A high frequency connector

Abstract

The utility model discloses a kind of high-frequency connectors, belong to connector technical field.To solve the technical problem that existing high-frequency connector relies on metal terminal and passive control impedance of plastic medium, leading to poor control accuracy, large parasitic loss, the utility model provides a kind of high-frequency connector, comprising: a pedestal (10);And at least one signal tab (20) contained in the pedestal (10).Its key is, the signal tab (20) itself is configured as a printed circuit board (PCB), the PCB includes an insulating base material (21) and an electrically conductive layer (22) arranged on the insulating base material (21), the electrically conductive layer (22) is configured to form high-frequency transmission line structure.The utility model replaces traditional metal terminal by using PCB signal tab, changes impedance control into active structural design, to realize accurate impedance matching, effectively reduce signal loss and parasitic inductance, and can adapt to the high-frequency signal transmission demand above 25G.

Description

Technical Field

[0001] This utility model relates to the field of connector technology, and in particular to a high-frequency connector. Background Technology

[0002] Currently, high-frequency connectors on the market typically connect to the input and output PCBs via a single, integrated plastic housing. In this traditional design, signal transmission relies on solid metal terminals encased within the plastic base.

[0003] The drawback of this design is that the continuity of its impedance is passively and collaboratively controlled by multiple factors, such as the conductivity of the metal terminals, the dielectric constant (Dk) and dielectric loss (Df) of the plastic base. This passive control method has poor precision, is prone to generating large parasitic inductance and signal loss, and makes it difficult to achieve precise impedance control.

[0004] With the continuous improvement of data communication speeds, such as 25G, 56G, and even 112G applications, the requirements for impedance control accuracy of connectors are becoming increasingly stringent. Traditional connectors that rely on the mating of plastic and metal terminals are no longer sufficient to meet the demands for stable transmission of high-frequency signals. Furthermore, there are currently no high-frequency connectors on the market that use PCB board structures to replace traditional plastic and metal terminals. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a high-frequency connector to solve the problems of inaccurate impedance control, large parasitic effects, and difficulty in adapting to higher frequency (such as 25G and above) signal transmission in the prior art.

[0006] To solve the above-mentioned technical problems, this utility model provides a technical solution:

[0007] A high-frequency connector, characterized in that it comprises: a base (10); and at least one signal insert (20) housed in the base (10), the signal insert (20) itself being configured as a printed circuit board; the signal insert (20) comprises: an insulating substrate (21); and a conductive layer (22) disposed on the insulating substrate (21), the conductive layer (22) being configured as a high-frequency transmission line structure.

[0008] Preferably, the high-frequency transmission line structure is selected from: microstrip structure or stripline structure.

[0009] Preferably, the high-frequency connector includes a plurality of signal inserts (20); the plurality of signal inserts (20) include at least two different high-frequency transmission line structures.

[0010] Preferably, at least two signal inserts (20) with different high-frequency transmission line structures are configured to adapt to different signal impedances.

[0011] Preferably, the signal insert (20) further includes solder pads (23) for surface mount technology (SMT) with an external PCB.

[0012] Preferably, the base (10) includes a plurality of base units (11) and a plug-in interface (12); each base unit (11) is used to accommodate at least one of the signal plugs (20); two plug-in interfaces (12) are arranged vertically, and each plug-in interface (12) is provided with a conductive part (13).

[0013] Preferably, the signal insert (20) is provided with two conductive terminals (24) arranged vertically. The conductive terminals (24) are electrically connected to the conductive layer (22). When the signal insert (20) is inserted into the base unit (11), the conductive terminals (24) contact the conductive part (13).

[0014] Preferably, the conductive part (13) comprises a plurality of conductive units (131) stacked together, wherein the conductive unit (131) is a groove and a conductive sheet (132) is disposed in the groove.

[0015] Preferably, the base (10) further includes a grounding plug or shielding layer for shielding.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] Impedance controllable: This invention creatively uses "PCB signal inserts" to replace traditional "metal terminals". Since the PCB itself (insulating substrate + conductive layer) is a composite structure, designers can actively and precisely design high-frequency transmission lines (such as microstrip lines and striplines) on the PCB inserts, thereby achieving precise control of impedance, instead of passively relying on the dielectric constant of the plastic.

[0018] Superior performance: The PCB insert structure can effectively reduce external wiring, significantly reduce parasitic inductance and signal loss caused by traditional metal terminals, and is more suitable for high-frequency signal transmission.

[0019] Heterogeneous integration: Multiple signal inserts with different PCB structures can be integrated in the same connector base to simultaneously adapt to signals with different impedances (such as 100 ohms differential, 50 ohms single-ended, etc.), providing high flexibility.

[0020] High-frequency compatibility: Based on the above advantages, the high-frequency connector of this utility model can be effectively adapted to high-frequency products with frequencies of 25G and above on the market. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below:

[0022] Figure 1 This is a three-dimensional schematic diagram of a high-frequency connector provided in an embodiment of the present invention.

[0023] Figure 2 yes Figure 1 The diagram shows an exploded three-dimensional view of the high-frequency connector.

[0024] Figure 3 yes Figure 2 Schematic diagram of the structure of different types of signal inserts.

[0025] Figure 4 yes Figure 3 A cross-sectional schematic diagram of the first type of signal insert (insert ①).

[0026] Figure 5 yes Figure 3 A cross-sectional schematic diagram of the second type of signal insert (insert ②).

[0027] Figure 6 yes Figure 3 A cross-sectional schematic diagram of the third type of signal insert (insert ③).

[0028] Figure 7 This is a schematic diagram of the back structure of the base.

[0029] 10 Base, 20 Signal insert, 11 Base unit, 21 Insulating substrate, 12 Socket, 22 Conductive layer, 13 Conductive part, 23 Solder foot, 131 Conductive unit, 24 Conductive terminal, 132 Conductive sheet. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0031] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "center," "longitudinal," "lateral," "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0034] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0035] Please see Figures 1 to 7 This utility model embodiment provides a high-frequency connector.

[0036] In one specific implementation, such as Figure 1 and Figure 2 As shown, the high-frequency connector includes a base (10) and at least one signal insert (20) housed in the base (10).

[0037] The core innovation of this utility model is that the signal plug (20) is no longer a traditional solid metal terminal, but is constructed as a printed circuit board (PCB).

[0038] Please refer to the following for details. Figure 4 , Figure 5 and Figure 6 The diagram shows the cross-sectional structure of the signal insert (20). The signal insert (20), as a PCB, naturally includes an insulating substrate (21) and a conductive layer (22) disposed on the insulating substrate (21). The insulating substrate (21) (e.g., FR-4 or higher frequency substrate) performs the insulation and support functions of traditional plastic; the conductive layer (22) (e.g., copper foil) performs the signal transmission function of traditional metal terminals.

[0039] The key point is that the conductive layer (22) is patterned. By precisely designing the trace width, shape, and relative relationship (such as thickness) of the conductive layer (22) to the insulating substrate (21), the conductive layer (22) is constructed into a high-frequency transmission line structure.

[0040] In a preferred embodiment, the high-frequency transmission line structure can be a microstrip or stripline structure, both well-known in the art. This structure can confine the electromagnetic field to a specific region, thereby achieving precise control over the characteristic impedance.

[0041] Please see Figure 3 , Figure 4 , Figure 5 and Figure 6 In a preferred embodiment, the high-frequency connector may include a plurality of the signal tabs (20). To accommodate complex signal transmission requirements, these signal tabs (20) may include at least two types of tabs with different high-frequency transmission line structures (e.g., Figure 3 The inserts shown are ①, ②, and ③.

[0042] like Figures 4 to 6 As shown, different inserts can have different PCB stack-up structures or different conductive layer (22) sizes (e.g., different size parameters such as 3.05, 3.75, 2.35 as shown in the figure). These signal inserts (20) with different structures are configured to adapt to different signal impedances (e.g., insert ① for 50-ohm single-ended signals, insert ② for 100-ohm differential signals, etc.). This allows the connector to achieve integrated transmission of heterogeneous signals within a single housing.

[0043] Please refer to it again. Figures 4 to 6 The lower end of the signal plug (20) is preferably provided with a solder pad (23). The solder pad (23) is used to solder the signal plug (20) to an external PCB (e.g., an input PCB or an output PCB) using a surface mount technology (SMT) process to achieve reliable electrical connection and mechanical fixation.

[0044] Please see Figure 2The base (10) can be designed as a modular structure, comprising multiple stackable base units (11) (corresponding to...). Figure 2 (See slices ①, ②, and ③ in the exploded view). Each base unit (11) is used to accommodate and position at least one of the signal inserts (20).

[0045] The base (10) is also provided with a plug-in interface (12) (for example, in Figure 1 (The connector front end is shown). In one embodiment, two of the aforementioned connectors (12) may be arranged vertically. Each connector (12) has a conductive part (13) for electrical connection with the other end of the signal plug (20).

[0046] Please refer to the following: Figure 2 , Figure 3 To achieve the connection between the signal insert (20) and the interior of the base (10), the signal insert (20) is provided with two conductive terminals (24) arranged vertically at its insertion end (e.g., the upper end). The conductive terminals (24) are extensions or electrically connected portions of the conductive layer (22). When the signal insert (20) is assembled (e.g., inserted) into the base unit (11), the conductive terminals (24) come into contact with the conductive portion (13) within the insertion interface (12), thereby establishing an electrical connection.

[0047] To ensure a stable and reliable connection between the conductive terminal (24) and the conductive part (13), the conductive part (13) can be designed to consist of multiple conductive units (131) stacked together. For example, the conductive unit (131) can be designed as a groove structure, and a flexible conductive sheet (132) is provided in the groove. When the conductive terminal (24) of the signal plug (20) is inserted into the groove, it will make elastic contact with the conductive sheet (132), ensuring low contact resistance and vibration resistance.

[0048] To further enhance the high-frequency performance of the connector and suppress crosstalk and electromagnetic interference (EMI) between signals, the base (10) may also include a grounding tab or a shielding layer. The grounding tab may also be in the form of a PCB tab and is disposed between the signal tabs (20) to provide a ground (GND) plane. The shielding layer may be disposed outside or inside the base (10) to form a Faraday cage to shield against external interference.

[0049] In summary, the core idea of ​​this invention is to use a "PCB signal insert (20)" that can precisely design high-frequency transmission lines (such as microstrip lines and striplines) to completely replace the "solid metal terminal + plastic covering" structure in traditional high-frequency connectors. This transforms the impedance control of the connector from passively relying on material properties to actively designing the structure, thereby significantly improving the accuracy of impedance control, reducing parasitic effects and signal loss, and enabling it to meet the stable transmission requirements of high-frequency signals above 25G.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A high-frequency connector, characterized in that, include: A base (10); and at least one signal insert (20) housed in the base (10), the signal insert (20) itself being configured as a printed circuit board; The signal insert (20) includes: an insulating substrate (21); And a conductive layer (22) disposed on the insulating substrate (21), the conductive layer (22) being configured as a high-frequency transmission line structure.

2. The high-frequency connector according to claim 1, characterized in that, The high-frequency transmission line structure is selected from microstrip line structure or stripline structure.

3. The high-frequency connector according to claim 1, characterized in that, The high-frequency connector includes a plurality of the signal inserts (20); The plurality of said signal inserts (20) include at least two different high-frequency transmission line structures.

4. The high-frequency connector according to claim 3, characterized in that, At least two signal inserts (20) with different high-frequency transmission line structures are configured to adapt to different signal impedances, respectively.

5. The high-frequency connector according to claim 1, characterized in that, The signal insert (20) also includes solder pads (23) for surface mounting to an external PCB.

6. The high-frequency connector according to claim 1, characterized in that, The base (10) includes multiple base units (11) and connectors (12); each base unit (11) is used to accommodate at least one of the signal plugs (20); two connectors (12) are arranged vertically, and each connector (12) has a conductive part (13).

7. The high-frequency connector according to claim 6, characterized in that, The signal insert (20) is provided with two conductive terminals (24) arranged vertically. The conductive terminals (24) are electrically connected to the conductive layer (22). When the signal insert (20) is inserted into the base unit (11), the conductive terminals (24) contact the conductive part (13).

8. The high-frequency connector according to claim 7, characterized in that, The conductive part (13) is formed by stacking multiple conductive units (131), each conductive unit (131) being a groove, and a conductive sheet (132) is disposed in the groove.

9. The high-frequency connector according to claim 1 or 6, characterized in that, The base (10) also includes a grounding plug or shielding layer for shielding.

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