CN1049313C

CN1049313C - Low-crosstalk electrical signal transmitting medium

Info

Publication number: CN1049313C
Application number: CN95117599A
Authority: CN
Inventors: 刘文生
Original assignee: DENGQI ENTERPRISE Co Ltd
Current assignee: DENGQI ENTERPRISE Co Ltd
Priority date: 1995-12-06
Filing date: 1995-12-06
Publication date: 2000-02-09
Anticipated expiration: 2015-12-06
Also published as: CN1154021A

Abstract

The present invention relates to an electric signal transmitting medium which comprises a plurality of signal input ends, a plurality of signal output ends and a plurality of signal transmitting lines between the signal input ends and the signal output ends. A capacitive device is formed by that the signal transmitting lines are coiled and calculatedly extended, and are mutually and correspondingly arrayed in order to return the electric balance of the signal transmitting lines and further reduce the crosstalk among the signal transmitting lines.

Description

Low cross-talk signal of telecommunication transfer medium

The present invention relates to a kind of transfer medium, refer in particular to a kind of low crosstalk signal transfer medium.

When the signal of telecommunication of given frequency applied with pair of conductors, each conductor can send the different piece of signal energy to each right conductor of proximity conductor.First lead in the pair of conductors is adjacent electric capacity and the inductance coupling high between conductor, as and this conductor second lead is adjacent electric capacity between conductor and inductance coupling high not simultaneously, promptly produce so-called cross-talk phenomenon.The parameter that influences cross-talk has right signal frequency of the dielectric constant of material between the spacing of adjacent wires, lead and each signal etc.

In cable and junction block, because of the spacing of each lead is very little, aforementioned cross-talk phenomenon is very serious during use, especially when high transmission speed, may make communication quality can't make us accepting.Therefore, FCC (FCC) promptly adopts some design standards aspect the employed electric connector of communications industry, so that acceptable mutual matching to be provided.

The general business telecommunication element of being accepted and the main reference standard of equipment international standard are AN-SI/EIATIA-568 (TIA-568), and its auxiliary criteria then is TIA/EIA TSB40 (TSB40).In TSB40, do not twine for shielding fraud that connector defined passes a parameter and comprise decay and near-end crosstalk (NEXT) and return loss to (UTP).Maximum because of the cross-talk between the hop of approach signal source coupling, near-end (with respect to far-end) expression mode is the decibel value with frequency dependence.NETX loss value is bigger, and cross-talk usefulness is better.

In the past, the transmission conditions of the element of rank 3 need reach 16MHZ through indicating; 4 of ranks are required to reach 20MHZ.Nowadays, 5 need of rank reach 100MHZ.The existing multiple on the market at present part that meets rank 5 requirements, so need order dress or the new modification design of rebuilding puzzlements such as (retooling) especially because of existing, so the U.S. two tame TheSiemon Company of manufacturer and Superior Modular Products, Inc. promptly design the universal product respectively and get permission the U.S. the 5th respectively, 295, the 869 and the 5th, 299, No. 956 patents.After getting permission patent, it is counterfeit that this two tame manufacturer accuses that immediately other people carry out patent on market.China developed because of former less attention, so also be unable to escape the charge of this two tame manufacturers patent infringement.

Purpose of the present invention provides a kind of low cross-talk signal of telecommunication transfer medium that reaches rank 5 code requirements of novelty.

For achieving the above object, signal of telecommunication transfer medium of the present invention comprises a plurality of signal input parts, a plurality of signal output part and the corresponding respectively a plurality of signal transmssion lines that are connected electrically in therebetween.Wherein, all corresponding mutually arrangement so that reply the electric equilibrium of this signal transmssion line, reduces the cross-talk between signal transmssion line to form a capacitive device to each signal transmssion line around also having a mind to extend through folding.

In one preferred version, this transfer medium is the form of a printed circuit board (PCB).Respectively this signal transmssion line all has the branch line that extends in these printed circuit board (PCB) both sides, and corresponding.Each input or output are all the plated-through hole that penetrates printed circuit board (PCB).

In the another preferred version, each signal transmssion line includes first end near respective input, and near second end of corresponding output end.Wherein, this first and second end one of at least through folding around forming.

In the another preferred version, second pair of lead that the first pair of lead that these a plurality of signal transmssion lines comprise that first and second lead forms and the 3rd formed with privates.Wherein, two of second pair of lead leads split the both sides at first pair of lead; Corresponding to this input of this first pair of lead between first end and second end of this first pair of lead, and corresponding to this input and the output of this second pair of lead, then respectively at connecting this second pair of lead therebetween.

In the another preferred version, first end of this first lead and this privates is planted mutually around also having a mind to extend through folding respectively; First end of this second lead and these privates is planted mutually around also having a mind to extend through folding respectively; First end of this second lead and these privates is planted mutually around also having a mind to extend through folding respectively; And second end of this first lead and this privates is planted mutually around also having a mind to extend through folding respectively.

In the another preferred version, it is that two of separation extends line segment that this second end of this first or second lead comprises with its corresponding output; These first ends all comprise a U-shaped part, and these second ends then all comprise a plurality of mutual partly overlapping U-shaped parts.

The present invention can obtain further understanding from following description with reference to accompanying drawing.

Fig. 1 is the vertical view of the preferred embodiment of the low cross-talk signal of telecommunication transfer medium of the present invention;

Fig. 2 is the bottom circuit reverse view of the preferred embodiment of the low cross-talk signal of telecommunication transfer medium of the present invention; And

Fig. 3 is the test data figure of the low cross-talk signal of telecommunication transfer medium preferred embodiment of the present invention.

See also Fig. 1 and Fig. 2, demonstrate the front circuit 10 and the reverse side circuit 50 of the printed circuit board (PCB) of the low cross-talk signal of telecommunication transfer medium of the present invention.Shown in the circuit, include couple of conductor 5,4, another is to lead 7,8, another to lead 3,6 and couple of conductor 1,2, totally four pairs of leads again.Because of required circuit may not have four pairs, because of line principle is identical, so below only the application is described with couple of conductor 3,6 and couple of conductor 1,2 these two pairs of leads.

Low cross-talk signal of telecommunication transfer medium of the present invention comprises a plurality of

signal input part

3A, 6A, 1A, 2A (can comprise 5A, 4A, 7A and 8A in addition), a plurality of signal output part 3B, 6B, 1B, 2B (can comprise 5B, 4B, 7B and 8B in addition) and is connected electrically in a plurality of signal transmssion lines 3,6,1,2 (can comprise 5,4,7 and 8 in addition) between each input and the output respectively.All corresponding mutually arrangement is provided with to form a capacitive device each signal transmssion line 3,6,1,2 around also having a mind to extend through folding, so that reply the electric equilibrium of these signal transmssion lines, to reduce the cross-talk between signal transmssion line.Front circuit 10 and reverse side circuit 50 are printed on the both sides of printed circuit board (PCB) respectively, but then all use the both sides of plated-through hole UNICOM printed circuit board (PCB) at

input

3A, 6A, 1A, 2A, output 3B, 6B, 1B, 2B and plated-through hole C.The main purpose of plated-through hole C is to make each signal transmssion line 3,6,1,2 be distributed in the corresponding mutual UNICOM of branch line that splits of printed circuit board (PCB) both sides.

Signal transmssion line 3 (6,1 or 2) comprises front first end 31A (61A, 11A or 21A) that is distributed in front circuit 10 near input 3A (6A, 1A or 2A) and the reverse side first end 31B (61B, 11B or 21B) that is distributed in reverse side circuit 50, and the front second end 32A (62A or 12A) and the reverse side second end 32B (62B, 12B or 22B) that is distributed in reverse side circuit 50 that are distributed in front circuit 10 near corresponding output end 3B (6B, 1B or 2B).It should be noted that signal transmssion line 2 does not have positive second end.

Signal transmssion line 3,6 constitutes first pair of lead, and 1,2 of signal transmssion lines constitute second pair of lead, and signal transmssion line 1,2 is arranged on the both sides of first pair of lead.Should notice that

respective input

3A, 6A lay respectively between the

first end

31A, 61A (31B, 61B) and the second end 32A, the 62A (32B, 62B);

Respective input

1A, 2A and output 1B, 2B are then connecting signal transmssion line 1,2 respectively betwixt.

The first end 31A, 11 (31B, 11B) of first signal transmssion line 3 and the 3rd signal transmssion line comprise through folding around and have a mind to extend into the U-shaped part of mutual plant; The first end 61A, the 21A (61B, 21B) of secondary signal transmission line 6 and the 4th signal transmssion line 2 comprises the U-shaped part of planting mutually around also having a mind to extend through folding; The second end 31A, the 12A (32B, 12B) of the first news signal transmssion line 3 and the 3rd signal transmssion line 1 comprise a plurality of mutual partly overlapping U-shaped parts.

The second end 32A (62A) of first (two) signal transmssion line 3 (6) comprises with its corresponding output 3B (6B) being two extension line segment 32A1,32A2 (62A1,62A2) of separation.The positive and negative branch line that splits mutually as 61A and 61B or 11A and 11B, then all links with plated-through hole C.

The signal transfer medium of setting up in the above described manner; Carry out the NEXT test as an example of four pairs of leads example; Its results list is as follows: frequency signal to signal to signal to signal to signal to signal to MHz 1-2 1-3 1-4 2-3 2-4 3-41.0-92,963-83.786-94.874-88.818-86.279-88.1514.0-89.54-77.6-82. 873-77.309-73.625-80.8358.0-81.557-71.264-74.613-73.972-68.733-74.75410.0-81.559-69.931-73.147-72.615-66.92-71.3 3616.0-76.612-65.794-69.325-68.714-62.782-68.12220.0-75. 458-64.593-66.938-66.723-60.886-66.00325.0-71.45-62.367-64.903-64.26-58.95-63.92131.25-69.659-59.764-62.773-62.3 33-56.791-62.30562.50-57.462-54-55.288-56.396-50.928-55. 915100.00-49.766-50.09-49.805-52.622-46.644-51.243

Above-mentioned table result is drawn, can be got Fig. 3.From then on the cross-talk that can find signal transfer medium of the present invention among the figure is significantly less than the TSB40 standard.

Above-mentioned is the preferred embodiments of the present invention only, and protection scope of the present invention should be defined by the claims.

Claims

1. one kind low cross-talk signal of telecommunication transfer medium is characterized in that, comprising:

A plurality of signal input parts are used for input signal;

A plurality of signal transmssion lines are electrically connected respectively and follow these a plurality of signal input parts, and each signal transmssion line all through folding around and have a mind to extend and corresponding mutually the arrangement forming a capacitive device reduce cross-talk between the signal transmssion line so that reply the electric equilibrium of these signal transmssion lines; And

A plurality of signal output parts are electrically connected respectively and follow these signal transmssion lines, export for signal.

2. transfer medium as claimed in claim 1 is characterized in that, it is a printed circuit board (PCB) form.

3. transfer medium as claimed in claim 2 is characterized in that, each above-mentioned a plurality of signal transmssion line all is formed on the both sides of this printed circuit board (PCB).

4. transfer medium as claimed in claim 3 is characterized in that, respectively this signal transmssion line is located at these printed circuit board (PCB) both sides and corresponding respectively respectively.

5. transfer medium as claimed in claim 3 is characterized in that respectively this input or output all penetrate this printed circuit board (PCB).

6. transfer medium as claimed in claim 5 is characterized in that, respectively this signal transmssion line include near first end of respective input with near second end that mutually should output, this first and second end wherein one of at least through folding around and have a mind to extension.

7. transfer medium as claimed in claim 6 is characterized in that, second pair of lead that the first pair of lead that these a plurality of signal transmssion lines comprise that first and second lead forms and the 3rd formed with privates.

8. transfer medium as claimed in claim 7 is characterized in that, two leads of second pair of lead are separately positioned on the both sides of first pair of lead.

9. transfer medium as claimed in claim 6 is characterized in that, corresponding to this input of this first pair of lead between first end and second end of this first pair of lead; And this input and the output of this second pair of lead of corresponding what are then connecting this second pair of lead respectively betwixt.

10. transfer medium as claimed in claim 9 is characterized in that, first end of this first lead and this privates is planted mutually around also having a mind to extend through folding respectively; First end of this second lead and these privates is planted mutually around also having a mind to extend through folding respectively; And first end of this first lead and this privates is planted mutually around also having a mind to extend through folding respectively.

11. transfer medium as claimed in claim 10 is characterized in that, this second end of this first lead comprises that this output with its correspondence is that two of separation extends line segment.

12. transfer medium as claimed in claim 10 is characterized in that, these first ends include a U-shaped part.

13. transfer medium as claimed in claim 10 is characterized in that, these second ends all comprise a plurality of U-shaped parts of overlapping each other.

14. transfer medium as claimed in claim 10 is characterized in that, it is that two of separation extends line segment that this second end of this second lead comprises with its corresponding this output.