CN112803169A - Radiation enhancement type leakage coaxial cable - Google Patents

Abstract

Translated fromChinese

本发明提供了一种辐射增强型漏泄同轴电缆，包括自中心向外环面依次设置的内导体、绝缘层、外导体和护套，外导体上开有特制槽孔，特制槽孔包含有至少两列分布于外导体圆周方向的不同角度上的槽孔组，每列槽孔组包括若干个沿外导体轴向以固定节距周期性重复排列的槽孔阵列，每个槽孔阵列包括若干槽孔，各列槽孔组的节距相同，槽孔组中至少有一列主辐射槽组和一列主导向槽组，主导向槽组顺着信号传输方向超前主辐射槽组四分之一个节距。本发明通过设置相差四分之一个节距的主辐射槽组和主导向槽组，能够增强主辐射方向上的主辐射量，从而增强漏缆的使用频段内的辐射性能，使得漏泄电缆具有更强的场景适应能力。

The invention provides a radiation-enhanced leaky coaxial cable, comprising an inner conductor, an insulating layer, an outer conductor and a sheath sequentially arranged from the center to the outer ring surface, the outer conductor is provided with a special slotted hole, and the special slotted hole contains At least two rows of slotted hole groups distributed at different angles in the circumferential direction of the outer conductor, each row of slotted hole groups includes a plurality of slotted hole arrays periodically repeated at a fixed pitch along the axial direction of the outer conductor, and each slotted hole array includes A number of slot holes, the pitch of each row of slot hole groups is the same, there is at least one row of main radiation slot group and one row of main guide slot group in the slot hole group, the main guide slot group is a quarter ahead of the main radiation slot group along the signal transmission direction pitch. The present invention can enhance the main radiation amount in the main radiation direction by setting the main radiation slot group and the main guide slot group with a quarter pitch difference, thereby enhancing the radiation performance in the use frequency band of the leaky cable, so that the leaky cable has Stronger scene adaptability.

Description

Radiation enhancement type leakage coaxial cable

Technical Field

The invention relates to a leaky coaxial cable design technology, in particular to a radiation enhanced leaky coaxial cable.

Background

With the development of leaky coaxial cable technology, leaky cables are diversified as antennas, the application field of leaky cables is continuously expanded, and in the fields of 5G indoor coverage, industrial internet of things and the like, a wireless coverage leaky cable solution is favored by people due to the fact that the solution supports wide frequency band, uniform radiation, high stability and reliability.

Aiming at certain specific industrial scenes (such as key coverage scenes, wireless sensing systems and the like), high receiving power is needed to trigger sensing conditions, the radiation quantity requirement on leaky cables is high, and the conventional leaky cable design is difficult to achieve; in some key coverage scenes, the requirement on the radiation quantity of the leaky cable is high, the radiation quantity is increased by changing the setting parameters of the slotted hole of the outer conductor of the leaky cable in the traditional mode, the traditional mode has great limitation, only certain specific frequency bands can be optimized, the full-frequency radiation performance cannot be enhanced or the enhancement degree of the full-frequency radiation performance cannot be consistent, and the problem that the radiation quantity is different from the radiation quantity is often solved.

Disclosure of Invention

The invention aims to provide a radiation-enhanced leaky coaxial cable which can conveniently and effectively enhance the main radiation quantity in the main radiation direction and is particularly suitable for scenes with high requirements on leaky cable radiation.

The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.

According to one aspect of the invention, a radiation-enhanced leaky coaxial cable is provided, which comprises an inner conductor, an insulating layer, an outer conductor and a sheath, wherein the inner conductor, the insulating layer, the outer conductor and the sheath are sequentially arranged from the center to the outer ring surface, a specially-made slotted hole is formed in the outer conductor, the specially-made slotted hole comprises at least two rows of slotted hole groups, the at least two rows of slotted hole groups are uniformly distributed in the circumferential direction of the outer conductor, each row of slotted hole groups comprises a plurality of slotted hole arrays, the slotted hole arrays are periodically and repeatedly arranged along the axial direction of the outer conductor according to a fixed pitch, each slotted hole array comprises a plurality of slotted holes, the pitches of the slotted hole groups in each row are the same, at least one row of the slotted hole groups is a main radiation slotted hole group, at least one row of the main radiation slotted hole group is a main guide slotted hole.

In one embodiment, the main pilot slot set of the radiation enhanced leaky coaxial cable is consistent with the slot parameter setting of the main radiation slot set.

In one embodiment, the angle α between the main guide slot group and the main radiating slot group in the circumferential direction of the leaky cable and the total number n of slot groups of the radiation-enhanced leaky coaxial cable are in a relation of α being 360 °/n.

In one embodiment, the distance D between the slot groups of the radiation-enhanced leaky coaxial cable on the unfolded outer conductor and the outer diameter D of the insulating layer_InsulationThe relationship of (1) is: d ═ pi^＊D_Insulation/n。

In one embodiment, the main guide slot group and the main radiation slot group of the radiation-enhanced leaky coaxial cable are respectively provided with 1-3 rows.

In one embodiment, when said specially made slot comprises 3 rows of slot groups, the middle slot group is coincident with the middle line of the narrow side of said outer conductor.

In one embodiment, the specially-made slot of the radiation-enhanced leaky coaxial cable comprises 1 column of main radiation slot group, and 1 column or 2 columns of main guide slot group.

In one embodiment, the specially-made slot of the radiation-enhanced leaky coaxial cable comprises 1 column of main radiation slot group and 2 columns of main guide slot group, and an included angle between the main radiation slot group and the main guide slot group in the circumferential direction of the leaky cable is 120 degrees.

In one embodiment, the specially-made slot of the radiation-enhanced leaky coaxial cable comprises 1 column of main radiation slot group and 1 column of main guide slot group, and an included angle between the main radiation slot group and the main guide slot group in the circumferential direction of the leaky cable is 180 degrees.

The embodiment of the invention has the beneficial effects that: the main radiation slot group and the main guide slot group are arranged in the circumferential direction of the leaky cable, and the difference between the main radiation slot group and the main guide slot group is set to be a quarter pitch, so that the main radiation amount in the main radiation direction can be enhanced, the radiation performance of the leaky cable in the use frequency band is enhanced, the characteristics of low loss and uniform broadband radiation of the leaky cable are retained, the problem that the radiation performance of the leaky cable is too weak in some scenes can be solved, and the leaky cable has stronger scene adaptability.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

The above features and advantages of the present disclosure will be better understood upon reading the detailed description of embodiments of the disclosure in conjunction with the following drawings. In the drawings, components are not necessarily drawn to scale, and components having similar relative characteristics or features may have the same or similar reference numerals.

FIG. 1 is a side view of an embodiment of the present invention;

FIG. 2 is a side view of an embodiment of the invention (with the outer conductor expanded);

FIG. 3 is a schematic diagram of an expanded outer conductor according to an embodiment of the present invention (the slot is a figure eight slot);

FIG. 4 is a corresponding cross-sectional schematic view of FIG. 3;

FIG. 5 is a schematic view of an expanded outer conductor according to another embodiment of the present invention (the slot is a figure eight slot);

FIG. 6 is a schematic view of the development of an outer conductor according to an embodiment of the present invention (the slot is a U-shaped slot);

FIG. 7 is a schematic view of an embodiment of the present invention showing an expanded conductor (the slot is a straight slot);

wherein: 1-an inner conductor; 2-an insulating layer; 3-an outer conductor; 4-a sheath; 31-a group of slots; 31 a-main radiation groove group; 31 b-a main guide groove set; 32-slot array; 33-a slot; 34-midline; and 35-edge folding.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments. It is noted that the aspects described below in connection with the figures and the specific embodiments are only exemplary and should not be construed as imposing any limitation on the scope of the present invention.

As shown in fig. 1 and fig. 2, the embodiment of the present invention provides a radiation enhanced leaky coaxial cable, which comprises an inner conductor 1, aninsulating layer 2, anouter conductor 3 and asheath 4, which are sequentially arranged from the center to the outer ring surface. Theouter conductor 3 is provided with a special slot, which comprises at least two rows ofslot groups 31, and theslot groups 31 are uniformly distributed in the circumferential direction of theouter conductor 3, in other words, the included angles between theslot groups 31 are equal.

Each of theslot groups 31 includes a plurality ofslot arrays 32 periodically arranged along the axial direction of theouter conductor 3, and theslot arrays 32 are periodically and repeatedly arranged at a fixed pitch P, and each of theslot arrays 32 includes a plurality ofslots 33. The pitches of theslotted hole groups 31 are the same, at least one of the slottedhole groups 31 is a main radiatinggroove group 31a, and at least one of the slottedhole groups 31 is a mainguide groove group 31 b; the mainpilot groove group 31b leads the mainradiation groove group 31a by one-quarter pitch P in the signal transmission direction.

By arranging at least one mainradiation groove group 31a and at least one mainguide groove group 31b in the circumferential direction of the leaky cable and setting the mainradiation groove group 31a and the mainguide groove group 31b to have a quarter pitch difference, the phase difference of excitation electric fields of the mainradiation groove group 31a and the mainguide groove group 31b can be close to 90 degrees, so that the main radiation amount in the main radiation direction is enhanced, the radiation performance of the leaky cable in a use frequency band is enhanced, the characteristics of low loss and broadband uniform radiation of the leaky cable are retained, the problem that the radiation performance of the leaky cable is too weak in some scenes can be solved, and the leaky cable has stronger scene adaptability.

The parameters of the mainguide slot group 31b and theslot 33 of the mainradiation slot group 31a may not be consistent, but if the parameters of the mainguide slot group 31b and theslot 33 of the mainradiation slot group 31a are consistent, the radiation amount of the leaky cable can be increased manyfold.

The relationship between the angle alpha between the mainguide slot group 31b and the mainradiation slot group 31a in the circumferential direction of the leakage cable and the total slot hole row number nIs 360 °/n. The distance D between theouter conductor 3 and the outer diameter D of the insulating layer_InsulationThe relationship of (1) is: d ═ pi^＊D_InsulationAnd/n. During processing, theouter conductor 3 to be developed may be provided with theslot groups 31 at the pitch D. It should be noted that, in the present application, the distance D and the included angle α are both calculated by the geometric center of theslot 33.

Generally, the mainguide groove group 31b and the mainradiation groove group 31a can be respectively arranged in 1-2 rows. When two rows of main radiatinggroove groups 31a are arranged, the two rows of main radiatinggroove groups 31a should be arranged adjacently, because the two rows of main radiatinggroove groups 31a have the same pitch phase, the electric fields are mutually overlapped, the width of a radiating lobe is wider, the mainguide groove group 31b is arranged at the outer sides of the two rows of main radiatinggroove groups 31a, and the effects of wide radiating lobe and strong radiation performance can be further obtained. It should be noted that when the number n of slots is 3, themiddle slot group 31 should be centered, as shown in fig. 3, and themiddle slot group 31 coincides with thecenter line 34 of the narrow side of the outer conductor, so that theoverlapping side 35 does not block theslot 33 when the outer conductor is wrapped longitudinally.

Preferably, the specially made slot includes 1 column of main radiation slot group, 1 column or 2 columns of main guide slot group. For example: as shown in fig. 3, for an 13/8 "inch leaky cable, 2 rows ofmain guide grooves 31b and 1 row of mainradiating grooves 31a can be arranged, each row adopts a splay slotting mode, a copper strip with the width of 148mm is used as anouter conductor 3, and the distance D between slotted holes is pi^＊19.2mm/3 ≈ 44.8 mm. When wrapped around a leaky cable, themain guide groove 31b forms an angle α of about 120 ° with the mainradiating groove 31a, as shown in fig. 4.

Alternatively, as shown in fig. 5, 1 row ofmain guide slots 31b and 1 row of mainradiating slots 31a may be provided, each row is slotted in a splay manner, and a copper strip with a width of 148mm is used as theouter conductor 3, so that the slot opening distance D is pi^＊19.2mm/2 ≈ 67.2mm, and the angle between themain guide slot 31b and themain radiation slot 31a is about 180 ° when wrapped on a leaky cable.

It is easy to understand that theslot 33 may be a straight slot, an eight-shaped slot or a u-shaped slot, which is the mainstream at present, or may be other slots such as an L-shaped slot, a T-shaped slot, an E-shaped slot or a triangular slot, which is not limited herein. Fig. 6 shows the arrangement of the slottedholes 33 when they are straight slots, and fig. 7 shows the arrangement of the slottedholes 33 when they are u-shaped slots.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the spirit or scope of the disclosure. Thus, the disclosure is not intended to be limited to the examples and designs described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The above description is only a preferred example of the present application and should not be taken as limiting the present application, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present application should be included in the scope of the present application.

Claims (9)

1. The utility model provides a radiation enhancement mode leaky coaxial cable, includes inner conductor, insulating layer, outer conductor and the sheath that sets gradually from the center to the outer ring face, its characterized in that: the outer conductor is provided with a specially-made slotted hole, the specially-made slotted hole comprises at least two rows of slotted hole groups, the at least two rows of slotted hole groups are uniformly distributed in the circumferential direction of the outer conductor, each row of the slotted hole groups comprises a plurality of slotted hole arrays, the slotted hole arrays are periodically and repeatedly arranged along the axial direction of the outer conductor according to a fixed pitch, each slotted hole array comprises a plurality of slotted holes, the pitches of the slotted hole groups in all rows are the same, at least one row of the slotted hole groups is a main radiating slot group, at least one row of the slotted hole groups is a main guide slot group, and the main guide slot group leads the main radiating slot group by one quarter pitch along the signal transmission direction.

2. The multi-directional radiation leaky coaxial cable of claim 1, wherein: the main guide groove group and the main radiation groove group are consistent in groove hole parameter setting.

3. The multi-directional radiation leaky coaxial cable of claim 1, wherein: the relation between the included angle alpha of the main guide slot group and the main radiation slot group in the circumferential direction of the leaky cable and the total slot hole array number n is as follows: α is 360 °/n.

4. The multi-directional radiation leaky coaxial cable of claim 3, wherein: the distance D between the slot groups on the unfolded outer conductor and the outer diameter D of the insulating layer_InsulationThe relationship of (1) is: d ═ pi x D_Insulation/n。

5. The multi-directional radiation leaky coaxial cable of claim 1, wherein: the main guide groove group and the main radiation groove group are respectively provided with 1-2 rows.

6. The multi-directional radiation leaky coaxial cable of claim 5, wherein: when the special slotted hole comprises 3 rows of slotted hole groups, the slotted hole group at the middle position is superposed with the middle line of the narrow side of the outer conductor.

7. The multi-directional radiation leaky coaxial cable of claim 5, wherein: the special slotted holes comprise 1 column of main radiation groove groups and 1 column or 2 columns of main guide groove groups.

8. The multi-directional radiation leaky coaxial cable of claim 7, wherein: the specially-made slotted holes comprise 1 row of main radiating groove groups and 2 rows of main guide groove groups, and an included angle between each main radiating groove group and each main guide groove group in the circumferential direction of the leaky cable is 120 degrees.

9. The multi-directional radiation leaky coaxial cable of claim 7, wherein: the specially-made slotted holes comprise 1 line of main radiating groove group and 1 line of main guide groove group, and an included angle between the main radiating groove group and the main guide groove group in the circumferential direction of the leaky cable is 180 degrees.

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