CN108390155B - Wide-angle radiation type leaky coaxial cable - Google Patents
Wide-angle radiation type leaky coaxial cable Download PDFInfo
- Publication number
- CN108390155B CN108390155B CN201810317630.XA CN201810317630A CN108390155B CN 108390155 B CN108390155 B CN 108390155B CN 201810317630 A CN201810317630 A CN 201810317630A CN 108390155 B CN108390155 B CN 108390155B
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- Prior art keywords
- coaxial cable
- gap
- wide
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- array
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- 230000005855 radiation Effects 0.000 title claims abstract description 34
- 239000004020 conductor Substances 0.000 claims abstract description 31
- 230000004992 fission Effects 0.000 claims 1
- 230000008878 coupling Effects 0.000 abstract description 6
- 238000010168 coupling process Methods 0.000 abstract description 6
- 238000005859 coupling reaction Methods 0.000 abstract description 6
- 238000004891 communication Methods 0.000 abstract description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
Classifications
-
- 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
- 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
Landscapes
- Waveguide Aerials (AREA)
Abstract
The invention relates to a wide-angle radiation type leaky coaxial cable which is suitable for wireless communication systems of tunnels, mines, subways, tunnels and other narrow spaces, high-speed trains and indoor buildings. The utility model provides a wide angle radiation type leakage coaxial cable which characterized in that: the device consists of an inner conductor, an insulating layer, a punched outer conductor and an outer sheath from inside to outside; the outer part of the inner conductor is coated with an insulating layer, the punched outer conductor is tightly coated on the outer part of the insulating layer, and the punched outer conductor is extruded with an outer sheath; the outer conductor is uniformly provided with a plurality of identical gap array groups at intervals along the axis direction of the cable. The gap array is formed by splitting an original single slot hole into two or even a plurality of gap units, and the increase of the leaky cable radiating units can enlarge the radial radiating angle of the leaky cable and reduce the coupling loss of the leaky cable.
Description
Technical Field
The invention relates to a wide-angle radiation type leaky coaxial cable (hereinafter referred to as leaky coaxial cable), which is suitable for wireless communication systems of tunnels, mines, subways, tunnels and other narrow spaces, high-speed trains and indoor buildings.
Background
The leaky coaxial cable has both radiation and transmission functions, and radiates outwards by utilizing the slit on the outer conductor of the coaxial cable and performs wireless communication with the external space. The wireless communication system has the advantages of uniform signal coverage, easiness in installation and the like, is widely applied to narrow spaces such as tunnels, mines, subways, tunnels and the like, and has very broad development prospect in wireless communication systems of high-speed trains and indoor buildings.
When the indoor wireless coverage is carried out, as the indoor environment is complex, the signal coverage is required to be uniform and no dead angle exists, and therefore, a larger radial radiation angle of the leaky cable is required to ensure that the signal coverage is wider so as to eliminate the dead angle of the signal. The radial radiation angle of the existing leaky coaxial cable, such as splayed slot leaky cable, rectangular slot leaky cable, U-shaped slot leaky cable, V-shaped slot leaky cable and the like, is smaller and is about 70-80 degrees, and the effect of enlarging the radial radiation angle of the leaky coaxial cable is limited only by increasing the length of the leaky cable slot hole, so that the requirement of wide-angle coverage of indoor division (indoor coverage system) to eliminate signal dead angles cannot be met.
Disclosure of Invention
The invention aims to provide a wide-angle radiation type leaky coaxial cable aiming at the defects, and adopts a distributed leaky mode to realize wide-angle radiation, wherein the radial radiation angle of the wide-angle radiation type leaky coaxial cable reaches more than 170 degrees. The leakage mode is composed of a fissile gap array group, and the radial radiation angle of a leakage cable can be enlarged and the coupling loss of the leakage cable can be reduced by increasing the gap radiation units of the leakage cable and the whole length of the gap array, so that the coverage range and uniformity of a leakage cable signal are enlarged. The fissile gap array set can be applied to splayed grooves, rectangular grooves and V-shaped grooves of a leaky cable.
The invention is realized by adopting the following technical scheme:
the wide-angle radiation leaky coaxial cable consists of an inner conductor, an insulating layer, a punched outer conductor and an outer sheath from inside to outside. The outer part of the inner conductor is coated with an insulating layer, the punched outer conductor is tightly coated on the outer part of the insulating layer, and the punched outer conductor is extruded with an outer sheath.
A plurality of identical gap array groups are uniformly arranged on the punched outer conductor at intervals along the axial direction of the cable;
The gap array of the gap array group is formed by splitting an original single slot hole into two or more gap units, the length of the gap array is larger than that of the original single slot hole, and the radial radiation angle of a leakage cable can be enlarged and the coupling loss of the leakage cable can be reduced by increasing the length of the leakage cable gap radiation unit and the whole length of the gap array, so that the coverage range and uniformity of a leakage cable signal are enlarged.
The fissile slot element length is less than a quarter wavelength of the corresponding highest frequency of use, which avoids that the length of the radiating slot at high frequencies is comparable to the wavelength of the corresponding frequency, thereby reducing attenuation.
The lengths of the gap units of the same gap array can be designed uniformly according to the same frequency, and the lengths of different gap units can be designed specifically aiming at different frequency points.
The gap units of the same gap array can slightly deviate near the same axis, and the deviation distance is 0-6 mm, so that signals can be uniformly covered along the axial direction of the leakage cable. The interval of the gap units is preferably 2-6 mm, so that the processing requirement can be met, and the situation that signal coverage of an interval area is weak due to too far interval of the radiation units can be avoided.
The fissile gap array set can be applied to splayed grooves, rectangular grooves and V-shaped grooves of a leaky cable.
Compared with the existing leaky cable groove type, the wide-angle radiation type leaky coaxial cable has the advantages that the wide-angle radiation is realized by adopting a distributed leaky mode, and the radial radiation angle of the wide-angle radiation type leaky coaxial cable is more than 170 degrees. The radial radiation angle of the leaky cable can be enlarged and the coupling loss of the leaky cable can be reduced by increasing the leaky cable slot radiation unit and increasing the whole length of the slot array, so that the coverage range and uniformity of leaky cable signals are enlarged. The special design of the fissile slot unit length avoids that the length of the radiating slot at high frequencies is comparable to the wavelength of the corresponding frequency, thus reducing attenuation. The slot unit length of the same slot array can change the design according to different requirements. And the gap units of the same gap array enable signals to be uniformly covered along the axial direction of the leaky cable through the offset nearby the same axis. By designing the spacing of the slit elements, this can both meet the processing requirements and avoid the signal coverage of the spacing region being weak due to the radiation elements being spaced too far apart. The fissile gap array group can be widely applied to various leaky cable groove types.
Drawings
The invention will be further described with reference to the accompanying drawings in which:
FIG. 1 is a schematic diagram of a wide angle radiating leaky coaxial cable;
fig. 2 is a schematic diagram of a splayed slot configuration of a leaky coaxial cable as is currently common;
Fig. 3 is a schematic diagram of a split slot array set for a wide angle radiation type leaky coaxial cable.
In the figure: 1. the insulation layer comprises an inner conductor, 2, an insulation layer, 3, a punched outer conductor, 4, an outer sheath, 5, a single slot hole, 6, a slot unit, 7, a slot array, L1, a single slot hole length, L2, a slot array length, L, a slot unit length, d, a slot unit interval, d1 and an offset distance.
Detailed Description
Referring to fig. 1-3, a wide-angle radiation type leaky coaxial cable is composed of an inner conductor 1, an insulating layer 2, a punched outer conductor 3 and an outer sheath 4 from inside to outside. The outer part of the inner conductor 1 is coated with an insulating layer 2, the punched outer conductor 3 is tightly coated on the outer part of the insulating layer 2, and the punched outer conductor 3 is extruded with an outer sheath 4.
A plurality of identical gap array groups are uniformly arranged on the punched outer conductor 3 at intervals along the axial direction of the cable; the group of the slit array is not less than one group.
The slot array 7 is formed by splitting the original single slot hole 5 into two or more slot units 6, the length L2 of the slot array 7 is larger than the length L1 of the original single slot hole 5, and the radial radiation angle of the leaky cable can be enlarged and the coupling loss of the leaky cable can be reduced by increasing the length of the leaky cable radiation unit and the length of the slot array, so that the coverage range and uniformity of leaky cable signals are enlarged.
The length l of the individual slot units 6 is smaller than a quarter wavelength of the corresponding highest frequency of use, which makes it possible to avoid that the length of the radiation slot at high frequencies is comparable to the wavelength of the corresponding frequency, thus reducing attenuation.
The lengths of the slit units of the same slit array can be designed uniformly according to the same frequency, and the lengths of the slit units can be designed differently according to different frequency points.
The slit units 6 of the same slit array can slightly deviate near the same axis, and the deviation distance d1 is 0-6 mm, so that signals can be uniformly covered along the axial direction of the leaky cable.
The distance d between the slit units 6 should be preferably 2-6 mm, which can meet the processing requirement and avoid weak signal coverage of the interval area caused by too far interval of the radiation units.
The fissile gap array group can be applied to splayed grooves, rectangular grooves and V-shaped grooves of the leaky cable, and the performances of radial radiation angle, transmission loss, coupling loss and the like of the leaky cable are greatly improved.
The inner conductor 1 is a copper conductor, a copper-clad aluminum or an aluminum conductor.
The insulating layer 2 is made of foamed polyethylene or FEP.
The punched outer conductor 3 adopts a copper belt or an aluminum belt.
The outer sheath 4 is made of polyethylene or flame-retardant polyolefin.
Claims (5)
1. The utility model provides a wide angle radiation type leakage coaxial cable which characterized in that: the device consists of an inner conductor, an insulating layer, a punched outer conductor and an outer sheath from inside to outside; the outer part of the inner conductor is coated with an insulating layer, the punched outer conductor is tightly coated on the outer part of the insulating layer, and the punched outer conductor is extruded with an outer sheath;
A plurality of identical gap array groups are uniformly arranged on the punched outer conductor at intervals along the axial direction of the cable; the gap array of the gap array group is formed by splitting an original single-slot hole into two or more gap units, and the gap units of the same gap array can deviate near the same axis; the extending direction of the same axis is crossed with the axial direction of the leaky coaxial cable, and projections of the slit units of the same slit array on the same axis are mutually arranged at intervals;
the length of the gap array is longer than that of the original single slot hole;
The slot unit length is less than a quarter wavelength corresponding to the highest frequency of use.
2. The wide-angle radiating leaky coaxial cable according to claim 1, wherein: the lengths of the slit units of the same slit array can be designed uniformly according to the same frequency, and the lengths of the slit units can be designed differently according to different frequency points.
3. The wide-angle radiating leaky coaxial cable according to claim 1, wherein: the offset distance of the slit units of the same slit array near the same axis is 0-6 mm.
4. The wide-angle radiating leaky coaxial cable according to claim 1, wherein: the interval between the adjacent gap units of the same gap array is 2-6 mm.
5. The wide-angle radiating leaky coaxial cable according to claim 1, wherein: the single slot hole fission mode is suitable for the cable leakage slot type of splayed slots, rectangular slots and V-shaped slots.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810317630.XA CN108390155B (en) | 2018-04-10 | 2018-04-10 | Wide-angle radiation type leaky coaxial cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810317630.XA CN108390155B (en) | 2018-04-10 | 2018-04-10 | Wide-angle radiation type leaky coaxial cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108390155A CN108390155A (en) | 2018-08-10 |
| CN108390155B true CN108390155B (en) | 2024-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810317630.XA Active CN108390155B (en) | 2018-04-10 | 2018-04-10 | Wide-angle radiation type leaky coaxial cable |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3890114A4 (en) * | 2018-11-23 | 2022-06-22 | Zhongtian Radio Frequency Cable Co., Ltd | Wide-angle radiation leaky coaxial cable |
| CN110707430A (en) * | 2019-08-20 | 2020-01-17 | 江苏亨鑫科技有限公司 | Wide high-frequency leaky cable |
| WO2022081155A1 (en) * | 2020-10-15 | 2022-04-21 | Hewlett-Packard Development Company, L.P. | Rotatable antennas |
| CN113471707B (en) * | 2021-07-26 | 2023-07-21 | 江苏亨鑫科技有限公司 | Ultra-wideband leakage coaxial cable designed by array source |
| CN114094294B (en) * | 2021-11-19 | 2023-12-08 | 中国电信股份有限公司 | Leaky cable |
| CN115798811B (en) * | 2022-12-13 | 2023-10-27 | 长飞光纤光缆股份有限公司 | Low-loss horizontal polarization leaky cable compatible with 2G to 5G signals |
| CN116666984B (en) * | 2023-07-31 | 2023-10-31 | 中天射频电缆有限公司 | leaky cable |
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