Microwave oven and assembling method thereof

A method for assembling a microwave oven, comprising the steps of:

• providing a muffle having a plurality of walls and configured to define an internal cavity for housing food;
• providing a radiofrequency supplying assembly that includes a radiofrequency generator and at least one waveguide configured to guide radiofrequency waves from the radiofrequency generator into the internal cavity via an access opening provided on one of the plurality of walls;
• and
• coupling the radiofrequency supplying assembly to the muffle via a mounting flange arranged on an outer side of the muffle in correspondence to the access opening;
• and
• providing a protective shield that prevents at least one of vapors and fumes generated in the internal cavity from gaining access to the waveguide without substantially interfering with the passage of the radiofrequency waves from the waveguide to the internal cavity.

A method for assembling a microwave oven, comprising the steps of:

• providing a muffle having a plurality of walls and configured to define an internal cavity for housing food;
• coupling a radiofrequency supplying assembly to the muffle via a mounting flange arranged on an outer side of the muffle;
• and
• providing a protective shield that prevents at least one of vapors and fumes generated in the internal cavity from gaining access to a waveguide of the radiofrequency supplying assembly without substantially interfering with the passage of radiofrequency waves from the waveguide to the internal cavity.