#### div

##### Member level 3

I am looking for some closed form

equation of microstrip gap.

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It can be modeled as

a Pi network with three Caps.

Two C1 as shunt cap to model the fringing field

and C2 as the cap cross the gap.

I read some paper about using integration

equation, variational method ... to solve

the problem.

But as a l@zy guy as I always am, I am wondering

is there any closed form equation for C1 & C2 as a functionof

1)distance of gap

2) hight of dielectic

3) width of the edge

4) dielectric constant ( if we still call it constant) or permittivity.

5) thickness of metal

6) you name it.

Regards

Div