Noise power

The radiation noise emitted from wiring into the air as electromagnetic waves, converted into electric power. Noise power is caused by the thermal motion of electrons determined by the temperature of a resistor (conductor), and is therefore also called thermal noise. The noise power Pn generated from a resistor (conductor) is expressed by the following formula, where the Boltzmann constant is k (J/K), the absolute temperature is T (K), and the frequency bandwidth is B (Hz).

Pn = kTB (W)

When expressing noise power, decibels (dBPW), obtained by taking the logarithm with 1PW as the reference, are used.