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Re: Building Pi Network with VNA given values


 

On Thu, Mar 13, 2025 at 11:20 PM, David McQuate wrote:


Usually a network Q value is first chosen.
You can actually calculate the values of an L-Network's two components without knowing Q. It is sufficient to know just the value of the load impedance and the impedance you want to transform that load to, e.g. 50 ohms.

You can find the equations to calculate the component values for transforming a complex impedance to 50 ohms here:


And this blogpost contains a more general form of the above equations, allowing you to transform a complex impedance to any other complex impedance, not just to 50 ohms:


The equations are complicated, but you can download an EXCEL spreadsheet to calculate them here:


Best,

Jeff, k6jca

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