Lens antennas are classified into two types. One being fast antenna, the other one is:

Related MCQs

• The antennas which offer high operational bandwidth and the antenna parameters are maintained over a wide range of antennas are called:
• 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.
• Based on the size of the loops, loop antennas are classified as small and large loops. This is the only classification of loop antenna.
•              antennas have gain less than reflector antennas but have more lenient tolerance on surfaces.
•                    antennas consist of a regular arrangement of antenna elements with a feed network
• If the beam width of an antenna in two orthogonal planes are 300 and 600. Then the directivity of the antenna is:
• The basic equation of radiation that is applied to any antenna irrespective of the type of the antenna is:
• An antenna has a field pattern E (θ) =cos θ. cos 2θ. The first null beam width of the antenna is:
•                    of an antenna is a plot of the magnitude of the far field strength versus position around the antenna.