CN2777713Y - Leakage coaxial cable - Google Patents
Leakage coaxial cable Download PDFInfo
- Publication number
- CN2777713Y CN2777713Y CN 200520002227 CN200520002227U CN2777713Y CN 2777713 Y CN2777713 Y CN 2777713Y CN 200520002227 CN200520002227 CN 200520002227 CN 200520002227 U CN200520002227 U CN 200520002227U CN 2777713 Y CN2777713 Y CN 2777713Y
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- China
- Prior art keywords
- coaxial cable
- shape
- leaky coaxial
- outer conductor
- slotted eye
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- Expired - Lifetime
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Abstract
The utility model provides a leakage coaxial cable. The utility model comprises an internal conductor positioned in the center of the leakage coaxial cable, an insulating layer extruded and coated outside the internal conductor, an external conductor covered outside the insulating layer, a wrapping layer wrapped outside the external conductor, and an external protection sleeve extruded and coated outside the wrapping layer, wherein the external conductor is provided with wireless transmission signal leakage slot holes. The leakage slot holes can be in a reversed L shape, a T shape or an H shape, or the combination of the reversed L shape, the T shape and the H shape, and the leakage slot holes can have different dimensional proportions. By changing the combination of different structure shapes, different dimensional proportions and different arrangement intervals of each leakage slot hole, when the utility model is used in the wireless electric signal transmission, the sum of the coupling loss during the transmission process and the longitudinal transmission attenuation, which is the system loss, is smaller in the prescribed frequency range, and the wireless blind area coverage in a long distance is achieved.
Description
Technical field
The utility model relates to signal-transmitting cable, particularly a kind of leaky coaxial cable.
Background technology
Leaky coaxial cable is a kind of opening transmission line that can be used for the signal transmission, it is by the control of external conductor openings, controlled electromagnetic wave energy road along the line can be radiate equably and receives into, improve the coverage of radio wave thus, eliminate transmission blind spot.Leaky coaxial cable is mainly used in the environment that general communication antenna is difficult to play a role, as zones such as mountain area, tunnel, tunnel, subterranean railway, hypogees.
Leaky coaxial cable generally comprises inner wire, insulating barrier, outer conductor, lapping layer and oversheath five parts from inside to outside.The version of outer conductor has determined the performance of sewing of cable.Wherein slotted hole structure is one of key factor of decision leaky coaxial cable performance index.
Existing leaky coaxial cable has multiple outer conductor version, wherein be typically two kinds of outer conductor versions, a kind of is two Eight characters groove outer conductor structure leaky coaxial cables, and its outer conductor adopts towards the vertical bag of the copper strips that two Eight characters slotted eyes are arranged and forms, and its structural representation is shown in Fig. 1 (a).The shortcoming of two Eight characters slot leakage coaxial cables is that it uses frequency range lower, generally is only applicable to 450MHz and following frequency range.If frequency of utilization when 450MHz is above, then produces bigger cable transmission decay, transmission range is shortened, therefore can not satisfy the requirement that high frequency uses frequency range.
Another kind is an embossing groove milling outer conductor structure leaky coaxial cable, and its structural representation is shown in Fig. 1 (b).Outer conductor embossing groove milling fabric drain cable belongs to broadband and leaks cable, and it uses frequency range wide, but because its transmission attenuation in use and coupling loss sum are that system loss is bigger, the wireless blind area signal that therefore is not suitable for long distance covers.
This shows that existing leaky coaxial cable is subjected to the restriction of its outer conductor structure, its performance index can not satisfy the requirements at the higher level that the signal transmission system development proposes the cable transmission characteristic.
Content of the present utility model
At above-mentioned the deficiencies in the prior art, the purpose of this utility model is to provide a kind of leaky coaxial cable with novel outer conductor version, comprising: the inner wire that is positioned at the leaky coaxial cable center; Be coated on the outer insulating barrier of this inner wire; Be arranged on the outer outer conductor of this insulating barrier; Be coated on the outer lapping layer of this outer conductor; And be coated on the outer oversheath of this lapping layer, wherein, described outer conductor has at least one and sews slotted eye, and the described slotted eye of sewing comprises along axially extended first of described outer conductor and the second portion that extends to form at a predetermined angle at least one end of described first.Wherein, the shape of sewing slotted eye that is arranged on the outer conductor is preferably " Γ " shape, "T"-shaped or " worker " shape, and arranges at certain intervals along the axis direction of cable.
Utilize the utility model, according under the different frequencies of utilization to the instructions for use difference of leaky coaxial cable, can be by changing the combination that each is sewed slotted eye different structure shape, reaches different arrangement pitches, make coupling loss in the transmission course with vertical transmission attenuation sum, be that system loss is less in the regulation frequency range, cover with the wireless blind area of realizing long distance.
Followingly specific embodiments of the present utility model is made a detailed description with reference to accompanying drawing.
Description of drawings
Fig. 1 (a) sews the coaxial cable structure schematic diagram for the two Eight characters groove structures of existing outer conductor;
Fig. 1 (b) sews the coaxial cable structure schematic diagram for existing outer conductor embossing groove milling structure;
Fig. 2 is according to leaky coaxial cable generalized section of the present utility model;
Fig. 3 is the leaky coaxial cable structural representation according to first embodiment of the present utility model;
Fig. 4 is the leaky coaxial cable outer conductor slotted hole structure schematic diagram according to second embodiment of the present utility model;
Fig. 5 is the leaky coaxial cable outer conductor slotted hole structure schematic diagram according to the 3rd embodiment of the present utility model;
Fig. 6 is the leaky coaxial cable outer conductor slotted hole structure schematic diagram according to the 4th embodiment of the present utility model;
Fig. 7 is the leaky coaxial cable outer conductor slotted hole structure schematic diagram according to the 5th embodiment of the present utility model;
Fig. 8 is the leaky coaxial cable outer conductor slotted hole structure schematic diagram according to the 6th embodiment of the present utility model;
Fig. 9 is to be the leaky coaxial cable outer conductor slotted hole structure size schematic diagram shown in the example with the utility model first embodiment.
Embodiment
Shown in Figure 2 is leaky coaxial cable generalized section of the present utility model.As shown in the figure, this cable comprises from the inside to the outside successively: the inner wire 1 that is positioned at the leaky coaxial cable center; Extrude the insulating barrier 2 on inner wire 1, this insulating barrier 2 is formed by for example physical blowing polyethylene; Be coated on the outer outer conductor 3 of insulating barrier 2, this outer conductor 3 is for containing the band of sheet metal, and it is provided with wireless signal transmission and sews the slotted eye (not shown); Wrapped lapping layer 4 outside outer conductor 3; Extrude the oversheath 5 outside lapping layer 4.Each part mentioned above all forms with conventional material.
In order to reduce the transmission attenuation of cable when the transmitting high-frequency signal, increase wireless blind area coverage distance, the utility model proposes the brand-new slotted hole structure of sewing of outer conductor.This slotted eye of sewing comprises along axially extended first of described outer conductor and the second portion that extends to form at a predetermined angle at least one end of described first, thereby can form the shape of " Γ " shape, "T"-shaped or " worker " shape.And, by changing the direction of slotted eye, change is to the combination of different directions, difformity slotted eye, change the physical dimension of grooved, change the spacing of adjacent slotted eye and above-mentioned change is made up, can realize satisfying under different frequency of utilization situations requirement leaky coaxial cable different performance index.
As mentioned above, the above-mentioned slotted eye of sewing can have different planforms.For example, sew left end that the slotted eye second portion can be positioned at first or/and right-hand member, and can become the direction of predetermined angular (for example vertical or acutangulate) upwards or/and downward extension with long limit along first.
Below describe specific embodiments of the present utility model in detail.
Fig. 3 is the leaky coaxial cable structural representation according to first embodiment of the present utility model.As shown in the figure, outer conductor 3 is provided with " Γ " shape and sews slotted eye 6.Should " Γ " shape comprise first 61, be preferably a long rectangular channel, and an end of this first 61 along with its vertical extended up or down second portion 62 of direction in long limit, be preferably one and lack rectangular channel.Each " Γ " shape is sewed slotted eye and is arranged at certain intervals along the axis direction of cable in the long limit of first 61 mode parallel with cable axis.Be positioned at first's 61 right-hand members and upwardly extending " Γ " shape slotted eye is first " Γ " shape slotted eye with second portion shown in Fig. 3 62, the second portion 62 of second " Γ " shape slotted eye that then is adjacent is positioned at first's 61 right-hand members and for extending downwards.With described first and second " Γ " shape slotted eye is a unit, thereafter the 3rd, the planform and the arrangement mode of the fourth class " Γ " shape slotted eye be the repetition of this unit.
When adopting above-mentioned " Γ " shape slotted eye, those skilled in the art can be according to user demand, adopts conventional method to determine parameters such as the different size ratio of each " Γ " shape slotted eye on the outer conductor and arrangement pitch thereof.For example, can use the different of pairing electromagnetic wavelength of frequency range and wireless blind area coverage distance according to diameter, the cable of product specification, and select combination according to leaky coaxial cable outer conductor slotted hole structure size of the present utility model and arrangement pitch.As shown in Figure 9, these physical dimensions and arrangement pitch can comprise:
The length L 1 on the long rectangle flute length limit of first " Γ " type structure slotted eye;
The length B1 of the long rectangular channel minor face of first " Γ " type structure slotted eye;
The short rectangular channel part of first " Γ " type structure slotted eye is along the length L 2 of cable axis direction;
The short rectangular channel part of first " Γ " type structure slotted eye is perpendicular to the extended length B2 of long rectangular channel;
The length L 5 on the long rectangle flute length limit of second " Γ " type structure slotted eye;
The length B3 of the long rectangular channel minor face of second " Γ " type structure slotted eye;
The short rectangular channel part of second " Γ " type structure slotted eye is along the length L 4 of cable axis direction;
The short rectangular channel part of second " Γ " type structure slotted eye is perpendicular to the extended length B4 of long rectangular channel;
The arrangement pitch L3 of first and second " Γ " type structure slotted eye;
The unit that first and second " Γ " type structure slotted eye is formed and the arrangement pitch L6 of follow-up unit.
Leaky coaxial cable with the 50-42 specification is an example, use the leaky coaxial cable of the utility model first embodiment, when the signal of transmission 900MHz, compare with the leaky coaxial cable of the two Eight characters groove structures of the employing of routine, system loss reduces to be approximately the 15dB/ kilometer, and transmission range has more 400 meters approximately.
Leaky coaxial cable with the 50-32 specification is an example, use the leaky coaxial cable of the utility model first embodiment, when the signal of transmission 900MHz, compare with the leaky coaxial cable of the employing outer conductor embossing groove milling structure of routine, system loss reduces to be approximately the 14dB/ kilometer, and transmission range has more 300 meters approximately.
Shown in Fig. 4 is the leaky coaxial cable outer conductor slotted hole structure schematic diagram of second embodiment of the present utility model.Different with first embodiment, it is to be positioned at first's 61 right-hand members and upwardly extending " Γ " shape slotted eye is first " Γ " shape slotted eye with second portion 62 that " Γ " shape in the present embodiment is sewed slotted eye 6, and the second portion 62 of second " Γ " shape slotted eye that is adjacent is positioned at first's 61 left ends and for extending upward.
Adopt the leaky coaxial cable after this second embodiment also can obtain and the first embodiment similar effects.
Shown in Fig. 5 is the leaky coaxial cable outer conductor slotted hole structure schematic diagram of the 3rd embodiment of the present utility model.What the present embodiment was different with first and second embodiments is structure and the compound mode that " Γ " shape is sewed slotted eye 6.Be positioned at first's 61 right-hand members and upwardly extending " Γ " shape slotted eye is first " Γ " shape slotted eye with second portion 62 shown in scheming, the second portion 62 of second " Γ " shape slotted eye that is adjacent is positioned at first's 61 right-hand members and for extending upward.
Adopt the leaky coaxial cable after the 3rd embodiment also can obtain and the first embodiment similar effects.
Shown in Fig. 6 is the leaky coaxial cable outer conductor slotted hole structure schematic diagram of the 4th embodiment of the present utility model.What the present embodiment was different with above-mentioned three kinds of embodiments is that the slotted eye 6 of sewing that is provided with on outer conductor 3 is shaped as "T"-shaped.In the present embodiment, second portion 62 extends along the direction vertical with long limit simultaneously up and down at an end of first 61.The "T"-shaped slotted eye that is positioned at first's 61 right-hand members with second portion shown in Fig. 6 62 is the first "T"-shaped slotted eye, and the second portion 62 of the second "T"-shaped slotted eye that then is adjacent is positioned at first's 61 left ends.With the described first and second "T"-shaped slotted eyes is a unit, thereafter the 3rd, the planform and the arrangement mode of the "T"-shaped slotted eye of the fourth class be the repetition of this unit.
Adopt the leaky coaxial cable after the 4th embodiment also can obtain and the first embodiment similar effects.
Shown in Fig. 7 is the leaky coaxial cable outer conductor slotted hole structure schematic diagram of the 5th embodiment of the present utility model.What the present embodiment was different with the 4th embodiment is that the "T"-shaped slotted eye 6 of sewing has adopted different structures and compound mode.The "T"-shaped slotted eye that is positioned at first's 61 right-hand members with second portion shown in Fig. 6 62 is the first "T"-shaped slotted eye, and the second portion 62 of the second "T"-shaped slotted eye that then is adjacent also is positioned at first's 61 right-hand members.
Adopt the leaky coaxial cable after the 5th embodiment also can obtain and the first embodiment similar effects.
Shown in Fig. 8 is the leaky coaxial cable outer conductor slotted hole structure schematic diagram of the 6th embodiment of the present utility model.What the present embodiment was different with above-mentioned five kinds of embodiments is that the slotted eye 6 of sewing that is provided with on outer conductor 3 is " worker " font.In the present embodiment, second portion 62 extends along the direction vertical with long limit respectively simultaneously up and down at the two ends of first 61.
Adopt the leaky coaxial cable after the 6th embodiment also can obtain and the first embodiment similar effects.
As mentioned above, according to leaky coaxial cable described in the utility model, be applicable in various radio signals propagation bad environment and carry out radio signal transmission, it can satisfy under the different frequency of utilization situations different performance index request to leaky coaxial cable, when high frequency uses, can reduce transmission attenuation, increase wireless blind area coverage distance.
Obviously, above-mentioned is not to be to qualification of the present utility model about several embodiments of the present utility model.For example, although above-mentioned embodiment all is all to be that rectangular channel is that example illustrates with described first 61 and second portion 62 of sewing slotted eye 6, elongated slot and the short groove shape sewed in the slotted eye in the utility model obviously are not limited thereto.Those skilled in the art can carry out suitable selection and optimization to the shape of slotted eye according to the requirement of concrete frequency range needs and performance index.In addition, the unit combination mode in the above-mentioned embodiment only is exemplary, and those skilled in the art can be according to using needs that above-mentioned each planform is carried out any possible combination.
For example, although the above embodiments are to be that example illustrates with the slotted eye that only forms a kind of shape on outer conductor.But, on an outer conductor, obviously can comprise the combination of " Γ " shape, "T"-shaped and three kinds of shapes of " worker " shape; It also can be the wherein combination of any two slotted eyes.The shape of elongated slot (first) and short groove (second portion) need not be rectangular channel, also can be elliptical slot.Have, for the convenience of processing technology, the right angle part of all rectangle slotted eyes can be processed into the transition of slick and sly angle again.Also not necessarily must be vertical mutually between two parts, and an angle can be arranged.According to the concrete frequency range needs and the requirement of performance index, can carry out suitable selection and optimization to this angle, this is obviously and easily to realize for those skilled in the art.
Have, it will be understood by those skilled in the art that the difference of sewing slotted eye 6 shapes according to selected, its size setting also correspondingly is provided with different with size shown in Figure 9.
Therefore, any variation and change that does not break away from the utility model essence all should be within protection range of the present utility model.Protection range of the present utility model limits with appended claims.
Claims (8)
1. leaky coaxial cable comprises:
Be positioned at the inner wire (1) at leaky coaxial cable center;
Be coated on the outer insulating barrier (2) of inner wire (1);
Be arranged on the outer outer conductor (3) of insulating barrier (2);
Be coated on the outer lapping layer (4) of described outer conductor (3); And
Be coated on the outer oversheath (5) of described lapping layer (4),
It is characterized in that, described outer conductor (3) has a plurality of slotted eyes (6) of sewing, and the described slotted eye (6) of sewing comprises along axially extended first of described outer conductor (61) and the second portion (62) that extends to form at a predetermined angle at least one end of described first (61).
2. leaky coaxial cable according to claim 1 is characterized in that described predetermined angular is right angle or acute angle.
3. leaky coaxial cable according to claim 1 is characterized in that described first (61) and second portion (62) form " Γ " shape, "T"-shaped or " worker " shape.
4. according to each described leaky coaxial cable of claim 1-3, it is characterized in that described first (61) and second portion (62) are rectangle or ellipse.
5. according to each described leaky coaxial cable of claim 1-3, it is characterized in that described first (61) and second portion (62) are rectangle, and the square of described rectangle becomes slick and sly transition angle.
6. according to each described leaky coaxial cable of claim 1-3, each the described slotted eye (6) of sewing that it is characterized in that being arranged on the described outer conductor (3) is the combination of difformity, different size ratio and different arrangement pitches.
7. leaky coaxial cable according to claim 4, each the described slotted eye (6) of sewing that it is characterized in that being arranged on the described outer conductor (3) is the combination of difformity, different size ratio and different arrangement pitches.
8. leaky coaxial cable according to claim 5, each the described slotted eye (6) of sewing that it is characterized in that being arranged on the described outer conductor (3) is the combination of difformity, different size ratio and different arrangement pitches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520002227 CN2777713Y (en) | 2005-01-07 | 2005-02-05 | Leakage coaxial cable |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200520000508.8 | 2005-01-07 | ||
| CN200520000508 | 2005-01-07 | ||
| CN 200520002227 CN2777713Y (en) | 2005-01-07 | 2005-02-05 | Leakage coaxial cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2777713Y true CN2777713Y (en) | 2006-05-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520002227 Expired - Lifetime CN2777713Y (en) | 2005-01-07 | 2005-02-05 | Leakage coaxial cable |
Country Status (1)
| Country | Link |
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| CN (1) | CN2777713Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1974289B (en) * | 2006-12-28 | 2011-01-19 | 北京交通大学 | Leakage coaxle with E-shaped radiation grooves external conductor and its making process |
| CN102013540A (en) * | 2010-12-10 | 2011-04-13 | 北京交通大学 | Leaky coaxial cable for radiating circular polarization waves in circumferential 260 DEG range |
| CN101404349B (en) * | 2008-11-14 | 2012-08-22 | 中天日立射频电缆有限公司 | Short pitch alternation mixed trenching radiation type leak coaxial cable |
| CN104575809A (en) * | 2014-10-11 | 2015-04-29 | 芜湖扬宇机电技术开发有限公司 | Leaky cable with built-in RFID (radio frequency identification) tags |
| CN106848521A (en) * | 2017-02-24 | 2017-06-13 | 通号（郑州）轨道交通科技有限公司 | A kind of dual polarization leaky waveguide |
| CN107799858A (en) * | 2016-08-31 | 2018-03-13 | 中天射频电缆有限公司 | Sheath and the leaky cable using the sheath |
| CN109066033A (en) * | 2018-07-30 | 2018-12-21 | 中天射频电缆有限公司 | A kind of longitudinal wrap type flexible waveguide leakage cable |
-
2005
- 2005-02-05 CN CN 200520002227 patent/CN2777713Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1974289B (en) * | 2006-12-28 | 2011-01-19 | 北京交通大学 | Leakage coaxle with E-shaped radiation grooves external conductor and its making process |
| CN101404349B (en) * | 2008-11-14 | 2012-08-22 | 中天日立射频电缆有限公司 | Short pitch alternation mixed trenching radiation type leak coaxial cable |
| CN102013540A (en) * | 2010-12-10 | 2011-04-13 | 北京交通大学 | Leaky coaxial cable for radiating circular polarization waves in circumferential 260 DEG range |
| CN102013540B (en) * | 2010-12-10 | 2013-01-23 | 北京交通大学 | Leaky coaxial cable for radiating circular polarization waves in circumferential 260 DEG range |
| CN104575809A (en) * | 2014-10-11 | 2015-04-29 | 芜湖扬宇机电技术开发有限公司 | Leaky cable with built-in RFID (radio frequency identification) tags |
| CN107799858A (en) * | 2016-08-31 | 2018-03-13 | 中天射频电缆有限公司 | Sheath and the leaky cable using the sheath |
| CN106848521A (en) * | 2017-02-24 | 2017-06-13 | 通号（郑州）轨道交通科技有限公司 | A kind of dual polarization leaky waveguide |
| CN109066033A (en) * | 2018-07-30 | 2018-12-21 | 中天射频电缆有限公司 | A kind of longitudinal wrap type flexible waveguide leakage cable |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: JIAOZUO RAILWAY CABLE CO., LTD. Free format text: FORMER NAME: JIAOZUO RAILWAY CABLE FACTORY |
|
| CP03 | Change of name, title or address |
Address after: 454001 No. 8, front road, Jiaozuo, Henan Patentee after: JIAOZUO RAILWAY CABLE CO., LTD. Address before: 454000 No. 8, front road, Jiaozuo, Henan Patentee before: Jiaozuo Railway Cable Factory |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150205 Granted publication date: 20060503 |