CN113724933A - High-transmission-rate coaxial cable and manufacturing process thereof - Google Patents
High-transmission-rate coaxial cable and manufacturing process thereof Download PDFInfo
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- CN113724933A CN113724933A CN202110919480.1A CN202110919480A CN113724933A CN 113724933 A CN113724933 A CN 113724933A CN 202110919480 A CN202110919480 A CN 202110919480A CN 113724933 A CN113724933 A CN 113724933A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
- H01B11/1834—Construction of the insulation between the conductors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
- H01B11/1834—Construction of the insulation between the conductors
- H01B11/1856—Discontinuous insulation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/016—Apparatus or processes specially adapted for manufacturing conductors or cables for manufacturing co-axial cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/067—Insulating coaxial cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/14—Insulating conductors or cables by extrusion
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P11/00—Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
- H01P11/001—Manufacturing waveguides or transmission lines of the waveguide type
- H01P11/005—Manufacturing coaxial lines
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P3/00—Waveguides; Transmission lines of the waveguide type
- H01P3/02—Waveguides; Transmission lines of the waveguide type with two longitudinal conductors
- H01P3/06—Coaxial lines
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Abstract
The application relates to a high transmission rate coaxial cable and a manufacturing process thereof, relates to the field of cables, and comprises a central conductor, a hollow dielectric layer, an outer conductor layer, a shielding layer and a sheath layer, wherein the hollow dielectric layer is internally formed into a hollow or gap structure. The transmission rate of the cable can be effectively optimized.
Description
Technical Field
The present application relates to the field of cables, and more particularly, to a high transmission rate coaxial cable and a manufacturing process thereof.
Background
A coaxial cable (coax) is a wire and signal transmission line, and is mainly used for transmission of analog signals and digital signals. When in use, the coaxial cable has the characteristics of high use frequency and strong shielding effectiveness, so that the coaxial cable is widely applied to transmission of various electronic signals.
At present, the cable used in megahertz level frequency is mainly foamed polyethylene type medium coaxial cable, but with the progress of technology, the content of signal transmission is more and more abundant, the bandwidth is increased therewith, the signal transmission frequency is also increased, but the old foamed polyethylene cable can not meet the transmission requirement of high-frequency signals, and the fluoroplastic has relatively low dielectric constant, so the new generation coaxial cable using fluoroplastic as insulating medium gradually replaces the original product.
However, in the field of high-precision testing, equipment needs to complete timing transmission of signals in a narrow space, and higher requirements are put forward on the transmission rate of cables; the current coaxial cable cannot meet the requirement of the existing transmission rate.
Disclosure of Invention
In order to optimize the transmission rate of the coaxial cable, the present application provides a high transmission rate coaxial cable and a manufacturing process thereof.
In a first aspect, the present application provides a high transmission rate coaxial cable, which adopts the following technical solution:
a high transmission rate coaxial cable comprises a central conductor, a hollow dielectric layer, an outer conductor layer, at least one shielding layer and a sheath layer, wherein a hollow or gap structure is formed in the hollow dielectric layer.
By adopting the technical scheme, the hollow dielectric layer with a hollow or gap structure formed inside is coated on the central conductor, so that the dielectric constant of the hollow dielectric layer can be effectively reduced, and the transmission rate in use is effectively improved; in addition, the outer dielectric layer is coated on the hollow dielectric layer, so that the integrity of the hollow dielectric layer and the central conductor is relatively better, the stability of the structure of the hollow dielectric layer can be kept, the attenuation in use is reduced, and the use effect is optimized.
Optionally, the central conductor is a silver-plated copper-clad steel single conductor, and the thickness of the silver-plated layer is less than or equal to 3 um.
By adopting the technical scheme, because the high-frequency current mainly passes through the surface of the central conductor, the silver coating can effectively reduce the resistance on the surface of the central conductor, so that the cost can be controlled while the electrical property of the central conductor meets the practical requirement, and the mechanical strength of the central conductor is optimized.
Optionally, the thickness of the copper plating layer on the central conductor is greater than 10% of the wire diameter of the central conductor.
By adopting the technical scheme, the resistance of the outer layer of the central conductor can be effectively reduced, and the obstruction to high-frequency current in use is reduced.
Optionally, the outer conductor layer is a silver-plated copper strip which is wrapped on the outer wall of the outer dielectric layer through a wrapping process.
Through adopting above-mentioned technical scheme, can keep outer conductor mechanical strength and electrical property simultaneously, can also reduce the degree of difficulty of production.
Optionally, the thickness of the silver layer of the silver-plated copper strip in the outer conductor layer is less than or equal to 3 um.
By adopting the technical scheme, the cost can be controlled while the requirement of electrical property in use is met.
Optionally, the shielding layer is formed by coating silver-plated copper wires on the outer wall of the outer conductor layer through a weaving process.
Through adopting above-mentioned technical scheme, can improve the conductivity of shielding layer relatively to promote the reflection loss and the absorption loss of shielding layer when using, and can optimize the flexibility of shielding layer, with optimization result of use.
Optionally, the sheath layer is formed by wrapping FEP on the outer wall of the shielding layer.
Through adopting above-mentioned technical scheme, the chemical resistance ability and the high temperature resistance ability of restrictive coating when can optimize the use.
Optionally, the hollow dielectric layer is formed by winding a PFA fiber yarn around the outer wall of the central conductor by a winding process.
By adopting the technical scheme, the PFA fiber yarns are wound on the central conductor, so that the gap structures which are uniformly distributed are formed in the formed hollow dielectric layer, and the hollow dielectric layer is relatively and tightly combined with the central conductor through the outer dielectric layer, so that the dielectric constant of the dielectric layer can be effectively reduced when the composite hollow dielectric material is used, and the transmission rate is effectively improved when the composite hollow dielectric material is used.
Optionally, the outer medium layer is an FEP hollow shell formed by extruding FEP on the outer wall of the hollow medium layer in a high-temperature extrusion manner.
Through adopting above-mentioned technical scheme, adopt FEP high temperature to extrude the mode cladding in the hollow dielectric layer, can be effectual combine together with the hollow dielectric layer for can be stable the formation in the hollow dielectric layer is compact be spiral helicine air runner, in order can optimize the wholeness between central conductor, hollow dielectric layer and the outer dielectric layer, the shaping that can also effectual promotion hollow dielectric layer's cavity or clearance structure is more stable.
In a second aspect, the present application provides a manufacturing process of a coaxial cable with high transmission rate, which adopts the following technical solution:
a process for manufacturing a high transmission rate coaxial cable comprising the steps of:
s1, forming the hollow medium layer: tightly winding the fiber filaments made of the insulating medium material on the outer wall of the central conductor, wherein the winding process is tight and uniform;
s2, forming an outer dielectric layer: uniformly extruding the medium material on the outer side of the hollow medium layer by adopting a hot extrusion method to form a medium material hollow shell;
s3, molding the outer conductor layer: the method comprises the following steps of coating a strip-shaped conductive belt made of a conductor material on the outer wall of an outer dielectric layer through a wrapping process to form an outer conductor layer;
s4, forming a shielding layer: adopting a shielding wire to wrap the outer wall of the outer conductor layer by adopting a weaving process to form a shielding layer;
s5, forming a sheath layer: and a non-conductive medium material is coated on the outer layer of the shielding layer by an extrusion method to form a sheath layer.
In summary, the present application includes at least one of the following beneficial technical effects:
when the high-temperature extrusion type hollow dielectric constant transformer is used, the PFA fiber yarns are wound on the central conductor, so that a gap structure which is uniformly distributed can be formed in the formed hollow dielectric layer, and the hollow dielectric layer is relatively and tightly combined with the central conductor through the outer dielectric layer extruded at high temperature, so that the dielectric constant of the dielectric layer can be effectively reduced, and the transmission rate during use is effectively improved.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present application.
FIG. 2 is a flow chart of a fabrication process of an embodiment of the present application.
Description of reference numerals: 1. a center conductor; 2. a hollow dielectric layer; 3. an outer dielectric layer; 4. an outer conductor layer; 5. a shielding layer; 6. a sheath layer.
Detailed Description
The present application is described in further detail below with reference to fig. 1.
The embodiment of the application discloses a high transmission rate coaxial cable. Referring to fig. 1, the high transmission rate coaxial cable includes a central conductor 1, a hollow dielectric layer 2, an outer dielectric layer 3, an outer conductor layer 4, a shielding layer 5, and a sheath layer 6. The shielding layer 5 is provided with at least one layer, which may be one layer, two layers or multiple layers, and is provided as one layer in the embodiment of the present application.
The central conductor 1 is a silver-plated copper-clad steel single conductor formed by plating a copper layer and a silver layer on a steel conductor at one time. Wherein, the thickness of the silver coating is less than or equal to 3um, so as to meet the performance requirement and control the cost.
In addition, the thickness of a silver coating layer in the central conductor 1 is less than or equal to 3um, and the thickness of a copper coating layer is more than 10% of the wire diameter of the central conductor 1; the outer resistance of the central conductor 1 can be effectively reduced, the electrical property requirement in use is met, and meanwhile, the overall mechanical strength of the central conductor 1 can be optimized. Of course, in other embodiments, the center conductor 1 may be made of other materials, such as copper wire.
Referring to fig. 1, a hollow dielectric layer 2 is formed by winding a PFA fiber yarn around the outer wall of a central conductor 1 by a winding process, and the winding process needs to be tight and uniform; the outer medium layer 3 is an FEP hollow shell formed by extruding FEP on the outer wall of the hollow medium layer 2 by adopting a high-temperature extrusion mode of FEP. Wherein, when the coaxial cable with the wire diameter less than or equal to 1.5mm is molded, the diameter of the fiber filaments in the hollow medium layer 2 is less than 0.2 mm.
After the processing is finished, PFA fiber yarns are wound on the outer wall of the central conductor 1 to form a hollow medium layer 2, and then a layer of FEP is extruded on the outer wall of the hollow medium layer 2 to form an outer medium layer 3. Because the PFA fiber yarn can enable one side of the hollow dielectric layer 2 far away from the central conductor 1 and the space between the hollow dielectric layer 2 and the central conductor 1 to stably form a uniform, dense and spiral air flow channel in the winding process, in the process of extruding the FEP into the hollow dielectric layer 2, the FEP can be filled in the air flow channel of the hollow dielectric layer 2 far away from the central conductor 1 and is combined with the fiber yarn in the hollow dielectric layer 2, so that the stable, dense and spiral air flow channel is formed between the hollow dielectric layer 2 and the central conductor 1, the air has a relatively lower dielectric constant, and the dielectric constants of the hollow dielectric layer 2 and the outer dielectric layer 3 can be stably and effectively reduced through the air flow channel, so that the transmission rate in use is improved.
Meanwhile, the central conductor 1 and the outside can be sealed by wrapping the outer dielectric layer 3 in the hollow dielectric layer 2, so that the influence of temperature on the outer dielectric layer 3 and the hollow dielectric layer 2 is reduced, a stable dielectric layer is formed, the attenuation is effectively reduced, and in addition, the flexibility of the cable can be increased while the integral weight of the coaxial cable is lightened by adopting a molding hollow structure.
Of course, in other embodiments, FEP filament may be used for the hollow dielectric layer 2, and other fluoroplastics, such as PFA, may be used for the outer dielectric layer 3. Wherein PFA is soluble polytetrafluoroethylene, and FEP is fluorinated ethylene propylene.
Referring to fig. 1, the outer conductor layer 4 is formed by wrapping a silver-plated copper strip on the outer wall of the outer dielectric layer 3 by a wrapping process, and the thickness of a silver layer in the silver-plated copper strip is not more than 3 um; when can satisfy the use, the cost is controlled and the degree of difficulty of processing is reduced to the electric property of outer conductor layer 4 simultaneously.
The shielding layer 5 is formed by coating silver-plated copper wires on the outer wall of the outer conductor layer 4 through a weaving process, and the sheath layer 6 is formed by coating FEP on the outer wall of the shielding layer 5 in an extrusion mode. When in use, the shielding layer 5 has relatively better shielding performance, and the whole cable also has better bending performance so as to adapt to the use in a small space.
The embodiment of the application also provides a manufacturing process of the coaxial cable with the high transmission rate.
Referring to fig. 2, a process for manufacturing a high transmission rate coaxial cable includes the steps of:
s1, forming the hollow medium layer 2: tightly winding the fiber filaments made of the insulating medium material on the outer wall of the central conductor 1, wherein the winding process is tight and uniform; the fiber yarn can adopt PE fiber yarn, FEP fiber yarn or PFA fiber yarn, and in the embodiment of the application, PAF fiber yarn is adopted.
S2, forming the outer dielectric layer 3: uniformly extruding the medium material on the outer side of the hollow medium layer 2 by adopting a hot extrusion method to form a medium material hollow shell; the dielectric material can be selected from FEP, PTFE, PFA, in this embodiment FEP.
S3, molding the outer conductor layer 4: a strip-shaped conductive belt made of a conductor material is wrapped on the outer wall of the outer dielectric layer 3 through a wrapping process to form an outer conductor layer 4; the conductor material can be selected from copper strip, aluminum strip, copper-clad steel strip, copper-clad aluminum strip or silver-plated copper strip, and the embodiment of the invention is the silver-plated copper strip.
S4, forming the shield layer 5: adopting a shielding wire to cover the outer wall of the outer conductor layer 4 by adopting a weaving process to form a shielding layer 5; the shielding wire is made of a shielding material, and can be a bare copper wire, a copper-clad steel wire, a tinned copper wire or a silvered copper strip, in the embodiment of the application, the silvered copper strip.
S5, forming the sheath layer 6: the non-conductive medium material is coated on the outer layer of the shielding layer 5 by an extrusion method to form a sheath layer 6, and the sheath layer 6 can be made of FEP, PTFE, PFA or PE, and is formed by FEP extrusion in the embodiment of the application.
According to the GJB1215A standard, selecting four types of cables with the same wire diameter and different structures for performance detection, wherein the detection data is the transmission rate and attenuation detected by a network analyzer, the transmission rate is the time for detecting the signal transmission of the cables with the same length by the network analyzer, the transmission speed of different cables is calculated by combining the cable length, and the transmission speed of the cables is obtained by dividing the transmission speed by the light speed.
The first type is a 1.4mm high-speed wire, and the 1.4mm high-speed wire is a coaxial cable manufactured by adopting the structure and the manufacturing process of the embodiment of the application. The second type is a 1.4mm common semi-flexible wire, and the structure of the 1.4mm common semi-flexible wire is different from the high transmission rate coaxial cable in the application in that the hollow dielectric layer 2 and the outer dielectric layer 3 are replaced by dielectric layers formed on the outer wall of the central conductor 1 by adopting FEP extrusion. The third type is 1.4mm super-flexible wire, the difference between 1.4mm super-flexible wire and the coaxial cable with the application high transmission rate is that the hollow dielectric layer 2 and the outer dielectric layer 3 are replaced by dielectric layers formed by wrapping FEP insulating tapes on the outer wall of the central conductor 1. The fourth type is 1.4mm transmission cable, and the difference between 1.4mm transmission cable and the high transmission rate coaxial cable in the present application is that an FEP extrusion mode is adopted to form an outer dielectric layer 3 on the outer wall of the central conductor 1, and then the FEP fiber yarn is wound on the outer wall of the outer dielectric layer 3 to form a hollow dielectric layer 2. The specific test results are shown in the following table:
| 1.4mm high speed wire | 1.4mm common semi-flexible line | 1.4mm super-soft line | 1.4mm transmission cable | |
| Transmission rate | 90% | 70% | 82% | 83％ |
| Attenuation (18GHz) | 5.1dB/m | 5.7 dB/m | 5.5dB/m | 5.4 dB/m |
According to the comparison data table, the transmission rate of the coaxial cable manufactured by adopting the structure and the manufacturing process is obviously higher than that of the conventional coaxial cable, and meanwhile, the attenuation is smaller.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. A high transmission rate coaxial cable comprising a center conductor (1), characterized in that: the cable is characterized by further comprising a hollow dielectric layer (2), an outer dielectric layer (3), an outer conductor layer (4), at least one shielding layer (5) and a sheath layer (6), wherein a hollow or gap structure is formed in the hollow dielectric layer (2).
2. A high transmission rate coaxial cable as defined in claim 1, wherein: the central conductor (1) is a silver-plated copper-clad steel single conductor, and the thickness of the silver-plated layer is less than or equal to 3 um.
3. A high transmission rate coaxial cable as defined in claim 2, wherein: the thickness of the copper plating layer on the central conductor (1) is larger than 10% of the wire diameter of the central conductor (1).
4. A high transmission rate coaxial cable as defined in claim 1, wherein: the outer conductor layer (4) is a silver-plated copper strip which is coated on the outer wall of the outer dielectric layer (3) through a wrapping process.
5. A high transmission rate coaxial cable according to claim 4, wherein: the thickness of the silver layer of the silver-plated copper strip in the outer conductor layer (4) is less than or equal to 3 um.
6. A high transmission rate coaxial cable as defined in claim 1, wherein: the shielding layer (5) is formed by coating silver-plated copper wires on the outer wall of the outer conductor layer (4) through a weaving process.
7. A high transmission rate coaxial cable as defined in claim 1, wherein: the sheath layer (6) is formed by wrapping FEP on the outer wall of the shielding layer (5).
8. A high transmission rate coaxial cable according to any one of claims 1 to 7, wherein: the hollow dielectric layer (2) is formed by winding PFA fiber yarns on the outer wall of the central conductor (1) through a winding process.
9. A high transmission rate coaxial cable as defined in claim 8, wherein: the outer dielectric layer (3) is an FEP hollow shell formed by extruding FEP on the outer wall of the hollow dielectric layer (2) in a high-temperature extrusion mode.
10. A process for manufacturing a high transmission rate coaxial cable, comprising: the method comprises the following steps:
s1, forming the hollow medium layer (2): tightly winding the fiber filaments made of the insulating medium material on the outer wall of the central conductor (1), wherein the winding process is tight and uniform;
s2, forming an outer dielectric layer (3): uniformly extruding the dielectric material on the outer side of the hollow dielectric layer (2) by adopting a hot extrusion method to form a dielectric material hollow shell;
s3, molded outer conductor layer (4): a banded conductive belt made of a conductor material is coated on the outer wall of the outer dielectric layer (3) through a wrapping process to form an outer conductor layer (4);
s4, molded shield layer (5): adopting a shielding wire to cover the outer wall of the outer conductor layer (4) by adopting a weaving process to form a shielding layer (5);
s5, forming sheath layer (6): and a non-conductive dielectric material is coated on the outer layer of the shielding layer (5) by an extrusion method to form a sheath layer (6).
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| CN202110919480.1A CN113724933A (en) | 2021-08-11 | 2021-08-11 | High-transmission-rate coaxial cable and manufacturing process thereof |
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| CN202110919480.1A CN113724933A (en) | 2021-08-11 | 2021-08-11 | High-transmission-rate coaxial cable and manufacturing process thereof |
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| CN212908020U (en) * | 2020-10-09 | 2021-04-06 | 滁州润翰微波科技有限公司 | Improved solid medium radio frequency coaxial cable |
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| US4408089A (en) * | 1979-11-16 | 1983-10-04 | Nixon Charles E | Extremely low-attenuation, extremely low radiation loss flexible coaxial cable for microwave energy in the gigaHertz frequency range |
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| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 528300 25 / 803, building 1, shengyueyuan, No. 33, shunye East Road, Xingtan town, Shunde District, Foshan City, Guangdong Province (residence declaration) Applicant after: Guangdong Sulianke Technology Co.,Ltd. Address before: 528300 25 / 803, building 1, shengyueyuan, No. 33, shunye East Road, Xingtan town, Shunde District, Foshan City, Guangdong Province (residence declaration) Applicant before: Guangdong sulianke Technology Co.,Ltd. |