Signal Integrity TUTORIAL

Microstrip Impedance Calculator

The Calculator Calculates the values of the Characteristic Impedance, Capacitance per unit length and propogation speed.

The Calculator assumes that
1. 0.1< W/H < 3.0 2. 1 < er < 15

Note that
1. Increasing W decreases Zo. 2. Increasing H increases Zo. 3. Increasing t decreases Zo, although it has small effect on Zo.

Select the dimension unit of the microstrip: mm mils
  (Dielectric thickness) : mm mils
  (Trace thickness) : mm mils
  (Trace width) : mm mils
er (Relative permittivity) :
(Characteristic impedance):


Co    (Capacitance):

pF/cm pF/inch

Tpd  (Propagation delay time):

psec/cm psec/inch

If you like this tutorial, you may like to get the book . You may also check it on amazon, it is available. .