A relativistic magnetron with tunable multi-antenna axial output

Abstract

The invention relates to a relativistic magnetron with tunable multi-antenna axial output, and belongs to the field of high power microwave technology, which includes an anode outer barrel, an anodeblock, a cathode and a tuning assembly; and the anode block includes a plurality of fan-shaped blades and a plurality of reentrant resonant cavities; the tuning assembly includes a tuning disk, a tuning screw and a plurality of movable nose cones; the head end of the movable nose cone is connected with an adjusting disc, the end of which is embedded in the re-entrant cavity; A fixed nose cone is arranged inside the reentrant resonant cavity, a gap is left between the fixed nose cone and the end of the movable nose cone to form a nose cone gap, the tuning screw pushes the adjusting disk to slide to change the axial length of the nose cone gap, The invention fully utilizes the internal space of the magnetron, does not increase the transverse size of the system and the magnet space, improvesthe lightness and miniaturization level of the system, can maintain high conversion efficiency in a wide tuning frequency range, and is suitable for a compact structure and frequency adjustable axialoutput high-power microwave system.

Description

technical field [0001] The invention belongs to the technical field of high-power microwaves, and in particular relates to a relativistic magnetron with tunable multi-antenna axial output. Background technique [0002] In the 1970s, with the development of pulse power technology and plasma physics and the potential application of high power microwave in directed energy weapons, particle acceleration, short pulse radar and other fields, high power microwave technology developed rapidly. There are different types of high-power microwave sources, mainly including: relativistic magnetron, relativistic klystron, gyrotron, virtual cathode oscillator, magnetic insulated wire oscillator, relativistic return wave tube, etc. Because high-power microwaves are generally generated by the interaction between high-current relativistic electron beams and high-frequency structures of high-power microwave devices, high-power microwave devices are one of the key components in the entire high-p...

AI Technical Summary

Problems solved by technology

For the radial tuning method, it has the following disadvantages: (a) the radial adjustment structure increases the lateral size of the system and may occupy the space of the magnet, which is not conducive to the light and small design of the system; (b) it is necessary to realize the adjustment of the radial size of all resonators Synchronous precision adjustment requires high control precision of the mechanical adjustment structure, and the system is relatively complicated

(c) It is difficult to achieve high beam conversion efficiency by using radially tuned resonant resonators in the current main high-efficiency RM axial output structures (such as diffraction output structures or full-cavity output structures), which limits high-power The system efficiency of the microwave source limits its miniaturization level

For axial tuning methods, such as filling tuning metal rods or media in the resonant cavity, the practical value is not high due to the narrow tuning range or power capacity limitation.

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