Antenna Radiation MCQ

Test your knowledge with important Antenna Radiation MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30+ more Antenna Radiation MCQs on Bissoy. Bissoy App

• If the field strength at receiving antenna is 1 µV/m, and the effective aperture area is 0.4 m2 and the intrinsic impedance of the medium is 377 Ω, then the power received by the antenna is:
  ক

  1.06 pW

  খ

  1.06 fW

  গ

  2 µW

  ঘ

  None of the mentioned
• Considering distance as a parameter, two types of field zones can be defined around an antenna.
  ক

  True

  খ

  False
• A source with a unidirectional cosine squared radiation intensity pattern is given by UMcos2 (θ). The directivity of the given source is:
  ক

  6

  খ

  8

  গ

  2

  ঘ

  7
• A source has a sine squared radiation intensity power pattern. The directivity of the given source is:
  ক

  1.5

  খ

  3

  গ

  2.5

  ঘ

  3.5
• A source has a radiation intensity pattern given by U=UM sin θ. The directivity of the source with this power pattern is:
  ক

  1

  খ

  1.27

  গ

  2.4

  ঘ

  3.4
• A source has a cosine power pattern that is bidirectional. Given that the directivity of a unidirectional source with cosine power pattern has a directivity of 4, then the directivity of the unidirectional source is:
  ক

  1

  খ

  2

  গ

  4

  ঘ

  8
• A source has a cosine radiation-intensity pattern given by U=UM cos (θ). The directivity of this source is:
  ক

  2

  খ

  4

  গ

  6

  ঘ

  8
• The expression for pointing vector of an isotropic point source at a distance ‘r’ from the source is given by:
  ক

  P/ 4πR2

  খ

  P/4π

  গ

  P/ 4πR

  ঘ

  P×4πR2
• Antennas that radiate energy only in a specified are called anisotropic antennas.
  ক

  True

  খ

  False
• An antenna source that radiates energy uniformly in all the directions is called:
  ক

  Isotropic source

  খ

  Anisotropic source

  গ

  Point source

  ঘ

  None of the mentioned