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RF Transformer Calculator

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RF Transformer Calculator | Impedance Matching Tool
Ω
Ω
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RESULTS
NP TO NS (Turns Ratio)
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NS TO NP (Inverse Ratio)
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Input Parameters Specification

Input Impedance (Zi) The driving source side characteristic or primary network impedance matching terminal path, measured in Ohms (Ω).
Output Impedance (Zl) The termination load side electrical matching target resistance configuration feeding the network circuit, in Ohms (Ω).

Practical Operational Examples

Example 1: Standard 1:4 Impedance Step-Up Balun
• Input Impedance (Zi) = 50.00 Ω | Output Impedance (Zl) = 200.00 Ω
• Calculated Primary-to-Secondary (Np/Ns): 0.5000000 | Secondary-to-Primary (Ns/Np): 2.0000000
Example 2: Step-Down Matching Network
• Input Impedance (Zi) = 75.00 Ω | Output Impedance (Zl) = 12.00 Ω
• Calculated Primary-to-Secondary (Np/Ns): 2.5000000 | Secondary-to-Primary (Ns/Np): 0.4000000

RF Transformer Coil Winding Schematic

The layout illustrates the isolated multi-turn wire matching configurations tracing primary source lines to center-tapped secondary load lines.

INPUT PRI OUTPUT SEC

Formulas & Mathematical Logic

Primary to Secondary Turns Ratio Formulation (Np / Ns):
Np / Ns = sqrt(Input Impedance / Output Impedance)
Secondary to Primary Inverse Turns Ratio (Ns / Np):
Ns / Np = 1 / sqrt(Input Impedance / Output Impedance)

The transform framework applies the physical square-law induction rule to compute electrical winding relationships necessary to counter impedance step alterations directly.

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About this tool

RF Transformer Calculator is a free online calculator tool. Use it to get instant, accurate results for your electronics calculations.