Rotating piston internal combustion engine

A rotating piston internal combustion engine, comprising:

• a housing which includes a housing wall that forms an operating chamber;
• a rotatable rotating piston that is arranged in the housing and extends through the operating chamber and moves edges of the rotating piston along a portion of the housing wall that forms a running surface;
• a portion of the operating chamber that functions as a combustion chamber together with a combustion chamber wall so that a fuel that is arranged in the operating chamber is ignitable;
• at least one microwave window that is arranged in the combustion chamber wall;
• a device configured to inject microwaves into the combustion chamber of the operating chamber;
• and
• uneven local geometric metal structures that are arranged in the combustion chamber wall,
• wherein the device configured to inject microwaves is arranged at a side of the at least one microwave window which side is oriented away from the combustion chamber,
• wherein the device configured to inject the microwaves is separated by the at least one microwave window from the combustion chamber,
• wherein at least the combustion chamber wall is at least partially made from a material that is permeable for microwaves and suitable for combusting fuel in the combustion chamber, and
• wherein the uneven local geometric metal structures reflect microwaves that were initially reflected out of the combustion chamber back in into the combustion chamber in a concentrated or scattered manner.