Wave-absorbing assembly and electromagnetic darkroom

Abstract

The utility model relates to a kind of wave-absorbing assembly and electromagnetic darkroom, belong to the technical field of electromagnetic compatibility test.It solves electromagnetic darkroom wave-absorbing efficiency and maintenance problem by grid-shaped arrangement modular unit;Specifically, each absorbing unit adopts split design: the first wave-absorbing part is fixed on the substrate, and the replaceable second wave-absorbing part with wedge shape is connected vertically above the first wave-absorbing part through interference fit convex-concave structure;Annular wave-absorbing cavity with built-in concave-convex surface is formed between adjacent units, forcing multi-path reflection attenuation of gap electromagnetic wave.The utility model is combined with the grid substrate of shielding wall integrated molding and configures absorbing unit on the substrate, realizes efficient absorption of electromagnetic wave and local replacement of wedge body, significantly reduces secondary reflection and maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic compatibility testing technology, and in particular to an absorbing component and an electromagnetic anechoic chamber. Background Technology

[0002] With the development of electromagnetic compatibility testing technology, wave absorption technology based on wedge-shaped absorbing units has emerged. This technology uses the wedge-shaped design to allow more incident electromagnetic waves to enter the interior of the material, utilizes the multiple reflection attenuation mechanism to achieve energy loss, and relies on a strong electromagnetic wave absorber to achieve efficient energy conversion, ultimately significantly reducing the energy of transmitted electromagnetic waves.

[0003] In related technologies, a common approach is to assemble multiple wedge-shaped absorbers closely arranged on a base to form a continuous absorbing layer through physical stacking. Meanwhile, to ensure structural stability, the absorbing units are often constructed using an integrated molding process to create an integral absorbing device.

[0004] However, the aforementioned wedge-shaped microwave absorbing device has the following problems:

[0005] Firstly, structural gaps still exist between the closely arranged wedge-shaped absorbers, and electromagnetic waves that are not completely attenuated will form secondary reflections on the surfaces of adjacent units, resulting in a decrease in absorption performance.

[0006] Secondly, the wedge-shaped absorbing unit generally lacks protective measures at its tip. When the tip is damaged, the entire absorbing unit must be replaced because it is a one-piece structure, which significantly increases maintenance costs. Utility Model Content

[0007] In response to the shortcomings of the existing production technology, the applicant provides an absorbing component and an electromagnetic anechoic chamber, which not only enhances the absorbing efficiency but also reduces maintenance costs by requiring only partial replacement when the tip of the absorbing unit is damaged.

[0008] The technical solution adopted in this utility model is as follows:

[0009] A microwave absorbing component includes multiple microwave absorbing units arranged in a grid pattern;

[0010] Each of the aforementioned absorbing units, from bottom to top, includes a first absorbing part and a second absorbing part detachably disposed above the first absorbing part;

[0011] The bottom surface of the second absorbing part is provided with a first connecting part, and the top surface of the first absorbing part is provided with a second connecting part. The first connecting part and the second connecting part are vertically aligned and connected by an interference fit.

[0012] There is an absorbing cavity between two adjacent absorbing units, and the absorbing cavity is opened between the two corresponding first absorbing parts;

[0013] The cross-section of the absorbing cavity is an annular cavity structure, and the inner surface of the absorbing cavity is provided with concave and convex surfaces to attenuate electromagnetic waves by reflection within the cavity.

[0014] As a further improvement to the above technical solution:

[0015] In one embodiment, the first connecting portion is a vertically downward protruding structure.

[0016] In one embodiment, the second connecting part is a vertically downward sinking structure, and the protruding structure and the sinking structure are nested together by an interference fit.

[0017] In one embodiment, the second absorbing part is a wedge-shaped absorbing structure.

[0018] On the other hand, this application also provides an electromagnetic anechoic chamber, comprising:

[0019] Shielding wall;

[0020] Multiple substrates are fixedly installed on the shielding wall and arranged in a grid pattern;

[0021] And the aforementioned absorbing component, wherein the absorbing component is disposed on the substrate.

[0022] In one embodiment, the substrate and the shielding wall are integrally formed.

[0023] In one embodiment, an adhesive layer is provided between the absorbing component and the substrate.

[0024] The beneficial effects of this utility model are as follows:

[0025] This invention features a compact structure. The absorbing assembly employs multiple absorbing units arranged in a grid pattern, each unit consisting of a first absorbing section and a second absorbing section. An absorbing cavity is formed between two adjacent absorbing units, located between the two first absorbing sections. The cavity has a ring-shaped cross-section and an inner surface with uneven surfaces to increase the reflection path and scattering of electromagnetic waves within the cavity. The second absorbing section is a wedge-shaped absorbing structure; its wedge design guides the incident electromagnetic waves deep into the material, achieving multiple reflections and attenuation. The uneven inner surface and ring-shaped structure of the absorbing cavity effectively capture electromagnetic waves incident from the gaps between adjacent units. The repeated reflections of the electromagnetic waves within the cavity significantly enhance the attenuation effect, reduce secondary reflections back to the test environment, improve the overall absorbing performance of the anechoic chamber, and further ensure the accuracy of electromagnetic compatibility testing.

[0026] This utility model also has the following advantages:

[0027] The absorbing unit of this utility model adopts a split design. The first absorbing part is fixed on the substrate, and the second absorbing part is detachably connected to it. The first connecting part and the second connecting part are nested together by interference fit. The second absorbing part is wedge-shaped and is a vulnerable part. It can be disassembled and replaced independently, which greatly reduces maintenance costs. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the layout of the substrate assembly of this utility model.

[0029] Figure 2 This is a schematic diagram showing the mating state of the substrate and the microwave absorbing component of this utility model.

[0030] Figure 3 This is a schematic diagram of the substrate assembly of this utility model.

[0031] Wherein: 100, shielding wall; 200, substrate; 300, absorbing unit;

[0032] 310, First absorbing part; 320, Second absorbing part; 330, First connecting part; 340, Second connecting part; 350, Absorbing cavity. Detailed Implementation

[0033] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0034] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] When using the terms “including,” “having,” and “comprising” as described herein, another component may be added unless explicitly qualifying terms such as “only,” “consisting of,” etc. are used. Unless otherwise stated, singular terms may include plural forms and should not be construed as having a quantity of one.

[0037] It should be understood that although the terms "first," "second," etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, without departing from the scope of this invention, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

[0038] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the components are shown in the drawings only as examples and not necessarily to actual scale.

[0039] like Figures 1-3 The accompanying drawing shows a schematic diagram of an electromagnetic anechoic chamber according to an embodiment of the present invention; for ease of description, the drawing only shows the structure related to the embodiment of the present invention.

[0040] This application provides an electromagnetic anechoic chamber, the main body of which is a metal shielded wall 100, and the inner surface of which is integrally formed with a substrate 200 arranged in a rectangular grid pattern; each grid unit is equipped with a wave-absorbing unit 300.

[0041] In some embodiments, the absorbing unit 300 is composed of a first absorbing part 310 and a second absorbing part 320: the first absorbing part 310 is fixed to the substrate 200 by an adhesive layer; the second absorbing part 320 has a wedge-shaped structure, and its bottom first connecting part 330 and the top second connecting part 340 of the first absorbing part 310 are connected by an interference fit.

[0042] Specifically, the first connecting part 330 has a structure of a protrusion that is vertically downward, and the second connecting part has a structure of a groove that is vertically downward.

[0043] Please continue reading. Figures 2-3 In some embodiments, an absorbing cavity 350 with an annular cross-section is formed between the first absorbing portions 310 of two adjacent absorbing units 300. The inner surface of the cavity is provided with densely packed uneven surfaces, so that electromagnetic waves incident from the gap between the units are reflected and attenuated through multiple paths within the cavity.

[0044] In some embodiments, the shielding wall 100 is used to provide an electromagnetic shielding environment and suppress external interference.

[0045] In some embodiments, the substrate 200 is arranged in a grid pattern to support the wave-absorbing unit 300, and is integrally formed with the shielding wall 100 to ensure structural rigidity.

[0046] In some embodiments, the first absorbing part 310 serves as a basic absorbing body, enclosing and forming an absorbing cavity 350.

[0047] In some embodiments, the second absorbing part 320 has a wedge structure that guides electromagnetic waves deep into the material and can be disassembled and replaced separately if damaged.

[0048] In some embodiments, the annular cavity of the absorbing cavity 350, in conjunction with the concave and convex surfaces, captures and dissipates the gap leakage electromagnetic waves.

[0049] In practice, the installation process of this utility model is as follows:

[0050] During installation, the first absorbing part 310 is bonded and fixed to the grid position of the substrate 200, and then the second absorbing part 320 is vertically pressed onto the first absorbing part 310, so that the first connecting part 330 and the sink structure 340 are interference fit.

[0051] In practice, the maintenance process of this utility model is as follows:

[0052] When the tip of the second absorbing part 320 is damaged, it can be pulled upwards and replaced with a new part without disassembling the first absorbing part 310.

[0053] In summary, this utility model, through the synergistic effect of the split-type absorbing unit 300 and the absorbing cavity 350, combines the advantages of high absorption efficiency and low maintenance cost, meeting the accuracy requirements of electromagnetic anechoic chamber testing.

[0054] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The embodiments described above merely illustrate the implementation of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A wave-absorbing component, characterized in that, It includes multiple absorbing units (300) arranged in a grid pattern; Each of the aforementioned absorbing units (300) includes, from bottom to top, a first absorbing part (310) and a second absorbing part (320) detachably disposed above the first absorbing part (310); The bottom surface of the second absorbing part (320) is provided with a first connecting part (330), and the top surface of the first absorbing part (310) is provided with a second connecting part (340). The first connecting part (330) and the second connecting part (340) are vertically aligned and connected by an interference fit. There is an absorbing cavity (350) between two adjacent absorbing units (300), and the absorbing cavity (350) is opened between two corresponding first absorbing parts (310); The absorbing cavity (350) is an annular cavity structure, and the inner surface of the absorbing cavity (350) is provided with concave and convex surfaces to attenuate electromagnetic waves by reflection within the cavity.

2. The wave-absorbing assembly of claim 1, wherein, The first connecting part (330) is a protruding structure that extends vertically downward.

3. The wave-absorbing assembly of claim 2, wherein, The second connecting part (340) is a vertically downward sinking structure, and the protruding structure and the sinking structure are nested and connected by an interference fit.

4. The wave-absorbing assembly of claim 1, wherein, The second absorbing part (320) is a wedge-shaped absorbing structure.

5. An electromagnetic anechoic chamber, characterized in that, include: Shielding wall (100); Multiple substrates (200) are fixedly installed on the shielding wall (100) and arranged in a grid pattern; And the absorbing component as described in any one of claims 1-4, wherein the absorbing component is disposed on the substrate (200).

6. The electromagnetic anechoic chamber according to claim 5, characterized in that, The substrate (200) and the shielding wall (100) are integrally formed.

7. The electromagnetic darkroom of claim 5, wherein, An adhesive layer is provided between the absorbing component and the substrate (200).

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