Radio frequency coaxial adapter for connecting circuit board

Abstract

The utility model discloses a radio frequency coaxial adapter for connecting a circuit board, which comprises an inner conductor, a central medium and an outer conductor, the inner conductor comprises a first inner conductor and a second inner conductor, and the first inner conductor can move relative to the second inner conductor; the outer conductor has a first outer conductor and a second outer conductor, and the first outer conductor is also movable relative to the second outer conductor. According to the utility model, through flexible adjustment of the inner conductor and the outer conductor, the total length of the inner conductor can be accurately adjusted according to the change of the distance between the circuit boards so as to adapt to different connection requirements, meanwhile, a coaxial structure is ensured to be unchanged in a signal transmission process, the problems of signal reflection and loss are effectively avoided, and the service life of the connector is prolonged. The central medium ensures electrical isolation and impedance matching between the inner conductor and the outer conductor; therefore, according to the utility model, the specification requirement is simplified, the inventory and the cost are reduced, and the universality and the adaptability of the adapter are improved at the same time.

Description

Technical Field

[0001] This utility model relates to the field of radio frequency coaxial device technology, and in particular to a radio frequency coaxial adapter for connecting circuit boards. Background Technology

[0002] RF coaxial adapters are widely used and extremely important in circuit board connections; they play a key role not only in the internal structure of RF instruments (such as network analyzers and spectrum analyzers), but are also indispensable in the testing and signal transmission of external circuit boards.

[0003] Within an instrument, signal connections between multiple independent functional modules (such as RF front-ends, mixers, amplifiers, etc.) require high efficiency and low loss. Adapters ensure precise mating between modules, meeting impedance matching and signal integrity requirements. Simultaneously, adapters can convert onboard connectors (such as miniature coaxial interfaces) to standard interfaces (such as SMA and N-type), simplifying internal design, facilitating module maintenance and debugging, and optimizing signal path direction through bends or elongated designs, thus overcoming space constraints.

[0004] In external circuit board testing, RF adapters further demonstrate their versatility. For example, when a network analyzer measures the S-parameters of the circuit board under test, the adapter is used to adapt the interface and ensure test accuracy. The output of a signal source or vector signal generator is connected to an external device through an adapter to ensure signal transmission quality. The input of a spectrum analyzer uses an adapter to adapt to various signal sources, improving test compatibility and efficiency.

[0005] Through extensive use in internal and external connections, RF adapters effectively support adaptation to various interface types, optimize structural design, improve signal transmission quality and test reliability, and have become an important component in RF system design to enhance flexibility and performance.

[0006] Patent application CN106299780A discloses an inter-board radio frequency connection system, such as... Figure 1 As shown, it includes a clamping end socket 1 and a sliding end socket 3, both with tubular structures. The clamping end socket 1 and the sliding end socket 3 are respectively welded and fixed to printed circuit boards 6 arranged in parallel on opposite sides, forming a welding area at the welding point. Both printed circuit boards 6 have electrical contact areas 4 located within the welding area (see Figure 6). The electrical contact areas 4 are circular, elliptical, or other shaped metal layers. The inner holes of the clamping end socket 1 and the sliding end socket 3 are respectively coaxially aligned with the electrical contact areas 4 on the corresponding side circuit boards.

[0007] The radio frequency connection system between the plates adopts a three-piece connection of sockets at both ends and an adapter, aiming to not need the insulating support and the center conductor part inside the socket at both ends, but use the elastic center conductor as the center conductor of the adapter to directly electrically contact the electric contact area on the printed circuit board, so as to save the design space and the cost, realize the large-angle deflection of the adapter, and reduce the minimum plate spacing.

[0008] The utility model discloses a radio frequency coaxial button adapter, as shown in Figure 2 The utility model discloses a radio frequency coaxial button adapter, as shown in

[0009] The radio frequency coaxial button adapter adds the button conductor on the basis of the conventional KK adapter and improves the assembly structure, aiming to realize the vertical welding-free interconnection between the adapter and the printed circuit board.

[0010] Compared with the conventional adapter, the above two adapters have improvements, but they still have the same limitation as the conventional design, that is, the fixed length of the adapter. Due to the specification difference, even if the types are the same, it is difficult to adapt to the actual needs of different circuit boards, limiting its versatility and flexibility.

[0011] It can be seen that the prior art still needs to be improved and perfected. Utility model content

[0012] In view of the above problems, the purpose of the utility model is to provide a radio frequency coaxial adapter for connecting circuit boards, aiming to solve the problem that the length of the existing adapter is fixed, making it difficult to adapt to the actual needs of different circuit boards of the same type, and then leading to more required specifications of the adapter and higher cost.

[0013] The technical scheme of the utility model is as follows:

[0014] The utility model provides a radio frequency coaxial adapter for connecting circuit board, it includes: the inner conductor, center medium and outer conductor who arranges in turn from inside to outside, wherein, the inner conductor is provided with at least two, two inner conductors are first inner conductor and second inner conductor respectively, first inner conductor is movably arranged relative to second inner conductor, the outer conductor is provided with at least two, two outer conductors are first outer conductor and second outer conductor respectively, first outer conductor is movably arranged relative to second outer conductor.

[0015] The effect of the above scheme is that when the spacing between two circuit boards changes, the total length of the inner conductor can be adjusted by moving the first inner conductor or the second inner conductor to accurately cover the required connection distance, which not only simplifies the specification requirements of the adapter length, reduces the additional cost of multiple specifications due to fixed length, but also improves the versatility of the adapter.

[0016] In addition, through the movable arrangement of the first outer conductor and the second outer conductor, dynamic adjustment is realized at the outer conductor level, which is matched with the movable design of the inner conductor, further enhances the stable transmission capability of the radio frequency signal, ensures that the inner and outer conductors can maintain a coaxial state during length adjustment, and effectively avoids the increase of signal reflection or loss. At the same time, the design of the center medium ensures the insulation effect between the inner conductor and the outer conductor, which can maintain good electrical isolation and impedance matching even when the length changes.

[0017] Through the double movable design of the inner and outer conductors, the adapter can flexibly adapt to various circuit board connection requirements, which not only reduces the inventory pressure and cost, but also improves the assembly efficiency. Therefore, compared with the traditional radio frequency coaxial adapter with fixed length, the design of the utility model fundamentally overcomes the problems of single specification and poor adaptability, and has higher practical value and promotion potential in radio frequency circuit board connection.

[0018] In a further preferred embodiment, the radio frequency coaxial adapter further comprises a third outer conductor, the third outer conductor is sleeved on the outer edge of the second outer conductor, and a first moving groove is formed between the inner wall of the third outer conductor and the outer wall of the second outer conductor, and a first spring is arranged in the first moving groove; one end of the first outer conductor facing the second outer conductor is accommodated in the first moving groove, and the first spring is compressed to move towards the second outer conductor after being stressed.

[0019] The effect of the above scheme is that when the first outer conductor is pushed by external force, the end facing the second outer conductor can enter the first moving groove and compress the first spring therein, thereby realizing controllable movement in the direction of the second outer conductor. This design not only allows the adapter to automatically adapt to slight spacing changes during connection, but also ensures tight contact and stability after connection through the spring's rebound force. The first spring provides a flexible adjustment space when under stress, mitigating the impact of external force impact, while the rebound mechanism maintains a stable connection state, avoiding poor contact or signal transmission loss caused by external impact or vibration. More importantly, since signal transmission is determined by the spacing between the inner diameter of the outer conductor and the outer diameter of the inner conductor, the movement of the first outer conductor between the second outer conductor and the third outer conductor does not affect the inner diameter of the second outer conductor. Therefore, the movement adjustment of this structure does not negatively affect signal transmission performance, ensuring signal integrity and stability. Even with slight spacing errors during assembly, the spring's action can quickly adjust and correct the position, avoiding errors caused by manual adjustment and further improving assembly efficiency and signal quality. In addition, the addition of the third outer conductor forms an additional shielding layer when it surrounds the second outer conductor, optimizing the coaxial structure of the outer conductor and reducing losses caused by electromagnetic interference during radio frequency signal transmission.

[0020] In a further preferred scheme, the outer wall of the second outer conductor extends outwardly with a connecting disc, and the connecting disc is provided with a connecting hole, and the second outer conductor is connected with the circuit board through the connecting hole.

[0021] The effect of the above scheme is that during the adjustment stage, the compression and rebound of the first spring effectively alleviate the mechanical stress generated during movement. After the length is adjusted to the appropriate position, the connecting disc realizes the mechanical fixation of the second outer conductor and the circuit board through the connecting hole, providing stable support to prevent loosening or falling off due to external force or thermal expansion in subsequent use. At the same time, the fixed way of the connecting disc design also enhances the grounding performance of the second outer conductor, which, combined with its shielding effect, effectively suppresses electromagnetic interference in high-frequency signal transmission. In addition, the fixing step of the connecting disc simplifies the assembly process in complex scenarios, ensuring stable transmission of radio frequency signals while also providing convenience for repeated use of the adapter and maintenance of the circuit board.

[0022] In a further preferred scheme, the inner side of the end of the third outer conductor away from the second outer conductor is provided with a first protruding ring, and the outer side of the end of the first outer conductor facing the second outer conductor is provided with a second protruding ring, and the first protruding ring and the second protruding ring are adapted to form a limiting structure for preventing the first outer conductor from falling off.

[0023] The effect of the above scheme is that the first outer conductor can freely move within a set range by the cooperation of the first moving groove, the third outer conductor and the second outer conductor, to adapt to different circuit board connection requirements. In this case, the limiting structure formed by the first convex ring and the second convex ring ensures the free movement of the first outer conductor while providing protection against falling off to prevent the first outer conductor from falling off due to external force or vibration during adjustment. The limiting structure ensures that the first outer conductor can be firmly fixed at the required position after adjustment, thereby avoiding signal loss or instability caused by loose connection; it not only provides flexibility for the adjustment of the first outer conductor, but also avoids the loosening or falling off phenomenon that may occur during movement, ensuring the reliability of the adapter during connection and signal transmission. By effectively combining the flexible adjustment and anti-falling off functions, the adaptability and stability of the adapter are improved, especially in the radio frequency system that needs to be adjusted frequently or positioned accurately, the stable transmission of high-frequency signals can be ensured, and signal loss or interference caused by connection problems can be avoided.

[0024] In a further preferred scheme, a second moving groove is formed in one end of the second inner conductor facing the first inner conductor, and a second spring is arranged in the second moving groove; the first inner conductor is accommodated in the second moving groove at one end facing the second inner conductor, and compresses the second spring to move towards the second inner conductor after being stressed.

[0025] The effect of the above scheme is that the combination of the second moving groove and the second spring of the second inner conductor enables fine adjustment of the inner conductor under external force, thereby realizing precise length adjustment and position docking, not only enhancing the adaptability of the adapter to different circuit board connection requirements, but also avoiding signal reflection, loss or poor contact caused by position deviation of the inner conductor, thereby improving the integrity and transmission quality of the signal. In addition, by arranging the second spring, the mechanical stress that may occur during use is effectively relieved, avoiding accidental movement or loosening of the relative position between the inner conductors, which is beneficial to prolong the service life of the adapter. The second spring can also provide a constant pressure to the inner conductor to ensure stable contact performance, especially under vibration or external force, to ensure the stability of signal transmission.

[0026] In a further preferred scheme, at least two center media are provided, and the two center media are a first center medium and a second center medium, respectively. The first center medium and the second center medium are arranged at the inner edges of the first outer conductor and the second outer conductor, respectively, and the first center medium is fixed when the first outer conductor moves.

[0027] The effect of the above scheme is that by arranging the first central medium and the second central medium at the inner edges of the first outer conductor and the second outer conductor respectively, the inside of each outer conductor can stably support the corresponding inner conductor, thereby ensuring the coaxiality and spacing consistency between the inner conductor and the outer conductor in the signal transmission path. When the first outer conductor moves relative to the second outer conductor, the design of the first central medium being fixed avoids the risk of mispositioning or disengagement of the central medium due to movement, so that the adapter can still maintain the integrity and stability of the signal transmission path during dynamic adjustment, effectively preventing signal loss or performance degradation. In addition, the fixation of the first central medium also simplifies the structural design, decouples the relative position of the first outer conductor and the central medium, thereby reducing the assembly complexity and failure rate. At the same time, the independent arrangement of the first central medium and the second central medium can adapt to the movement characteristics of different outer conductors, so that the entire adapter has better mechanical adaptability and flexibility, so that the adapter can be applied to scenarios requiring high-precision signal transmission, such as high-frequency radio frequency systems and precision measurement instruments.

[0028] In a further preferred scheme, the inner diameter of the first central medium is greater than the outer diameter of the first inner conductor, so that an annular groove is formed between the first central medium and the first inner conductor for the movement of the first inner conductor.

[0029] The effect of the above scheme is that by forming an annular groove between the inner diameter of the first central medium and the outer diameter of the first inner conductor, a space is provided for the free movement of the first inner conductor relative to the first central medium, so that the first inner conductor can smoothly displace along the axial direction under the action of an external force. This arrangement not only meets the needs of dynamic adjustment of the adapter, but also ensures that there is no direct friction or interference between the first inner conductor and the first central medium during movement, thereby avoiding mechanical wear or blockage of the signal path caused by long-term use. At the same time, the presence of the annular groove provides a guiding effect for the first inner conductor, limiting the deviation during movement and ensuring that the first inner conductor always maintains good coaxiality with other conductors. In addition, this annular groove effectively separates the movement function of the first inner conductor and the support function of the first central medium, so that the adapter can still maintain the integrity and reliability of the signal transmission path during dynamic adjustment. Even if the first inner conductor moves within the annular groove, the core parameters of signal transmission (such as the spacing between the inner conductor and the outer conductor) can still remain constant, thereby avoiding signal loss or performance fluctuations caused by mechanical adjustment.

[0030] In a further preferred scheme, the radio frequency coaxial adapter further comprises a third inner conductor, the third inner conductor is provided with a first through hole facing one end of the second inner conductor and a second through hole facing away from one end of the second inner conductor, the diameter of the first through hole is greater than that of the second through hole to form a limiting step; the second spring is accommodated in the first through hole, and the limiting step is used for limiting the first inner conductor.

[0031] The effect of the above-mentioned scheme is that: by setting the first and second through holes on the third inner conductor and forming a limiting step with the larger diameter of the first through hole, the precise positioning of the first inner conductor is achieved. The limiting step effectively limits the excessive movement of the first inner conductor, preventing it from shifting inside the adapter, thereby ensuring the stability and coaxiality of the signal path. At the same time, the second spring is contained in the first through hole, which can provide appropriate elastic support when the first inner conductor is displaced due to external force, alleviate the impact of external impact or vibration, ensure that the first inner conductor can quickly return to its original position, thereby maintaining the reliability of the connection and the transmission quality of the signal. In addition, the design of the limiting step not only prevents the excessive sliding of the inner conductor, but also provides better mechanical stability for the assembly of the adapter, making the contact between the conductors more precise and avoiding poor contact or signal interference caused by excessive displacement. The presence of the second spring also plays a buffering role, which can absorb the instantaneous force impact caused by mechanical adjustment or external vibration, thereby reducing the signal transmission loss caused by vibration or impact.

[0032] In a further preferred scheme, an outer edge of the third inner conductor facing one end of the second inner conductor is formed with a positioning step, the positioning step abuts against the first central medium, and the positioning step divides the third inner conductor into a large-diameter end and a small-diameter end, the small-diameter end faces away from the second inner conductor and is accommodated in the annular groove.

[0033] The effect of the above-mentioned scheme is that: the positioning step not only provides stable physical support, but also ensures the precise docking between the conductors, thereby ensuring the stability and efficient transmission of the signal path. At the same time, the small-diameter end is accommodated in the annular groove, further avoiding signal loss or interference caused by movement or deviation of the inner conductor.

[0034] In addition, the positioning step effectively solves the problem of unnecessary contact between the conductors, so that the signal transmission channel remains clear and without spurious path, so that the size and gap of the conductor can be reasonably controlled, ensuring the coaxiality between the conductors, thereby reducing signal reflection and transmission loss. The presence of the annular groove provides a fitting space, ensuring the stability of the small-diameter end, while avoiding unnecessary friction or looseness between the conductors caused by excessive or insufficient gap, further improving the reliability and long-term stability of the adapter.

[0035] In a further preferred scheme, the second central medium is sleeved on the outer edge end of the second inner conductor, and the second central medium is flush with the end face of the second inner conductor. When the second inner conductor is a female connector, the second inner conductor is provided with a plurality of separation grooves, which divide the end of the second inner conductor into petal-shaped, and each petal body is extruded to gradually increase the diameter of the end of the second inner conductor from the end away from the first inner conductor to the end close to the first inner conductor.

[0036] The effect of the above scheme is that the petal body and the gradually increasing diameter arrangement can form better electrical contact when in contact, so that each petal body will generate uniform pressure with the corresponding contact surface when under pressure, thereby ensuring the close contact between the end head and the connector, and avoiding signal loss or reflection due to poor contact. Therefore, when the second inner conductor is a female head, the design of the separation groove enables the end head to flexibly adapt to physical deformation during plugging, thereby enhancing the stability and reliability of plugging. As the diameter of the end head gradually increases, a more stable contact interval can be formed, reducing the looseness or errors that may occur during plugging, and ensuring the connection reliability under long-term use.

[0037] Compared with the prior art, the radio frequency coaxial adapter for connecting circuit boards provided by the utility model includes an inner conductor, a center medium and an outer conductor, wherein the inner conductor has a first inner conductor and a second inner conductor, and the first inner conductor is movable relative to the second inner conductor; the outer conductor has a first outer conductor and a second outer conductor, and the first outer conductor is also movable relative to the second outer conductor. The utility model adjusts the inner and outer conductors flexibly, so that the total length of the inner conductor can be accurately adjusted according to the spacing between the circuit boards, thereby adapting to different connection requirements, while the coaxial structure in the signal transmission process is ensured unchanged, effectively avoiding the problems of signal reflection and loss, and the center medium ensures the electrical isolation and impedance matching between the inner and outer conductors; it can be seen that the utility model simplifies the specification requirements, reduces the inventory and cost, and improves the versatility and adaptability of the adapter. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 is the structural schematic view of the inter-board radio frequency connection system disclosed in CN106299780A.

[0039] Figure 2 is the structural schematic view of the radio frequency coaxial button adapter disclosed in CN216289369U.

[0040] Figure 3 is the cross-sectional view of the radio frequency coaxial adapter for connecting circuit boards provided by the utility model. DETAILED DESCRIPTION

[0041] The utility model provides a kind of radio frequency coaxial adapter for connecting circuit board, to make the purpose, technical scheme and effect of the utility model more clear, definite, the following referring to drawing and example is further detailed to the utility model.

[0042] The utility model relates to a kind of radio frequency coaxial adapter for circuit board connection, such as Figure 3As shown, it includes an inner conductor, a center medium and an outer conductor arranged in turn from inside to outside, wherein the inner conductor is provided with at least two, respectively the first inner conductor 110 and the second inner conductor 120, and the two have a relatively movable design; the outer conductor is also provided with at least two, respectively the first outer conductor 310 and the second outer conductor 320, and the two also have a relatively movable characteristic. Through this double-layer movable design, the inner and outer conductors not only can meet the connection needs of circuit boards of different distances, but also can maintain efficient connection during adjustment, that is, the adapter can dynamically change the total length of the inner conductor by adjusting the relative position of the first inner conductor 110 and the second inner conductor 120 when facing different circuit board spacings, so as to realize accurate adaptation of the connection length. This adjustability effectively simplifies the specification design of the radio frequency coaxial adapter, reduces the demand for multi-specification spare parts, reduces the pressure of inventory management, and improves the versatility of the adapter. In addition, the movability of the first outer conductor 310 and the second outer conductor 320, combined with the adjustment of the inner conductor, makes the inner and outer conductors always maintain a coaxial structure while changing in length, avoiding signal reflection or loss problems caused by adjustment. Through the reasonable design of the center medium, the electrical isolation and impedance matching between the inner and outer conductors are also ensured, further ensuring the stability of signal transmission.

[0043] It can be understood that dividing the inner conductor into the first inner conductor 110 and the second inner conductor 120 and setting it to be movable is the core feature of realizing dynamic adjustment of the total length. When the circuit board spacing changes, moving the first or second inner conductor 120 can accurately adjust the length, ensure the reliable transmission of radio frequency signals, and avoid the adaptation problem caused by fixed length. The movable design of the first outer conductor 310 and the second outer conductor 320 is well coordinated with the adjustment of the inner conductor, not only realizing dynamic adjustment at the outer conductor level, but also ensuring that the inner and outer conductors always maintain a coaxial structure during adjustment, avoiding the decline of radio frequency signal transmission performance due to deviation from the coaxial. The center medium is located between the inner and outer conductors, which ensures the electrical isolation and impedance matching of the two during adjustment. Even when the inner and outer conductors move, the center medium can still stably provide insulation function, avoiding signal interference and transmission performance reduction.

[0044] That is, the movable design of the inner conductor is the core of realizing dynamic length adjustment, and the movable design of the outer conductor ensures the coaxiality and stability of the structure. Combined with the electrical isolation function of the center medium, they together constitute a radio frequency coaxial adapter with flexibility and reliability, overcoming the shortcomings of traditional fixed-length adapters such as single specification and poor adaptability, and having higher practicality and promotional value.

[0045] Preferably, the adapter further comprises a third outer conductor 330, which is sleeved on the outer edge of the second outer conductor 320, and a first moving groove is formed between the outer wall of the second outer conductor 320 and the third outer conductor 330. The first moving groove is internally provided with a first spring 410, and one end of the first outer conductor 310 is accommodated in the first moving groove and can compress the first spring 410 under external force and move towards the second outer conductor 320. When the first outer conductor 310 is pushed by external force, the end portion thereof can enter the first moving groove, compress the first spring 410, and form controllable displacement towards the second outer conductor 320. The first spring 410 provides a flexible adjustment space, can alleviate the impact of external force when stressed, reduces direct damage to the structure, and realizes stable and close contact after connection through the springback force, not only improves the adaptability to small spacing errors in the assembly process, but also avoids the problems of poor contact or signal transmission loss caused by external force or vibration. At the same time, the spacing can be automatically adjusted due to the action of the spring, without the need for manual adjustment, which greatly improves the assembly efficiency and signal quality. In addition, the third outer conductor 330 increases a shielding layer by covering the second outer conductor 320, effectively optimizes the anti-interference performance of the radio frequency signal, and ensures the integrity and stability of signal transmission.

[0046] It can be understood that the third outer conductor 330 not only provides the structural basis of the first moving groove, but also increases a shielding protection layer when surrounding the second outer conductor 320, enhances the coaxial performance of the outer conductor, and further reduces the influence of electromagnetic interference on the signal, which is a key technical feature to improve signal quality. The first moving groove provides space for the movement of the first outer conductor 310, and cooperates with the spring to realize flexible adjustment, so that the adapter can adapt to different connection spacing changes, especially quickly adjust the connection position during assembly or operation, and ensure the reliability of connection. The first spring 410 is located in the first moving groove and has buffering and springback functions, and its flexible adjustment capability effectively alleviates the influence of external impact on the adapter, and ensures the tightness and stability of the connection through the springback force, which is the core of dynamic adjustment and reliable signal transmission. These components complement each other, so that the present scheme has significant advantages in the design of the radio frequency coaxial adapter.

[0047] Further, the second outer conductor 320 is provided with a connecting disc 510 extending outwardly on the outer wall thereof, and the connecting disc 510 is provided with a connecting hole 511, so that the second outer conductor 320 can be mechanically connected with the circuit board through the connecting hole 511. On the basis of keeping the overall structure of the adapter compact, a reliable fixing mode is provided for the adapter, so that the connection is more stable.

[0048] In use, the compression and rebound of the first spring 410 effectively alleviate mechanical stress during the adjustment phase, preventing excessive wear or deformation during structural movement. After adjustment, the second outer conductor 320 is securely connected to the circuit board through the fixing method of the connecting disc 510 and the connecting hole 511, providing stable mechanical support. This fixing method not only prevents loosening or falling due to external force impact or thermal expansion, but also further optimizes the shielding effect by enhancing the grounding performance, suppressing electromagnetic interference in high-frequency signal transmission. In addition, the design of the connecting disc 510 simplifies the installation steps, especially in complex application scenarios, improving assembly efficiency, while also providing convenience for the disassembly of the adapter and maintenance of the circuit board, thereby improving the overall performance and reliability of the device.

[0049] It is easy to understand that the connecting disc 510, as a connecting component between the outer conductor and the circuit board, not only provides the function of mechanical fixation, but also plays an important role in stabilizing the position of the outer conductor; its fixing method enhances the grounding performance of the outer conductor, combined with the shielding structure, achieving the improvement of the anti-interference ability of signal transmission. The connecting hole 511 provides the necessary interface for the fixation of the connecting disc 510, allowing the second outer conductor 320 to be connected to the circuit board in a reliable manner. Through screws or buckles, the presence of the connecting hole 511 simplifies the assembly steps and improves the stability of mechanical connection. The second outer conductor 320 extends out of the connecting disc 510, ensuring close combination with the circuit board without damaging its coaxial characteristics, providing flexibility for the installation and use of the adapter in different scenarios. The extension part reduces interference with the main conductor, maintaining the integrity of signal transmission. These components cooperate with each other to form a complete technical solution from adjustment to fixation, ensuring the balance of mechanical stability and signal transmission performance.

[0050] Preferably, the first protruding ring is designed on the inner side of the end of the third outer conductor 330 away from the second outer conductor 320, and the second protruding ring is set on the outer side of the end of the first outer conductor 310 facing the second outer conductor 320. The first protruding ring and the second protruding ring form a limiting structure that matches each other, preventing accidental falling of the first outer conductor 310 due to external force or vibration while achieving flexible adjustment.

[0051] By the limiting design of the first and second protruding rings, the first outer conductor 310 can freely move within the first moving groove within a set range, meeting the needs of different circuit board connection distances, while ensuring that it will not be removed from the structural limit due to external force or vibration during adjustment. This limiting structure provides reliable mechanical constraints, enabling the first outer conductor 310 to be securely maintained at the predetermined position after adjustment, effectively avoiding the risk of loose or falling connection, thereby ensuring the stability of the transmission of radio frequency signals. In addition, the limiting structure not only realizes flexible adjustment function, but also takes into account the mechanical stability, making the adapter capable of adapting to frequent adjustment or precise positioning application scenarios, avoiding signal loss or interference caused by connection problems, and providing protection for the stable operation of high-frequency radio frequency systems.

[0052] It is not difficult to imagine that the first protruding ring is located inside the third outer conductor 330, serving as a support point for the limiting structure. Its position design neither interferes with the movement of the first outer conductor 310 nor provides an important mechanical basis for the limiting function, ensuring the integrity and operability of the structure. The second protruding ring is designed on the outside of the first outer conductor 310, which, together with the first protruding ring, constitutes a key part of the limiting function. It not only allows the first outer conductor 310 to freely adjust within the moving range, but also provides effective anti-falling protection, enhancing the reliability of the adapter. The first and second protruding rings form a limiting mechanism that can meet the needs of free movement and prevent falling through precise adaptation. This design takes into account flexibility and stability, allowing the first outer conductor 310 to meet the adjustment needs while always maintaining a reliable mechanical connection state.

[0053] Therefore, the first and second protruding rings and the first moving groove work together to form a complete structural system that can be flexibly adjusted and prevented from falling. The cooperation of the first and second protruding rings provides the limiting function, while the first moving groove ensures the constraint of the moving range and the flexibility of the adjustment. The combination of the three not only achieves the balance between free adjustment and limiting protection, but also ensures the stable transmission of radio frequency signals in high-frequency systems, improving the practicality and reliability of the adapter as a whole.

[0054] Preferably, the second inner conductor 120 is provided with a second moving groove at one end facing the first inner conductor 110, and a second spring 420 is arranged in the groove. The end of the first inner conductor 110 facing the second inner conductor 120 is designed to be accommodated in the second moving groove and can compress the second spring 420 under external force to move in the direction of the second inner conductor 120, achieving precise adjustment between the inner conductors to meet the connection needs of different circuit board distances.

[0055] Through the coordinated design of the second moving groove and the second spring 420, the first inner conductor 110 can be flexibly adjusted in position under external force, accurately adapting to the required connection distance, effectively avoiding signal reflection and loss caused by connection position errors, and improving the integrity and reliability of radio frequency signal transmission. At the same time, the second spring 420 plays a buffering and rebounding role when stressed, not only reducing the long-term impact of mechanical stress on the inner conductor, but also providing constant pressure during the connection process to ensure stable and tight contact between the inner conductors. This design is particularly suitable for scenes with vibration or other external force interference, and can significantly improve the stability of signal transmission and the service life of the device.

[0056] It can be understood that the second moving groove provides a space to accommodate and constrain the movement of the first inner conductor 110, while ensuring that the movement range of the inner conductor is accurately controllable, avoiding structural loosening or signal interference caused by unnecessary movement. The main role of the second spring 420 is to provide a continuous rebound force for the first inner conductor 110, so that it automatically returns to position or maintains stable contact pressure after adjustment. In addition, the buffering function of the spring can absorb mechanical stress, preventing component fatigue or damage under long-term use, significantly improving the durability of the adapter. The first inner conductor 110 can be accommodated in the second moving groove and flexibly moved under the action of the second spring 420, achieving dynamic adjustment of the total length of the inner conductor, not only meeting the adaptation needs of different circuit board connections, but also avoiding signal distortion or transmission quality degradation through precise adjustment.

[0057] Therefore, the second moving groove, the second spring 420, and the design of the first inner conductor 110 cooperate with each other to form a dynamic adjustment function system. Among them, the second moving groove constrains the movement range of the first inner conductor 110, the second spring 420 provides a buffering and rebounding effect, and the mobility of the first inner conductor 110 ensures accurate adjustment of the length of the inner conductor. These features work together to not only improve the adaptability of the adapter in complex scenarios, but also effectively reduce the risk of failure caused by mechanical impact or vibration, further ensuring high-quality transmission of radio frequency signals and the reliability of the device.

[0058] In specific implementation, the center medium is provided as at least two, which are the first center medium 210 and the second center medium 220. These two center media are arranged at the inner edge positions of the first outer conductor 310 and the second outer conductor 320, respectively. Among them, the first center medium 210 remains fixed and does not displace with the movement of the first outer conductor 310, while the second center medium 220 is supported in coordination with the characteristics of the second outer conductor 320.

[0059] By arranging the first central medium 210 and the second central medium 220 at the inner edges of the first outer conductor 310 and the second outer conductor 320 respectively, stable support can be provided for the inner conductor within each outer conductor segment, ensuring that the coaxial structure and consistent spacing between the inner and outer conductors are maintained at all times. Good mechanical stability is provided on the signal transmission path, avoiding signal reflection or loss caused by the displacement of the outer conductor or the inner conductor. In addition, the first central medium 210 remains fixed when the first outer conductor 310 moves, effectively preventing the risk of dislocation or separation of the central medium due to movement, thereby ensuring the integrity and reliability of the signal transmission path. At the same time, the fixity of the first central medium 210 decouples the central medium from the movement of the outer conductor, reducing the complexity and difficulty of assembly, further improving the stability and operability of the adapter.

[0060] It is not difficult to imagine that the independently arranged first central medium 210 and the second central medium 220 respectively support the inner conductors of the first outer conductor 310 and the second outer conductor 320, which can accurately match the movement needs of different outer conductors while ensuring the stability of the signal transmission path. This arrangement improves the adaptability and flexibility of the adapter. The design of the first central medium 210 being fixed effectively prevents the displacement or dislocation of the central medium when the outer conductor moves, fundamentally avoiding the problem of transmission performance degradation caused by dislocation, while simplifying the component design and reducing the mechanical failure rate. By arranging the central medium at the inner edge of the outer conductor, the inner conductor can be better supported, the spacing between the inner and outer conductors can be maintained, and the impedance matching and coaxiality of the radio frequency signal transmission can be ensured. This is an important design to ensure signal integrity.

[0061] Therefore, the independent arrangement and positioning of the first central medium 210 and the second central medium 220 form a coordinated support system, each corresponding to the characteristics of different outer conductors, avoiding mutual interference during the movement of the outer conductors. The fixed nature of the first central medium 210 is decoupled from the movement design of the first outer conductor 310, not only ensuring the flexibility of the adapter, but also maintaining the stability of the structure during adjustment. The entire design achieves high-precision adjustment, low loss, and stability of the signal transmission path through the cooperation of the central medium, the outer conductor, and the inner conductor, suitable for high-frequency radio frequency and other application scenarios that require strict signal integrity.

[0062] Furthermore, the inner diameter of the first central medium 210 is designed to be larger than the outer diameter of the first inner conductor 110, thereby forming an annular groove between the two. The annular groove provides sufficient space for the axial movement of the first inner conductor 110, allowing it to move smoothly in the axial direction under the action of external force.

[0063] By forming an annular groove between the first center medium 210 and the first inner conductor 110, the first inner conductor 110 can freely move during the adapter's operation to adapt to different connection requirements, while avoiding friction and wear caused by direct contact between the inner conductor and the center medium. The design of the annular groove not only meets the needs of dynamic adjustment, but also ensures the coaxiality of the inner conductor with the outer conductor by limiting the movement trajectory of the inner conductor, avoiding signal reflection or transmission loss caused by deviation. In addition, this design separates the movement function of the inner conductor from the fixed support function of the center medium, so that the key parameters of the signal transmission path (such as the distance between the inner conductor and the outer conductor) can remain constant even during dynamic adjustment, ensuring the stability and integrity of signal transmission.

[0064] The annular groove provides a clear guiding function for the axial movement of the inner conductor, allowing it to move smoothly during adjustment and avoiding coaxiality problems caused by trajectory deviation. The design of the annular groove decouples the movement function of the inner conductor from the support function of the center medium, allowing the inner conductor to be fully supported during dynamic adjustment, thereby ensuring the stability and reliability of the signal transmission path. The ratio of the inner diameter of the first center medium 210 to the outer diameter of the first inner conductor 110 directly determines the size of the annular groove, not only providing space for the free movement of the first inner conductor 110, but also maintaining the coaxiality between the inner and outer conductors by limiting the movement path. At the same time, the guiding function of the annular groove ensures the smoothness of the inner conductor during adjustment, while the support function of the center medium further enhances the stability of the entire structure. This functionally separated design combines dynamic adaptability with signal stability, avoiding signal interference or performance fluctuations caused by imperfect mechanical structures during movement, and is suitable for high-frequency RF signal transmission and other scenarios with extremely high connection precision requirements.

[0065] Preferably, the adapter further comprises a third inner conductor 130, which is provided with a first through hole at one end facing the second inner conductor 120 and a second through hole at one end facing away from the second inner conductor 120. The diameter of the first through hole is larger than that of the second through hole, thereby forming a limiting step inside the third inner conductor 130. The second spring 420 is accommodated in the first through hole, and the limiting step is used to limit the movement range of the first inner conductor 110.

[0066] By designing the first and second through holes on the third inner conductor 130 and forming a limiting step, effective limiting of the first inner conductor 110 is achieved. This design prevents excessive movement of the first inner conductor 110, ensuring the coaxiality and stability of the signal transmission path, avoiding signal loss or poor connection due to excessive displacement. At the same time, the second spring 420 is accommodated in the first through hole, which can provide elastic support when the first inner conductor 110 moves due to external force, effectively buffering the influence of external vibration or impact on the inner conductor, helping the inner conductor to quickly recover to the original position, maintaining the high reliability of signal transmission. The presence of the limiting step not only provides protection for the precise limiting of the inner conductor, but also enhances the mechanical stability of the entire adapter, avoiding assembly problems or contact problems caused by excessive internal sliding. The buffering characteristics of the spring further enhance the adaptability of the adapter in dynamic environments, ensuring the integrity and quality of signal transmission in high-frequency or vibration scenarios.

[0067] The design of the first through hole diameter being larger than the second through hole forms a limiting step inside the third inner conductor 130, providing a clear movement boundary for the first inner conductor 110, avoiding mechanical instability and signal distortion caused by excessive sliding. The limiting step is a key feature that restricts the movement range of the first inner conductor 110, ensuring that its movement range is controlled, thereby maintaining the coaxiality of the signal transmission path and avoiding the influence of position deviation on signal quality. The elastic support of the second spring 420 not only provides movement buffering for the first inner conductor 110, but also absorbs external impact force, reducing the interference of vibration on the position of the inner conductor, improving the adaptability of the adapter under dynamic working conditions.

[0068] Preferably, the outer edge of the third inner conductor 130 is provided with a positioning step at the end facing the second inner conductor 120, which is in contact with the first central medium 210. The positioning step divides the third inner conductor 130 into a large-diameter end and a small-diameter end, with the small-diameter end facing away from the second inner conductor 120 and being accommodated in the annular groove. The design of the positioning step not only provides stable physical support for the third inner conductor 130, but also realizes precise butt joint with the first central medium 210, ensuring the alignment between the inner conductors and the stability of the signal transmission path. At the same time, the small-diameter end is accommodated in the annular groove, further limiting the lateral deviation or displacement of the inner conductor, effectively preventing the occurrence of signal reflection, loss or interference phenomena caused by conductor movement, thereby significantly improving the reliability and efficiency of signal transmission. The above settings optimize the connection and support between conductors, effectively ensuring the performance stability of the radio frequency system in high-frequency signal transmission scenarios.

[0069] Specifically, the second center medium 220 is sleeved on the outer edge end of the second inner conductor 120, and the end face is flush with the end face of the second inner conductor 120. When the second inner conductor 120 is a female head, a plurality of separation grooves are arranged on the end portion, which divides the end portion into a plurality of petals. The diameter of each petal gradually increases from one end away from the first inner conductor 110 to one end close to the first inner conductor 110, and can adapt to the deformation requirement of plugging when being extruded. Good electrical contact performance is realized through the separation grooves and the gradually increasing diameter. During the contact process, the petals can uniformly distribute the pressure when being extruded, and form stable physical and electrical connection with the corresponding contact surface, thereby effectively avoiding signal loss or reflection phenomenon caused by poor contact. The separation grooves endow the petals with a certain elasticity, so that the end of the second inner conductor 120 can flexibly adapt to the deformation during plugging, and significantly improve the stability and reliability during plugging. In addition, the gradually increasing diameter design of the end forms a more stable contact area, reduces the looseness or error that may be caused during plugging, and provides a guarantee for the signal transmission stability and connection reliability during long-term use.

[0070] In addition, those skilled in the art will appreciate that although some embodiments herein include certain features not included in other embodiments, the combination of features of different embodiments means that it is within the scope of the present application and forms different embodiments; for example, any one of the claimed embodiments can be used in any combination.

[0071] It should be noted that the above embodiments illustrate the present application rather than limit the present application, and those skilled in the art can design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs located between parentheses shall not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The application can be implemented by means of both hardware and software, being a suitably programmed computer. In a unit claim enumerating several means, several of these means can be embodied by one and the same item of hardware. The use of the words first, second and third, etc. does not imply any ordering. These words can be understood as names. The steps of those embodiments in the foregoing description do not have to be performed in the exact order described, unless otherwise specified.

Claims

1. A radio frequency coaxial adapter for connecting circuit boards, comprising: The inner conductor, the center medium and the outer conductor are arranged from inside to outside, characterized in that the inner conductor is provided with at least two, two inner conductors are respectively a first inner conductor and a second inner conductor, the first inner conductor is movably arranged relative to the second inner conductor; the outer conductor is provided with at least two, two outer conductors are respectively a first outer conductor and a second outer conductor, the first outer conductor is movably arranged relative to the second outer conductor.

2. The RF coaxial adapter for connecting circuit boards of claim 1, wherein, The radio frequency coaxial adapter further comprises a third outer conductor, the third outer conductor is sleeved on the outer edge of the second outer conductor, and a first moving groove is formed between the inner wall of the third outer conductor and the outer wall of the second outer conductor, and a first spring is arranged in the first moving groove; one end of the first outer conductor facing the second outer conductor is accommodated in the first moving groove, and the first spring is compressed to move towards the second outer conductor after being stressed.

3. The RF coaxial adapter for connecting circuit boards of claim 2, wherein, The outer wall of the second outer conductor extends outwardly to form a connecting disc, a connecting hole is formed in the connecting disc, and the second outer conductor is connected with the circuit board through the connecting hole.

4. The RF coaxial adapter for connecting circuit boards of claim 2, wherein, The inner side of one end of the third outer conductor away from the second outer conductor is provided with a first protruding ring, and the outer side of one end of the first outer conductor facing the second outer conductor is provided with a second protruding ring, the first protruding ring and the second protruding ring are matched to form a limiting structure for preventing the first outer conductor from falling off.

5. The RF coaxial adapter for connecting circuit boards of claim 1, wherein, A second moving groove is formed in one end of the second inner conductor facing the first inner conductor, and a second spring is arranged in the second moving groove; one end of the first inner conductor facing the second inner conductor is accommodated in the second moving groove, and the second spring is compressed to move towards the second inner conductor after being stressed.

6. The RF coaxial adapter for connecting circuit boards of claim 5, wherein, The center medium is provided with at least two, two center media are respectively a first center medium and a second center medium, the first center medium and the second center medium are arranged on the inner edges of the first outer conductor and the second outer conductor respectively, and the first center medium is fixed when the first outer conductor moves.

7. The RF coaxial adapter for connecting circuit boards of claim 6, wherein, The inner diameter of the first center medium is greater than the outer diameter of the first inner conductor, so that an annular groove is formed between the first center medium and the first inner conductor for the movement of the first inner conductor.

8. The RF coaxial adapter for connecting circuit boards of claim 7, wherein, The radio frequency coaxial adapter further comprises a third inner conductor, one end of the third inner conductor facing the second inner conductor is provided with a first through hole, and the other end of the third inner conductor away from the second inner conductor is provided with a second through hole, the diameter of the first through hole is greater than that of the second through hole to form a limiting step; the second spring is accommodated in the first through hole, and the limiting step is used for limiting the first inner conductor.

9. The RF coaxial adapter for connecting circuit boards of claim 8, wherein, The outer edge of one end of the third inner conductor facing the second inner conductor forms a positioning step, the positioning step abuts against the first center medium, and the positioning step divides the third inner conductor into a large-diameter end and a small-diameter end, the small-diameter end is away from the second inner conductor and is accommodated in the annular groove.

10. The RF coaxial adapter for connecting circuit boards of claim 6, wherein, The second center medium is sleeved on the outer edge of the second inner conductor, and the end surface of the second center medium is flush with that of the second inner conductor, when the second inner conductor is a female head, a plurality of separation grooves are formed in the second inner conductor, the plurality of separation grooves divide the end of the second inner conductor into petals, and the diameter of the end of the second inner conductor gradually increases from one end away from the first inner conductor to one end close to the first inner conductor through extrusion.

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