Impedance calculator for asymmetric differential stripline

In summary, the conversation is about finding an online calculator to determine the impedance of an asymmetric differential stripline. The person already has one tool but wants to cross-check with another. They are unsure if the calculation will be accurate for both broadside and edge coupled topology. They are hoping for someone with more expertise to provide a solution or suggestion.
  • #1
yungman
5,755
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Hi

Anyone know of an online asymmetric differential stripline impedance calculator? I already have the Saturn pcb design tool kit. I just want to find a second one to cross check the result. My experience is I have seen two calculators gave different results.

Thanks
 
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  • #2
Broadside or edge coupled topology? (Not that I have either.)

You may need to calculate for yourself. A shortcut might be to find the difference between the symmetric and asymmetric unbalanced line and see if it can be replicated. This is possibly true for the edge coupled; not so much for the broadside.

Anyway, this post is mostly a bump in hopes some smarter engineer comes along.
 

FAQ: Impedance calculator for asymmetric differential stripline

1. What is an impedance calculator for asymmetric differential stripline?

An impedance calculator for asymmetric differential stripline is a tool used by scientists and engineers to determine the characteristic impedance of a stripline with unequal trace widths or gaps. It takes into account the asymmetrical nature of the stripline, which affects its impedance.

2. How does an impedance calculator for asymmetric differential stripline work?

The calculator uses the dimensions and material properties of the stripline, such as trace width, gap width, and substrate dielectric constant, to calculate the characteristic impedance. It takes into account the asymmetry of the stripline by using equations that consider the difference in signal paths and return currents for each differential signal.

3. Why is it important to accurately calculate the impedance of an asymmetric differential stripline?

The characteristic impedance of a stripline affects the performance of high-speed signals, such as those used in telecommunications and data transmission. By accurately calculating the impedance, engineers can ensure that the signals will propagate properly and avoid issues such as signal reflections and crosstalk.

4. What are the limitations of an impedance calculator for asymmetric differential stripline?

The calculator assumes ideal conditions and may not account for external factors that can affect the impedance, such as parasitic capacitance or inductance. It is also limited to striplines with simple geometries and may not be applicable for more complex structures.

5. Are there any alternative methods for calculating the impedance of an asymmetric differential stripline?

Yes, some engineers may choose to use simulation software, such as electromagnetic field solvers, to accurately calculate the impedance of an asymmetric differential stripline. However, these methods may require more advanced knowledge and resources compared to using an impedance calculator.

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