Patent ID: 6918366

Claim:
A device for an ignition of an air-fuel mixture in an internal combustion engine using a high-frequency electrical energy source, comprising: a coaxial waveguide structure forming a resonator chamber, into which a high-frequency electrical energy is able to be fed at a predefined coupling-in location at one end of an inner conductor of the waveguide structure, wherein the waveguide structure extends with the other end of the inner conductor into a respective combustion chamber of a cylinder of the internal combustion engine, a microwave plasma being able to be generated at the other end by a high-voltage potential, and wherein the coupling-in location is formed in such a way that a feed line is able to be coupled on coaxially, using which a supply of the electrical energy takes place through a coaxial insulation in an outer wall of the waveguide structure into the resonator chamber.