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this post was submitted on 10 Oct 2025
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I understand what you're saying, I've just not seen one with any indication of a wave stirrer. They all just shoot the beams from the magnetron through a ceramic plate on the side if the microwave. The top interior of the microwaves I've used (even one ones from Samsung and LG) had no holes or vents. Maybe it's just an American thing?
I've never used or dissassembled an American microwave, so wouldn't know about anything American-specific.
Having a ceramic plate at the end of the wave guide isn't evidence that there's not a wave stirrer on the other side of the plate or part way along the wave guide. As far as the microwaves are concerned, the ceramic plate is a hole, though, because (unless the manufacturer selected a stupid material), it should be about as transparent to microwaves as the air is.