signal integrity

Stripline Impedance

Computes stripline transmission line parameters from dielectric permittivity, trace height, thickness, and width using closed-form approximations.

Inputs

Relative Permittivity of the Dielectric

Relative permittivity (dielectric constant) of the PCB substrate — FR4 ≈ 4.5

Height of Trace(mm)

Distance from trace centre to the nearest ground plane in millimetres

Trace Thickness(mm)

Thickness of the copper trace in millimetres

Width of the Trace(mm)

Width of the copper trace in millimetres

⚠Relative permittivity must be greater than zero

Characteristic Impedance—ΩCharacteristic impedance of the stripline in ohms

Capacitance Per Unit Length—F/mDistributed capacitance per unit length in farads per metre

Effective Propagation Delay—s/mPropagation delay per unit length in seconds per metre

Inductance Per Unit Length—H/mDistributed inductance per unit length in henries per metre