Читать книгу Handbook of Microwave Component Measurements - Joel P. Dunsmore - Страница 28

Because of the common factor of temperature in many noise figure computations, the noise power is sometimes redefined as available noise temperature.

(1.63)

From this definition, the noise factor becomes

(1.64)

where T_RNA is the relative available noise temperature, expressed in Kelvin above 290 K.