Radio frequency coaxial connector with automatic compensation structure

Abstract

The invention relates to a radio frequency coaxial connector with an automatic compensation structure. The radio frequency coaxial connector is used for direct insertion-screwing tool-free field installation of a smooth copper-clad aluminum pipe radio frequency cable. The connector shell is composed of a rear threaded shell body, a middle threaded shell body and a front threaded shell body, a blind hole is formed in the rear portion of the inner conductor, and the core wire can float in the hole to avoid crushing. According to the radio frequency coaxial connector with the automatic compensation structure, the rear portion of the inner conductor is supported by means of the two insulation supports of the insulation assembly, and in the process that the cable core wire is inserted into the insertion hole of the inner conductor, the cable core wire is inserted into the insertion hole of the inner conductor. Impedance can be automatically compensated, so that impedance matching of a product is guaranteed, and the voltage standing-wave ratio is reduced; and the insulation support of the product is not an inverted cone type tightening structure in the prior art, but clamps the cable core wire in a sliding manner, so that the stress of the connector insulator adopting the structure is relatively small, and the situation that the inner conductor cannot tighten the cable due to deformation is avoided.

Description

Technical Field

[0001] This invention relates to the field of radio frequency coaxial transmission, and in particular to a radio frequency coaxial connector for cable assembly with an automatic compensation structure. Background Technology

[0002] The RF coaxial connector with automatic compensation structure is designed for use in broadcast transmission networks to meet the application needs of the telecommunications industry. This connector is primarily used for equipment interconnection in broadcast backbones, facilitating the interconnection and transmission of RF signals. The successful development of this product further enhances the ease of installation and reliability of broadcast networks.

[0003] In existing technologies, pin-type RF connectors used in broadcast networks employ two inverted-conical insulators to lock the connector's inner conductor and cable core. This structure is prone to deformation due to prolonged stress on the insulators, leading to a failure to lock the cable core securely. Furthermore, during assembly, the two inverted-conical insulators slide against each other, gradually narrowing the connector's inner conductor socket to lock the cable core, resulting in displacement and deformation of internal components. This type of connector belongs to the RF coaxial connector category, with a typical operating frequency of 1.794 GHz. The primary factor affecting the transmission performance of RF coaxial connectors is impedance matching.

[0004] Because connectors operate by having the outer shell push the insulators, causing the two insulators fixing the inner conductor to deform under stress and in a free-flowing state, the inner conductor is brought in tighter to mesh with the cable core. This causes the impedance matching of the connector's internal circuitry to change from the nominal 75Ω, creating discontinuous capacitance and increasing the standing wave ratio (SWR). Furthermore, since the inner conductor's contraction relies on the insulators, these insulators will inevitably deform after a period of use. This will eventually lead to changes in the inner conductor's contraction size, making it unable to properly tighten the cable and affecting the connector's reliability. This will result in an increased SWR and a decrease in electrical performance indicators. Additionally, because the inner conductor's contraction relies on the insulators, these insulators will inevitably deform after a period of use, eventually causing changes in the inner conductor's contraction size and failing to properly tighten the cable, thus also affecting the connector's reliability.

[0005] Patent application number CN201010221981.4 discloses a radio frequency coaxial cable connector, belonging to the field of cable accessories technology. The connector includes a connector body and a cable sleeve connected end-to-end. The body contains a tubular metal shell, with insulators located on the inner walls of both ends. A female conductor is inserted through the center of each insulator. When a cable is inserted into the radio frequency coaxial cable connector, the center conductor of the cable connects to the female conductor at the center of the insulator, and its other end connects to the center conductor of other cables, thereby achieving a communication connection.

[0006] However, the aforementioned patented technologies cannot solve the defects in existing technologies, nor do they provide technical insights for solving existing problems. Therefore, there is an urgent need for a radio frequency coaxial connector with an automatic compensation structure that can meet the application needs of the communications industry and be applied to broadcast transmission networks, further improving the ease of installation and reliability of broadcast networks. Summary of the Invention

[0007] The purpose of this invention is to provide a radio frequency coaxial connector with an automatic compensation structure to solve the problems mentioned in the background art above:

[0008] (1) How to achieve continuous automatic impedance compensation throughout the entire insertion and locking stroke through structural adjustments.

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] A radio frequency coaxial connector with an automatic compensation structure;

[0011] Includes the outer casing, inner conductor, and insulating components;

[0012] The outer casing has a through hole that runs through its front and rear ends. The rear end of the inner conductor is in the through hole, the front end of the inner conductor extends out of the front side of the outer casing, and the rear end face of the inner conductor has a through hole for the cable core axis to move.

[0013] The insulating assembly includes a limiting insulating sleeve and at least one insulating support. The insulating support is fitted on the outside of the inner conductor, with its outer wall abutting against the inner wall of the outer casing's insertion through-hole and its inner wall abutting against the rear side wall of the inner conductor. The limiting insulating sleeve is also fitted on the outside of the inner conductor, with its outer wall abutting against the inner wall of the outer casing's insertion through-hole and its inner wall abutting against the rear side wall of the inner conductor.

[0014] Based on the above technical solution, the present invention can be further improved as follows.

[0015] Furthermore, the insertion through hole is divided into a limiting chamber, an assembly chamber, and an insertion chamber in sequence along the front and back direction. The insertion chamber can be matched with the cable body. The insulation support of the insulation component is located in the assembly chamber, and the insulation support limiting insulation sleeve of the insulation component is located in the limiting chamber.

[0016] Furthermore, the outer casing includes a rear housing, a middle housing, and a front housing. The rear housing can be fitted onto the cable. The rear housing and the middle housing are threaded together, and the front housing and the middle housing are also threaded together.

[0017] Furthermore, the insulating assembly includes two insulating supports, namely a first insulating support and a second insulating support. The first insulating support and the second insulating support are sequentially fitted onto the outside of the inner conductor in the front-to-back direction, and the first insulating support and the second insulating support are spaced apart in the axial direction of the inner conductor.

[0018] Furthermore, the insulation assembly also includes a movable insulating sleeve, which is also fitted onto the outside of the inner conductor. The movable insulating sleeve is located between the first insulating support and the second insulating support, and the length of the movable insulating sleeve is less than the axial distance between the first insulating support and the second insulating support.

[0019] Furthermore, it also includes a guide tube, which is disposed within the first insulating support and located behind the inner conductor. The inner hole of the guide tube communicates with the insertion hole of the inner conductor.

[0020] Furthermore, the rear part of the inner hole of the first insulating support is provided with a stepped groove that matches the outer contour of the guide tube.

[0021] This RF coaxial connector with an automatic compensation structure not only relies on two insulating supports of the insulating components to support the rear of the inner conductor, but also automatically compensates for impedance during the insertion of the cable core into the inner conductor's socket, thereby ensuring impedance matching and reducing the voltage standing wave ratio. Furthermore, the insulating supports of this product are not the inverted conical clamping structure of the prior art, but rather slide to clamp the cable core. Therefore, the insulator of the connector using this structure experiences less force and will not deform, thus preventing the inner conductor from failing to clamp the cable.

[0022] The beneficial technical effects of this RF coaxial connector with automatic compensation structure are as follows:

[0023] 1) Cable inner conductor fixing structure technology: This RF coaxial connector with automatic compensation structure is used to mate with smooth aluminum tube RF cables to form cable assemblies. The cable core is a smooth copper-clad aluminum tube structure. To facilitate workers' operation in the field, a direct plug-in mating and screw-on locking fixing structure is adopted.

[0024] 2) Automatic impedance compensation structure design technology: RF connectors transmit high-frequency signals. During the assembly and use of the product, there may be situations where the internal impedance of the connector is mismatched and parts slide. It is necessary to adopt a reasonable mechanism for the center contact and insulator to achieve automatic impedance compensation throughout the sliding process, which has good electrical and mechanical performance.

[0025] 3) Spread spectrum technology, which increases the cutoff frequency of the product. Attached Figure Description

[0026] Figure 1 This is a front view of an embodiment of an RF coaxial connector with an automatic compensation structure.

[0027] Figure 2 This is a cross-sectional view of the front housing, insulating components, and inner conductor in an embodiment of an RF coaxial connector with an automatic compensation structure.

[0028] Explanation of the labels in the diagram:

[0029] Rear housing - 110; Middle housing - 120; Front housing - 130; Insertion through hole - 140; Clamping mechanism - 141; Inner conductor - 200; Insertion hole - 210; First insulating support - 311; Insulating ring groove - 313; Second insulating support - 312; Movable insulating sleeve - 320; Limiting insulating sleeve - 330; Guide tube - 400; Cable - 500; Core wire - 510. Detailed Implementation

[0030] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] The terms “vertical,” “horizontal,” “left,” “right,” and similar expressions used in this document are for illustrative purposes only and do not represent the only possible implementation.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] Please refer to Figures 1 to 2.

[0034] This RF coaxial connector with automatic compensation structure includes a housing, an inner conductor 200, a guide tube 400, and an insulating component.

[0035] The outer casing includes a rear housing 110, a middle housing 120, and a front housing 130. The rear housing 110 and the middle housing 120 are threaded together, and the front housing and the middle housing 120 are also threaded together.

[0036] The inner holes of the rear housing 110, the middle housing 120 and the front housing 130 together form the insertion through hole 140. The insertion through hole 140 is divided into a limiting chamber, an assembly chamber and an insertion chamber along the front-to-back direction. The insertion chamber can cooperate with the main body of the cable 500. A clamping mechanism 141 is provided in the insertion chamber. The rear housing 110 and the middle housing 120 can be fitted onto the cable 500 through the clamping mechanism 141.

[0037] The rear opening of the insertion chamber is located on the rear end face of the outer shell, the insulating support of the insulating component is located in the assembly chamber, the insulating support limiting insulating sleeve 330 of the insulating component is located in the limiting chamber, and the front opening of the limiting chamber is located on the front end face of the outer shell.

[0038] The rear end of the inner conductor 200 is located in the insertion hole 140, the front end of the inner conductor 200 extends out of the front side of the outer shell, the outer diameter of the rear part of the inner conductor 200 is larger than the outer diameter of the front part of the inner conductor 200, and the rear end face of the inner conductor 200 has an insertion hole 210 that allows the core wire 510 of the cable 500 to move slightly along its axis.

[0039] The insulation assembly includes a limiting insulation sleeve 330, a movable insulation sleeve 320, and two insulation supports, namely a first insulation support 311 and a second insulation support 312. The first insulation support 311 and the second insulation support 312 are sequentially fitted onto the outer side of the inner conductor 200 in the front-to-back direction. The outer walls of the first insulation support 311 and the second insulation support 312 abut against the inner wall of the outer shell insertion hole 140, and the inner walls of the first insulation support 311 and the second insulation support 312 abut against the rear side wall of the inner conductor 200. The first insulation support 311 and the second insulation support 312 are spaced apart in the axial direction of the inner conductor 200. The inner wall of the first insulation support 311 also has an insulation annular groove 313.

[0040] The movable insulating sleeve 320 is also fitted on the outside of the inner conductor 200. The movable insulating sleeve 320 is located between the first insulating support 311 and the second insulating support 312. The length of the movable insulating sleeve 320 is less than the axial distance between the first insulating support 311 and the second insulating support 312.

[0041] The limiting insulating sleeve 330 is also fitted on the outside of the inner conductor 200. The outer wall of the limiting insulating sleeve 330 abuts against the inner wall of the outer shell insertion hole 140, and the inner wall of the limiting insulating sleeve 330 abuts against the rear side wall of the inner conductor 200.

[0042] The inner conductor 200, together with the limiting insulating sleeve 330, the movable insulating sleeve 320, the first insulating support 311, and the second insulating support 312 of the insulating components, constitutes a sliding drawer-type structure, which ensures that the impedance can be automatically compensated when the cable 500 is inserted, thereby ensuring the impedance matching of the product and reducing the voltage standing wave ratio.

[0043] The guide tube 400 is disposed inside the first insulating support 311. The guide tube 400 is located behind the inner conductor 200, and the inner hole of the guide tube 400 communicates with the insertion hole 210 of the inner conductor 200. The rear part of the inner hole of the first insulating support 311 is provided with a stepped groove that matches the outer contour of the guide tube 400.

[0044] The RF coaxial connector with automatic compensation structure has a sliding drawer-type structure in the insertion hole 140, which can automatically compensate for impedance, thereby ensuring impedance matching and reducing voltage standing wave ratio. In addition, the insulation support of this product is not the inverted conical clamping structure of the prior art, but a sliding clamping of the cable 500 core wire 510. Therefore, the insulator of the product with this structure is less stressed and will not deform, which would prevent the inner conductor 200 from being unable to clamp the cable 500.

[0045] In use, the outer conductor of the cable 500 is clamped by the clamping mechanism 141 in the rear housing, and then the rear housing 110 of the clamped cable 500 is screwed into the front housing 130 to clamp the core wire 510 of the cable 500, forming the cable 500 assembly.

[0046] To improve the operating frequency of the product, this RF coaxial connector with automatic compensation structure reduces the diameter of the inner and outer conductors and lowers the dielectric constant. This RF coaxial connector with automatic compensation structure introduces multiple media into the internal structure of the product, forming a hybrid medium. Through equivalent dielectric constant conversion, the dielectric constant can be reduced to 1.1, close to the dielectric constant of air, thereby improving the cutoff frequency of this RF coaxial connector with automatic compensation structure.

[0047] The limiting insulating sleeve 330, the movable insulating sleeve 320, and the two insulating supports of the insulating components form a labyrinth structure. This labyrinth structure introduces an air gap, reducing the distance from the inner diameter of the outer shell to the outer diameter of the inner conductor 200 mm. While maintaining electrical performance, the labyrinth structure has a smaller diameter for both the inner and outer conductors compared to existing products. This structure increases the cutoff frequency of existing products from 1.794 GHz to 8 GHz and provides excellent voltage standing wave ratio (VSWR).

[0048] The above description is only one embodiment of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the principle of the present invention, and these should also be considered to fall within the protection scope of the present invention.

Claims

1. A radio frequency coaxial connector with an automatic compensation structure, characterized in that: Includes the outer casing, inner conductor (200), and insulating components; The outer casing has a through hole (140) that runs through its front and rear ends. The rear end of the inner conductor (200) is located in the through hole (140). The front end of the inner conductor (200) extends out of the front side of the outer casing. The rear end face of the inner conductor (200) has a through hole (210) for the axis of the core wire (510) of the cable (500) to move. The insulating assembly includes a limiting insulating sleeve (330) and at least one insulating support. The insulating support is fitted on the outside of the inner conductor (200), with its outer wall abutting against the inner wall of the outer casing insertion hole (140) and its inner wall abutting against the rear side wall of the inner conductor (200). The limiting insulating sleeve (330) is also fitted on the outside of the inner conductor (200), with its outer wall abutting against the inner wall of the outer casing insertion hole (140) and its inner wall abutting against the rear side wall of the inner conductor (200).

2. The RF coaxial connector with automatic compensation structure according to claim 1, characterized in that: The insertion through hole (140) is divided into a limiting chamber, an assembly chamber and an insertion chamber along the front and back direction. The insertion chamber can be matched with the main body of the cable (500). The insulation support of the insulation component is located in the assembly chamber, and the insulation support limiting insulation sleeve (330) of the insulation component is located in the limiting chamber.

3. The RF coaxial connector with automatic compensation structure according to claim 1, characterized in that: The outer casing includes a rear housing (110), a middle housing (120), and a front housing (130). The rear housing (110) can be fitted onto the cable (500). The rear housing (110) and the middle housing (120) are threaded together, and the front housing and the middle housing (120) are also threaded together.

4. The RF coaxial connector with automatic compensation structure according to claim 1, characterized in that: The insulating assembly includes two insulating supports, namely a first insulating support (311) and a second insulating support (312). The first insulating support (311) and the second insulating support (312) are sequentially fitted on the outside of the inner conductor (200) in the front-back direction. The first insulating support (311) and the second insulating support (312) are spaced apart in the axial direction of the inner conductor (200).

5. The RF coaxial connector with automatic compensation structure according to claim 4, characterized in that: The insulation assembly also includes a movable insulating sleeve (320), which is also fitted on the outside of the inner conductor (200). The movable insulating sleeve (320) is located between the first insulating support (311) and the second insulating support (312). The length of the movable insulating sleeve (320) is less than the axial distance between the first insulating support (311) and the second insulating support (312).

6. The RF coaxial connector with automatic compensation structure according to claim 4, characterized in that: It also includes a guide tube (400), which is disposed inside the first insulating support (311). The guide tube (400) is located behind the inner conductor (200), and the inner hole of the guide tube (400) communicates with the insertion hole (210) of the inner conductor (200).

7. The RF coaxial connector with automatic compensation structure according to claim 6, characterized in that: The rear part of the inner hole of the first insulating support (311) is provided with a stepped groove that matches the outer contour of the guide tube (400).

8. The RF coaxial connector with automatic compensation structure according to claim 7, characterized in that: The inner wall of the first insulating support (311) also has an insulating ring groove (313).

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