Question

if antenna radiates over half a sphere,directivity of the antenna is
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Answer 1

Explanation:

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Answer 2

Concept:

Directivity of the antenna can be defined as the measure of the concentration of an antenna's radiation pattern in a particular direction. It can be written as 4π/ beam area.

Given:

The area of the antenna is radiated over half of the area of the sphere.

Find:

The directivity of the antenna.

Solution:

As the antenna radiates over half of the sphere. So, the beam area of the antenna will be 2π.

As the directivity of the antenna can be written as

Directivity = 4π/ beam area

Directivity = 4π/ 2π

Directivity = 2

Hence, the directivity of the antenna is 2 if the antenna radiates over half a sphere.

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