Lens antenna and method for preparing dielectric lens

Abstract

The present invention provides a method for preparing a lens antenna and a dielectric lens. The lens antenna comprises: a dielectric lens and a plurality of radiation units, wherein the plurality of radiation units are arranged around the outer side surface of the dielectric lens; the dielectric lens comprises a plurality of dielectric units, wherein the plurality of dielectric units are concentrically sleeved in sequence, and the dielectric constants of the plurality of dielectric units arranged in sequence from the inside to the outside decrease in sequence. The lens antenna provided by the present invention comprises a plurality of dielectric units, wherein the plurality of dielectric units are concentrically sleeved in sequence, and the dielectric constants of the plurality of dielectric units arranged in sequence from the inside to the outside decrease in sequence, wherein the plurality of radiation units are arranged around the outer side surface of the dielectric lens, and the refractive characteristics of the plurality of dielectric units are utilized to convert the non-plane waves emitted by the plurality of radiation units into plane waves, which is beneficial to improving the communication quality.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a method for preparing a lens antenna and a dielectric lens. Background Art

[0002] With the development of communication services, user data traffic has increased rapidly, which has put forward higher requirements on communication system capacity, transmission rate, etc. With the substantial increase in the number of users, the existing communication system faces the problem of limited system capacity leading to poor communication quality.

[0003] Lens antennas designed using geometric optics are used in mobile communications and satellite communications. Taking the mobile communications field as an example, placing multiple feed sources at the focal point of the lens antenna can achieve multi-beams, and the radiation characteristics of each beam are the same, so that the capacity of the cell communication system can be expanded. It has the characteristics of a simple network, a simplified structure, and high radiation efficiency.

[0004] The existing methods for preparing Luneburg lenses mainly include three categories: the first category uses a finite number of discrete shells, adjusts the material properties through process methods, controls the dielectric constants of different shells with a certain regular distribution, and after bonding the shells, realizes that the Luneburg lens has a dielectric constant that gradually changes from the inside to the outside; the second category is mainly to achieve different dielectric constants at different positions by punching holes in the dielectric material according to certain rules, and the different material densities caused by the different hole sizes; the third category is based on 3D printing technology, selects different raw materials for different layers, and prints them in layers according to the designed shape. The above methods have problems such as difficult to obtain raw materials, complex processes, low production efficiency, and high production costs. Summary of the invention

[0005] The present invention provides a lens antenna and a method for preparing a dielectric lens, which are used to solve the defects of the existing antenna, such as poor communication performance due to limited communication capacity, and complex manufacturing process and high production cost of the lens.

[0006] In a first aspect, the present invention provides a lens antenna, comprising: a dielectric lens and a plurality of radiation units, wherein the plurality of radiation units are arranged around an outer side surface of the dielectric lens;

[0007] The dielectric lens comprises a plurality of dielectric units, which are concentrically arranged in sequence, and the dielectric constants of the plurality of dielectric units arranged in sequence from the inside to the outside decrease in sequence.

[0008] According to a lens antenna provided by the present invention, the number of the dielectric units is six, and the dielectric constants of the six dielectric units arranged sequentially from the inside to the outside are ε 1 =1.9~2.1,ε 2 =1.6~1.8,ε3 =1.4~1.6,ε 4 =1.23~1.43,ε 5 =1.05~1.25,ε 6 =0.9~1.1.

[0009] According to a lens antenna provided by the present invention, the ε 1 =2, the ε 2 =1.7, the ε 3 =1.5, the ε 4 =1.33, the ε 5 =1.15, the ε 6 =1.

[0010] According to a lens antenna provided by the present invention, the six dielectric units arranged from inside to outside are sequentially a first dielectric unit, a second dielectric unit, a third dielectric unit, a fourth dielectric unit, a fifth dielectric unit and a sixth dielectric unit;

[0011] The inner diameter of the second dielectric unit is 1R1, the outer diameter of the second dielectric unit is 1.3R1, the inner diameter of the third dielectric unit is 1.3R1, the outer diameter of the third dielectric unit is 1.6R1, the inner diameter of the fourth dielectric unit is 1.6R1, the outer diameter of the fourth dielectric unit is 1.9R1, the inner diameter of the fifth dielectric unit is 1.9R1, the outer diameter of the fifth dielectric unit is 2.2R1, the inner diameter of the sixth dielectric unit is 2.2R1, and the outer diameter of the sixth dielectric unit is 2.5R1;

[0012] Wherein, R1 is the outer diameter of the first dielectric unit.

[0013] According to a lens antenna provided by the present invention, the dielectric lens is spherical or cylindrical.

[0014] According to a lens antenna provided by the present invention, the lens antenna further includes a dielectric cover, and the dielectric cover is disposed on the dielectric lens.

[0015] In a second aspect, the present invention further provides a method for preparing a dielectric lens, comprising: preparing a plurality of dielectric units;

[0016] The plurality of dielectric units are sequentially and concentrically arranged to form a dielectric lens;

[0017] The dielectric constants of the plurality of dielectric units arranged sequentially from the inside to the outside decrease sequentially.

[0018] According to a method for preparing a dielectric lens provided by the present invention, when the dielectric lens is spherical, preparing a plurality of dielectric units comprises:

[0019] preparing a top cover, a bottom cover, a plurality of flat plates, and a plurality of annular plates;

[0020] Wherein, the top cover, the bottom cover, the plurality of flat plates and the plurality of annular plates can be assembled into a spherical medium unit.

[0021] According to a method for preparing a dielectric lens provided by the present invention, the method of sequentially and concentrically arranging the plurality of dielectric units to form a dielectric lens comprises:

[0022] Assembling the top covers, the bottom covers, the multiple flat plates and the multiple annular plates of the multiple media units into multiple media plates;

[0023] The plurality of dielectric plates are stacked to form the dielectric lens.

[0024] According to the method for preparing a dielectric lens provided by the present invention, the thickness of each dielectric plate is 4 to 6 mm.

[0025] The invention provides a lens antenna and a method for preparing a dielectric lens. The dielectric lens comprises a plurality of dielectric units, which are concentrically arranged in sequence. The dielectric constants of the plurality of dielectric units arranged in sequence from the inside to the outside decrease in sequence. The plurality of radiation units are arranged around the outer side surface of the dielectric lens. The refractive characteristics of the plurality of dielectric units are utilized to convert non-plane waves emitted by the plurality of radiation units into plane waves, which is beneficial to improving communication quality. The dielectric lens is formed by stacking a plurality of dielectric plates, and raw materials are easy to obtain. The process is simple, the production cost is low, and it is beneficial to large-scale batch production. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a structural schematic diagram of the lens antenna provided by the present invention;

[0028] Figure 2 This is one of the layered schematic diagrams of the dielectric lens provided by the present invention;

[0029] Figure 3 is a schematic diagram of the layering of the upper hemisphere of the dielectric lens provided by the present invention;

[0030] Figure 4 is a schematic structural diagram of the nth dielectric plate provided by the present invention;

[0031] Figure 5This is the second layered schematic diagram of the dielectric lens provided by the present invention;

[0032] Reference numerals:

[0033] 1: dielectric lens; 2: dielectric cover;

[0034] 3: radiation unit; 4: first dielectric unit;

[0035] 5: second medium unit; 6: third medium unit;

[0036] 7: fourth medium unit; 8: fifth medium unit;

[0037] 9: the sixth dielectric unit; 10: the nth dielectric plate;

[0038] 11: the first dielectric plate; 12: the second dielectric plate;

[0039] 13: flat plate; 14: first annular plate;

[0040] 15: the second annular plate; 16: the third annular plate;

[0041] 17: the fourth annular plate; 18: the fifth annular plate. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] Combine the following Figures 1 to 5 A lens antenna according to an embodiment of the present invention is described.

[0044] like Figure 1 As shown, the lens antenna provided by the embodiment of the present invention comprises: a dielectric lens 1 and a plurality of radiation units 3, wherein the plurality of radiation units 3 are arranged around the outer side surface of the dielectric lens 1;

[0045] The dielectric lens 1 comprises a plurality of dielectric units, which are concentrically arranged in sequence, and the dielectric constants of the plurality of dielectric units arranged in sequence from the inside to the outside decrease in sequence.

[0046] Specifically, the dielectric lens 1 includes a plurality of dielectric units, the number of the dielectric units is greater than or equal to six, and the dielectric lens 1 may be spherical or cylindrical.

[0047] The following describes the configuration of the dielectric lens 1 when the dielectric lens 1 is spherical.

[0048] The dielectric lens 1 is a sphere, and includes a plurality of dielectric units. The dielectric unit located at the center of the sphere is a solid sphere, and the other dielectric units are all spheres with a receiving cavity, that is, the other dielectric units all have an inner wall and an outer wall.

[0049] The inner wall of each dielectric unit is arranged in abutment with the outer wall of the adjacent dielectric unit, and the outer wall of each dielectric unit is arranged in abutment with the inner wall of the adjacent dielectric unit. It can be understood that the dielectric unit located at the outermost side only needs to have its inner wall in abutment with the outer wall of the adjacent dielectric unit. Thus, a plurality of dielectric units are sequentially concentrically arranged to form a spherical dielectric lens 1.

[0050] The following describes the configuration of the dielectric lens 1 when the dielectric lens 1 is cylindrical.

[0051] A dielectric unit located at the center of the dielectric lens 1 is a solid cylinder, and the other dielectric units are hollow cylinders, that is, the other dielectric units have an inner wall and an outer wall.

[0052] In addition, multiple hollow cylinders are sequentially nested on the outside of the solid cylinder, and the inner wall of each hollow cylinder is fitted with the outer wall of the adjacent hollow cylinder, and the outer wall of each hollow cylinder is fitted with the inner wall of the adjacent hollow cylinder. It can be understood that the inner wall of the outermost hollow cylinder only needs to be fitted with the outer wall of the adjacent hollow cylinder. Thus, multiple dielectric units are sequentially concentrically arranged to form a cylindrical dielectric lens 1.

[0053] The dielectric constants of the plurality of dielectric units are all different. Specifically, the dielectric constants of the plurality of dielectric units sequentially arranged from the center of the dielectric lens 1 to the outer side surface decrease sequentially.

[0054] The multiple radiation units 3 are arranged around the outer side surface of the dielectric lens 1. The refractive characteristics of the multiple dielectric units can be used to convert the non-plane waves emitted by the multiple radiation units 3 into plane waves, which is beneficial to improving the communication quality of the lens antenna.

[0055] In an embodiment of the present invention, the dielectric lens 1 includes a plurality of dielectric units, which are concentrically arranged in sequence, and the dielectric constants of the plurality of dielectric units arranged in sequence from the inside to the outside decrease in sequence. The plurality of radiation units 3 are arranged around the outer side surface of the dielectric lens 1, and the refractive characteristics of the plurality of dielectric units are utilized to convert the non-plane waves emitted by the plurality of radiation units 3 into plane waves, which is beneficial to improving the communication quality of the lens antenna.

[0056] In an optional embodiment, the number of dielectric units is six, and the dielectric constants of the six dielectric units arranged from the inside to the outside are ε 1 =1.9~2.1,ε 2=1.6~1.8,ε 3 =1.4~1.6,ε 4 =1.23~1.43,ε 5 =1.05~1.25,ε 6 =0.9~1.1.

[0057] Furthermore, ε 1 =2,ε 2 =1.7,ε 3 =1.5,ε 4 =1.33,ε 5 =1.15,ε 6 = 1. The dielectric constant can be obtained by numerical fitting based on Fermat's principle and Snell's law.

[0058] Generally speaking, the more dielectric units arranged from the inside to the outside, the better the performance of the dielectric lens 1. However, an increase in the number will correspondingly increase the difficulty of production, material cost and production cycle. In the embodiment of the present invention, the number of dielectric units is six.

[0059] The thicknesses of the six dielectric units may be the same or different. For example, the thicknesses of the six dielectric units may be different, partially the same, or completely the same.

[0060] In an optional embodiment, the six medium units arranged from the inside to the outside are defined as a first medium unit 4 , a second medium unit 5 , a third medium unit 6 , a fourth medium unit 7 , a fifth medium unit 8 and a sixth medium unit 9 .

[0061] The outer diameter of the first dielectric unit 4 is R1, and the value of R1 is not specifically limited.

[0062] The inner diameter and outer diameter of the second dielectric unit 5 , the inner diameter and outer diameter of the third dielectric unit 6 , the inner diameter and outer diameter of the fourth dielectric unit 7 , the inner diameter and outer diameter of the fifth dielectric unit 8 , and the inner diameter and outer diameter of the sixth dielectric unit 9 are all multiples of the outer diameter of the first dielectric unit 4 , as shown below.

[0063] The inner diameter of the second dielectric unit 5 is 1R1, and the outer diameter of the second dielectric unit 5 is 1.3R1; the inner diameter of the third dielectric unit 6 is 1.3R1, and the outer diameter of the third dielectric unit 6 is 1.6R1; the inner diameter of the fourth dielectric unit 7 is 1.6R1, and the outer diameter of the fourth dielectric unit 7 is 1.9R1; the inner diameter of the fifth dielectric unit 8 is 1.9R1, and the outer diameter of the fifth dielectric unit 8 is 2.2R1; the inner diameter of the sixth dielectric unit 9 is 2.2R1, and the outer diameter of the sixth dielectric unit 9 is 2.5R1.

[0064] When the sizes of the first dielectric unit 4, the second dielectric unit 5, the third dielectric unit 6, the fourth dielectric unit 7, the fifth dielectric unit 8 and the sixth dielectric unit 9 are in the above multiple relationship, and the dielectric constant of the first dielectric unit 4 is 2, the dielectric constant of the second dielectric unit 5 is 1.7, the dielectric constant of the third dielectric unit 6 is 1.5, the dielectric constant of the fourth dielectric unit 7 is 1.33, the dielectric constant of the fifth dielectric unit 8 is 1.15, and the dielectric constant of the sixth dielectric unit 9 is 1, a model is established for the dielectric lens 1 to perform electromagnetic simulation. The horizontal plane radiation patterns of the lens antenna in the two states are obtained.

[0065] Table 1 is a comparison table of beam effects under two states, as shown below.

[0066] Table 1 Beam effect parameter table

[0067]

[0068] In the first state, the signal of the radiation unit 3 does not pass through the dielectric lens 1, and in the second state, the signal of the radiation unit 3 passes through the dielectric lens 1. By comparing the beam effects in the two states, it can be seen that the dielectric lens 1 has a strong convergence effect on the beam, and can convert the non-plane wave along the circular diameter direction into a plane wave through the dielectric lens 1. As the beams in the horizontal and vertical planes are narrowed, the gain of the lens antenna is increased by 10 to 11 dBi.

[0069] In an optional embodiment, the lens antenna further includes a dielectric cover 2 , and the dielectric cover 2 is disposed on the dielectric lens 1 .

[0070] The dielectric cover 2 is made of glass fiber reinforced plastic, PP material or PC material. The inner wall of the dielectric cover 2 is matched with the outer wall of the dielectric lens 1 , and the dielectric cover 2 is covered on the dielectric lens 1 .

[0071] When the dielectric lens 1 is spherical, the dielectric cover 2 can be made by dividing it into two cover shells, which is convenient for production and installation.

[0072] The embodiment of the present invention further provides a method for preparing a dielectric lens 1, comprising: preparing a plurality of dielectric units; sequentially and concentrically arranging the plurality of dielectric units to form the dielectric lens 1;

[0073] The dielectric constants of the plurality of dielectric units arranged sequentially from the inside to the outside decrease sequentially.

[0074] Specifically, the dielectric constant of each dielectric unit is different, and each dielectric unit can be made of common foaming material.

[0075] In the case where there are multiple dielectric units, multiple foaming materials with different dielectric constants are used to prepare the multiple dielectric units.

[0076] A plurality of dielectric units are concentrically arranged in sequence to form a dielectric lens 1, and the dielectric constants of the plurality of dielectric units arranged in sequence from the inside to the outside decrease in sequence.

[0077] In an optional embodiment, when the dielectric lens 1 is spherical, a plurality of dielectric units are prepared, including: preparing a top cover, a bottom cover, a plurality of flat plates, and a plurality of annular plates;

[0078] The top cover, the bottom cover, the plurality of flat plates and the plurality of annular plates can be assembled into a spherical medium unit.

[0079] Specifically, the top cover and the bottom cover refer to the parts at both ends of the spherical medium unit, the top cover and the bottom cover are symmetrically distributed about the central plane of the medium unit, and the top cover and the bottom cover have the same shape. The plurality of flat plates are symmetrically distributed about the central plane of the medium unit, and the plurality of annular plates are symmetrically distributed about the central plane of the medium unit.

[0080] The bottom cover, a plurality of flat plates, a plurality of annular plates and a top cover are stacked in corresponding positions to form a spherical medium unit, and the assembly process is simple.

[0081] The same dielectric unit is divided into multiple assembly units including a top cover, a bottom cover, multiple flat plates and multiple annular plates. The top cover, the bottom cover, multiple flat plates and multiple annular plates can be obtained from a foam plate with a dielectric constant that meets actual requirements. The material source of the dielectric unit is rich and the assembly process is simple.

[0082] It can be understood that the dielectric unit located at the center of the dielectric lens 1 is assembled from a top cover, a bottom cover and a plurality of flat plates.

[0083] In an optional embodiment, a plurality of dielectric units are sequentially and concentrically arranged to form a dielectric lens 1, including:

[0084] Assembling top covers, bottom covers, multiple flat plates and multiple annular plates of multiple media units into multiple media plates;

[0085] A plurality of dielectric plates are stacked to form a dielectric lens 1 .

[0086] The following takes the example that the dielectric lens 1 is composed of six dielectric units which are concentrically arranged in sequence to illustrate the preparation and assembly process of the dielectric lens 1.

[0087] The six dielectric units arranged from the inside to the outside are defined as a first dielectric unit 4 , a second dielectric unit 5 , a third dielectric unit 6 , a fourth dielectric unit 7 , a fifth dielectric unit 8 and a sixth dielectric unit 9 .

[0088] The dielectric constant of the first dielectric unit 4 is ε 1 , the dielectric constant of the second dielectric unit 5 is ε 2 , the dielectric constant of the third dielectric unit 6 is ε3 , the dielectric constant of the fourth dielectric unit 7 is ε 4 , the dielectric constant of the fifth dielectric unit 8 is ε 5 , the dielectric constant of the sixth dielectric unit 9 is ε 6 .

[0089] like Figure 2 As shown, specifically, the dielectric lens 1 is divided into 2n-1 dielectric plates, each layer having a thickness of D, from the top of the dielectric lens 1 to the central plane of the dielectric lens 1. The first dielectric plate 11, the second dielectric plate 12 to the nth dielectric plate 10 are arranged in sequence. The nth dielectric plate 10 is located at the central plane of the dielectric lens 1 and is symmetrically arranged about the central plane of the dielectric lens 1. The outer diameter of the nth dielectric plate 10 is the largest.

[0090] The thickness of each dielectric plate is 4 to 6 mm.

[0091] like Figure 3 As shown, the assembly process of the nth dielectric plate 10 is described below by taking the assembly of the nth dielectric plate 10 as an example. The nth dielectric plate 10 is composed of a flat plate 13 and five annular plates from the inside to the outside. The flat plate 13 and the five annular plates constitute the component unit of the nth dielectric plate 10, and the thickness of the flat plate 13 and the five annular plates is D.

[0092] The dielectric constant of the innermost plate 13 is ε 1 The dielectric constant of the first annular plate 14 arranged from the inside to the outside is ε 2 , the dielectric constant of the second annular plate 15 is ε 3 , the dielectric constant of the third annular plate 16 is ε 4 , the dielectric constant of the fourth annular plate 17 is ε 5 , the dielectric constant of the fifth annular plate 18 is ε 6 .

[0093] The dielectric constants are prepared in advance. 1 , ε 2 , ε 3 , ε 4 , ε 5 and ε 6 There are six kinds of foamed boards, each of which has a thickness of D. The foamed boards can be prepared by a foaming process.

[0094] A flat plate 13 and five annular plates can be respectively made of dielectric constants ε 1 , ε 2 , ε 3 , ε 4 , ε 5 and ε 6 Get it on the foam board.

[0095] Specifically, the dielectric constant ε 1 A flat plate 13 can be obtained by cutting the foamed plate with a dielectric constant of ε 2 The first annular plate 14 can be obtained by cutting the foamed plate with a dielectric constant of ε 3 The second annular plate 15 can be obtained by cutting the foamed plate with a dielectric constant of ε 4 The third annular plate 16 can be obtained by cutting the foam plate with a dielectric constant of ε 5 The fourth annular plate 17 can be obtained by cutting the foam plate with a dielectric constant of ε 6 The fifth annular plate 18 is obtained by cutting the foamed plate.

[0096] The first annular plate 14 is sleeved on the flat plate 13, the second annular plate 15 is sleeved on the first annular plate 14, the third annular plate 16 is sleeved on the second annular plate 15, the fourth annular plate 17 is sleeved on the third annular plate 16, and the fifth annular plate 18 is sleeved on the fourth annular plate 17, thereby assembling the nth dielectric plate 10.

[0097] The dielectric constants of the nth dielectric plate 10 are ε from the inside to the outside. 1 , ε 2 , ε 3 , ε 4 , ε 5 and ε 6 .

[0098] The top cover, bottom cover, flat plate and annular plate included in each medium plate can be obtained according to the method of obtaining the constituent units of the nth medium plate 10. The assembly of each medium plate can refer to the assembly method of the nth medium plate 10, which will not be repeated here.

[0099] It can be understood that the first dielectric plate 11 located at the top can be a dielectric plate having a dielectric constant of ε 6 The top cover.

[0100] like Figure 4 As shown, it can be understood that for the convenience of stacking, the nth dielectric plate 10 with the largest outer diameter is stacked upward in sequence to the first dielectric plate 11, and the nth dielectric plates 10 to the first dielectric plates 11 are stacked in sequence to form the upper hemisphere of the dielectric lens 1, and the other n-1 dielectric plates are stacked in sequence to form the lower hemisphere of the dielectric lens 1.

[0101] The dielectric cover 2 is composed of two equally divided cover shells, which are defined as a lower cover shell and an upper cover shell. The inner wall of the dielectric cover 2 is adapted to the outer wall of the dielectric lens 1. The dielectric lens 1 is placed in the dielectric cover 2, and the outer wall of the dielectric lens 1 and the inner wall of the dielectric cover 2 are in contact with each other, so as to facilitate the fixation of the dielectric lens 1.

[0102] The lower hemisphere formed by stacking n-1 dielectric plates in sequence is placed on the lower cover shell, and the upper hemisphere formed by stacking the nth dielectric plate 10 to the first dielectric plate 11 in sequence is placed on the lower hemisphere. The interface between the upper hemisphere and the lower hemisphere is completely fitted. At this time, the upper cover shell is placed on the upper hemisphere. The lower cover shell and the upper cover shell can be fixed by screwing or clamping, thereby realizing the fixation of the dielectric lens 1 and the dielectric cover 2.

[0103] like Figure 5 As shown, when the dielectric lens 1 is cylindrical, the dielectric lens 1 is divided into a plurality of dielectric plates with a thickness of D in each layer along its height direction, and the structural composition of each dielectric plate is the same as the structural composition of the nth dielectric plate 10.

[0104] In the embodiment of the present invention, each dielectric unit is composed of a top cover, a bottom cover, a plurality of flat plates and a plurality of annular plates. The raw materials are easy to obtain. The top covers, bottom covers, flat plates or annular plates of different dielectric units located at the same position of the dielectric lens 1 are concentrically nested and assembled into each dielectric plate in sequence, and then the plurality of dielectric plates are stacked in sequence to form the dielectric lens 1. The process is simple, the production cost is low, and it is conducive to large-scale batch production.

[0105] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A lens antenna, characterized in that: include: A dielectric lens and a plurality of radiation units, wherein the plurality of radiation units are arranged around an outer side surface of the dielectric lens; The dielectric lens comprises a plurality of dielectric units, the plurality of dielectric units are sequentially arranged concentrically, and the dielectric constants of the plurality of dielectric units sequentially arranged from the inside to the outside decrease sequentially; The dielectric lens is spherical, and is formed by stacking a plurality of dielectric plates in sequence; wherein the dielectric unit located at the center of the sphere is a solid sphere, and the other plurality of dielectric units are spheres with a receiving cavity; The medium unit includes a top cover, a bottom cover, a plurality of flat plates and a plurality of annular plates, the top cover and the bottom cover are symmetrically distributed relative to the central plane of the medium unit, and are used to form two ends of the spherical medium unit, the plurality of flat plates are symmetrically arranged relative to the central plane of the medium unit, and the plurality of annular plates are symmetrically arranged relative to the central plane of the medium unit; The lens antenna further comprises a dielectric cover, and the dielectric cover is disposed on the dielectric lens.

2. The lens antenna according to claim 1, characterized in that: The number of the dielectric units is six, and the dielectric constants of the six dielectric units arranged from the inside to the outside are respectively =1.9~2.1, =1.6~1.8, =1.4~1.6, =1.23~1.43, =1.05~1.25, =0.9~1.

1.

3. The lens antenna according to claim 2, characterized in that: Said =2, =1.7, =1.5, =1.33, =1.15, =1.

4. The lens antenna according to claim 2, characterized in that: The six medium units arranged from the inside to the outside are the first medium unit, the second medium unit, the third medium unit, the fourth medium unit, the fifth medium unit and the sixth medium unit; The inner diameter of the second dielectric unit is 1R1, the outer diameter of the second dielectric unit is 1.3R1, the inner diameter of the third dielectric unit is 1.3R1, the outer diameter of the third dielectric unit is 1.6R1, the inner diameter of the fourth dielectric unit is 1.6R1, the outer diameter of the fourth dielectric unit is 1.9R1, the inner diameter of the fifth dielectric unit is 1.9R1, the outer diameter of the fifth dielectric unit is 2.2R1, the inner diameter of the sixth dielectric unit is 2.2R1, and the outer diameter of the sixth dielectric unit is 2.5R1; Wherein, R1 is the outer diameter of the first dielectric unit.

5. A method for preparing a dielectric lens, characterized in that: include: preparing a plurality of media units; The plurality of dielectric units are sequentially and concentrically arranged to form a dielectric lens; The dielectric constants of the plurality of dielectric units arranged sequentially from the inside to the outside decrease sequentially; The dielectric lens is spherical, and the method of preparing a plurality of dielectric units comprises: preparing a top cover, a bottom cover, a plurality of flat plates, and a plurality of annular plates; Wherein, the top cover, the bottom cover, the plurality of flat plates and the plurality of annular plates can be assembled into a spherical medium unit; The method of sequentially and concentrically arranging the plurality of dielectric units to form a dielectric lens comprises: Assembling the top covers, the bottom covers, the multiple flat plates and the multiple annular plates of the multiple media units into multiple media plates; The plurality of dielectric plates are stacked to form the dielectric lens.

6. The method for preparing a dielectric lens according to claim 5, characterized in that: The thickness of each medium plate is 4-6 mm.

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