High directivity required in RADAR communication is satisfied using this type of antennas:

Related MCQs

• The antennas which offer high operational bandwidth and the antenna parameters are maintained over a wide range of antennas are called:
•              antennas have gain less than reflector antennas but have more lenient tolerance on surfaces.
• Beamwidth and directivity are both measures of the focusing ability of an antenna.
• If the beam width of an antenna in two orthogonal planes are 300 and 600. 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:
• Gain of an antenna is always greater than the directivity of the antenna.
• 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:
• 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:
•                                are used in the final stages of radar and radio transmitters to increase the radiated power level.
• Dipole antennas are an example for: