Construct · 1 fields · 1 citations

noise figure: a standalone construct

One name. One construct. A landmark on the map.

● anchor · a single construct in RF engineering Nearest construct by meaning·not indexed
noisefigure1 CONSTRUCTNoise figureFRIIS · SNR DEGRADATION

A single standalone construct; nearby constructs are located against it in the Collider. Tap a field for its definition, unit, and measures.

RF engineering

How much a stage degrades the signal-to-noise ratio

In radio-frequency engineering, the noise figure measures how much a receiver or amplifier stage worsens the signal-to-noise ratio of whatever passes through it: it is the ratio of the input signal-to-noise ratio to the output signal-to-noise ratio, expressed in decibels, with an ideal noiseless stage scoring 0 dB. Friis's 1944 Noise figures of radio receivers defined the quantity and the cascade formula showing why the first stage dominates a receiver's overall noise. The referent is the added-noise penalty of a component or chain, a core figure of merit for receiver sensitivity in radio, radar, and communications front-ends.[1]

Unit
Decibels of signal-to-noise-ratio degradation added by a stage
Recovery means
Not applicable
Measured by
Measured by the Y-factor or gain/noise methods and combined across a chain with the Friis cascade formula

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Nearby constructs

cascade4 fields · 4 citationsjingle · one word, four constructschain3 fields · 3 citationsjingle · one word, three constructscomponent3 fields · 5 citationsjingle · one word, three constructs

References

  1. Friis, H. T. (1944). Noise figures of radio receivers. Proceedings of the IRE, 32(7), 419–422. https://doi.org/10.1109/JRPROC.1944.232049

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