This would likely suit your needs, as long as you don't need great accuracy and dynamic range. The designer was clever enough to find a way around the poor phase measurements of the AD8302 near 0 and 90 degrees... the accuracy of the whole system is problably limited by his directional coupler as much as the detector itself.Yes, but the purpose is to make a small portable device. Can you give any advice on connecting the signals to the AD8302 ?
I've also found something like this:
USB VNA
It's possible for mechanical transducers... but if you only want to find the resonant frequency of a transducer, then I doubt it will matter much. Only one way to find out though....Will the complex impedance be dependent on the excitation power?
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