microwave oven theory

can any one help me to know any info about the design constrains in microwave ovens i want to make a small one for my graduation project
thanks

Microwave ovens are pretty dangerous to make, for 2 reasons:

1) they use high voltage power supplies that can be lethal
2) they may leak high power microwaves out of the door (if poorly designed), which are dangerous to eyesight

How about picking a different design project?