SMA joint and PIPS detector connector

Abstract

The utility model relates to the field of connectors, and discloses an SMA joint and a PIPS detector connector. According to the utility model, the SMA joint comprises a housing and a central needle coaxially arranged in the housing in a penetrating manner, one end of the housing is a connecting end facing an external interface for installation, the other end of the housing is a fixed end connected with a shielded wire, the fixed end is provided with a needle plate in an attached manner, the needle plate is provided with a needle hole corresponding to the central needle, and the central needle is provided with a plurality of through holes corresponding to the central needle. The center needle penetrates through the needle hole to be fixedly connected with the needle plate, and the needle plate can limit and fix the center needle in the radial direction of the center needle; through the design that the center needle penetrates through the needle plate and is fixedly connected with the needle plate, the needle plate can limit and fix the center needle in the radial direction of the center needle, the connection stability of the center needle and the shielding wire is enhanced, the service life of the SMA connector is prolonged, and the reliability of the SMA connector is improved.

Description

Technical Field

[0001] The utility model relates to the field of connectors, in particular to an SMA connector and a PIPS detector connector. Background Art

[0002] PIPS detectors, or passivated implanted planar silicon detectors, are an important innovation in the field of semiconductor detection technology, and are mainly used in nuclear physics experiments, radiation monitoring, medical imaging, nuclear medicine, and other fields. In most applications, they have replaced silicon surface potential accumulation detectors and diffuse implantation detectors.

[0003] SMA stands for SubMiniature version A. The SMA connector is a type of RF coaxial connector widely used in the RF and microwave industries. It is particularly suitable for RF connections in electronic systems with frequencies up to 18 GHz or even higher. Currently, the PIPS detector connector uses a crimped male pin female SMA connector to connect to the shielded wire, which is epoxy-encapsulated and used to install the PIPS detector. After several installations and removals of the PIPS detector, the connection between the center pin of the SMA connector and the core wire of the shielded wire is easily broken due to stress, resulting in poor contact and damage to the connector, which makes it unusable. Utility Model Content

[0004] The utility model aims to provide an SMA connector and a PIPS detector connector, which can increase the radial tolerance of the center pin of the SMA connector and increase the service life and reliability of the SMA connector.

[0005] In order to solve the above technical problems, the embodiment of the utility model provides an SMA connector, comprising:

[0006] An SMA connector comprises a shell and a center needle coaxially inserted into the shell, one end of the shell is a connecting end installed toward an external interface, and the other end is a fixed end connected to a shielded wire, a needle plate is fitted on the fixed end, a pinhole is provided on the pin plate corresponding to the center needle, and the center needle passes through the pinhole to be fixedly connected to the pin plate.

[0007] An SMA connector comprises a shell and a center needle coaxially inserted into the shell, wherein one end of the shell installed toward an external interface is a connecting end, and the other end is a fixed end connected to a shielding wire, wherein a needle plate is fitted onto the fixed end, wherein the needle plate is provided with a needle hole corresponding to the center needle, wherein the center needle passes through the needle hole to be connected to the shielding wire, and the needle plate can limit and fix the center needle along the radial direction of the center needle.

[0008] Furthermore, the fixed end is provided with a limiting pin, and the limiting pin can limit the needle plate along the radial direction of the shell.

[0009] Furthermore, the limiting pins are symmetrically arranged at the edge of the fixed end, and the needle plate is clamped between the limiting pins. The limiting pins can limit the needle plate in at least two directions perpendicular to each other to prevent the needle plate from radially displacing along the shell.

[0010] Furthermore, it also includes a box-shaped shielding cover with an open end, the open end of the shielding cover faces the fixed end and is fixedly connected to the fixed end, and the shielding wire passes through the shielding cover from the outer periphery of the shielding cover toward the fixed end and is fixedly connected to the center pin.

[0011] Furthermore, the shielded wire comprises a core wire for signal transmission and an insulating shielding layer wrapped around the core wire, and the shielding cover is welded and fixed to the shielding layer of the shielded wire.

[0012] Furthermore, the center needle is arranged opposite to the core wire and is fixedly connected to the needle plate by welding respectively, and the center needle is electrically connected to the core wire.

[0013] Furthermore, it comprises a base, the base is coaxially sleeved on the periphery of the shell, and a protective sleeve is coaxially sleeved between the base and the shell.

[0014] Furthermore, an annular groove is provided at one end of the base facing the connecting end, and a sealing ring is provided in the annular groove.

[0015] Furthermore, a sealing member is provided between the shielding cover and the base.

[0016] Furthermore, the sealing member is epoxy resin.

[0017] Furthermore, the needle plate is made of polytetrafluoroethylene.

[0018] The utility model also provides a PIPS detector connector, comprising a shielded wire, one end of the shielded wire is connected to a BNC connector, and the other end of the shielded wire is connected to any one of the above-mentioned SMA connectors.

[0019] Compared with the prior art, the SMA connector and PIPS detector connector provided by the utility model are designed such that the center pin passes through the pin plate and is fixedly connected to the pin plate, so that the pin plate can limit and fix the center pin in the radial direction of the center pin, thereby enhancing the radial tolerance of the center pin during use, and allowing the center pin of the SMA connector to be stably connected to the shielding wire during repeated disassembly and use, thereby increasing the service life and reliability of the SMA connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of a PIPS detector connector in one embodiment of the utility model;

[0022] Figure 2 This is an exploded view of a PIPS detector connector in one embodiment of the utility model;

[0023] Figure 3 It is a top view of the vacuum shielding joint of a PIPS detector in one embodiment of the utility model;

[0024] Figure 4 Yes Figure 3 Partial view of the AA section view;

[0025] Figure 5 It is an exploded view of an SMA connector in one embodiment of the utility model.

[0026] Explanation of the reference numerals: 100, SMA connector; 10, base; 101, annular groove; 20, protective cover; 30, shell; 301, connecting end; 302, fixing end; 303, limiting pin; 40, needle plate; 401, pinhole; 50, shielding cover; 60, shielding wire; 61, shielding shell; 62, core wire; 70, seal; 80, center needle; 90, sealing ring; 200, PIPS detector connector; 210, BNC connector. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the utility model clearer, the various embodiments of the utility model will be described in detail below with reference to the accompanying drawings. However, it can be understood by those skilled in the art that in the various embodiments of the utility model, many technical details are provided in order to enable readers to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical schemes claimed for protection in the claims of the present application can be implemented.

[0028] The PIPS detector, or passivated injected planar silicon detector, is an important innovation in the field of semiconductor detection technology and is mainly used in nuclear physics experiments, radiation monitoring, medical imaging, nuclear medicine and other fields.

[0029] like Figure 1-5As shown, the utility model relates to an SMA connector 100 and a PIPS detector connector 200, wherein the PIPS detector connector 200 comprises a shielded wire 60, and the two ends of the shielded wire 60 are respectively connected with an SMA connector 100 and a BNC connector 210. The full name of the SMA is SubMiniature version A, and the SMA connector 100 is a radio frequency coaxial connector widely used in the radio frequency and microwave industries, and is particularly suitable for radio frequency connections in electronic systems with frequencies up to 18 GHz or even higher; the full name of the BNC connector 210 is Bayonet Nut Connector, which is also a radio frequency coaxial connector, and its operating frequency is generally 4 GHz.

[0030] In one embodiment, the SMA connector 100 includes a conductive shell 30 and a center pin 80 coaxially inserted into the shell 30. The shell 30 is a hollow cylinder, and an insulator is filled between the center pin 80 and the shell 30. One end of the shell 30 is a connection end 301, and the connection end 301 is used to connect to an external interface. The end face of the center pin 80 facing the connection end 301 does not exceed the end face of the connection end 301. The other end of the shell 30 is a fixed end 302 connected to the shielding wire 60. One end of the center pin 80 facing the fixed end 302 extends beyond the end face of the fixed end 302. The shell 30 also includes a needle plate 40, which is fitted at the fixed end 302. The needle plate 40 is provided with a pinhole 401 corresponding to the center pin 80, and the pinhole 401 is a through hole. The center pin 80 passes through the pinhole 401 and is fixedly connected to the pin plate 40. The pin plate 40 can limit and fix the center pin 80 along the radial direction of the center pin 80. The pin plate 40 is made of insulating material. Preferably, the pin plate 40 is a PCB board. The substrate of the PCB board is polytetrafluoroethylene. The polytetrafluoroethylene material has good insulation performance and a very low dielectric constant, which can reduce the leakage current of the SMA connector 100. The upper and lower surfaces of the pin plate 40 are provided with pads, and the center pin 401 is welded and fixed to the pin plate 40 through the pads. In different usage scenarios, the pin plate 40 is a PCB board with other low dielectric constant substrates.

[0031] In one embodiment, the plane of the needle plate 40 is fitted with the end surface of the fixed end 302, and the needle plate 40 and the fixed end 302 are in surface contact. The needle plate 40 and the fixed end 302 block each other along the axial direction of the shell 30. The fixed end 302 is provided with at least one limiting pin 303, and the needle plate 40 is clamped with the limiting pin 303. The limiting pin 303 can limit the needle plate 40 along the radial direction of the shell 30 to prevent the needle plate 40 from moving radially along the shell 30.

[0032] In one embodiment, the cross section of the needle plate 40 is T-shaped, and the limiting pins 303 are provided in plurality and symmetrically arranged at the edge of the fixed end 302. The needle plate 40 is clamped between the limiting pins 303. The limiting pins 303 and the needle plate 40 can limit the needle plate 40 in at least two directions perpendicular to each other, thereby increasing the stability of the connection between the needle plate 40 and the fixed end 302. Preferably, the pinhole 401 is arranged at the geometric center of the needle plate 40, and the center needle 80 passes through the pinhole 401 and is fixedly connected to the needle plate 40. The pinhole 401 can limit the center needle 80 in the radial direction of the center needle 80, provide support force to the center needle 80 when the center needle 80 is subjected to radial force, and increase the tolerance of the center needle 80 to the radial force.

[0033] In one embodiment, the SMA connector 100 further includes a base 10 and a protective cover 20, wherein the base 10 is provided with a central cavity, wherein the central cavity is a through hole arranged along the axial direction of the base 10, wherein the protective cover 20 of the central cavity is sleeved on the periphery of the shell 30 from the connection end 301 toward the fixed end 302, wherein the base 10 is sleeved on the periphery of the protective cover 20, and further includes a box-shaped shielding cover 50, wherein the shielding cover 50 is accommodated and arranged in the central cavity, wherein the shielding cover 50 is arranged at one end of the central cavity close to the fixed end 302, wherein the shielding cover 50 is a hollow cavity structure with only one end open, wherein the opening faces the fixed end 302, and wraps the connection point between the center needle 80 and the shielding wire 60 in its hollow cavity; the shielding wire 60 0 includes a core wire 62 for signal transmission and an insulating shielding layer wrapped around the core wire 62. One end of the shielding wire 60 passes through the shielding cover 50 from the outside of the shielding cover 50 toward the fixed end 302 of the shell 30. The core wire 62 is fixedly connected to the pin plate. Preferably, the core wire is welded and fixed to the pin plate through a welding pad, so that the pin plate 40, the core wire 62, and the center pin 80 are fixedly connected. The core wire 62 and the center pin 80 are welded and fixed to the pin plate 40 through the welding pad, respectively, to increase the connection stability and reliability of the core wire 62 and the center pin 80. The core wire 62 and the center pin 40 can be effectively connected to form an electrical connection; the shielding layer is welded and fixed at the junction with the shielding cover 50, and the open end of the shielding cover 50 is welded and fixed to the fixed end 302 of the shell 30. The shielding cover 50 and the welding and fixing of the shielding cover 50 and the shielding layer can play a shielding and protective role in the signal transmission of the core wire 62. The protective cover 20 is made of insulating material. Preferably, the protective cover 20 is made of polytetrafluoroethylene.

[0034] In one embodiment, a seal 70 is further provided between the shielding cover 50 and the central cavity of the base 10. Preferably, the seal 70 is epoxy resin, and the seal 70 is formed by pouring epoxy resin into the gap between the shielding cover 50 and the inner wall of the central cavity. The seal 70 is used to seal the gap between the shielding cover 50 and the inner wall of the central cavity of the base 10, and plays a role of vacuum sealing.

[0035] In one embodiment, an annular groove 101 is provided at one end of the base 10 close to the connection end 301 of the housing 30, and a sealing ring 90 is provided in the annular groove 101. The sealing ring 90 is used to expand and seal the connection when the SMA connector 100 is connected to an external interface. Of course, in different application scenarios, a thread can be provided at one end of the base 10 close to the connection end 301 of the housing 30 instead of the annular groove 101 and the sealing ring 90.

[0036] When in use, the BNC connector 210 is connected to the front-end module, the SMA connector 100 is arranged on the top of the vacuum chamber, and the PIPS detector is installed or removed from the inside of the vacuum chamber. The connection end 301 of the SMA connector 100 is docked with the corresponding interface of the external device. The SMA connector 100 with the base 10 can be quickly connected to the external interface by direct insertion. The sealing ring 90 arranged on the base 10 forms a stable connection relationship with the external interface by expansion.

[0037] The SMA connector and PIPS detector connector provided by the utility model are designed to have the center pin pass through the needle plate and be fixedly connected to the needle plate, so that the needle plate can limit and fix the center pin in the radial direction of the center pin, thereby enhancing the radial tolerance of the center pin during use, and allowing the center pin of the SMA connector to be stably connected to the shielded core wire during repeated disassembly and use, thereby increasing the service life and reliability of the SMA connector.

[0038] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. An SMA connector (100), characterized in that: It comprises a shell (30) and a center needle (80) coaxially inserted into the shell (30), wherein one end of the shell (30) facing the external interface is a connecting end (301), and the other end is a fixed end (302) connected to the shielding wire (60), and the fixed end (302) is fitted with a needle plate (40), and the needle plate (40) is provided with a needle hole (401) corresponding to the center needle (80), and the center needle (80) is fixedly connected to the needle plate (40) after passing through the needle hole (401), and the needle plate (40) can limit and fix the center needle (80) along the radial direction of the center needle (80).

2. The SMA connector (100) according to claim 1, characterized in that: The fixed end (302) is provided with a limiting pin (303), and the limiting pin (303) can limit the needle plate (40) in the radial direction of the housing (30).

3. The SMA connector (100) according to claim 2, characterized in that: The limiting pins (303) are symmetrically arranged at the edge of the fixed end, and the needle plate (40) is clamped between the limiting pins (303). The limiting pins (303) can limit the needle plate (40) in at least two directions perpendicular to each other to prevent the needle plate (40) from radially displacing along the shell (30).

4. The SMA connector (100) according to claim 1, characterized in that: It also includes a box-shaped shielding cover (50) with an open end, the open end of the shielding cover (50) faces the fixed end (302) and is fixedly connected to the fixed end (302), and the shielding wire (60) passes through the shielding cover (50) from the outer periphery of the shielding cover (50) toward the fixed end (302) and is fixedly connected to the center pin (80).

5. The SMA connector (100) according to claim 4, characterized in that: The shielded wire (60) comprises a core wire (62) for signal transmission and an insulating shielding layer wrapped around the core wire (62), and the shielding cover (50) is fixed to the shielding layer of the shielded wire (60) by welding.

6. The SMA connector (100) according to claim 5, characterized in that: The center needle (80) is arranged opposite to the core wire (62) and is fixedly connected to the needle plate (40) by welding. The center needle (80) is electrically connected to the core wire (62).

7. The SMA connector (100) according to claim 4, characterized in that: The invention comprises a base (10), wherein the base (10) is coaxially sleeved on the periphery of the shell (30), and a protective sleeve (20) is coaxially sleeved between the base (10) and the shell (30).

8. The SMA connector (100) according to claim 7, characterized in that: An annular groove (101) is provided at one end of the base (10) facing the connecting end (301), and a sealing ring (90) is provided in the annular groove.

9. The SMA connector (100) according to claim 7, characterized in that: A sealing member (70) is provided between the shielding cover (50) and the base (10).

10. The SMA connector (100) according to claim 9, characterized in that: The sealing member (70) is epoxy resin.

11. The SMA connector (100) according to any one of claims 1 to 10, characterized in that: The needle plate (40) is made of polytetrafluoroethylene.

12. A PIPS detector connector (200), characterized in that: It comprises a shielded wire (60), one end of which is connected to a BNC connector (210), and the other end of which is connected to an SMA connector (100) according to any one of claims 1 to 11.

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