Noise temperature: Difference between revisions
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<div class="definition"><div class="short_definition">A measure of the [[noise power]] of a device or circuit.</div><br/> <div class="paragraph">The noise temperature is the [[temperature]] of a resistor that has noise power equal to that of the device or circuit. Specifically, the noise temperature is defined by ''T'' = ''N''/''kB'', where ''N'' is the noise power within [[bandwidth]] ''B'', and ''k'' = 1.38 × 10<sup>-23</sup>J K<sup>-1</sup> is [[Boltzmann's constant]]. A [[radar]] system is characterized by several noise temperatures: the [[antenna]] temperature ''T''<sub>''a''</sub>, the [[receiver]] temperature ''T''<sub>''r''</sub>, and the transmission line temperature ''T''<sub>''l''</sub>. The transmission line temperature is a measure of the noise power within the receiver bandwidth generated by the resistive losses in the transmission line or [[waveguide]] between the antenna and the receiver. The transmission line temperature is frequently combined with either the antenna or the receiver temperature, depending on the reference point for the measurement. The total system temperature is ''T'' = ''T''<sub>''a''</sub> + ''T''<sub>''l''</sub> + ''T''<sub>''r''</sub>.</div><br/> </div> | <div class="definition"><div class="short_definition">A measure of the [[noise power]] of a device or circuit.</div><br/> <div class="paragraph">The noise temperature is the [[temperature]] of a resistor that has noise power equal to that of the device or circuit. Specifically, the noise temperature is defined by ''T'' = ''N''/''kB'', where ''N'' is the noise power within [[bandwidth]] ''B'', and ''k'' = 1.38 × 10<sup>-23</sup>J K<sup>-1</sup> is [[Boltzmann's constant]]. A [[radar]] system is characterized by several noise temperatures: the [[antenna]] temperature ''T''<sub>''a''</sub>, the [[receiver]] temperature ''T''<sub>''r''</sub>, and the transmission line temperature ''T''<sub>''l''</sub>. The transmission line temperature is a measure of the noise power within the receiver bandwidth generated by the resistive losses in the transmission line or [[waveguide]] between the antenna and the receiver. The transmission line temperature is frequently combined with either the antenna or the receiver temperature, depending on the reference point for the measurement. The total system temperature is ''T'' = ''T''<sub>''a''</sub> + ''T''<sub>''l''</sub> + ''T''<sub>''r''</sub>.</div><br/> </div> | ||
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== temperatura de ruido == | |||
Es una medida de la potencia de ruido de un dispositivo o circuito. | |||
La temperatura de ruido es la temperatura de una resistencia que tiene una potencia de ruido igual a la del dispositivo o circuito. Específicamente, la temperatura de ruido se define como ''T'' = ''N''/''kB'', donde ''N'' es la potencia de ruido dentro del ancho de banda ''B'', y ''k'' = 1.38 x 10-23J K-1 es la constante de Boltzmann. Un sistema de radar se caracteriza por una variedad de temperaturas de ruido: la temperatura de antena ''Ta'', la temperatura del receptor ''Tr'' y la temperatura de la línea de transmisión ''Tl''. La temperatura de la línea de transmisión es una medida de la potencia de ruido dentro del ancho de banda del receptor generada por las pérdidas resistivas en la línea de transmisión o guía de ondas entre la antena y el receptor. La temperatura de la línea de transmisión se combina frecuentemente con la temperatura de la antena o la del receptor; esto depende del punto de referencia para la medición. La temperatura total del sistema es ''T'' = ''Ta'' + ''Tl'' + ''Tr''. | |||
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Latest revision as of 07:29, 4 January 2024
noise temperature[edit | edit source]
A measure of the noise power of a device or circuit.
The noise temperature is the temperature of a resistor that has noise power equal to that of the device or circuit. Specifically, the noise temperature is defined by T = N/kB, where N is the noise power within bandwidth B, and k = 1.38 × 10-23J K-1 is Boltzmann's constant. A radar system is characterized by several noise temperatures: the antenna temperature Ta, the receiver temperature Tr, and the transmission line temperature Tl. The transmission line temperature is a measure of the noise power within the receiver bandwidth generated by the resistive losses in the transmission line or waveguide between the antenna and the receiver. The transmission line temperature is frequently combined with either the antenna or the receiver temperature, depending on the reference point for the measurement. The total system temperature is T = Ta + Tl + Tr.
temperatura de ruido[edit | edit source]
Es una medida de la potencia de ruido de un dispositivo o circuito.
La temperatura de ruido es la temperatura de una resistencia que tiene una potencia de ruido igual a la del dispositivo o circuito. Específicamente, la temperatura de ruido se define como T = N/kB, donde N es la potencia de ruido dentro del ancho de banda B, y k = 1.38 x 10-23J K-1 es la constante de Boltzmann. Un sistema de radar se caracteriza por una variedad de temperaturas de ruido: la temperatura de antena Ta, la temperatura del receptor Tr y la temperatura de la línea de transmisión Tl. La temperatura de la línea de transmisión es una medida de la potencia de ruido dentro del ancho de banda del receptor generada por las pérdidas resistivas en la línea de transmisión o guía de ondas entre la antena y el receptor. La temperatura de la línea de transmisión se combina frecuentemente con la temperatura de la antena o la del receptor; esto depende del punto de referencia para la medición. La temperatura total del sistema es T = Ta + Tl + Tr.
