Quarter Wave Transformer Calculator | Impedance Matching Tool

The Quarter Wave Transformer Impedance Calculator determines the characteristic impedance needed to match two different transmission line impedances using a quarter wavelength section. This technique maximizes power transfer and minimizes reflections.

EXAMPLE:

• INPUTS:

  • Input Impedance = 50 Ohm
  • Load Impedance = 100 Ohm

• OUTPUT:

  • Matching Impedance = 70.71 Ohm

Quarter Wave Transformer Formula

Where, Zin = input impedance, Zload = Load or output impedance, Zmatch = Matching Impedance of quarter wave line.

Benefits/Applications

• Simplifies impedance matching: Core tool in RF design.
• Reduces VSWR: Ensures smoother power flow and reduces return loss.
• Widely used in antennas and filters: Practical for matching disparate components.

Summary:

Use this calculator to compute the ideal transformer impedance for quarter wavelength matching, ensuring maximum transfer and minimal reflection in RF systems.