Vacuum radio frequency connector

Abstract

The utility model 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 utility model, vacuum sealing can be realized, high-frequency signals can be transmitted, and the cost of the connector is lower than that of a glass-sealed vacuum connector and a ceramic-sealed vacuum connector.

Description

Technical Field

[0001] The utility model relates to the technical field of radio frequency connectors, and particularly relates to a vacuum radio frequency connector. Background Art

[0002] A vacuum connector is a connector that passes through the vacuum chamber wall and transmits DC or radio frequency signals between the atmosphere and the vacuum, and has a wide range of applications in equipment such as charged particle accelerators, vacuum furnaces, vacuum leak detectors, nuclear reactors, aerospace, semiconductors, high-end equipment manufacturing, and new material preparation.

[0003] A vacuum connector generally consists of an outer conductor, an inner conductor, and a support structure made of metal materials. The support structure plays an insulating and sealing role, and its sealing methods are diverse, such as cured glue sealing, glass sealing, ceramic sealing, etc. The cured glue sealed vacuum connector is suitable for normal temperature and low-frequency signal transmission scenarios; the glass sealed vacuum connector has a high temperature resistance capacity, and the transmitted signals cover DC to radio frequency; the ceramic sealed vacuum connector can withstand ultra-low temperature and ultra-high temperature, and the transmitted signals cover DC to radio frequency.

[0004] In the scenarios of vacuum, normal temperature, and high-frequency signal transmission, glass sealed and ceramic sealed connectors are available. The relatively more mature one is the ceramic sealed connector, but the costs of both are relatively high.

[0005] Common interface forms of radio frequency connectors 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. To ensure bandwidth performance, the structure is often a hollow structure and cannot be used in scenarios with vacuum sealing requirements. Summary of the Utility Model

[0006] The utility model solves the problems in the related art and provides a vacuum radio frequency connector that can achieve vacuum sealing and transmit high-frequency signals, and the cost is lower than that of glass sealed and ceramic sealed vacuum connectors.

[0007] To solve the above technical problems, the utility model is realized through the following technical solutions: A vacuum radio frequency connector includes a first outer conductor, an inner conductor, and a second outer conductor. The inner conductor is clamped by a first insulating support and a second insulating support and passes 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 to the second outer conductor, 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 opened on both sides of the second insulating support, and the inner sealing ring and the outer sealing ring are placed in the grooves.

[0009] Preferably, the first outer conductor and the second outer conductor are detachably connected by threads.

[0010] Preferably, both the inner sealing ring and the outer sealing ring are fluororubber rings.

[0011] Preferably, the ends of the first outer conductor and the second outer conductor away from each other have external threads.

[0012] Preferably, the first insulating support and the second insulating support are made of PTFE.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows: The present utility model has a fully enclosed insulating support structure with appropriate impedance matching between the inner conductor and the outer conductor. There is a fluororubber ring for vacuum sealing between the inner conductor and the insulating support, and between the insulating support and the outer conductor. Thus, the space environment at both ends of the connector is isolated from the inside, achieving airtightness while transmitting radio frequency signals; this connector can be applied in a high-vacuum environment on the premise of reaching 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. It is applicable to occasions where the temperature tolerance 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 is a schematic diagram of the overall structure of the present utility model;

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

[0016] Figure 3 is a measured insertion loss curve graph of the connector of the present utility model.

[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 OF THE EMBODIMENTS

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way limits the present utility model and its application or use. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[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, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0021] Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be regarded as part of the authorized specification. In all the examples shown and discussed herein, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0022] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom" are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present invention; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

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

[0024] In addition, it should be noted that the use of terms such as "first", "second" etc. to define components is only for the convenience of differentiating the corresponding components. Without additional statements, the above terms have no special meanings, and thus should not be construed as limiting the protection scope of the present utility model.

[0025] The interface form in the attached drawing of this embodiment is N-type. Of course, interface forms such as SMA, BNC etc. can also be adopted.

[0026] As Figures 1 to 2 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, the second insulating support 5 is embedded in the second outer conductor 8, the first outer conductor 1 is detachably connected to the second outer conductor 7, and inner sealing rings 4 and outer sealing rings 6 are respectively installed between the second insulating support 5, the inner conductor 3 and the second outer conductor 7. Specifically, grooves are formed on both sides of the second insulating support 5, and the inner sealing rings 4 and the outer sealing rings 6 are placed in the grooves.

[0027] In addition, the installation method of this connector is welding, and it can also be welded to a KF or CF flange to form a detachable connector.

[0028] In one embodiment, for ease of installation and disassembly, the first outer conductor 1 and the second outer conductor 7 are detachably connected by threads. Specifically, as Figure 1 shown, the second outer conductor 7 has internal threads, the first outer conductor 1 has external threads, and the first outer conductor 1 extends into the second outer conductor 7 and is connected by the internal and external threads, so as to provide a clamping force for the internal components.

[0029] In one embodiment, both the inner sealing ring 4 and the outer sealing ring 6 are fluororubber rings. On the premise of meeting the sealing specifications, the cross-sectional area is as small as possible 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 materials of the first insulating support 2 and the second insulating support 5 are materials with low dielectric constant and small loss tangent, such as PTFE.

[0032] As Figure 3 shown, for the N-type connector within the frequency range of DC - 16 GHz, the insertion loss < 0.3 dB, and it has an efficient radio frequency transmission rate. Through appropriate size adjustment, the standard usage bandwidth of the corresponding port type connector can be achieved.

[0033] The above is the preferred embodiment of the present utility model. Those skilled in the art to which the present utility model pertains can also make changes and modifications to the above embodiment. Therefore, the present utility model is not limited to the above specific embodiments, and any obvious improvements, substitutions, or variations made by those skilled in the art based on the present utility model fall within the protection scope of the present utility model.

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 (7), 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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