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IEVref:712-02-56ID:
Language:enStatus: Standard
Term: figure of merit, <of an antenna receiving system>
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Symbol: G/T
Definition: quotient, usually expressed in logarithmic units, of the absolute gain G of an antenna by the antenna-receiver noise temperature T referred to the antenna terminals at a specified frequency and in specified conditions of installation and operation

Note 1 to entry: If the noise temperature is expressed in kelvins and the gain as a power ratio, the quantity 10 log G/T is expressed in a unit designated by the symbol dB (K−1), sometimes written incorrectly dBK.

Note 2 to entry: In English, the term "figure of merit" has different meanings in the fields of antennae in general (see IEV 712-02-55), transductors (see IEV 431-02-15) and piezoelectric and dielectric resonators (see IEV 561-01-26).

Note 3 to entry: In French, the term "facteur de qualité" has a different meaning for a two-terminal element or circuit (see IEV 151-15-45), for a resonant circuit (see IEV 151-15-46), for radiation protection purposes (see IEV 395-01-39), in the field of antennae in general (see IEV 712-02-55), and in radiology (see IEV 881-14-03).


Publication date:2021-04
Source:
Replaces:712-02-56:1992-04
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