of an antenna is a plot of the magnitude of the far field strength versus position around the antenna.

Related MCQs

• A rectangular horn antenna has an aperture area of 3λ × 2λ. If the aperture efficiency of an antenna is 90%, then the directivity of the antenna is:
• The electrical size of antenna is increased by antenna array to avoid size lobes compared to single antenna.
• A parabolic reflector used for reception with the direct broadcast system is 18 inches in diameter and operates at 12.4 GHz. The far-field distance for this antenna is:
• An antenna has a field pattern E (θ) =cos θ. cos 2θ. The first null beam width of the antenna is:
• An antenna has a field pattern of E (θ) = cos2 θ, θ varies between 0 and 900. Half power beam width of the antenna is:
• The basic equation of radiation that is applied to any antenna irrespective of the type of the antenna is:
• If the beam width of an antenna in two orthogonal planes are 300 and 600. Then the directivity of the antenna is:
• If the power input to an antenna is 100 mW and if the radiated power is measured to be 90 mW, then the efficiency of the antenna is:
• If an antenna has a directivity of 16 and radiation efficiency of 0.9, then the gain of the antenna is:
• Gain of an antenna is always greater than the directivity of the antenna.