WO2022134724A1

WO2022134724A1 - Network port provided on pcb and server

Info

Publication number: WO2022134724A1
Application number: PCT/CN2021/121883
Authority: WO
Inventors: 田立良
Original assignee: 苏州浪潮智能科技有限公司
Priority date: 2020-12-26
Filing date: 2021-09-29
Publication date: 2022-06-30
Also published as: CN112769003A

Abstract

A network port (500) provided on a PCB (1) and a server (501). The network port (500) comprises: an RJ45 port (2) provided on a PCB (1), grooves being provided on the RJ45 port (2); and a shielding cover (3) comprising a first shielding body (31) and a second shielding body (32) which are provided opposite to each other, the first shielding body (31) and the second shielding body (32) each comprising a folded edge (311, 321) and elastic tabs (312, 322). The RJ45 port (2) is located between the first shielding body (31) and the second shielding body (32); the folded edges (311, 321) are in lap joint with a bare copper foil on the PCB (1); and the elastic tabs (312, 322) match the grooves so that the RJ45 port (2) and the first shielding body (31) and second shielding body (32) are fixed to each other. By providing the folded edges (311, 321) on the shielding cover (3) and attaching same to a bare copper area of the PCB (1), the shielding cover (3) is in lap joint with the PCB (1), and by means of the elastic tabs (312, 322), the shielding cover (3) can be in lap joint with the housing of the RJ45 port (2), so as to ensure that the shielding cover (3) is in low-impedance lap joint with the housing, thereby ensuring the radiation transmission performance and enhancing the electromagnetic compatibility of the network port.

Description

A network port and a server arranged on a PCB board

This application claims the priority of the Chinese patent application filed on December 26, 2020 with the application number 202011568750.0 and the invention titled "A network port and server provided on a PCB board", the entire contents of which are by reference Incorporated in this application.

technical field

The present application relates to the field of network ports, in particular to a network port and a server arranged on a PCB board.

Background technique

Electromagnetic harassment is a serious and growing form of environmental pollution, ranging from annoying crackling sounds during broadcast reception to life-threatening accidents caused by disturbed control systems.

Radiation harassment is the most important form of interference in electromagnetic harassment. It directly radiates electromagnetic energy in the form of electromagnetic waves, thereby causing damage and interference to the human body and other equipment. Among them, the electromagnetic radiation of the network port is a recognized problem in the industry. Especially under the gigabit network, connecting the server in the shielded room and the computer in the control room through the network cable will produce very strong radiation disturbance.

Therefore, a solution that can reduce the radiation of the network port is urgently needed.

SUMMARY OF THE INVENTION

In view of this, in order to overcome at least one aspect of the above problems, an embodiment of the present application proposes a network port disposed on a PCB board, including:

an RJ45 port arranged on the PCB board, the RJ45 port is provided with a groove;

a shielding cover, the shielding cover includes a first shielding body and a second shielding body arranged oppositely, and the first shielding body and the second shielding body both include folding edges and elastic pieces;

Wherein, the RJ45 port is located between the first shield body and the second shield body; the folded edge is overlapped with the exposed copper foil on the PCB board; the elastic sheet is matched with the groove so that the RJ45 port, the first shield body and the second shield body are fixed to each other.

In some embodiments, it also includes:

a PHY chip, the PHY chip is located on the PCB;

Wherein, the PHY chip and the RJ45 port are connected through multiple pairs of differential signal lines.

In some embodiments, the distance between each pair of the differential signal lines is within a first predetermined interval; the distance between the differential signal lines of different pairs is within a second predetermined interval.

In some embodiments, the corners of the differential signal lines are greater than a predetermined degree and the number of transition layers on the PCB board is less than a predetermined number of layers.

In some embodiments, the horizontal distance between the PHY chip and the RJ45 port is within a third preset interval.

In some embodiments, the distance from the PHY chip to the edge of the PCB is within a fourth preset interval.

In some embodiments, each of the differential signal lines is connected in parallel with a capacitor near the RJ45 port.

In some embodiments, the first shield body and the second shield body both include screw flanges, and the PCB board is provided with screw holes;

Wherein, the screw folded edge coincides with the screw hole.

In some embodiments, the shielding case further includes a connector connecting the first shield body and the second shield body.

Based on the same application concept, according to another aspect of the present application, an embodiment of the present application further provides a server, where the server includes the network port described in any one of the above embodiments.

The present application has one of the following beneficial technical effects: in the solution proposed by the present application, the shielding case can be provided with a folded edge and attached to the exposed copper area of the PCB, so that the shielding case and the PCB can be perfectly overlapped, thereby ensuring the shielding case and the PCB. Make a low impedance bond. And through the shrapnel, the shield and the shell of the RJ45 port can be perfectly overlapped, ensuring that the shield and the shell are overlapped with low impedance, so as to ensure its radiation emission performance, thereby enhancing the electromagnetic compatibility performance of the network port.

Description of drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, other embodiments can also be obtained according to these drawings without creative efforts.

Figure 1 is a schematic diagram of the RJ45 port on the PCB that is located in the middle of the shielding cover but has not been fully overlapped;

FIG. 2 is a schematic structural diagram of a shielding case provided by an embodiment of the present application;

3 is a side view of a first shield body and a folded edge overlapping with a PCB according to an embodiment of the present application;

FIG. 4 is a schematic diagram of a connection between an RJ45 port and a PHY chip according to an embodiment of the present application;

FIG. 5 is another schematic diagram of connection between an RJ45 port and a PHY chip provided by an embodiment of the present application;

FIG. 6 is a schematic diagram of a body of a server provided by an embodiment of the present application.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present application clearer, the following describes the embodiments of the present application in detail with reference to the accompanying drawings and specific embodiments.

It should be noted that all expressions using "first" and "second" in the embodiments of the present application are for the purpose of distinguishing two entities with the same name but not the same or non-identical parameters. It can be seen that "first" and "second" It is only for the convenience of expression and should not be construed as a limitation on the embodiments of the present application, and subsequent embodiments will not describe them one by one.

According to an aspect of the present application, an embodiment of the present application proposes a network port arranged on a PCB, as shown in Figure 1, which may include:

The RJ45 port 2 arranged on the PCB1 board is provided with a groove;

The shielding cover 3, the shielding cover 3 includes a first shielding body 31 and a second shielding body 32 arranged opposite to each other, and the first shielding body 31 and the second shielding body 32 both include folding edges 311 (321) and elastic pieces 312(322);

Wherein, the RJ45 port 2 is located between the first shielding body 31 and the second shielding body 32 ; the folded edge 311 ( 321 ) is configured so that when the RJ45 port 2 is located in the first shielding body 31 When connecting with the second shielding body 32, it is overlapped with the exposed copper foil on the PCB1 board; the elastic piece 312 (322) is configured to be located when the RJ45 port 2 is located between the first shielding body 31 and the The second shielding body 32 is matched with the groove so that the RJ45 port 2, the first shielding body 31 and the second shielding body 32 are fixed to each other.

In the solution proposed in the present application, the folded edges 311 ( 321 ) can be arranged on the shielding cover 3 and attached to the exposed copper area of the PCB1, so that the shielding cover 3 and the PCB1 can be perfectly overlapped, thereby ensuring that the shielding cover 3 and the PCB1 have low impedance. lap. And through the shrapnel 312 (322), the shielding cover 3 and the shell of the RJ45 port 2 can be perfectly overlapped, ensuring that the shielding cover 3 and the shell are connected with low impedance, thereby ensuring its radiation emission performance, thereby enhancing the electromagnetic compatibility performance of the network port. .

In some embodiments, the conventional design of the PCB1 is to spray green oil on the surface of the PCB1 (in the PCB1 stack, it is a solidmask layer, and the solidmask layer is a green oil layer). The folded edges 311 (321) on the two shielding bodies 32 can be overlapped with the exposed copper foil on the PCB1, and a pre-set area on the PCB1 can be set as an oil-injection-free design, and the copper foil in this area is exposed to control the shield 3 The distance between the board and the PCB1 board is convenient for low-impedance overlap with the shield 3 above.

In some embodiments, as shown in FIG. 2 and FIG. 3 , a folded edge 311 (321) is arranged on the shielding cover 3 of the network port. The size of the folded edge 311 (321) and the part of the circuit board not sprayed with green oil are Consistent, so as to ensure that the green oil portion of the folded edge 311 (321) is completely overlapped. A shrapnel 312 (322) is arranged on the overlapping part of the shielding cover 3 and the network port, and the elastic piece 312 (322) is just overlapped on the metal shell of the network port to ensure the low impedance overlap between the shielding cover 3 and the metal shell of the network port. . The bending of the shielding sheet and the injection-free part on the board are completely overlapped to ensure that the shielding cover 3 of the network port and the injection-free part of the main board are overlapped with low impedance.

In some embodiments, it also includes:

PHY chip, the PHY chip is located on the PCB1 board;

Wherein, the PHY chip and the RJ45 port 2 are connected through multiple pairs of differential signal lines.

Specifically, as shown in Figure 4, the PHY chip and the RJ45 port 2 can be connected by the following differential signal pairs: GMAC_MD0_P and GMAC_MD0_N, GMAC_MD1_P and GMAC_MD1_N, GMAC_MD2_P and GMAC_MD2_N, GMAC_MD3_P and GMAC_MD3_N.

Specifically, the distance between each pair of differential signal lines can be set to 10 to 15mil, that is, the distance between GMAC_MD0_P and GMAC_MD0_N can be 10 to 15mil, the distance between GMAC_MD1_P and GMAC_MD1_N can be 10 to 15mil, GMAC_MD2_P and The distance between GMAC_MD2_N may be 10 to 15 mil, and the distance between GMAC_MD3_P and GMAC_MD3_N may be 10 to 15 mil. The distance between the differential signal lines of different pairs may not be less than seven times the thickness of the dielectric, that is, the value of the distance C in FIG. Good high frequency electromagnetic radiation effect.

In some embodiments, the corners of the differential signal lines are greater than a predetermined degree and the number of transition layers on the PCB 1 is less than a predetermined number of layers.

Specifically, as shown in FIG. 4 and FIG. 5 , the corners of the differential signal lines need to be greater than a preset degree, for example, greater than 45°, and when the differential signal lines are routed on the PCB1, the difference exceeds the preset number of layers, such as different more than 2 floors.

In some embodiments, the horizontal distance between the PHY chip and the RJ45 port 2 is within a third preset interval.

In some embodiments, the distance from the PHY chip to the edge of the PCB1 board is within a fourth preset interval.

Specifically, as shown in FIG. 5 , the horizontal distance B between the PHY chip and the RJ45 port 2 needs to be within a third preset interval, for example, between 1 inch and 4 inches. The distance A from the PHY chip to the edge of the PCB1 board is within the fourth preset interval, for example, greater than 1 inch.

In some embodiments, each of the differential signal lines is connected in parallel with a capacitor near the RJ45 port 2 .

Specifically, as shown in FIG. 4 , in order to prevent the energy generated by the PHY chip from being transmitted back to the RJ45 port 2, a capacitor can be connected in parallel on the differential signal line at a position close to the RJ45 port 2. Since the size of the energy on the signal line can be adjusted by adjusting the capacitor connected in parallel to the signal line, but if the capacitor is too large, the signal will be easily attenuated, so the size of the capacitor can be 5pf to 33pf.

In this way, place 5pf to 33pf capacitors close to RJ45 port 2, and adjust the signal strength of the network port control signals GMAC_MD0_P, GMAC_MD0_N, GMAC_MD1_P, GMAC_MD1_N, GMAC_MD2_P, GMAC_MD2_N, GMAC_MD3_P and GMAC_MD3_N through the capacitors, so that the radiation emission level of the network port reaches B level requirements.

In some embodiments, the first shielding body 31 and the second shielding body 32 both include screw flanges 313 (323), and the PCB1 is provided with screw holes 11;

Wherein, the screw flange 313 ( 323 ) coincides with the screw hole 11 .

Specifically, as shown in FIG. 1 , a screw edge 313 (323) can be provided on the first shield body 31 and the second shield body 32 respectively, and a screw hole 11 can be set on the board, and the screw edge 313 (323) and the screw holes 11 on the board can just coincide, increasing the contact between the shield 3 and the board.

In some embodiments, the shielding case 3 further includes a connecting member 33 , and the connecting member 33 connects the first shielding body 31 and the second shielding body 32 .

Specifically, as shown in FIG. 1 , the first shielding body 31 and the second shielding body 32 may be connected as a whole through a connecting member 33 .

In the solution proposed in the present application, a folded edge can be arranged on the shielding cover and attached to the exposed copper area of the PCB, so that the shielding cover and the PCB are perfectly overlapped, thereby ensuring that the shielding cover and the PCB are overlapped with low impedance. And through the shrapnel, the shield and the shell of the RJ45 port can be perfectly overlapped, ensuring that the shield and the shell are overlapped with low impedance, so as to ensure its radiation emission performance, thereby enhancing the electromagnetic compatibility performance of the network port.

Based on the same application concept, according to another aspect of the present application, an embodiment of the present application further provides a server 500, as shown in FIG. mouth 501.

The above are exemplary embodiments disclosed in the present application, but it should be noted that various changes and modifications may be made without departing from the scope of the disclosure of the embodiments of the present application defined by the claims. The functions, steps and/or actions of the method claims in accordance with the disclosed embodiments described herein need not be performed in any particular order. Furthermore, although elements disclosed in the embodiments of the present application may be described or claimed in an individual form, unless explicitly limited to the singular, they may also be construed as a plurality.

It should be understood that, as used herein, the singular form "a" is intended to include the plural form as well, unless the context clearly supports an exception. It will also be understood that "and/or" as used herein is meant to include any and all possible combinations of one or more of the associated listed items.

The above-mentioned embodiments of the present application disclose the serial numbers of the embodiments only for description, and do not represent the advantages and disadvantages of the embodiments.

Those of ordinary skill in the art should understand that: the discussion of any of the above embodiments is only exemplary, and is not intended to imply that the scope (including the claims) disclosed by the embodiments of the present application is limited to these examples; under the idea of the embodiments of the present application , the technical features in the above embodiments or different embodiments can also be combined, and there are many other changes in different aspects of the above embodiments of the present application, which are not provided in detail for the sake of brevity. Therefore, any omission, modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present application should be included within the protection scope of the embodiments of the present application.

Claims

A network port arranged on a PCB, comprising:

an RJ45 port arranged on the PCB board, the RJ45 port is provided with a groove;

a shielding cover, the shielding cover includes a first shielding body and a second shielding body arranged oppositely, and both the first shielding body and the second shielding body include a folded edge and an elastic sheet;

Wherein, the RJ45 port is located between the first shield body and the second shield body; the folded edge is overlapped with the exposed copper foil on the PCB board; the elastic sheet is matched with the groove so that the RJ45 port, the first shield body and the second shield body are fixed to each other.
The network port of claim 1, further comprising:

a PHY chip, the PHY chip is located on the PCB;

Wherein, the PHY chip and the RJ45 port are connected through multiple pairs of differential signal lines.
The network port of claim 2, wherein the distance between each pair of the differential signal lines is within a first preset interval; the distance between the differential signal lines of different pairs is within within the second preset interval.
The network port of claim 2, wherein the corners of the differential signal lines are larger than a preset degree and the transition layers on the PCB board are smaller than the preset number of layers.
The network port of claim 2, wherein a horizontal distance between the PHY chip and the RJ45 port is within a third preset interval.
The network port of claim 2, wherein the distance from the PHY chip to the edge of the PCB board is within a fourth preset interval.
The network port of claim 2, wherein each of the differential signal lines is connected in parallel with a capacitor at a position close to the RJ45 port.
The network port according to claim 1, wherein the first shielding body and the second shielding body both comprise screw flanges, and the PCB board is provided with screw holes;

Wherein, the screw folded edge coincides with the screw hole.
The network port of claim 1, wherein the shielding cover further comprises a connecting piece, and the connecting piece connects the first shielding body and the second shielding body.
A server, characterized in that, the server comprises the network port according to any one of claims 1 to 9.