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

  • In Gunn diode electrons are transferred from


  • Options
  • A. Ridge guide is essentially a form of capacitively loaded guide
  • B. low to high mobility energy bands
  • C. valley to domain formation
  • D. domain to valley formation

  • Correct Answer
  • Ridge guide is essentially a form of capacitively loaded guide 

    • Microwave Communication problems

    Search Results

    • 1. In the given figure shows a 10dB directional coupler. If power input at port 1 is 100 mW, power output at port 3 is

    • Options
    • A. 10 mW
    • B. 15 mW
    • C. 20 mW
    • D. 25 mW
      • Discuss
    • 2. A microwave connector should have high SWR.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. In microwave communication links the fading due to rain occurs. The methods to solve this problem include

    • Options
    • A. antenna replacement and feed correction
    • B. amplitude trimming and phase correction
    • C. polarization shifting and code diversity
    • D. path diversity and frequency diversity
      • Discuss
    • 4. Oscillations are obtained from a reflex klystron only for combinations of anode voltage and repeller voltage that give a favourable transit time.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. In 8 cavity magnetron the p mode corresponds to a total phase shift equal to

    • Options
    • A. ± 8 p radians around the periphery
    • B. ± 4 p radians around the periphery
    • C. ± 2 p radians around the periphery
    • D. ± 16 p radians around the periphery
      • Discuss
    • 6. Satellite communication systems use the frequency band

    • Options
    • A. 10 to 20 MHz
    • B. 50 to 70 MHz
    • C. 3 to 6 GHz
    • D. 100 to 120 GHz
      • Discuss
    • 7. If ?r is relative permeability, ?r is relative permittivity, c is velocity of light fc is cutoff frequency, phase velocity vp (i.e., speed with which a particular phase of the wave travels down a rectangular waveguide at frequency f) is given by

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 8. For a directional coupler the power is in the ratio of

    • Options
    • A. 40 dB
    • B. 30 dB
    • C. 20 dB
    • D. 10 dB
      • Discuss
    • 9. In a high frequency coaxial line and the length of line characteristic impedance is a function of

    • Options
    • A. properties of insulating material only
    • B. inner and outer conductor radius only
    • C. both (a) and (b)
    • D. neither (a) nor (b)
      • Discuss
    • 10. The characteristic impedance of a cable is about

    • Options
    • A. 300 ?
    • B. 50 ?
    • C. 5 ?
    • D. 2 ?
      • Discuss

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