The microwave RF emission is actually very narrowband, though the frequency drifts all the time. Bluetooth uses FHSS so it will eventually go though, unless the

The microwave RF emission is actually very narrowband, though the frequency drifts all the time. Bluetooth uses FHSS so it will eventually go though, unless the noise is so powerful that it saturates the receiver. I'd post a screenshot from a HackRF-produced waterfall, but I don't have a microwave :). Some wifi controllers can measure energy in the spectrum and can be used to plot a simple waterfall.