The modules use both the RCWL-9616 and the BISS-0001 but it seems the schematics are all labeled BISS-0001. The parts values are different. He gives some good information about them. They operate at 3.5 and 3.98 GHz – the ones I have were advertised at 5 GHz. Also he shows his own version that uses a
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A good article about signal distortion in a Butterworth low pass opamp filter using C0G and X7R MLCCs. https://www.edn.com/signal-distortion-from-high-k-ceramic-capacitors/
This may be helpful when choosing the amount of capacitance for a certain unregulated AC power supply – the kind that uses an old fashioned transformer. It calculates one variable given the others. https://www.chipbuilder.com/full-wave-power-supply-ripple-calculator.html
Chrome won’t allow me to connect to the spectrum.ieee.org website because it’s saying it’s not private. I go to learn more and they don’t have any way to override the error message. I went here first to read the story and tried the link at the end to comment. https://spectrum.ieee.org/tech-talk/tech-history/silicon-revolution/decoding-the-innovation-delusion-nurturing-the-maintenance-mindset They asked in an article
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