Antenna and Wave Propagation Question with Answer


11. Directivity and Resolution are ..............

  1. Different
  2. same
  3. Both a and b
  4. none

12. Effective aperture is always .............. than Physical aperture.

  1. Higher
  2. lower
  3. Both a and b
  4. none

13. .............. Theorem can be applied to both circuit and field theories

  1. Equality of patterns
  2. Equality of impedance
  3. Equality of effective lengths
  4. Reciprocity theorem

14. Antenna temperature considers .............. parameter into account

  1. Directivity
  2. gain
  3. Beam area
  4. beam efficiency

15. Radiation resistance of antenna is ..............

  1. Physical resistance
  2. Virtual Resistance
  3. Both a and b
  4. none

16. Antenna aperture is same as ..............

  1. Length
  2. width
  3. Area
  4. volume

17. The source of scalar potential is

  1. Charge density
  2. Current density
  3. Both a and b
  4. none

18. The source of vector potential is

  1. Charge density
  2. Current density
  3. Both a and b
  4. none

19. R/v is called ..............

  1. Radiation to voltage ratio
  2. resistance to velocity ratio
  3. Propagation delay
  4. none

20. Which condition makes coupled equations into uncoupled equations

  1. Retarded
  2. Helmholtz
  3. Lorentz gauge
  4. none

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