#337: Use a NanoVNA to measure input impedance and gain of a small-signal RF amplifier @w2aew

w2aew | #337: Use a NanoVNA to measure input impedance and gain of a small-signal RF amplifier @w2aew | Uploaded July 2021 | Updated October 2024, 3 hours ago.
This video shows how to measure the input impedance and gain of a small-signal RF amplifier - including the use of an attenuator to keep the amp in it's linear range and also to not overdrive the NanoVNA. This stems from a recent conversation with Bill N0CQR (SolderSmoke podcast). The amplifier featured is a "Termination Insensitive Amplifier" or TIA that is described in paper by Wes Hayward (W7ZOI) and Bob Kopski (K3NHI) - see links below:

Soldersmoke blog:
soldersmoke.blogspot.com

Wes's webpage: w7zoi.net
The TIA paper: w7zoi.net/bidirectional_matched_amplifier.pdf
Papers on the theory and models of transistor amps:
w7zoi.net/fba_with_simple_model.pdf
w7zoi.net/transistor_models_and_the_fba.pdf

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