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Microwave sealing window

A technology of sealing windows and microwaves, which is applied in the coupling device of time-of-flight electron tubes, the shell/container of time-of-flight electron tubes, etc., and can solve the problems of narrow frequency band, large loss, and steep standing wave ratio curve of sealing windows, etc. , to achieve good matching, increase the sealing area, and expand the effect of applicable range

Inactive Publication Date: 2019-05-17
NO 12 RES INST OF CETC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the VSWR curve of the sealed window in the prior art is steep, the frequency band is narrow, and there is a large loss

Method used

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  • Microwave sealing window
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Examples

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Embodiment 1

[0034] In the preferred implementation mode provided by the present invention, the sealing window of the comparative example is separately arranged, and a gradual transition part is added at the welding place between the circular waveguide and the rectangular waveguide, so as to obtain the sealing window in Example 1. Specifically, the thickness h of the ceramic window is 0.3 mm, the diameter R of the ceramic window is 3.2 mm, the first angle α of the first gradual transition portion is 65°, and the second angle α of the second gradual transition portion is 65°. °.

[0035] The standing wave ratio of the sealing window of the prior art of comparative example 1 and the standing wave ratio of the sealing window of the preferred embodiment of the present invention in embodiment 1 are simulated and calculated by HFSS electromagnetic simulation software, figure 2 It is the standing wave ratio VS frequency curve simulated by HFSS software in Comparative Example 1, wherein the absci...

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Abstract

The invention discloses a microwave sealing window. The microwave sealing window comprises a first window cylinder and a second window cylinder, and a round ceramic window encapsulated between the first window cylinder and the second window cylinder, wherein the first window cylinder comprises a first circular ring part and a first rectangular part, and a first gradual change transition part located between the first circular ring part and the first rectangular part. According to the sealing window provided by the invention, the airtight welding part is expanded to the upper surface and the lower surface of the ceramic window, so that the sealing area of the ceramic window and the circular waveguide is increased, the difficulty of welding between the ceramic window and the circular waveguide is reduced, the sealing performance of the sealing window is improved, and the sealing window structure is easy to assemble. The sealing window is further provided with the gradual change transition part; compared with the prior art, the sealing window can effectively expand the working frequency band of the sealing window, and the sealing window can be better matched with the rectangular waveguide; and meanwhile, the loss of the sealing window is reduced, and the in-band standing wave ratio is effectively lowered.

Description

technical field [0001] The invention relates to the technical field of microwave vacuum electronics. More specifically, it relates to the design of a microwave-tight window. Background technique [0002] The box window is a kind of sealing window commonly used in microwave vacuum devices. It mainly plays the following two functions: one is to seal to realize the high vacuum inside the microwave vacuum device, and the other is to transmit microwave power with a certain loss within a certain bandwidth. The general structure of the box-shaped window is to seal a disk dielectric sheet in a circular waveguide with the same cross-sectional radius, and then connect the two ends of the circular waveguide to the rectangular waveguide respectively. like figure 1 As shown, the circumferential surface of the dielectric sheet is in contact with the inner wall of the circular waveguide, and the sealing process of non-metal and metal materials is used to realize airtight welding, and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J23/40H01J23/12
Inventor 韦莹李冬凤杨继涛周军欧阳佳佳殷亮
Owner NO 12 RES INST OF CETC
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