[Phys-L] Why didn't I think this. (mirror dispersal of microwave energy[1])

[bernard cleyet <bernard@cleyet.org>]

Costco advertises an oven with “concave reflection technology” which claims to heat the object uniformly.  After an unconscionably long time, I found the technology description.  Instead of a rotating platform or a fan, the oven uses (a) concave mirror(s).  Here’s the patent: 


https://patents.google.com/patent/US5919391A/en  


bc intends to purchase the Daewoo oven from Costco (only $65 delivered)  


https://www.costco.com/.product.100300673.html?&EMID=B2C_2020_0203_SmallSpaces  


p.s.  Our current oven stratifies the energy, so one must stir the coffee otherwise the top burns and the bottom is cool.  If it were inverted ….  


[1]  Especially since I've shown and told (at AAPT section and SCPTA meetings ) microwave optics.