logo

CuriousTab

CuriousTab

Discussion


Home Electronics and Communication Engineering Microwave Communication Comments

  • Question
  • A microwave connector should have high SWR.


  • Options
  • A. True
  • B. False

  • Correct Answer
  • False 


  • Microwave Communication problems


    Search Results


    • 1. 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
    • 2. 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
    • 3. 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
    • 4. Which of the following statements is not correct regarding modes of electromagnetic energy transmission?

    • Options
    • A. In TE mode the direction of electric field is always and everywhere transverse to the direction of propagation
    • B. In TM mode the magnetic field pattern is always and everywhere transverse to the direction of propagation
    • C. The subscripts is TE and TM designations denote the number of half sine wave variations of the field components in x and y directions respectively.
    • D. TM11 is called the dominant mode.
    • Discuss
    • 5. If the peak transmitted power in a radar is increased by a factor 81, the maximum range is increased by a factor of

    • Options
    • A. 3
    • B. 9
    • C. 27
    • D. 81
    • Discuss
    • 6. 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
    • 7. 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
    • Discuss
    • 8. 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
    • 9. 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
    • 10. 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


    Comments

    There are no comments.

Enter a new Comment