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  • Question

  • The arrangement in the given figure is a hybid T. If 100 mW fed at port 1, the power reflected back at port 1 is
    The arrangement in the given figure is a hybid T. If 100 mW fed at port 1, the power reflected back


  • Options
  • A. 0
  • B. 25 mW
  • C. 50 mW
  • D. 100 mW

  • Correct Answer
  • 50 mW 

    • Microwave Communication problems

    Search Results

    • 1. Ridge waveguide is essentially a form of capacitively loaded guide.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. 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
    • 3. 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
    • 4. 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
    • 5. 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
    • 6. Frequency range for satellite communication is

    • Options
    • A. 1 kHz to 100 kHz
    • B. 100 kHz to 10 MHz
    • C. 10 MHz to 100 MHz
    • D. 1 GHz to 30 GHz
      • Discuss
    • 7. A TEM wave is incident normally on a perfect conductor. The E and H fields at boundary will respectively be

    • Options
    • A. minimum and maximum
    • B. minimum and minimum
    • C. maximum and minimum
    • D. maximum and maximum
      • Discuss
    • 8. As compared to LED, LASER has

      1. higher emission efficiency
      2. no tuning arrangement
      3. narrow spectral width
      4. provision for confinement
      Of these statements

    • Options
    • A. 1, 2, 3 are correct
    • B. 1, 2, 4 are correct
    • C. 1 and 3 are correct
    • D. 1, 3, 4 are correct
      • Discuss
    • 9. Consider the following statements about a magic tee

      1. The collinear arms are isolated from each other.
      2. On of the collinear arms is isolated from E arm.
      3. On of the collinear arms is isolated from H arm.
      4. E and H arms are isolated from each other.
      Of the above statements

    • Options
    • A. 1 and 2 are correct
    • B. 1 and 3 are correct
    • C. 1 and 4 are correct
    • D. 2 and 3 are correct
      • Discuss
    • 10. A directional coupler is used

    • Options
    • A. to transmit microwave signals
    • B. to generate microwave signals
    • C. to measure amplitude and phase of a travelling wave
    • D. both (a) and (b)
      • Discuss

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