Non-magnetic broadband microwave ultrahigh-vacuum joint

Abstract

The invention provides a non-magnetic broadband microwave ultrahigh-vacuum joint which comprises the components of a joint seat, a microwave welding member, a ceramic member, a conductor core, a first coaxial medium, a first inner conductor clamp, a joint matching adjusting member, a first SMA joint, a first SMA projected joint, an SMA coaxial line, a coaxial line inner conductor, a second SMA joint, a second SMA projected joint, a joint fixing member, a second coaxial medium and a second inner conductor clamp, wherein all materials of the ultrahigh-vacuum joint are non-magnetic. According to the non-magnetic broadband microwave ultrahigh-vacuum joint, a microwave vacuum sealing welding manner is utilized for welding the welding member and the ceramic medium, thereby simplifying a manufacturing process of the vacuum microwave coaxial joint, substantially improving an application range in an ultrahigh-vacuum environment, and improving vacuum sealing performance, so that the vacuum degree of the vacuum component after welding is lower than or equal with 10<-6>Pa, and a pressure of 10<-9> to 10<-8> Pa can be reached. The non-magnetic broadband microwave ultrahigh-vacuum joint is particularly suitable for a microwave vacuum experiment in which a non-magnetic environment is required.

Description

technical field [0001] The invention belongs to the field of microwave coaxial joints, and more specifically relates to a non-magnetic broadband microwave ultra-high vacuum joint. Background technique [0002] At present, scientific experiments need to be carried out in a non-magnetic interference and ultra-high vacuum environment, so ultra-high vacuum microwave joints made of non-magnetic materials are particularly important. Since most of the metal materials welded with ceramics are magnetic materials, good sealing performance can be achieved, and the manufacture of non-magnetic microwave ultra-high vacuum joints is a major difficulty. [0003] Since the non-magnetic dielectric material has the characteristics of low magnetic permeability, it is necessary to use this dielectric material in some non-magnetic experiments. Therefore, broadband microwave ultra-high vacuum joints with non-magnetic dielectric materials can play an important role in these occasions. [0004] Th...

AI Technical Summary

Problems solved by technology

[0004] The existing microwave coaxial joints mainly have the following defects or deficiencies: First, most of the sealed joints are used in environments that do not require high magnetic properties, and very few can make the joints non-magnetic; secondly, the welding of non-magnetic dielectric materials in the sealed joints Difficult, the high temperature generated during welding will cause the welded metal and dielectric material to be damaged due to deformation, and the sealing performance of the direct welding of the dielectric material and the metal is poor; again, the microwave coaxial joints currently on the market are mostly used for non-vacuum The environment generally only works in one atmospheric pressure environment, but not in 10 -9 to 10 -8 Pa pressure in ultra-high vacuum environment

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