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Date: Tue, 20 May 2025 10:56:15 -0400
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Subject: Re: Asymmetric Stripline / Microstrip online calculators for
 impedance and velocity
Newsgroups: sci.electronics.design
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On 5/20/2025 10:06 AM, Mike Perkins wrote:
> On 20/05/2025 14:53, Mike Perkins wrote:
>>
>> I can find numerous calculators that provide impedance for the above 
>> structures, but are there any that give propagation velocity too?
> 
> After numerous failed searches I found:
>   https://www.multekpcb.com/calculators/
> 

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.

If the geometry is so screwy that it can't be well-approximated by TEM 
the characteristic impedance equation is wrong, also.

I don't know what "asymmetric microstrip" is..?