
  • B. TE02
  • C. both (a) and (b)
  • D. neither (a) nor (b)
    • Discuss
  • 4. The electrical requirement on wall thickness of rectangular wave guide is

  • Options
  • A. wall thickness is more than skin depth
  • B. wall thickness is less than skin depth
  • C. wall thickness is equal to skin depth
  • D. either (b) or (c)
    • Discuss
  • 5. Which mode is called dominant mode in rectangular wave guide?

  • Options
  • A. TE01
  • B. TE11
  • C. TE10
  • D. TE20
    • Discuss
  • 6. Radar reciever has high sensitivity and low noise figure

  • Options
  • A. True
  • B. False
    • Discuss
  • 7. Which of the following lines behaves as infinite line?

  • Options
  • A. a line terminated in inductance
  • B. a line terminated in capacitance
  • C. a short line
  • D. a line terminated in z0
    • Discuss
  • 8. Most electromagnetic transmission in rectangular wave-guide uses

  • Options
  • A. TE10 mode
  • B. TE01 mode
  • C. TE20 mode
  • D. TE11 mode
    • Discuss
  • 9. A line of characteristic impedance 400 ? is terminated by a resistance of 400 ?. The reflected quantities are

  • Options
  • A. zero
  • B. equal to incident quantities
  • C. half the incident quantities
  • D. double the incident quantities
    • Discuss
  • 10. VTM stands for voltage tunable magnetron.

  • Options
  • A. True
  • B. False
    • Discuss

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