Describe with respect to antenna (i) radiation pattern (ii) directive gain (iii) power gam (iv) polarization

1 Answer

(i) Radiation pattern:-A graph or diagram which tells us about the manner in which an antenna radiates more power in different directions is known as the radiation patteren of antenna. 

(ii) Directive gain:- Directive gain is defined as the ratio of the power desity in a particular direction of one antenna to the power density that would be radiated byisotropic antenna in the same direction. 

(iii)Power gain:-The power gain of an antenna is defined as the ratio of power fed to an isotropic antenna to the power fed to a directional antenna, to develop the same field strength at the same direction.

(iv)Polarization:-Polarization is defined as the direction of the electric vector in the electromagnetic wave radiated by the transmitting antenna. 
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