CN1154021A - Low-crosstalk electrical signal transmitting medium - Google Patents
Low-crosstalk electrical signal transmitting medium Download PDFInfo
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- CN1154021A CN1154021A CN 95117599 CN95117599A CN1154021A CN 1154021 A CN1154021 A CN 1154021A CN 95117599 CN95117599 CN 95117599 CN 95117599 A CN95117599 A CN 95117599A CN 1154021 A CN1154021 A CN 1154021A
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- lead
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- transmission media
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- signal transmission
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- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
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Abstract
The electrical signal transmitting medium includes several signal inputs, several signal outputs and several signal transmitting lines in between. The tortuous signal transmitting lines are elongated and properly arranged to form a capacitive unit, which restores the electrical balance in signal transmitting lines and thus decrease crosstalk between signal transmitting lines.
Description
The present invention relates to one and transmit media, You Zhiyi is low, and the cross-talk signal transmits media.
When the electric signal of given frequency was executed the what pair of conductors, each conductor can send the part that do not wait 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 (jack), because of the spacing of each lead is very little, the aforementioned cross-talk phenomenon of user is very serious, especially when high transmission speed, may make communication quality can't make us accepting.Therefore, FCC (FCC) the employed electric connector of what communications industry aspect promptly adopts some design standards, so that acceptable mutual matching (intermatability) to be provided.
The main reference standard of general business telecommunication element of accepting and equipment international standard is ANSI/EIATIA-568 (TIA-568), and its auxiliary criteria then is TIA/EIA TSB40 (TSB40).In TSB40 for protection not twine to (un-shielded twisted pair, UTP) connector defined pass a parameter comprise decay and near-end crosstalk (near-end crosstalk, NEXT) and return loss.Maximum because of being coupled near the cross-talk between the hop of signal source, near-end (what far-end relatively) expression mode is according to frequency (frequency dependent) decibel value.NEXT loss value is bigger, and cross-talk usefulness is better.
In the past, the transmission important document of classification 3 (category 3) element need reach 16MHZ through indicating; 4 of classifications are required to reach 20MHZ.Nowadays, 5 of classifications are required to reach 100MHZ.The existing multiple on the market at present part that meets classification 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 The Siemon Company of manufacturer and Superior Modular Prod-ucts, Inc. promptly design the universal product respectively and get permission the U.S. the 5th respectively, 295, the 5th, 299, No. 956 patents of 869 usefulness.After getting permission patent, this two tame manufacturer carries out the counterfeit charge of patent on the what market immediately without restraint.China develops because of previous 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-crosstalk electrical signal transmitting medium that reaches classification 5 code requirements of novelty.
For achieving the above object, electric signal of the present invention transmits media, comprises a plurality of signal input ends, a plurality of signal output end and the corresponding respectively what a plurality of signal transmission lines therebetween that are electrically connected.Wherein, respectively all mutual correspondence is arranged setting to form a capacitive device to this signal transmission line around also painstakingly extending through folding, so that reply the electric equilibrium of this signal transmission line, to reduce the cross-talk between signal transmission line.
In one preferred version, this transmission media is the form of a printed circuit board (PCB).Respectively this signal transmission line all has the branch line that extends these printed circuit board (PCB) both sides of what, and corresponding.Each input or output are all the filling Copper Foil perforation that penetrates printed circuit board (PCB).
In the another preferred version, each signal transmission line all comprises first end near corresponding input, and second end of approaching corresponding output.Wherein, at least one of this first and second end through the folding around.
In the another preferred version, second pair of lead that the first pair of lead that these a plurality of signal transmission lines comprise that first and second lead forms and the 3rd formed with privates.Wherein, two leads of second pair of lead split the both sides of first pair of lead of what; Between first end and second end of this input position this first pair of lead of what of corresponding this first pair of lead of what, and this input and the output of this second pair of lead of corresponding what, then what connects this second pair of lead therebetween respectively.
In the another preferred version, first end of this first lead and this privates is established protruding put around also painstakingly extending mutually through folding respectively; First end of this second lead and these privates is established protruding put around also painstakingly extending mutually through folding respectively; First end of this second lead and these privates is established protruding put around also having a mind to extend mutually through folding respectively; And second end of this first lead and this privates is established protruding put around also painstakingly extending mutually 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 low-crosstalk electrical signal transmitting medium of the present invention;
Fig. 2 is the bottom circuit reverse view of the preferred embodiment of low-crosstalk electrical signal transmitting medium of the present invention; And
Fig. 3 is the test data figure of low-crosstalk electrical signal transmitting medium preferred embodiment of the present invention.
See also Fig. 1 and Fig. 2, demonstrate the form that low-crosstalk electrical signal transmitting medium of the present invention is the front circuit 10 and the reverse side circuit 50 of a printed circuit board (PCB).Shown in the circuit, include lead 5,4 a pair of, lead 7,8 a pair of, lead 3,6 a pair of and lead 1,2 a pair of totally four pairs of leads.Because of required circuit must not reach four pairs, and because of line principle is identical, thus below only with lead 3,6 a pair of and lead 1,2 a pair of these two pairs of leads as the application's explanation.
Low-crosstalk electrical signal transmitting medium of the present invention comprises a plurality of signal input end 3A, 6A, 1A, 2A (can comprise 5A, 4A, 7A and 8A in addition), a plurality of signal output end 3B, 6B, 1B, 2B, (can comprise 5B, 4B, 7B and 8B in addition) and is electrically connected a plurality of signal transmission lines 3,6,1,2 (can comprise 5,4,7 and 8 in addition) between each input of what and output respectively.All mutual correspondence is arranged setting to form a capacitive device to each signal transmission line 3,6,1,2 around also painstakingly extending through folding, so that reply the electric equilibrium of these signal transmission lines, to reduce the cross-talk between signal transmission line.The both sides that front circuit 10 and reverse side circuit 50 print the what printed circuit board (PCB) respectively, but what input 3A, 6A, 1A, 2A, output 3B, 6B, 1B, 2B and a C that communicates are then all with the both sides of Copper Foil conducting printed circuit board (PCB).The main purpose of a C of communicating is the corresponding isolated branch line mutual conduction that makes each signal transmission line 3,6,1,2 distribution what printed circuit board (PCB) both sides.
Signal transmission line 3 (6,1 or 2) comprises the front first end 31A (61A, 11A or 21A) of the distribution what front circuit 10 near input 3A (6A, 1A or 2A) and the reverse side first end 31B (61B, 11B or 21B) of distribution what reverse side circuit 50, and near corresponding output 3B (6B, 1B or 2B) and the reverse side second end 32B (62B, 12B or 22B) of the front second end 32A (62A or 12A) of distribution what front circuit 10 and distribution what reverse side circuit 50.It should be noted that signal transmission line 2 does not possess positive second end.
The first end 31A, 11 (31B, 11B) of first signal transmission line 3 and the 3rd signal transmission line comprise through folding around and painstakingly extend and establish protruding U-shaped part of putting mutually; The first end 61A, the 21A (61B, 21B) of second signal transmission line 6 and the 4th signal transmission line 2 comprise through folding around and painstakingly extend and establish protruding U-shaped part of putting mutually; The second end 31A, the 12A (32B, 12B) of first signal transmission line 3 and the 3rd signal transmission line 1 then all comprises a plurality of mutual partly overlapping U-shaped parts.
It is that two of separation extends line segment 32A1,32A2 (62A1,62A2) that the second end 32A (62A) of first (two) the news thing transmission line 3 (6) comprises with its corresponding output 3B (6B).Gu Li positive and negative branch line as 61A and 61B or 11A and 11B, then all is conducted with a C that communicates mutually.
The signal of setting up in the above described manner transmits media; Carry out the NEXT test as an example of four pairs of leads example; Its results list is as follows: frenquency 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 standard that can find signal transmission media of the present invention among the figure is good far beyond the claimer of TSB40 institute.
Be the present invention's preferred embodiment upward, and protection scope of the present invention should be limited by claims.
Claims (14)
1. a low-crosstalk electrical signal transmitting medium is characterized in that, comprising:
The input of a plurality of signal input ends for signal;
A plurality of signal transmission lines are electrically connected these a plurality of signal input ends of what respectively, and each signal transmission line all through folding around and painstakingly extend and corresponding mutually the arrangement is provided with forming a capacitive device so that the electric equilibrium of replying these signal transmission lines is to reduce the cross-talk between signal transmission line; And
A plurality of signal output ends are electrically connected these signal transmission lines of what respectively, export for signal.
2. transmission media as claimed in claim 1 is characterized in that, it is a printed circuit board (PCB) form.
3. transmission media as claimed in claim 2 is characterized in that, each above-mentioned a plurality of signal transmission line all forms the both sides of this printed circuit board (PCB) of what.
4. transmission media as claimed in claim 3 is characterized in that, respectively this signal transmission line is established these printed circuit board (PCB) both sides of what and all corresponding respectively.
5. transmission media as claimed in claim 3 is characterized in that respectively this input or output all penetrate this printed circuit board (PCB).
6. transmission media as claimed in claim 5 is characterized in that, respectively this signal transmission line all comprises near first end of corresponding input and second end near corresponding this output, wherein at least one of this first and two end through folding around and painstakingly extension.
7. transmission media 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 transmission lines comprise that first and second lead forms and the 3rd formed with privates.
8. transmission media as claimed in claim 7 is characterized in that two leads of second pair of lead are provided with the both sides of first pair of lead of what respectively.
9. transmission media as claimed in claim 6 is characterized in that, between first end and second end of this input position this first pair of lead of what of this first pair of lead of corresponding what; And this input and the output of this second pair of lead of corresponding what, then what connects this second pair of lead therebetween respectively.
10. transmission media as claimed in claim 9 is characterized in that, first end of this first lead and this privates is established protruding put around also painstakingly extending mutually through folding respectively; First end of this second lead and these privates is established protruding put around also painstakingly extending mutually through folding respectively; And first end of this first lead and this privates is established protruding put around also painstakingly extending mutually through folding respectively.
11. transmission media as claimed in claim 10 is characterized in that, it is that two of separation extends line segment that this second end of this first lead comprises with its corresponding this output.
12. transmission media as claimed in claim 10 is characterized in that, these first ends all comprise a U-shaped part.
13. transmission media 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. transmission media 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95117599A CN1049313C (en) | 1995-12-06 | 1995-12-06 | Low-crosstalk electrical signal transmitting medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95117599A CN1049313C (en) | 1995-12-06 | 1995-12-06 | Low-crosstalk electrical signal transmitting medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1154021A true CN1154021A (en) | 1997-07-09 |
| CN1049313C CN1049313C (en) | 2000-02-09 |
Family
ID=5081307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95117599A Expired - Lifetime CN1049313C (en) | 1995-12-06 | 1995-12-06 | Low-crosstalk electrical signal transmitting medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1049313C (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5299956B1 (en) * | 1992-03-23 | 1995-10-24 | Superior Modular Prod Inc | Low cross talk electrical connector system |
| US5295869A (en) * | 1992-12-18 | 1994-03-22 | The Siemon Company | Electrically balanced connector assembly |
-
1995
- 1995-12-06 CN CN95117599A patent/CN1049313C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CN1049313C (en) | 2000-02-09 |
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