ANTENNA PARAMETERS
1. RADIATION PATTERN:
· An antenna radiation pattern or antenna pattern is defined as a mathematical function or a graphical representation of the radiation properties of the antenna as a function of space coordinates .
· It is found in the practice that radiation energy from antenna is not same in all directions. Instead ,it is more in one direction and less or zero in other direction.
· The energy radiated in a particular direction by an antenna is measured in the terms of field strength at a point which is at a particular distance from antenna.
· Radiation pattern of an antenna is nothing but a graph which shows the variation in the actual field of the electromagnetic field at all points which are at equal distance from antenna.
· A radiation lobe is a portion of the radiation pattern bounded by regions of
relatively weak radiation intensity.
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