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

  • 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

  • Correct Answer
  • 1 and 3 only 

    • Microwave Communication problems

    Search Results

    • 1. 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
    • 2. Power monitor and reflectometer use the principle of

    • Options
    • A. directional coupler
    • B. klystron amplifier
    • C. Gunn diode
    • D. TWT
      • Discuss
    • 3. 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
      • Discuss
    • 4. 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
    • 5. The main advantage of using micro waves for communications is

    • Options
    • A. large bandwidth
    • B. small bandwidth
    • C. low power
    • D. high power
      • Discuss
    • 6. 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
    • 7. 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
    • 8. Consider the following statements

      1. Fading of signals is generally greatest near radio horizon.
      2. Fading of signals is generally greatest in shadow zone.
      3. Fading is small when a good optical path is present.
      Which of the above statements are correct?

    • Options
    • A. 1, 2 and 3
    • B. 1 and 2 only
    • C. 1 and 3 only
    • D. 2 and 3 only
      • Discuss
    • 9. A line of length less than and open 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
    • 10. Ridge waveguide is essentially a form of capacitively loaded guide.

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

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