Directive gain of antenna

1. What is directive gain in antenna?
2. How is directional antenna gain calculated?
3. What is antenna gain formula?
4. What is gain and directivity?

What is directive gain in antenna?

2. Directive Gain (G_d): It is the ratio of radiation intensity in a particular direction to the average radiated power. G_d does not depend upon the power input to the antenna & its ohmic losses. The maximum value of directive gain is the directivity D of the antenna.

How is directional antenna gain calculated?

Assuming the antenna pattern is uniform, the gain is equal to the area of the isotropic sphere (4Br )2 divided by the sector (cross section) area.

What is antenna gain formula?

Antenna Gain Formula:

G _{d b i} =10 L o g ₁₀(η*4π* A )λ ².

What is gain and directivity?

By definition, directivity is the ability of an antenna to focus the radiation to a particular direction, whereas, the gain is the ability of the antenna to convert the input power into radio waves in a particular direction.