Effective Power Radiated by an Antenna – Class 12 | Chapter – 15 | Physics Short Notes Series PDF for NEET & JEE
Effective Power Radiated by an Antenna: Effective power radiated by an antenna is a measure of the amount of power radiated by an antenna in a particular direction. It is defined as the ratio of the total power radiated by the antenna to the power required to produce a uniform power density over a sphere of a particular radius enclosing the antenna. The effective power radiated by an antenna is expressed in terms of the antenna gain and the input power to the antenna.
Effective Power Radiated by an Antenna
The antenna gain is a measure of the directivity of the antenna and is defined as the ratio of the radiation intensity in a particular direction to the radiation intensity that would be obtained if the power were radiated equally in all directions. The input power to the antenna is the power that is supplied to the antenna from the transmitter.
The effective power radiated by an antenna can be calculated using the following formula:
Effective power radiated = (Antenna gain) x (Input power)
The effective power radiated by an antenna is an important parameter in antenna design and is used to determine the range and coverage area of the antenna. It is also used to evaluate the performance of the antenna in various applications such as communication, navigation, and radar systems.
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