CN212182558U - Multilayer artificial medium cylindrical lens - Google Patents
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- CN212182558U CN212182558U CN202021218561.6U CN202021218561U CN212182558U CN 212182558 U CN212182558 U CN 212182558U CN 202021218561 U CN202021218561 U CN 202021218561U CN 212182558 U CN212182558 U CN 212182558U
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- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
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Abstract
The application discloses artifical medium cylindrical lens of multilayer solves current cylindrical lens parameter uniformity poor, the great, the more problem of two-way communication interference of scattering. A multilayer artificial dielectric cylindrical lens comprises N concentric cylindrical sleeves with different equivalent dielectric constants, wherein a first sleeve, a second sleeve and an Nth sleeve are arranged from the center to the surface respectively; the first sleeve is a solid cylinder made of a first material, the Nth sleeve is a cylindrical shell made of a second material, the ith sleeve is a cylindrical shell of a composite layer structure formed by alternately compounding layers of the first material and layers of the second material, the dielectric constant of the first material is larger than that of the second material, and i is 2,3, … … and N-1. The cylindrical lens with the stably distributed dielectric constant is realized.
Description
Technical Field
The application relates to the field of antennas, in particular to a multilayer artificial dielectric cylindrical lens.
Background
The dielectric lens is a part used in the communication antenna, the traditional luneberg ball antenna is manufactured through two processes of punching and foaming, the punching mode has high technician difficulty, the foaming mode has low dielectric constant, and other antennas processed through special materials have high material density. The patent application 201711122204.2 proposes an artificial dielectric multilayer cylindrical lens with low density, which is composed of n concentric layers, each concentric layer comprises a base material with low dielectric constant and an additive material with high dielectric constant and low specific gravity, the base material is a light foaming material, generally plastic, and different types or quantities of additive materials are added in the production of the plastic, so that the process becomes complicated; if the additive is scattered on the surface of the base material, uniformity is not easy to control, and the particles of the additive material distributed on the surface of the base material also cause scattering, thereby affecting the electromagnetic performance.
SUMMERY OF THE UTILITY MODEL
The application provides multilayer artificial medium cylindrical lens, solves the problem that current cylindrical lens parameter uniformity is poor, the scattering is great, two-way communication disturbs more.
The embodiment of the application provides a multilayer artificial dielectric cylindrical lens, which comprises N concentric cylindrical sleeves with different equivalent dielectric constants, wherein a first sleeve, a second sleeve, a third sleeve and a fourth sleeve are arranged from the center to the surface respectively; the first sleeve is a solid cylinder made of a first material, the Nth sleeve is a cylindrical shell made of a second material, the ith sleeve is a cylindrical shell of a composite layer structure formed by alternately compounding layers of the first material and layers of the second material, the dielectric constant of the first material is larger than that of the second material, and i is 2,3, … … and N-1.
Preferably, in the composite layer structure of the ith sleeve, the total thickness of the first material and the second material satisfies the following ratio:ri＝r1i×1+r2i×2and r is1i+r 2i1, wherein,riis the equivalent dielectric constant of the ith sleeve,1、2is the dielectric constant, r, of the first and second materials, respectively1i、r2iThe total thickness of the first and second materials is the ratio.
Preferably, in the multilayer artificial dielectric cylindrical lens, the total thickness of the first material decreases proportionally from the center to the surface.
Preferably, the dielectric constant of the first material is 1.80-2.05, and the dielectric constant of the second material is 1.00-1.10.
Further, the total thickness of the composite layer structure of the ith sleeve is:
ri×Di＝1×d1i+2×d2i
Di＝d1i+d2i
wherein,riis the equivalent dielectric constant of the ith sleeve,1、2respectively the dielectric constants of the first and second materials, DiIs the total thickness of the composite layer structure of the i-th sleeve, d1i、d2iThe total thickness of the first material and the second material in the composite layer structure of the ith sleeve respectively.
Further, the first material is natural fiber or artificial fiber pulp for papermaking, and the second material is a foaming material.
Preferably, in the ith sleeve, if the thickness of the first material single layer is t1The thickness of the second material single layer is t2The number of layers of the first and second materials is LiThen t is1＝d1i/Li、t2＝d2i/Li。
Preferably, in the 2 nd to N-1 th sleeves, the total thickness of the second material is the same.
Preferably, if the first material is a paper material produced by a pulp and paper making technology, the first material is a soft paper, a hard paper shell or a paper material containing both the soft paper and the hard paper shell.
Preferably, the second material is sponge foaming paper, and the thickness of a single layer is 0.5-5 mm.
The beneficial effect of this application includes: the application provides a medium cylindrical lens, it is simple to make, the stable performance, stray scattering is little, and the antenna pattern is more regular. Particularly, when the paper first material and the foamed second material are used, the elasticity of the first material is low, the elasticity of the second material is high, and when the first material and the second material are alternately compounded, the use is reduced or glue is avoided due to the combination of natural tension.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic representation of an embodiment of a multilayer artificial dielectric cylindrical lens;
FIG. 2 is a diagram of the structure of an embodiment of a multilayer artificial dielectric cylindrical lens;
FIG. 3 is a composite layer of an embodiment of a multilayer artificial dielectric cylindrical lens;
FIG. 4 is an ith sleeve of an embodiment of a multi-layer artificial dielectric cylindrical lens;
FIG. 5 is an example of a dielectric constant distribution.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The innovation points of the application are as follows: the multilayer artificial dielectric cylindrical lens adopts a concentric cylindrical composite layer structure formed by alternately winding two uniform materials, and is simple to manufacture and stable in performance; secondly, the multilayer artificial dielectric cylindrical lens is characterized in that the first material with high dielectric constant is gradually reduced from the center to the surface, so that the equivalent dielectric constant of each layer is gradually reduced from the center to the surface, the stray scattering of the antenna is small, and the directional diagram is regular; third, this application first material and second material are compound in turn, reduce to use or avoid using glue for lens antenna performance is more stable.
The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.
Fig. 1 is a view showing the outer shape of an embodiment of a multilayer artificial dielectric cylindrical lens, and as an embodiment of the present application, a multilayer artificial dielectric cylindrical lens 1 includes: a first sleeve 11, an nth sleeve 12, an ith sleeve 13.
In fig. 1, the multilayer artificial dielectric cylindrical lens includes N concentric cylindrical sleeves with different equivalent dielectric constants, and a first sleeve to an nth sleeve are respectively arranged from the center to the surface; the first sleeve is a solid cylinder made of a first material, the Nth sleeve is a cylindrical shell made of a second material, the ith sleeve is a cylindrical shell of a composite layer structure formed by alternately compounding layers of the first material and layers of the second material, the dielectric constant of the first material is larger than that of the second material, and i is 2,3, … … and N-1.
In this application, N is the number of sleeves, that is, the total number of layers of the multilayer artificial dielectric cylindrical lens, and the ith sleeve includes the 2 nd to the N-1 th sleeves, it should be noted that the composite layer structures constituting each sleeve may be the same or different, and the difference of the composite layer structures means that the composite layer structures are formed by alternately compounding layers of the first material and the second material, but the total thickness ratio of the first material and the second material is different.
It should be noted that, in the present application, the dielectric constants are relative dielectric constants, the equivalent dielectric constant of the first sleeve is the dielectric constant of the first material, the equivalent dielectric constant of the nth sleeve is the dielectric constant of the second material, and the equivalent dielectric constant of the ith sleeve is the relative dielectric constant of a composite layer structure formed by combining the layers of the first material and the layers of the second material. The equivalent dielectric constant of the ith sleeve is gradually reduced according to a set distribution as the value of i is increased, specifically, the equivalent dielectric constant is changed between 1.00 and 2.05, and preferably, the equivalent dielectric constant is changed between 1.05 and 2.00.
FIG. 2 shows a structure of an embodiment of a multilayer artificial dielectric cylindrical lens, in which the total thickness of the ith (i ═ 2 to N-1) sleeve is DiThe composite layer structure is composed of a first material and a second material, and is formed by alternately compounding layers of the first material and layers of the second material.
In the composite layer structure of the ith sleeve, the total thickness of the first material and the second material satisfies the following ratio:
ri＝r1i×1+r2i×2 (1)
r1i+r2i＝1 (2)
wherein,riis the equivalent dielectric constant of the ith sleeve,1、2is the dielectric constant, r, of the first and second materials, respectively1i、r2iThe total thickness of the first and second materials is the ratio r1iIs the ratio of the total thickness of the first material to the total thickness of the composite layer structure, r2iIs the ratio of the total thickness of the first material to the total thickness of the composite layer structure.
Therefore, as can be seen from the above formulas (1) and (2),
ri＝2+r1i(1-2) (3)
in the embodiment of the application, in the multilayer artificial dielectric cylindrical lens, the total thickness of the first material decreases from the center to the surface. Specifically, the first sleeve is made of a first material, the Nth sleeve is made of a second material, the 2 nd to the N-1 th sleeves are made of a composite layer structure, and the proportion of the total thickness of the first material to the total thickness of the composite layer structure in the 2 nd to the N-1 th sleeves is gradually reduced, namely r1iDecreasing as the value of i increases.
Fig. 3 is a composite layer of an embodiment of a multilayer artificial dielectric cylindrical lens, the composite layer comprises a plurality of first material layers and a plurality of second material layers, and the composite layer is formed by alternately compounding layers of the first material and layers of the second material, namely, the layers of the first material are connected with the layers of the second material and then connected with the layers … … of the first material, and the layers are alternately reciprocated.
In an embodiment of the present application, in the ith sleeve, the total thickness of the composite layer structure of the ith sleeve is:
ri×Di＝1×d1i+2×d2i (4)
Di＝d1i+d2i (5)
wherein,riis the equivalent dielectric constant of the ith sleeve,1、2respectively the dielectric constants of the first and second materials, DiIs the total thickness of the composite layer structure of the i-th sleeve, d1i、d2iThe total thickness of the first material and the second material in the composite layer structure of the ith sleeve respectively.
As can be seen from the above formulas (4) and (5), the total thickness of the second material in the ith sleeve is:
d2i＝(Di×ri-d1i×1) (6)
further, in the ith sleeve, if the thickness of the first material single layer is t1The thickness of the second material single layer is t2The number of layers of the first and second materials is LiThen, then
t1＝d1i/Li (7)
t2＝d2i/Li (8)
Note that t is1、t2And the thicknesses of the first material and the second material in the composite layer structure forming the ith sleeve are the same or different, and when the thicknesses of the first material and the second material are the same.
For example, the composite layer structure 1: when the thickness of the first material single layer is t1The second material has a single layer thickness of t2Then, the number of layers of the first material and the second material in the ith sleeve is LiThen t is1＝d1i/Li，t2＝d2i/Li。
As another example, the composite layer structure 2: when the thickness of the first material single layer and the thickness of the second material single layer are both t, the number of the first material layers is L1i＝d1iT, the number of layers of the second material is L2i＝d2iT, wherein L1i、L2iThe number of layers of the first and second materials in the ith sleeve, respectively.
As another example, the composite layer structure 3: when the total thickness of the second material in the ith sleeve is d2iThe total thickness of the first material in the ith sleeve is as follows:
furthermore, in the 2 nd to the N-1 th sleeves, the total thickness of the second material is the same, namely the total thickness d of the second material in the ith sleeve is equal to that of the ith sleeve2iAt D2～DN-1While remaining unchanged, then D2～DN-1The thickness variation of (a) is:
fig. 4 is an ith sleeve of an embodiment of a multilayer artificial dielectric cylindrical lens, wherein a first material and a second material are wound to form the ith sleeve, the appearance structure is a cylindrical shell, and further the 1 st to nth sleeves form a concentric cylindrical structure to form the cylindrical lens.
In the embodiment of the application, the dielectric constant of the first material is 1.80-2.05, the dielectric constant of the second material is 1.00-1.10, for example, the dielectric constant of the first material is 1.85, and the dielectric constant of the second material is 1.08.
In the embodiment of the application, the first material is natural fiber or artificial fiber which is used as a raw material and is produced by a pulp papermaking technology, and when the first material is a paper material produced by the pulp papermaking technology, soft paper is wound to form a first material layer; the hard paper shell is a first material layer; or the artificial dielectric lens comprises a combination of the two.
Preferably, the first material is at least partially an ionic liquid produced cellulose film containing a high dielectric constant substance such as a silicate, titanate.
In the embodiment of the application, the second material is a foam material, a soft foam material such as sponge foam paper, for example, polystyrene, polyvinyl chloride, polyethylene are used, and when the second material is the sponge foam paper, the single-layer thickness of the sponge foam paper is 0.5-5 mm.
Most preferably, the second material uses an EPE material.
The medium cylinder lens that this application embodiment provided constitutes the cylinder structure by combined material, when the first material that uses the paper and the second material of foaming, first material elasticity is little, second material elasticity is big, and the two combines in turn, because the natural tension effect combines, reduces to use or avoids using glue, can promote lens stability, reduces stray scattering, makes the antenna pattern more regular, and easily preparation, easily engineering realization and batch production.
Fig. 2 is a dielectric constant distribution example, which provides a dielectric constant distribution of an ith sleeve of the multilayer artificial dielectric cylindrical lens according to the present application, in the present application, the ith sleeve is formed by winding a concentric cylindrical composite layer structure formed by alternately winding two uniform materials, and a first material with a high dielectric constant is gradually reduced from the center to the surface.
In FIG. 2, the abscissa is the layer thickness and the ordinate is the dielectric constant value, wherein the layer thickness is the total thickness of the composite layer structure, which is the sum of the total thickness of the first material and the second material, and the dielectric constant of the first material is highest1The second material has a dielectric constant of at least2The equivalent dielectric constant of the composite layer isri。
In fig. 2, the ith sleeve (i ═ 2,3, … …, N-1) has a total thickness D of the composite layersiIncluding the total thickness d of the second material2iTotal thickness d of the first material1iThe equivalent dielectric constant of the composite layer isri. Specifically, from left to right, the 2 nd sleeve, total thickness D2Wherein the total thickness d of the second material22A first material d12Equivalent dielectric constant ofr2(ii) a Sleeve No. 3, total thickness D3Wherein the total thickness d of the second material23A first material d13Equivalent dielectric constant ofr3(ii) a … … sleeve N-1, total thickness DN-1Wherein the total thickness d of the second material2N-1A first material d1N-1Equivalent dielectric constant ofrN-1。
In the embodiment of the present application, the total thickness ratio of the first material gradually decreases from left to right (in the radial direction of the cylindrical lens), that is, the total thickness ratio of the second material gradually increases from left to right, so that the equivalent dielectric constant gradually decreases from left to right, that is, the equivalent dielectric constant gradually decreases from the center to the surface of the cylindrical lens, the layer with the largest equivalent dielectric constant is the layer 1, and the layer with the smallest equivalent dielectric constant is the layer N.
It should be noted that equations 1-10 of the present application are not intended to be used to calculate the equivalent dielectric constant of the ith sleeve of the composite layer based on the dielectric constants and thicknesses of the first and second materials of the composite layer. On the contrary, the equivalent dielectric constant of each layer of the dielectric lens should be set according to the engineering requirementriAccording to a radial distributionriDielectric constant of the first material1And dielectric constant of the second material2The layer thickness of the first material and the layer thickness of the second material are determined.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A multilayer artificial dielectric cylindrical lens is characterized by comprising N concentric cylindrical sleeves with different equivalent dielectric constants, wherein a first sleeve, a second sleeve, a third sleeve and a fourth sleeve are arranged from the center to the surface respectively;
the first sleeve is a solid cylinder made of a first material, the Nth sleeve is a cylindrical shell made of a second material, the ith sleeve is a cylindrical shell of a composite layer structure formed by alternately compounding layers of the first material and layers of the second material, the dielectric constant of the first material is larger than that of the second material, and i is 2,3, … … and N-1.
2. The multilayer artificial dielectric cylindrical lens of claim 1, wherein the composite layer structure of the ith sleeve comprises the first material and the second material in a total thickness ratio of:
and r is1i+r2i1, wherein,riis the equivalent dielectric constant of the ith sleeve,1、2is the dielectric constant, r, of the first and second materials, respectively1i、r2iThe total thickness of the first and second materials is the ratio.
3. The multi-layered artificial dielectric cylindrical lens of claim 1, wherein the total thickness of the first material decreases from the center to the surface of the multi-layered artificial dielectric cylindrical lens.
4. The multilayer artificial dielectric cylindrical lens of claim 1, wherein the first material has a dielectric constant of 1.80 to 2.05 and the second material has a dielectric constant of 1.0 to 1.1.
5. The multilayer artificial dielectric cylindrical lens of claim 1, wherein the total thickness of the composite layer structure of the ith sleeve satisfies:
ri×Di＝1×d1i+2×d2i
Di＝d1i+d2i
wherein,riis the equivalent dielectric constant of the ith sleeve,1、2respectively the dielectric constants of the first and second materials, DiThe total thickness of the composite layer structure of the ith sleeveDegree, d1i、d2iThe total thickness of the first material and the second material in the composite layer structure of the ith sleeve respectively.
6. The multilayer artificial dielectric cylindrical lens of claim 1, wherein the first material is natural fiber or artificial fiber pulp paper and the second material is a foam material.
7. The multi-layer artificial dielectric cylindrical lens of claim 5 wherein in said ith sleeve, if said first material is a single layer thick t1The thickness of the second material single layer is t2The number of layers of the first and second materials is LiThen t is1＝d1i/Li、t2＝d2i/Li。
8. The multilayer artificial dielectric cylindrical lens of claim 5, wherein the total thickness of the second material is the same in the 2 nd to N-1 th sleeves.
9. The multilayered artificial dielectric cylindrical lens of claim 6, wherein if the first material is a paper material produced by a pulp and paper making technique, the first material is a soft paper, a hard paper shell, or both soft paper and hard paper shells.
10. The multilayer artificial dielectric cylindrical lens of claim 6, wherein the second material is sponge foam paper with a single layer thickness of 0.5-5 mm.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113839217A (en) * | 2021-08-31 | 2021-12-24 | 广东盛路通信科技股份有限公司 | Luneberg lens and three-dimensional Luneberg lens |
| WO2022001476A1 (en) * | 2020-06-28 | 2022-01-06 | 北京高信达通信科技股份有限公司 | Dielectric cylindrical lens, dielectric film, and fabrication method for dielectric cylindrical lens |
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2020
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022001476A1 (en) * | 2020-06-28 | 2022-01-06 | 北京高信达通信科技股份有限公司 | Dielectric cylindrical lens, dielectric film, and fabrication method for dielectric cylindrical lens |
| CN113839217A (en) * | 2021-08-31 | 2021-12-24 | 广东盛路通信科技股份有限公司 | Luneberg lens and three-dimensional Luneberg lens |
| CN113839217B (en) * | 2021-08-31 | 2024-01-26 | 广东盛路通信科技股份有限公司 | Dragon's lens and three-dimensional Dragon's lens |
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