Microwave low-loss waveguide vacuum window

A vacuum window and low-loss technology, applied to waveguide devices, electrical components, circuits, etc., to reduce loss and improve overall performance

Inactive Publication Date: 2010-05-26
CHINA ELECTRONICS TECH GROUP CORP NO 16 INST
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the problem that the waveguide mouth should not only have low loss, but also have vacuum sealing and heat insulation, the object of the present invention is to provide a microwave low-loss waveguide vacuum window, which can withstand the difference between vacuum and atmospheric pressure, and has high Strong strength, can meet the low microwave loss

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Embodiment Construction

[0011] see figure 1 , 2 , the vacuum cover 1 is installed in the shell of the refrigeration system, the lower base of the waveguide cavity 4 is connected with the vacuum cavity through 8 screws 14 and the sealing ring 5, the hard foam 3 is bonded to the waveguide port of the lower base of the waveguide cavity 4 with 703 silica gel, Place the polytetrafluoroethylene pad 10 and the polyimide film 13 on the lower seat 4 of the waveguide cavity, install the upper seat 9 of the waveguide cavity, and fasten the upper and lower seats of the waveguide cavity with 8 hexagonal screws 6 plus spring washers 7 and flat washers 8, The installation of microwave low-loss waveguide vacuum window is completed. Microwave low-loss waveguide vacuum windows in various frequency bands can be designed according to the structure shown in the figure, and the highest window frequency can reach the millimeter wave frequency band.

[0012] Microwave low-loss waveguide vacuum window, the normal temperatu...

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Abstract

The invention relates to a microwave low-loss waveguide vacuum window, which is hermetically separated from normal temperature and normal pressure at one end of waveguide microwave signal transmission to low temperature and high vacuum at the other end. The window comprises an upper waveguide cavity seat and a lower waveguide cavity seat, wherein the upper waveguide cavity seat is provided with a standard waveguide flange used as a waveguide short joint; the lower waveguide cavity seat is hermetically connected with a vacuum Dewar outer wall; the combination of a double-layer film of polyimide and polytetrafluoroethylene is clamped between two waveguide ports of the upper waveguide cavity seat and the lower waveguide cavity seat to form the microwave vacuum window; and one side of the window is a normal temperature and normal pressure zone, and the other side of the window is a low temperature vacuum zone. The microwave low-loss waveguide vacuum window has good microwave transmission performance, namely low microwave loss and good standing wave in the signal transmission, has high-vacuum sealing performance, is used on a vacuum cover of high-sensitivity signal receiving equipment, and is suitable for sealing the waveguide port from L wave band to 8mm frequency band.

Description

Technical field [0001] The invention relates to a waveguide mouth sealing device for microwave signal transmission. The device requires that one end of the microwave signal transmission of the waveguide should be a low-temperature high-vacuum transition from normal temperature and pressure to the other end, which requires a high-vacuum sealing partition to be designed in the waveguide. This kind of partition is called microwave vacuum window, which requires both excellent microwave transmission performance (that is, low microwave loss and good standing wave in signal transmission) and high vacuum sealing performance. Its technical fields involve microwave technology and vacuum technology. Background technique [0002] The microwave signal received by the antenna needs to be transmitted from the antenna feed source to the receiver for signal amplification, frequency mixing and other processing, and the sensitivity of the receiver is determined by the input noise figure of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/08
Inventor 李大志王生旺杨红梅王志杰朱香芹
Owner CHINA ELECTRONICS TECH GROUP CORP NO 16 INST
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