A metal grid array type c-band virtual cathode oscillator filled in a waveguide

A metal grid and metal filling technology, which is applied to the cathode of the transit time type electron tube, the transit time type electron tube, the cooling method of the transit time type electron tube, etc. Low frequency, virtual cathode is difficult to repeat frequency emission, etc., to achieve the effect of enhancing microwave conversion efficiency, reducing self-magnetism, and structural impact resistance

Active Publication Date: 2021-10-29
INST OF APPLIED ELECTRONICS CHINA ACAD OF ENG PHYSICS
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  • Abstract
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Problems solved by technology

[0004] In the actual application of ordinary virtual cathodes, the anode generally uses metal mesh to guide the cathode to emit high-current electron beams. In this process, due to the impact of strong current and the increase of transient energy, the anode mesh is extremely prone to ablation
As a result, it is difficult for the virtual cathode to carry out repeated frequency emission, and the damage of the anode network affects the performance index of the microwave output, making the microwave power output efficiency low

Method used

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  • A metal grid array type c-band virtual cathode oscillator filled in a waveguide
  • A metal grid array type c-band virtual cathode oscillator filled in a waveguide

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Embodiment 1

[0028] Such as figure 1 As shown, a metal grid array type C-band virtual cathode oscillator filled in a waveguide in this embodiment includes a metal circular waveguide, and a cathode coaxial with the metal circular waveguide is arranged at one end of the metal circular waveguide, and the electron beam emitting end of the cathode is a circular surface ; A first metal grid and a metal grid array are sequentially arranged in the metal circular waveguide along the electron beam transmission direction, and the metal grid array is composed of multiple groups of metal grids periodically arranged;

[0029] The distance between the first metal grid and the metal grid array is slightly larger than the distance between the first metal grid and the cathode; the distance between the first metal grid and the metal grid array is 1.65cm, and the metal grid in the metal grid array The arrangement period is 1.79cm; the first metal grid and each group of metal grids in the metal grid array are ...

Embodiment 2

[0033] The difference between this embodiment and Embodiment 1 is that the arrangement period of the metal grids in the metal grid array is 3.57 cm, and the microwave conversion efficiency is 17%.

Embodiment 3

[0035] The difference between this embodiment and Embodiment 1 is that the arrangement period of the metal grids in the metal grid array is 2.68 cm, and the microwave conversion efficiency is 18%.

[0036] In summary, the metal grid array type C-band virtual cathode oscillator filled in the waveguide of the present invention has a shock-resistant structure and fast heat dissipation, which is very suitable for electron beam repetition frequency emission; the self-magnetism of the beam is reduced, The stability of the virtual cathode is improved; the microwave conversion efficiency of the virtual cathode is enhanced.

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Abstract

The invention discloses a metal grid array type C-band virtual cathode oscillator filled in a waveguide, which comprises a metal circular waveguide, a cathode coaxial with the metal circular waveguide is arranged at one end of the metal circular waveguide; A metal grid and a metal grid array, the metal grid array is composed of multiple groups of metal grids arranged periodically; the distance between the first metal grid and the metal grid array is slightly smaller than the distance between the first metal grid and the cathode Large; the distance between the first metal grid and the metal grid array is 1.65cm, and the arrangement period of the metal grid in the metal grid array is 1 / 4 to 1 / 2 of the wavelength of the radiated microwave; each group of metal grids consists of a diameter It consists of 11 metal sheets arranged at intervals; the cathode emits electron beams that are transmitted in the oscillator, and the radiation generates C-band high-power microwaves with a wavelength of 7.14cm. The metal grid array type C-band virtual cathode oscillator filled in the waveguide of the present invention has the advantages of impact resistance, fast heat dissipation, and is suitable for electron beam repetition frequency emission.

Description

technical field [0001] The invention relates to a metal grid array type C-band virtual cathode oscillator filled in a waveguide, which belongs to the technical field of high-power microwave devices. Background technique [0002] High-power microwave refers to electromagnetic waves with a frequency in the range of 1-300 GHz and a peak power above 100 MW. With the development of pulse power technology and plasma physics, high-power microwave technology has also developed rapidly, especially in the development of high-power microwave sources has made great progress, there have been many different types of high-power microwave source. In some application fields, it is necessary to reduce the volume and weight by removing the external magnetic field system, so as to realize the miniaturization of high-power microwave devices, such devices include virtual cathodes, magnetic insulated wire oscillators, separated cavity oscillators and super post-accelerator tubes. Virtual cathode...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J23/00H01J23/04H01J23/24H01J25/02
CPCH01J23/005H01J23/04H01J23/24H01J25/02
Inventor 张运俭丁恩燕
Owner INST OF APPLIED ELECTRONICS CHINA ACAD OF ENG PHYSICS
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