CN101371409A

CN101371409A - Communications connectors with parasitic and/or inductive coupling elements for reducing crosstalk and related methods

Info

Publication number: CN101371409A
Application number: CNA2007800028490A
Authority: CN
Inventors: T·艾利斯; D·斯卡伯勒
Original assignee: NORTH CAROLINA COMSKOP CO
Current assignee: NORTH CAROLINA COMSKOP CO
Priority date: 2006-01-23
Filing date: 2007-01-05
Publication date: 2009-02-18

Abstract

Communications connectors that include parasitic conductive loops are provided, such as a wire connection system that includes a first pair of wire connection terminals mounted in a mounting substrate, a second pair of wire connection terminals mounted in a mounting substrate and a parasitic conductive loop mounted adjacent at least the first pair of wire connection terminals.

Description

Have passive and/or the inductive couplings parts reduce the communications connectors and the correlation technique of crosstalking

Related application

The name that the application requires on January 23rd, 2006 to submit to is called the U.S. Provisional Patent Application No.60/761 of " having communications connectors and correlation technique that the passive coupling parts reduce to crosstalk ", 088 priority, this with referring to mode introduce its whole disclosure contents.

Technical field

Present invention relates in general to communications connectors, and be particularly related to the method and apparatus of crosstalking that is used for reducing communications connectors.

Background technology

In electrical communication system, more more favourable by a pair of cable (hereinafter claiming " cable in pairs " or " differential pair ") transmit information signals (for example video, audio frequency, data) sometimes than the single cable of using the balance transmission technology.In such system, the information signal of transmission comprises the voltage pressure reduction between the cable and does not consider existing absolute voltage value.In pairs each the bar cable in the cable all is subjected to easily from source light source for example, the influence of the electronic noise of automobile spark plug and radio station.Because such noise all is identical for two cables in the paired cable, so the difference information signal usually can be not disturbed.

But what more be concerned about is electronic noise near cable that can extend certain distance on essentially identical direction or paired cable.This noise is called as crosstalks.In comprising the communication system of Net-connected computer, form passage by level connection connector and cut cable.In such passage, the close degree and the route selection of the contact structures in electric wire (conductor) and the connector can cause capacitive character and inductive couplings, and these couplings can produce near-end cross (NEXT) (just crosstalking of measuring with corresponding input position place, the source of same position) and far-end cross talk (FEXT) (just crosstalking of measuring with corresponding outgoing position place, the source of input position).Crosstalking of inducting on nigh second differential pair of this first differential pair by cable generally includes the interference signal that can disturb by the second differential pair information transmitted signal.As long as identical noise signal is added in each bar cable of paired cable, voltage difference between the cable will keep identical and the differential cross-talk of can not inducting, but simultaneously on two cables with respect to the average voltage on the reference ground common mode crosstalk that can be raised and induct.On the other hand, when equal and opposite in direction but opposite polarity noise signal when being added in each bar cable of paired cable, voltage difference between the cable differential cross-talk that will be raised and induct, thereby but on two cables with respect to the average voltage of the reference bottom surface common mode crosstalk of can not inducting that then can not raise.Term " to the difference of differential cross-talk " refers to the differential noise signal of inducting on the differential signal source paired cable in its vicinity on the paired cable.Term " to the difference of common mode crosstalk " refers to the common mode noise signal of inducting on the differential signal source paired cable in its vicinity on the paired cable.To the uncompensated difference of differential cross-talk and/or the performance that all can reduce communications connectors and use the communication system of this connector to the difference of common mode crosstalk.

Summary of the invention

According to some embodiment of the present invention, the cable connecting system that is provided comprises installation base plate, is installed in the first couple and second pair of wire connection terminals in the installation base plate, and near the parasitic conductive loops of installing first binding post of first pair of wire connection terminals.This cable connecting system can be the cable link block of for example 110 types.

In these cable connecting systems, the first of parasitic conductive loops can be set to receive induced signal from least the first binding post of first pair of wire connection terminals.The second portion of parasitic conductive loops can be provided so that the induced signal that is received produces magnetic field near at least one binding post of second pair of wire connection terminals.This magnetic field can be offset second magnetic field by second binding post generation of first pair of wire connection terminals at least in part.Parasitic conductive loops can be installed between first pair and second pair of wire connection terminals in certain embodiments.Binding post can be an insulation displacement contacts (IDC) for example.In comprising the embodiment of IDC, each IDC can comprise the groove that is used to hold conductor in its relative top and bottom, and the groove of each IDC can be substantially parallel and conllinear not.

In certain embodiments, parasitic conductive loops can be set to receive along first induced signal of first direction wraparound road transmission from first binding post along first pair of wire connection terminals, and receives along second induced signal of first direction wraparound road transmission from second binding post of first pair of wire connection terminals.First pair of wire connection terminals comprises an IDC and the 2nd IDC, and second pair of wire connection terminals comprises the 3rd IDC and the 4th IDC.In these embodiments, the first and the 3rd IDC can be first row's part of IDC and the second and the 4th IDC can be the part of the second row IDC, and parasitic conductive loops can be set to coupling energy from the signal that an IDC to the four IDC transmit.Parasitic conductive loops can further be set to coupling energy from the signal of the 2nd IDC to the three IDC transmission in such embodiments.

In certain embodiments, the first of parasitic conductive loops can set its size according to first binding post of first pair of wire connection terminals, and shape and position are with first crosstalk signal of inducting from the signal of first binding post transmission on parasitic conductive loops.In these embodiments, the second portion of parasitic conductive loops can be set its size according to one of them binding post of second pair of wire connection terminals, shape and position are with second crosstalk signal of inducting from first crosstalk signal on a described binding post of second pair of wire connection terminals.

In certain embodiments, first pair of wire connection terminals can be the part of first link block, and second pair of wire connection terminals is the part of second Wiring module.In other embodiment, first pair and second pair of wire connection terminals can be that binding post adjacent in the same link block is right.

The further embodiment according to the present invention, the reduction that is used for communications connectors that the is provided circuit of crosstalking comprises second conductor of first conductor that transmits first signal and transmission secondary signal.Reduction in these connectors circuit of crosstalking comprises the parasitic conductive loops that is set to receive the electric current of inducting from first magnetic field that first signal produces, and wherein the induced current on the parasitic conductive loops produces the 3rd magnetic field to offset second magnetic field that is produced by secondary signal at least in part.Second magnetic field can be offset at least in part at the near zone of the 3rd conductor of communications connectors in the 3rd magnetic field.

In certain embodiments, first and second signals can be equal and opposite in direction but opposite polarity signal.First and second conductors can be insulation displacement contacts (IDC) for example.In the embodiment of IDC, but an IDC can have and is in the same plane first and second conductor receiving slits of conllinear not.

In certain embodiments, the first of parasitic conductive loops near first conductor and the second portion of parasitic conductive loops near second conductor.In these embodiments, near the part of the part in the 3rd magnetic field the first of parasitic conductive loops with near the 3rd magnetic field the second portion of first direction and parasitic conductive loops has the second direction opposite substantially with first direction.

In certain embodiments, first conductor can be first conductor of the pairs of conductors of modular plug, and second conductor can be second conductor of pairs of conductors.In these embodiments, first and second signals can be equal and opposite in direction but opposite polarity signal.

Other the embodiment according to the present invention, the communications connectors that is provided comprises the passive coupling parts, near second conductor near first conductor the first of passive coupling parts and the second portion of passive coupling parts.In these embodiments, the passive coupling parts are set to the compensate for crosstalk signal that is coupled and inducts to second conductor from first conductor, and wherein the compensate for crosstalk signal of coupling is inducted on second conductor along the opposite direction of the sense that produces with crosstalk signal.The passive coupling parts can comprise a loop, and the first of passive coupling parts can be positioned in the first in this loop and the second portion of passive coupling parts can be positioned at this loop with loop first relative substantially second portion on.

Or further embodiment according to the present invention, the communications connectors that is provided comprises first contact and second contact that is set to receive first differential signal, be set to receive the 3rd contact and the 4th contact of second differential signal, and be arranged on passive coupling parts between first and second contacts and third and fourth contact, wherein the passive coupling parts are set to receive from first contact first induced signal with first polarity and receive second induced signal with first polarity from second contact.

Remain additional embodiments, the method that is used to reduce the differential cross-talk signal of inducting to the 3rd conductor of communications connectors from first pair of conductor comprising first conductor and second conductor is provided according to the present invention.According to these methods, crosstalk signal is inducted from the signal that transfers to parasitic conductive loops first by first conductor offsets by second magnetic field of transmission by the signal generation of second conductor at least in part to produce around first magnetic field of parasitic conductive loops second portion.First and second magnetic fields can cancel each other out near the 3rd conductor at least in part.

Or the further embodiment according to the present invention, third and fourth binding post that the cable link block that is provided comprises first and second binding posts of having determined first row's binding post and determined to be basically parallel to second row's binding post of first row's binding post.The cable link block further comprises the inductive couplings parts that are set to inductive ground coupling energy from the signal that first binding post to the, four binding posts transmit.In certain embodiments, the inductive couplings parts can be parasitic conductive loops.In other embodiment, the inductive couplings parts can be the signal transmission projections on first binding post.

Description of drawings

Fig. 1 is the perspective view according to the passive coupling parts of the embodiment of the invention and first and second interreactions.

Fig. 2 is a kind of decomposition diagram of 110 type data communication systems, wherein can use the communications connectors according to the embodiment of the invention.

Fig. 3 is the decomposition diagram of the link block used in the data communication system shown in Figure 2.

Fig. 4 is the front partial section view of the link block among Fig. 3.

Fig. 5 is the amplification front view of the exemplary IDC of the link block among Fig. 3.

Fig. 6 is the front view of interior IDC of the link block among Fig. 3 and parasitic conductive loops configuration.

Fig. 7 is the perspective view of the interior parasitic conductive loops of using of link block among Fig. 3.

Fig. 8 is four IDC of the link block among Fig. 3 and the perspective view of a parasitic conductive loops configuration.

Fig. 9 is the sectional view along the I-I line among Fig. 8.

Figure 10 is the decomposition diagram according to the modular plug that comprises parasitic conductive loops of the embodiment of the invention.

Embodiment

Hereinafter with reference to the accompanying drawings the present invention is done more specific description.The present invention should not be understood that to be subject to illustrated embodiment, but these embodiment should be understood that it is in order fully and up hill and dale openly to give those of ordinary skills with the present invention.In the accompanying drawings, identical Reference numeral refers to identical parts.For the sake of clarity, the thickness of some parts and size can be exaggerated.

The relative terms in space, for example " following ", " ... under ", " below ", " ... on ", " left side ", " right side " and similar terms, be used to the simplification that illustrates herein, to describe the relation between parts shown in the figure or feature and another parts (or a plurality of parts) or the feature (or a plurality of feature).Should be appreciated that the orientation in describing accompanying drawing, the space relative terms can also be used to summarize the different orientation of use or operating device.For example, if the device among the figure is squeezed, be described to be positioned at " top " that miscellaneous part or the parts of feature " below " or " following " just will be positioned at miscellaneous part or feature so.Therefore, exemplary term " following " can comprise top and following two kinds of orientations.Device also can be located (rotate 90 degree or on other orientations) by other means and correspondingly be used space relative descriptors herein to make an explanation.

For simple and/or clear for the purpose of, known function or structure are not described in detail.

Herein the term of Shi Yonging " and/or " comprise one or more associated listed items arbitrarily and all combinations.

The term of Shi Yonging only is should not be understood that limitation of the present invention for the purpose of describing specific embodiment herein.Unless clear indicating in the literary composition, otherwise singulative as used herein " " and " being somebody's turn to do (described) " should be understood that also to have comprised plural form.It should be further apparent that, when using term " to comprise " in the specification and/or when " comprising ", it represents described feature, operation, the existence of element and/or parts, but do not get rid of other one or more features, operation, the existence of element and/or parts and/or its combination.

Unless otherwise defined, term as used herein (comprising technology and scientific and technical terminology) has the known identical meanings of those skilled in the art.It should be further apparent that, unless clearly definition is arranged herein, otherwise for example defined term should be interpreted as having and the consistent connotation of implication in the context of correlation technique in the common dictionary, and should not explained with idealized or too formal mode.

Unless otherwise statement, otherwise use " fixing ", " connection ", " interconnecting ", " contact ", the place of " installation " and similar terms all means direct or the indirect fixing or contact between the parts.

According to embodiments of the invention, the communications connectors that is provided comprises inductive and/or capacitively coupled " parasitic conductive loops " between one or more target conductor that are used to change in the communications connectors.Can show reduction according to the communications connectors of the embodiment of the invention to the level of differential cross-talk difference between the conductor wherein and/or common mode crosstalk difference.

The term of Shi Yonging " conductive loop " expression herein is a kind of to form the conducting parts that closure or circulating path flow through for electric current.Because conductive loop is closed path, the signal of telecommunication that therefore is introduced in the part of conductive loop can and return the position that it is introduced into this loop around this loop transmission.Term " loop " expression be the fact that a closed path has been determined in the loop, rather than limit the invention to and have any specific two dimension or the loop of 3D shape.For example, can be circular according to the conductive loop of the embodiment of the invention, ellipse, rectangle, parallelogram, the combination of shape such as rhombus or these shapes.Conductive loop can be three-dimensional in essence also, and/or can comprise more than a closed path.For example, on the ground floor of printed circuit board (PCB), process the first L shaped trace by (1), (2) on the second layer of printed circuit board (PCB), process the second L shaped trace, (3) a pair of plated metal hole is set and connects two traces, conductive loop just can be formed on the printed circuit board (PCB) with from above have the shape of rectangle when looking.

" passive " parts of Shi Yonging (also can be called as " passive coupling parts ") expression herein is a kind of directly not to be electrically connected to one or more second parts, but is set to receive from one or more second parts by capacitive character and/or inductive couplings the parts of crosstalk signal.Therefore, " parasitic conductive loops " just represents the conducting path of a kind of closed-loop path form, it is positioned near one or more second parts but physics does not contact one or more second parts, so that crosstalk signal is by inductive and/or capacitively be coupled on the conducting path of closed-loop path form from one or more second parts.

Fig. 1 shows a kind of communication system 1 according to the embodiment of the invention, and parasitic conductive loops 4 wherein and two

conductors

2,3 interact.As shown in Figure 1, communication system 1 comprises at least two

conductors

2,3, and it is represented as cable in the embodiment shown in fig. 1.But, should be appreciated that, embodiments of the invention can be applied to the arbitrary portion printed circuit board (PCB) for example in the communication path, binding post, plug slice, Outlet line contact etc., thus the conductor shown in Fig. 12,3 only be according to embodiments of the invention as can with an example of the interactional types of conductors of parasitic conductive loops.

As shown in Figure 1, parasitic conductive loops 4 is set near conductor 2,3.In the communication system that Fig. 1 exemplifies,

conductor

2,3 comprises two cables that constitute differential pair.Therefore, but equal and opposite in direction opposite polarity signal are by transmission on

cable

2,3 simultaneously.In Fig. 1, represent that with arrow 5 and 7 electric current in

cable

2 and 3 flows respectively, wherein each arrow has all indicated sense of current.As shown in Figure 1, electric current 5 produce the magnetic field 5 of counter clockwise direction (from Fig. 1 top) around conductor 2 '.Because very approaching between the left part 8 of parasitic conductive loops 4 and the conductor 2, so magnetic field 5 ' meeting is at induced current 6 on the parasitic conductive loops 4 (shown in the arrow among Fig. 1).This induced current 6 will be along flowing with the side of electric current 5 in the opposite direction, and therefore, as shown in Figure 1, the magnetic field 6 that produces by electric current 6 ' along clockwise direction around loop feature 8.

Because parasitic conductive loops 4 is closed paths,, the electric current 6 of inducting on the loop 4 flows so will trending towards along the loop 4.Because the direction in loop 4 changes at the diverse location place, the therefore magnetic field 6 that produces by electric current 6 ' also can change direction.So, for example, as shown in Figure 1, the magnetic field 6 on the right side of parasitic conductive loops 4 part 9 ' in the counterclockwise direction around loop feature 9.

As shown in Figure 1, magnetic field 6 ' extend around right side part 9 in the counterclockwise direction is by the magnetic field 7 ' then extension along clockwise direction of electric current 7 generations of flowing in the conductor 3.Therefore, magnetic field 6 ' will trend towards offset magnetic field 7 in the near zone of conductor 3 ' at least a portion.In communication system 1, magnetic field 7 ' partial offset will reduce the ability of (not shown in figure 1) induced current on electric current 7 nigh other conductors that flow through conductor 3.Therefore, as shown in Figure 1, by producing offset magnetic field, can be used to reduce crosstalking in the communication system according to the parasitic conductive loops of the embodiment of the invention.Be appreciated that similarly parasitic conductive loops also can be used to offset electric field, and the method for one exemplary embodiment introduction can be set to provide this electric field neutralisation similarly according to the present invention herein.It is also understood that further single parasitic conductive loop can be used to provide simultaneously magnetic field and electric field neutralisation.

2-9 introduces the communications connectors of the further embodiment according to the present invention below with reference to accompanying drawings.In accompanying drawing 2-9, be used in the 110 type interconnection cable systems according to the method for the embodiment of the invention.But should be appreciated that embodiments of the invention have comprised the connected system of multiple other types, for example comprise modular plug, modular jack, non-110 molded lines cable link blocks etc.

Fig. 2 shows a kind of 110 type interconnection communication systems 10, and this is a kind of communication system of known type, is often used in the wiring closet that connects a large amount of input and output cable systems.Communication system 10 comprises the field wiring Cable Termination Equipment that is used for organization and management cable and wiring installation.Communication apparatus 10 is usually located in the canyon and provides terminal and the interconnection of socket equipment, switchgear, processor device and main line (vertical or groups of building) wiring.Cross-coupled communication system 10 is usually located in the communication room and provides terminal and the interconnection of level (to the working region) and main line wiring.Interconnection can provide the circuit of the common equipment circuit that high efficient and convenient leads to building or groups of building different parts to select and circuit is selected again.

As shown in Figure 2, communication system 10 has the connector port 15 that is provided with in horizontal mode.Each row's connector port 15 all comprises the conductor seat formula array 14 that is commonly referred to as " index strips ".Conductor (cable just) 16 is set between the connectivity port 15.As shown in Figure 2, in case conductor 16 is in place, link block 22 just is set on the index strips 14 and with conductor 16 and is electrically connected.Each link block 22 can comprise a plurality of insulation displacement contacts (IDC) that slot in unshowned two ends in Fig. 2.The end of each IDC all electrically contacts with one section conductor, 16 formation that are contained in the index strips 14.The other end of each IDC all forms with interconnection cable (not shown) and is electrically connected, and perhaps the contact of the patch 28 at port 25 places that limit with the IDC24 that terminates in by link block 22 tops forms and is electrically connected.Fig. 2 shows level four row, and the link block 22 that every row are six, each link block 22 all are installed in the top (part of having only an index strips 14 in Fig. 2 is visible) of four index strips 14 in the standard terminal module 12.Spacing between the index strips 14 constitutes the groove that is used as cable or cross-coupled cable passage usually.Conductor 16 is passed cable trough and other cable guide mechanism and is arrived their terminal interfaces that is fit in index strips 14.

As shown in Figure 3, a kind of exemplary link block 22 can comprise 48, eight IDC 24a-24h of 40, two Lock Parts of main casing and four parasitic conductive loops 60a-60d.Hereinafter introduce these parts with reference to Fig. 4-6.

Fig. 5 shows a kind of exemplary IDC of link block 22, IDC 24a.IDC is a kind of binding post of known type.Usually, binding post is meant a kind of electric contact (the perhaps electric contact of certain other types) at one end (perhaps being at its two ends) receiving cable or inserted sheet under the situation of double flute IDC.IDC 24a normally the plane and by electric conducting material for example phosphor bronze alloy make.IDC 24a comprises and has the 30a of fork-shaped portion, the lower end 30 of 30b, have the 32a of fork-shaped portion, the upper end 32 of 32b and transitional region 34, the 30a of fork-shaped portion wherein, 30b has determined to be used to receive the open-ended groove 31 that connects conductor, and the 32a of fork-shaped portion, 32b have determined to be used to receive the open-ended groove 33 that another connects conductor.Each

groove

31,33 is all interrupted by little tie rod 36, and in manufacture process, tie rod 36 provides certain degree of hardness for the fork-shaped portion of IDC 24a, and tie rod can split in the process of going into

groove

31,33 but " dash downwards " at conductor.Setovering each other in lower end 30 and upper end 32, makes groove 31, but 33 substantially parallel not conllinear.Offset or dish " j " between the

groove

31,33 in lower end 30 and the upper end 32 can be for example between about 0.080 inch to 0.150 inch.In a specific embodiment of this introduction, distance " j " can be 0.096 inch.

Referring now to Fig. 3 and Fig. 4, can be by the insulating material main casing 40 made of Merlon for example, have and be used for flange 41 that the link block on the index strips 14 is alignd with its accessory.Main casing 40 comprises the direct through groove 42 that is separated by separator 43, and the size of each groove 42 all is confirmed as being used to receive the upper end 32 of IDC 24a-24h.Main casing 40 further comprises and being between the groove 42 and perpendicular groove 47.The size of each groove 47 all is determined and is set to be used to receive one of parasitic conductive loops 60a-60d.The upper end of main casing 40 has a plurality of pillars 44 that separated by otch 46.Otch 46 exposes the inward flange of the open-ended groove 33 of IDC upper end 32.Main casing 40 also comprises the hole 50 that is positioned on each side.As shown in Figure 3, Lock Part 48 comprises the locking projection 52 in the hole 50 that is contained in main casing 40.

As shown in Figure 3, link block 22 can be assembled as follows.IDC 24a-24h is inserted in the groove 42 of main casing 40 from its lower end.The upper end 32 of IDC 24a-24h is fitted in the groove 42, and the groove 33 of the upper end 32 of IDC 24a-24h comes out by the otch in the main casing 40 46.Parasitic conductive loops 60a-60d is inserted in one of them corresponding in the main casing 40 groove 47 from its lower end.The upper end of parasitic conductive loops 60a-60d can be stretched in the corresponding pillar 44 in main casing 40 upper ends.In case IDC 24a-24h and parasitic conductive loops 60a-60d are in place, Lock Part 48 promptly is inserted in the hole 50 and immediately by ultrasonic bonding, and adhesive bonds engages to fasten and connects, and perhaps other suitable interconnection techniques are fixed.A kind of locking mechanism (not shown among Fig. 3-5) also can be set to keep the position of parasitic conductive loops 60a-60d.

As can be seen, in case be in the main casing 40, IDC 24a-24h promptly is set to be substantially two rows on plane from Fig. 4 and Fig. 6, wherein IDC 24a-24d in a row and IDC 24e-24h in second arranges.Because " staggering " in the IDC (biasing between IDC upper end 32 and the lower end 30 just), the upper end 32 of the IDC 24a-24d among the row of back intermeshes with the upper end 32 of the IDC 24e-24h of first line center.Similarly, because " staggering " in the IDC, the lower end 30 of IDC 24a-24d intermeshes with the lower end 30 of IDC 24e-24h.At Fig. 3, among the embodiment of Fig. 4 and link block 22 shown in Figure 6, the transitional region 34 of IDC is alignment (for example, the transitional region 34 of IDC 24a is directly passed from the transitional region 34 of IDC 24e) among the row relatively.In other embodiment, the transitional region 34 of relative IDC also can intermesh.

Still as shown in Figure 6, it is right that IDC 24a-24h can be divided into TIP-RING IDC, and shown in following table 1, wherein according to convention, TIP is a positive polarization terminal and RING is the negative polarization terminal.Each RING of IDC centering all one row in, and each TIP of IDC centering all another row in.

Still as shown in Figure 6, the length of each IDC 24a-24h can be distance " k ".In an one exemplary embodiment of the present invention, " k " can be about 800mil.In the exemplary embodiment of figure 6, the distance between the adjacent slot of the IDC of an IDC centering " j " can be about 96mil.In the exemplary embodiment of figure 6, the distance " 1 " between the groove of adjacent IDC can be about 260mil among the same row IDC.Also show parasitic conductive loops 60a-60d among Fig. 6.As shown in the figure, in the one exemplary embodiment of Fig. 6, the distance " i " between the center of edge that IDC is right and corresponding parasitic conductive loops 60a-60d can be about 30mil.The first row IDC and the second row IDC can at interval about 70mil.

Parasitic conductive loops 60a among Fig. 3 is shown in Figure 7.As shown in Figure 7, parasitic conductive loops 60a has right side loop feature 61a, left side loop feature 63a, top loop feature 62a and bottom loop feature 64a.As more detailed introduction herein, according to embodiments of the invention, signal energy can be from IDC 24a, 24b, and 24e, the one or more parasitic conductive loops 60a that are coupled among the 24f go up (referring to Fig. 3).From IDC 24a, 24b, 24e, a signal energy that is coupled on the parasitic conductive loops 60a among the 24f will trend towards wraparound road 60a transmission subsequently.

In the embodiment of Fig. 2-9, passive ring 60a-60d can be of similar shape and structure.In an one exemplary embodiment, the length " m " of right side loop feature 61a and left side loop feature 63a is approximately 730mil, and the length " n " of top loop feature 62a and bottom loop feature 64a is approximately 140mil.Loop 60a can for example use the conductor that is considered to " well " arbitrarily for operating frequency, copper for example, and stainless steels etc. are made, and can have for example thickness of 5mil " x ".The inside opening of loop 60a can be that about 650mil about 60mil that grows up is wide.Should be appreciated that above-mentioned size all is exemplary, provide these sizes so that the disclosure is comprehensively with complete.Should be appreciated that different shape, the loop 60a that size etc. are different can be used to replace the exemplary loop 60a shown in Fig. 7.

Fig. 8 is to tackling 1 and to 2 IDC 24a, 24e, and 24b, the perspective view of 24f is equipped with parasitic conductive loops 60a therebetween, and will be installed in the main casing 40 of the link block 22 among Fig. 3.In Fig. 8, main casing 40 is omitted to clearly show that the be provided with situation of parasitic conductive loops 60a with respect to IDC.As shown in Figure 8, the upper end of IDC 24e is set to be close to the upper end of left side loop feature 63a, and staggers from left side loop feature 63a in the lower end of IDC 24e.Similarly, the lower end of IDC 24f is set to be close to the lower end of left side loop feature 63a, and staggers from left side loop feature 63a in the upper end of IDC 24f.Similarly, the upper end of IDC 24b is set to be close to the upper end of right side loop feature 61a, and staggers from right side loop feature 61a in the lower end of IDC 24b.At last, the lower end of IDC 24a is set to be close to the lower end of right side loop feature 61a, and staggers from right side loop feature 61a in the upper end of IDC24a.The result, IDC 24a, 24e, 24b, main coupling between 24f and the parasitic conductive loops 60a will comprise from the upper end of IDC 24e to the coupling of left side loop feature 63a upper end, from the lower end of IDC 24f to the coupling of loop feature 63a lower end, left side, from the upper end of IDC 24b to the coupling of right side loop feature 61a upper end and from the lower end of IDC 24a to the coupling of loop feature 61a lower end, right side.

Introduce the operation of parasitic conductive loops 60a referring now to Fig. 8.As mentioned above, IDC 24a and 24e comprise a pair of IDC that is used to transmit first differential signal.Therefore, but IDC 24a and 24e have equal and opposite in direction opposite polarity signal.So same for IDC 24b and 24f.In Fig. 8, use bold arrow 71a respectively, 71b, 71e and 71f represent the 24a by IDC, 24e, the main signal (just needed signal) of 24b and 24f transmission, wherein arrow has indicated the direction of signal transmission.Therefore, in the embodiment of Fig. 8, signal 71a is by IDC 24a also transmission left downwards, and signal 71b passes through IDC 24b to be transmitted downwards and left, and signal 71e makes progress by IDC 24e and transmission to the right, and signal 71f passes through upwards also transmission to the right of IDC 24f.

Still as shown in Figure 8, because approaching between the upper end of the upper end of IDC 24e and left side loop feature 63a, signal 71e is at the upper end of left side loop feature 63a induced signal 72e.Induced signal 72e is along the direction transmission opposite with the transmission direction of signal 71e, so the signal 72e of arrow indication goes to bottom loop feature 64a downwards along left side loop feature 63a.Therefore, signal 72e is after being inducted in the upper end of left side loop feature 63a, and transmission is by the lower end of left side loop feature 63a, and the lower end that is transmitted in this close IDC 24f of signal 72e.Because this approaching, signal 72e is induced signal 73e on the lower end 30 of IDC 24f.Induced signal 73e is along the direction transmission opposite with the transmission direction of signal 72e, so the signal 73e of arrow indication along IDC 24f upwards.

Shown in Fig. 8 was further, signal 72e continues wraparound road 60a to be transmitted along the direction of arrow (just in the counterclockwise direction).After through bottom loop feature 64a, signal 72e continues to transmit along right side loop feature 61a.About the mid portion of right side loop feature 61a, near the upper end of signal 72e through IDC 24b, therefore, signal 72e is at the upper end of IDC 24b 32 induced signal 74e greatly.Induced signal 74e is along the direction transmission opposite with the transmission direction of signal 72e, so the signal 74e of arrow indication is downward along IDC 24b.Loop 60a goes up the signal 72e that keeps and continues wraparound road 60a transmission in the counterclockwise direction.

Similar with IDC 24e, IDC24a is induced current on parasitic conductive loops 60a also.Especially because approaching between the lower end of the lower end of IDC 24a and right side loop feature 61a, along the signal 71a of IDC 24a transmission downwards at the lower end of right side loop feature 61a induced signal 72a.Induced signal 72a is along the direction transmission opposite with the transmission direction of signal 71a, so the signal 72a of arrow indication upwards goes to top loop feature 62a along right side loop feature 61a.Therefore, signal 72a is after being inducted in the lower end of right side loop feature 61a, and transmission is by the upper end of right side loop feature 61a, and the upper end that is transmitted in this close IDC 24b of signal 72e.Because this approaching, signal 72a is induced signal 73a on the upper end 32 of IDC 24b.Induced signal 73a is along the direction transmission opposite with the transmission direction of signal 72a, so the signal 73a of arrow indication is downward along IDC24b.

Shown in Fig. 8 was further, signal 72a continues wraparound road 60a to be transmitted along the direction of arrow (just in the counterclockwise direction).After through top loop feature 62a, signal 72a continues to transmit along left side loop feature 63a.About the mid portion of left side loop feature 63a, near the lower end of signal 72a through IDC 24f, therefore, signal 72a is at the lower end of IDC 24f induced signal 74a greatly.Induced signal 74a is along the direction transmission opposite with the transmission direction of signal 72a, so the signal 74a of arrow indication along IDC 24f upwards.Loop 60a goes up the signal 72a that keeps and continues wraparound road 60a transmission in the counterclockwise direction.

If parasitic loop 60a is not set, so just existence is crosstalked, for example, IDC 24f will comprise the sum of crosstalking (existing inductive has capacitive character again) of being inducted by IDC 24e and IDC 24a on IDC 24f.If the distribution of IDC and/or towards cause IDC 24a and IDC 24e the crosstalking of different size of inducting on IDC24f so just can't offset fully, and remaining unmatched crosstalking will show as the interference (noise) to the information signal on the IDC 24f.Crosstalk and not only to comprise NEXT but also comprise FEXT by what IDC 24a and IDC 24e inducted on IDC 24f.Just as one of ordinary skill in the known, NEXT equals differential electrical capacitive on IDC24f and inductive couplings sum between IDC 24a and the 24e, and FEXT equals the poor of the differential electrical capacitive on IDC 24f and inductive couplings between IDC 24a and the 24e.

Parasitic loop 60a changes this balance in two ways.The first, the size of crosstalking on the existence of parasitic loop 60a can directly reduce from IDC 24a and 24e to IDC 24f.The second, as mentioned above, the signal 72e that inducts on the parasitic conductive loops 60a, 72a is induced current 73e and 74a on IDC 24f.Always crosstalk in order to reduce and/or to minimize induct from IDC 24a and 24e to IDC 24f unmatched, the size of parts (for example IDC, parasitic conductive loops and groove inner cable) and physics set-up mode relative to each other thereof can be designed as and make that the crosstalk signal sum of inducting on the IDC 24f is less.Inductive cross-talk also can use parasitic conductive loops to regulate to optimize NEXT and FEXT balance simultaneously with respect to the size of capacitive cross-talk.Link block can be designed for similarly to be reduced and/or minimizes from IDC 24a and 24e to crosstalking that IDC 24b inducts, and crosstalking on from

IDC

24b and 24f to each IDC 24a and 24e.

Parasitic conductive loops 60a can help to offset the method for crosstalking also can be by analyzing IDC simultaneously at 24e, the electromagnetic field that produces in 24a and the parasitic loop 60a and being understood.Especially, Fig. 9 is the sectional view along the intercepting of the I-I line among Fig. 8.As above described about introducing of Fig. 8, suppose in the present embodiment to enter in the page of Fig. 9 by the signal of IDC 24e transmission.Therefore, the magnetic field 80e that is produced by the electric current that flows through IDC 24e extends along clockwise direction.Similarly, when the signal that flows through IDC 24a spread out of the page of Fig. 9, this signal produced the magnetic field 80a that extends in the counterclockwise direction.Still as above described about introducing of Fig. 8, electric current 72a and 72e (not shown among Fig. 9) are inducted on parasitic conductive loops 60a by IDC 24a and 24e respectively.Two strands of electric currents flow along equidirectional.On the loop feature 61a of right side, electric current 72a and 72e flow (just flowing into the page of Fig. 9) to top loop feature 62a, and extend along clockwise direction in therefore corresponding magnetic field 81.Similarly, on the loop feature 63a of left side, electric current 72a and 72e flow (just flowing out the page of Fig. 9) to bottom loop feature 64a, and extend in the counterclockwise direction in therefore corresponding magnetic field 82.

Concentrate the

magnetic field

80e and 82 that introduces among Fig. 9 now, can find out that

magnetic field

80e and 82 is directed downwards in the zone 83 that just is arranged in IDC 24e right side and parasitic conductive loops 60a left side, therefore superpose.But, in the zone 84 that just is arranged in regional 83 left sides (far-end in loop just), magnetic field 82 points upwards, therefore the magnetic field 80e with directed downwards is opposite.As a result,

magnetic field

80e and 82 trends towards cancelling each other out in 84 in the zone, therefore reduces and/or has minimized IDC 24a to 1, and 24e is applied to the poor of differential cross-talk signal on the IDC 24f.Therefore same analysis demonstrates magnetic field 80a and 81 and trends towards cancelling each other out in the zone on parasitic conductive loops 60a right side, similarly reduces and/or has minimized IDC 24a to 1, and 24e is applied to the poor of differential cross-talk signal on the IDC 24b.

Although what introduce in the foregoing description is a kind of link block 22 that comprises staggered IDC 24a-24h that is equipped with, should be appreciated that parasitic conductive loops of the present invention also can use conventional straight line dual grooved IDC.In such embodiments, the planar parasitic conductive loop that is similar to the loop 60a of above-mentioned introduction can be used, and perhaps alternatively, the parasitic conductive loops that three-dimensional parasitic conductive loops for example comprises concavo-convex wiring (jog) also can be used.It should be further apparent that parasitic conductive loops does not need to be set between the IDC, but other the loop that can make holds the position of the electric current of inducting from one or more interference conductors near can being set at, and can utilize induced current to produce magnetic field to help to reduce crosstalking in the connector in the second place subsequently.

Similarly, in certain embodiments of the present invention, passive ring 60a-60d do not need to be set at each IDC between.For example, only have been found that by just obtaining tangible performance and improve in that passive ring 60 (rather than four IDC in each link block 22 between passive ring all is set) being set between each adjacent link block 22.Passive ring 60 can be installed in an end of each link block 22 like this, perhaps comprises the individual components that is installed between the adjacent link block 22 alternatively.

Should also be appreciated that the method for above-mentioned discussion can be applicable to the communications connectors of other types equally.For example, the multiple and incompatible cross connect system of 110 type interconnection cable systems well known in the art.Parasitic conductive loops according to the embodiment of the invention can be used to these systems equally.

Should also be appreciated that IDC and IDC electric current to the active strength that do not need all on parasitic conductive loops, to induct.For example, in the embodiment that as above introduces about Fig. 2-9, IDC 24a transmits (stack just) with the signal that 24e inducts along identical direction wraparound road on parasitic conductive loops.But, also can use and be designed so that 24a from IDC, one of 24e inducts bigger electric current simultaneously from IDC 24a on the loop, the opposing party of 24e induct on the loop very little electric current or the connector of induced current not also can be realized the reduction of crosstalking.Therefore, although induced current on parasitic conductive loops all in two right IDC of IDC of symmetry in the above-mentioned one exemplary embodiment should be appreciated that this is not a necessary condition.

Be also to be understood that for any reduction and crosstalk for the system, crosstalk the part of system or the size of conducting parts that the reduction system of crosstalking is worked as reduction, shape, towards, positions etc. must be selected as providing the crosstalk counteracting of proper level.At this, such parameter comprises the shape of one or more parasitic conductive loops and all dimensional parameters relevant with these loops (thickness for example at least, dimension etc.), the conducting parts of the received energy and/or the energy of on parasitic conductive loops, inducting (contact for example therefrom, cable etc.) shape size, distance between the conducting parts and parasitic loop and each this conducting parts relative to each other towards etc.In addition, between the cable in the right IDC of the groove 31,33 that is inserted into each IDC 24a-24h and near parasitic conductive loops and/or near IDC capacitive couplings may take place.Therefore, when adjusting design, the length of these cables and cable also should be taken into account with respect to the relative position of parasitic conductive loops and/or near IDC.In addition, although above-mentioned description concentrates on the inductive couplings effect between IDC 24a-24h and the parasitic conductive loops 60a-60d, should be appreciated that between IDC and parasitic conductive loops also the capacitive couplings effect can occur.This capacitive couplings also need be taken into account to obtain the required reduction level of crosstalking when design.In the embodiment of above-mentioned Fig. 2-9, mainly comprise inductive couplings between IDC 24a-24h and its corresponding parasitic conductive loops 60a-60d.But in other design, the capacitive couplings effect may be main.

Should also be appreciated that can set up one is not the parasitic conductive loops of closed path.Especially, a loop can be set up as the breach that comprises that in the loop one or more is very short, so that the big electric capacity that can allow electric current to cross over these slits effectively to be provided.

The further embodiment according to the present invention provides the modular plug that comprises parasitic conductive loops.Figure 10 is the decomposition diagram that comprises the modular plug 111 of such parasitic conductive loops.As shown in figure 10, modular plug 111 comprises outer shell component 112, and its inside with hollow is used to hold cable and organizes deconcentrator 113.Housing 112 and deconcentrator 113 can be made by suitable insulation material (for example plastics).Cap or cover 114 are set to be mounted and fixed on the deconcentrator 113.The connector end 118 of deconcentrator 113 has a plurality of parallel grooves 115, wherein is adapted at packing into from many leads of a cable (not shown) with parallel relation in the planar array.Housing 112 has the conductor arrangement zone in its connector end 119, and it has a plurality of (for example eight) groove 120 can insert inserted sheet contact component 121.Contact component 121 has the tip and is used to pierce through the insulating barrier of groove 115 inner cable to electrically contact with its formation.The socket spring formation that inserted sheet 121 is successively set in the socket (not shown) that is used for and holds plug 111 in the groove 120 electrically contacts.

Some industrial standards (for example TIA/EIA-568-B.2-1 standard of being passed through on June 20th, 2002 by telecommunications industry association) have stipulated that the modular plug that comprises eight cables altogether is designed to transmit four groups of differential signals (four differential pairs just).According to these standards, points of engagement place between modular plug and modular jack, the cable of first differential pair is placed in two medial launders interior (groove 4 and 5) of groove 120, the cable of second differential pair is placed in two grooves in the leftmost side interior (groove 1 and 2) of groove 120, the cable of the 4th differential pair is placed in two grooves in the rightmost side interior (groove 7 and 8) of groove 120, and the cable of the 3rd differential pair is placed in all the other two grooves interior (groove 3 and 6) of groove 120.Therefore, at the join domain of the contact 121 of the modular plug 111 of the contact that engages respective modules formula socket (not shown among Figure 10), the cable of differential pair and the cable of other differential pairs are not equidistant at least.This may cause undesirable crosstalking, and for example comprises from cable 3 to the difference of cable to 2 and 4 common mode crosstalks of inducting.

In order to reduce the difference of this common mode crosstalk, can be in deconcentrator 113 fitting printed circuit board 130.As shown in figure 10, parasitic conductive loops 132 is set on the printed circuit board (PCB) 130.Printed circuit board (PCB) 130 is fitted on the cable (not shown) that places in the groove 115.In the embodiment of the invention shown in Figure 10, parasitic conductive loops 132 is rectangular-shaped loops, comprises right side part 134, left part 136, rear section 138 and front part 140.Parasitic conductive loops 132 can be used to for example inductive ground coupling from the signal energy of more close cable in the differential pair 3 to a cable (for example cable 3) of 4 (cables 7 and 8).Especially, printed circuit board (PCB) 130 can be provided so that the left part 136 of parasitic conductive loops 132 is positioned at cable 3 tops substantially, and the right side part 134 of parasitic conductive loops 132 is positioned at cable 6 tops substantially.The signal 142 that transmission will be inducted on the left part 136 of parasitic conductive loops 132 and transmit in opposite direction by the signal of cable 3.Suppose that as an example, transmission is transmitted along the inserted sheet direction of modular plug 111 by the signal of cable 3, signal 142 just will transmit to the rear section 138 in loop 132 so, and passes through front part 140 transmission of the right side part 142 in loop to the loop subsequently.In this manner, can provide the signal with identical polar that is positioned at cable 3 near cable 7 and 8, this can help to reduce/offset from cable 6 and be coupled to signal energy on cable 7 and 8.Parasitic loop 132 also will advantageously be coupled and enter the signal energy of cable 1 and 2 near zones from cable 6, reduce thus to 3 to difference to 2 common mode crosstalks of inducting.Should be appreciated that parasitic loop 132 is not to be set on the printed circuit board (PCB), but the conductive rings that can for example be installed in the insulated part of plug casing 112 replaces.

According to a further embodiment of the invention, parasitic conductive loops also can be set in the modular jack.For example, and how passive loops 132 is arranged near the similar of modular plug 111 among Figure 10, the printed circuit board (PCB) that comprises parasitic conductive loops can be set near the lead frame of modular jack so that the compensation of inductive cross-talk to be provided.

According to a particular embodiment of the invention, the cable connecting system that is provided comprises installation base plate, is installed in the first couple and second pair of wire connection terminals in the installation base plate, and near the parasitic conductive loops of installing first binding post of first pair of wire connection terminals.Such cable connecting system comprises for example having and is installed in cable and connects the first couple in the housing and the cable link block of second couple of IDC.

The further embodiment according to the present invention provides the reduction that the is used for communications connectors circuit of crosstalking.This reduction circuit of crosstalking can be designed as parasitic conductive loops, and this parasitic conductive loops is set to receive the parasitic conductive loops of the electric current of inducting first magnetic field that first signal that transmits from first conductor of connector produces.Wherein the electric current of inducting on the parasitic conductive loops produces the 3rd magnetic field to offset second magnetic field of the secondary signal generation of transmitting on second conductor by connector at least in part.

Other the embodiment according to the present invention, the communications connectors that is provided comprises the passive coupling parts, near second conductor near first conductor the first of passive coupling parts and the second portion of passive coupling parts.In these connectors, the passive coupling parts are set to be coupled and have comprised compensate for crosstalk signal from first conductor energy to the signal of second conductor transmission.The direction that the sense that the compensate for crosstalk signal of this coupling produces with crosstalk signal in the second conductor upper edge is opposite is inducted.

Or further embodiment according to the present invention, the communications connectors that is provided comprises the first pair of contact that is set to receive first differential signal, be set to receive second pair of contact of second differential signal, and be arranged on the passive coupling parts between first pair and the second pair of contact.These passive coupling parts receive first induced signal and second induced signal with identical polar from two contacts of first pair of contact respectively.

Remain additional embodiments, the method that is used to reduce the differential cross-talk signal of inducting to the 3rd conductor of communications connectors from first pair of conductor is provided according to the present invention.According to these methods, crosstalk signal is inducted from the signal that transfers to parasitic conductive loops first by a conductor first pair of conductor offsets by second magnetic field of transmission by the signal generation of another conductor in first pair of conductor at least in part to produce around first magnetic field of parasitic conductive loops second portion.

Or the further embodiment according to the present invention, third and fourth binding post that the cable link block that is provided comprises first and second binding posts of having determined first row's binding post and determined to be basically parallel to second row's binding post of first row's binding post.The cable link block further comprises the inductive couplings parts that are set to inductive ground coupling energy from the signal that first binding post to the, four binding posts transmit.

Be to schematic description of the present invention above, and can not be interpreted as it is qualification it.Though by the agency of one exemplary embodiment of the present invention, those of ordinary skills can recognize at an easy rate in essence not and deviate under the situation of the enlightenment of novelty of the present invention and advantage thereof, can much revise one exemplary embodiment.Therefore, all such modifications all are understood to include in by the scope of the present invention that claims limited.The present invention is limited by following claim, comprising the equivalent of claim.

Claims

1, a kind of cable connecting system comprises:

Installation base plate;

Be installed in first pair of wire connection terminals in the described installation base plate;

Be installed in second pair of wire connection terminals in the described installation base plate; With

Be installed near the parasitic conductive loops of at least the first binding post of described first pair of wire connection terminals.

2, cable connecting system as claimed in claim 1, the first of wherein said parasitic conductive loops is set to receive induced signal from least the first binding post of described first pair of wire connection terminals, and the second portion of wherein said parasitic conductive loops is provided so that the induced signal of reception produces magnetic field near at least one binding post of described second pair of wire connection terminals.

3, cable connecting system as claimed in claim 1, wherein said parasitic conductive loops are installed between described first pair and second pair of wire connection terminals.

4, cable connecting system as claimed in claim 1, wherein said binding post comprise insulation displacement contacts (IDC).

5, cable connecting system as claimed in claim 4, wherein each IDC is included in the groove that its relative top and bottom are used to hold conductor, and IDC is installed to be at least two rows in installation base plate, wherein all substantially parallel the and conllinear not of the groove of each IDC.

6, cable connecting system as claimed in claim 1, wherein said parasitic conductive loops is set to receive along first induced signal of first direction wraparound road transmission from first binding post of first pair of wire connection terminals, and receives along second induced signal of first direction wraparound road transmission from second binding post of first pair of wire connection terminals.

7, cable connecting system as claimed in claim 1, wherein said first pair of wire connection terminals comprises first insulation displacement contacts (IDC) and the 2nd IDC, wherein said second pair of wire connection terminals comprises the 3rd IDC and the 4th IDC, the wherein said first and the 3rd IDC is first row's part of IDC and the described second and the 4th IDC is the part of the second row IDC, and wherein said parasitic conductive loops is set to coupling energy from the signal that an IDC to the four IDC transmit.

8, cable connecting system as claimed in claim 7, wherein said parasitic conductive loops further is set to coupling energy from the signal of the 2nd IDC to the three IDC transmission.

9, cable connecting system as claimed in claim 1, wherein said cable connecting system comprise 110 molded lines cable link blocks.

10, cable connecting system as claimed in claim 1, the first of wherein said parasitic conductive loops sets its size according to first binding post of described first pair of wire connection terminals, shape and position, with first crosstalk signal of on parasitic conductive loops, from the signal of first binding post transmission, inducting, and the second portion of wherein said parasitic conductive loops is set its size according to one of them binding post of described second pair of wire connection terminals, shape and position are with second crosstalk signal of inducting from described first crosstalk signal on a described binding post of second pair of wire connection terminals.

11, cable connecting system as claimed in claim 1, wherein said parasitic conductive loops are set to receive first induced signal and all induct the compensate for crosstalk signal on two binding posts of described second pair of wire connection terminals from least the first binding post of first pair of wire connection terminals.

12, cable connecting system as claimed in claim 1, wherein said first pair of wire connection terminals are the parts of first link block, and wherein said second pair of wire connection terminals part that is second Wiring module.

13, cable connecting system as claimed in claim 1, it is right that wherein said first pair and second pair of wire connection terminals are included in binding post adjacent in first link block.

14, cable connecting system as claimed in claim 1, wherein said magnetic field are offset second magnetic field that second binding post by described first pair of wire connection terminals is produced at least in part.

15, a kind of reduction that is used for communications connectors circuit of crosstalking, communications connectors comprise first conductor that transmits first signal and second conductor of transmission secondary signal, and the described reduction circuit of crosstalking comprises:

Be set to receive the parasitic conductive loops of the electric current of inducting from first magnetic field that first signal produces, the induced current on the wherein said parasitic conductive loops produces the 3rd magnetic field to offset second magnetic field that is produced by described secondary signal at least in part.

16, the reduction as claimed in claim 15 circuit of crosstalking, wherein said first and second signals comprise equal and opposite in direction but opposite polarity signal.

17, the reduction as claimed in claim 15 circuit of crosstalking, the first of wherein said parasitic conductive loops near described first conductor and the second portion of wherein said parasitic conductive loops near described second conductor, the part that near the part in the 3rd magnetic field the wherein said parasitic conductive loops first has near the 3rd magnetic field first direction and the described parasitic conductive loops second portion has the second direction opposite substantially with first direction.

18, the reduction as claimed in claim 15 circuit of crosstalking, wherein said first conductor comprises first conductor of the pairs of conductors of modular plug, and wherein said second conductor comprises second conductor of described pairs of conductors, and but wherein said first and second signals comprise equal and opposite in direction opposite polarity signal.

19, the reduction as claimed in claim 18 circuit of crosstalking, wherein said modular plug comprises that the contact region that is positioned at modular plug keeps first of adjacent and coordination, second, the 3rd, the 4th, the 5th, the 6th, the the 7th and the 8th contact, the the wherein said the 4th and the 5th contact comprises the first pair of contact that is used to transmit first differential signal, described first and second contacts comprise the second pair of contact that is used to transmit second differential signal, the the described the 3rd and the 6th contact comprises the 3rd pair of contact that is used to transmit the 3rd differential signal, the the described the 7th and the 8th contact comprises the 4th pair of contact that is used to transmit the 4th differential signal, wherein said the 3rd pair of contact is set between described first pair of contact in the described modular plug contact region, and wherein said first conductor is electrically connected to a contact in described the 3rd pair of contact and wherein said second conductor and is electrically connected to another contact in described the 3rd pair of contact.

20, the reduction as claimed in claim 15 circuit of crosstalking, wherein said first conductor comprises that first insulation displacement contacts (IDC) and wherein said second conductor comprise the 2nd IDC.

21, the reduction as claimed in claim 20 circuit of crosstalking, a wherein said IDC has the first conductor receiving slit and the second conductor receiving slit, and the wherein said first and second conductor receiving slits are set to be in the same plane but conllinear not.

22, the reduction as claimed in claim 15 circuit of crosstalking, second magnetic field in described communications connectors the 3rd conductor near zone is offset in wherein said the 3rd magnetic field at least in part.

23, a kind of communications connectors comprises:

The passive coupling parts;

Near first conductor the first of described passive coupling parts; With

Near second conductor the second portion of described passive coupling parts;

The signal that wherein said passive coupling parts are set to be coupled and are inducted to first signal of described second conductor transmission by described first conductor, wherein said coupled signal is inducted on described second conductor in the opposite direction along the side with described first signal.

24, communications connectors as claimed in claim 23, wherein said passive coupling parts comprise a loop, and the first of wherein said passive coupling parts is positioned in the first in described loop and on the second portion relative substantially with described loop first that the second portion of described passive coupling parts is positioned at described loop.

25, communications connectors as claimed in claim 23, wherein said first and second conductors include an insulation displacement contacts (IDC), and the upper end of described IDC has first groove and lower end and has parallel with described first groove but second groove of conllinear not.

26, a kind of communications connectors comprises:

Be set to receive first contact and second contact of first differential signal;

Be set to receive the 3rd contact and the 4th contact of second differential signal; With

Be arranged on the passive coupling parts between described first and second contacts and third and fourth contact, wherein said passive coupling parts are set to receive to have first induced signal of first polarity and be set to from described first contact receive second induced signal with first polarity from described second contact.

27, communications connectors as claimed in claim 26, wherein said passive inductive means comprises parasitic conductive loops.

28, communications connectors as claimed in claim 27, wherein said parasitic conductive loops are set to from described first and second induced signals the 3rd signal of inducting in described the 3rd contact.

29, a kind of method that is used to reduce the differential cross-talk signal of inducting to the 3rd conductor of communications connectors from first pair of conductor comprising first conductor and second conductor, described method comprises:

The crosstalk signal of inducting from be transferred to the signal in the parasitic conductive loops first by described first conductor is offset by second magnetic field of transmission by the signal generation of described second conductor at least in part to produce around first magnetic field of described parasitic conductive loops second portion.

30, method as claimed in claim 29, wherein said first and second magnetic fields are offset near described the 3rd conductor each other at least in part.

31, a kind of cable link block comprises:

First binding post and second binding post of first row's binding post have been determined;

Determined to be basically parallel to the 3rd binding post and the 4th binding post that second of described first row's binding post is arranged binding post; With

Be set to the inductive couplings parts of inductive ground coupling energy from the signal that first binding post to the, four binding posts transmit.

32, cable link block as claimed in claim 31, wherein said inductive couplings parts comprise parasitic conductive loops.

33, cable link block as claimed in claim 31, wherein said inductive couplings parts comprise the signal transmission projection on described first binding post.

34, cable connecting system as claimed in claim 1, wherein said installation base plate comprises first installation base plate and second installation base plate, wherein said first pair of wire connection terminals is installed in described first installation base plate, and wherein said second pair of wire connection terminals is installed in described second installation base plate.