A MICROWAVE OVEN

摘要

A microwave oven comprising a cavity (3) in which a material can be placed for heating and a magnetron (14) for generating a microwave. The microwave oven further comprises an electromagnetic element (21) adapted to interact with microwaves into the cavity and a control unit (17) that provides a control signal to the electromagnetic element for modifying an impedance of the electromagnetic element during time of heating.