An artificial medium composite body, an artificial medium lens, and a manufacturing method

Abstract

The present application discloses an artificial dielectric composite body, an artificial dielectric lens and a manufacturing method. The metal layers are located on the front and back sides of the plate, and are distributed in a cross-shaped wire pattern; a foaming material is bonded to the outside of the metal layer. The artificial dielectric composite body is filled in the space formed by the contour of the artificial dielectric lens. The present application solves the problem of high manufacturing difficulty in the prior art method.

Description

Technical Field

[0001] This application relates to the field of radio antennas, and particularly to an artificial dielectric composite, an artificial dielectric lens, and a manufacturing method thereof. Background Art

[0002] A Luneburg lens can converge electromagnetic waves of a specific wavelength incident thereon, and similarly, it can also reflect the electromagnetic waves back along the original direction. Theoretically, the dielectric constant of the dielectric material used for the Luneburg lens should continuously change from 2 to 1 in a certain mathematical law from the center of the sphere to the outer diameter. However, such an ideal dielectric does not exist in nature, so in actual design, discrete spherical shells with a layered design are commonly used instead. Many people have previously adopted the drilling method to control the dielectric constant of the material by the proportion of the volume of the holes in the material, but it is difficult to control the drilling density and accuracy of this method, the structure is complex, the manufacturing difficulty is high, the weight is large, and it is not suitable for mass production. Summary of the Invention

[0003] To achieve the above object, the embodiments of this application provide an artificial dielectric composite, an artificial dielectric lens, and a manufacturing method, so as to solve the problem of high manufacturing difficulty in the prior art method.

[0004] In a first aspect, this application provides an artificial dielectric composite, including a plate, a metal layer, and a foaming material. The metal layer is located on the front and back sides of the plate and is distributed in a cross-shaped metal wire pattern. The foaming material is bonded to the outside of the metal layer.

[0005] Preferably, the cross-shaped metal wire distribution of the metal layer is formed by a printed circuit technique on the surface of a printed circuit board or by electroplating on the surface of a PC board.

[0006] Preferably, the foaming material is any one of the following: EPE pearl cotton, EPS, and EVC material.

[0007] Preferably, the plate is a printed circuit board or a PC board substrate, and the thickness is 0.05 - 0.3 mm.

[0008] Preferably, the overall shape of the artificial dielectric composite is a cube, and the edge length is 3 - 6 mm.

[0009] In a second aspect, this application provides an artificial dielectric lens, and the particles of the artificial dielectric composite are filled in the space formed by the contour of the artificial dielectric lens.

[0010] Preferably, the contour of the artificial dielectric lens is spherical, ellipsoidal, or cylindrical.

[0011] In a third aspect, this application provides a manufacturing method for an artificial dielectric composite, which is used to manufacture the artificial dielectric composite according to any item in the first aspect of this application, and includes the following steps:

[0012] Generate a cross-wire distribution on the surface of the sheet material by means of printed circuit or electroplating.

[0013] Bond a foaming material outside the metal layer to form a composite layer structure of the artificial dielectric composite with a set thickness.

[0014] Cut the composite layer structure into a cube.

[0015] Preferably, it further includes the following steps: change the equivalent dielectric constant of the artificial dielectric composite by changing the width and / or spacing of the metal wires.

[0016] In a fourth aspect, the present application also proposes a method for manufacturing an artificial dielectric lens, using the particles of the artificial dielectric composite described in the present application, including the following steps:

[0017] Construct the overall contour of the artificial dielectric lens, or decompose the artificial dielectric lens into a multi-layer structure and construct the contour of each layer structure.

[0018] Fill the artificial dielectric composite into the contour.

[0019] Preferably, in the method of the present application, set the equivalent dielectric constant within the overall or each layer structure contour of the artificial dielectric lens; fill the artificial dielectric composite conforming to the equivalent dielectric constant into the contour.

[0020] Preferably, the artificial dielectric lens is composed of a multi-layer structure with different equivalent dielectric constants, and the equivalent dielectric constant is distributed from high to low from the central layer to the outermost layer, and the equivalent dielectric constant is 1.05 - 2.1.

[0021] Preferably, in the method of the present application, fill the artificial dielectric composite with an equivalent dielectric constant between 1.8 - 2.1 into the central sphere; fill the artificial dielectric composite with an equivalent dielectric constant between 1.4 - 1.7 into the middle layer of the sphere; fill the artificial dielectric composite with a dielectric constant between 1.05 - 1.3 into the outermost layer of the sphere.

[0022] The present invention has the following advantages:

[0023] The artificial dielectric spherical lens made by the method provided by the present invention is extremely light in weight and has an ultra-wide frequency, can meet the application requirements of various antennas, has high product consistency, stable performance, and is particularly suitable for use in the mobile communication 4G, 5G, WIFI, multi-MIMO and even millimeter-wave mobile communication antenna industries. Description of the Drawings

[0024] The accompanying drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The schematic embodiments and descriptions thereof of the present application are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0025] Figure 1 is a schematic structural diagram of the artificial dielectric composite of the present application;

[0026] Figure 2 is a schematic diagram of the particle dispersion of the artificial dielectric composite of the present application;

[0027] Figure 3 is a flowchart of an embodiment of the manufacturing method of the artificial dielectric composite of the present application;

[0028] Figure 4 is a flowchart of an embodiment of the manufacturing method of the artificial dielectric lens of the present application;

[0029] Figure 5 is a schematic diagram of the hemispherical combination of the artificial dielectric lens of the present application;

[0030] Figure 6 is a schematic diagram of the whole-sphere combination of the artificial dielectric lens of the present application. Detailed Description of the Embodiments

[0031] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below in conjunction with the specific embodiments and corresponding drawings of the present application. Apparently, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0032] The following will describe in detail the technical solutions provided by each embodiment of the present application in conjunction with the accompanying drawings.

[0033] Figure 1 is a schematic structural diagram of the artificial dielectric composite of the present application.

[0034] The present application provides an artificial dielectric composite 10, which includes a plate 11, a metal layer 12, and a foaming material 13. The metal layer is located on the front and back sides of the plate and is distributed in a cross-shaped metal wire pattern. The foaming material is bonded to the outside of the metal layer.

[0035] Preferably, the cross-shaped metal wire distribution of the metal layer is formed by printed circuit technology on the surface of a printed circuit board or by electroplating on the surface of a PC board.

[0036] Preferably, the foaming material is any one of the following: EPE pearl cotton, EPS, and EVC material.

[0037] Preferably, the plate is a printed circuit board or a PC board substrate with a thickness of 0.05 to 0.3 mm.

[0038] For example, the artificial dielectric composite is made by plating metal wires on both sides of a printed circuit board with a thickness of 0.05 mm - 0.3 mm or on a PC board, and distributing them on the front and back sides of the plate. It is made by the principle of crossing warp and weft wires.

[0039] Specifically, for example, the number of the metal line segments is 2 to 6 on each of the front and back sides, and the width of each metal wire is approximately between 0.05 mm and 0.3 mm.

[0040] Preferably, the overall shape of the artificial dielectric composite is a cube with an edge length of 3 to 6 mm.

[0041] For example, when the foaming material used for the artificial dielectric composite is EPE pearl cotton or EPS or EVA material, it is bonded to the plate with warp and weft wires or the plate with metal wires plated on a PC board, and then the large piece of bonded material is cut into a cube with a size of 3 mm - 6 mm by a cutting machine.

[0042] Figure 2 It is a schematic diagram of the particle dispersion of the artificial dielectric composite of the present application. Figure 2 It shows a state where a large number of particles of the artificial dielectric composite are randomly dispersed.

[0043] Figure 3 It is a flowchart of an embodiment of the manufacturing method of the artificial dielectric composite of the present application.

[0044] The present application provides a manufacturing method of an artificial dielectric composite for manufacturing the artificial dielectric composite according to any one of the first aspects of the present application, including the following steps:

[0045] Step 101: Generate a cross-metal wire distribution on the surface of the plate by a printed circuit method or an electroplating method.

[0046] Print warp and weft wires on both sides of the printed circuit board. Use a printed circuit board with a thickness of 0.05 mm - 0.3 mm or plate metal wires on a PC board and distribute them on the front and back sides of the plate. It is made by the principle of crossing warp and weft wires. The width of the metal wire is approximately between 0.05 mm and 0.3 mm, and the spacing between the metal wires is between 0.3 mm and 3 mm. The size of the printed circuit board can be Nm * 1m * Xm.

[0047] Step 102: Bond a foaming material outside the metal layer to form a composite layer structure of the artificial dielectric composite with a set thickness.

[0048] Use the foaming material EPE pearl cotton or EPS or EVA material with one-sided adhesive to make a base material;

[0049] Bond the single-sided adhesive substrate in a double layer, and bond the sheet printed with metal wires in the middle of the substrate through a bonding machine to form a large artificial dielectric body conductive material.

[0050] Step 103: Cut the composite layer structure into a cube.

[0051] For example, use a shearer to cut the prepared material into cubes with a size of 3 mm to 6 mm. Preferably, it is a regular cube.

[0052] The size of different equivalent dielectric constants can be adjusted by the density of the metal wires. For example, repeat the above steps 102 to 103, and change the equivalent dielectric constant of the artificial dielectric composite by changing the width and / or spacing of the metal wires. Different artificial dielectric body composites with different dielectric constants can be manufactured according to the above method.

[0053] Figure 4 This is a flowchart of an embodiment of the method for manufacturing an artificial dielectric lens of the present application.

[0054] The present application also proposes a method for manufacturing an artificial dielectric lens, using the particles of the artificial dielectric composite of the present application, including the following steps:

[0055] Step 201: Construct the overall contour of the artificial dielectric lens, or decompose the artificial dielectric lens into a multi-layer structure and construct the contour of each layer structure.

[0056] For example, the contour shape of the artificial dielectric spherical lens is a sphere or a quasi-sphere or an ellipsoid or a quasi-ellipsoid.

[0057] Step 202: Fill the contour with the artificial dielectric composite.

[0058] Specifically, fill the contour with a large number of particles of the artificial dielectric composite. When the contour is full, the filling amount is determined by the volume of the contour; during filling, the body directions of the composites are randomly distributed.

[0059] Preferably, in the method of the present application, set the equivalent dielectric constant within the overall or each layer structure contour of the artificial dielectric lens; fill the contour with the artificial dielectric composite that meets the equivalent dielectric constant.

[0060] Preferably, the artificial dielectric lens is composed of a multi-layer structure with different equivalent dielectric constants, and the equivalent dielectric constant is distributed from high to low from the central layer to the outermost layer. For example, by requiring different dielectric constant conductive materials to be filled into a pre-prepared multi-layer spherical container, 2 to 20 spherical layers with different dielectric constants are arranged from the high dielectric constant to the low dielectric constant from the inner core of the sphere to the outer layer. The equivalent dielectric constant is 1.05 to 2.1.

[0061] Preferably, in the method of the present application, an artificial dielectric composite with an equivalent dielectric constant between 1.8 and 2.1 is filled in the central sphere; an artificial dielectric composite with an equivalent dielectric constant between 1.4 and 1.7 is filled in the middle layer of the sphere; and an artificial dielectric composite with a dielectric constant between 1.05 and 1.3 is filled in the outermost layer of the sphere.

[0062] In the embodiments of the present application, the values of the "equivalent dielectric constant" are all relative dielectric constants.

[0063] Step 203: The artificial dielectric spherical lens is combined with antennas of different frequency bands and inspected in a microwave anechoic chamber for measuring antenna performance. The gain, radiation pattern, various electrical indexes, and weight of the antenna are tested and compared with the predetermined values. The dielectric constant values of each layer or the dimensions of each hemispherical shell are adjusted until the design requirements are met, thereby forming an artificial dielectric spherical lens.

[0064] Therefore, the present application also proposes an artificial dielectric lens, which is made by filling the space formed by the contour of the artificial dielectric lens with particles of the artificial dielectric composite. Preferably, the contour of the artificial dielectric lens is spherical, ellipsoidal, or cylindrical.

[0065] Figure 5 It is a schematic diagram of the hemispherical combination of the artificial dielectric lens of the present application.

[0066] The densities of the artificial dielectric conductive materials with different dielectric constants are different. Different dielectric constant conductive materials are filled into the spherical container from the inside out to prepare a hemispherical lens 51.

[0067] After preparing the spherical shell sizes as shown in the following table, in accordance with the appendix Figure 5 According to the requirements, conductive materials with different dielectric constants are filled into the pre-prepared multi-layer hemispherical containers. From the high dielectric constant to the low dielectric constant, 1 to 5 layers of hemispherical shells with different dielectric constants are arranged from the inner core to the outer layer of the sphere. The first layer of hemispherical shell is filled with an artificial dielectric body conductive material with a dielectric constant of 2.0, the second layer of hemispherical shell is filled with an artificial dielectric body conductive material with a dielectric constant of 1.8, the third layer of hemispherical shell is filled with an artificial dielectric body conductive material with a dielectric constant of 1.6, the fourth layer of hemispherical shell is filled with an artificial dielectric body conductive material with a dielectric constant of 1.4, and the outermost fifth layer of hemispherical shell is filled with an artificial dielectric body conductive material with a dielectric constant of 1.15.

[0068] Number of sphere layers 1 2 3 4 5 Dielectric constant (εr) 2.0 1.8 1.6 1.4 1.15 Outer diameter of spherical shell (mm) 100 150 200 250 300 Inner diameter of spherical shell (mm) / 100 150 200 250

[0069] Figure 6 It is a schematic diagram of the whole spherical combination of the artificial dielectric lens of the present application.

[0070] Just combine the two hemispheres 51 and 52 into a whole spherical dielectric body. In this way, the two hemispherical containers are combined into a complete sphere. Through the center of the sphere, the containers of different spherical shapes are sleeved into a complete multi-layer spherical shape to manufacture a complete artificial dielectric spherical lens.

[0071] It should also be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, commodity or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, commodity or device. Without further limitation, the elements defined by the statement "including..." do not exclude the presence of additional identical elements in the process, method, commodity or device comprising the said elements.

[0072] The above are only the embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. An artificial medium composite, characterized in that, it is a cubic particle, comprising a plate, a metal layer, and a foaming material; the metal layer is located on the front and back of the plate, presenting a through network distributed in crossed metal wires, and is made by crossing warp and weft wires; a foaming material is adhesively bonded to the outside of the metal layer.

2. The artificial medium composite according to claim 1, characterized in that, the crossed metal wire distribution of the metal layer is made on the surface of a printed circuit board by printed circuit technology or by electroplating on the surface of a PC board.

3. The artificial medium composite according to claim 1, characterized in that, the foaming material is any one of the following: EPE pearl cotton, EPS, EVC material.

4. An artificial medium lens, characterized in that, the artificial medium composite according to any one of claims 1 to 3 is filled in the space formed by the contour of the artificial medium lens.

5. The artificial medium lens according to claim 4, characterized in that, the contour of the artificial medium lens is spherical, ellipsoidal or cylindrical.

6. A manufacturing method of an artificial medium composite for making the artificial medium composite according to any one of claims 1 to 3, characterized in that, it comprises the following steps: generating a crossed metal wire distribution on the surface of the plate by printed circuit method or electroplating method; adhesively bonding a foaming material to the outside of the metal layer to form a composite layer structure of the artificial medium composite with a set thickness; cutting the composite layer structure into cubes; changing the equivalent dielectric constant of the artificial medium composite by changing the width and / or spacing of the metal wires.

7. A manufacturing method of an artificial medium lens using the artificial medium composite according to any one of claims 1 to 3, characterized in that, it comprises the following steps: constructing the overall contour of the artificial medium lens, or decomposing the artificial medium lens into a multi-layer structure and constructing the contour of each layer structure; filling the artificial medium composite into the contour.

8. The manufacturing method of the artificial medium lens according to claim 7, characterized in that, setting the equivalent dielectric constant within the contour of the whole or each layer structure of the artificial medium lens; filling the artificial medium composite conforming to the equivalent dielectric constant into the contour.

9. The manufacturing method of the artificial medium lens according to claim 7, characterized in that, the artificial medium lens is composed of a multi-layer structure with different equivalent dielectric constants, and the equivalent dielectric constant is distributed from high to low from the central layer to the outermost layer, and the equivalent dielectric constant is 1.05 to 2.

1.

10. The manufacturing method of the artificial medium lens according to claim 7, characterized in that, filling the artificial medium composite with an equivalent dielectric constant between 1.8 and 2.1 into the central sphere; filling the artificial medium composite with an equivalent dielectric constant between 1.4 and 1.7 into the middle layer of the sphere; filling the artificial medium composite with a dielectric constant between 1.05 and 1.3 into the outermost layer of the sphere.

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