CN214124129U - Integrally formed leaky coaxial cable assembly - Google Patents
Integrally formed leaky coaxial cable assembly Download PDFInfo
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- CN214124129U CN214124129U CN202023303076.1U CN202023303076U CN214124129U CN 214124129 U CN214124129 U CN 214124129U CN 202023303076 U CN202023303076 U CN 202023303076U CN 214124129 U CN214124129 U CN 214124129U
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Abstract
The utility model discloses an integrated leakage coaxial cable component, which comprises two insulated cable cores, an outer conductor and a sheath layer; the two insulated cable cores are arranged in parallel along the length direction of the two insulated cable cores, the outer conductor is coated on the two insulated cable cores and forms an integral structure with the two insulated cable cores, a plurality of first slotted holes and second slotted holes are formed in the outer surface of the outer conductor along the length direction of the outer conductor, the first slotted holes and the second slotted holes are arranged in pairs and are orthogonal to each other, and the sheath layer is coated on the outer conductor. Utilize the technical scheme of the utility model, can strengthen integrated into one piece's leakage coaxial cable subassembly's signal coverage intensity, increased signal transmission distance, improve production efficiency and efficiency of construction.
Description
Technical Field
The utility model relates to a communication transmission technical field, concretely relates to leakage coaxial cable.
Background
In the field of communication transmission, a leaky coaxial cable is used as an important signal transmission medium, can be used as a transmission line and a signal transceiving antenna, and is widely applied to coverage of a wireless signal blind area in a long and narrow area. Meanwhile, high-frequency electromagnetic wave transmission signals are influenced by a leaky coaxial cable structure and the environment more complexly, and the product structure is designed and manufactured with higher difficulty and is a product type with high technical content in the field of coaxial cable production all the time.
Unlike the linear, wide-range coverage of antennas, leaky coaxial cables are more advantageous for applications in long, narrow, closed environments, such as: subway, tunnel, cave, mine etc. In the current 5G era of mobile communication technology, new technology and new material applied in the communication field are continuously emerging, which not only improves the product performance requirement, but also brings the innovation of the product process technology. On one hand, communication service is used as national infrastructure and is becoming a necessity of life like water supply and power supply, which requires wide coverage of communication signals and no blind area; on the other hand, the frequency of communication is increasing to realize high-speed and high-bandwidth information transmission. The improvement of communication frequency brings about the increase of electromagnetic signal space transmission attenuation and the increase of building penetration loss, and improves the wireless signal coverage difficulty of a long and narrow closed area. When the existing leaky coaxial cable is used in a high-frequency band of 5G mobile communication, two important performance indexes of longitudinal transmission attenuation and coupling loss are difficult to be considered, and the requirements of transmission distance and effective signal coverage range cannot be met simultaneously. Therefore, the product structure and the production mode need to be redesigned to meet the communication requirements of high speed, strong signal and long transmission distance of 5G mobile communication.
SUMMERY OF THE UTILITY MODEL
In view of the shortcomings existing in the prior art, the technical problem to be solved in the present invention is to provide an integrally formed leaky coaxial cable assembly with strong signal coverage, long transmission distance and convenient arrangement.
In order to solve the technical problem, the utility model provides a following technical scheme: an integrally formed leaky coaxial cable assembly comprising:
the two insulated cable cores are arranged in parallel along the length direction of the two insulated cable cores;
the outer conductor is coated on the two insulating cable cores and forms an integral structure with the two insulating cable cores, a plurality of first slotted holes and second slotted holes are formed in the outer surface of the outer conductor along the length direction of the outer conductor, the first slotted holes and the second slotted holes are arranged in pairs, and the first slotted holes and the second slotted holes are orthogonally arranged;
the sheath layer is coated on the outer conductor.
By adopting the technical scheme, the electromagnetic wave signals radiated from the two leaky coaxial cables formed by the two insulated cable cores are orthogonally superposed, so that the signal coverage strength can be enhanced, the number of slotted holes in the outer conductor of a single leaky coaxial cable is effectively reduced, the energy leakage and longitudinal transmission attenuation values of the single leaky coaxial cable are reduced, the transmission distance of the leaky coaxial cable assembly is increased, and the cost of relay equipment, early-stage laying and later-stage maintenance in the overall coverage system is reduced.
The utility model discloses an in the embodiment, two insulation cable cores are "8" font and arrange, the mode cladding that the outer conductor indulged the package through the integration is in on two insulation cable cores.
In an embodiment of the present invention, 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 range of the copper layers is 0.1mm-0.2mm, and the thickness range of the plastic layer is 0.08mm-0.2 mm.
By adopting the technical scheme, the communication requirement can be met, and the performance of the integrally formed leaky coaxial cable assembly cannot be influenced.
The utility model discloses an in the embodiment, the insulating cable core includes inner conductor and insulating layer, the insulating layer cladding is in the outside of inner conductor, in order to incite somebody to action the inner conductor reaches the outer conductor is kept apart.
In an embodiment of the present invention, the first slot and the second slot are rectangular slots arranged periodically, and a space is provided between the first slot and the second slot.
In an embodiment of the present invention, the length range of the first slot and the second slot is 10mm to 35mm, and the width range is 3mm to 6 mm.
By adopting the technical scheme, the first slot hole and the second slot hole can enable the electromagnetic field to radiate to the outside of the outer conductor, and the setting of the size of the slot hole can simultaneously meet the requirements of the working frequency of a transmission signal, the external environment, the signal coverage strength in a user-required blind area and the like.
In an embodiment of the present invention, the positions of the first slot and the second slot correspond to the positions of the two insulated cable cores respectively, and the first slot and the second slot are arranged in parallel along the length direction of the outer conductor.
In an embodiment of the present invention, the first direction is a direction from left to right in the length direction of the outer conductor, the included angle between the first slot and the first direction is-45 °, and the included angle between the second slot and the first direction is 45 °.
In an embodiment of the present invention, each pair of the center point of the first slot and the center point of the second slot form a plane a, and the plane a is perpendicular to the horizontal plane B in which the first direction is located.
By adopting the technical scheme, the orthogonal superposition of the radiation electromagnetic signals can be better realized, and the signal coverage strength is further enhanced.
In an embodiment of the present invention, the two insulated cable cores have the same specification.
By adopting the technical scheme, the signal energy intensity transmitted in the leaky coaxial cable can be kept consistent.
Of course, it is not necessary for any particular product to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an integrally formed leaky coaxial cable assembly provided by the present invention;
fig. 2 is a schematic cross-sectional view of an integrally formed leaky coaxial cable assembly according to the present invention;
fig. 3 is a schematic structural view of the double-layer copper-plastic composite film provided by the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which the invention belongs. The use of "first," "second," and similar terms in the description herein do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
As shown in fig. 1 to 3, the present invention provides an integrally formed leaky coaxial cable assembly, which is provided with an insulating cable core 1, an outer conductor 2 and a sheath layer 3 from inside to outside in sequence. The number of the insulated cable cores 1 is two, and the two insulated cable cores 1 are arranged in parallel along the length direction. The outer conductor 2 is coated on the two insulated cable cores 1, the two insulated cable cores 1 form an integral structure, a plurality of first slots 201 and a plurality of second slots 202 are formed in the outer surface of the outer conductor 2 along the length direction of the outer conductor 2, the first slots 201 and the second slots 202 are arranged in pairs, and the first slots 201 and the second slots 202 are arranged orthogonally. The sheath layer 3 is coated on the outer conductor 2. In this embodiment, two insulated cable cores 1 are arranged in parallel in a "8" shape, and the outer conductor 2 is coated on the two insulated cable cores 1 in an integrated longitudinal wrapping manner. In this embodiment, 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, the thickness range of the copper layer 203 is 0.1mm-0.2mm, the plastic layer 204 is made of ethylene acrylic acid copolymer or ethylene methacrylic acid copolymer, the thickness range of the plastic layer 204 is 0.08mm-0.2mm, the two copper layers 203 are respectively disposed on two sides of the plastic layer 204, and the two copper layers 203 are respectively provided with a first slot 201 and a second slot 202. The thickness of the copper-plastic composite film can be selected to meet the communication requirement, and the performance of the integrally formed leaky coaxial cable assembly cannot be influenced. Further, according to the skin depth calculation formula of the high-frequency electromagnetic field transmitted in the metal conductor:
wherein: δ is the skin depth, ω is the angular frequency, μ is the permeability, ρ is the resistivity, and can be calculated as:
therefore, the thickness of the copper layer 203 of the copper-plastic composite film can meet the communication requirement under high frequency, can be used as the outer conductor of the integrally formed leaky coaxial cable assembly, and cannot influence the high-frequency electrical performance of the integrally formed leaky coaxial cable assembly. The utility model discloses carry out "8" font with two insulation cable core 1 and arrange, adopt the cladding of same outer conductor 2, and the quadrature sets up first slotted hole 201 and second slotted hole 202 on outer conductor 2 for the electromagnetic wave signal that radiates out in following two insulation cable core 1 realizes the quadrature stack, and the outside radiation signal work of integrated into one piece's leakage coaxial cable subassembly is circular polarization mode, has strengthened the intensity of the interior signal of coverage and the length of vertical transmission.
As shown in fig. 1 to 2, in the present embodiment, the insulated 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 from the outer conductor 2. In the present embodiment, the inner conductor 101 is a copper-clad aluminum wire, but is not limited thereto, and may be a copper pipe, a corrugated copper pipe, or the like. The material of the insulating layer 102 determines the propagation speed of the electromagnetic wave, but the insulating layer 102 is foamed polyolefin in this embodiment, but is not limited thereto, and may be polytetrafluoroethylene, microporous polytetrafluoroethylene, or the like, and the insulating layer with high foaming degree can reduce the attenuation of the signal. In the present embodiment, the sheath layer 3 is polyolefin, but is not limited thereto, and may be made of flame retardant polyolefin, polyvinyl chloride, or other materials as long as the cable can be protected from mechanical damage and has flame retardant performance when required. In this embodiment, the two insulated cable cores 1 are the same, for example, the two insulated cable cores may be cut from the same insulated cable core, or two insulated cable cores with the same specification and produced in the same batch, the same process, and the same equipment are selected, so that the intensities of electromagnetic signal energy transmitted by the integrally formed leaky coaxial cable assembly are kept consistent, orthogonal superposition of radiation electromagnetic signals is effectively achieved, and the intensity of signal coverage is enhanced.
As shown in fig. 1 to 2, in the present embodiment,the first slots 201 are rectangular slots arranged periodically, and there may be 1 to 4 first slots 201 in one period, which is not limited herein and may be set according to actual requirements. The second slots 202 are also rectangular slots periodically arranged, and there may be 1 to 4 second slots 202 in one period, which is not limited herein and may be set according to actual requirements. In this embodiment, the positions of the first slot 201 and the second slot 202 respectively correspond to the positions of the two insulated cable cores 1, and the first slot 201 and the second slot 202 have a gap therebetween, the length of the first slot 201 and the width of the second slot 202 range from 10mm to 35mm, and the width of the first slot 201 and the width of the second slot 202 range from 3mm 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 slots can meet the requirements of the working frequency of the transmission signal, the external environment, the signal coverage strength in the blind area required by the user and the like. In this embodiment, the first slots 201 and the second slots 202, which are periodically arranged, are arranged in parallel along the length direction of the outer conductor 2, and the first slots 201 and the second slots 202 are orthogonal, for example, the first direction is from left to right along the length direction of the outer conductor 2, the angle between the first slots 201 and the first direction is-45 °, the angle between the second slots 202 and the first direction is 45 °, and the center point of each pair of the first slots 201 and the center point of the second slots 202 form a plane a, which is perpendicular to the horizontal plane B along which the first direction is located, so that not only can the total energy transmitted by the integrally formed leaky coaxial cable assembly be increased, but also the electromagnetic waves radiated in the two insulated cable cores 1 are better orthogonally overlapped in the directions of 45 ° and-45 °, on one hand, the signal interference between the two insulated cable cores 1 can be eliminated, and the coherence gain of the signal can be enhanced, on the other hand, the Multiple Input Multiple Output (MIMO) technology of the 5G transmission system can be fully utilized to realize the spatial multiplexing gain of the signals. In this embodiment, the two insulated cable cores 1 are coated 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 consistently arranged on the same side of the leaky coaxial cable assembly formed integrally, and thus the phase difference between the two components of the electric field vector of the electromagnetic wave radiated by the two insulated cable cores 1 is 90 degrees, and the two components are equal in size. When superimposed elliptically polarized waves (iE)x+jEy) Two resolved mutually perpendicular linearly polarized waves ExAnd EyThe size of the leakage coaxial cable component is close, when the polarization axis ratio (the ratio of the instantaneous maximum value to the minimum value of the radiation field) is less than 3dB, the conversion from elliptical polarization to circular polarization can be realized, and the integrally formed leakage coaxial cable component with the radiation field intensity working in a circular polarization mode can receive and transmit signals in different polarization directions to the maximum extent, so that the signal coverage capability is further enhanced.
As shown in fig. 1 to 2, in the present embodiment, the first slot 201 and the second slot 202 are respectively arranged in the length direction of the outer conductor 2 with a pitch P as a period. The pitch P can be calculated according to the formula of the spatial harmonic generation principle:
wherein: p is the periodic pitch of the first slot or the second slot, C is the propagation speed of light in vacuum, f1The lowest working frequency, epsilon, within the working frequency band range of the leaky coaxial cable component formed integrallyγThe relative dielectric constant of the insulating layer is about 1.22, and simultaneously, in order to inhibit the higher spatial harmonics generated by the leaky coaxial cable component, a series of identical rectangular slotted holes are arranged in the range of the pitch P of the integrally formed leaky coaxial cable component, and the center-to-center distance P of the first slotted hole or the second slotted hole in one periodnCan be calculated according to the following formula; pnP/(2(n +1)), wherein: p is the periodic pitch and n is a positive integer starting from 1, representing the n +1 th spatial harmonic. If the operating frequency range of the leaky coaxial cable assembly is 2500 MHz-3600 MHz, the lowest operating frequency is 2500MHz, and the corresponding wavelength is 120mm, the calculated pitch P is about 57.3 mm. Thus, the pitch P is about one-half the wavelength corresponding to the lowest operating frequency within the operating band of the integrally formed leaky coaxial cable assembly. The center-to-center distances P between the first slot 201 or the second slot 202 adjacent to each other in a series of periodsnThe following were used:
| number of slots in a |
1 | 2 | 3 | 4 |
| Center distance between the slotted holes (mm) | —— | 28.6 | 14.3 | 9.5 |
Therefore, the larger the number of the first slots 201 or the second slots 202 in a single period is, the smaller the center-to-center distance is.
To sum up, the utility model provides an integrated into one piece's leakage coaxial cable subassembly and manufacturing method thereof, realize leakage coaxial cable with the transmission of subassembly form through same outer conductor cladding with two insulation cable cores, can strengthen signal coverage intensity on the one hand, on the other hand has effectively reduced slotted hole quantity on the single leakage coaxial cable outer conductor, the energy that has reduced single leakage coaxial cable reveals and vertical transmission attenuation value, the transmission distance of leakage coaxial cable line subassembly has been improved, thereby reduce the relay equipment cost among the whole cover system, lay earlier stage and later maintenance cost.
Through arranging the first slotted hole and the second slotted hole on the outer conductor to form rectangular slotted holes with an angle of minus 45 degrees and 45 degrees with the first direction respectively and aligning the spatial positions, electromagnetic waves radiated in the integrally formed leaky coaxial cable assembly can be orthogonally superposed, signal interference between two leaky coaxial cables is eliminated, and the coherent gain of signals is enhanced. Meanwhile, the two insulated cable cores adopt insulated cable cores with the same specification, so that the energy intensity of electromagnetic signals transmitted in the integrally formed leaky coaxial cable assembly can be kept uniform and consistent, orthogonal superposition of radiation electromagnetic signals can be realized, circular polarization signal coverage is formed when the polarization axis ratio is smaller than 3dB, and the signal coverage intensity is greatly enhanced.
The outer conductor replaces the traditional copper foil belt with the double-layer copper-plastic composite film, the consumption of the copper material of the outer conductor can be reduced, the production cost is reduced, the mode of longitudinally wrapping the copper-plastic composite film in an integrated mode is adopted for production, the mode of firstly punching a slotted hole on the traditional copper foil belt, then embossing and longitudinally wrapping is replaced, the production of two leakage coaxial cables can be completed at one time, the integrally formed leakage coaxial cable assembly is directly formed, and the production steps are simplified.
The use of integrated into one piece's leaky coaxial cable subassembly has avoided needing two leaky coaxial cable to lay respectively in the tradition, can once the construction lay just solve the installation problem, and integrated into one piece's leaky coaxial cable subassembly's the first slotted hole of outer conductor and second slotted hole position relatively fixed, realized that first slotted hole and second slotted hole are just right with signal coverage area, improved the efficiency of construction, and because the reduction of raw and other materials use, integrated into one piece's leaky coaxial cable subassembly whole weight alleviates, made things convenient for the construction of laying, also practiced thrift the space of laying.
The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. An integrally formed leaky coaxial cable assembly, comprising:
the two insulation cable cores (1) are arranged in parallel along the length direction of the two insulation cable cores (1);
the outer conductor (2) is coated on the two insulated cable cores (1) and forms an integral structure with the two insulated cable cores (1), a plurality of first slotted holes (201) and second slotted holes (202) are formed in the outer surface of the outer conductor (2) along the length direction of the outer conductor (2), the first slotted holes (201) and the second slotted holes (202) are arranged in pairs, and the first slotted holes (201) and the second slotted holes (202) are arranged orthogonally;
a sheath layer (3), wherein the sheath layer (3) is coated on the outer conductor (2).
2. The leaky coaxial cable assembly as claimed in claim 1, wherein said two insulated cores (1) are arranged in a figure "8", and said outer conductor (2) is wrapped around said two insulated cores (1) by means of an integral longitudinal wrapping.
3. The integrally formed leaky coaxial cable assembly as claimed in claim 1, wherein said outer conductor (2) is a double-layer copper-plastic composite film, said double-layer copper-plastic composite film comprising two copper layers (203) and a plastic layer (204), said copper layer (203) having a thickness in a range of 0.1mm to 0.2mm, said plastic layer (204) having a thickness in a range of 0.08mm to 0.2 mm.
4. The leaky coaxial cable assembly as claimed in claim 1, wherein the insulated cable core (1) comprises an inner conductor (101) and an insulating layer (102), the insulating layer (102) being coated outside the inner conductor (101) to isolate the inner conductor (101) from the outer conductor (2).
5. The integrally formed leaky coaxial cable assembly as claimed in claim 1, wherein said first slot (201) and said second slot (202) are rectangular slots periodically arranged with a space between said first slot (201) and said second slot (202).
6. The integrally formed leaky coaxial cable assembly as claimed in claim 5, wherein said first slot (201) and said second slot (202) have a length in a range of 10mm to 35mm and a width in a range of 3mm to 6 mm.
7. The leaky coaxial cable assembly as claimed in claim 5, wherein the first slot (201) and the second slot (202) are located at positions corresponding to positions of the two insulated cores (1), respectively, and the first slot (201) and the second slot (202) are arranged in parallel along a length of the outer conductor (2).
8. The integrally formed leaky coaxial cable assembly according to claim 1, wherein a first direction is a direction from left to right along a length of the outer conductor (2), the first slot (201) is angled at-45 ° with respect to the first direction, and the second slot (202) is angled at 45 ° with respect to the first direction.
9. The integrally formed leaky coaxial cable assembly as claimed in claim 8, wherein a center point of each pair of said first slot (201) and a center point of said second slot (202) form a plane a, said plane a being perpendicular to a horizontal plane B in which said first direction lies.
10. The leaky coaxial cable assembly as claimed in claim 1, wherein said two insulated cable cores (1) are of the same size.
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| CN202023303076.1U CN214124129U (en) | 2020-12-31 | 2020-12-31 | Integrally formed leaky coaxial cable assembly |
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| CN202023303076.1U CN214124129U (en) | 2020-12-31 | 2020-12-31 | Integrally formed leaky coaxial cable assembly |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114696104A (en) * | 2020-12-31 | 2022-07-01 | 江苏俊知技术有限公司 | Leaky coaxial cable assembly suitable for 5G communication and manufacturing method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114696104A (en) * | 2020-12-31 | 2022-07-01 | 江苏俊知技术有限公司 | Leaky coaxial cable assembly suitable for 5G communication and manufacturing method thereof |
| WO2022143346A1 (en) * | 2020-12-31 | 2022-07-07 | 江苏俊知技术有限公司 | Leaky coaxial cable assembly applicable for 5g communication and manufacturing method therefor |
| CN114696104B (en) * | 2020-12-31 | 2024-03-26 | 江苏俊知技术有限公司 | Leaky coaxial cable assembly suitable for 5G communication and manufacturing method thereof |
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