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How to measure LNA impednace ?

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chihhao

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Assume a transceiver for mobile phone and its LNA is differential type.
You have a 2-port network analyzer.
How do you measure impedance of LNA for matching between LNA and SAW filter?
Thanks.
 

You can use the method explained in the attached paper to evaluate the differential impedance (for both LNA and SAW). Once you have a measure of it, you can design the matching network.
I hope it can help.
Mazz
 
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    bob886

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