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The ratio of maximum power density in the desired direction to the average power radiated from the antenna is called as _______

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The ratio of maximum power density in the desired direction to the average power radiated from the antenna is called as _______

(a) directivity

(b) directive gain

(c) power gain

(d) partial directivity

The question was asked during an internship interview.

The above asked question is from Directivity in division Antenna Parameters of Antennas

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Correct choice is (a) directivity

To explain: The ratio of maximum power density in the desired direction to the average power radiated from the antenna is called Directivity. The ratio of power radiated in a particular direction to the actual power input to antenna is called Power gain. Directive gain is the ratio of power radiated in desired direction to the average power radiated from the antenna.  Maximum Directive gain is called as Directivity. Partial directivity is the part of radiation intensity in a particular polarization to radiation intensity in all directions.

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