calc.engineer / PCB & Electronics / Impedance Match

Impedance Match v1.0.0

Designs an L-network impedance matching circuit between two real impedances at a given frequency. Computes the required shunt and series reactive components (inductor and capacitor) to transform the source impedance to the load impedance. The network Q factor is sqrt(Rh/Rl - 1) where Rh is the higher impedance. Topology is automatically selected: the shunt element is placed across the higher impedance side. Essential for antenna matching, amplifier input/output matching, and maximizing power transfer. Chain from lc_resonance to match at a tank circuit's resonant frequency.

← from lc_resonancefeeds trace_width →
Source impedance in ohms (real, resistive). Must differ from load impedance.
Load impedance in ohms (real, resistive). Must differ from source impedance.
Design frequency in megahertz for component value calculation.
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/impedance_match \
  -H "Content-Type: application/json" \
  -d '{"source_ohm": …, "load_ohm": …, "freq_mhz": …}'

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

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