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:

Related MCQs

• A rectangular horn antenna has an aperture area of 3λ × 2λ. Then the maximum directivity that can be achieved by this rectangular horn antenna is:
• If an antenna has a directivity of 16 and radiation efficiency of 0.9, then the gain 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:
• Gain of an antenna is always greater than the directivity of the antenna.
• Antenna that does not belong to the horn antenna family among the following are:
• Beamwidth and directivity are both measures of the focusing ability of an antenna.
• 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:
• The electrical size of antenna is increased by antenna array to avoid size lobes compared to single antenna.
• 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: