Hello Frank,
> Does anyone have a impedance formula for "Edge coupled surface
microstrip"?
>Any help would be appriciated.
Take a look at the free calculator from HP at
http://www.hp.com/HP-COMP/rf/hprfhelp/design/appcad.htm
, just a small tip, enter all values with at least one decimal, e.g., don't
enter 2 , enter 2.0 .
Good luck,
Paulo Egon