Note: Units do not matter for this calculation as long as they
are consistent.
Reference: R. Simons, "Coplanar Waveguide Circuits, Components,
and Systems", Wiley, 2001, pp. 15-21.
For more information on CPW,Click Here
Additional notes: this calculation assumes that there is no ground-plane
underneath the dielectric, and below it is free space or air.
Try this calculator on sourceforge for grounded CPW:
http://wcalc.sourceforge.net/cgi-bin/coplanar.cgi
Many equations have been applied to
CPW impedance calculations to model its behavior. The equations we used
are not the most accurate and the results should be considered approximate, for
example, the calculation does not take into account the thickness of the strips.
For critical designs you should consider using 3D electro-magnetic analysis of CPW.
Interested in updating these calculators and adding reference material? Contact
webmaster@microwaves101.com.