where Zin is the feedpoint impedance. ==Figures used for antenna gain== ==Example calculation== ==Total radiated power== Total radiated power is a measurement of antenna gain with or without the power absorption effects (loss) that may be caused by objects in the proximity of the antenna. TRP is measured in the lab as radiated power compared to an...
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http://en.wikipedia.org/wiki/Antenna_gain
Antenna Gain 1. In technical terms, the gain is the ratio of the power required at the input of a loss-free reference antenna to the power supplied to the input of the given antenna to produce, in a given direction, the same field strength at the same distance. Antenna gain is usually expressed in decibels and the higher the gain the more powerful ...
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An antenna's transmission power, provided as a ratio of its output (send) signal strength to its input (receive) signal strength, normally expressed in dBi. The higher the dBi, the stronger the antenna.
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