CN101000812B - Corrogated pipe outer conductor leakage radio-frequency coaxial cable for mobile communication - Google Patents
Corrogated pipe outer conductor leakage radio-frequency coaxial cable for mobile communication Download PDFInfo
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- CN101000812B CN101000812B CN2006101612782A CN200610161278A CN101000812B CN 101000812 B CN101000812 B CN 101000812B CN 2006101612782 A CN2006101612782 A CN 2006101612782A CN 200610161278 A CN200610161278 A CN 200610161278A CN 101000812 B CN101000812 B CN 101000812B
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- outer conductor
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- frequency coaxial
- coaxial cable
- mobile communication
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Abstract
A corrugated tube external conductor type of leakage radio frequency coaxial cable used on mobile communication is prepared as applying CO2 physical-foaming to foam insulation body to make said insulation body have sealed air bubble foaming ratio of 82.5-84%, using aluminum conductor rolled on with V form ring grooves as corrugated external conductor with corrugation depth being 0.15-0.40mm less than that of copper external conductor in the same specification.
Description
Technical field
The invention relates to the improvement of tracking exchage wrinkle copper pipe outer conductor being sewed radio frequency coaxial-cable, relate in particular to a kind of annular of aluminium cheaply line outer conductor and sew radio frequency coaxial-cable.
Background technology
Sew radio frequency coaxial-cable, because outer conductor has slotted eye, movable signal both had axial transmission, has the radial radiation function again, promptly have high-frequency signal transmission wire and antenna dual-use function, be used to movable signal blind areas such as elevator, tunnel, underground parking, realize the seamless covering of movable signal.Basic and the coaxial cable basic identical (Fig. 1) of its structure is to the maximum 82% N by inner wire, foam degrees
2Foamed insulation, U-lag 2 annular line copper pipe outer conductors, sheath are formed, and a certain size oval slotted eye is just opened in difference in outer conductor one side or corresponding both sides.Along with the copper resource scarcity, the copper price skyrockets, and it is 60 yuan/kilogram that the copper price rises by original 45 yuan/kilogram, cause cable cost to promote significantly, economy sharply descends, with 1 kilometer 7/8, and " cable is an example; outer conductor consumes 177 kilograms of copper materials (thickness 0.23mm), increases by 2655 yuan of outer conductor costs.Aluminium is as electric conductor, many (28 yuan/kilogram of the existing market valencys) that price is low again with respect to copper, but, can cause cable transmission decay and coupling loss to increase because resistivity is big than copper, after tested: 7/8 " cable 900MHz increases decay 0.3db/100m approximately, and coupling loss increases 5db.Therefore fail to be used to sew the radio frequency coaxial-cable outer conductor so far.
Summary of the invention
The objective of the invention is to overcome the deficiency of above-mentioned prior art, provide a kind of employing aluminium to make outer conductor, and cable attenuation, coupling loss index meet the Corrogated pipe outer conductor leakage radio-frequency coaxial cable for mobile communication that mobile communication requires.
The object of the invention realizes, mainly by taking: improve the insulation foams degree, adopt the V-shaped groove ring grain and reduce the embossing degree of depth (increasing embossing trough external diameter), the three big transmission attenuation technical measures that reduce, thereby remedy the deficiency that aluminium conductor resistivity height causes decaying, coupling loss increases, guarantee with the aluminium outer conductor sew radio frequency coaxial-cable decay and coupling loss does not increase, can reach the requirement of same specification embossing copper outer conductor cable.Specifically, Corrogated pipe outer conductor leakage radio-frequency coaxial cable for mobile communication of the present invention comprises foamed insulation body and the annular line outer conductor that has slotted eye, it is characterized in that said foamed insulation body adopts CO
2Physical blowing, totally-enclosed pore foam degrees reaches 82.5-84%; Said annular line outer conductor is the rolling aluminium conductor that the V-ring groove is arranged, and the embossing degree of depth reduces 0.15-0.40mm than same specification copper outer conductor.
CO of the present invention
2Physical blowing is meant that not containing blowing promotor adopts CO separately
2Gas foaming.
Said totally-enclosed pore is that a kind of illustrative is described, and refers to that the abscess open cell content is very low, almost all is hole-closing structure, but and non-exponential learn conceptive 100%, an absolute perforate and all do not have.
Insulator polyolefin of the present invention is with prior art N
2Foamed insulation is formed basic identical indifference with polyolefin, for example adopts 69% high density polyethylene (HDPE), 30% low density polyethylene (LDPE) and 1% traditional nucleator, as Celogen Az, azodicarboamide.
The present invention sews radio frequency coaxial-cable, outer conductor annular line pitch and external diameter, a kind of better is to keep that to sew radio frequency coaxial-cable identical with same specification copper outer conductor, can realize with the copper outer conductor sew radio frequency coaxial-cable and equipment exchange, be connected, improve the aluminium outer conductor and sew the versatility of radio frequency coaxial-cable.
In addition, for making aluminium outer conductor cable enough lateral pressure resistant intensity is arranged, aluminium outer conductor thickness of the present invention is preferably 0.25-0.45mm.
Corrogated pipe outer conductor leakage radio-frequency coaxial cable for mobile communication of the present invention proposes to adopt separately CO
2The gas physical blowing improves the insulation foams degree; Change outer conductor annular line U-lag into V-shaped groove; And reduce the same size embossing degree of depth, three reduce the transmission attenuation measure greatly, better solved the technology barrier that adopts the increase of aluminium conductor resistivity to bring cable attenuation and coupling loss to increase, thereby make decay and the coupling loss increase of adopting aluminium conductor to cause obtain canceling compensation, guarantee that cable transmission decay, coupling loss index do not increase, not only reach the decay and the coupling loss level of same specification copper outer conductor cable, but also slightly reduce, 900MHz decay index can reduce 5-10%, and coupling loss reduces 4-8%.In addition, keep native copper outer conductor annular line pitch and external diameter constant, cable interchangeability is good, can realize sewing radio frequency coaxial-cable and equipment room exchange with same specification copper outer conductor, has strengthened the versatility of aluminium outer conductor cable.Adopt the lower aluminium of price to make outer conductor, also make cable flexibility, minimum bending radius slightly be better than the copper outer conductor, can reduce by 95 kilograms/kilometer of cable weight (7/8 " cable); and save freight; weight saving has also made things convenient for construction; especially the cable outer conductor cost can descend significantly, and cost performance improves." coaxial cable is an example, and the copper outer conductor need consume 177 kilograms of copper (thickness 0.23mm), by 60 yuan/kilogram of existing market copper valencys, 10620 yuan of outer conductor costs with 1 kilometer 7/8; Adopt the aluminium outer conductor only to need 82 kilograms in aluminium (thickness 0.35mm), by 28 yuan/kilogram of existing market valencys, 2296 yuan of outer conductor costs, can reduce 8324 yuan of outer conductor costs, reduction reaches 78.4%, and the cable format diameter is big more, the outer conductor cost reduces obvious more, and cost performance is high more.Suitably thicken aluminium conductor, can make cable side reach the industry standard index to resistance to compression.Therefore, the present invention adopts aluminium outer conductor cable combination property not only not descend, and also have on the contrary and improve, be that good, in light weight, the lower-cost novelty of a kind of tracking exchage flexibility is sewed radio frequency coaxial-cable.
Cable CO of the present invention
2Foamed insulation body foam degrees height, and do not have other any blowing promotor compositions, abscess is big and evenly (Fig. 4), and from insulating surface inwards naked eyes can see obvious abscess; And N
2The foaming abscess fine and closely woven (Fig. 3), from insulating surface inwards naked eyes do not see obvious abscess, this is that electric cable foaming insulator of the present invention is distinguished in N
2The obvious distinguishing characteristics of foaming and other foaming.
Below in conjunction with an embodiment, further specify the present invention, embodiment understands the present invention in order to illustrate, rather than to concrete qualification of the present invention.
Description of drawings
Fig. 1 sews the radio frequency coaxial-cable structural representation for prior art copper outer conductor U-lag annular line.
Fig. 2 sews the radio frequency coaxial-cable structural representation for aluminium outer conductor V-shaped groove annular line of the present invention.
Fig. 3 is prior art N
2Physical foam insulation body abscess schematic diagram.
Fig. 4 is CO of the present invention
2Physical foam insulation body abscess schematic diagram.
Embodiment
Embodiment: referring to Fig. 2; the present invention 7/8 " sews radio frequency coaxial-cable 1; comprise φ 9; 0mm smooth copper inner wire, thickness 6.75mm polyethylene foamed insulator, and the vertical bag of thick 0.35mm aluminium strip; argon gas and helium arc welding connect; the rolling annular wrinkle that V-shaped groove 4 is arranged, and the outer conductor crest has continuous oval single row of holes 3, PE or fire retardant polyolefin oversheath.Cable outer conductor annular line pitch 7.0mm, trough external diameter 21.9mm, crest external diameter 24.9mm, insulating barrier adopts CO separately
2Foaming, full cut-off hole foam degrees 83.5%, foam structure is seen Fig. 4.The gained cable is through actual measurement: the 900MHz 3.9db/100m that decays, coupling loss 80db, minimum single bending radius 80mm.
Cable insulation is by the 69wt% high density polyethylene (HDPE), and 30wt% low density polyethylene (LDPE), 1wt% modification Celogen Az nucleator mix to be formed.Adopt independent CO
2Foaming:, heating and gasifying purity reached 99.9% CO with aforementioned dielectric material heating and melting in continuous extruder
2Gas injects melting insulator, abundant mixing mixing by the syringe metering with 400Mpa pressure.200 ℃ of gas injection port place temperature, 150 ℃ of insulation melts temperature, 135 ℃ of extrusion mould-outlet temperature, and the controller neck is to the die orifice temperature difference ± 1.5 ℃ are reduced to about 55 ℃ the inner wire temperature that extrudes behind the endepidermis and are entered die orifice, make to be mixed with CO under the pressurized condition
2The molten mixture of gas by extrusion die, extrudes the inner wire surface that is extruded with endepidermis with crust together, forms the foamed insulation body.
Comparative example: same size, thick 0.23mm copper outer conductor coaxial cable 1, insulating barrier adopts N
2Foaming, the same dielectric material, technological parameter: 200 ℃ of gas injection pressure 350Mpa, gas injection port place temperature, 150 ℃ of insulation melts temperature, 135 ℃ of extrusion mould-outlet temperature, machine neck be to the die orifice temperature difference ± 3.0 ℃, and inner wire extrudes behind the endodermis temperature 80-100 ℃ and enters the foaming head.Range estimation full cut-off hole foam degrees 79%, foam structure is seen Fig. 3.The rolling annular line (Fig. 1) that U-lag 2 is arranged on the copper outer conductor, the outer conductor crest has oval single row of holes 3, PE or fire retardant polyolefin oversheath.Trough external diameter 21.4mm, crest external diameter 24.9mm.Cable actual measurement: the 900MHz 3.95db/100m that decays, coupling loss 80db, minimum single bending radius 90mm.
The present invention can be the same by the copper outer conductor, makes the different size tracking exchage and sew radio frequency coaxial-cable, and different size commonly used sews the radio frequency cable aluminium outer conductor V-shaped groove embossing degree of depth and the depth correlation of copper conductor U-lag embossing sees the following form.
Aluminium outer conductor V-arrangement line of the present invention and prior art copper outer conductor U-shaped line embossing depth correlation table mm
| Specification | U-lag trough mean outside diameter | V-shaped groove trough mean outside diameter | Difference | The degree of depth reduces (%) |
| 1/2″ | 11.7 | 12.1 | 0.4 | 1.71 |
| 7/8″ | 21.4 | 21.9 | 0.5 | 1.17 |
| 1-1/4″ | 32.1 | 32.7 | 0.6 | 0.94 |
| 1-5/8″ | 41.5 | 42.2 | 0.7 | 0.85 |
The construction of cable of the present invention, except that indicate improve all the other all to sew radio frequency coaxial-cable identical with former same specification copper bellows outer conductor.
In addition, outer conductor crest elliptical aperture can also be the double continuous oval slotted eye of symmetry.
Claims (4)
1. Corrogated pipe outer conductor leakage radio-frequency coaxial cable for mobile communication comprises foamed insulation body and the annular line outer conductor that has slotted eye, it is characterized in that said foamed insulation body adopts CO
2Physical blowing, totally-enclosed pore foam degrees reaches 82.5-84%; Said annular line outer conductor is the rolling aluminium conductor that the V-ring groove is arranged, and the embossing degree of depth reduces 0.15-0.40mm than same specification coaxial cable copper ring shape line outer conductor.
2. according to the described Corrogated pipe outer conductor leakage radio-frequency coaxial cable for mobile communication of claim 1, it is characterized in that the said embossing degree of depth reduces 0.20-0.35mm than same specification copper ring shape line outer conductor.
3. according to the described Corrogated pipe outer conductor leakage radio-frequency coaxial cable for mobile communication of claim 1, it is characterized in that said aluminium outer conductor wall thickness 0.25-0.45mm.
4. according to claim 1,2 or 3 described Corrogated pipe outer conductor leakage radio-frequency coaxial cable for mobile communication, it is characterized in that said aluminium outer conductor annular line pitch and external diameter are identical with same specification copper outer conductor radio frequency coaxial-cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101612782A CN101000812B (en) | 2006-12-08 | 2006-12-08 | Corrogated pipe outer conductor leakage radio-frequency coaxial cable for mobile communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101612782A CN101000812B (en) | 2006-12-08 | 2006-12-08 | Corrogated pipe outer conductor leakage radio-frequency coaxial cable for mobile communication |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101000812A CN101000812A (en) | 2007-07-18 |
| CN101000812B true CN101000812B (en) | 2010-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2006101612782A Expired - Fee Related CN101000812B (en) | 2006-12-08 | 2006-12-08 | Corrogated pipe outer conductor leakage radio-frequency coaxial cable for mobile communication |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102347524A (en) * | 2010-08-02 | 2012-02-08 | 江苏俊知技术有限公司 | Improved flexible coaxial cable for mobile communication |
| CN102592743B (en) * | 2011-01-07 | 2014-05-07 | 珠海汉胜科技股份有限公司 | Coaxial cable and manufacturing method thereof |
| CN102136633A (en) * | 2011-03-11 | 2011-07-27 | 珠海汉胜科技股份有限公司 | Aluminum outer conductor leakage coaxial-cable |
| CN103022610A (en) * | 2012-12-25 | 2013-04-03 | 浙江德通科技有限公司 | Coupled leakage cable |
| CN106601326A (en) * | 2016-12-30 | 2017-04-26 | 通鼎互联信息股份有限公司 | Bending-resistant broadband radiant leakage coaxial cable |
| CN109599678B (en) * | 2017-09-30 | 2024-01-12 | 中天射频电缆有限公司 | Waveguide leaky cable for 5G communication |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3582536A (en) * | 1969-04-28 | 1971-06-01 | Andrew Corp | Corrugated coaxial cable |
-
2006
- 2006-12-08 CN CN2006101612782A patent/CN101000812B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3582536A (en) * | 1969-04-28 | 1971-06-01 | Andrew Corp | Corrugated coaxial cable |
Non-Patent Citations (1)
| Title |
|---|
| 龚清桐.新型漏泄同轴电缆的性能及制造.《电线电缆》.2006,(第3期),11-14. * |
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| CN101000812A (en) | 2007-07-18 |
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