Umbrella-shaped antenna surface structure

Abstract

The utility model provides an umbrella-shaped antenna surface structure, which comprises a flexible antenna arc surface layer, a plurality of reinforcing layers and reinforcing ribs, the flexible antenna arc surface layer is an umbrella-shaped structure with a through hole in the middle, and the plurality of reinforcing layers are laid on the flexible antenna arc surface layer at intervals; and the plurality of reinforcing ribs are uniformly laid at intervals along the circumferential direction of the flexible antenna arc surface layer and are used for fixedly connecting the flexible antenna arc surface layer with the reinforcing layer. According to the utility model, the reinforcing layers are made of the toughened epoxy resin unidirectional carbon fiber prepreg, the placement direction is perpendicular to the reinforcing ribs, and the reinforcing layers are arranged at intervals, so that a reinforcing structure similar to a spider net structure is formed, and the arrangement of the reinforcing structure is beneficial to providing a strong supporting effect in the longitudinal and transverse directions when the antenna surface is unfolded; the overall stability when the flexible antenna surface is unfolded is maintained, the surface precision of the antenna surface is improved, the structural arrangement is reasonable and scientific, the weight of the antenna surface is light, and the surface precision is high.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of antenna, concretely relates to a umbrella-like antenna surface structure. BACKGROUND

[0002] As a kind of wireless communication equipment, antenna plays huge economic and social benefits in aerospace, meteorology, communication, military and other fields.

[0003] One of the development trends of space antenna is to realize its repeatable folding and unfolding, typical umbrella-like antenna is composed of driving device, transmission device, support rib, main and auxiliary surface cable net, cable net is attached to support rib, antenna reaches predetermined orbit, and outside support rib is released to form complete reflecting surface

[0004] At present, foldable umbrella-like antenna surface is generally composed of flexible metal net, especially suitable for use in space, and its net structure is easily damaged and produces obvious creases when being used on ground after being folded and unfolded for many times, which affects the unfolding precision of antenna surface.

[0005] In view of the deficiency of metal net antenna surface, the mainstream on market is to use ultra-thin organic flexible film material. Since antenna must be tensioned and flattened when being applied, therefore, array surface material is required to have higher mechanical strength and good space environmental adaptability. At present, polyimide film is selected as flexible antenna array surface material by relevant units at home and abroad. Polyimide film does not have conductivity and cannot transmit electromagnetic wave, and it must be plated with metal film on its surface to meet the requirements of array antenna, but polyimide film and metal film have poor compatibility, and metal film layer is easily detached after being folded for many times, which cannot meet the requirements of system receiving and reflecting electromagnetic wave signal. Therefore, it is necessary to develop a new type of flexible material that can replace metal net, replace the metal net of umbrella-like antenna, meet the requirements of antenna storage and unfolding, and the precision of antenna can tend to be stable after repeated storage and unfolding actions. In view of the form of umbrella-like antenna surface structure, related material, complex packaging technology requirements and the like, it is necessary to carry out design research on thin film with high flexibility, high precision, light weight and good conductivity. UTILITY MODEL CONTENTS

[0006] In view of the problems in prior art, the utility model aims at providing a umbrella-like antenna surface structure.

[0007] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0008] A umbrella-like antenna surface structure, including flexible antenna circular arc surface layer, reinforcing layer, reinforcing rib, the flexible antenna circular arc surface layer is umbrella-like structure with through hole in the middle,

[0009] The reinforcing layers are arranged in multiple, and the multiple reinforcing layers are arranged on the flexible antenna arc surface layer in intervals; the reinforcing ribs are arranged in multiple, and the multiple reinforcing ribs are arranged on the flexible antenna arc surface layer in intervals along the circumferential direction of the flexible antenna arc surface layer, and are used for fixing and connecting the flexible antenna arc surface layer and the reinforcing layers.

[0010] Preferably, the flexible antenna arc surface layer is a toughened epoxy resin carbon fiber single-layer structure, and the thickness is 0.15-0.20 mm.

[0011] Further, the reinforcing layers are circular ring structures, and the multiple reinforcing layers are arranged on the flexible antenna arc surface layer in intervals from the center of the flexible antenna arc surface layer to the outside.

[0012] More preferably, the reinforcing layers are unidirectional toughened epoxy resin carbon fiber layers, the arrangement direction is perpendicular to the reinforcing ribs, the thickness of the reinforcing layer is 0.08-0.12 mm, the width is 10-20 mm, and the interval distance between adjacent reinforcing layers is 20-30 mm.

[0013] Preferably, the reinforcing ribs are T-shaped carbon fiber composite profiles, the width is 20-30 mm, the height is 20-30 mm, and the plate thickness is 0.3-0.5 mm.

[0014] Further, the multiple reinforcing ribs are arranged in intervals of 15-20 degrees along the radius direction of the flexible antenna arc surface layer.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] (1) the utility model discloses a toughened epoxy resin 3k plain weave carbon fiber single layer, and the antenna surface is flexible as a whole, and can be smoothly unfolded and folded.

[0017] (2) the reinforcing layer of the utility model is a toughened epoxy resin unidirectional carbon fiber prepreg, and the arrangement direction is perpendicular to the reinforcing ribs; the reinforcing layer is arranged in intervals, and a reinforcing structure similar to a spider web structure is formed; the reinforcing structure is arranged to provide longitudinal and transverse support at the same time when the antenna surface is unfolded, to keep the stability of the flexible antenna surface when unfolded, and to improve the surface precision of the antenna surface.

[0018] The above description is only a summary of the technical scheme of the utility model, in order to more clearly understand the technical means of the utility model, and the content of the specification can be implemented, and the following preferred embodiments of the utility model are described in detail in combination with the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0020] Figure 1 The present application is an umbrella-shaped antenna surface structure.

[0021] Mark explanation:

[0022] 1, flexible antenna arc surface layer;

[0023] 2, reinforcing layer;

[0024] 3, reinforcing rib.

[0025] In order to make the above-mentioned purpose, features and advantages of the present application more apparent, understandable and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments. Specific embodiments

[0026] The content of the present application can be further understood in combination with the following detailed description of the preferred embodiment of the present application and the included embodiments. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as that generally understood by those skilled in the art to which the present application belongs. If the definition of a specific term disclosed in the prior art is inconsistent with any definition provided in the present application, the term definition provided in the present application shall prevail.

[0027] In a typical embodiment of the present application, an umbrella-shaped antenna surface structure is provided, comprising a flexible antenna arc surface layer 1, a reinforcing layer 2 and a reinforcing rib 3. The flexible antenna arc surface layer 1 is an umbrella-shaped structure with a through hole in the middle. The reinforcing layer 2 is provided with a plurality of reinforcing layers 2, which are spaced apart and laid on the flexible antenna arc surface layer. The reinforcing rib 3 is provided with a plurality of reinforcing ribs 3, which are uniformly spaced apart along the circumferential direction of the flexible antenna arc surface layer 1, and are used to fixedly connect the flexible antenna arc surface layer 1 and the reinforcing layer 2.

[0028] In a preferred embodiment, the flexible antenna arc surface layer 1 is a toughened epoxy resin 3k plain weave carbon fiber single layer structure with a thickness of 0.15-0.20mm and a resin content of 45±2%. The present application uses a toughened epoxy resin 3k plain weave carbon fiber single layer, which gives the antenna surface as a whole flexibility, and can be smoothly unfolded and folded.

[0029] As further improvement of the above-mentioned embodiment of the utility model, the reinforcing layer 2 is circular ring structure, and multiple reinforcing layers 2 are laid on the flexible antenna circular arc surface layer 1 from the center of the flexible antenna circular arc surface layer 1 to the outside in intervals.

[0030] In a preferred embodiment, the reinforcing layer 2 is a unidirectional toughened epoxy resin carbon fiber layer, and the placement direction is perpendicular to the reinforcing rib 3; the thickness of the reinforcing layer 2 is 0.08-0.12 mm, the width is 10-20 mm, and the interval distance between adjacent reinforcing layers 2 is 20-30 mm.

[0031] In a preferred embodiment, the reinforcing rib 3 is a T-shaped carbon fiber composite profile, and the width is 20-30 mm, the height is 20 mm, and the plate thickness is 0.3-0.5 mm.

[0032] As further improvement of the above-mentioned embodiment of the utility model, the reinforcing rib 3 is arranged in the form of being laid in intervals along the radius direction of the flexible antenna circular arc surface layer 1 at intervals of 15-20 degrees.

[0033] The reinforcing layer of the utility model is a unidirectional toughened epoxy resin carbon fiber prepreg, and the placement direction is perpendicular to the reinforcing rib; the reinforcing layer is arranged in intervals, forming a reinforcing structure similar to a spider web structure; the arrangement of the reinforcing structure is conducive to providing longitudinal and transverse strong support functions when the antenna surface is unfolded, maintaining the stability of the whole when the flexible antenna surface is unfolded, and improving the surface precision of the antenna surface.

[0034] The utility model will be further described in combination with examples as follows:

[0035] Example 1

[0036] Reference Figure 1 The embodiment relates to an umbrella-shaped antenna surface structure, which comprises a flexible antenna circular arc surface layer, a reinforcing layer and a reinforcing rib; the flexible antenna circular arc surface layer is an umbrella-shaped structure with a through hole in the middle; the reinforcing layer is provided in plurality, and the multiple reinforcing layers are laid on the flexible antenna circular arc surface layer in intervals; the reinforcing rib is provided in plurality, and the multiple reinforcing ribs are laid in intervals along the circumferential direction of the flexible antenna circular arc surface layer, and are used for fixedly connecting the flexible antenna circular arc surface layer and the reinforcing layer.

[0037] During installation, the flexible antenna arc surface layer previously laid on the surface of the mold is a single layer of toughened epoxy plain carbon fiber (thickness 0.15mm, resin content 46%), then unidirectional toughened epoxy carbon fiber is laid as a reinforcing layer from the center of the flexible antenna arc surface layer, the multiple reinforcing layers are placed at intervals and in a direction perpendicular to the radial direction, the reinforcing layer has a thickness of 0.08mm, a width of 10mm, and an interval distance of 20mm, then a T-shaped carbon fiber composite profile reinforcing rib is placed, the reinforcing rib has a width of 20mm, a height of 20mm, and a plate thickness of 0.4mm, and is laid in a form of being evenly laid at intervals of 15° along the radial direction, and is integrally formed by using a vacuum bag autoclave molding process.

[0038] Embodiment 2

[0039] With reference to Figure 1 The umbrella-shaped antenna surface structure of the embodiment comprises a flexible antenna arc surface layer, reinforcing layers, and reinforcing ribs, the flexible antenna arc surface layer is an umbrella-shaped structure with a through hole in the middle, the reinforcing layers are provided in plurality, and the multiple reinforcing layers are laid at intervals on the flexible antenna arc surface layer; the reinforcing ribs are provided in plurality, and the multiple reinforcing ribs are evenly laid at intervals along the circumferential direction of the flexible antenna arc surface layer, and are used for fixedly connecting the flexible antenna arc surface layer and the reinforcing layers.

[0040] During installation, the flexible antenna arc surface layer is specifically a single layer of toughened epoxy plain carbon fiber (thickness 0.20mm, resin content 45%) which is previously laid on the surface of the mold, then unidirectional toughened epoxy carbon fiber is laid as a reinforcing layer from the center of the flexible antenna arc surface layer, the multiple reinforcing layers are placed at intervals and in a direction perpendicular to the radial direction, the reinforcing layer has a thickness of 0.12mm, a width of 20mm, and an interval distance of 30mm, then a T-shaped carbon fiber composite profile reinforcing rib is placed, the reinforcing rib has a width of 30mm, a height of 20mm, and a plate thickness of 0.4mm, and is laid in a form of being evenly laid at intervals of 20° along the radial direction, and is integrally formed by using a vacuum bag autoclave molding process.

[0041] In summary, the umbrella-shaped antenna surface structure is reasonable, scientific, and simple to manufacture, the antenna surface is light in quality, and the surface precision is high, RMS≤0.30mm.

[0042] The specific embodiments of the umbrella-shaped antenna surface structure described above are further detailed descriptions of the purpose, technical scheme and beneficial effects of the utility model, and it should be understood that the umbrella-shaped antenna surface structure described above is only a representative of the specific embodiments of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. An umbrella-shaped antenna surface structure, characterized in that: The invention comprises a flexible antenna arc surface layer (1), a reinforcement layer (2), and reinforcement ribs (3), wherein the flexible antenna arc surface layer (1) is an umbrella-shaped structure with a through hole in the center, a plurality of reinforcement layers (2) are provided, and the plurality of reinforcement layers (2) are laid on the flexible antenna arc surface layer at intervals; a plurality of reinforcement ribs (3) are provided, and the plurality of reinforcement ribs (3) are laid evenly at intervals along the circumferential direction of the flexible antenna arc surface layer (1), and are used to fixedly connect the flexible antenna arc surface layer (1) and the reinforcement layer (2).

2. The umbrella-shaped antenna surface structure according to claim 1, wherein: The flexible antenna arc surface layer (1) is a toughened epoxy resin carbon fiber single-layer structure with a thickness of 0.15-0.20 mm.

3. The umbrella-shaped antenna surface structure according to claim 1, wherein: The reinforcement layer (2) is a circular ring structure, and a plurality of reinforcement layers (2) are laid on the flexible antenna arc surface layer (1) at intervals from the inside to the outside starting from the center of the flexible antenna arc surface layer (1).

4. The umbrella-shaped antenna surface structure according to claim 1, wherein: The reinforcement layer (2) is a unidirectional toughened epoxy resin carbon fiber layer, which is placed perpendicular to the reinforcement rib (3). The reinforcement layer (2) has a thickness of 0.08-0.12 mm and a width of 10-20 mm. The spacing between adjacent reinforcement layers (2) is 20-30 mm.

5. The umbrella-shaped antenna surface structure according to claim 1, wherein: The reinforcing rib (3) is a T-shaped carbon fiber composite profile with a width of 20-30 mm, a height of 20-30 mm, and a plate thickness of 0.3-0.5 mm.

6. The umbrella-shaped antenna surface structure according to claim 1, wherein: The plurality of reinforcing ribs (3) are arranged in a manner such that they are evenly laid at intervals of 15° to 20° along the radial direction of the flexible antenna arc surface layer (1).

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