IEVref: 712-02-55 ID: Language: en Status: Standard Term: figure of merit, Synonym1: Synonym2: Synonym3: Symbol: G/T Definition: quotient, usually expressed in logarithmic units, of the absolute gain G of an antenna to its 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 relation to antenna receiving systems (see IEV 712-02-56), 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 relation to antenna receiving systems (see IEV 712-02-56), and in radiology (see IEV 881-14-03). Publication date: 2021-04 Source: Replaces: 712-02-55:1992-04 Internal notes: CO remarks: TC/SC remarks: VT remarks: Domain1: Domain2: Domain3: Domain4: Domain5: