RF impedance Smith coordinates calculator

Calculate normalized resistance-reactance and smith reflection point real-imaginary with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use normalized resistance-reactance and smith reflection point real-imaginary to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Load resistance (ohms)
75
Load reactance (ohms)
25
Real reference impedance (ohms)
50
Normalized resistance-reactance
[1.5,0.5]
Smith reflection point real-imaginary
[0.230769230769,0.153846153846]

Try another scenario

Load resistance (ohms)
82.5
Load reactance (ohms)
25
Real reference impedance (ohms)
50
Normalized resistance-reactance
[1.65,0.5]
Smith reflection point real-imaginary
[0.271227225851,0.137504297009]
Calculation method

Calculation method

Normalized resistance-reactance

Load impedance / reference impedance.

Smith reflection point real-imaginary

(normalized Z−1)/(normalized Z+1).

Symbols and units
a
Load resistance (ohms)
b
Load reactance (ohms)
c
Real reference impedance (ohms)

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • Complex impedance, reference impedance. Returns Normalized impedance and reflection point. All coefficients and observations are user supplied; results describe only the stated mathematical model. Quantities are deterministic calculations from supplied observations and assumptions; no external data is fetched. Supported limits: Finite inputs only; numeric fields bounded as labelled. Lists and JSON records are limited to 256 entries unless a stricter tool bound is stated. No automatic design approval, legal conclusion, treatment recommendation or safety certification. Load resistance (ohms): minimum 1e-12, maximum 1000000000000.0. Load reactance (ohms): minimum None, maximum 1000000000000.0. Real reference impedance (ohms): minimum 1e-12, maximum 1000000000000.0.
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Further reading

Method reference ↗

Background reading; this does not imply endorsement or independent review of SumFizz.

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