CN113451810A

CN113451810A - Backplane connector base with improved differential impedance and insertion loss

Info

Publication number: CN113451810A
Application number: CN202010866872.1A
Authority: CN
Inventors: 蔡社民; 刘世庆; 李伟; 游静元; 何斌; 李运明
Original assignee: Sichuan Yonggui Science and Technology Co Ltd
Current assignee: Sichuan Yonggui Science and Technology Co Ltd
Priority date: 2020-08-26
Filing date: 2020-08-26
Publication date: 2021-09-28

Abstract

The invention discloses a backplane connector base for improving differential impedance and insertion loss, which is characterized by comprising: the base is provided with a plurality of differential pair combination units which are distributed in an array manner, positioning grooves are respectively arranged on the inner side surfaces of the two side wings, and air holes are formed in the differential pair combination units; due to the adoption of the air region structure, the air has low dielectric constant and dissipation coefficient, so that the connectors on the connector base have smaller electromagnetic coupling, the differential impedance between differential lines is reduced, and the insertion loss is reduced.

Description

Backplane connector base with improved differential impedance and insertion loss

Technical Field

The invention belongs to the technical field of electric connectors, and particularly relates to a backplane connector base for improving differential impedance and insertion loss in a high-density high-speed digital communication connector.

Background

Under the vigorous development of the 5G (fifth generation mobile communication technology), IOT (internet of things), big data, cloud, intelligent driving, intelligent medical treatment, intelligent families and the like, the requirements on the data transmission rate for various high-speed digital communication systems and equipment are higher and higher. The high-speed digital communication backplane connector is an important basic component of a high-speed communication system and equipment. The signal integrity performance of the connector seriously affects the performance of high-speed digital communication systems and equipment. At present, a single-channel backplane connector with 5Gbp transmission rate cannot meet the requirement of high-speed digital communication systems and equipment on high-speed data transmission rate. But rather, backplane connectors are required to achieve single channel transmission rates of 10Gbps, 28 Gbps, and thus 56Gbps, 122Gbps, and even higher.

However, most backplane connectors in China currently have single-channel high-speed data transmission rates of below 28 Gpbs. Therefore, it is very important and necessary to research the backplane connector and its structure to improve the high speed data transmission rate of the backplane connector. The existing backplane connector is analyzed and researched, and a backplane connector base with improved differential impedance and insertion loss is improved and optimized by utilizing the physical characteristics of low dielectric constant and dissipation coefficient of air, so that the differential impedance and insertion loss of the high-speed backplane connector are improved, and the single-channel transmission rate of the high-speed data communication backplane connector is further improved.

Disclosure of Invention

The invention aims to improve the transmission rate of a high-speed data communication backplane connector, and adopts a backplane connector base with improved differential impedance and insertion loss.

In order to achieve the purpose, the invention adopts the following technical scheme:

a backplane connector header for improving differential impedance and insertion loss, comprising: the base is provided with a plurality of differential pair combination units which are distributed in an array mode, positioning grooves are formed in the inner side faces of the two side wings respectively, and air holes are formed in the differential pair combination units.

In the above technical solution, the differential pair combination unit includes a U-shaped first hole for connecting the circuit terminal, and a second hole for connecting the differential line group, and the air hole is disposed between the first hole and the second hole.

In the above technical solution, the second hole is disposed in the U-shaped surface of the first hole, and the air hole is disposed at the bottom of the U-shaped surface.

In the above technical solution, the air hole is communicated with the first hole.

In the technical scheme, the air hole structure comprises two axially symmetrically distributed second holes and air holes, wherein one second hole corresponds to one air hole.

In the invention, in order to realize the purpose of improving the differential impedance and the insertion loss, a vacant third hole is arranged between the bottom edge of the first hole and the second hole; the third bore is in communication with the first bore; by using the material characteristic that air has low dielectric constant and small dissipation coefficient, no connector is inserted into the third hole, so that the third hole becomes an air area. Because of the low dielectric constant and dissipation factor of the air regions, coupling between the signal metal conductor differential pair path and the signal U-shaped metal return path is reduced, thereby improving differential impedance and, at the same time, insertion loss.

In the invention, in order to realize the purpose of smooth matching of the connectors, a plurality of positioning grooves are respectively arranged on the inner side surfaces of the two side wings, the two side wings are symmetrically connected to two symmetrical side edges of the base, and the positioning groove on one side wing and the positioning groove on the other side wing are arranged in error.

In the invention, the purposes of high density, high speed and data transmission are realized, the differential pair combination units are distributed on the base in an array manner, and the position distribution of odd columns and the position distribution of even columns of the differential pair combination unit columns are staggered mutually.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

due to the adoption of the air region structure, the air has low dielectric constant and dissipation coefficient, so that the connectors on the connector base have smaller electromagnetic coupling, the differential impedance between differential lines is reduced, and the insertion loss is reduced.

Drawings

The invention will now be described, by way of example, with reference to the accompanying drawings, in which:

fig. 1 and 2 are schematic views of a base;

FIG. 3 is a schematic view;

FIG. 4 is a schematic diagram of an array of differential pair combining units;

FIG. 5 is a schematic diagram of a differential pair combining unit with signal terminals and U-shaped loop terminals mounted thereon;

wherein: 1 is a base, 11 is a base, 12 is a differential pair combination unit, 13, 14 are side wings, 121, 122 are differential pair holes, 123 are U-shaped holes, 1231, 1232 are air holes, 131, 132, 141, 142 are positioning grooves, 2 are signal terminals, 3 are U-shaped loop terminals, and 12a, 12b are differential pair combination unit array groups.

Detailed Description

All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.

Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.

Example one

As shown in fig. 1 and 2, this embodiment is a U-shaped insulator comprising a base 11 having an array of differential pair combining units 12, a wing 13 having a guide orientation, and another wing 14 having a guide orientation. The two side wings are used for guiding and positioning in the non-insertion direction when the connectors are plugged. In this embodiment, the

side flaps

13, 14 are fixedly connected to the chassis 11 as a unitary structure.

As shown in fig. 3, the differential pair combination unit 12 in this embodiment includes: a first hole for connection with the U-shaped loop terminal 3, the first hole being a U-shaped hole 123; a second hole for connecting a differential signal connector, the second hole being two

differential pair holes

121, 122; and a third hole for vacant is arranged between the bottom edge of the first hole and the second hole, the third hole is an

air hole

1231, 1232, and the third hole is communicated with the first hole.

In this embodiment, two

differential pair holes

121, 122 are symmetrically distributed on the U-shaped surface in the U-shaped hole, and one differential hole corresponds to one air hole. All structures in the whole differential pair combination unit 12 are distributed with central axis symmetry.

As shown in fig. 4, in the present embodiment, a plurality of differential pair combination units 12 are distributed in an array on the base 11, and the differential pair combination units 12 are positionally misaligned with respect to each other, for example, the differential pair combination unit array group 12a in the odd-numbered column and the differential pair combination unit array group 12b in the even-numbered column are misaligned.

In this embodiment, as shown in fig. 1 and fig. 2, a plurality of

positioning grooves

131, 132, 141, 142 are disposed on the inner side surfaces of the two symmetrical side wings, and the positioning grooves on the two side wings are staggered from each other, so that the base has guiding and positioning functions when being inserted into the connector.

As shown in fig. 5, which is an illustration of the interface between the present embodiment and the connector, when the differential signal terminal 2 is connected to the

second holes

121 and 122, and the U-shaped loop terminal 3 is connected to the first hole 123, because no connection is made in the

third holes

1231 and 1232, an air wall is formed between the differential signal terminal 2 and the U-shaped loop terminal 3, so that the coupling between the signal ends is reduced, the differential impedance is improved, and the insertion loss is reduced.

The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.

Claims

1. A backplane connector header for improving differential impedance and insertion loss, comprising: the base and set up in base both sides and the flank of being connected with the base, be provided with a plurality of difference pair combination units that are array distribution on the base, be provided with the constant head tank on the medial surface of two flanks respectively, be provided with the air hole in the difference pair combination unit.

2. The backplane connector base of claim 1, wherein the differential pair combining unit comprises a first U-shaped hole for connecting the loop terminals and a second hole for connecting the differential pair groups, the air hole being disposed between the first hole and the second hole.

3. The backplane connector header according to claim 2, wherein the second hole is disposed within a U-shaped face of the first hole, and the air hole is disposed at a bottom of the U-shaped face.

4. The backplane connector header for improving differential impedance and insertion loss of claim 2, wherein the air hole communicates with the first hole.

5. A backplane connector header according to any of claims 2-4, comprising two axially symmetrically disposed second holes and air holes, one second hole for each air hole.

6. The backplane connector base of claim 1, wherein the differential pair assemblies are arranged in an array on the base, and the odd columns of the differential pair assemblies are offset from the even columns.

7. The backplane connector base according to claim 1, wherein the two symmetrical side edges of the base are provided with side wings connected to the base, and the opposite surfaces of the two side wings are respectively provided with a plurality of positioning slots.

8. The backplane connector base of claim 7, wherein the detents on one of the wings are offset from the detents on the other wing.