Microwave oven in electricity belongs to the radio?

First of all, the principle of the microwave oven is through the high-speed vibration of electrons in the magnetron to produce a fixed frequency of electromagnetic waves, its frequency and the vibration frequency of hydrogen atoms is the same, so cause *** vibration, to achieve inside and outside together with the purpose of heating the food, due to its frequency in the microwave section of the electromagnetic waves, so it is called a microwave oven. And the original meaning of radio is, a wireless transmission of electrical energy, and microwave ovens use exactly this way to heat food, so it should belong to the radio. But as for that discipline, that should belong to the physical discipline, electromagnetism category.