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:

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:
• If an antenna has a directivity of 16 and radiation efficiency of 0.9, then the gain of the antenna is:
• The solid area through which all the power radiated by the antenna is:
• What is the power radiated by the antenna with gain called as?
• Power radiated from an antenna per unit solid angle is called radiation intensity.
• The electrical size of antenna is increased by antenna array to avoid size lobes compared to single antenna.
• If the beam width of an antenna in two orthogonal planes are 300 and 600. Then the directivity 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:
• 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:
•                                are used in the final stages of radar and radio transmitters to increase the radiated power level.