A non-magnetic RF signal connector for vacuum sealing

Abstract

The invention relates to a non-magnetic RF signal connector for vacuum sealing. The non-magnetic RF signal connector for vacuum sealing comprises a conductive element and a sealing device. The sealing device comprises the sealing of the conductive element. A sealing member body (4) radially passes through a brass assembly body (9) and is connected with a clamping ring (6), an O-shaped ring (7) and a locking nut (8) to be the sealing device which can be movably dismounted integratedly. The sealing device comprises the sealing of the conductive element and the sealing of a vacuum chamber outer wall (1). The sealing of the conductive element is achieved through a contact hole (12) arranged on the sealing member body (4). A sealant (10) is pasted in the contact hole (12). Through two modes of sealing, the vacuum sealing effect is good, the vacuum leak rate is smaller than 1.0*10<-10>Pa.m3 / s, and the non-magnetic RF signal connector has the advantages of simple integrated design structure, low manufacturing cost, and convenient manufacture.

Description

technical field [0001] The present invention relates to a non-magnetic radio frequency signal connector for vacuum sealing, in particular to a vacuum sealing function and can be used in occasions requiring high non-magnetic properties (such as nuclear magnetic resonance) for transmitting radio frequency signals RF coaxial connector. Background technique [0002] Radio frequency signal connectors (referred to as RF connectors) are generally considered to be a component that is attached to a cable or installed on an instrument. As a component for connecting or separating transmission line signals, it mainly acts as a bridge. It also has the functions of signal processing, such as filtering, phase modulation, frequency mixing, attenuation, detection, limiting, etc., and has the characteristics of small size. [0003] At present, there are conventional RF signal connectors with various interfaces on the market, which are widely used in various fields. With the promotion and use...

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Problems solved by technology

[0003] At present, there are conventional RF signal connectors with various interfaces on the market, which are widely used in various fields. With the promotion and use of the market, various types of RF connector technologies are becoming more and more mature, and are basically used in conventional fields, but if used In special fields, such as when the system requires a high vacuum sealing environment, conventional RF connectors cannot meet its vacuum sealing requirements. In this case, it is necessary to use RF connectors with good vacuum sealing performance, such as in magnetic resonance In the system, conventional RF connectors are made of magnetic materials, which will affect the uniformity of the magnetic field, and cannot achieve the purpose of low leakage rate and good shielding effect; in addition, conventional vacuum-sealed RF connectors are connected to the vacuum through wires. Indoor and outdoor, only suitable for transmitting relevant DC signals

[0004] Chinese Patent Publication No. CN102856717A, publication date: January 02, 2013, title of the invention: a radio frequency coaxial connector with vacuum sealing function, the application discloses a radio frequency coaxial connector with vacuum sealing function In order to meet the RF signal input / output needs of the vacuum sealing system, the RF connector in this application will be unreliable after repeated plugging and use. The sealing ring of the RF connector in this application is made of poly Tetrafluoroethylene material, as a sealing material, cannot guarantee the ability to maintain a vacuum seal for a long time, and it is difficult to ensure a low leakage rate. This RF connector can be used to transmit RF signals

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