Sealing arrangement in a microwave oven

A sealing arrangement in a microwave oven having an oven cavity defined by side walls of electrically conductive material and conductive wall portions defining a substantially rectangular access opening, a door for closing said access opening including a frame extending around the door and a perforated sheet covering the space situated inside the frame, a microwave energy seal comprising a quarterwave choke located in the rim portion of the door and having an entrance opening in the rim portions of the door lying opposite to and spaced apart from said conductive wall portions of the cavity, the door frame comprising an integral profile having a substantially U-shaped section of an electrically conductive material with the base of the U, as seen in a sectional view, facing inwardly to the inside of the cavity and with the outer leg of the U forming a portion of the rim portions of the door and being shorter than the inner leg of the U, said perforated sheet being arranged in a plane with the outer end of the inner leg, and means electrically connecting said sheet with said end of the longer inner leg with the sheet extending beyond the inner and the outer legs of the U so that the entrance opening to the choke is formed by the intermediate space between the sheet and the outer shorter leg of the U-shaped profile of the door frame.