Flexible foldable structure antenna surface

Abstract

The utility model discloses a flexible foldable structure antenna surface, which relates to the technical field of antenna surface materials and comprises an antenna surface main body, the antenna surface main body sequentially comprises a first TPU (thermoplastic polyurethane) layer, a conductive layer and a second TPU layer from inside to outside, and the conductive layer is carbon fiber woven cloth. According to the utility model, the antenna surface with the flexible foldable structure is arranged, so that the antenna surface is endowed with overall flexibility and can be smoothly unfolded and folded, the folding times are more than 100 times, and no crease is generated; wherein the first TPU layer and the second TPU layer are thermoplastic elastomers, and the first TPU layer is softer than the second TPU layer, so that better toughness is provided for the inner surface, and smooth unfolding and folding of the antenna surface are facilitated; the structure is reasonable and scientific, the manufacturing is simple, the sheet resistance of the conducting layer is 0.80 omega mm < 2 > / m, and the electromagnetic wave gain reflection requirement of the X-band antenna surface can be met.

Description

Technical Field

[0001] This utility model relates to the field of antenna surface material technology, specifically to a flexible foldable antenna surface. Background Technology

[0002] Currently, foldable umbrella-shaped antenna surfaces are generally composed of flexible metal mesh, which is particularly suitable for use in space. However, for use on the ground, they require multiple folding and unfolding processes. The mesh structure is easily damaged, and repeated folding produces obvious creases, affecting the accuracy of repeated unfolding of the antenna surface. Long-term exposure of the metal mesh to the complex and changing natural environment can easily cause oxidation and corrosion, resulting in a rough surface that severely affects the transmission and reception of electromagnetic signals. This requires focused attention and improvement.

[0003] To address the shortcomings of metal mesh antenna surfaces, the mainstream approach in the market is to use ultra-thin organic flexible film materials. Since antennas must be stretched flat during application, the array material must possess high mechanical strength and good adaptability to spatial environments. Currently, domestic and international organizations generally choose polyimide film as the flexible antenna array material. However, because polyimide film is non-conductive and cannot transmit electromagnetic waves, a metal film must be placed on its surface to meet the requirements of the array antenna. But the compatibility between polyimide film and metal film is poor; repeated folding easily causes bulging and delamination of the metal film layer, failing to meet the stringent requirements for receiving and reflecting electromagnetic wave signals. Therefore, it is necessary to develop a new flexible material that can replace the metal mesh of umbrella-shaped antennas, allowing for both folded and unfolded antenna states, and ensuring that the antenna accuracy stabilizes after repeated folding and unfolding. To this end, we propose a flexible, foldable antenna surface structure. Utility Model Content

[0004] In view of the problems existing in the above-mentioned flexible foldable antenna surface, this utility model is proposed.

[0005] Therefore, the purpose of this invention is to provide a flexible foldable antenna surface that solves the problem that the compatibility between polyimide film and metal film is poor, and that repeated folding can easily cause bulging of the metal film layer and separation between layers, which cannot meet the stringent requirements of the system for receiving and reflecting electromagnetic wave signals.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A flexible foldable antenna surface includes an antenna surface body, which comprises a first TPU layer, a conductive layer, and a second TPU layer from the inside out, wherein the conductive layer is a carbon fiber woven fabric.

[0008] Preferably, the thickness of the first TPU layer is 0.10~0.20mm and the hardness is 40~70A.

[0009] Preferably, the conductive layer is made of 1K plain weave T300 carbon fiber woven fabric with a thickness of 0.10~0.15mm and an areal density of 90~110g / m³. 2 .

[0010] Preferably, the thickness of the second TPU layer is 0.10~0.20mm and the hardness is 75~85A.

[0011] Preferably, the thickness of the antenna surface body is 0.25~0.50 mm.

[0012] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0013] This invention can be applied to flexible foldable antennas, giving the antenna surface overall flexibility, allowing it to be smoothly unfolded and folded, with more than 100 folds without creases. 2. In this invention, both the first and second TPU layers are thermoplastic elastomers, and the first TPU layer is softer than the second TPU layer, providing better toughness to the inner surface of the structure, which is beneficial for the smooth unfolding and folding of the antenna surface.

[0014] 3. This utility model has a reasonable and scientific overall structure, is simple to manufacture, and has a sheet resistivity of 0.80 Ω•mm². 2 / m), which can meet the electromagnetic wave gain and reflection requirements of the X-band antenna surface. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Explanation of reference numerals in the attached figures:

[0018] 1. First TPU layer; 2. Conductive layer; 3. Second TPU layer. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0020] This utility model discloses a flexible foldable antenna surface.

[0021] This utility model provides, for example Figure 1The antenna surface shown is a flexible foldable structure, including an antenna surface body. The antenna surface body includes a first TPU layer 1, a conductive layer 2 and a second TPU layer 3 from the inside to the outside. The conductive layer 2 is a carbon fiber woven fabric.

[0022] The flexible foldable antenna surface of this utility model has a first TPU layer 1 with a thickness of 0.10~0.20mm and a hardness of 40~70A.

[0023] This invention discloses a flexible, foldable antenna surface, wherein the conductive layer 2 is made of 1K plain weave T300 carbon fiber woven fabric with a thickness of 0.10~0.15mm and an areal density of 90~110g / m³. 2 ;

[0024] The flexible foldable antenna surface of this utility model has a second TPU layer 3 with a thickness of 0.10~0.20mm and a hardness of 75~85A.

[0025] The present invention discloses a flexible foldable antenna surface, wherein the thickness of the main body of the antenna surface is 0.25~0.50 mm.

[0026] Example 1

[0027] like Figure 1 As shown, this utility model discloses a flexible foldable antenna surface, including an antenna surface body. The antenna surface body comprises, from the inside out, a first TPU layer 1, a conductive layer 2, and a second TPU layer 3. The conductive layer 2 is made of carbon fiber woven fabric. First, the first TPU layer (thickness 0.10mm, hardness 40A) is laid on the surface of the preheated arc-shaped antenna surface. Then, 1K plain weave T300 carbon fiber woven fabric (thickness 0.10mm, areal density 90g / m³) is laid on top of it. 2 The conductive layer is first applied, and then a second TPU layer (0.10mm thick, 75A hardness) is applied to its surface. The bag is then sealed in a vacuum bag and formed in one piece using a vacuum bag autoclave molding process. The thickness after molding is 0.25mm.

[0028] Example 2

[0029] Based on Example 1, such as Figure 1 As shown, this utility model discloses a flexible foldable antenna surface, including an antenna surface body. The antenna surface body comprises, from the inside out, a first TPU layer 1, a conductive layer 2, and a second TPU layer 3. The conductive layer 2 is made of carbon fiber woven fabric. First, the first TPU layer (thickness 0.15mm, hardness 50A) is laid on the surface of the preheated arc-shaped antenna surface. Then, 1K plain weave T300 carbon fiber woven fabric (thickness 0.15mm, areal density 110g / m³) is laid on top of it. 2The conductive layer is first applied, and then a second TPU layer (0.15mm thick, 80A hardness) is applied to its surface. The bag is then sealed in a vacuum bag and formed in one piece using a vacuum bag autoclave molding process. The thickness after molding is 0.40mm.

[0030] Example 3

[0031] Based on Example 2, such as Figure 1 As shown, this utility model discloses a flexible foldable antenna surface, including an antenna surface body. The antenna surface body comprises, from the inside out, a first TPU layer 1, a conductive layer 2, and a second TPU layer 3. The conductive layer 2 is made of carbon fiber woven fabric. First, the first TPU layer (thickness 0.20mm, hardness 70A) is laid on the surface of the preheated arc-shaped antenna surface. Then, 1K plain weave T300 carbon fiber woven fabric (thickness 0.15mm, areal density 110g / m³) is laid on top of it. 2 The conductive layer is first applied, and then a second TPU layer (0.20mm thick, 85A hardness) is applied to its surface. The bag is then sealed in a vacuum bag and formed in one piece using a vacuum bag autoclave molding process. The resulting thickness is 0.50mm.

[0032] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A flexible, foldable antenna surface, comprising an antenna surface body, characterized in that, The antenna surface body consists of a first TPU layer (1), a conductive layer (2), and a second TPU layer (3) from the inside out. The conductive layer (2) is made of carbon fiber woven fabric.

2. The flexible foldable antenna surface according to claim 1, characterized in that, The thickness of the first TPU layer (1) is 0.10~0.20mm and the hardness is 40~70A.

3. The flexible foldable antenna surface according to claim 1, characterized in that, The conductive layer (2) is a 1K plain weave T300 carbon fiber woven fabric with a thickness of 0.10~0.15mm and a surface density of 90~110g / m³. 2 .

4. The flexible foldable antenna surface according to claim 1, characterized in that, The second TPU layer (3) has a thickness of 0.10~0.20mm and a hardness of 75~85A.

5. The flexible foldable antenna surface according to claim 1, characterized in that, The thickness of the antenna surface body is 0.25~0.50 mm.

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