Microwave Leakage: How Sub-Wavelength Radiation Escapes

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Sub-wavelength radiation can escape a microwave oven despite the door slit being under 1 cm wide due to the principles of polarization and the design of the oven as a Faraday cage. The discussion highlights that while a microwave oven reflects radiation from various angles, the specific dimensions of slits and openings can lead to leakage beyond typical rates. The relationship between the wavelength of the radiation and the size of the openings is complex, as leakage is a continuous function influenced by the separation of conductive paths. The inquiry stems from a need to develop solutions for leaky microwave ovens. Understanding these factors is crucial for addressing microwave safety and improving appliance design.
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How can sub-wavelength (about 12 cm./2.45GHz) radiation escape a microwave oven door slit-under 1 cm. wide. Why not a Faraday cage?
 
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Probably polarization, but I'm not sure - where is this question coming from?
 
Coming from M.Lepselter at : mplep@btlfellows.com. Is that your question?
I thought you might have a plasmon answer but polarization is too broad an answer. The box is reflecting from all angles and a 2.45GHz photon is still 12 cm.
 
I don't mean who, I mean what is the purpose of this question - it is very specific.
 
I am developing a band-aid for many leaky microwave ovens.
 
A microwave oven is a Faraday cage. The leak from a door slit will exceed the typical leak rate from the window when the size of the slit exceeds the distance between rulings (mesh size) on the window. You can't simply compare the wavelength to the opening and use that as a hard limit to determine whether or not there will be leakage. There is always some leakage and it is a smooth function of the wavelength and separation between conducting paths.
 

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