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RF Thermal Noise Floor

Calculate available thermal noise power from receiver bandwidth and physical temperature.

Inputs

Inputs

Range: 1–10,000,000,000 Hz

Enter available-noise bandwidth in Hz; use equivalent noise bandwidth when known.

Range: 1–1,000 K

Enter physical noise temperature in kelvin; 290 K is a reference condition, not a receiver noise figure.

Result

Available thermal noise power (mW)
0.000000000080
Available thermal noise power (W)
0.000000000000
Available thermal noise power (dBm)
-100.965

Formula

Calculation logic

Formula definitions and substituted values.

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Screening tool. Verify the result against the manufacturer's published rating, the actual equipment, route, floor, and applicable local requirements before ordering, installing, or relying on it.