calc.engineer / RF & Antennas / Noise Figure Cascade

Noise Figure Cascade v1.0.0

Calculate the cascaded noise figure of a multi-stage receiver chain using the Friis formula. Each stage has a noise figure and gain in dB. The first stage dominates overall system noise, which is why low-noise amplifiers (LNAs) are placed at the front of the chain. Returns total cascaded noise figure, total gain, and equivalent noise temperature. Feeds into link_budget for complete receive-chain sensitivity analysis.

feeds link_budget →
Ordered array of receiver chain stages, each with nf_db and gain_db
Fill in the inputs and Compute to see the structured result.

From an agent (MCP) or the API

curl -X POST https://calc.engineer/api/noise_figure_cascade \
  -H "Content-Type: application/json" \
  -d '{"stages": …}'

MCP: connect to https://calc.engineer/mcp and call noise_figure_cascade.

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