Magnetron cathode cable microwave leakage protective device

Abstract

The invention relates to a magnetron and discloses a magnetron cathode cable microwave leakage protective device for preventing microwave leakage by use a coaxial structure and a wave-absorbing material. The magnetron cathode cable microwave leakage protective device comprises a junction surface, a cathode cable, a sleeve and a short-circuit plate; the junction surface is mounted at the starting end of the sleeve, while the short-circuit plate is mounted at the tail end of the sleeve; the cross section of the sleeve is circular; a cooling fin is mounted on the sleeve; the cathode cable penetrates through the short-circuit plate along the central axis of the sleeve to be connected with the junction surface; the wave-absorbing material is arranged between the sleeve and the cathode cable. The magnetron and discloses a magnetron cathode cable microwave leakage protective device has the beneficial effects that the microwave energy leaked by the magnetron cathode cable is absorbed thoroughly by the wave-absorbing material arranged between the sleeve and the cathode cable in the transmission process of the coaxial transmission line, the converted heat is dissipated to the surrounding space by the cooling fin, and therefore, the normal work of the coaxial line transmission system is guaranteed, the reliability of the protective device is improved and the microwave leakage is stopped.

Description

technical field [0001] The invention relates to a magnetron, in particular to a microwave leakage protection device for a magnetron cathode cable. Background technique [0002] Magnetrons are increasingly used in industrial, scientific and medical (IMS) research, and their fields of application continue to expand. Especially in industrial heating applications with the characteristics of continuous wave, high power, and long time, the microwave leakage of the magnetron will have a fatal impact on the control circuit. In addition, in order to ensure the long-term effective operation of electronic products and the electromagnetic protection of the environment, countries have formulated strict electromagnetic compatibility (EMC) standards for electronic products, so the electromagnetic compatibility (EMC) performance of magnetrons must be optimized. The leakage power of the cathode lead wire of the magnetron cannot be ignored. At present, there are two ways to deal with this p...

AI Technical Summary

Problems solved by technology

But these two structures have certain defects: for the λ / 4 choke sleeve, because the microwave generated by the magnetron has a certain discrete range, the condition of a quarter wavelength cannot be strictly satisfied, and when the choke sleeve When the microwave energy in the cylinder cannot be consumed in time (over its capacity), the microwave will also leak out

[0003] At present, the method of directly grounding metal connecting wires is generally used for filtering, so that microwaves will inevitably radiate from the grounding wire into the air.

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