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Two-Stage Cascaded Noise Figure

Calculate total noise figure for two cascaded stages using Friis’ formula.

Inputs

Inputs

Range: 0–40 dB

Enter stage 1 noise figure in dB at the operating frequency and bandwidth.

Range: -20–80 dB

Enter stage 1 available gain in dB at the same operating condition; this gain weights the next-stage contribution.

Range: 0–60 dB

Enter stage 2 noise figure in dB at the same reference plane and operating condition.

Result

Cascaded noise figure (dB)
1.179

Formula

Calculation logic

Formula definitions and substituted values.

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