Electromagnetic band gap wave-absorbing structure and antenna oscillator assembly

Abstract

The utility model discloses an electromagnetic band gap wave-absorbing structure and an antenna oscillator assembly. The electromagnetic band gap wave-absorbing structure comprises a substrate and two groups of diffuse reflection units. The base body is provided with two non-coplanar mounting surfaces; the two groups of diffuse reflection units are respectively arranged on the two mounting surfaces, the diffuse reflection units in the same group are arranged at intervals, an avoiding gap is formed between every two adjacent diffuse reflection units, and the projection of the avoiding gap on the other mounting surface at least partially falls on the diffuse reflection unit in the other group. In the scheme, electromagnetic waves are continuously diffused back and forth between the two groups of diffuse reflection units which are arranged in a staggered manner, and are continuously absorbed and consumed in the back and forth diffuse reflection process, so that the wave absorbing effect is achieved, the influence of vibrators between columns in an antenna array is reduced, the narrow-spacing antenna index is optimized, and the narrow-spacing antenna is only composed of the base body and the two groups of diffuse reflection units. The structure is relatively simple, and production difficulty and cost are reduced.

Description

Technical Field

[0001] This utility model relates to the field of antenna vibrator technology, specifically to an electromagnetic bandgap absorbing structure and an antenna vibrator assembly. Background Technology

[0002] In narrow-pitch antenna arrays, the coupling between antenna elements is extremely strong, leading to a significant deterioration in antenna performance, including radiation pattern, cross-polarization, and inter-array isolation. Therefore, electromagnetic bandgap structures (EBGs) are typically used to eliminate the mutual coupling between the elements.

[0003] Publication number CN218448443U discloses an electromagnetic bandgap structure and its packaged antenna. The electromagnetic bandgap structure is arranged between adjacent antenna elements. A bent wire connects the edge wire and the center conductor of the electromagnetic bandgap element, which increases the transmission path of current from the edge wire to the center conductor. This increases the inductance in the equivalent resonant circuit of the electromagnetic bandgap structure, reduces the resonant frequency in the equivalent resonant circuit, improves the isolation between antenna elements, and reduces the mutual coupling effect between antenna elements.

[0004] However, the electromagnetic bandgap structure in the aforementioned patent includes a conductive ground plane, a dielectric layer, and an electromagnetic bandgap unit. The electromagnetic bandgap unit is composed of an edge conductor, a central conductor, and a bent conductor, which makes the electromagnetic bandgap structure relatively complex and increases the difficulty and cost of production. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose an electromagnetic bandgap absorbing structure to solve the technical problem that the electromagnetic bandgap structure in the prior art is relatively complex, which increases the difficulty and cost of production.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0007] In a first aspect, this utility model provides an electromagnetic bandgap absorbing structure, comprising:

[0008] The substrate has two non-coplanar mounting surfaces; and

[0009] Two sets of diffuse reflection units are respectively arranged on the two mounting surfaces. The diffuse reflection units in the same set are spaced apart, and a clearance gap is formed between two adjacent diffuse reflection units. The projection of the clearance gap on the other mounting surface at least partially falls on the diffuse reflection units of the other set.

[0010] In some embodiments, the two mounting surfaces are parallel to each other, and the orthographic projection of the clearance on the other mounting surface at least partially falls on the diffuse reflection unit of the other set.

[0011] In some embodiments, the two mounting surfaces are located on opposite sides of the substrate.

[0012] In some embodiments, the diffuse reflection unit is arranged in a circular shape.

[0013] In some embodiments, the plurality of diffuse reflection units in the same group are arranged in an array.

[0014] Secondly, this utility model also provides an antenna vibrator assembly, which includes a vibrator unit and an electromagnetic bandgap absorbing structure as described in any of the above claims, wherein the substrate is spaced apart on one side of the vibrator unit, and at least one of the mounting surfaces faces the vibrator unit.

[0015] In some embodiments, there are multiple oscillator units and multiple electromagnetic bandgap absorbing structures. A base is provided between any two adjacent oscillator units, and the two mounting surfaces on the base face the two adjacent oscillator units respectively.

[0016] In some embodiments, the electromagnetic bandgap absorbing structure is provided in two sets, with the substrates of the two sets spaced apart on opposite sides of the oscillator unit.

[0017] In some embodiments, the antenna vibrator assembly further includes a base plate, on which the vibrator unit and the two sets of substrates are mounted and located on the same side of the base plate.

[0018] In some embodiments, one side of the base plate has two mounting slots, and the two mounting slots are arranged at intervals.

[0019] The base has a fixed end face located between the two mounting surfaces, the fixed end face being placed in the mounting groove, and the vibrator unit being located on the side of the base plate where the mounting groove is provided.

[0020] Compared with existing technologies, the electromagnetic bandgap absorbing structure provided by this invention has multiple diffuse reflection elements spaced apart on two non-coplanar mounting surfaces of the substrate, with the clearance between two adjacent diffuse reflection elements facing the diffuse reflection element on the other mounting surface. Thus, when the electromagnetic bandgap absorbing structure of this solution is placed between two adjacent dipole elements of the antenna, with the two mounting surfaces facing the two dipole elements respectively, the electromagnetic waves emitted by the dipole elements can enter the substrate through the clearance between adjacent mounting surfaces and fall on the diffuse reflection element on the other mounting surface. Then, the electromagnetic waves continuously diffusely reflect back and forth between the two sets of staggered diffuse reflection elements, and are continuously consumed by energy absorption during this back-and-forth diffusion, thereby achieving the wave absorption effect. This reduces the influence of inter-row dipoles in the antenna array, optimizes the performance of narrow-pitch antennas, and, consisting only of the substrate and two sets of diffuse reflection elements, has a relatively simple structure, reducing production difficulty and cost. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of an electromagnetic bandgap absorbing structure provided in an embodiment of the present invention;

[0022] Figure 2 yes Figure 1 Side view of an electromagnetic bandgap absorbing structure;

[0023] Figure 3 yes Figure 2 Perspective view of an electromagnetic bandgap absorbing structure;

[0024] Figure 4 yes Figure 1 Front view of the matrix;

[0025] Figure 5 This is a schematic diagram of an antenna vibrator assembly provided in one embodiment of the present invention;

[0026] Figure 6 yes Figure 5 Exploded view of the antenna vibrator assembly.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Substrate; 11. Mounting surface; 12. Fixed end face; 2. Diffuse reflection unit; 2a. Clearance gap; 3. Vibrator unit; 4. Base plate; 4a. Mounting groove. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0030] To address the technical problem that the electromagnetic bandgap structure in the existing technology is relatively complex, which increases the difficulty and cost of production, this utility model provides an electromagnetic bandgap absorbing structure that can achieve the effect of absorbing waves, reduce the influence of inter-row elements in the antenna array, optimize the performance of narrow-pitch antennas, and has a relatively simple structure, reducing the difficulty and cost of production.

[0031] It should be noted that the electromagnetic bandgap absorbing structure described in this utility model is used in, but not limited to, antenna vibrator assemblies. For ease of explanation, this utility model only uses the application of the electromagnetic bandgap absorbing structure in antenna vibrator assemblies as an example. The principle of applying the electromagnetic bandgap absorbing structure to other types of equipment is essentially the same as that applied to antenna vibrator assemblies, and will not be elaborated here.

[0032] Please see Figures 1 to 4 , Figures 1 to 4This is a schematic diagram of an electromagnetic bandgap absorbing structure according to an embodiment of the present invention. The electromagnetic bandgap absorbing structure includes a substrate 1 and two sets of diffuse reflection units 2. The substrate 1 has two non-coplanar mounting surfaces 11. The two sets of diffuse reflection units 2 are respectively arranged on the two mounting surfaces 11, with the diffuse reflection units 2 in the same set spaced apart, and a clearance gap 2a is formed between two adjacent diffuse reflection units 2. The projection of the clearance gap 2a on the other mounting surface 11 at least partially falls on the diffuse reflection units 2 of the other set. It should be understood that each set of diffuse reflection units 2 has multiple units, and the multiple diffuse reflection units 2 in the same set are arranged at intervals.

[0033] In the electromagnetic bandgap absorbing structure provided by this utility model, multiple diffuse reflection units 2 are spaced apart on two non-coplanar mounting surfaces 11 of the substrate 1, and the clearance gap 2a between two adjacent diffuse reflection units 2 faces the diffuse reflection unit 2 on the other mounting surface 11. Thus, when the electromagnetic bandgap absorbing structure of this solution is placed between two adjacent vibrating elements 3 of the antenna, with the two mounting surfaces 11 facing the two vibrating elements 3 respectively, the electromagnetic waves emitted by the vibrating elements 3 can enter the substrate 1 through the clearance gap 2a of the adjacent mounting surfaces 11 and fall on the diffuse reflection unit 2 of the other mounting surface 11. Then, they are continuously diffusely reflected back and forth between the two sets of staggered diffuse reflection units 2. During the back and forth diffuse reflection process, the electromagnetic waves are continuously absorbed and consumed, thereby achieving the effect of wave absorption, reducing the influence of inter-row vibrating elements in the antenna array, optimizing the performance of narrow-pitch antennas, and consisting only of the substrate and two sets of diffuse reflection units, the structure is relatively simple, reducing production difficulty and cost.

[0034] In one embodiment, the two mounting surfaces 11 are parallel to each other, and the orthographic projection of the clearance gap 2a onto the other mounting surface 11 at least partially falls on the diffuse reflection unit 2 of another set.

[0035] In this embodiment, the two sets of mounting surfaces 11 are arranged parallel to each other, that is, the two sets of mounting surfaces 11 are arranged at relative intervals on the substrate 1, and the clearance gap 2a on one mounting surface 11 is directly opposite to the diffuse reflection unit 2 on the other mounting surface 11, thereby improving the efficiency of electromagnetic waves being continuously diffusely reflected between the diffuse reflection units 2.

[0036] It should be noted that the specific configuration of the substrate 1 is not limited, as long as it has two non-coplanar mounting surfaces 11. Specifically, the substrate 1 can be configured as a pentahedron, hexahedron, or hemisphere, or other forms.

[0037] In one embodiment, the substrate 1 is plate-shaped, with two mounting surfaces 11 located on opposite sides of the substrate 1.

[0038] In this embodiment, the substrate 1 is configured as a plate, and the plate-shaped substrate 1 forms two mounting surfaces 11 on opposite sides to reduce its space occupation. Specifically, in this solution, the substrate is a circuit board, and the diffuse reflection unit 2 can be made of metal to ensure compatibility with circuit board manufacturing processes.

[0039] It should be noted that the diffuse reflection unit 2 can be made of metal, glass, or a composite material. To improve the diffuse reflection capability of the diffuse reflection unit 2, its surface is roughened. Furthermore, the shape of the diffuse reflection unit 2 can be square, semi-circular, mushroom-shaped, or other shapes.

[0040] It should be understood that the electromagnetic wave is divided into two parts on the surface of the diffuse reflection unit 2. One part is diffusely reflected on the surface of the diffuse reflection unit 2, and the other part is absorbed by the diffuse reflection unit 2.

[0041] In one embodiment, the diffuse reflection unit 2 is arranged in a circle, and multiple diffuse reflection units 2 in the same group are distributed in an array.

[0042] In this embodiment, the diffuse reflection unit 2 is set to a circle to increase the area occupied by the diffuse reflection edge while ensuring the transmission gap of the mounting surface 11. In addition, in this solution, multiple diffuse reflection units 2 in the same group are arranged in an array to improve the wave absorption capability.

[0043] In addition, please see Figure 5 and Figure 6 This utility model also provides an antenna vibrator assembly, which includes a vibrator element 3 and an electromagnetic bandgap absorbing structure as described above. The substrate 1 is spaced apart on one side of the vibrator element 3, and at least one mounting surface 11 faces the vibrator element 3. It should be noted that the detailed structure of the electromagnetic bandgap absorbing structure of the antenna vibrator assembly can be found in the embodiments of the electromagnetic bandgap absorbing structure described above, and will not be repeated here. Since the electromagnetic bandgap absorbing structure described above is used in the antenna vibrator assembly of this utility model, the embodiments of the antenna vibrator assembly of this utility model include all the technical solutions of all embodiments of the electromagnetic bandgap absorbing structure described above, and the achieved technical effects are also completely the same, and will not be repeated here.

[0044] In this embodiment, the mounting surface 11 on the substrate 1 faces the oscillator unit 3 to effectively introduce electromagnetic waves emitted from the outside or itself into the substrate 1, where they are diffusely reflected within the staggered diffuse reflection units 2, achieving wave absorption and realizing the directivity of the oscillator unit 3. This reduces the influence of the electromagnetic waves emitted by the oscillator unit 3 on the outside world, while also reducing interference from external electromagnetic waves to the oscillator unit 3. It should be noted that the specific structure and principle of the oscillator unit 3 are existing technologies and will not be described in detail here.

[0045] In one embodiment, there are multiple oscillator units 3 and multiple electromagnetic bandgap absorbing structures. A base 1 is provided between any two adjacent oscillator units 3, and the two mounting surfaces 11 on the base 1 face the two adjacent oscillator units 3 respectively.

[0046] In this embodiment, multiple oscillator units 3 are provided and can be distributed at intervals. At the same time, a base 1 is provided between any two adjacent oscillator units 3, so that the electromagnetic waves radiated by the oscillator unit 3 to the adjacent oscillator unit 3 can enter the base 1 through the clearance gap 2a, and then diffusely reflect in the staggered diffuse reflection units 2 to achieve wave absorption.

[0047] In one embodiment, the electromagnetic bandgap absorbing structure is provided in two sets, with the substrates 1 of the two sets spaced apart on opposite sides of the oscillator unit 3.

[0048] In this embodiment, an electromagnetic bandgap absorbing structure is provided on each of the opposite sides of the oscillator unit 3. In this way, a certain amount of diffuse reflection can also be generated between the mounting surfaces 11 of the two substrates 1 that are close to the oscillator unit 3, thereby further improving the absorption capability.

[0049] In one embodiment, the antenna vibrator assembly further includes a base plate 4, with the vibrator unit 3 and two sets of bases 1 mounted on the base plate 4 and located on the same side of the base plate 4.

[0050] In this embodiment, the oscillator unit 3 and the two sets of bases 1 are simultaneously installed on the same side of the two sets of base plates 4 to facilitate assembly and ensure the relative stability between the base 1 and the oscillator unit 3.

[0051] In one embodiment, the base plate 4 has two mounting grooves 4a on one side, and the two mounting grooves 4a are spaced apart; the base 1 has a fixed end face 12 located between two mounting surfaces 11, the fixed end face 12 is placed in the mounting groove 4a, and the vibrator unit 3 is located on the side of the base plate 4 where the mounting groove 4a is located.

[0052] In this embodiment, the substrate 1 is installed in the mounting groove 4a of the base plate 4, so that the diffuse reflection unit 2 on the substrate 1 can sink into the mounting groove 4a, thereby enabling the electromagnetic waves emitted laterally by the oscillator unit 3 to be effectively received by the diffuse reflection unit 2, thus improving the wave absorption capability.

[0053] To better understand this utility model, the following is combined with... Figures 1 to 6 The technical solution of this utility model is described in detail below:

[0054] When the electromagnetic bandgap absorbing structure in this scheme is applied to an antenna array, at least one electromagnetic bandgap absorbing structure is arranged between any two adjacent dipole elements 3. When the electromagnetic waves radiated by the dipole element 3 to both sides enter the substrate 1 through the clearance gap 2a of the mounting surface 11, they are continuously diffusely reflected between the staggered diffuse reflection elements 2. During the diffuse reflection process, the electromagnetic waves are continuously absorbed and consumed, thereby achieving the absorption effect, reducing the influence of the inter-row dipoles in the array, optimizing the performance of narrow-pitch antennas, and the structure is relatively simple, reducing production difficulty and cost.

[0055] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. An electromagnetic bandgap wave absorber, characterized by, The electromagnetic band-gap wave-absorbing structure comprises: a base body having two non-coplanar mounting surfaces; and two groups of diffuse reflection units arranged on the two mounting surfaces respectively, the diffuse reflection units in the same group being arranged at intervals and forming an avoidance gap between two adjacent diffuse reflection units, the orthographic projection of the avoidance gap on the other mounting surface falling at least partially on the diffuse reflection units of the other group.

2. The EBG wave absorber of claim 1, wherein, The two mounting surfaces are parallel to each other, and the orthographic projection of the avoidance gap on the other mounting surface falls at least partially on the diffuse reflection units of the other group.

3. The EBG wave absorber of claim 2, wherein, The two mounting surfaces are located on opposite sides of the base body.

4. The EBG wave absorber of claim 1, wherein, The diffuse reflection units are arranged in a circular manner.

5. The EBG wave absorber of claim 1, wherein, The diffuse reflection units in the same group are arranged in an array.

6. An antenna element assembly, characterized by The antenna element assembly further comprises a base plate, and the vibrator units and the two groups of base bodies are mounted on the base plate and located on the same side of the base plate.

7. The antenna element assembly of claim 6, wherein, One side of the base plate has two mounting grooves, and the two mounting grooves are arranged at intervals.

8. The antenna element assembly of claim 6, wherein, The base body has a fixed end surface between the two mounting surfaces, the fixed end surface is placed in the mounting groove, and the vibrator unit is located on the side of the base plate provided with the mounting groove.

9. The antenna element assembly of claim 8, wherein, ​ 10. The antenna element assembly of claim 9, wherein, ​ ​

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