WO2022165910A1 - 一种宽波束辐射漏泄同轴电缆 - Google Patents

一种宽波束辐射漏泄同轴电缆 Download PDF

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Publication number
WO2022165910A1
WO2022165910A1 PCT/CN2021/079562 CN2021079562W WO2022165910A1 WO 2022165910 A1 WO2022165910 A1 WO 2022165910A1 CN 2021079562 W CN2021079562 W CN 2021079562W WO 2022165910 A1 WO2022165910 A1 WO 2022165910A1
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Prior art keywords
slot
outer conductor
slotted hole
coaxial cable
wide
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PCT/CN2021/079562
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English (en)
French (fr)
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宋海燕
刘中华
沈江华
王惠兵
吴超
徐学孜
周祎
吕岑佳
王凌峰
李元景
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江苏亨鑫科技有限公司
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Application filed by 江苏亨鑫科技有限公司 filed Critical 江苏亨鑫科技有限公司
Priority to US17/768,752 priority Critical patent/US20240014567A1/en
Publication of WO2022165910A1 publication Critical patent/WO2022165910A1/zh

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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
    • 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
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome

Definitions

  • the present invention relates to a leaky coaxial cable technology, in particular to a wide beam radiation leaky coaxial cable.
  • leaky cables are becoming more and more diverse like antennas, and the application fields of leaky cables are constantly expanding.
  • 5G indoor coverage industrial Internet of Things and other fields
  • wireless coverage leaky cable solutions High stability and reliability are more and more favored by people.
  • the consistency of the leaky cable laying direction is also difficult to ensure. , if it is not considered to increase the lateral lobe angle of the leaky cable, it will seriously affect the actual coverage effect.
  • patent CN201820503050.5 discloses a wide-beam radiation leaky coaxial cable.
  • the original single slot hole is split into two or more slot units.
  • this structure is still a slight deformation of a single radiation source in essence, and the distance between each group of slot units cannot be too far, otherwise, the signal coverage in the interval area will be weak, so it cannot meet the requirement of greatly increasing the radiation coverage.
  • An object of the present invention is to provide a wide beam radiation leaky coaxial cable capable of increasing the width of the transverse radiation lobe.
  • the slot opening parameters of the slot groups in each row of the wide beam radiation leakage coaxial cable are completely consistent.
  • the slot hole of the wide beam radiation leakage coaxial cable is a slotted slot, a slotted eight slot, a U-shaped slot, an L-shaped slot, a T-shaped slot, an E-shaped slot or a triangular slot.
  • the slot hole of the wide beam radiation leakage coaxial cable is a U-shaped slot or a figure-eight slot, and the centers of two adjacent slot holes along the axis direction of the outer conductor are symmetrically arranged, and the circumference of the outer conductor is symmetrical.
  • the two adjacent rows of slot hole groups in the direction can be completely overlapped after being rotated by an angle ⁇ around the axis of the outer conductor.
  • the slot group at the middle position coincides with the center line of the narrow side of the outer conductor.
  • the beneficial effect of the embodiment of the present invention is: by increasing the number of slot holes and distributing the slot groups at different angles in the circumferential direction of the outer conductor, the leaky cable can increase all frequency points (especially higher frequencies) in the working frequency band. frequency) radiation lobe width, which makes the radiation lobe width of the leaky cable wider, so that the leaky cable has stronger applicability to application scenarios, and solves the problem that when the leaky cable is used in the room number distribution system, it is difficult to ensure that the radiation direction of the leaky cable is consistent with the The consistent laying direction causes some weak coverage problems, making the leaky cable more suitable for indoor scenarios.
  • Fig. 1 is the three-dimensional structure schematic diagram of the embodiment of the present invention.
  • FIG. 2 is a schematic diagram of the development of an outer conductor according to an embodiment of the present invention (the slot is a character-eight slot);
  • FIG 3 is a schematic diagram of the development of the outer conductor according to the embodiment of the present invention (the slot is a slot);
  • the slot is a U-shaped slot
  • FIG. 5 is a schematic cross-sectional view of an embodiment of the present invention.
  • the present invention provides a wide-beam radiation leaky coaxial cable, including an inner conductor 1 , an insulating layer 2 , an outer conductor 3 and a sheath 4 that are coaxially nested in sequence from the inside to the outside.
  • each row of slotted hole groups 31 includes a plurality of slotted hole arrays 32 arranged periodically along the axial direction of the outer conductor, and each slotted hole group includes a plurality of slotted hole arrays arranged periodically along the axial direction of the outer conductor.
  • the pitch P of each row of slot hole groups 31 is the same, the pitch phase of each row of slot hole groups 31 on the same leaky cable section is completely consistent, and each slot hole array 32 includes a plurality of slot holes 33 .
  • the leaky cable can increase the radiation waves at all frequencies (especially higher frequencies) in the working frequency band
  • the lobe width of the leaky cable makes the radiation lobe width of the leaky cable wider, so that the leaky cable has stronger applicability to application scenarios.
  • the patent CN201820503050.5 is to slightly deform the original single slot group (ie the radiation source) to form a complex radiation unit, and it is expected to increase the radial radiation angle of the leaky cable, but it does not actually form an effective spatial
  • the spatial phase of but also belongs to the same radiation source, which has a limited effect on the expansion of the radiation angle.
  • each group of radiating elements needs to be located on the same straight line (slightly offset at most), not in the same circumferential direction, and the distance between the slots in different columns cannot be too far apart, otherwise, the signal coverage in the interval area will be weak.
  • an independent slot hole group is added, that is, at least two slot holes are opened in the same circumferential direction.
  • a leaky cable with wider radiation lobe radiation can be formed by in-phase superposition. , so as to solve the problem of ensuring that the slot hole is directed to the target coverage area during the installation of the leaky cable.
  • the radiation lobe width can be controlled.
  • the insulation outer diameter of a 13/8-inch leaky cable is 42.0mm
  • the 3dB lobe width at a certain frequency point is 90°
  • D the spacing between the rows of slot groups 31 on the unfolded surface of the outer conductor before longitudinal wrapping.
  • the distance D and the included angle ⁇ in this application are both calculated based on the geometric center of the slot hole 33 .
  • the slot group 31 in the middle position should be centrally arranged. As shown in FIG. 2 , the slot group 31 in the middle position is the same as The center lines 34 of the narrow sides of the outer conductor overlap, so that when the outer conductor is longitudinally wrapped, the overlapping sides 35 will not block the slot holes.
  • the slot hole 33 can be the current mainstream slotted slot, character-eight slot or U-shaped slot, and can also be other such as L-shaped slot, T-shaped slot, E-shaped slot or triangular slot, which is not limited here.
  • 3 shows the corresponding situation of the pitch of each row of slot groups 31 when the slot holes 33 are in-line slots, and the pitch and phase of each row of slot groups 31 should be exactly the same to ensure that the radiation lobes can be superimposed on each other.
  • the two adjacent slot holes 33 along the axis of the outer conductor 3 can be designed to be centrally symmetrical (as shown in FIG. symmetry).
  • the target radiation width ⁇ is 360°
  • the slotting parameters of the slotted holes 33 of each row of slotted hole groups 31 can be set to be exactly the same, so that the two adjacent rows of slotted hole groups 31 in the circumferential direction of the outer conductor 3 rotate around the axis of the outer conductor
  • the angle ⁇ can be completely coincident, and this setting can make the 360° omnidirectional radiation of the leaky cable more uniform.

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Abstract

本发明提供了一种宽波束辐射漏泄同轴电缆，包括由内向外依次同轴嵌套的内导体、绝缘层、外导体以及护套，外导体上开设有至少两列槽孔组，至少两列槽孔组分布于外导体圆周方向的不同角度上，相邻两列槽孔组之间的夹角α＝γ/n，其中γ为目标辐射宽度，n为槽孔组列数，每列槽孔组包括若干个沿外导体轴向周期排列的槽孔阵列，各列槽孔组的节距相同，各列槽孔组在同一漏缆截面上的节距相位完全一致，每个槽孔阵列包括若干槽孔。通过增加槽孔列数，并将槽孔组分布于外导体圆周方向的不同角度上，可使得漏缆在工作频段内，增加所有频点(特别是较高频)辐射波瓣宽度，使得漏缆辐射波瓣宽度变广，从而使漏缆具有更强的应用场景适用性。

Description

一种宽波束辐射漏泄同轴电缆 技术领域
本发明涉及漏泄同轴电缆技术，尤其涉及一种宽波束辐射漏泄同轴电缆。
背景技术
随着漏缆技术的发展，漏缆像天线一样越发多样化，漏缆应用领域不断拓展，在5G室内覆盖、工业物联网等领域，无线覆盖漏缆解决方案以其支持频段宽、辐射均匀、高稳定性和可靠性，越发被人们所青睐。针对当前热门的漏缆室分应用来说，由于要求漏缆覆盖的范围较大(或较复杂)，且室内环境布缆敷设难以管控漏缆槽孔朝向，漏缆敷设方向一致性也难以保障，若不考虑增大漏缆横向波瓣角度，将严重影响到实际覆盖效果。
现有技术中，专利CN201820503050.5公开了一种宽波束辐射型漏泄同轴电缆，其为了扩大漏缆径向辐射角度，同时为了减弱槽长过长而对高频传输性能造成的影响，将原来的单槽孔裂变为两个或多个缝隙单元。但是这种结构本质上依然为单一辐射源的略微变形，每组缝隙单元之间的距离不能太远，否则会导致间隔区域信号覆盖弱，因此并无法满足大幅度增加辐射覆盖范围的要求。
发明内容
本发明的目的在于提供一种能够增加横向辐射波瓣宽度的宽波束辐射漏泄同轴电缆。
以下给出一个或多个方面的简要概述以提供对这些方面的基本理解。此概述不是所有构想到的方面的详尽综览，并且既非旨在指认出所有方面的关 键性或决定性要素亦非试图界定任何或所有方面的范围。其唯一的目的是要以简化形式给出一个或多个方面的一些概念以为稍后给出的更加详细的描述之序。
根据本发明的一方面，提供了一种宽波束辐射漏泄同轴电缆，包括由内向外依次同轴嵌套的内导体、绝缘层、外导体以及护套，所述外导体上开设有至少两列槽孔组，所述至少两列槽孔组分布于所述外导体圆周方向的不同角度上，相邻两列所述槽孔组之间的夹角α＝γ/n，其中γ为目标辐射宽度，n为槽孔组列数，每列所述槽孔组包括若干个沿所述外导体轴向周期排列的槽孔阵列，各列所述槽孔组的节距相同，各列所述槽孔组在同一漏缆截面上的节距相位完全一致，每个所述槽孔阵列包括若干槽孔。
在一实施例中，该宽波束辐射漏泄同轴电缆的所述槽孔组列数n＝γ/β，其中β为每列槽孔组的波瓣宽度。
在一实施例中，该宽波束辐射漏泄同轴电缆的各列所述槽孔组的槽孔开槽参数完全一致。
在一实施例中，该宽波束辐射漏泄同轴电缆的所述槽孔为一字槽、八字槽、U型槽、L型槽、T型槽、E型槽或三角形槽。
在一实施例中，该宽波束辐射漏泄同轴电缆的所述槽孔为U型槽或八字槽，沿所述外导体轴线方向的相邻两个槽孔中心对称设置，所述外导体圆周方向上的相邻两列槽孔组绕所述外导体轴线旋转角度α后能够完全重合。
在一实施例中，该宽波束辐射漏泄同轴电缆的所述槽孔组列数n＝2～6。
在一实施例中，该宽波束辐射漏泄同轴电缆的当所述槽孔组列数n＝3或5时，位于中间位置的槽孔组与所述外导体窄边的中线重合。
在一实施例中，该宽波束辐射漏泄同轴电缆的所述槽孔组在展开的外导体上的间距D＝απD 绝缘/360°，其中D 绝缘为绝缘层外径。
本发明实施例的有益效果是：通过增加槽孔列数，并将槽孔组分布于外导体圆周方向的不同角度上，可使得漏缆在工作频段内，增加所有频点(特别是较高频)辐射波瓣宽度，使得漏缆辐射波瓣宽度变广，从而使漏缆具有更强的应用场景适用性，解决了漏缆用在室号分布系统中，由于难以确保漏缆辐射方向与敷设方向一致性，而造成的部分弱覆盖问题，使得漏泄电缆更适用于室内场景。
附图说明
为了更清楚地说明本发明实施例的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，应当理解，以下附图仅示出了本发明的某些实施例，因此不应被看作是对范围的限定，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他相关的附图。
在结合以下附图阅读本公开的实施例的详细描述之后，能够更好地理解本发明的上述特征和优点。在附图中，各组件不一定是按比例绘制，并且具有类似的相关特性或特征的组件可能具有相同或相近的附图标记。
图1是本发明实施例的立体结构示意图；
图2是本发明实施例外导体展开示意图(槽孔为八字槽)；
图3是本发明实施例外导体展开示意图(槽孔为一字槽)；
图4是本发明实施例外导体展开示意图(槽孔为U型槽)；
图5是本发明实施例截面示意图；
其中：1-内导体；2-绝缘层；3-外导体；4-护套；31-槽孔组；311-第一 槽孔组；312-第二槽孔组；313-第三槽孔组；32-槽孔阵列；33-槽孔；34-中线；35-叠边。
具体实施方式
以下结合附图和具体实施例对本发明作详细描述。注意，以下结合附图和具体实施例描述的诸方面仅是示例性的，而不应被理解为对本发明的保护范围进行任何限制。
如图1和图2所示，本发明提供了一种宽波束辐射漏泄同轴电缆，包括由内向外依次同轴嵌套的内导体1、绝缘层2、外导体3以及护套4。外导体3上开设有至少两列槽孔组31，这些槽孔组31分布于外导体3圆周方向的不同角度上，相邻两列槽孔组31之间的夹角α＝γ/n，其中γ为目标辐射宽度，n为槽孔组列数。如图2所示，每列槽孔组31包括若干个沿外导体轴向周期排列的槽孔阵列32，每列槽孔组包括若干个沿所述外导体轴向周期排列的槽孔阵列，各列槽孔组31的节距P相同，各列槽孔组31在同一漏缆截面上的节距相位完全一致，每个槽孔阵列32包括若干槽孔33。
通过增加槽孔组31的列数，并将槽孔组31分布于外导体3圆周方向的不同角度上，可使得漏缆在工作频段内，增加所有频点(特别是较高频)辐射波瓣宽度，使得漏缆辐射波瓣宽度变广，从而使漏缆具有更强的应用场景适用性。
现有技术中，专利CN201820503050.5是将原单一槽孔组(即辐射源)略微变形，形成复杂的辐射单元，期望增大漏缆径向辐射角度，但其实际上在空间上未形成有效的空间相位，还属于同一辐射源，对辐射角的扩大作用有限。该专利中每组辐射单元需要位于同一直线上(最多略有偏移)，并非处 于同一圆周方向上，且不同列的槽孔之间距离不能相隔太远，否则会导致间隔区域信号覆盖弱。本申请则是以增加独立的槽孔组，即同一圆周方向上至少开设两个槽孔，各槽孔组之间由于相位一致，能够通过同相叠加的方式形成更宽辐射波瓣辐射的漏缆，从而解决了漏缆安装时需要保证槽孔朝向目的覆盖区域这一难题。
通过设置槽孔组31的列数和分布角度，可以控制辐射波瓣宽度。例如：某13/8英寸漏缆绝缘外径42.0mm，在某频点3dB波瓣宽度90°，需增大波瓣宽度至270°(即目标辐射宽度)，则n＝γ/β＝270/90＝3，即最少需3列槽孔组31；α＝γ/n＝270/3＝90°，即槽孔组31在漏缆横截面上夹角为90°(最小夹角)；如图5所示，第一槽孔组311、第二槽孔组312和第三槽孔组313两两之间的夹角α均为90°。
加工时，在展开的外导体3上以间距D开设槽孔组31即可，D＝απD 绝 缘/360°，其中D 绝缘为绝缘层2的外径。上述例子中可以计算得到D＝32.97mm，因此每列槽孔组31在未纵包前的外导体展开面上间隔为32.97mm。
需要说明的是，本申请中的间距D和夹角α，均是以槽孔33的几何中心计算。
此外，需要注意的是，当槽孔组列数n＝3或5等奇数列时，位于中间位置的槽孔组31应当居中设置，如图2中所示，中间位置的槽孔组31与外导体窄边的中线34重合，从而当外导体纵包后，叠边35不会遮挡槽孔。
本申请中，槽孔33可以为目前主流的一字槽、八字槽或U型槽，也可以为其他诸如L型槽、T型槽、E型槽或三角形槽，在此不做限制。图3展示 了当槽孔33为一字槽时，各列槽孔组31的节距对应情况，各列槽孔组31的节距相位应完全一致，以确保辐射波瓣能够相互叠加。
如果槽孔33为U型槽或八字槽，可将沿外导体3轴线方向的相邻两个槽孔33设计为中心对称设置(如图4中两个U型槽槽孔33关于点A中心对称)。如果目标辐射宽度γ为360°，可将各列槽孔组31的槽孔33开槽参数设置为完全一致,从而外导体3圆周方向上的相邻两列槽孔组31绕外导体轴线旋转角度α后能够完全重合，这样设置能够使漏缆的360°全向辐射更加均匀。
本说明书中各个实施例采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似部分互相参见即可。
提供对本公开的先前描述是为使得本领域任何技术人员皆能够制作或使用本公开。对本公开的各种修改对本领域技术人员来说都将是显而易见的，且本文中所定义的普适原理可被应用到其他变体而不会脱离本公开的精神或范围。由此，本公开并非旨在被限定于本文中所描述的示例和设计，而是应被授予与本文中所公开的原理和新颖性特征相一致的最广范围。
以上所述仅为本申请的较佳实例而已，并不用以限制本申请，凡在本申请的精神和原则之内，所做的任何修改、等同替换、改进等，均应包含在本申请保护的范围之内。

Claims (8)

  1. 一种宽波束辐射漏泄同轴电缆，包括由内向外依次同轴嵌套的内导体、绝缘层、外导体以及护套，其特征在于：所述外导体上开设有至少两列槽孔组，所述至少两列槽孔组分布于所述外导体圆周方向的不同角度上，相邻两列所述槽孔组之间的夹角α＝γ/n，其中γ为目标辐射宽度，n为槽孔组列数，每列所述槽孔组包括若干个沿所述外导体轴向周期排列的槽孔阵列，各列所述槽孔组的节距相同，各列所述槽孔组在同一漏缆截面上的节距相位完全一致，每个所述槽孔阵列包括若干槽孔。
  2. 根据权利要求1所述的宽波束辐射漏泄同轴电缆，其特征在于：所述槽孔组列数n＝γ/β，其中β为每列槽孔组的波瓣宽度。
  3. 根据权利要求1所述的宽波束辐射漏泄同轴电缆，其特征在于：所述槽孔为一字槽、八字槽、U型槽、L型槽、T型槽、E型槽或三角形槽。
  4. 根据权利要求3所述的宽波束辐射漏泄同轴电缆，其特征在于：所述槽孔为U型槽或八字槽，沿所述外导体轴线方向的相邻两个槽孔中心对称设置。
  5. 根据权利要求1所述的宽波束辐射漏泄同轴电缆，其特征在于：所述外导体圆周方向上的相邻两列槽孔组绕所述外导体轴线旋转角度α后能够完全重合。
  6. 根据权利要求1所述的宽波束辐射漏泄同轴电缆，其特征在于：所述槽孔组列数n＝2～6。
  7. 根据权利要求6所述的宽波束辐射漏泄同轴电缆，其特征在于：当所述槽孔组列数n＝3或5时，位于中间位置的槽孔组与所述外导体窄边的中线重合。
  8. 根据权利要求1所述的宽波束辐射漏泄同轴电缆，其特征在于：所述槽孔组在展开的外导体上的间距D＝απD 绝缘/360°，其中D 绝缘为绝缘层外径。
PCT/CN2021/079562 2021-02-03 2021-03-08 一种宽波束辐射漏泄同轴电缆 WO2022165910A1 (zh)

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