An axially tunable relativistic magnetron

Abstract

The invention provides an axially tunable relativistic magnetron, which fully utilizes the internal space of the magnetron, does not increase the lateral size of the system, does not occupy the magnetspace, and improves the lightness and miniaturization level of the system. At that same time, because the radial dimension of the system is not changed in the tuning process, the influence on the magnetron impedance is small, and high conversion efficiency can be maintained in a wide frequency range. The axially tuned relativistic magnetron can be used in high power microwave systems with compactstructure and adjustable frequency.

Description

technical field [0001] The invention relates to the technical field of high-power microwaves, in particular to an axially tunable relativistic magnetron. Background technique [0002] High Power Microwave (HPM) refers to electromagnetic waves with a peak power greater than 100 MW and a frequency between 1 GHz and 300 GHz. It is a new research field developed with the development of pulse power technology, relativistic electronics and plasma physics since the 1970s. The high-power microwave source is mainly a device that uses relativistic electron beams to generate high-power microwave radiation, and is one of the key components in high-power microwave systems. Many applications require high-power microwave sources to maximize conversion efficiency and reduce system volume and weight. At the same time, in order to meet the application requirements in a wide frequency range, the high-power microwave source also needs to have the ability to tune the output microwave frequency...

AI Technical Summary

Problems solved by technology

[0004] At present, the RM tuning method is mostly realized by changing the radial dimension of the cavity of the slow wave structure, which has the following disadvantages: (1) The radial adjustment structure increases the lateral dimension of the system and may occupy the space of the magnet, which is not conducive to the miniaturization of the system Design; (2) In order to achieve synchronous and precise adjustment of the radial dimensions of all resonators, the control accuracy of the mechanical adjustment structure is relatively high, and the system is relatively complex; (3) The radially tuned slow wave structure and the current main high-efficiency RM axial output Structures (such as diffractive output structures or full-cavity output structures) combined are difficult to achieve high beam conversion efficiency, which limits the system efficiency of high-power microwave sources and thus limits their miniaturization level

Other tuning methods, such as filling tuning metal rods or media in the resonator cavity, are not of high practical value due to narrow tuning range or power capacity limitations.

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