IEVref:702-08-54ID:
Language:enStatus: Standard
Term: spot noise temperature, <of a one-port>
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Definition: exchangeable noise power spectral density at a given frequency of a one-port divided by Boltzmann’s constant

Note 1 to entry: This definition assumes that quantum effects are negligible.

Note 2 to entry: The spot noise temperature has the sign of the real part of the one-port impedance. When the real part is positive, the exchangeable power becomes the available power.

Note 3 to entry: If the one-port has an impedance with a positive real part, its spot noise temperature at a given frequency equals the thermodynamic temperature to which a resistor equal in value to the real part of the impedance should be brought in order to obtain an available power of thermal noise equal to the available noise power of the one-port at the same frequency.

Note 4 to entry: A receiving antenna can be regarded as a one-port when viewed from its output port.


Publication date:2019-10
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Replaces:702-08-54:1992-03
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