What Do You Know About Antenna And Radio Wave Propagation? Quiz

15 Questions | Total Attempts: 65

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What Do You Know About Antenna And Radio Wave Propagation? Quiz - Quiz

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Questions and Answers
  • 1. 
    What is the polarization of a discone antenna?
    • A. 

      Vertical

    • B. 

      Horizontal

    • C. 

      Circular

    • D. 

      Spiral

  • 2. 
    If the antenna increases 3.3 times how much does the radiated power increase?
    • A. 

      3.3 times

    • B. 

      10.89 times

    • C. 

      9.9 times

    • D. 

      6.6 times

  • 3. 
    When speaking of antennas. ______ is a section which would be a complete antenna by itself.
    • A. 

      Image

    • B. 

      Top loading

    • C. 

      Bay

    • D. 

      Quarterwave

  • 4. 
    In what range of frequencies are most omnidirectional horizontally polarized antennas used?
    • A. 

      VHF, UHF

    • B. 

      VLF, LF

    • C. 

      SH, EHF

    • D. 

      MF, HF

  • 5. 
    If the current ratios of the two or more elements must be held 5% and the phase angle to 3° the antenna is called a
    • A. 

      End fire array

    • B. 

      Critical phased array

    • C. 

      Broadband array

    • D. 

      Wideband array

  • 6. 
    A device that converts high-frequency current into electromagnetic wave.
    • A. 

      Antenna

    • B. 

      Loudspeaker

    • C. 

      Microphone

    • D. 

      Transducer

  • 7. 
    Which is a non-resonant antenna?
    • A. 

      Rhombic antenna

    • B. 

      Folded dipole

    • C. 

      End-fire array

    • D. 

      Yagi-Uda antenna

  • 8. 
    Gain of a half-wave dipole antenna over isotropic.  
    • A. 

      2.15 dB

    • B. 

      1.76 dB

    • C. 

      1 dB

    • D. 

      0dB

  • 9. 
    Very low signal strength in antenna.
    • A. 

      Minor lobes

    • B. 

      Null

    • C. 

      Antenna patterns

    • D. 

      Major lobes

  • 10. 
    What is the gain of the Hertzian dipole over isotropic antenna?
    • A. 

      1.64 dB

    • B. 

      2.15 dB

    • C. 

      1.76 dB

    • D. 

      1.55 dB

  • 11. 
    ______ is the measurement of unilateral antenna properties of directivity
    • A. 

      Phase angle

    • B. 

      Antenna gain

    • C. 

      Beamwidth

    • D. 

      Bandwidth

  • 12. 
    In testing the transmitter to prevent interfering with other stations, which type of antenna must be used?
    • A. 

      Void antenna

    • B. 

      Dummy antenna

    • C. 

      Hertzian antenna

    • D. 

      Isotropic antenna

  • 13. 
    The best solution to fading is _____.
    • A. 

      Space diversity

    • B. 

      Frequency diversity

    • C. 

      Polarization diversity

    • D. 

      Wavelength diversity

  • 14. 
     _____ is the amount of uncertainty in a system of symbols.
    • A. 

      Bandwidth

    • B. 

      Enthalpy

    • C. 

      Entropy

    • D. 

      Quantum

  • 15. 
    If an antenna has a gain of 3 dB, it increases the output of the transmitter by
    • A. 

      10,000 times

    • B. 

      1000 times

    • C. 

      100 times

    • D. 

      1 million times

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