An inter-board radio frequency coaxial connector

Abstract

The utility model discloses a kind of inter-board radio frequency coaxial connectors, applied in PCB technical field, including sliding end socket, blind insertion connecting rod, locking end socket, the bottom of locking end socket and the top of sliding end socket is separately provided with PCB board and filter, the outer surface of sliding end socket is connected with the cavity thread of filter, the bottom of locking end socket is welded with the top of PCB board, the top and bottom of blind insertion connecting rod are all used symmetry structure and are connected with the bottom of sliding end socket and the top of locking end socket respectively.In the realization of high-power 250W (2.7GHz) inter-board radio frequency connection in the range of 9*9mm of PCB external contour size.At the same time, axial and radial mechanical tolerance ability are considered, signal integrity is excellent in the range of 6GHz and has certain shielding anti-interference ability.

Description

Technical Field

[0001] This utility model belongs to the field of PCB technology, and specifically relates to an inter-board radio frequency coaxial connector. Background Technology

[0002] An inter-board radio frequency coaxial connector is a connector used to directly transmit radio frequency signals between adjacent or close printed circuit boards (PCBs).

[0003] Currently, Chinese utility model patent CN209730365U discloses an inter-board radio frequency coaxial connector. In current board-to-board radio frequency connection applications, the rated radio frequency transmission power for boards with an outer contour dimension of 9*9mm or less is generally 180W (2.5GHz) or less. If the system requires a power capacity of 200W or more, the temperature rise and gradient change of the conductor and dielectric materials inside the connector will be accelerated, causing the metal parts to lose elasticity at high temperatures, the supporting dielectric to soften and deform, and in severe cases, it can easily lead to blackening of the PCB connection end and carbonization of the traces. While some connectors can achieve a power capacity of 200W or more, they may have small mechanical tolerances and radio frequency performance limited to 3GHz, failing to meet the application requirements. Utility Model Content

[0004] The purpose of this utility model is to provide an inter-board radio frequency coaxial connector that has the advantages of high power capacity, compact structure, and balanced mechanical and electrical performance.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: an inter-board radio frequency coaxial connector, including a sliding end socket, a blind mating connecting rod, and a locking end socket. The bottom of the locking end socket and the top of the sliding end socket are respectively provided with a PCB board and a filter. The outer surface of the sliding end socket is threadedly connected to the cavity of the filter. The bottom of the locking end socket is welded to the top of the PCB board. The top and bottom of the blind mating connecting rod adopt a symmetrical structure and are respectively connected to the bottom of the sliding end socket and the top of the locking end socket.

[0006] The above technical solution enables high-power 250W (2.7GHz) inter-board RF connections within a PCB outer contour area of ​​9*9mm. It also ensures axial and radial mechanical tolerance, excellent signal integrity within the 6GHz range, and a certain degree of shielding and anti-interference capability.

[0007] The present invention is further configured such that a sliding end insulator is fixedly connected inside the sliding end socket, and the sliding end insulator is made of a dielectric material of polytetrafluoroethylene and ceramic filler copolymer.

[0008] The above technical solution enables the sliding end insulator to have the advantages of low dielectric constant and high thermal conductivity, reducing insertion loss and maximizing the transfer of heat from the inner conductor to the outer shell.

[0009] The present invention is further configured such that a connecting rod end insulator is fixedly connected inside the blind insertion connecting rod, the connecting rod end insulator is an upper and lower spaced insulator, and is made of a dielectric material of polytetrafluoroethylene and ceramic filler copolymer.

[0010] The above technical solution can simultaneously fix the inner conductor and match the impedance, while also diffusing the Joule heat generated by the high-power current in both the axial and radial directions.

[0011] The present invention is further configured such that elastic grooved retaining rings are symmetrically welded to the top and bottom of the blind insertion connecting rod, wherein the elastic grooved retaining rings have a longer short groove, a wider narrow groove, and a higher number of grooves and a stronger retaining ring hardness.

[0012] The above technical solution makes the contact more reliable and also improves the shielding effectiveness within 6GHz.

[0013] The present invention is further configured such that the inner conductor end of the blind insertion connecting rod is provided with an inner large arc round chamfer, and the inner large arc round chamfer is a thickened flared mouth design.

[0014] Using the above technical solution, in addition to compensating for the impedance during axial tolerance, repeated insertion and removal are less likely to cause deformation.

[0015] The present invention is further configured such that a locking end insulator is embedded and fixedly connected inside the locking end socket, and the locking end insulator is made of LCP and ceramic filler copolymer dielectric material.

[0016] The above technical solution enables the locking end insulator to have the advantages of low high-temperature deformation, high strength, and high thermal conductivity, which can promptly dissipate the heat generated by the temperature rise of the PCB board to the shell and enhance the thermal conductivity of the solder pads.

[0017] In summary, this utility model has the following beneficial effects: Achieving high-power 250W (2.7GHz) inter-board RF connections within a PCB outer contour area of ​​9*9mm. It also ensures axial and radial mechanical tolerance, excellent signal integrity within the 6GHz range, and a certain degree of shielding and anti-interference capability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Reference numerals in the attached diagram: 1. Sliding end socket; 1.1. Sliding end insulator; 2. Blind-plug connecting rod; 2.1. Connecting rod end insulator; 2.2. Elastic grooved retaining ring; 2.3. Inner large-radius rounded chamfer; 3. Locking end socket; 3.1. Locking end insulator; 4. PCB board; 5. Filter. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings.

[0021] Example 1: refer to Figure 1 An inter-board radio frequency coaxial connector includes a sliding end socket 1, a blind mating connecting rod 2, and a locking end socket 3. A PCB board 4 and a filter 5 are respectively disposed at the bottom of the locking end socket 3 and the top of the sliding end socket 1. The outer surface of the sliding end socket 1 is threadedly connected to the cavity of the filter 5. The bottom of the locking end socket 3 is soldered to the top of the PCB board 4. The top and bottom of the blind mating connecting rod 2 adopt a symmetrical structure and are respectively connected to the bottom of the sliding end socket 1 and the top of the locking end socket 3. This connector achieves high-power 250W (2.7GHz) inter-board radio frequency connection within a PCB outer contour dimension of 9*9mm. It also considers axial and radial mechanical tolerance capabilities, provides excellent signal integrity within the 6GHz range, and has a certain degree of shielding and anti-interference capability.

[0022] refer to Figure 1 The sliding end socket 1 is internally fixedly connected to a sliding end insulator 1.1, which is made of a copolymer of polytetrafluoroethylene and ceramic filler dielectric material. This gives the sliding end insulator 1.1 the advantages of low dielectric constant and high thermal conductivity, reducing insertion loss and maximizing the transfer of heat from the inner conductor to the outer casing.

[0023] refer to Figure 1 The blind-plug connecting rod 2 is internally fixedly connected to a connecting rod end insulator 2.1. The connecting rod end insulator 2.1 adopts an upper and lower spaced insulator and is made of a dielectric material of polytetrafluoroethylene and ceramic filler copolymer. It can take into account both the fixation of the inner conductor and impedance matching, while diffusing the Joule heat generated by the high-power current in both axial and radial directions.

[0024] refer to Figure 1 The top and bottom of the blind-plug connector 2 are symmetrically welded with elastic grooved retaining rings 2.2. The elastic grooved retaining rings 2.2 have shorter grooves, wider grooves, a higher number of grooves, and enhanced ring hardness. This makes the contact more reliable and also improves the shielding effectiveness below 6GHz.

[0025] refer to Figure 1 The inner conductor end of the blind-fit connector 2 is provided with an inner large-radius rounded chamfer 2.3, which is a thickened flared design. In addition to compensating for impedance during axial tolerance, it is not easily deformed by repeated insertion and removal.

[0026] refer to Figure 1 The locking end socket 3 is internally embedded with a locking end insulator 3.1, which is made of LCP and ceramic filler copolymer dielectric material. This gives the locking end insulator 3.1 the advantages of low high-temperature deformation, high strength, and high thermal conductivity, which can effectively dissipate the heat generated by the temperature rise of the PCB board 4 to the shell and enhance the heat conduction at the solder pads.

[0027] Brief description of the usage process: First, during connection, the bottom of the blind-mating connecting rod 2 engages with the inner groove of the locking end socket 3 housing via the elastic grooved retainer 2.2, while the top connects with the sliding end socket 1 via the elastic grooved retainer 2.2 and transitions to contact with the inner wall through the cup-shaped guide. During separation, due to the different insertion and extraction forces, the connecting rod follows the locking end. This inter-plate connection scheme can provide an axial tolerance of + / -1.2mm and a radial tolerance of + / -1mm. Simultaneously, a sliding end insulator 1.1 and a connecting rod end insulator 2.1, made of polytetrafluoroethylene and ceramic filler copolymer dielectric material, are respectively installed inside the sliding end socket 1 and the blind-mating connecting rod 2. The sliding end insulator 1.1 reduces insertion loss and maximizes the transfer of heat from the inner conductor to the outer shell, while the connecting rod end insulator 2.1 balances inner conductor fixation and impedance matching, while also diffusing the Joule heat generated by high-power current axially and radially. Then, a locking end insulator 3.1 made of LCP and ceramic filler copolymer dielectric material is embedded inside the locking end socket 3. This gives the locking end insulator 3.1 the advantages of low high-temperature deformation, high strength, and high thermal conductivity, which can effectively dissipate the heat generated by the temperature rise of the PCB board 4 to the shell and enhance the thermal conductivity of the pads. This enables high-power 250W (2.7GHz) inter-board RF connection within a 9*9mm outer contour of the PCB. At the same time, it takes into account axial and radial mechanical tolerance, excellent signal integrity within the 6GHz range, and a certain degree of shielding and anti-interference capability.

[0028] It should be noted that parts have a lifespan and can be replaced during regular maintenance when they no longer meet performance requirements. Deterioration in performance due to prolonged use of parts is not a design defect of this application.

[0029] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. An inter-board radio frequency coaxial connector comprising a sliding end socket (1), a blind-mating connection stem (2), a locking end socket (3), characterized in that: The bottom of the locking socket (3) and the top of the sliding socket (1) are respectively provided with a PCB board (4) and a filter (5). The outer surface of the sliding socket (1) is threaded to the cavity of the filter (5). The bottom of the locking socket (3) is welded to the top of the PCB board (4). The top and bottom of the blind insertion connecting rod (2) are both symmetrical and are respectively connected to the bottom of the sliding socket (1) and the top of the locking socket (3).

2. An inter-board radio frequency coaxial connector as claimed in claim 1, characterized in that: The sliding end socket (1) is internally fixedly connected to a sliding end insulator (1.1), which is made of a dielectric material of polytetrafluoroethylene and ceramic filler copolymer.

3. An inter-board radio frequency coaxial connector as claimed in claim 1, wherein: The blind insertion connecting rod (2) is internally fixedly connected to a connecting rod end insulator (2.1). The connecting rod end insulator (2.1) is an upper and lower spaced insulator, and is made of a copolymer of polytetrafluoroethylene and ceramic filler dielectric material.

4. An inter-board radio frequency coaxial connector as recited in claim 1, wherein: The top and bottom of the blind insertion connecting rod (2) are symmetrically welded with elastic grooved retaining rings (2.2). The elastic grooved retaining rings (2.2) have a long short groove, a wide narrow groove, and a denser number of grooves and a stronger retaining ring hardness.

5. An inter-board radio frequency coaxial connector as recited in claim 1, wherein: The inner conductor end of the blind plug connector (2) is provided with an inner large arc round chamfer (2.3), which is a thickened flared mouth design.

6. An inter-board radio frequency coaxial connector as recited in claim 1, wherein: The locking end socket (3) is internally embedded with a locking end insulator (3.1), which is made of LCP and ceramic filler copolymer dielectric material.

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