Internal noise sources
Noise in hyper frequencies - Origin and modeling
Article REF: E1380 V2
Internal noise sources
Noise in hyper frequencies - Origin and modeling

Author : Gérard CACHIER

Publication date: February 10, 2013, Review date: September 11, 2023 | Lire en français

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2. Internal noise sources

2.1 Thermal noise

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2.1.1 Calculating noise in a conductor rod

Thermal noise is generated by the agitation of electrified particles or "carriers", and was observed by Johnson in 1927.

It is assumed that the carriers in the conductor bar are in thermal equilibrium and are transported from one electrode to the other, undergoing numerous collisions. A random source of current develops at its terminals, such as :

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