High-airtightness low-intermodulation radio frequency connector

Abstract

The utility model discloses a high-airtightness low-intermodulation radio frequency connector, and belongs to the technical field of radio frequency connector production. The connector comprises a male head outer conductor; the male head outer conductor comprises a shell, a connecting plate and a threaded boss, an inner core cavity is formed in the center, a sealing cavity is formed in one side of the inner core cavity, and an interface chamber is formed in the other side of the sealing cavity; the female head outer conductor comprises a connection chamber and a cable chamber, the center of the female head outer conductor is a through cable passage, and the connection chamber is in threaded connection outside the threaded boss; and the sealing block is arranged in the sealing cavity. According to the high-airtightness low-intermodulation radio frequency connector, the accuracy of the positions of the sealing block and the sealing piece can be ensured by preassembling the sealing piece in the male head outer conductor, the sealing effect is ensured, the installation process is simplified, the installation efficiency is improved, and in addition, the airtightness and the connection strength can be further improved by adopting welding wire filling; in addition, through the connection between the preassembled inner core and the cable, the intermodulation distortion can be obviously reduced, and the signal quality of the system is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to radio frequency connector technical field, especially a kind of high air-tightness low intermodulation radio frequency connector. BACKGROUND

[0002] Under the background of the rapid development of modern communication technology, radio frequency connector plays a vital role in the field of wireless communication, satellite communication, radar system and so on. As a microwave interface component, radio frequency connector not only must be able to transmit high-quality radio frequency signals, but also needs to effectively suppress the generation of intermodulation signals, while having reliable and stable connection mechanism.

[0003] In a kind of application scenarios needing to consider sealing and needing the cooperation between large connector and thin cable, the traditional radio frequency connector design usually adopts the connection mode of welding contact pin directly inserted, directly inserts cable into connector by slotting, this design, although it simplifies the connection process to some extent, the insertion of contact pin will cause the problem of unstable intermodulation between signals, lead to the significant increase of intermodulation distortion of cable signal, thereby affecting signal quality, reduce the overall performance of system, in addition, the slotting insertion mode will also lead to the insufficient sealing and connection stability of cable side. In the face of these challenges, especially in high frequency, high power environment, the design of connector needs to find a better connection mode among sealing, stability and electrical performance. For this purpose, we propose a kind of high air-tightness low intermodulation radio frequency connector to solve the above problems. SUMMARY

[0004] The utility model aims at providing a kind of high air-tightness low intermodulation radio frequency connector, to solve the problems, such as signal intermodulation distortion, insufficient sealing, poor connection stability of existing radio frequency coaxial connector in high frequency, high power application.

[0005] To solve the above technical problems, the utility model provides a kind of high air-tightness low intermodulation radio frequency connector, including male outer conductor;The male outer conductor is annular straight cylinder, including shell, the connecting plate being arranged in the shell one side, and the threaded boss being arranged in the connecting plate other side;Male outer conductor center is the inner core cavity passing through the threaded boss, the sealing cavity towards the shell one side, the interface chamber of the sealing cavity other side;

[0006] Female outer conductor, the female outer conductor is also annular straight cylinder, including connecting chamber and cable chamber, female outer conductor center is the cable passage passing through, connecting chamber inner wall is equipped with thread, connecting chamber is connected in threaded boss outer, and female outer conductor is sleeved in male outer conductor outer;

[0007] Sealing block, the sealing block is arranged in sealing cavity.

[0008] Preferably, the connecting chamber comprises a welding hole penetrating through both ends of the connecting chamber, and the welding hole fills the gap between the connecting chamber and the outer wall of the threaded boss by melting the welding wire to achieve a sealing effect.

[0009] Preferably, the sealing block comprises a penetrating inner core passage, a first sealing groove arranged on the outer wall of the sealing block, and a second sealing groove arranged on the inner wall of the inner core passage.

[0010] Preferably, the connecting plate comprises a third sealing groove arranged on the side facing the outer conductor of the female head, and a connecting hole arranged on the edge thereof.

[0011] Preferably, the shell comprises connecting threads arranged on the outer wall thereof for threaded connection with a receiving device.

[0012] Preferably, the outer wall of the connecting chamber is provided with a pair of parallel contact surfaces for facilitating disassembly with a disassembly tool.

[0013] Compared with the prior art, the high-air-tightness and low-intermodulation radio frequency connector has the following beneficial effects:

[0014] 1. The pre-assembly of the sealing block in the outer conductor of the male head ensures the accuracy of the position of the sealing block and the sealing sheet, ensures the sealing effect, and greatly simplifies the installation process and improves the overall installation efficiency;

[0015] 2. The melting of the welding wire to fill the gap between the connecting chamber and the outer wall of the threaded boss helps to form a more compact sealing structure, further improves the air tightness of the connector, and in addition, the welding wire filling also enhances the mechanical strength of the connection, ensures the stability and reliability of the connector under various working conditions;

[0016] 3. Compared with the traditional welding contact pin direct insertion connection method, the connector of the present application can effectively avoid the impedance mismatching and non-linear problems caused by poor welding or connection quality through the connection between the pre-assembled inner core and the cable, thereby significantly reducing the intermodulation distortion and improving the signal quality of the system. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the overall structure explosion schematic diagram of the high-air-tightness and low-intermodulation radio frequency connector provided by the present application;

[0018] Figure 2 is a sectional half view of a high-air-tightness low-intermodulation radio frequency connector provided by the utility model;

[0019] Figure 3 is a front view of a high-air-tightness low-intermodulation radio frequency connector provided by the utility model;

[0020] In the drawing: 1, male head outer conductor; 101, shell; 101a, connecting thread; 102, connecting plate; 102a, third sealing groove; 102b, connecting hole; 103, threaded boss; 104, inner core cavity; 105, sealing cavity; 106, interface chamber; 2, female head outer conductor; 201, connecting chamber; 201a, welding hole; 201b, contact surface; 202, cable chamber; 203, cable passage; 3, sealing block; 301, inner core passage; 302, first sealing groove; 303, second sealing groove. DETAILED DESCRIPTION

[0021] The utility model makes further detailed description in combination with the drawings and specific embodiments. According to the following description and claims, the advantages and features of the utility model will be more clear. It should be noted that the drawings all adopt very simplified form and all use non-precise proportion, only to facilitate, clear and assist the purpose of describing the embodiment of the utility model.

[0022] In the description of the utility model, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more.

[0023] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, term '' install '' '' link '' '' connection '' should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through intermediate medium, can be two elements inside the communication。For ordinary skilled person in the art, the above-mentioned terms can be understood by the specific meaning in the utility model through specific circumstances. Embodiment

[0024] The utility model provides a kind of high air-tight low intermodulation radio frequency connector, please refer to Figures 1-2 , including male outer conductor 1;The male outer conductor 1 is annular straight cylinder, including shell 101, the connecting plate 102 being arranged in the shell 101 one side, and the threaded boss 103 being arranged in the connecting plate 102 other side;Male outer conductor 1 center is the inner core cavity 104 through the threaded boss 103, the inner core cavity 104 is sealed cavity 105 towards shell 101 one side, the other side of the sealed cavity 105 is interface chamber 106;Female outer conductor 2, the female outer conductor 2 is also annular straight cylinder, including connecting chamber 201 and cable chamber 202, female outer conductor 2 center is the cable passage 203 through, connecting chamber 201 inner wall is provided with thread, connecting chamber 201 is connected in threaded boss 103 outer, and female outer conductor 2 is fitted in male outer conductor 1 outer;Sealing block 3, the sealing block 3 is arranged in sealed cavity 105.

[0025] Specifically, please refer to Figure 3 , the connecting chamber 201 includes the welding hole 201a being completely through in both ends thereof, the welding hole 201a is filled by melting welding wire the gap between connecting chamber 201 and threaded boss 103 outer wall, realizes sealing effect;The sealing block 3 includes the inner core passage 301 being completely through, the first sealing groove 302 being arranged in the outer wall of the sealing block 3, and the second sealing groove 303 being arranged in the inner wall of the inner core passage 301;The connecting plate 102 includes the third sealing groove 102a being arranged in its towards female outer conductor 2 one side, and the connecting hole 102b being arranged in its edge;The shell 101 includes the connecting thread 101a being arranged in its outer wall, for being connected with receiving device thread;The outer wall of connecting chamber 201 is provided with a pair of parallel contact surface 201b, convenient for using dismounting tool to dismount.

[0026] It should be noted that the male outer conductor 1 and the female outer conductor 2 are made of stainless steel material, which has excellent corrosion resistance and high mechanical strength, and is more suitable for the working environment of the radio frequency connector. The connecting plate 102 is square and has chamfers at four corners. The connecting plate 102 includes a ring-shaped third sealing groove 102a and connecting holes 102a arranged at four corners. The connecting holes 102a are used to be fixed with a cable connector mounting member. The center of the connecting plate 102 is a threaded boss 103. An outer thread is arranged on the outer wall of the threaded boss 103. The outer thread is matched with an inner thread of the connecting chamber 201, and the threaded boss 103 is connected with the connecting chamber 201 through screwing.

[0027] Preferably, the inner core cavity 104 is a columnar and elongated cavity penetrating through the threaded boss 103. The sealing cavity 105 is also columnar and is used to mount the sealing block 3. The receiving device is inserted into the male outer conductor 1 along the interface chamber 106, and finally is fixed through the connecting thread 101a on the outer wall of the shell.

[0028] Preferably, the outer wall of the sealing block 3 is provided with two first sealing grooves 302. The inner wall of the inner core passage 301 is also provided with two second sealing grooves 302. The sealing grooves are used to insert sealing sheets. The sealing sheets are tightly attached to the inner wall of the sealing cavity 105, so that the air-tight effect is achieved. The multi-sealing structure not only enhances the sealing performance, but also ensures more reliable and durable sealing effect.

[0029] Preferably, the cable passage 203 penetrating through the center of the female outer conductor 2 is communicated with the inner core cavity 104. A pair of welding holes 201a penetrating through the upper and lower ends of the connecting chamber 201 are arranged. The welding holes 201a are used to melt welding wires to fill the gap between the outer wall of the connecting chamber 201 and the threaded boss, so as to realize sealing. The contact surface 201b is a pair of flush surfaces. The surface of the contact surface 201b has anti-skid characteristics, so as to enhance the friction between the dismounting tool and the contact surface 201b, and realize quick dismounting.

[0030] In summary, the radio frequency connector with high air-tightness and low intermodulation according to the present application is characterized in that the sealing block is pre-mounted in the male outer conductor, the inner core is exposed from the inner core cavity, the sealing block is locked in the sealing cavity during pre-mounting, the pre-mounting is completed through the cooperation of the sealing sheets and the sealing grooves, the cable in the cable passage of the inner core is connected with the inner conductor after the pre-mounting is completed, the threaded boss is screwed with the connecting chamber to be locked, and finally the gap between the outer wall of the connecting chamber and the threaded boss is filled with the melted welding wires from the welding holes to realize sealing.

[0031] The sealing block and the sealing sheet are preassembled in the outer conductor of the male head, so that the accuracy of the positions of the sealing block and the sealing sheet is ensured, the sealing effect is ensured, the installation process is greatly simplified, and the overall installation efficiency is improved; the gap between the connecting chamber and the outer wall of the threaded boss is filled by the melted welding wire, which helps to form a more compact sealing structure, further improves the air tightness of the connector, and in addition, the welding wire filling also enhances the mechanical strength of the connection, ensuring the stability and reliability of the connector under various working conditions; compared with the traditional welding contact pin direct insertion connection mode, the new connector can effectively avoid the impedance mismatch and nonlinearity problems caused by poor welding or connection quality through the connection between the preassembled inner core and the cable, thereby significantly reducing the intermodulation distortion and improving the signal quality of the system.

[0032] The above description is only a description of the preferred embodiments of the utility model, and does not limit the scope of the utility model in any way, and any modification or modification of the above disclosure by a person skilled in the art belongs to the protection scope of the claims.

Claims

1. A high air-tightness low-intermodulation radio frequency connector, characterized in that, The utility model relates to a connector, which comprises: a male outer conductor (1), which is in the shape of a ring-shaped straight cylinder and comprises an outer shell (101), a connecting plate (102) arranged on one side of the outer shell (101), and a threaded boss (103) arranged on the other side of the connecting plate (102); the male outer conductor (1) has a core cavity (104) passing through the threaded boss (103) in the center, the core cavity (104) has a sealed cavity (105) on the side of the outer shell (101), and the sealed cavity (105) has an interface chamber (106) on the other side; a female outer conductor (2), which is also in the shape of a ring-shaped straight cylinder and comprises a connecting chamber (201) and a cable chamber (202), the female outer conductor (2) has a cable passage (203) passing through the center, the connecting chamber (201) has threads on the inner wall, and the connecting chamber (201) is connected to the outside of the threaded boss (103) through the threads, so that the female outer conductor (2) is fitted on the outside of the male outer conductor (1); a sealing block (3), which is arranged in the sealed cavity (105).

2. A high air-tightness low-intermodulation radio frequency connector as claimed in claim 1, characterized in that, The connecting chamber (201) comprises a welded hole (201a) passing through both ends of the connecting chamber (201), the welded hole (201a) fills the gap between the connecting chamber (201) and the outer wall of the threaded boss (103) by melting a welding wire, and thus achieves a sealing effect.

3. A high air-tight, low intermodulation radio frequency connector as claimed in claim 2, wherein, The sealing block (3) comprises a core passage (301) passing through the sealing block (3), a first sealing groove (302) arranged on the outer wall of the sealing block (3), and a second sealing groove (303) arranged on the inner wall of the core passage (301).

4. A high air-tightness low-intermodulation radio frequency connector as claimed in claim 3, characterized in that, The connecting plate (102) comprises a third sealing groove (102a) arranged on the side of the connecting plate (102) facing the female outer conductor (2), and a connecting hole (102b) arranged on the edge of the connecting plate (102).

5. A high air-tightness low-intermodulation radio frequency connector as claimed in claim 1, characterized in that, The outer shell (101) comprises a connecting thread (101a) arranged on the outer wall of the outer shell (101) and used for threaded connection with a receiving device.

6. A high air-tightness low-intermodulation radio frequency connector as claimed in claim 1, characterized in that, The outer wall of the connecting chamber (201) is provided with a pair of parallel contact surfaces (201b), so that the connecting chamber (201) can be easily disassembled by using a disassembling tool.

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