What frequency does a microwave operate on?

Following international conventions, microwave ovens at home or in restaurants operate at frequencies of about 2.45 GHz , i.e. λ = 12. 23 cm. Figure 1 depicts a typical microwave oven (many details can be found in [1–3]). Microwaves are generated in a magnetron which feeds via a waveguide into the cooking chamber.

You will have to change the magnetron and change the capacitor for a higher capacitance . Most lower wattage microwaves have lower capacitance capacitors. Or you can ditch the Microwave oven transformer and capacitor idea together. You can replace it with a panasonic DC to AC high voltage Power Converter.

The frequency is tuned to the cyclotron resonance of the electrons in the magnetic field , anywhere between 2–200 GHz, hence it is often referred to as Electron Cyclotron Resonance Heating (ECRH).

A microwave oven generates its radiation via a magnetron which is based on a resonant cavity. Unless the cavity has been damaged in some way, there is not really any way for it to change its output frequency .13 Eki 2020