Microstrip Closed Form Equations

Hi, I am looking for a closed form expression for the characteristic impedance and effective dielectric constant for a microstrip line. I can imagine it is going to be something similar to the CPW(coplanar waveguide) equations involving the complete elliptic integral of the second kind.

Is this what you are looking for ?

From:http://en.wikipedia.org/wiki/Microst...stic_Impedance