signal integrity

Microstrip PCB Differential Impedance

Computes the differential impedance of a coupled microstrip pair using: Zdiff = 2 × Z0 × (1 - 0.48 × e^(-0.96 × s/h)), where Z0 is the single-ended characteristic impedance, s is the spacing between traces, and h is the dielectric height.

Inputs

Characteristic Impedance(Ω)

Single-ended characteristic impedance of each trace in ohms

Space Between Traces(mm)

Edge-to-edge spacing between the two traces in millimetres

Height of Trace(mm)

Height of the dielectric substrate below the trace in millimetres

Results

Differential Impedance0.000e+0ΩDifferential impedance of the trace pair in ohms