Device for generating hyperfrequency waves having a cathode whereof each end is connected to a voltage source

A device for generating hyperfrequency waves, of the magnetron type, comprising:

• a cathode, elongated in a longitudinal direction (Z), between first and second longitudinal ends,
• an anode, surrounding the cathode and comprising an inner surface oriented toward the cathode and delimiting a plurality of resonant cavities distributed along the periphery thereof, the anode also comprising an outer surface, opposite the inner surface, and
• a voltage source, to establish a potential difference between the cathode and the anode,
• the cathode being electrically connected to the voltage source by each of its longitudinal ends, to bring those two ends to substantially equal electric potentials, and in that the generating device comprises a device for adjusting the longitudinal length (l) of each resonant cavity, the longitudinal length (l) being defined between the longitudinal ends of the resonant cavity, the adjusting device comprising at least one mobile element defining a longitudinal end of at least one resonant cavity.