Can instrumentation amplifiers be useful in mixer design? Or other microwave designs?

[Terminator3]

I just searched for new OpAmps and found this new word for me "Instrumentation amplifier". Are they used in microwave designs? I guess mixers or maybe power meters, as instrumentation amplifiers "particularly suitable for use in measurement and test equipment" (wikipedia)..

 

[FvM]

If you continue reading, you'll surely find application circuits that demonstrates typical usage of instrumentation amplifiers.

They have mostly bandwidths below 1 MHz and are rarely suitable for RF circuits. Amplifying DC quantities in a RF instrument, e.g. a dectctor voltage can be a reasonable application.

Besides instrumentation amplifiers, there's also a category of fully differential amplifiers, some with > GHz bandwidth which may well serve RF applications.

 

[Borber]

Mixer is nonlinear device while amplifier is linear.
https://en.wikipedia.org/wiki/Frequency_mixer
https://en.wikipedia.org/wiki/Amplifier

Term mixer is also used to describe adding two or more signals usually in audio. That is done with OPAs.