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replacing distributed with lumped

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kazim

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dear friends

i was designing a matching network in which i designed a open stub of value 185 ohm with 84 degree length.
now the problem is we could only fabricate up to like 65 ohm. i have been told to convert it to lumped component. when i placed its equivalent lumped element i achieve a very narrowband matching.
how should i place more lumped elements equivalent to that open stubs to obtain the matching i require.
 

Not sure without knowing more. Can you instead determine Zin for your stub, then solve for the phase length needed to give you that Zin with a 65ohm-width line? It shouldn't change the length too much.
 

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