Magnetron with uniform field distribution

Abstract

The invention relates to a magnetron with uniform field distribution, which comprises an anode part and a cathode part; the anode part comprises an anode tube, anode blades which are arranged on the surface of the inner wall of the anode tube in a radial shape, a large cross ring chain, a small cross ring chain and an output antenna; the cathode part comprises a spiral filament which is wound on a central support rod component; a pair of conical magnetic poles is symmetrically arranged in the axial direction of the anode part; the number of the anode blades is even, and the anode blades are integrated with the anode tube to form an even number of anode cavities with fan-shaped cavities; the large cross ring chain and the small cross ring chain are alternatively connected with the anode blades which are arranged in the radial shape electrically. According to the invention, the anode blades are uniformly distributed in the circumferential direction and angle, so that the blades are prevented from dislocating along the axial direction of the anode tube, the high-frequency field distribution in an interactive space between the anode part and the cathode part is very uniform, fewer interference oscillation modes other than a pi mode are excited in the magnetron, the oscillation spectrum of the pi mode is good, the oscillation of the magnetron is stable, and the microwave output efficiency is high.

Description

technical field [0001] The utility model relates to a magnetron, in particular to a magnetron with a uniform high-frequency field distribution in the interaction space between an anode part and a cathode part, which is used for household microwave ovens and industrial microwave equipment with an oscillation frequency of 5.8 GHz. Background technique [0002] Magnetron is a vacuum electron tube that generates microwaves. Because of its high oscillation efficiency and high microwave output power, it is not only widely used in household microwave ovens, but also widely used as a microwave source for microwave processing equipment such as industrial heating and chemical processing. With the development of microwave technology, higher frequency magnetrons such as continuous wave magnetrons in the 5.8GHz frequency band are needed as microwave power sources to improve the microwave-to-heat conversion efficiency in the process of dielectric material processing, thereby improving prod...

AI Technical Summary

Problems solved by technology

However, the existing method of assembling the anode cylinder and blades may easily cause the angular distribution of the anode blades in the circumferential direction to be uneven, and the blades to be misaligned along the axial direction of the anode cylinder, etc., so that the high-frequency field in the interaction space between the anode part and the cathode part The distribution is uneven, and the interference oscillation modes other than the π mode are excited in the tube, so that the π mode oscillation spectrum is poor, and in serious cases, the oscillation of the magnetron is unstable and the microwave output efficiency is low.

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