Vacuum radio frequency connector

Abstract

The invention relates to the technical field of radio frequency connectors, in particular to a vacuum radio frequency connector, which comprises a first outer conductor, an inner conductor and a second outer conductor, and is characterized in that the inner conductor is clamped by a first insulating support and a second insulating support and penetrates through the first insulating support and the second insulating support; the first insulating support is embedded in the first outer conductor, the second insulating support is embedded in the second outer conductor, the first outer conductor is detachably connected with the second outer conductor, and an inner sealing ring and an outer sealing ring are respectively arranged between the second insulating support and the inner conductor and between the second insulating support and the second outer conductor. According to the connector, vacuum sealing can be achieved, high-frequency signals can be transmitted, and the cost is lower than that of a glass-sealed vacuum connector and a ceramic-sealed vacuum connector.

Description

Technical Field

[0001] The present invention relates to the technical field of radio frequency connectors, and in particular to a vacuum radio frequency connector. Background Art

[0002] A vacuum connector is a connector that passes through the wall of a vacuum chamber and transmits DC or RF signals between the atmosphere and true space. It is widely used in charged particle accelerators, vacuum furnaces, vacuum leak detectors, nuclear reactors, aerospace, semiconductors, high-end equipment manufacturing, new material preparation and other equipment.

[0003] Vacuum connectors are generally composed of an outer conductor, an inner conductor and a supporting structure made of metal materials. The supporting structure plays an insulating and sealing role. There are various sealing methods, such as curing glue sealing, glass sealing, ceramic sealing, etc. Curing glue sealed vacuum connectors are suitable for normal temperature and low-frequency signal transmission scenarios; glass sealed vacuum connectors have high temperature resistance and transmit signals covering DC to RF; ceramic sealed vacuum connectors can withstand ultra-low and ultra-high temperatures and transmit signals covering DC to RF.

[0004] In vacuum, room temperature, and high-frequency signal transmission scenarios, glass-sealed and ceramic-sealed connectors are available. Ceramic-sealed connectors are relatively more mature, but both are relatively expensive.

[0005] Common RF connector interface types include SMA, N, BNC, etc. The port impedance is generally 50Ω. The insulating support structure inside the connector will introduce impedance mismatch, causing signal reflection and reducing performance. In order to ensure bandwidth performance, the structure is often a hollow structure and cannot be used in scenarios where vacuum sealing is required. Summary of the invention

[0006] The present invention solves the problems in the related art and provides a vacuum radio frequency connector which can realize vacuum sealing and transmit high-frequency signals, and has a lower cost than glass-sealed and ceramic-sealed vacuum connectors.

[0007] In order to solve the above technical problems, the present invention is implemented through the following technical solutions: a vacuum radio frequency connector, comprising a first outer conductor, an inner conductor and a second outer conductor, the inner conductor being clamped by a first insulating support and a second insulating support and passing through the first insulating support and the second insulating support; the first insulating support is embedded in the first outer conductor, the second insulating support is embedded in the second outer conductor, the first outer conductor and the second outer conductor are detachably connected, and an inner sealing ring and an outer sealing ring are respectively installed between the second insulating support and the inner conductor and the second outer conductor.

[0008] As a preferred solution, grooves are provided on both sides of the second insulating support, and the inner sealing ring and the outer sealing ring are placed in the grooves.

[0009] As a preferred solution, the first outer conductor and the second outer conductor are detachably connected via threads.

[0010] As a preferred solution, the inner sealing ring and the outer sealing ring are both fluororubber rings.

[0011] As a preferred solution, the ends of the first outer conductor and the second outer conductor that are away from each other have external threads.

[0012] As a preferred solution, the material of the first insulating support and the second insulating support is PTFE.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: a fully enclosed insulating support structure with appropriate impedance matching is provided between the inner conductor and the outer conductor, and a fluororubber ring is provided between the inner conductor and the insulating support as well as between the insulating support and the outer conductor for vacuum sealing, thereby isolating the spatial environment at both ends of the connector from the inside, thereby achieving air tightness while transmitting radio frequency signals; the connector can be applied in a high vacuum environment while achieving the typical bandwidth of the corresponding type of connector, and has a certain ability to withstand high and low temperature environments. At the same time, the manufacturing cost is much lower than that of common glass-sealed and ceramic-sealed vacuum connectors, and is suitable for use in situations where the temperature is between -60°C and 120°C and there is a need to transmit radio frequency signals between vacuum and atmosphere. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0015] Figure 2 is an exploded view of the present invention;

[0016] Figure 3 It is the insertion loss curve diagram of the connector of the present invention.

[0017] In the figure:

[0018] 1. first outer conductor, 2. first insulating support, 3. inner conductor, 4. inner sealing ring, 5. second insulating support, 6. outer sealing ring, 7. second outer conductor. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0021] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0022] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0023] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0024] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0025] The interface form in the drawings of this embodiment is N-type. Of course, SMA, BNC and other interface forms can also be used.

[0026] like Figures 1 to 2 As shown, a vacuum radio frequency connector includes a first outer conductor 1, an inner conductor 3 and a second outer conductor 7. The inner conductor 3 is clamped by a first insulating support 2 and a second insulating support 5 and passes through the first insulating support 2 and the second insulating support 5, so as to keep the inner conductor 3 fixed; the first insulating support 2 is embedded in the first outer conductor 1, and the second insulating support 5 is embedded in the second outer conductor 8. The first outer conductor 1 and the second outer conductor 7 are detachably connected. An inner sealing ring 4 and an outer sealing ring 6 are respectively installed between the second insulating support 5 and the inner conductor 3 and the second outer conductor 7. Specifically, grooves are opened on both sides of the second insulating support 5, and the inner sealing ring 4 and the outer sealing ring 6 are placed in the grooves.

[0027] In addition, the connector is installed by welding, and can also be welded to a KF or CF flange to form a detachable connector.

[0028] In one embodiment, in order to facilitate installation and disassembly, the first outer conductor 1 and the second outer conductor 7 are detachably connected by threads. Specifically, Figure 1 As shown, the second outer conductor 7 has an internal thread, the first outer conductor 1 has an external thread, and the first outer conductor 1 extends into the second outer conductor 7 and is connected via the internal and external threads, thereby providing a clamping force for the internal components.

[0029] In one embodiment, the inner sealing ring 4 and the outer sealing ring 6 are both fluororubber rings, and their cross-sectional areas are as small as possible under the premise of meeting the sealing specifications, so as to reduce the disturbance to the impedance.

[0030] In one embodiment, the ends of the first outer conductor 1 and the second outer conductor 7 that are away from each other have external threads.

[0031] In one embodiment, the first insulating support 2 and the second insulating support 5 are made of a material with a low dielectric constant and a small loss tangent, such as PTFE.

[0032] like Figure 3 As shown, the N-type connector has an insertion loss of less than 0.3dB in the frequency range of DC-16GHz and has a high RF transmission rate. Through appropriate size adjustment, the standard usage bandwidth of the corresponding port type connector can be achieved.

[0033] The above are preferred implementation modes of the present invention. Those skilled in the art to which the present invention belongs can also change and modify the above implementation modes. Therefore, the present invention is not limited to the above specific implementation modes. Any obvious improvements, substitutions or modifications made by those skilled in the art on the basis of the present invention belong to the protection scope of the present invention.

Claims

1. A vacuum radio frequency connector, comprising a first outer conductor (1), an inner conductor (3) and a second outer conductor (7), characterized in that: The inner conductor (3) is clamped by a first insulating support (2) and a second insulating support (5) and passes through the first insulating support (2) and the second insulating support (5); the first insulating support (2) is embedded in the first outer conductor (1), the second insulating support (5) is embedded in the second outer conductor (8), the first outer conductor (1) and the second outer conductor (7) are detachably connected, and an inner sealing ring (4) and an outer sealing ring (6) are respectively installed between the second insulating support (5) and the inner conductor (3) and the second outer conductor (7).

2. The vacuum radio frequency connector according to claim 1, characterized in that: Grooves are provided on both sides of the second insulating support (5), and the inner sealing ring (4) and the outer sealing ring (6) are placed in the grooves.

3. The vacuum radio frequency connector according to claim 1, characterized in that: The first outer conductor (1) and the second outer conductor (7) are detachably connected via threads.

4. The vacuum radio frequency connector according to claim 1, characterized in that: The inner sealing ring (4) and the outer sealing ring (6) are both fluororubber rings.

5. The vacuum radio frequency connector according to claim 1, characterized in that: The ends of the first outer conductor (1) and the second outer conductor (7) which are away from each other have external threads.

6. The vacuum radio frequency connector according to claim 1, characterized in that: The material of the first insulating support (2) and the second insulating support (5) is PTFE.

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