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Home ‣ Electronics and Communication Engineering ‣ Microwave Communication Comments
  • Question

  • Assertion (A): An artificial transmission line can be used as a pulse generator.

    Reason (R): A pulse function is used very frequently in network analysis.


  • 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

  • Correct Answer
  • Both A and R are correct but R is not correct explanation of A 

    • Microwave Communication problems

    Search Results

    • 1. TE10 mode of propagation of electromagnetic energy in waveguides can be thought of as

    • Options
    • A. three TEM waves travelling along length of wave-guide
    • B. One TEM wave travelling along length of wave guide and one TEM wave propagation in the transverse plane
    • C. One TEM wave travelling along the length of wave guide and two TEM waves
    • D. none of the above
      • Discuss
    • 2. The main advantage of using micro waves for communications is

    • Options
    • A. large bandwidth
    • B. small bandwidth
    • C. low power
    • D. high power
      • Discuss
    • 3. If QL is loaded Q, QE is external Q and QU is unloaded Q of a microwave resonator, then

    • Options
    • A.
    • B.
    • C.
    • D. QL = QE + QU
      • Discuss
    • 4. In a cable with ?r = 4, the wave velocity is

    • Options
    • A. 3 x 108 m/s
    • B. 0.75 x 108 m/s
    • C. 1.5 x 108 m/s
    • D. 108 m/s
      • Discuss
    • 5. The use of coaxial microwave line should be restricted to frequencies

    • Options
    • A. below cut off frequency of TE11 mode
    • B. above cut off frequency of TE11 mode
    • C. at frequencies much lower than cut off frequency of TE11 mode
    • D. at frequencies much higher than cut off frequency of TE11 mode
      • Discuss
    • 6. Power monitor and reflectometer use the principle of

    • Options
    • A. directional coupler
    • B. klystron amplifier
    • C. Gunn diode
    • D. TWT
      • Discuss
    • 7. Dielectric constant and conductivity of rocky soil and flat sandy soil are around

    • Options
    • A. 10 and 20 mho/cm respectively
    • B. 20 and 10 mho/cm respectively
    • C. 2 and 5 mho/cm respectively
    • D. 0.5 and 2 mho/cm respectively
      • Discuss
    • 8. Consider the following statements, SWR of a transmission line is infinite when the load is

      1. a short circuit
      2. a complex impedance
      3. an open circuit
      4. a pure reactance
      Which of the above statements are correct?

    • Options
    • A. 1 and 3 only
    • B. 1, 2, 3
    • C. 2, 3, 4
    • D. 1, 2, 4
      • Discuss
    • 9. Compared to coaxial lines, the advantages of wave guides are

    • Options
    • A. higher power handling capacity
    • B. lower loss per unit length
    • C. cheaper and simple mechanical structure
    • D. all of the above
      • Discuss
    • 10. A rectangular waveguide has width a. Then at the cutoff frequency (with corresponding wave length ?c)

    • Options
    • A.
    • B. a = ?c
    • C.
    • D. a = 2?c
      • Discuss

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