buenos
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offset stripline calculator
Hi
I found some equations on the internet, and calculators, which use them.
But i think the equations are not correct for offset striplines. only for symmetrical.
I think the equqtion should produce similar result to the microstrip equation when the plane separation is infinit, and should produce the original when symmetrical stripline with not infinit plane separation.
original:
Zdiff=2*Zse*(1-0.387*e^(-2.9*(d/(h1+h2))))
where h1 is one of the dielectric thicknesses, h2 is the other
new:
Zdiff=2*Zse*(1-0.387*k1*e^(-2.9*k2*(d/(2*h))))
compensating with 2 modifier variables:
and k1=1+0.3823*(1-e^((-h2/h1)-1))
and k2=1-0.33794*(1-e^((-h2/h1)-1))
where h2>h1
the results are very different.
the calculator:
**broken link removed**
so, am i correct? or not?
Hi
I found some equations on the internet, and calculators, which use them.
But i think the equations are not correct for offset striplines. only for symmetrical.
I think the equqtion should produce similar result to the microstrip equation when the plane separation is infinit, and should produce the original when symmetrical stripline with not infinit plane separation.
original:
Zdiff=2*Zse*(1-0.387*e^(-2.9*(d/(h1+h2))))
where h1 is one of the dielectric thicknesses, h2 is the other
new:
Zdiff=2*Zse*(1-0.387*k1*e^(-2.9*k2*(d/(2*h))))
compensating with 2 modifier variables:
and k1=1+0.3823*(1-e^((-h2/h1)-1))
and k2=1-0.33794*(1-e^((-h2/h1)-1))
where h2>h1
the results are very different.
the calculator:
**broken link removed**
so, am i correct? or not?