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

  • Which of the following terminations makes the input impedance of a line equal to characteristic impedance Z0?


  • Options
  • A. line open circuited at far end
  • B. line terminated in Z0
  • C. line short circuited at far end
  • D. line terminated in inductance

  • Correct Answer
  • line terminated in Z0 

    Explanation
    If ZL is load impedance and Z0 is characteristic impedance.

    Input impedance =Which of the following terminations makes the input impedance of a line equal to characteristic impe. If ZL = Z0 the input impedance = Z0.

    Microwave Communication problems

    Search Results

    • 1. The correct sequence of parts in klystron amplifier are

    • Options
    • A. anode, catcher cavity, cathode, buncher cavity
    • B. cathode, buncher cavity, catcher cavity, cavity
    • C. anode, buncher cavity, catcher cavity, cathode
    • D. cathode, catcher cavity, anode, buncher cavity
      • Discuss
    • 2. In a loss line RL < Z0, then

    • Options
    • A. Reflection coefficient is zero
    • B. Reflection coefficient is ?
    • C. Reflection coefficient is negative
    • D. Reflection coefficient is positive
      • Discuss
    • 3. Assertion (A): A quarter wave transformer is used to match a resistive load to a transmission line.

      Reason (R): A quarter wave transformer is a transmission line of quarter wave length.


    • 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. The magnitudes of OC and SC input impedances of a transmission line an 100 ? and 25 ?. The characteristic impedance is

    • Options
    • A. 25 ?
    • B. 50 ?
    • C. 75 ?
    • D. 100 ?
      • Discuss
    • 5. Assertion (A): The velocity factor of a line is the ratio of wave velocity on the line to speed of light.

      Reason (R): If the conductors of a line are immersed in a non magnetic insulating liquid, the wave velocity increases.


    • 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
    • 6. A balun should have

    • Options
    • A. low SWR at both ports
    • B. high SWR at both ports
    • C. high SWR at input port and low SWR at output port
    • D. low SWR at input port and high SWR at output
      • Discuss
    • 7. The width of a radio beam from a 1 m diameter parabolic antenna at 1 GHz is about

    • Options
    • A. 100°
    • B. 50°
    • C. 5°
    • D. 2°
      • Discuss
    • 8. In microwave system the function of mode filter is

    • Options
    • A. to suppress modes with lower cut off frequencies
    • B. to suppress modes with higher cut off frequencies
    • C. to change mode of wave transmission
    • D. both (b) and (c)
      • Discuss
    • 9. The main feature of a parametric amplifier is

    • Options
    • A. low noise
    • B. very high gain
    • C. broad bandwidth
    • D. both (b) and (c)
      • Discuss
    • 10. If a line having Z0 = 300 ? 0 W is open circuited at far end, VSWR is

    • Options
    • A. 0
    • B. 1
    • C. ?
    • D. 2
      • Discuss

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