WO2022143346A1 - Ensemble câble coaxial à fuite applicable à une communication 5g et procédé de fabrication associé - Google Patents

Ensemble câble coaxial à fuite applicable à une communication 5g et procédé de fabrication associé Download PDF

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Publication number
WO2022143346A1
WO2022143346A1 PCT/CN2021/140530 CN2021140530W WO2022143346A1 WO 2022143346 A1 WO2022143346 A1 WO 2022143346A1 CN 2021140530 W CN2021140530 W CN 2021140530W WO 2022143346 A1 WO2022143346 A1 WO 2022143346A1
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WIPO (PCT)
Prior art keywords
slot
outer conductor
leaky coaxial
coaxial cable
cable assembly
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PCT/CN2021/140530
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English (en)
Chinese (zh)
Inventor
郭志宏
肖可成
钱熙文
唐青
郭雪雅
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江苏俊知技术有限公司
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Publication of WO2022143346A1 publication Critical patent/WO2022143346A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/20—Non-resonant leaky-waveguide or transmission-line antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/203—Leaky coaxial lines
    • 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
    • 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
    • H01B11/20—Cables having a multiplicity of coaxial lines
    • 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
    • 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
    • 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/20—Non-resonant leaky-waveguide or transmission-line antennas; Equivalent structures causing radiation along the transmission path of a guided wave

Definitions

  • the present invention relates to the technical field of communication transmission, in particular to a leaky coaxial cable.
  • leaky coaxial cable as an important signal transmission medium, can be used not only as a transmission line, but also as a signal transceiver antenna, and is widely used in the coverage of wireless signal blind spots in narrow and long areas.
  • the high-frequency electromagnetic wave transmission signal is more complicated by the leakage of the coaxial cable structure and the environment, the design and manufacture of the product structure are difficult, and it has always been a high-tech product type in the field of coaxial cable production.
  • leaky coaxial cables are more suitable for applications in narrow, long, closed environments, such as subways, tunnels, caves, mines, and other areas.
  • narrow, long, closed environments such as subways, tunnels, caves, mines, and other areas.
  • new technologies and new materials used in the communication field continue to emerge, which not only brings about the improvement of product performance requirements, but also brings about changes in product process technology.
  • communication services are becoming a necessities of life like water supply and power supply, which requires wide coverage of communication signals and no blind spots; on the other hand, in order to achieve high-speed, high-bandwidth information transmission, the frequency of continuously rising.
  • the increase of communication frequency brings the increase of electromagnetic signal space transmission attenuation and the increase of building penetration loss, which increases the difficulty of wireless signal coverage in narrow and long closed areas.
  • the existing leaky coaxial cable is used in the high frequency band of 5G mobile communication, it is difficult to take into account the two important performance indicators of longitudinal transmission attenuation and coupling loss, and cannot meet the requirements of transmission distance and effective signal coverage at the same time. To this end, it is necessary to redesign the product structure and production method to meet the communication requirements of 5G mobile communication with high speed, strong signal and long transmission distance.
  • the technical problem to be solved by the present invention is to provide a leaky coaxial cable assembly suitable for 5G communication with strong signal coverage, long transmission distance, and convenient deployment, and a manufacturing method thereof.
  • a leaky coaxial cable assembly suitable for 5G communication including:
  • the two insulated cable cores are arranged in parallel along the length direction thereof;
  • the outer conductor is wrapped on the two insulating cable cores, and the two insulating cable cores are formed into an integrated structure, and the outer surface of the outer conductor is provided with several a first slot hole and a second slot hole, the first slot hole and the second slot hole are arranged in pairs, and the first slot hole and the second slot hole are arranged orthogonally;
  • sheath layer covering the outer conductor.
  • the electromagnetic wave signals radiated from the two leaky coaxial cables formed by the two insulated cable cores are orthogonally superimposed.
  • the signal coverage strength can be enhanced, and on the other hand, the single The number of slots on the outer conductor of the leaky coaxial cable reduces the energy leakage and longitudinal transmission attenuation value of a single leaky coaxial cable, and increases the transmission distance of the leaky coaxial cable assembly, thereby reducing the overall coverage in the system. Following the equipment cost, pre-laying and post-maintenance costs.
  • the two insulating cable cores are arranged in an "8" shape, and the outer conductor is wrapped on the two insulating cable cores in an integrated longitudinal wrapping manner.
  • the outer conductor is a double-layer copper-plastic composite film
  • the double-layer copper-plastic composite film includes two copper layers and a plastic layer
  • the thickness of the copper layer ranges from 0.1 mm to 0.2 mm. mm
  • the thickness of the plastic layer ranges from 0.08 mm to 0.2 mm.
  • the communication requirements can be met without affecting the performance of the leaky coaxial cable assembly suitable for 5G communication.
  • the insulating cable core includes an inner conductor and an insulating layer, and the insulating layer coats the outer side of the inner conductor to isolate the inner conductor and the outer conductor.
  • the first slot hole and the second slot hole are periodically arranged rectangular slot holes, and there is an interval between the first slot hole and the second slot hole .
  • the length of the first slot hole and the second slot hole ranges from 10 mm to 35 mm, and the width ranges from 3 mm to 6 mm.
  • the first slot hole and the second slot hole can radiate the electromagnetic field to the outside of the outer conductor, and the size of the slot hole can be set to meet the operating frequency of the transmission signal, the external environment, the user Requirements such as signal coverage strength in the blind area are required.
  • the positions of the first slot hole and the second slot hole correspond to the positions of the two insulating cable cores, respectively, and the first slot hole and the second slot hole are arranged in parallel along the length direction of the outer conductor.
  • the length direction of the outer conductor is from left to right as the first direction
  • the angle between the first slot and the first direction is -45°
  • the second slot The angle between the hole and the first direction is 45°
  • the center point of each pair of the first slotted hole and the center point of the second slotted hole form a plane A, where the plane A and the first direction are located.
  • the horizontal plane B is vertical.
  • the orthogonal superposition of the radiated electromagnetic signals can be better achieved, and the strength of the signal coverage can be further enhanced.
  • the specifications of the two insulated cable cores are the same.
  • the energy intensity of the signals transmitted in the leaky coaxial cable can be kept consistent.
  • the present invention also provides a manufacturing method of a leaky coaxial cable assembly suitable for 5G communication, comprising the following steps:
  • S1 Select two insulated cable cores with the same specifications, and arrange them side by side to form a "8" shape;
  • the radiated electromagnetic wave signals at the same position of the two insulated cable cores are orthogonally superimposed on the signal transmission path, and the superimposed superimposed signals radiated from the leaky coaxial cable assembly suitable for 5G communication are realized.
  • the magnitudes of the two perpendicular linearly polarized waves E x and E y are basically the same.
  • the polarization axis ratio (the ratio of the instantaneous maximum value to the minimum value of the radiation field) is less than 3dB, circular polarization can be achieved.
  • the leaky coaxial cable assembly suitable for 5G communication with the radiation field strength working in the circular polarization mode can transmit and receive signals in different polarization directions to the greatest extent, and further enhance the coverage of the signal.
  • FIG. 1 is a schematic structural diagram of a leaky coaxial cable assembly suitable for 5G communication provided by the present invention
  • FIG. 2 is a schematic cross-sectional view of a leaky coaxial cable assembly suitable for 5G communication provided by the present invention
  • FIG. 3 is a schematic structural diagram of a double-layer copper-plastic composite film provided by the present invention.
  • FIG. 4 is a flowchart of a method for manufacturing a leaky coaxial cable assembly suitable for 5G communication provided by the present invention
  • FIG. 5 is a schematic diagram of the coating process of the double-layer copper-plastic composite film in the manufacturing method of the leaky coaxial cable assembly suitable for 5G communication provided by the present invention.
  • the present invention provides a leaky coaxial cable assembly suitable for 5G communication.
  • the leaky coaxial cable assembly suitable for 5G communication is sequentially provided with an insulating cable core 1 , an outer conductor 2 and an insulating cable from inside to outside. Sheath layer 3.
  • the number of the insulating cable cores 1 is two, and the two insulating cable cores 1 are arranged in parallel along the length direction thereof.
  • the outer conductor 2 is wrapped on the two insulating cable cores 1, and the two insulating cable cores 1 are formed into an integrated structure.
  • the outer surface of the outer conductor 2 is provided with a number of first slot holes 201 and a number of first slot holes 201 along the length direction of the outer conductor 2.
  • Two slot holes 202, the first slot hole 201 and the second slot hole 202 are arranged in pairs, and the first slot hole 201 and the second slot hole 202 are arranged orthogonally.
  • the sheath layer 3 covers the outer conductor 2 .
  • the two insulating cable cores 1 are arranged in parallel to form an "8" shape, and the outer conductor 2 is wrapped on the two insulating cable cores 1 by an integrated longitudinal wrapping method.
  • the outer conductor 2 is a double-layer copper-plastic composite film
  • the double-layer copper-plastic composite film includes two copper layers 203 and a plastic layer 204
  • the copper layer 203 is a copper tape, such as TU2 type oxygen-free copper, copper
  • the thickness of the layer 203 ranges from 0.1 mm to 0.2 mm.
  • the plastic layer 204 is made of ethylene acrylic acid copolymer or ethylene methacrylic acid copolymer.
  • the thickness of the plastic layer 204 ranges from 0.08 mm to 0.2 mm.
  • the two copper layers 203 are respectively provided with a first slot hole 201 and a second slot hole 202 , and the plastic layer 204 is not provided with a slot hole.
  • ⁇ is the skin depth
  • ⁇ is the angular frequency
  • M is the magnetic permeability
  • ⁇ is the resistivity
  • the thickness of the copper layer 203 of the copper-plastic composite film can meet the communication requirements at high frequencies, and can be used as the outer conductor of the leaky coaxial cable assembly suitable for 5G communication without affecting the leaky coaxial cable assembly suitable for 5G communication. high-frequency electrical performance.
  • the two insulated cable cores 1 are arranged in an "8" shape, covered with the same outer conductor 2, and the first slot 201 and the second slot 202 are orthogonally arranged on the outer conductor 2, so that the two insulated cables
  • the electromagnetic wave signals radiated in core 1 are orthogonally superimposed, and the outward radiated signal of the leaky coaxial cable assembly suitable for 5G communication works in a circular polarization mode, which enhances the strength of the signal within the coverage area and the length of longitudinal transmission.
  • the insulating cable core 1 includes an inner conductor 101 and an insulating layer 102 , the insulating layer 102 covers the outer side of the inner conductor 101 , and the insulating layer 102 separates the inner conductor 101 and the outer conductor 2 is isolated.
  • the inner conductor 101 is a copper-clad aluminum wire, but it is not limited to this, and may also be a copper tube or a corrugated copper tube.
  • the material of the insulating layer 102 determines the speed of electromagnetic wave propagation.
  • the insulating layer 102 is foamed polyolefin, but it is not limited to this, and can also be polytetrafluoroethylene, microporous polytetrafluoroethylene, etc. A high degree of insulating layer can reduce the attenuation of the signal.
  • the sheath layer 3 is made of polyolefin, but it is not limited to this, and can also be made of flame-retardant polyolefin, polyvinyl chloride, etc., as long as the purpose of protecting the cable from mechanical damage can be achieved, and at the same time when required It can be flame retardant.
  • the two insulating cable cores 1 are the same, for example, they can be cut from the same insulating cable core, or two insulating cable cores with the same specifications produced in the same batch, the same process, and the same equipment are selected. In this way, the strength of the electromagnetic signal energy transmitted by the leaky coaxial cable assembly suitable for 5G communication can be kept consistent, and the orthogonal superposition of the radiated electromagnetic signal can be effectively realized, and the strength of the signal coverage is enhanced.
  • the first slot holes 201 are rectangular slot holes arranged periodically, and there may be 1-4 first slot holes 201 in one cycle, which is not limited here. , which can be set according to actual needs.
  • the second slot holes 202 are also periodically arranged rectangular slot holes, and there may be 1-4 second slot holes 202 in one cycle, which is not limited here, and can be set according to actual needs.
  • the positions of the first slot 201 and the second slot 202 correspond to the positions of the two insulating cable cores 1 respectively, and there is a gap between the first slot 201 and the second slot 202 .
  • the length of the slot hole 201 and the second slot hole 202 ranges from 10 mm to 35 mm, and the width ranges from 3 mm to 6 mm.
  • the first slot 201 and the second slot 202 can radiate the electromagnetic field to the outside of the outer conductor 2, and the size of the slot can meet the requirements of the operating frequency of the transmission signal, the external environment, and the signal coverage strength in the blind area required by the user.
  • the periodically arranged first slot holes 201 and the second slot holes 202 are arranged in parallel along the length direction of the outer conductor 2 , and the first slot holes 201 and the second slot holes 202 are orthogonal, for example, the outer conductor 2
  • the length direction from left to right is the first direction
  • the angle between the first slot 201 and the first direction is -45°
  • the angle between the second slot 202 and the first direction is 45°
  • the center point of the slot 201 and the center point of the second slot 202 form a plane A
  • the plane A is perpendicular to the horizontal plane B where the first direction is located, which can not only increase the total energy transmitted by the leaky coaxial cable assembly suitable for 5G communication, but also
  • make the electromagnetic waves radiated in the two insulated cable cores 1 better orthogonally superimpose in the direction of 45 ⁇ and -45 ⁇ , on the one hand, the signal interference between the two insulated cable cores 1 can be eliminated, and the coherence gain of the signal
  • the multiple-input multiple-output (MIMO) technology of the 5G transmission system can also be fully utilized to realize the spatial division multiplexing gain of the signal.
  • the two insulated cable cores 1 are covered with the same outer conductor 2, so that the first slot 201 and the second slot 202 on the outer conductor 2 can be neatly and uniformly arranged in a place suitable for 5G communication.
  • the same side of the leaky coaxial cable assembly so that the phase difference of the two components of the electric field vector of the electromagnetic wave radiated by the two insulated cable cores 1 is 90°, and the magnitude is equal.
  • the polarization axis ratio (the instantaneous maximum value and minimum value of the radiation field)
  • the elliptical polarization can be converted into circular polarization, and the leaky coaxial cable assembly suitable for 5G communication with the radiation field strength working in the circular polarization mode can transmit and receive signals in different polarization directions to the greatest extent. signal to further enhance the coverage of the signal.
  • the first slot holes 201 and the second slot holes 202 are respectively arranged in the longitudinal direction of the outer conductor 2 with the pitch P as the period.
  • the pitch P can be calculated according to the formula of the principle of space harmonic generation: Where: P is the periodic pitch of the first slot hole or the second slot hole, C is the propagation speed of light in vacuum, f 1 is the minimum operating frequency within the operating frequency band of the leaky coaxial cable assembly suitable for 5G communication, ⁇ ⁇ is the relative dielectric constant of the insulating layer, which is about 1.22.
  • P the period Pitch
  • n a positive integer starting from 1, representing the n+1th spatial harmonic.
  • the size of the pitch P is about one-half of the wavelength corresponding to the lowest operating frequency in the operating frequency band of the leaky coaxial cable assembly suitable for 5G communication.
  • the center-to-center spacing P n of a series of periodically adjacent first slot holes 201 or second slot holes 202 is as follows:
  • Number of slots in a single cycle 1 2 3 4 Center distance between slots (mm) —— 28.6 14.3 9.5
  • the present invention also provides a method for manufacturing a leaky coaxial cable assembly suitable for 5G communication, comprising the following steps:
  • S1 Select two insulated cable cores with the same specifications, and arrange them side by side to form a "8" shape;
  • S4 Cover the outer side of the outer conductor with a sheath layer to tighten and fix the outer conductor on the two insulated cable cores.
  • the two insulated cable cores with the same specifications in step S1 can be cut from the same insulated cable core, or they can be two insulated cable cores of the same specification produced in the same batch, the same process, and the same equipment. , so that the two insulated cable cores are on the signal transmission path, and the field strength of the radiated electromagnetic wave signal at the same position is basically the same.
  • the outer conductor adopts a double-layer copper-plastic composite film, that is, it includes two copper layers and a plastic layer, and the two insulating cable cores are placed on both sides of the double-layer copper-plastic composite film (as shown in The method of the near-type forming mold and the horn-shaped mold is gradually tightened, and the copper layer and the plastic layer of the copper-plastic composite film are longitudinally wrapped on the outer surfaces of the two insulating cable cores, and the two copper layers are respectively provided with a first slot hole. and the second slot.
  • the method can realize the orthogonal superposition of radiated electromagnetic wave signals at the same position with two insulated cable cores on the signal transmission path.
  • step S3 the orientations of the first slot hole and the second slot hole are fine-tuned, so that in the superimposed electromagnetic wave signal radiated by the leaky coaxial cable assembly suitable for 5G communication, two mutually perpendicular linearly polarized waves E x can be realized.
  • the size of E y is basically the same.
  • the polarization axis ratio (the ratio of the instantaneous maximum value to the minimum value of the radiation field) is less than 3dB, the circular polarization working mode can be realized. At this time, the radiation field intensity works in a circular polarization mode.
  • the leaky coaxial cable assembly suitable for 5G communication can transmit and receive signals in different polarization directions to the greatest extent, further enhancing the coverage of the signal.
  • the present invention provides a leaky coaxial cable assembly suitable for 5G communication and a manufacturing method thereof.
  • the two insulated cable cores are covered by the same outer conductor to realize the transmission of the leaky coaxial cable in the form of an assembly.
  • it can enhance the The signal coverage strength, on the other hand, effectively reduces the number of slots on the outer conductor of a single leaky coaxial cable, reduces the energy leakage and longitudinal transmission attenuation value of a single leaky coaxial cable, and improves the transmission of the leaky coaxial cable assembly. distance, thereby reducing the cost of relay equipment, pre-laying and post-maintenance costs in the overall coverage system.
  • the leaky coaxial cable assembly suitable for 5G communication.
  • the radiated electromagnetic waves can be orthogonally superimposed, eliminating the signal interference between the two leaky coaxial cables and enhancing the coherence gain of the signal.
  • the two insulated cable cores are of the same specification, which can not only ensure that the energy intensity of electromagnetic signals transmitted in the leaky coaxial cable assembly suitable for 5G communication remains uniform, but also realize the orthogonal superposition of radiated electromagnetic signals.
  • the polarization axis ratio is less than 3dB, circularly polarized signal coverage is formed, which greatly enhances the signal coverage strength.
  • the outer conductor is replaced by a double-layer copper-plastic composite film instead of the traditional copper foil tape, which can reduce the consumption of copper material of the outer conductor and reduce the production cost.
  • the copper foil tape is punched first, then embossed, and then longitudinally wrapped, which can complete the production of two leaky coaxial cables at one time, and directly form a leaky coaxial cable assembly suitable for 5G communication, which simplifies the production steps. .
  • leaky coaxial cable assemblies suitable for 5G communication avoids the traditional need for two leaky coaxial cables to be laid separately, which can solve the installation problem in one construction and deployment, and is suitable for leaky coaxial cable assemblies for 5G communication.
  • the positions of the first slot hole and the second slot hole of the outer conductor are relatively fixed, so that the first slot hole and the second slot hole are directly opposite to the signal coverage area, which improves the construction efficiency, and is suitable for 5G communication due to the reduction in the use of raw materials.
  • the overall weight of the leaky coaxial cable assembly is reduced, which facilitates the deployment and construction and saves the deployment space.

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Abstract

Sont divulgués dans la présente invention, un ensemble câble coaxial à fuite applicable à une communication 5G et un procédé de fabrication associé. L'ensemble câble coaxial à fuite comprend deux âmes de câble isolant, un conducteur externe et une couche de gaine; les deux âmes de câble isolant sont agencées en parallèle le long de la direction de leur longueur; les deux âmes de câble isolant sont enveloppées avec le conducteur externe, de plus, les deux âmes de câble isolant forment une structure intégrée; une pluralité de premiers trous de fente et de seconds trous de fente sont formés dans la surface externe du conducteur externe le long de la direction de la longueur du conducteur externe; chaque premier trou de fente et chaque second trou de fente sont formés par paires; et le premier trou de fente et le second trou de fente sont formés de manière orthogonale; et le conducteur externe est enveloppé avec la couche de gaine. L'utilisation de la solution technique de la présente invention peut améliorer l'intensité de couverture de signal de l'ensemble câble coaxial à fuite applicable à une communication 5G, augmente une distance de transmission de signal et améliore l'efficacité de production et l'efficacité de construction.
PCT/CN2021/140530 2020-12-31 2021-12-22 Ensemble câble coaxial à fuite applicable à une communication 5g et procédé de fabrication associé WO2022143346A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202011622499.1A CN114696104B (zh) 2020-12-31 2020-12-31 适用于5g通信的漏泄同轴电缆组件及其制造方法
CN202011622499.1 2020-12-31

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WO2022143346A1 true WO2022143346A1 (fr) 2022-07-07

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