Microwave feeding of an oven cavity

A method for feeding microwaves into the cavity of a microwave oven through an elongated coupling slot (1) including a main part (5) having a cross-dimension (b), which is fed by an external waveguide (13, 14), employing a coupling slot whose effective width (as) is significantly smaller than the width (av) of the waveguide, characterised by adapting the coupling slot (1) to the waveguide and the desired cavity excitation by connecting slot extensions (6, 7) whose cross-dimension is substantially smaller than cross-dimension (b) to the respective ends of the main part (5) of the coupling slot (1) substantially in the plane of the coupling slot (1).

A method for feeding microwaves into the cavity of a microwave oven through an elongated coupling slot (1) including a main part (5) having a cross-dimension (b), which is fed by an external waveguide (13, 14), employing a coupling slot whose effective width (as) is significantly smaller than the width (av) of the waveguide, characterised by adapting the coupling slot (1) to the waveguide and the desired cavity excitation by connecting slot extensions (6, 7) to the respective ends of the main part (5) of the coupling slot (1) further characterised by giving the slot extensions (6, 7) a cross-dimension substantially smaller than cross-dimension (b) and an extent such that together with the width (as) of the main part (5) of the coupling slot (1) the coupling slot (1) and slot extensions (6, 7) essentially correspond to the width (av) of the connected waveguide.