CN112736476B - High-gain leaky-wave cable for indoor distribution - Google Patents
High-gain leaky-wave cable for indoor distribution Download PDFInfo
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- CN112736476B CN112736476B CN202011308826.6A CN202011308826A CN112736476B CN 112736476 B CN112736476 B CN 112736476B CN 202011308826 A CN202011308826 A CN 202011308826A CN 112736476 B CN112736476 B CN 112736476B
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- leaky
- wave cable
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- insulating layer
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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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
- H01Q13/22—Longitudinal slot in boundary wall of waveguide or transmission line
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/08—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a rectilinear path
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Abstract
The embodiment of the disclosure provides a high-gain leaky-wave cable for indoor distribution, belongs to the field of communication equipment, and aims to solve the problem that in the related art, a leaky-wave cable radiates signals to the external space from a slotted hole, and the signal strength is weak. The high-gain leaky-wave cable for the indoor division comprises an inner conductor, a first insulating layer, an outer conductor and a radiation array structure, wherein the first insulating layer is sleeved on the outer side of the inner conductor, the outer conductor is sleeved on the outer side of the first insulating layer, and the radiation array structure is arranged on the outer wall of the outer conductor; the outer conductor is provided with a transmission slot hole, a probe penetrates through the transmission slot hole, and the probe is electrically connected with the radiation array structure. The signal in the leaky wave cable no longer through the transmission slotted hole on the outer conductor outwards radiation, but by the probe transmission to the radiation array substructure on, through radiation array substructure exterior space radiation for signal strength is stronger. The antenna structure is arranged on the outer wall of the outer conductor, so that the structure of the leaky-wave cable is more compact on the basis of increasing the signal intensity of the leaky-wave cable.
Description
Technical Field
The embodiment of the disclosure relates to the field of communication equipment, in particular to a high-gain leaky-wave cable for indoor distribution.
Background
The leaky-wave cable can leak signals transmitted in the cable to the outside of the cable, and can also enable radio signals outside the cable to be coupled into the cable. Therefore, leaky-wave cables are widely used in spaces with poor electromagnetic wave propagation effects, such as tunnels, galleries, underground railways and the like, so as to realize communication with the outside.
In the related art, a leaky-wave cable includes an inner conductor, an insulating layer, and an outer conductor, which are sequentially sleeved from inside to outside. The inner and outer conductors are connected to a signal source for transmitting signals from the signal source. Meanwhile, a plurality of slotted holes are formed in the outer conductor at intervals along the axial direction of the leaky-wave cable, so that signals transmitted in the inner conductor are radiated to the outer space through the slotted holes. The insulating layer is positioned between the inner conductor and the outer conductor and used for isolating the inner conductor from the outer conductor.
However, the signal radiated from the slot to the external space has a weak signal strength.
Disclosure of Invention
The embodiment of the disclosure provides a high-gain leaky-wave cable for indoor distribution, which is used for solving the problem that the signal strength of a signal radiated to an external space from a slotted hole of the leaky-wave cable in the related art is weak.
The embodiment of the disclosure provides a high-gain leaky-wave cable for indoor distribution, which comprises an inner conductor, a first insulating layer, an outer conductor and a radiation array structure, wherein the first insulating layer is sleeved on the outer side of the inner conductor, the outer conductor is sleeved on the outer side of the first insulating layer, and the radiation array structure is arranged on the outer wall of the outer conductor; the outer conductor is provided with a transmission slot hole, a probe penetrates through the transmission slot hole, and the probe is electrically connected with the radiation array structure.
Optionally, a portion of the probe is inserted into the first insulating layer, and a first predetermined distance is provided between the probe end and the inner conductor.
Optionally, the probe includes a first section and a second section, the first section is inserted into the first insulating layer, the second section is located in the slot, and a second predetermined distance is provided between a side wall of the second section and a side wall of the transmission slot.
Optionally, the radiating array structure comprises a second insulating layer attached to the outer wall of the outer conductor, a conductor patch attached to the insulating layer, and a feeder line connected to the conductor patch, and the feeder line is connected to the probe.
Optionally, the number of the radiating array substructure is multiple, the multiple radiating array substructures are arranged at intervals along the radial line or axial line direction of the leaky wave cable, and the conductor patch of each radiating array substructure is connected with the probe through the feeder line.
Optionally, each of the conductor patches includes a plurality of conductive sheets attached to the second insulating layer, and each of the conductive sheets is connected to the feeder line.
Optionally, the feed line comprises a multi-level feed line.
Optionally, the conductor patch is of unitary construction with the feed line.
Optionally, the number of the transmission slots is multiple, and the multiple transmission slots are arranged at intervals along the central line direction of the leaky-wave cable.
Optionally, the leaky wave cable further comprises an outer sheath, and the outer sheath covers the outer side of the radiating array structure.
The high-gain leaky-wave cable for the indoor distribution comprises an inner conductor, a first insulating layer, an outer conductor and a radiating array structure, wherein the first insulating layer is sleeved on the outer side of the inner conductor, the outer conductor is sleeved on the outer side of the first insulating layer, and the radiating array structure is arranged on the outer wall of the outer conductor; the outer conductor is provided with a transmission slot hole, a probe penetrates through the transmission slot hole, and the probe is electrically connected with the radiation array structure. The signal in the leaky wave cable no longer through the transmission slotted hole external radiation on the outer conductor, but by the probe transmission to the radiation array substructure on, through radiation array substructure exterior space radiation, compare by the transmission slotted hole external radiation by the signal intensity of the radiation array substructure external radiation stronger. And, set up the radiating array substructure on the outer wall of outer conductor, can make the structure of leaky-wave cable compacter on the basis of increasing leaky-wave cable signal intensity.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a high-gain leaky-wave cable for indoor use according to an embodiment of the present disclosure;
fig. 2 is a cross-sectional view of a high-gain leaky-wave cable for indoor use provided by an embodiment of the present disclosure;
fig. 3 is a schematic partial structural diagram of a high-gain leaky-wave cable for indoor use according to an embodiment of the disclosure;
fig. 4 is a schematic structural diagram of a part of a high-gain leaky-wave cable for indoor use according to an embodiment of the disclosure.
Description of reference numerals:
10-an inner conductor;
20-a first insulating layer;
30-an outer conductor;
31-transmission slot;
40-a second insulating layer;
50-a radiating array structure;
51-a conductor patch;
52-a second feed line;
53-a first feed line;
60-an outer sheath;
70-Probe.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be described clearly and completely with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are some embodiments, not all embodiments. All other embodiments that can be derived by a person of ordinary skill in the art based on the embodiments of the present disclosure without making creative efforts shall fall within the protection scope of the embodiments of the present disclosure. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
The leaky-wave cable can leak signals transmitted in the cable to the outside of the cable, and can also enable radio signals outside the cable to be coupled into the cable. Therefore, leaky-wave cables are widely used in spaces with poor electromagnetic wave propagation effects, such as tunnels, galleries, underground railways and the like, so as to realize communication with the outside.
In the related art, a leaky-wave cable includes an inner conductor, an insulating layer, and an outer conductor, which are sequentially sleeved from inside to outside. The inner and outer conductors are connected to a signal source for transmitting signals from the signal source. Meanwhile, a plurality of slotted holes are formed in the outer conductor at intervals along the axial direction of the leaky-wave cable, so that signals transmitted in the inner conductor are radiated to the outer space through the slotted holes. The insulating layer is positioned between the inner conductor and the outer conductor and used for isolating the inner conductor from the outer conductor.
However, the signal intensity of the signal radiated from the slot to the external space is small.
In view of this, the embodiments of the present disclosure provide a high-gain leaky-wave cable for indoor distribution, in which a radiation array structure is disposed outside an outer conductor, and electromagnetic waves are radiated to an external space through the radiation array structure, so that signal strength is improved.
The high-gain leaky-wave cable for indoor use provided by the embodiments of the present disclosure is described in detail below with reference to the accompanying drawings.
As shown in fig. 1 to 4, the present disclosure provides an indoor high-gain leaky wave cable, which includes an inner conductor 10, a first insulating layer 20, an outer conductor 30, and a radiating array structure 50. Wherein the inner conductor 10 and the outer conductor 30 are connected to a signal source for receiving and transmitting signals from the signal source. The outer conductor 30 is provided with a transmission slot 31 at a specific position so that the signal is radiated from the transmission slot 31, and the other part of the outer conductor 30 except the transmission slot 31 is sleeved outside the inner conductor 10 for shielding the signal to prevent the signal from leaking from the other part of the outer conductor 30. The first insulating layer 20 is located between the outer conductor 30 and the inner conductor 10 to insulate the inner conductor 10 from the outer conductor 30.
A probe 70 is inserted into the transmission slot 31, and the probe 70 is used for transmitting the signal radiated between the inner conductor 10 and the outer conductor 30. The radiating array substructure 50 is disposed on the outer wall of the outer conductor 30, and the probe 70 is electrically connected to the radiating array substructure 50, so that a signal received by the probe 70 is transmitted to the radiating array substructure 50 and radiated to the external space through the radiating array substructure 50.
The high-gain leaky-wave cable for the indoor division provided by the embodiment of the disclosure comprises an inner conductor 10, a first insulating layer 20, an outer conductor 30 and a radiation array structure 50, wherein the first insulating layer 20 is sleeved outside the inner conductor 10, the outer conductor 30 is sleeved outside the first insulating layer 20, and the radiation array structure 50 is arranged on the outer wall of the outer conductor 30; the outer conductor 30 is provided with a transmission slot 31, a probe 70 penetrates through the transmission slot 31, and the probe 70 is electrically connected with the radiation array structure 50. The signal in the leaky wave cable no longer radiates outwards through the transmission slot 31 on the outer conductor 30, but is transmitted to the radiation array substructure 50 by the probe 70, and radiates through the external space of the radiation array substructure 50, and compared with the signal radiated outwards through the transmission slot 31, the signal radiated outwards by the radiation array substructure 50 increases the signal strength. Moreover, the radiation array substructure 50 is arranged on the outer wall of the outer conductor 30, so that the structure of the leaky-wave cable can be more compact on the basis of increasing the signal intensity of the leaky-wave cable.
The radiating array structure 50 may have various forms, and may be a radiating array or a surface radiating array (for example, a microstrip radiating array), and may be flexibly selected according to an application scenario in specific applications. When the radiating array structure 50 is a microstrip radiating array, the existing structure of the leaky-wave cable can be used as a part of the microstrip radiating array for saving materials and reducing the diameter of the section of the leaky-wave radiating array.
Optionally, the radiating array sub-structure 50 comprises a second insulating layer 40 attached to the outer wall of the outer conductor 30, a conductor patch 51 attached to the insulating layer, and a feed line connected to the conductor patch 51, the feed line being connected to the probe 70. The outer conductor 30, the second insulating layer 40 and the conductor patch 51 which are stacked together form a microstrip radiating array structure. This saves material while reducing the cross-sectional diameter of the leaky wave cable. Preferably, the second insulating layer 40 is made of a polarizable insulating material, such as a ferrite material, although the second insulating layer 40 may also be made of a ceramic material. The conductor patches 51 and the outer conductor 30 may be made of a metallic material, such as copper, aluminum, or the like. In operation, the conductor patches 51 receive electromagnetic signals from the probe and radiate the signals outwardly. In addition, the radiating array structure 50 may also include two metal plates of the microstrip radiating array and a dielectric sandwiched between the two metal plates, and an insulating layer is disposed between the outer conductor 30 and the microstrip radiating array.
Wherein the feed line is a quarter-physical wavelength impedance converter, which can make the input impedance of the radiating array substructure well matched with the feed end, and can adjust the phase of the conductor patch 51 of the radiating array substructure 50.
Optionally, the radiating array substructure 50 is multiple, the multiple radiating array substructures 50 are arranged at intervals along the radial line or axial line direction of the leaky wave cable, and the conductor patch 51 of each radiating array substructure 50 is connected with the probe 70 through the feeder line. The radiation array sub-structures 50 are arranged at intervals along the axial direction of the leaky-wave cable, so that the intensity of the radiation signals of the leaky-wave cable is further increased. Illustratively, as shown in fig. 4, the probes 70 are connected to four radiating array substructures 50 by feed lines. Of course, the number of radiating array sub-structures 50 connected to the probe 70 can be two, six, eight, etc.
Alternatively, each of the conductor patches 51 includes a plurality of conductive sheets attached to the second insulating layer 40, and each of the conductive sheets is connected to a feeder line. Signals are radiated outwards through the conducting strips, so that the radiation effect of the signals is better. Illustratively, each probe 70 is connected to four conductor patches 51, each conductor patch 51 comprising four conductive strips, forming a 4 x 1 array of radiating elements. Of course, the number of conductive strips included in the conductor patch 51 may also be two, six, eight, etc.
Optionally, the feed line comprises a multi-level feed line. Illustratively, the feeder line includes two U-shaped first feeder lines 53 and one U-shaped second feeder line 52, adjacent two conductor patches 51 are connected by one first feeder line 53, the two first feeder lines 53 are connected by the second feeder line 52, and the feeder lines are symmetrically arranged with respect to the probe 70.
Optionally, the conductor patch 51 is integrated with the power feed line to reduce the resistance between the conductor patch and the power feed line and enhance the reliability of the connection.
Optionally, a portion of the probe 70 is inserted into the first insulating layer 20, and the end of the probe 70 has a first predetermined distance from the inner conductor 10. This reduces the distance between the probe 70 and the inner conductor 10, improves the coupling of the probe 70, and prevents the probe 70 from being directly connected to the inner conductor 10. On the other hand, the insertion of a portion of the probe 70 into the first insulating layer 20 provides a better fixing effect of the probe 70. The first predetermined distance may be determined according to theoretical calculation or experiments, which is not limited in this disclosure.
Optionally, the probe 70 comprises a first section and a second section, the first section being inserted in the first insulating layer 20, the second section being located in the slot with a second predetermined distance between the side wall of the second section and the side wall of the transmission slot 31. The probe 70 and the transmission slot 31 are arranged at intervals, so that the probe 70 is prevented from contacting with the outer conductor 30 and failing. The second predetermined distance may be determined according to theoretical calculation or experiments, which is not limited in this disclosure. Of course, the ends of the probes 70 may be inserted into the transmission slots 31 without being inserted into the insulating layer.
Alternatively, the transmission slot 31 is plural, and the plural transmission slots 31 are arranged at intervals along the central line direction of the leaky wave cable. Accordingly, the probe 70 and the radiation array substructure 50 connected with the probe 70 can be arranged in each transmission slot 31, or the probe 70 and the radiation array substructure 50 connected with the probe 70 can be arranged in only part of the transmission slots 31. The plurality of transmission slots 31 are formed along the axial direction of the leaky-wave cable, so that the signal intensity of the leaky-wave cable along the axial direction is higher. Illustratively, when the leaky-wave cable is a low-loss leaky cable, different transmission slots 31 are formed along the axial direction.
Optionally, the leaky wave cable further comprises an outer sheath 60, and the outer sheath 60 covers the outer side of the radiating array sub-structure 50. The outer sheath 60 is sleeved outside the radiation array structure 50, so that the radiation array structure 50 can be protected, and the radiation array structure 50 is prevented from being damaged mechanically.
In the embodiments of the present disclosure, unless explicitly stated otherwise, the terms "mounting," "connecting," "fixing," and the like are to be understood broadly, and for example, may be a fixed connection, a detachable connection, or an integral molding, and may be a mechanical connection, an electrical connection, or a communication with each other; they may be directly connected or indirectly connected through an intermediate medium, or they may be connected internally or in any other manner known to those skilled in the art, unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the embodiments of the present disclosure, and not for limiting the same; although embodiments of the present disclosure have been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present disclosure.
Claims (10)
1. A high-gain leaky-wave cable for indoor distribution is characterized by comprising an inner conductor, a first insulating layer, an outer conductor and a radiating array structure, wherein the first insulating layer is sleeved on the outer side of the inner conductor, the outer conductor is sleeved on the outer side of the first insulating layer, and the radiating array structure is arranged on the outer wall of the outer conductor; the outer conductor is provided with a transmission slot hole, a probe penetrates through the transmission slot hole and is electrically connected with the radiation array substructure, so that signals received by the probe are transmitted to the radiation array substructure, and electromagnetic waves are radiated to an external space through the radiation array substructure.
2. The indoor high-gain leaky wave cable as claimed in claim 1, wherein a portion of said probe is inserted into said first insulating layer with a first predetermined distance between a tip of said probe and said inner conductor.
3. The indoor high-gain leaky-wave cable as claimed in claim 2, wherein said probe includes a first section and a second section, said first section being inserted in said first insulating layer, said second section being located in said slot, and a side wall of said second section being spaced from a side wall of said transmission slot by a second predetermined distance.
4. The indoor distribution high-gain leaky wave cable as claimed in claim 1, wherein said radiating array structure includes a second insulating layer attached to an outer wall of said outer conductor, a conductor patch attached to the insulating layer, and a feeder line connected to said conductor patch, said feeder line being connected to said probe.
5. The indoor high-gain leaky-wave cable as claimed in claim 4, wherein said radiating array substructure is plural, and plural radiating array substructures are arranged at intervals along radial lines or axial directions of said leaky-wave cable, and the conductor patch of each radiating array substructure is connected to said probe through said feeder line.
6. The indoor distribution high-gain leaky-wave cable as claimed in claim 5, wherein each of said conductor patches includes a plurality of conductive pieces attached to said second insulating layer, each of said conductive pieces being connected to said feeder line.
7. The indoor distribution high gain leaky wave cable as claimed in claim 5, wherein said feeder line includes a multi-stage feeder line.
8. The indoor distribution high gain leaky wave cable as claimed in claim 7, wherein said conductor patches are of an integral structure with said feeder line.
9. The indoor high-gain leaky-wave cable as claimed in any one of claims 4 to 8, wherein said transmission slot is plural, and plural transmission slots are provided at intervals along an axial direction of said leaky-wave cable.
10. The indoor distribution high-gain leaky-wave cable as claimed in claim 1, further comprising an outer sheath covering an outer side of said radiating array structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011308826.6A CN112736476B (en) | 2020-11-19 | 2020-11-19 | High-gain leaky-wave cable for indoor distribution |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011308826.6A CN112736476B (en) | 2020-11-19 | 2020-11-19 | High-gain leaky-wave cable for indoor distribution |
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| CN112736476A CN112736476A (en) | 2021-04-30 |
| CN112736476B true CN112736476B (en) | 2022-03-01 |
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| CA2239642C (en) * | 1997-06-26 | 2001-05-29 | Geza Dienes | Antenna for radiating cable-to-vehicle communication systems |
| WO2006086611A2 (en) * | 2005-02-11 | 2006-08-17 | Radatec, Inc. | Microstrip patch antenna for high temperature environments |
| CN201112009Y (en) * | 2007-09-13 | 2008-09-10 | 焦作铁路电缆工厂 | Radiating type leaky coaxial cable |
| KR101043855B1 (en) * | 2009-01-13 | 2011-06-22 | 엘에스전선 주식회사 | Cable-type broadband antenna system |
| CN201503903U (en) * | 2009-08-07 | 2010-06-09 | 江苏东强股份有限公司 | High-property radiation type leakage coaxial cable |
| CN101728645B (en) * | 2009-12-25 | 2014-04-02 | 山东科技大学 | Dual-polarization omnidirectional antenna |
| CN202019044U (en) * | 2011-05-13 | 2011-10-26 | 冯嵩 | Hole-slot type variable-coupling self-equalized power leakage coaxial cable |
| US9287614B2 (en) * | 2011-08-31 | 2016-03-15 | The Regents Of The University Of Michigan | Micromachined millimeter-wave frequency scanning array |
| CN203800150U (en) * | 2014-01-22 | 2014-08-27 | 天津亨特尔线缆有限公司 | Safety prevention, monitoring and early warning leaky coaxial cable |
| JP2015185323A (en) * | 2014-03-24 | 2015-10-22 | 日立金属株式会社 | probe cable and harness using the same |
| CN104183917B (en) * | 2014-08-26 | 2017-03-22 | 南京濠暻通讯科技有限公司 | Probe side-fed microstrip antenna |
| CN204391232U (en) * | 2015-01-08 | 2015-06-10 | 中国电子科技集团公司第二十三研究所 | A kind of high-power wideband waveguide cable assembly |
| CN208028215U (en) * | 2018-04-10 | 2018-10-30 | 中天射频电缆有限公司 | A kind of wide-angle radial leak coaxial cable |
| CN109286066A (en) * | 2018-08-28 | 2019-01-29 | 南京邮电大学 | A kind of leaky-wave antenna of Stepped Impedance composite left-and-right-hand structure |
| CN111029698A (en) * | 2019-12-12 | 2020-04-17 | 安徽联嘉祥特种电缆有限公司 | Coaxial leaky cable for 5G signal transmission |
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2020
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