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Positive feed Cassegrain antenna for high-power microwaves

A Cassegrain antenna, high-power microwave technology, which is applied in the direction of antenna, antenna grounding switch structure connection, antenna support/installation device, etc., can solve the problem of insufficient power capacity of high-power microwave feed-forward Cassegrain antenna, It is not conducive to the problems of miniaturization and uncompact structure, and achieves the effect of increasing power capacity, reducing length and reducing power density.

Active Publication Date: 2021-07-16
NORTHWEST INST OF NUCLEAR TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to propose a forward-fed Cassegrain antenna for high-power microwaves, which solves the technical problems of insufficient power capacity and uncompact structure of the forward-fed Cassegrain antenna for high-power microwaves, which is not conducive to miniaturization

Method used

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  • Positive feed Cassegrain antenna for high-power microwaves
  • Positive feed Cassegrain antenna for high-power microwaves
  • Positive feed Cassegrain antenna for high-power microwaves

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Embodiment 1

[0041] The present invention will be further described below in conjunction with the examples. A forward-fed Cassegrain antenna for Ku-band high-power microwave, with a power capacity of 1GW, and its structure is as follows figure 1 and figure 2 shown. The diameter of the main reflector is 1000mm, the diameter of the secondary reflector is 150mm, the diameter of the feed source is 80mm, the thickness of the conical cylinder is 10mm, and the EPO material is used. The surface is hardened and plated with 100μm thick SiN 2 coating, the longitudinal dimension of the antenna is 300mm. The electric field distribution of the tangent plane of the antenna is as follows Figure 5 As shown, the presence of the dielectric cone hardly disturbs the electric field distribution of the antenna. The electric field distribution on the feed port surface is as follows: Figure 6 As shown, the maximum electric field strength is 221kV / cm, which is much higher than the dielectric breakdown thres...

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Abstract

The invention belongs to the technical field of high-power microwave transmission and emission, and provides a positive feed Cassegrain antenna for high-power microwaves. The positive feed Cassegrain antenna comprises a main reflecting surface, an auxiliary reflecting surface, a feed source and a medium conical barrel, wherein the medium conical barrel is placed between the feed source and the auxiliary reflecting surface and is of a conical barrel structure, the medium conical cylinder is respectively connected with a feed source opening surface flange of the feed source and an outer edge flange of the auxiliary reflecting surface through flanges, sealing grooves are carved in the flanges, and sealing rings are placed in the sealing grooves for sealing, so that the feed source and the auxiliary reflecting surface are ensured to work in a vacuum environment, normal transmission of electromagnetic waves is realized by adopting the medium conical cylinder, and vacuum isolation between the feed source and the auxiliary reflecting surface and external atmosphere is realized. By the adoption of the structure, the feed source opening face does not serve as a vacuum and atmosphere interface any more, the opening face field intensity does not need to be reduced by increasing the area of the feed source opening face, the area of the feed source opening face can be reduced, and meanwhile the longitudinal size of the feed source and the distance between the feed source and the auxiliary reflection face are reduced.re High-power microwaves can be transmitted by using a conventional Cassegrain antenna (for low-power transmission), the power capacity of the invented antenna is improved by 30%, and the longitudinal total length of the antenna is reduced by 20%.

Description

technical field [0001] The invention belongs to the technical field of high-power microwave transmission and emission, and relates to a forward-feed Cassegrain antenna for high-power microwave. Background technique [0002] The commonly used high-power microwave transmission system in China is generally a three-mirror beam waveguide feed-forward Cassegrain antenna or a feed-fed feed-forward Cassegrain antenna. [0003] High-power microwave generators are vacuum devices and need to work in a vacuum environment. The three-mirror beam waveguide forward-fed Cassegrain antenna is used as the microwave transmission and emission mechanism, and is connected behind the high-power microwave generator. One side of the beam waveguide is connected to a high-power generator and is in a vacuum environment. One side is connected to the atmosphere, and a dielectric window is used as the partition structure of these two parts. The dielectric window is the bottleneck of the power capacity o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/50H01Q1/36H01Q1/12H01Q19/19
CPCH01Q1/50H01Q1/36H01Q1/12H01Q19/19
Inventor 朱晓欣苏建仓滕雁李小泽谭维兵崔新红杨德文
Owner NORTHWEST INST OF NUCLEAR TECH
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