What is microstrip?
A microstrip is a PCB trace routed over a reference plane.
Impedance parameters
Characteristic impedance depends on trace width, dielectric height, dielectric constant and copper thickness.
Why controlled impedance matters
Incorrect impedance can cause reflections, signal integrity problems and RF mismatch.
Practical PCB notes
Use the stackup from your PCB manufacturer. FR-4 dielectric constant varies with frequency.
Design notes
For accurate RF or high-speed designs, verify with field solvers and measurements.
Use the calculator
Try the related tool and calculate your own values instantly.
Open Microstrip Impedance Calculator