The RF Transformer Conversion Calculator determines the turns ratio between the primary and secondary windings of an RF transformer based on their respective impedances. It’s useful for impedance matching and power transfer optimization in RF circuits, transmitters, and amplifiers.
Formula
Np / Ns = √(Zp / Zs)
Ns / Np = √(Zs / Zp)
Formula Explanation
- Zp = Primary impedance (Ω)
- Zs = Secondary impedance (Ω)
- Np = Number of turns in the primary coil
- Ns = Number of turns in the secondary coil
- The transformer turns ratio determines how voltage and current are stepped up or down while maintaining power balance.
Uses of this calculator
- Impedance matching between RF circuits and antennas.
- Designing broadband transformers for amplifiers and mixers.
- Optimizing signal transfer efficiency in transmission systems.
- Evaluating turn ratios for custom RF transformer designs.
What is the turns ratio for a 50 Ω to 200 Ω RF transformer?
Input: Zp = 50 Ω, Zs = 200 Ω
Output:
- Np / Ns = √(50 / 200) = √(0.25) = 0.5
- Ns / Np = √(200 / 50) = √(4) = 2
- The transformer should have a turns ratio of 1:2 (primary:secondary) to match 50 Ω to 200 Ω.