a) Define the following Parameters w.rit antenna
(a) Radiation resistance
(b) Directivity
(c) Power gain
(d) Steradians & radians
(e) Beam Area
Answers
Answer:
a)Radiation resistance : Radiation of electromagnetic waves from the antenna.
b)Directivity : In electromagnetics, directivity is a parameter of an antenna or optical system which measures the degree to which the radiation emitted is concentrated in a single direction.
c)Power gain : An antenna power gains or simply gain is a key performance number which combines the antenna's directivity and electrical efficiency.
d)Steadman & radians : A radian is defined with the aid of figure. it is the angle of subtended by an arc.
radians : A radian cuts out a length circles of circumferance.
Beam area : Beam area is solid angle through which all the power radiated by the antenna.
beam angle is a set of angles between the half power points of the main lobe.