Re: Asymmetric Stripline / Microstrip online calculators for impedance and velocity

On 5/20/2025 11:00 AM, Mike Perkins wrote:

On 20/05/2025 15:56, bitrex wrote:

On 5/20/2025 10:06 AM, Mike Perkins wrote:

On 20/05/2025 14:53, Mike Perkins wrote:

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I can find numerous calculators that provide impedance for the above structures, but are there any that give propagation velocity too?

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After numerous failed searches I found:
  https://www.multekpcb.com/calculators/
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I think the stripline would have to be pretty far off-center for the phase velocity to be much different than c/sqrt(Er); in pen-and-paper analysis to derive the relatively simple equations for characteristic impedance, the dominant propagation mode is considered to be TEM.
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If the geometry is so screwy that it can't be well-approximated by TEM the characteristic impedance equation is wrong, also.
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I don't know what "asymmetric microstrip" is..?

 I would hope the calculators cope with standard Stripline and Microstrip.
  I just needed details for Asymmetric Stripline and standard Microstrip.
 

In the asymmetric stripline calculator you posted the propagation delay is calculated from the relative permittivity of the substrate alone, just so you know it's not returning anything different for that than the standard one.