Patent Application
20160036165
Embodiments of the present disclosure generally relate to electrical connector assemblies.
Various communication or computing systems use electrical connectors to transmit data signals between different components of the systems. An electrical connector may mechanically and electrically connect to a printed circuit board, for example. Often, differential pair signaling is used with respect to electrical systems. Typically, a differential pair includes a positive signal component and a negative signal component. Known connector assemblies may locate differential pairs in close proximity to one another. In doing so, however, the high speed signals transmitted by one differential pair may cross-talk or otherwise interfere with signals received by an adjacent differential pair, thereby degrading the performance of the connector assemblies and/or the systems in which the connector assemblies are used.
Known connector assemblies may be susceptible to cross-talk and interference between differential pairs at or near contact interfaces on a printed circuit board. High speed signals passing between a printed circuit board and a connector assembly may cross-talk or otherwise interfere with one another, which may degrade performance.
In general, as data rates continue to increase, there is a need to control electrical noise through electrical connector assemblies in order to achieve desired performance.
Certain embodiments of the present disclosure provide an electrical connector assembly that may include a plurality of high speed signal boards and a plurality of signal isolating barriers. Each of the high speed signal boards may include or otherwise carry or supports a plurality of board contacts, which may be configured to connect to a printed circuit board. Each of the signal isolating barriers may be positioned around a group of the board contacts. Each of the signal isolating barriers isolates the group of the board contacts from other groups of the board contacts. In at least one embodiment, each of the signal isolating barriers forms a box structure around the group of the board contacts. In at least one embodiment, the plurality of high speed signal boards may offset a subset of the plurality of board contacts from another subset of the plurality of board contacts.
Each of the plurality of isolating barriers may include parallel first portions of ground plates and second portions of ground isolator panels that connect to the parallel portions of ground plates. At least portions of the second portions may be perpendicular to the first portions. Each of the ground isolator panels may include a linear segment connected to an offset segment by an offsetting segment. Each of the second portions may include a contacting portion extending outwardly therefrom. In at least one embodiment, the contacting portion may include an eye-of-the-needle opening that resides within a plane that is perpendicularly oriented with respect to one or more planes in which the plurality of board contacts reside.
The group of the board contacts may include a differential pair of the board contacts. The other groups of the board contacts may include other differential pairs of the board contacts.
Certain embodiments of the present disclosure provide an electrical connector assembly that may include a plurality of signal isolating barriers. Each of the plurality of signal isolating barriers may be positioned around a group of board contacts proximate to a board connecting interface. Each of the plurality of signal isolating barriers isolates the group of the plurality of board contacts from other groups of the plurality of board contacts.
Certain embodiments of the present disclosure provide an electrical connector assembly that may include a main housing, a plurality of high speed signal boards retained by the main housing, and a plurality of signal isolating barriers retained by the main housing. Each of the plurality of high speed signal boards may include a plurality of board contacts. The plurality of high speed signal boards offset a subset of the plurality of board contacts from another subset of the plurality of board contacts. Each of the plurality of signal isolating barriers provides a box structure positioned around a differential pair of the plurality of board contacts. Each of the plurality of signal isolating barriers isolates the differential pair of the plurality of board contacts from other differential pairs of the plurality of board contacts. Each of the plurality of isolating barriers may include parallel first portions of ground plates and second portions of ground isolator panels that connect to the parallel portions of ground plates. Each of the ground isolator panels may include a linear segment connected to an offset segment by an offsetting segment and an eye-of-the-needle contacting portion extending from at least one of the linear segment, the offset segment, and the offsetting segment.
Embodiments of the present disclosure provide electrical connector assemblies that eliminate, minimize, or otherwise reduce cross-talk, interference, and the like between electrical contacts, which may be proximally located near one another. In at least one embodiment, one or more grounding members form a shielding or isolating barrier around one or more board contacts, thereby isolating them from neighboring board contacts, which may be or include terminal ends of an electrical signal path within an electrical connector assembly. In at least one other embodiment, the board contacts may be offset, shifted, or otherwise staggered with respect to one another to increase the distance therebetween in order to reduce cross-talk, interference, or the like.
The board contacts 112 may be or include contacts that are configured to connect to a host board, such as a printed circuit board. The board contacts 112 may be terminal ends of signal contacts or paths that extend through signal boards within the electrical connector assembly 100. For example, the board contacts 112 may be configured to pass into, onto, or through a board connection interface between the connector assembly 100 and a printed circuit board (not shown) to which the connector assembly 100 may be mounted on or otherwise connected. For example, the board connection interface may be or include a bottom surface of the electrical connector assembly 100 that is configured to abut into a printed circuit board.
Alignment posts 114 may downwardly extend from lower edges of the lateral walls 106, the front wall 104, and/or the rear wall 110. The alignment posts 114 may be configured to be retained within reciprocal cavities formed in a printed circuit board to align and locate the connector assembly 100 with respect to the printed circuit board. As such, the board contacts 112 are configured to be aligned with and retained within reciprocal openings, such as plated through-holes or vias, of the printed circuit board.
As shown, two receptacle shrouds 116 may extend outwardly from the front wall 104. Alternatively, the electrical connector assembly 100 may include more or less receptacle shrouds 116 than shown. Each receptacle shroud 116 defines an internal chamber 118 that retains a plurality of mating contacts 120 that are configured to electrically mate with mating contacts of a reciprocal electrical connector assembly, such as a plug-style electrical connector assembly. Optionally, the electrical connector assembly 100 may be a plug-style electrical connector assembly.
The mating contacts 120 extend from or are otherwise supported by or connected to signal boards, such as wafers, cards, or the like, retained within the electrical connector assembly 100. The signal boards may include traces, contacts, and/or other signal paths that connect a mating contact 120 to a respective board contact 112.
The board contacts 112 may connect or otherwise terminate to a printed circuit board (not shown). The board contacts 112 connect to signal traces, paths, or the like that extend through boards, such as high speed signal boards, retained within the electrical connector assembly 100.
Each signal board 122 may abut a signal board 124. A ground plate 128 is positioned on one side of a high speed signal board 122, while another ground plate is positioned on an opposite side of a high speed signal board 124. Thus, a board pair 130 may be sandwiched between opposed ground plates 128. As shown in
As shown, the high speed board pairs 130 may be located towards lateral walls 106 of the main housing 102 (shown in
As shown in
The ground plates 128 may extend along sides of the high speed signal boards 122 and 124. As shown, a set of high speed signal boards 122 and 124 may be sandwiched between two ground plates 128. Each ground plate 128 may include grounding contacts 121 interleaved between the mating contacts 120. As such, the high speed signal boards 122 and 124 may be shielded entirely from mating ends to mounting ends.
The board contact 236 may be retained by the electrical connector assembly 100 (shown in
The contacting portion 242 may, in turn, be integrally connected to a receptacle-retaining block 248 having a width w greater than the width b of the beam 240. The block 248 may be configured to be securely retained within a channel formed within a high speed signal board 122 or 124 (shown in
In a differential pair, one of the board contacts 236 may be a flat planar structure, while the other of the board contacts 236 may include the curved intermediate section 253. In this manner, the contacting portions 242 of the board contacts of the differential pair may reside within a common plane.
The blade 250 of each board contact 236 retained within the high speed signal board 122 or 124 of the electrical connector assembly 100 may electrically connect to a mating contact 120 (shown in
As shown, each ground isolator segment 170 of a ground isolator panel 150 may include a contacting portion 172 (such as an eye-of-the-needle contacting portion) that extends downwardly therefrom. The contacting portion 172 may be a compliant pin having deflectable legs that reside in a plane 171. The plane 171 may span linearly between lateral walls 106 of the main housing 102. The plane 171 may be perpendicular to the lateral walls 106. As shown, the contacting portions 173 of the board contacts 112 may reside within planes that are perpendicular to the plane 171. The contacting portion 172 may be perpendicular to aligned contacting portions 173 of the board contacts 112 of a differential pair. For example, while the contacting portions 173 of the board contacts 112 are parallel with the ground plates 128, the contacting portions 172 are perpendicular to the ground plates 128. In this manner, the perpendicular contacting portions 172 may provide increased surface area for shielding the board contacts 112 from one another. In at least one other embodiment, the contacting portions 172 may also be parallel with the ground plates 128, and may therefore be aligned in a parallel fashion with the contacting portions of the board contacts 112. Alternatively, the ground isolator segments 170 may not include board contacts.
Each ground isolator panel 150 may be or include a metal ground plate, sheet, wall, or the like that extends from the bottom face 165 to an intermediate area within the electrical connector assembly 100. For example, the ground isolator panel 150 may be the same or similar length or height as that of a board contact 112 (or 236). Alternatively, each ground isolator panel 150 may extend a greater or lesser distance from the bottom face 165 to an intermediate area within the electrical connector assembly 100. For example, each ground isolator panel 150 may be as tall as each ground plate 128.
As shown, each ground plate 128 includes a plurality of slots 190, each of which is configured to retain a reciprocal tab 192 of a ground isolator plate 150. For example, the tabs 192 may nest within the slots 190. The tabs 192 of the ground isolator plates 150 may be securely retained within the slots 190 of the ground plates 128, such as through an interference fit. As such, the ground isolator plates 150 securely connect to the ground plates 128 to form the matrix or pattern of signal isolating barriers 152.
The ground isolator plates 150 may extend across the electrical connector assembly 100 only through the high speed signal boards 122 and 124. The ground isolator panels 150 may not extend through the low speed boards 140. Alternatively, the ground isolator panels 150 may extend across an entire width of the electrical connector assembly 100 from one lateral wall 106 to an opposite lateral wall 106.
A differential pair is a pair of conductors used for differential signaling. In general, differential pairs reduce crosstalk and electromagnetic interference. Additionally, differential pairs are well-suited for high speed data transmission. One board contact 112 of a differential pair 200a or 200b may be a positive signal contact, while the other board contact 112 of the differential pair 200a or 200b may be a negative signal contact, or vice versa.
Each ground isolating panel 150 may include a linear segment 210 that connects to an offset segment 212 by an offsetting segment 214, such as a curved or linear wall that may generally be perpendicular to the linear segment 210 and the offset segment 212. The ground isolating panels 150 may include offset segments 212 in order to accommodate the offset nature of the differential pairs 200a and 200b.
Accordingly, each differential pair 200a and 200b may be shielded from another differential pair by a signal isolating barrier 152a and 152b, which may include vertical wall segments of ground plates 128 and crosswise portions of ground isolating panels 150. Each signal isolating barrier 152a and 152b may include one differential pair 200a and 200b, respectively. The signal isolating barrier 152a may be rectangular in shape, while the signal isolating barrier 152b may be defined by a shape dictated, in part, by the offset segments 212.
The signal isolating barriers 152a and 152b surround the differential pairs 200a and 200b, respectively. For example, the signal isolating barrier 152a is positioned around the differential pair 200a, thereby isolating the differential pair 200a from other differential pairs. The signal isolating barrier 152a may surround or shield the differential pair 200a on all sides in the plane of the X and Y axes. Additionally, the plane of the board contacts 172 of the ground isolator panels 150 may be perpendicular to the plane of the board contacts 112. As such, the board contacts 172 provide a shielding surface of increased area.
Each signal isolating barrier 152 may provide a protective, shielding, or isolating member, such as a sleeve, chute, box, channel, wall, or the like, that surrounds a board contact or group of board contacts (such as a differential pair). The signal isolating barrier 152 shields or otherwise isolates the board contact or group of board contacts from another board contact or group of board contacts, thereby eliminating, minimizing, or otherwise reducing cross-talk or interference therebetween.
Each signal isolating barrier 152 may be defined by grounding members, such as portions of the ground plates 128 and portions of the ground isolating panels 150, that surround a board contact or a group of board contacts (such as the differential pair 200a) on at least four sides (for example, top, bottom, and lateral portions) at or proximate an interface with a printed circuit board. The ground members may form a full perimeter shielding structure around each of the differential pairs 200a and 200b, for example. The ground isolator panels 150 may be cross-connected with the ground plates 128 to form box-like shielding signal isolating barriers 152.
The board contacts or groups of board contacts (such as the differential pairs 200a and 200b) may be shifted, offset, or staggered with respect to one another, in order to increase the distance therebetween. The increased distance reduces the possibility of cross-talk or interference therebetween.
Alternatively, the differential pairs 200a and 200b may not be offset or shifted with respect to one another. Instead, the differential pairs 200a and 200b may be aligned with respect to one another in relation to the X axis. In this embodiment, the ground isolating panels 150 may not include offset segments, but may instead be linear panels, the entireties of which are parallel with the X axis.
Also, alternatively, the signal isolating barriers 152 may be used with respect to various types of signal contacts, whether or not they are differential pairs. For example, a single signal contact may be isolated within each isolating region.
Embodiments of the present disclosure provide an electrical connector assembly that eliminates, minimizes, or otherwise reduces cross-talk, interference, and the like between signal contacts, particularly at or proximate to an interface of or with a printed circuit board. Ground plates within the electrical connector assembly may cross connect with ground isolating panels, such as ground cross bars, which may include a board contact that is perpendicularly oriented with respect to high speed signal board contacts. Embodiments of the present disclosure may provide a full perimeter shield around a board contact or group of board contacts (such as a differential pair), such as at or proximate to an interface with a printed circuit board. Further, embodiments of the present disclosure may shift, offset, or otherwise stagger adjacent board contacts with respect to one another, thereby further reducing cross-talk, interference, or the like.
While various spatial terms, such as upper, bottom, lower, mid, lateral, horizontal, vertical, and the like may be used to describe embodiments of the present disclosure, it is understood that such terms are merely used with respect to the orientations shown in the drawings. The orientations may be inverted, rotated, or otherwise changed, such that an upper portion is a lower portion, and vice versa, horizontal becomes vertical, and the like.
It is to be understood that the above description is intended to be illustrative, and not restrictive. For example, the above-described embodiments (and/or aspects thereof) may be used in combination with each other. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the disclosure without departing from its scope. Dimensions, types of materials, orientations of the various components, and the number and positions of the various components described herein are intended to define parameters of certain embodiments, and are by no means limiting and are merely exemplary embodiments. Many other embodiments and modifications within the spirit and scope of the claims will be apparent to those of skill in the art upon reviewing the above description. The scope of the disclosure should, therefore, be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. In the appended claims, the terms “including” and “in which” are used as the plain-English equivalents of the respective terms “comprising” and “wherein.” Moreover, in the following claims, the terms “first,” “second,” and “third,” etc. are used merely as labels, and are not intended to impose numerical requirements on their objects. Further, the limitations of the following claims are not written in means—plus-function format and are not intended to be interpreted based on 35 U.S.C. §112(f), unless and until such claim limitations expressly use the phrase “means for” followed by a statement of function void of further structure.
