A radio frequency coaxial connector

Abstract

The application discloses a radio frequency coaxial connector and relates to the technical field of connectors. The existing single thick insulating support structure cannot accurately support the coaxiality control. The front end of the first outer conductor of the connector is provided with a front end through hole connected with the outer conductor of the connector, and the rear end is provided with a rear end opening. The first inner conductor is installed in the front end through hole. The first insulating support and the second insulating support are respectively installed on the second outer conductor and the third outer conductor. The second outer conductor and the third outer conductor are inserted into the rear end opening from inside to outside and are press-connected with the first outer conductor. The second inner conductor is installed in the second outer conductor and the third outer conductor through the first insulating support and the second insulating support. The second inner conductor is combined with the first inner conductor. The coaxiality of the radio frequency coaxial connector during assembly and use is effectively improved. The impedance matching condition is improved. The voltage standing wave ratio is reduced. The product electrical performance index is improved. The application has strong practicability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of connectors, in particular to a radio frequency coaxial connector. BACKGROUND

[0002] As a component of terminal application products, the connector is one of the basic elements of electrical connection of various circuit systems. The development of terminal application is the main factor to promote the rapid growth of the connector market and the development of technology. With the progress of the times and the development of technology, radio frequency connectors also develop towards high frequency, miniaturization and multi-channel hybrid transmission. There are many factors that affect the performance of the connector. The slots and gaps of the inner and outer conductors affect the transmission of electromagnetic waves. The diameter tolerance will affect the characteristic impedance. Different axiality will also cause changes in the characteristic impedance. These ultimately affect the electrical performance and increase the voltage standing wave ratio. For radio frequency coaxial connectors with a frequency of more than 40 GHz and a characteristic impedance of 50 ohms, the voltage standing wave ratio caused by different axiality is not more than 1.001. The mechanical axiality needs to be controlled within tens of microns. With the increase of frequency, the tolerance of axiality is smaller. In the development and use of conventional single-insulation-supported radio frequency connectors, the different axiality causes the electrical performance to deteriorate.

[0003] Therefore, it is particularly important to develop a structure that can better ensure the coaxiality of the inner conductor and the outer conductor to improve the existing situation, reduce the voltage standing wave ratio and improve the electrical performance index. Especially for millimeter wave coaxial connectors, the different axiality needs to be controlled within microns, and it is urgent to solve this problem. SUMMARY

[0004] The purpose of the present application is to provide a thin-insulation-supported radio frequency coaxial connector with a structure to solve the problem of inaccurate coaxiality control of the inner conductor supported by a single thick-insulation-supported structure.

[0005] In order to achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] A radio frequency coaxial connector is provided, which comprises a first outer conductor, a second outer conductor, a third outer conductor, a first inner conductor, a second inner conductor, a first insulation support and a second insulation support. The front end of the first outer conductor is provided with a front end through hole connected with the connector outer conductor, and the rear end is provided with a rear end opening. The first inner conductor is installed in the front end through hole. The first insulation support and the second insulation support are installed on the second outer conductor and the third outer conductor respectively. The second outer conductor and the third outer conductor are inserted into the rear end opening from inside to outside, and are press-fit with the first outer conductor. The second inner conductor is installed in the second outer conductor and the third outer conductor through the first insulation support and the second insulation support. The second inner conductor is combined and assembled with the first inner conductor.

[0007] The first and second insulation supports in the application are two thin insulation support media. Compared with the previous structure, the number of insulation supports is changed from one to two, and the thickness is reduced. For the connector of a longer structure, the number of insulation supports can be increased to multiple, and a section of outer conductor structure is added for placing the insulation support. The first insulation support of the two thin insulation supports adopts solid medium, and the outer conductor and the inner conductor are provided with steps for impedance compensation. The second insulation support can directly pass through the inner conductor, and is provided with a placing groove only on the outer conductor. The inner conductor is no longer provided with steps, and adopts the method of digging air slot for impedance compensation. In this way, the front and rear inner conductors can avoid being pressed together, and the stress caused by the radial size tolerance of the outer conductor when being pressed together can also be avoided. The above-mentioned connector solves the problem of insufficient coaxiality control of the millimeter wave single dielectric support connector, effectively improves the coaxiality of the radio frequency coaxial connector during assembly and use, improves the impedance matching condition, reduces the voltage standing wave ratio, improves the product electrical performance index, and has strong practicality. BRIEF DESCRIPTION OF DRAWINGS

[0008] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

[0009] Figure 1 is an assembly view of the radio frequency coaxial connector disclosed by the embodiment of the application;

[0010] Figure 2 is a first outer conductor cross-sectional view;

[0011] Figure 3 is a second outer conductor cross-sectional view;

[0012] Figure 4 is a third outer conductor cross-sectional view;

[0013] Figure 5 is a first inner conductor cross-sectional view;

[0014] Figure 6 is a second inner conductor schematic view;

[0015] Figure 7 is a second insulation support cross-sectional view.

[0016] BRIEF DESCRIPTION OF DRAWINGS

[0017] 1. first outer conductor; 2. second outer conductor; 3. third outer conductor; 4. first inner conductor; 5. second inner conductor; 6. first insulating support; 7. second insulating support; 8. snap ring; 9. nut; 11. front end through hole; 12. first outer conductor impedance compensation step; 13. rear end opening; 21. first mounting groove; 22. second outer conductor impedance compensation step; 23. first through hole; 31. second mounting groove; 32. second through hole; 41. first inner conductor impedance compensation step; 51. insulating support assembly step; 52. coplanar compensation step; 71, 72. insulating support air step. DETAILED DESCRIPTION

[0018] In order to make the technical problems to be solved by the present application, technical solutions and beneficial effects clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.

[0019] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0020] In addition, the terms "first", "second" are only for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited. The meaning of "several" is one or more, unless otherwise explicitly and specifically limited.

[0021] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0022] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0023] For details Figures 1 to 7 As shown in the drawings, the present application provides a radio frequency coaxial connector, which comprises a first outer conductor 1, a second outer conductor 2, a third outer conductor 3, a first inner conductor 4, a second inner conductor 5, a first insulating support 6 and a second insulating support 7. The front end of the first outer conductor 1 is provided with a front end through hole 11 connected with the outer conductor of the connector, and the rear end is provided with a rear end opening 13. The first inner conductor 4 is installed in the front end through hole 11. The first insulating support 6 and the second insulating support 7 are respectively installed on the second outer conductor 2 and the third outer conductor 3. The second outer conductor 2 and the third outer conductor 3 are inserted into the rear end opening 13 from the inside to the outside, and are press-fit matched with the first outer conductor 1. The second inner conductor 5 is installed in the second outer conductor 2 and the third outer conductor 3 through the first insulating support 6 and the second insulating support 7. The second inner conductor 5 is assembled with the first inner conductor 4.

[0024] In specific implementation:

[0025] The radio frequency coaxial connector mainly comprises a first outer conductor 1, a second outer conductor 2, a third outer conductor 3, a first inner conductor 4, a second inner conductor 5, a first insulating support 6 and a second insulating support 7. This structure can be used for intra-series switching, inter-series switching and cable connector of radio frequency coaxial connector series.

[0026] The first outer conductor 1 is provided with a through hole at the front end, and the hole diameter is the inner diameter of the outer conductor of the corresponding model connector. A first outer conductor impedance compensation step 12 is arranged at the rear end of the hole diameter, which is used as impedance coplanar compensation. The rear end opening 13 is used to install the second outer conductor 2 and the third outer conductor 3.

[0027] The second outer conductor 2 is provided with a first mounting slot 21 at the front end, which is used to place the first insulating support 6. A second outer conductor impedance compensation step 22 is arranged next to the slot, which plays a role of coplanar compensation. The rear end through hole size is the inner diameter of the outer conductor of the corresponding model connector.

[0028] The third outer conductor 3 is provided with a second mounting slot 31 at the front end, which is used to place the second insulating support 7. The rear end through hole size is the inner diameter of the outer conductor of the corresponding model connector.

[0029] The first inner conductor 4 is provided with an opening for accommodating the second inner conductor 5, and a tail end is provided with a step for cooperating with the step of the outer conductor to form impedance coplanar compensation, so as to achieve the purpose of impedance matching.

[0030] The second inner conductor 5 is provided with a step for assembling an insulating support and a coplanar compensation step 52, and is tightly fitted through the first insulating support 6 and the first inner conductor 4.

[0031] The first insulating support 6 is assembled in the first mounting groove 21 of the second outer conductor 2, and the second insulating support 7 is assembled in the second mounting groove 31 of the third outer conductor 3, and the second insulating support 7 is provided with insulating support air steps 71 (72) at both ends, which play a role in reducing the dielectric constant of the medium and impedance matching.

[0032] The first insulating support 6 and the second insulating support 7 are respectively assembled in the second outer conductor 2 and the third outer conductor 3, and the second inner conductor 5 is respectively fitted through the first insulating support 6 and the second insulating support 7 and the first inner conductor 4. The second outer conductor 2 and the third outer conductor 3 are sequentially fitted into the first outer conductor 1 for tight fitting.

[0033] The first insulating support and the second insulating support in the application are two relatively thin insulating support media. Compared with the previous structure, the number of insulating supports is changed from one to two, and the thickness is reduced. For a longer structure connector, the number of insulating supports can be increased to at most several, and a section of outer conductor structure is added for placing the insulating support. The first insulating support of the two relatively thin insulating supports adopts a solid medium, and the outer conductor and the inner conductor are provided with steps for impedance compensation. The second insulating support can directly pass through the inner conductor, and only a placing groove is provided on the outer conductor. The inner conductor is no longer provided with a step, and an air groove is adopted for impedance compensation. In this way, the tight fitting of the front and rear inner conductors can be avoided, and the stress caused by the radial size tolerance of the outer conductor tight fitting can be avoided. The above-mentioned connector solves the problem of insufficient coaxiality control of the millimeter wave single medium support connector, effectively improves the coaxiality of the radio frequency coaxial connector during assembly and use, improves the impedance matching condition, reduces the voltage standing wave ratio, improves the product electrical performance index, and has strong practicality.

[0034] As an implementable manner, the first outer conductor 1 is provided with a first outer conductor impedance compensation step 12 at a position where the front end through hole 11 communicates with the rear end opening 13.

[0035] The front end through hole 11 of the first outer conductor 1 facilitates the installation of the first inner conductor 4, and the hole diameter is the inner diameter of the outer conductor of the corresponding type of connector. The first outer conductor impedance compensation step 12 provided at the rear end of the hole diameter can be used as impedance coplanar compensation, and cooperates with the inner conductor impedance compensation step. The rear end opening 13 facilitates the installation of the second outer conductor 2 and the third outer conductor 3.

[0036] As one possible implementation, a first mounting groove 21 is provided on the side of the second outer conductor 2 facing the front end through hole 11, the first insulating support 6 is installed in the first mounting groove 21, a first through hole 23 is provided in the middle of the second outer conductor 2, and a secondary outer conductor impedance compensation step 22 is provided at the position where the first through hole 23 communicates with the first mounting groove 21.

[0037] The first mounting groove 21 facilitates the installation of the first insulating support 6. The designed secondary outer conductor impedance compensation step 22 can play a coplanar compensation role. The designed first through hole 23 facilitates the installation of the second inner conductor 5.

[0038] In one possible implementation, a second mounting groove 31 is provided on the side of the third outer conductor 3 facing the second outer conductor 2, and a second insulating support 7 is installed in the second mounting groove 31. A second through hole 32 is provided in the middle of the third outer conductor 3, and a mounting step is provided on the side of the third outer conductor 3 facing the second outer conductor 2. Furthermore, the outer diameter of the mounting step is the same as the inner diameter of the rear opening 13.

[0039] The second mounting groove 31 facilitates the installation of the second insulating support 7, the second through hole 32 facilitates the installation of the second inner conductor 5, and the mounting step on the third outer conductor 3 facilitates the installation of the third outer conductor 3. The crimping installation method ensures the installation effect.

[0040] As one possible implementation, a mounting hole is provided at the end of the first inner conductor 4 facing the second inner conductor 5, and the end of the second outer conductor 2 facing the first inner conductor 4 is inserted into the mounting hole. A first-level inner conductor impedance compensation step 41 is provided on the outer wall of the end of the first inner conductor 4 facing the second inner conductor 5.

[0041] The mounting holes on the first inner conductor 4 facilitate the combined installation with the fixed extension of the second outer conductor 2. The design of the first-stage inner conductor impedance compensation step 41 can cooperate with the first-stage outer conductor impedance compensation step 12 and the second-stage outer conductor impedance compensation step 22 to form impedance coplanar compensation and achieve impedance matching.

[0042] In one possible implementation, a fixed extension is provided at one end of the second inner conductor 5 facing the first inner conductor 4. The outer diameter of the fixed extension is the same as the inner diameter of the mounting hole. An insulating support assembly step 51 is provided at one end of the fixed extension away from the first inner conductor 4. The insulating support assembly step 51 is assembled with the first insulating support 6. A coplanar compensation step 52 is provided at the position where the second inner conductor 5 connects with the insulating support assembly step 51.

[0043] The fixed extension is arranged, the installation and fixation of the second inner conductor 5 are facilitated, the insulating support assembly step 51 is arranged, the combined assembly with the first insulating support 6 is facilitated, the fixation of the second inner conductor 5 is realized, the coplanar compensation step 52 is arranged, the impedance coplanar compensation is formed, and the impedance matching purpose is achieved.

[0044] As an implementable manner, the outer diameters of the first inner conductor 4 and the second inner conductor 5 are same, the end of the first inner conductor 4 away from the second inner conductor 5 and the end of the second inner conductor 5 away from the first inner conductor 4 are provided with the connecting parts with the same outer diameter.

[0045] The first inner conductor 4 and the second inner conductor 5 have the same diameter, the installation is facilitated, and the transmission effect is ensured, and the connecting part is arranged, the installation with the same type connector is facilitated.

[0046] As an implementable manner, the two sides of the second insulating support 7 are provided with the insulating support air steps 71(72).

[0047] The insulating support air steps 71(72) are arranged, the dielectric constant of the medium is reduced, and the impedance matching effect is achieved.

[0048] As an implementable manner, the connector further comprises a snap ring 8 and a mounting nut 9; the outer wall of the first outer conductor 1 is provided with an annular groove, the outer wall of the two ends of the first outer conductor 1 is provided with an external thread, the snap ring 8 is installed in the annular groove, the mounting nut 9 is threadedly installed on the first outer conductor 1, and when the mounting nut 9 is installed on the first outer conductor 1, the snap ring 8 is attached to the inner wall of the mounting nut 9.

[0049] The snap ring 8 and the mounting nut 9 are arranged, the coupling installation between other same type connectors is facilitated, and the installation effect is ensured.

[0050] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A radio frequency coaxial connector, characterized in that, It includes a first outer conductor, a second outer conductor, a third outer conductor, a first inner conductor, a second inner conductor, a first insulating support, and a second insulating support; The first outer conductor has a front through hole for connecting with the outer conductor of the connector at its front end and a rear opening at its rear end. The first inner conductor is installed in the front through hole. The first insulating support and the second insulating support are respectively installed on the second outer conductor and the third outer conductor. The second outer conductor and the third outer conductor are inserted into the rear opening from the inside to the outside and are crimped with the first outer conductor. The second inner conductor is installed in the second outer conductor and the third outer conductor through the first insulating support and the second insulating support. The second inner conductor is assembled with the first inner conductor. A first-stage external conductor impedance compensation step is provided at the position where the front through hole connects to the rear opening. The second outer conductor has a first mounting groove on the side facing the front end through hole, the first insulating support is installed in the first mounting groove, the middle of the second outer conductor has a first through hole penetrating the second outer conductor, and a secondary outer conductor impedance compensation step is provided at the position where the first through hole communicates with the first mounting groove. The third outer conductor has a second mounting groove on the side facing the second outer conductor, the second insulating support is installed in the second mounting groove, the third outer conductor has a second through hole in the middle, and the third outer conductor has a mounting step on the side facing the second outer conductor. The first inner conductor has a mounting hole at one end facing the second inner conductor, and the second outer conductor is inserted into the mounting hole at one end facing the first inner conductor. A first-level inner conductor impedance compensation step is provided on the outer wall of the first inner conductor at one end facing the second inner conductor. The second inner conductor has a fixed extension portion at one end facing the first inner conductor. The outer diameter of the fixed extension portion is the same as the inner diameter of the mounting hole. The fixed extension portion has an insulating support assembly step at one end away from the first inner conductor. The insulating support assembly step is assembled with the first insulating support. A coplanar compensation step is provided at the position where the second inner conductor connects with the insulating support assembly step. The first inner conductor and the second inner conductor have the same outer diameter. The end of the first inner conductor away from the second inner conductor and the end of the second inner conductor away from the first inner conductor are both provided with a connecting part with the same outer diameter. Insulating support air steps are provided on both sides of the second insulating support.

2. The RF coaxial connector according to claim 1, characterized in that, The outer diameter of the mounting step is the same as the inner diameter of the rear end opening.

3. The RF coaxial connector according to claim 1, characterized in that, The connector also includes a retaining ring and a mounting nut; An annular groove is provided on the outer wall of the first outer conductor, and external threads are provided on the outer walls of both ends of the first outer conductor. The retaining ring is installed in the annular groove, and the mounting nut is threaded onto the first outer conductor. When the mounting nut is installed on the first outer conductor, the retaining ring is in contact with the inner wall of the mounting nut.

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