CN201622374U - Optical cable for wireless remote RF unit - Google Patents
Optical cable for wireless remote RF unit Download PDFInfo
- Publication number
- CN201622374U CN201622374U CN2009202437169U CN200920243716U CN201622374U CN 201622374 U CN201622374 U CN 201622374U CN 2009202437169 U CN2009202437169 U CN 2009202437169U CN 200920243716 U CN200920243716 U CN 200920243716U CN 201622374 U CN201622374 U CN 201622374U
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- optical cable
- extension unit
- steel band
- less radio
- frequency extension
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Abstract
An optical cable for a wireless remote RF unit is characterized in that a tight tube fiber serves as a transmission medium in a center loose tube filled with a non-oil filling material; and a steel strip coating layer and a flame-retardant outer sheath structure layer are disposed outside the center tube. According to the requirement, a nonmetallic material reinforced structure layer is further arranged between the center loose tube and the steel strip coating layer. The remote cable has the advantages of small external diameter, light weight, easy laying, high mechanical performance, and high resistance to rat bite, lightning strike, bird damage and gunshot, and is suitable for large-temperature-difference condition and indoor environment/outdoor environment. Accordingly, the optical cable for a wireless remote RF unit can meet the requirement for wireless communication mobile base station and the remote cables between antennas, and is easy to manufacture the special wireless remote RF fiber connectors by the fiber connector manufacturers due to the adoption of the tight tube fiber as the transmission medium.
Description
Technical field
The utility model relates to a kind of transmission cable structure applicable to less radio-frequency extension unit (RRU) usefulness.
Background technology
Less radio-frequency zooms out being connected of optical fiber transmission line between machine room that optical cable is mainly used in communication base station and antenna for base station, and the core number is generally two cores.Usually use is zoomed out optical cable and is made special plug/unplug connector at present, and the transmission medium that therefore requires to zoom out optical cable adopts tight tube fiber.And generally be to be applied in the indoor environment with tight tube fiber as the cable configuration design of transmission medium at present, use it for outdoor environment, particularly,, can cause the additional attenuation of transmission signals because of lacking necessary anti-contraction elements in the cable configuration at environment with big temperature difference or low temperature environment; Even, also limit because of the size of stranded tight cover unit to having by the stranded tight cover inside cable structure that forms of anti-contraction elements, cause the center reinforcing element of stranded tight cover unit meticulous, be difficult to offset the retraction of whole optical cable.Other kinds structure by inside cable develops also all has certain defective.
Existing outdoor optical cable nearly all is the loose sleeve structure that adopts, and its transmission medium is colored optical fiber.If in optical fiber loose tube, add tight tube fiber, can produce swelling or chemical reaction between the fine cream of the filling that itself and routine are used, the tight tube fiber and the shell material of band tight sleeve layer easily stick together in extrusion, and can bring the technical matterss such as additional attenuation of transmission signals thus.If still indiscriminately imitate the design of outdoor optical cable, make corresponding fiber connector with colored optical fiber, then must adopt specially designed web member and produce extra web member expense, and the complex manufacturing technology of its termination, yield rate is not high, cause the whole connecting line expense increase that optical cable is formed of zooming out, reliability reduces.
That uses between communication mobile base station antenna and base station zooms out in the optical cable, to being exposed to outdoor part technical requirements such as can preventing unfirmly closing, thunderbolt, air gun gunslinging need be arranged; Then need to take into full account the requirement of aspects such as fire-retardant, mouse bite preventing to being positioned at indoor part; Simultaneously this class zoom out optical cable need external diameter little, soft, be easy to coil characteristics such as stay.The optic cable design of using at present that zooms out is difficult to accomplish the satisfied fully simultaneously requirement to these indoor and outdoor varying environment usabilities.
The existing tight cover of the general employing of the optical cable subelement that zooms out is stranded, adds the mode of fire-retardant oversheath.This structure of being made up of tight cover subelement that zooms out optical cable is based on inside cable and develops, though have good softness, advantage such as fire-retardant, but in outdoor performance, particularly optical fiber attenuation still can not be compared with the outdoor optical cable of loose nested structure under high-low temperature resistant and the big temperature difference condition, protection against rodents, anti-unfirmly closing, on the performances such as anti-side pressure also well below the requirement of the optical cable of outdoor loose nested structure.
The utility model content
At above-mentioned situation, the optical cable that the utility model will provide a kind of less radio-frequency extension unit of new structure form to use to solve the problems referred to above that zoom out at present in the optical cable, satisfies the use needs that zoom out optical cable between radio communication mobile base station antenna and the base station.
The utility model less radio-frequency extension unit is in the center pine sleeve pipe of being filled by non-oily packing material with the structure of optical cable, is transmission medium with the tight tube fiber, and center pine sleeve pipe has steel band coating and fire-retardant outer jacket structure layer outward.
An advantage of central tubular structural design is to have certain anti-lightning strike effect.Said heart pine sleeve pipe in the said structure, generally can adopt polybutylene terephthalate (PBT), polycarbonate (PC), polypropylene (PP), low smoke halogen-free flame-retardant polyolefin (LSZH), Polyvinylchloride materials such as (PVC) to make, or by wherein any two kinds of bilayer sleeves that material constitutes, diameter can be 2～6 millimeters, and preferred external diameter is 2.5～5.0 millimeters.
The non-oily packing material of filling in the pine sleeve pipe of center, can have the various reinforcing fiber materials of using in the optical cable at present, as aramid yarn, polyester yarn, E-organdy, and select in the dry material nonoleaginous such as material water-proof material of polyacrylate such as water blocking yarn or water-proofing powder or polyacrylate.The effect of these packing materials is the vertical resistance effects for the guarantee sleeve pipe, but and/or optical cable increase longitudinal tensile strength.Test shows, adopts these packing materials nonoleaginous, can satisfy the compatibility of itself and tight tube fiber, and can not produce influence of fading.
On the said structure basis, according to using needs, can also be equipped with nonmetallic materials between center pine sleeve pipe in said structure and the steel band coating and strengthen structural sheet, as in optical cable, having the various nonmetal fortifying fibre structural sheet that uses at present, or the banded structure layer of forming by fortifying fibre, also can be for band with resistance effect or yarn texture layer etc., as aramid yarn, polyester yarn, E-organdy, glass fiber tape etc.If optical cable has the higher requirement that blocks water, can add the above-mentioned non-metal yarn or the water blocking yarn that have water stop function, or vertical bag waterstop.
As the tight tube fiber of transmission medium, be the version by low smoke halogen-free flame-retardant polyolefin (LSZH) or Polyvinylchloride (PVC) material covering in the said structure, its diameter generally can be 500～900 microns, is preferably 600～700 microns.This tight tube fiber that is provided with in institute's said central pine sleeve pipe generally can be two or four as required.
Said this steel band coating in the structure can be adopted as the structure of indulging packet mode or wrapped mode, generally can select Rockwell's hardness to be not less than the cold-rolled strip of HR30T57.Steel band is 0.10～0.30 millimeter, is preferably 0.12～0.15 millimeter the chromium plating steel band or the flat rubber belting or the embossing steel band of Stainless Steel material that to select thickness the latter's embossing height should not be above 0.8 millimeter.Particularly going back double-coated outside steel band has 0.02～0.08 millimeter, is preferably 0.04～0.06 millimeter composite layer, and this compound substance can be selected as low density polyethylene commonly used, ethene-polyacrylic resin, ethene-methyl polyacrylic resin, ethylene-vinyl acetate resin etc.By evidence, such steel band coating can resist effectively that biting of common home mouse stung or the attack of pneumatic gun gunslinging.
Because the optical cable used of less radio-frequency extension unit is to be applied to two kinds of different environment of indoor and outdoors, should consider to satisfy light aging, weatherability, characteristics such as fire-retardant simultaneously to protective cover material.Said fire-retardant external sheath layer, first-selected flame retardant polyolefin jacket material and flame retardant polyurethane protective cover material in the said structure.The characteristics of flame retardant polyolefin jacket material are soft, are easy to that dish stays and cost is low; The characteristics of flame retardant polyurethane protective cover material are good weatherability, have advantages such as elasticity, resistance to chemical attack.Under some particular case, also can select PVC (Polyvinylchloride) protective cover material and polyethylene sheath material etc. for use.PVC is mainly used in the situation that house line's great distance is longer than outdoor circuit, and polyethylene sheath material can be used for the optical cable that zooms out of open-air base station.The thickness of sheath is 0.8～2.0 millimeter, is preferably 1.0～1.5 millimeters.
Test findings shows, the utility model said structure form to zoom out the external diameter that optical cable can have little, in light weight, be easy to lay, can be fit to the different usability requirements of big temperature difference condition and indoor environment/outdoor conditions simultaneously, possess characteristics such as stronger mechanical property and necessary anti-damaged by rats, anti-thunderbolt, anti-unfirmly closing, anti-gunshot, can satisfy the use needs that zoom out optical cable between radio communication mobile base station antenna and the base station fully.Owing to used tight tube fiber, also be easy to joints of optical fibre manufacturer and make special less radio-frequency and zoom out the joints of optical fibre as transmission medium.
Below in conjunction with the embodiment of accompanying drawing illustrated embodiment, foregoing of the present utility model is described in further detail again.But this should be interpreted as that the scope of the above-mentioned theme of the utility model only limits to following example.Do not breaking away under the above-mentioned technological thought situation of the utility model, various replacements or change according to ordinary skill knowledge and customary means are made all should be included in the scope of the present utility model.
Description of drawings
Fig. 1 is a kind of structural representation of the utility model less radio-frequency extension unit with optical cable.
Fig. 2 is the another kind of structural representation of the utility model less radio-frequency extension unit with optical cable.
Embodiment
Fig. 1 is a kind of typical structure of the utility model less radio-frequency extension unit with optical cable.In the tight tube fiber 3 centerings pine sleeve pipe 2 of two bands PVC or LSZH hard-pressed bale layers, the external diameter of tight tube fiber 3 is 850 microns.Fill and the parallel non-oily packing materials 1 such as strong component and material water-proof material that are placed with in the center pine sleeve pipe 2.This stiffener is an aramid fiber; Material water-proof material is to be stained with the polyester silk thread that scribbles water-proofing powder.The external diameter of center pine sleeve pipe 2 is 3.0 millimeters.The embossing steel band coating 5 of the two-sided plastic-coated of vertical bag outside the pine sleeve pipe 2 of center, the two-sided chromium plating of steel band master tape, and two-sided laminating polyethylene film, thickness is 0.125 millimeter, 0.5 millimeter of embossing height.Embossing steel band coating 5 is outer, and to be enclosed with a layer thickness with extrusion way be 1.2 millimeters the fire-retardant outer jacket structure layer 4 of low-smoke halogen-free polyolefin sheath material.This structure extension unit optical cable is suitable with the conventional cable outer diameter that zooms out, but can possess attenuation stability energy under better anti-side pressure performance, fire resistance, big temperature difference environment and the high low temperature, certain rodent-proof characteristic, also has suitable flexibility simultaneously.
Fig. 2 is a kind of typical structure of the utility model less radio-frequency extension unit with optical cable.Four are with PVC or LSZH is that the external diameter of tight tube fiber 3 is 600 microns in the tight tube fiber 3 centerings pine sleeve pipe 2 of hard-pressed bale layer.The non-oily packing materials 1 of filling in the center pine sleeve pipe 2 vertically flow along center pine sleeve pipe to prevent water part for the dry type powder that blocks water.The external diameter of center pine sleeve pipe 2 is 4.2 millimeters.Outside the pine sleeve pipe 2 of center, be arranged with nonmetallic materials such as stiffener and material water-proof material in parallel and strengthen structural sheet 6.This stiffener can be glass fiber tape, and material water-proof material can be waterstop.Its outside is surrounded with the stainless steel band coating 5 that thickness is 0.25 millimeter two-sided plastic-coated, and lay of lapping is 15 millimeters, and guarantees that the wrapped back of steel band overlaps each other.At last, outside steel band coating 5, extrude the fire-retardant outer jacket structure layer 4 of low-smoke halogen-free polyolefin of one deck 1.5 millimeters thick.The external diameter that zooms out optical cable is 8.6 millimeters.
Claims (10)
1. the optical cable used of less radio-frequency extension unit, it is characterized in that in the center pine sleeve pipe (2) of being filled by non-oily packing material (1), with tight tube fiber (3) is transmission medium, and steel band coating (5) and fire-retardant outer jacket structure layer (4) are arranged outside the center pine sleeve pipe (2).
2. the optical cable that less radio-frequency extension unit as claimed in claim 1 is used is characterized in that also being provided with nonmetallic materials between said center pine sleeve pipe (2) and steel band coating (5) strengthens structural sheet (6).
3. the optical cable that less radio-frequency extension unit as claimed in claim 2 is used is characterized in that strengthening structural sheet (6) for the filamentary structure layer or by fibrous banded structure layer in said nonmetallic materials.
4. the optical cable that less radio-frequency extension unit as claimed in claim 1 is used is characterized in that being the version by low smoke halogen-free flame-retardant polyolefin or pvc material covering at said tight tube fiber (3).
5. the optical cable of using as the described less radio-frequency extension unit of one of claim 1 to 4 is characterized in that said non-oily packing material (1) is fibrous fortifying fibre or water blocking yarn structure, or the water-proofing powder of granular structure.
6. the optical cable of using as the described less radio-frequency extension unit of one of claim 1 to 4 is characterized in that said steel band coating (5) is vertical packet mode structure or wrapped formula structure.
7. the optical cable of using as the described less radio-frequency extension unit of one of claim 1 to 4 is characterized in that flat strip steel or the embossing steel band of said steel band coating (5) for 0.1～0.3 millimeter of thickness, embossing height≤0.8 of embossing steel band millimeter.
8. the optical cable of using as the described less radio-frequency extension unit of one of claim 1 to 4 is characterized in that said steel band coating (5) is two-sided chromium plating steel band or the stainless steel band that has the coating layer structure.
9. the optical cable of using as the described less radio-frequency extension unit of one of claim 1 to 4, the thickness that it is characterized in that said fire-retardant external sheath layer (4) is 0.8～2.0 millimeter.
10. the optical cable of using as the described less radio-frequency extension unit of one of claim 1 to 4 is characterized in that the tight tube fiber (3) in institute's said central pine sleeve pipe (2) is two or four.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202437169U CN201622374U (en) | 2009-12-03 | 2009-12-03 | Optical cable for wireless remote RF unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202437169U CN201622374U (en) | 2009-12-03 | 2009-12-03 | Optical cable for wireless remote RF unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201622374U true CN201622374U (en) | 2010-11-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202437169U Expired - Lifetime CN201622374U (en) | 2009-12-03 | 2009-12-03 | Optical cable for wireless remote RF unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201622374U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269852A (en) * | 2010-06-07 | 2011-12-07 | 沈群华 | Optical fiber with skeleton groove for wireless radio remote unit |
| CN102749689A (en) * | 2012-07-06 | 2012-10-24 | 北京亨通斯博通讯科技有限公司 | Flat photoelectric composite optical cable and production method thereof |
| CN102819079A (en) * | 2012-08-17 | 2012-12-12 | 苏州南智传感科技有限公司 | Tight tube optical fiber grating serial sensing optical cable |
| CN104091645A (en) * | 2014-07-29 | 2014-10-08 | 成都大唐线缆有限公司 | Photoelectric composite cable for base station |
| CN105204132A (en) * | 2015-11-03 | 2015-12-30 | 江苏亨通光电股份有限公司 | Light armored mouse-roof remote cable manufacturing method and cable |
| CN111190257A (en) * | 2020-02-28 | 2020-05-22 | 江苏中天科技股份有限公司 | Indoor and outdoor dual-purpose optical cable |
-
2009
- 2009-12-03 CN CN2009202437169U patent/CN201622374U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269852A (en) * | 2010-06-07 | 2011-12-07 | 沈群华 | Optical fiber with skeleton groove for wireless radio remote unit |
| CN102749689A (en) * | 2012-07-06 | 2012-10-24 | 北京亨通斯博通讯科技有限公司 | Flat photoelectric composite optical cable and production method thereof |
| CN102819079A (en) * | 2012-08-17 | 2012-12-12 | 苏州南智传感科技有限公司 | Tight tube optical fiber grating serial sensing optical cable |
| CN104091645A (en) * | 2014-07-29 | 2014-10-08 | 成都大唐线缆有限公司 | Photoelectric composite cable for base station |
| CN105204132A (en) * | 2015-11-03 | 2015-12-30 | 江苏亨通光电股份有限公司 | Light armored mouse-roof remote cable manufacturing method and cable |
| CN111190257A (en) * | 2020-02-28 | 2020-05-22 | 江苏中天科技股份有限公司 | Indoor and outdoor dual-purpose optical cable |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101103 |