Transcription of Antennas - GATEstudy.com
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Antennas - GATEstudy.com
Antennas 1. For a dipole antenna (a) The radiation intensity is maximum along the normal to the dipole axis (b) The current distribution along its length is uniform irrespective of the length (c) The effective length equals its physical length (d) The input impedance is independent of the location of the feed point [GATE 1994: 1 Mark] Soln. A dipole antenna is a linear antenna , usually fed in the center and producing maximum of radiation in the plane normal to the axis. It is said to be short dipole when length is less than and current distribution is sinusoidal.
3. Yagi Uda antenna is a high bandwidth antenna used for TV reception Option (b) 15. The directivity of an antenna array can be increased by adding more antenna elements, as a larger number of elements (a) Improves the radiation efficiency (b) Increases the effective area of the antenna (c) Results in a better impedance matching
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