Symmetric Stripline Impedance Calculator

Calculate characteristic impedance, capacitance, propagation delay, and inductance of a symmetric stripline based on dielectric permittivity, height, trace thickness, and width.

Inputs

Substrate Dielectric (ε)

Dielectric Height (h)

Trace Thickness (t)

Width of the Trace (w)

Results

Characteristic Impedance (Z)

0Ohms (Ω)

Capacitance per Unit Length (C)

0F/m

Effective Propagation Delay (P)

0s/m

Inductance per Unit Length (L)

0H/m

Formulas

Characteristic Impedance

Z = \frac{60}{\sqrt{\varepsilon}} \cdot \ln\left(\frac{1.92 \cdot (2h + t)}{0.8w + t}\right)

Capacitance per Unit Length

C = \frac{5.55 \times 10^{-11} \cdot \varepsilon}{\ln\left(\frac{3.81h}{0.8w + t}\right)}

Effective Propagation Delay

P = 3.34 \times 10^{-9} \cdot \sqrt{\varepsilon}

Inductance per Unit Length

L = C \cdot Z \cdot Z

Where,

ε=Substrate Dielectric ()

h=Dielectric Height (mm)

t=Trace Thickness (mm)

w=Width of the Trace (mm)

Z=Characteristic Impedance (Ohms (Ω))

C=Capacitance per Unit Length (F/m)

P=Effective Propagation Delay (s/m)

L=Inductance per Unit Length (H/m)