Microstrip Line Impedance Calculator

Microstrip Line Impedance Calculator calculator can be used to calculate the characteristic impedance of a microstrip line based on its dimensions and the dielectric constant of the substrate.

Input Parameters

Calculation Results

Calculation Formula

Z₀ = 120π / √(εᵣ * (1 + (4h/w))) * 1 / √((1 + (w/4h)) / (1 - (w/4h) * coth(2πh/w)))

Where:
Z₀ = Characteristic Impedance (Ω)
εᵣ = Relative Permittivity
h = Substrate Height (m)
w = Microstrip Width (m)

Microstrip Line Impedance Calculator Usage Guide

Learn how to use the Microstrip Line Impedance Calculator calculator and its working principles

How to Use the Calculator

  1. Enter the relative permittivity (εr) of the dielectric material.
  2. Enter the height (h) of the substrate in meters.
  3. Enter the width (w) of the microstrip line in meters.
  4. Click the "Calculate" button to compute the characteristic impedance (Z₀).
  5. The result will be displayed in ohms.

Working Principle

The characteristic impedance (Z₀) of a microstrip line is a measure of the impedance that a transmission line presents to a signal traveling along it. It depends on the dimensions of the microstrip line and the dielectric constant of the substrate material. The formula used in this calculator is derived from electromagnetic theory and provides an accurate estimate of the impedance for typical microstrip configurations.