Power Gain

Power Gain

1. The ratio of the power that a transducer delivers to a specified load, under specified operating conditions, to the power absorbed by its input circuit.
   If the input and/or output power consist of more than one component, such as multifrequency signal or noise, then the particular components used and their weighting must be specified. This gain is usually expressed in decibels.
2. Of an antenna, in a given direction, 4pi times the ratio of the radiation intensity in that direction to the total power delivered to the antenna.

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use