Microwave Devices

7 Questions | Total Attempts: 185

SettingsSettingsSettings
Please wait...
Microwave Devices

Answer all the following questions. Be honest to yourself as God is watching us.


Questions and Answers
  • 1. 
    Why do you choose to use waveguide?
    • A. 

      To replace the free space medium microwave propagation

    • B. 

      To allow the wave to travel down the device smoothly

    • C. 

      To make full use of the medium in order to achieve efficient transmission

    • D. 

      To allow the microwave energy to be guided in a certain transmission medium

    • E. 

      To minimize losses dissipated in the free space

  • 2. 
    What is the main limitation of using the waveguide?
    • A. 

      Dimensions of the waveguide

    • B. 

      Frequency of operation

    • C. 

      Aperture of the waveguide

    • D. 

      Propagation mode of operation

    • E. 

      Selection of materials

  • 3. 
    Which is determining the orientation of the electric field at the aperture of the waveguide?
    • A. 

      The frequency of operation plays an important factor in orientating the electric field distribution

    • B. 

      The dimensions of the waveguide enable the selection of the frequency of operation

    • C. 

      The mode of operation influences the direction of electric field

    • D. 

      The cut-off frequency of the waveguide contributes to the change in the microwave propagation

    • E. 

      Non of the above

  • 4. 
    Which of the following best describes the operation of microwave tubes?
    • A. 

      It is similar with the opreration of electronic tubes

    • B. 

      Microwva tubes consist of klystrons, magnetrons and photons

    • C. 

      Microwave tubes can be divided into klystrons, magnetrons and travelling wave tubes

    • D. 

      Microwave tubes use electron beam which allows interation between space charge waves and electromagnetic fields

    • E. 

      Microwave tubes are linear beam which can also be recognized as o-type tubes which have similar direction between electric and magnetic fields

  • 5. 
    Briefly describe the steps that are essential to be taken into account in designing a waveguide with TE 10 mode operation (10 marks)
  • 6. 
    -You have been assigned by your Senior Manager to design a waveguide operating in the x-band frequency range. You found that the dimensions are not fitted for microwave measurements. Discuss factors of the problem and suggest options to get the problems sorted out.
  • 7. 
    Which of the following factor clearly affects the efficiency of an antenna design?
    • A. 

      Propagation constant

    • B. 

      Impedance matching

    • C. 

      Gain

    • D. 

      Dielectric loss