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Impedance Matching Calculator
Evaluate RF impedance mismatch using complex load impedance. Calculate reflection coefficient, VSWR, return loss, mismatch loss, and reflected power before designing a matching network.
Input Parameters
Results
Equations Used
Complex Reflection Coefficient: Γ = (ZL - Z0) / (ZL + Z0)
VSWR: VSWR = (1 + |Γ|) / (1 - |Γ|)
Return Loss: RL = -20log10(|Γ|)
Mismatch Loss: ML = -10log10(1 - |Γ|²)
Reflected Power: Preflected = Pforward + 10log10(|Γ|²)
Frequently Asked Questions (FAQ)
Q1: What does this impedance matching calculator do?
It calculates reflection coefficient, VSWR, return loss, mismatch loss, and reflected power from a complex load impedance.
Q2: How is this different from a simple VSWR calculator?
This tool accepts complex load resistance and reactance, so it is useful before designing a matching network.
Q3: What is a good return loss?
For many RF systems, 10 dB is usable, 15 dB is better, and 20 dB or more is usually considered good.
Q4: What does negative reactance mean?
Negative reactance indicates a capacitive load, while positive reactance indicates an inductive load.
Q5: Does this design the matching network automatically?
No. It evaluates mismatch. Use an L-network or Smith chart workflow to synthesize component values.
