Miniaturized coaxial radio frequency connector with high environmental tolerance
By adopting a high-temperature sheath made of silica fiber and self-cleaning components, the structural integrity and self-cleaning problems of traditional coaxial RF connectors in extreme high-temperature environments have been solved, thereby improving signal stability and electrical contact reliability.
Patent Information
- Application Number
- CN202511697517.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-19
- Publication Date
- 2026-02-27
AI Technical Summary
Traditional coaxial RF connectors and their cables struggle to maintain structural integrity and flexibility under extreme high-temperature environments, leading to heat transfer that causes internal insulation materials to decompose and electrical performance to deteriorate. Additionally, the connector core surface is prone to oxidation and lacks self-cleaning capabilities, resulting in poor contact and signal distortion.
The high-temperature sheath woven from silica fiber and the connection structure with built-in self-cleaning function are used. The silica fiber sheath remains flexible and blocks heat at high temperatures, and the self-cleaning component automatically removes the oxide layer and contaminants from the surface of the ferrule during insertion and removal.
It effectively blocks high-temperature conduction, ensures that the internal insulation material does not decompose, maintains signal stability, and ensures the cleanliness and reliability of the electrical contact interface through self-cleaning function, reducing the risk of contact resistance and signal distortion.
Smart Images
Figure CN121584339A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of radio frequency connector technology, specifically to a miniaturized coaxial radio frequency connector with high environmental tolerance. Background Technology
[0002] A miniaturized coaxial RF connector with high environmental tolerance, such as the SMPM-T series, has an IP67 / IP68 protection rating and can work stably under extreme conditions such as high humidity, salt spray, and high and low temperature shock. The center-to-center distance is only 5 mm, the weight of a single piece is about 1 g, and it supports frequencies up to 67 GHz. It is widely used in aerospace, military and high-density board blind mating systems. Traditional coaxial RF connectors and their cables face severe challenges in extreme high-temperature environments: their cable sheaths cannot maintain structural integrity and flexibility for long periods at 1100℃, leading to heat transfer that causes the internal insulation material to decompose and electrical performance to deteriorate; at the same time, the connector core surface is prone to oxidation and lacks self-cleaning function during insertion and removal, resulting in poor contact and signal distortion. Therefore, a miniaturized coaxial RF connector with high environmental tolerance is proposed to address the above problems. Summary of the Invention
[0003] The purpose of this invention is to provide a miniaturized coaxial RF connector with high environmental tolerance to solve the severe challenges faced by traditional coaxial RF connectors and their cables in extreme high-temperature environments: their cable sheaths are difficult to maintain structural integrity and flexibility for a long time at 1100℃, which leads to heat transfer causing the internal insulation material to decompose and the electrical performance to deteriorate; at the same time, the surface of the connector core is prone to oxidation and lacks self-cleaning function during insertion and removal, resulting in poor contact and signal distortion.
[0004] To achieve the above objectives, the present invention provides the following technical solution: A miniaturized coaxial RF connector with high environmental tolerance includes a female connector and a female connector adapted to the female connector. A sealing post is fixedly connected to one end of the female connector. An external thread is formed on the outer side of one end of the sealing post. A first sealing ring is fixedly connected to the outer side of the other end of the sealing post. A ferrule is fixedly connected to the other end of the sealing post. An external surface cleaning assembly is installed inside the female connector. The external surface cleaning assembly includes a rotating ring plate. An annular groove is formed in the middle of the outer side of the rotating ring plate. Blades are equidistantly installed in the annular groove. An internal rubber ring is fixedly connected inside the rotating ring plate. Arc-shaped cleaning blocks are equidistantly connected in the annular shape inside the internal rubber ring. Second sealing rings are installed on the outer sides of both ends of the rotating ring plate.
[0005] As a further optimization of the present invention, wherein: a wire is installed at one end of both the female plug and the male plug, a high-temperature sheath of silica fiber is installed on the outside of the wire, and the wire on the female plug side is fixedly connected to one end of the internal core of the female plug.
[0006] As a further optimization of the present invention, the silica fiber high-temperature sheath is woven from pure silica continuous fibers, with a silica content ≥96wt%, an average fiber diameter of 5–10μm, a tightly woven twill weave, and a unit area weight of 600–900g / m². 2 The silica fiber high-temperature sheath retains ≥60% of its tensile strength and ≤2% of its linear shrinkage after continuous exposure to 1100 ℃ for 2 hours. The surface of the silica fiber high-temperature sheath is treated with high-temperature oxidation to form a nano-scale oxide layer with a thickness of 50–200 nm, which is used to inhibit fiber strength degradation at high temperatures. The silica fiber high-temperature sheath remains flexible in the range of -60℃ to +1100℃ and can be repeatedly bent ≥5000 times without breaking.
[0007] As a further optimization of the present invention, the female plug includes a female plug body, the female plug body has a plug hole, an internal thread and a mounting groove inside, a support ring plate is installed at the bottom of the mounting groove, an exhaust hole and an air inlet hole are respectively opened at the upper and lower ends of the mounting groove, and a sealing gasket is installed on the outside of the mounting groove.
[0008] As a further optimization of the present invention, a conductive copper sleeve is installed inside the socket, the female plug-side wire is connected to the conductive copper sleeve installed inside the socket, and the socket and the mounting groove are coaxially arranged.
[0009] As a further optimization of the present invention, the sealing post is spirally connected to the internal thread of the female insert body through an external thread on the outside, and the inside of the female insert body is adapted to the sealing post.
[0010] As a further optimization of the present invention, the exhaust hole is a straight hole, the air inlet is an L-shaped hole, one end of the air inlet and exhaust hole is connected to the inside of the mounting groove, the other end of the air inlet is connected to the inside of the female plug body, and the other end of the exhaust hole is connected to the outside of the female plug body.
[0011] As a further optimization of the present invention, the rotating ring plate is rotatably connected to the inner wall of the mounting groove through a second sealing ring, and the rotating ring plate is rotatably connected to the supporting ring plate through a bearing.
[0012] As a further optimization of the present invention, the end of the cleaning block away from the center point of the rotating ring plate is roughened, and there are six cleaning blocks.
[0013] Compared with the prior art, the beneficial effects of the present invention are: In this invention, the use of a high-temperature sheath woven from silica fibers and a connection structure with built-in self-cleaning function achieves significant beneficial effects: First, the high-temperature sheath of silica fibers acts like a flexible "ceramic armor," effectively blocking the conduction of external high temperatures of 1100°C to the inside of the connector, ensuring that the internal insulation material remains below its decomposition threshold. This fundamentally avoids signal degradation caused by insulation damage, achieving highly stable insertion loss even after extreme high temperatures (e.g., increment < 0.05 dB@18 GHz after 1100°C × 2 h). Second, the unique self-cleaning component automatically drives the cleaning block to rotate during insertion and removal using the pneumatic effect inside the connector, gently removing the oxide layer or contaminants from the ferrule surface. This ensures the cleanliness and reliability of the electrical contact interface during each connection, effectively reducing the risk of contact resistance and signal distortion. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the female insert of the present invention; Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This is a schematic diagram of the surface cleaning component structure of the present invention.
[0015] In the diagram: 1. Sub-insert; 2. High-temperature sheath made of silica fiber; 3. Wire; 4. Insert; 5. Sealing post; 6. First sealing ring; 7. Female connector; 71. Female connector body; 72. Socket; 73. Internal thread; 74. Support ring plate; 75. Sealing gasket; 76. Air inlet; 77. Exhaust outlet; 78. Mounting groove; 8. External surface cleaning assembly; 81. Rotating ring plate; 82. Internal rubber ring; 83. Cleaning block; 84. Second sealing ring; 85. Ring groove; 86. Blade. Detailed Implementation
[0016] Please see Figures 1-4 The present invention provides a technical solution: A miniaturized coaxial RF connector with high environmental tolerance includes a female connector 1 and a female connector 7 adapted to the female connector 1. A sealing post 5 is fixedly connected to one end of the female connector 1. An external thread is provided on the outer side of one end of the sealing post 5. A first sealing ring 6 is fixedly connected to the outer side of the other end of the sealing post 5. A core 4 is fixedly connected to the other end of the sealing post 5. An outer surface cleaning assembly 8 is installed inside the female connector 7. The outer surface cleaning assembly 8 includes a rotating ring plate 81. An annular groove 85 is provided in the middle of the outer side of the rotating ring plate 81. Blades 86 are installed in an annular pattern at equal intervals inside the annular groove 85. An internal rubber ring 82 is fixedly connected inside the rotating ring plate 81. An arc-shaped cleaning block 83 is fixedly connected in an annular pattern at equal intervals inside the internal rubber ring 82. A second sealing ring 84 is installed on the outer side of both ends of the rotating ring plate 81.
[0017] As a further implementation of this solution, a wire 3 is installed at one end of both the female plug 1 and the female plug 7. A silica fiber high-temperature sheath 2 is installed on the outside of the wire 3. The wire 3 on the side of the female plug 1 is fixedly connected to one end of the core 4 inside the female plug 1. Through the above settings, the connection stability between the wire 3 and the female plug 1 and the female plug 7 can be guaranteed, and the outside of the wire 3 can be protected by the silica fiber high-temperature sheath 2. As a further technical solution to this scheme, the silica fiber high-temperature sheath 2 is woven from pure silica continuous fibers, with a silica content ≥96wt%, an average fiber diameter of 5–10μm, a tight twill weave structure, and a unit area weight of 600–900g / m². 2 ; After being continuously exposed at 1100 ℃ for 2 hours, the silica fiber high-temperature sheath 2 retains a tensile strength of ≥60% and a linear shrinkage of ≤2%; The surface of the silica fiber high-temperature sheath 2 is treated with high-temperature oxidation to form a nano-scale oxide skin layer with a thickness of 50–200 nm, which is used to inhibit the degradation of fiber strength at high temperatures. The silica fiber high-temperature sheath 2 maintains flexibility within the range of -60℃ to +1100℃, and can be repeatedly bent ≥5000 times without breakage. The silica fiber high-temperature sheath is directly sleeved on the outside of the conductor 3, which can raise the temperature resistance of the cable to 1100℃ in one go without modifying the whole machine. Utilizing its dense twill weave structure of ≥96% pure SiO2, it forms a flexible "ceramic armor" that blocks the conduction of heat to the connector metal shell and central conductor in transient flame or plasma scouring areas such as near rocket engines, blast furnace electrode arms, or aircraft engine compartments. This keeps the internal PTFE / ETFE insulation layer below the decomposition threshold of 260℃, avoiding standing wave jumps and signal leakage. At the same time, it suppresses the deposition of high-temperature oxide layer volatiles at the interface, maintains a long-term stable 50Ω characteristic impedance, and the insertion loss increment after 1100℃×2h is <0.05 dB@18 GHz, achieving "plug and play" life extension of high-temperature RF links. As a further implementation of this solution, the female insert 7 includes a female insert body 71. The female insert body 71 has an insertion hole 72, an internal thread 73 and a mounting groove 78 inside. A support ring plate 74 is installed at the bottom of the mounting groove 78. An exhaust hole 77 and an air inlet hole 76 are respectively opened at the upper and lower ends of the mounting groove 78. A sealing gasket 75 is installed on the outside of the mounting groove 78. Through the above settings, the rotating ring plate 81 can be stably positioned, and the blade 86 can be driven by the cooperation of the air inlet hole 76, the exhaust hole 77 and the mounting groove 78. As a further implementation of this solution, a conductive copper sleeve is installed inside the socket 72. The wire 3 on the side of the female plug 7 is connected to the conductive copper sleeve installed inside the socket 72. The socket 72 and the mounting groove 78 are coaxially arranged, which can further improve the stability of the female plug 7 during use. As a further implementation of this solution, the sealing column 5 is spirally connected to the internal thread 73 of the female plug body 71 through the external thread on the outside. The internal part of the female plug body 71 is adapted to the sealing column 5. Through the above setting, the stability of the connection between the male plug 1 and the female plug 7 after completion can be further improved. As a further implementation of this solution, the exhaust hole 77 is a straight hole, the air inlet 76 is an L-shaped hole, one end of the air inlet 76 and the exhaust hole 77 are connected to the inside of the mounting groove 78, the other end of the air inlet 76 is connected to the inside of the female plug body 71, and the other end of the exhaust hole 77 is connected to the outside of the female plug body 71. With the above arrangement, the gas inside the female plug body 71 can be used to drive the rotating ring plate 81. As a further implementation of this solution, the rotating ring plate 81 is rotatably connected to the inner wall of the mounting groove 78 through the second sealing ring 84, and the rotating ring plate 81 is rotatably connected to the support ring plate 74 through the bearing. Through the above arrangement, the sealing effect between the rotating ring plate 81 and the mounting groove 78 is further improved. As a further implementation of this solution, the end of the cleaning block 83 away from the center point of the rotating ring plate 81 is roughened. There are six cleaning blocks 83, which can slightly treat the surface of the core 4 during the connection of the male plug 1 and the female plug 7, so as to prevent the oxide layer on the surface of the core 4 from affecting the connection of the equipment.
[0018] Workflow: When using the miniaturized coaxial RF connector with high environmental tolerance, first install the female connector 7 on the device side. After installation, insert the communication side sub-connector 1 into the female connector 7. During the insertion process, the ferrule 4 and the sealing post 5 first enter the female connector body 71. At the beginning of entry, the sealing column 5 forms a sealed space with the inside of the female plug body 71 through the first sealing ring 6 set on the outside. The gas inside the female plug 7 enters the mounting groove 78 through the air inlet 76. After the gas is discharged into the mounting groove 78, it drives the blade 86 and the rotating ring plate 81 to rotate, and then discharges the gas through the exhaust port 77. During this process, the cleaning block 83 cleans the oxide layer on the surface of the plug core 4 by rotating, so as to ensure the stability of the connection between the plug core 4 and the conductive copper sleeve. As the male insert 1 continues to be inserted, once the external thread on one side of the sealing post 5 contacts the internal thread, the male insert 1 is controlled to rotate and connect with the female insert 7, thus achieving a stable connection between the male insert 1 and the female insert 7. At the same time, the side of the sealing post 5 away from the male insert 1 compresses and deforms the sealing gasket 75, which is used to further improve the sealing effect after the male insert 1 and the female insert 7 are connected.
[0019] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.
Claims
1. A miniaturized coaxial radio frequency connector with high environmental tolerance, characterized in that, Includes a female plug (1) and a female plug (7) that is compatible with the female plug (1). One end of the female plug (1) is fixedly connected to a sealing post (5). One end of the sealing post (5) is provided with an external thread. The other end of the sealing post (5) is fixedly connected to a first sealing ring (6). The other end of the sealing post (5) is fixedly connected to a core (4). The female connector (7) is equipped with an external surface cleaning component (8); The outer surface cleaning assembly (8) includes a rotating ring plate (81), with an annular groove (85) in the middle of the outer side of the rotating ring plate (81). Inside the annular groove (85), blades (86) are installed in an annular shape at equal intervals. Inside the rotating ring plate (81), an internal rubber ring (82) is fixedly connected. Inside the internal rubber ring (82), an arc-shaped cleaning block (83) is fixedly connected in an annular shape at equal intervals. Second sealing rings (84) are installed on the outer sides of both ends of the rotating ring plate (81).
2. The miniaturized coaxial RF connector with high environmental tolerance according to claim 1, characterized in that: Both the female plug (1) and the male plug (7) are equipped with wires (3) at one end. A high-temperature sheath (2) of silica fiber is installed on the outside of the wires (3). The wires (3) on the side of the female plug (1) are fixedly connected to one end of the core (4) inside the female plug (1).
3. The miniaturized coaxial RF connector with high environmental tolerance according to claim 1, characterized in that: The silica fiber high-temperature sheath (2) is woven from pure silica continuous fibers with a silica content ≥96wt%, an average fiber diameter of 5–10μm, a tight twill weave structure, and a unit area weight of 600–900g / m². 2 ; After the silica fiber high-temperature sheath (2) is continuously exposed at 1100 ℃ for 2 hours, the tensile strength retention rate is ≥60% and the linear shrinkage rate is ≤2%; The surface of the silica fiber high-temperature sheath (2) is subjected to high-temperature oxidation treatment to form a nano-scale oxide layer with a thickness of 50–200 nm, which is used to suppress fiber strength degradation at high temperatures. The silica fiber high-temperature sheath (2) remains flexible in the range of -60℃ to +1100℃ and can be repeatedly bent ≥5000 times without breaking.
4. The miniaturized coaxial RF connector with high environmental tolerance according to claim 1, characterized in that: The female plug (7) includes a female plug body (71), which has a plug hole (72), an internal thread (73) and a mounting groove (78) inside. A support ring plate (74) is installed at the bottom of the mounting groove (78). An exhaust hole (77) and an air inlet hole (76) are respectively opened at the upper and lower ends of the mounting groove (78). A sealing gasket (75) is installed on the outside of the mounting groove (78).
5. A miniaturized coaxial RF connector with high environmental tolerance according to claim 4, characterized in that: A conductive copper sleeve is installed inside the socket (72). The female plug (7) side wire (3) is connected to the conductive copper sleeve installed inside the socket (72). The socket (72) and the mounting groove (78) are coaxially arranged.
6. A miniaturized coaxial RF connector with high environmental tolerance according to claim 1, characterized in that: The sealing column (5) is spirally connected to the internal thread (73) of the female insert body (71) through the external thread on the outside. The inside of the female insert body (71) is adapted to the sealing column (5).
7. A miniaturized coaxial RF connector with high environmental tolerance according to claim 4, characterized in that: The exhaust hole (77) is a straight hole, the air inlet (76) is an L-shaped hole, one end of the air inlet (76) and the exhaust hole (77) are connected to the inside of the mounting groove (78), the other end of the air inlet (76) is connected to the inside of the female plug body (71), and the other end of the exhaust hole (77) is connected to the outside of the female plug body (71).
8. A miniaturized coaxial RF connector with high environmental tolerance according to claim 1, characterized in that: The rotating ring plate (81) is rotatably connected to the inner wall of the mounting groove (78) through the second sealing ring (84), and the rotating ring plate (81) is rotatably connected to the support ring plate (74) through the bearing.
9. A miniaturized coaxial RF connector with high environmental tolerance according to claim 1, characterized in that: The cleaning block (83) has a rough surface at one end away from the center point of the rotating ring plate (81), and there are six cleaning blocks (83).