calc.engineer / RF & Antennas / Attenuator Pi

Attenuator Pi v1.0.0

Design a Pi-topology resistive attenuator pad. Given a desired attenuation in dB and characteristic impedance (default 50 ohm), computes the three resistor values for a symmetrical Pi-pad network. The Pi attenuator uses two shunt resistors (R1, R3) and one series resistor (R2). Commonly used in RF signal chains to reduce signal level while maintaining impedance match. Compare with attenuator_tee for T-pad topology.

Desired attenuation in decibels (positive value)
Characteristic impedance in ohms (default 50)
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/attenuator_pi \
  -H "Content-Type: application/json" \
  -d '{"attenuation_db": …, "z0_ohm": …}'

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

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