Metamaterial-based low-frequency-band slow wave structure

A technology of slow wave structure and metamaterials, applied in the direction of the circuit components of the time-of-flight electron tube, etc., can solve the problem of uneven distribution of the axial electric field

Active Publication Date: 2021-05-18
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0008] A scheme to improve the slow-wave structure of prior art 1 is proposed to overcome the problem of uneven axial electric field distribution in prior art 1, and to improve the beam wave of metamaterial slow-wave structures in the process of high-power microwave generation The interaction efficiency is optimized to obtain a metamaterial slow-wa...

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  • Metamaterial-based low-frequency-band slow wave structure
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[0035] The accompanying drawings constituting a part of this application are used to provide further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention.

[0036] figure 1 It is a schematic diagram of an L-band metamaterial-based slow-wave structure in prior art 1 in the background introduction. The structure is composed of a metamaterial resonant unit 1, a metamaterial resonant unit 2 and a circular waveguide 3. The metamaterial resonant unit 1 and the metamaterial resonant unit 2 are arranged orthogonally to each other to form a single-period slow-wave structure, and multiple slow-wave structures are arranged periodically along the Z direction and embedded in the circular waveguide 3; there are two rectangular openings on the outside of the inner ring , which are located at both ends of the inner ring re...

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Abstract

The invention relates to a microwave source device in the field of high-power microwaves, in particular to a metamaterial-based low-frequency-band slow wave structure which comprises a first metamaterial resonance unit, a second metamaterial resonance unit and a circular waveguide. The first metamaterial resonance unit and the second metamaterial resonance unit are in 45-degree rotation coupling arrangement to form a single period of the slow wave structure. The metamaterial-based low-frequency-band slow wave structurehas the following technical advantages that the metamaterial-basedslow wave structure can work below the cut-off frequency of the hollow metal circular waveguides with the same size, and has the advantage of transverse miniaturization; due to the sub-wavelength characteristic of the metamaterial, the slow wave structure is shorter in period and has the advantage of miniaturization in the axial direction; due to the local field enhancement effect of the metamaterial-based slow-wave structure, the slow-wave structure has higher coupling impedance, and a device has the advantage of higher beam-wave interaction efficiency; strong electromagnetic coupling between metamaterial slow wave structures is stronger in relativistic electron beam modulation, so that the device has shorter oscillation starting time.

Description

technical field [0001] The invention relates to microwave source devices in the field of high-power microwaves, and is a low-frequency slow-wave structure based on metamaterials. Background technique [0002] High power microwave source, as the place where high power microwave is generated, is the core device in high power microwave system. Its working principle is to use relativistic electron beams to interact with the eigenmodes of high-frequency structures to obtain high-power microwave radiation. [0003] Traditional low-frequency high-power microwave sources such as relativistic klystrons, magnetically insulated wire oscillators, transition devices, relativistic magnetrons, etc., generally have insufficient miniaturization due to the demand for guiding magnetic fields and other reasons, and the devices are relatively large And the problem of low beam-wave interaction efficiency. [0004] Metamaterials are a kind of artificially designed subwavelength structures, which...

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Application Information

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IPC IPC(8): H01J23/24
CPCH01J23/24
Inventor 令钧溥何宇放贺军涛孔祥天皮明瑶
Owner NAT UNIV OF DEFENSE TECH
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