Antenna cover and manufacturing method thereof
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-03-13
- Publication Date
- 2026-03-11
AI Technical Summary
Conventional antenna covers made of thermoplastic plastics like PC have high dielectric constants, impeding electromagnetic wave transmission and affecting antenna performance, while requiring sealing edges that increase size and cost.
A sandwich structure comprising a low-dielectric-constant core layer sandwiched between skin layers, eliminating the need for a sealing edge and allowing the entire cover to serve as a radiation area, with a manufacturing method involving hot pressing and integration of a composite panel.
This design improves antenna performance, reduces size, and lowers installation costs by minimizing dielectric interference and eliminating the need for a sealing edge.
Smart Images
Figure 2026508679000001_ABST
Abstract
Description
[Technical Field]
[0001] [CROSS-REFERENCE TO RELATED APPLICATIONS] This disclosure is based on and claims priority to Chinese Patent Application No. 2023103793926, filed on March 31, 2023, entitled "Antenna Cover and Manufacturing Method Thereof," the entire disclosure of which is incorporated herein by reference.
[0002] [Technical field] The present disclosure relates to the technical field of communications, and in particular to an antenna cover and a manufacturing method thereof. [Background technology]
[0003] The antenna cover is a structure that protects the antenna system from the influence of the external environment. It is required to have good electromagnetic wave transparency in electrical performance and the ability to withstand the harsh external environment in mechanical performance.
[0004] Conventional antenna covers for communication devices are injection-molded using thermoplastic plastics such as PC. Such materials have the characteristic of a high dielectric constant, which significantly impedes the electromagnetic waves emitted by the antenna and reduces transmittance, thereby affecting antenna performance. Summary of the Invention [Problem to be solved by the invention]
[0005] The main objective of the present disclosure is to provide an antenna cover and a manufacturing method thereof that effectively reduces the dielectric constant of the antenna cover, protects the core layer using a cover body, a first skin layer, and a second skin layer, does not require a sealing edge, and allows the entire antenna cover to be the radiation area, thereby not only improving antenna performance but also reducing the installation cost and size of the antenna cover because no sealing edge is required. [Means for solving the problem]
[0006] According to a first aspect of the present disclosure, there is provided a cover body and a composite panel, wherein the cover body has a hollow region, the hollow region has a first opening and a second opening in a first direction, and the first direction is a thickness direction of the cover body, The composite panel comprises: a core layer fitted in the hollow region and having a first side and a second side opposing each other in the first direction; a first skin layer sealingly attached to the first side of the core layer and covering the first opening; a second skin layer sealingly attached to the second side of the core layer and covering the second opening; An antenna cover is provided in which the core layer is made of a low dielectric constant material, and the periphery of the core layer extends until it abuts against the inner wall of the hollow region.
[0007] According to a second aspect of the present disclosure, forming a hollow area in the cover body; cutting the prepreg and the lightweight low dielectric composite material into a predetermined shape, wherein the prepreg is cut to form a first skin layer and a second skin layer, and the lightweight low dielectric composite material is cut to form a core layer; a step of attaching the first skin layer, the cover body, the core layer, and the second skin layer to a mold in this order, and fitting the core layer into a hollow region of the cover body, wherein the first skin layer and the second skin layer are attached to opposite sides of the core layer in a thickness direction, respectively, and the first skin layer and the second skin layer are in close contact with the mold; placing the mold in a mold press to hot press the first skin layer, the cover body, the core layer, and the second skin layer; After the hot pressing is completed, the mold is cooled, and then the mold is opened and the manufactured antenna cover is removed.
[0008] In order to more clearly describe the technical means in the embodiments of the present disclosure, the drawings necessary for describing the embodiments will be briefly described below. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and those skilled in the art can obtain other drawings based on these drawings without any creative work. [Brief explanation of the drawings]
[0009] [Figure 1] 1 is a structural schematic diagram of an antenna cover according to an embodiment of the present disclosure from a first viewing angle. [Figure 2] FIG. 10 is a structural schematic diagram of an antenna cover according to an embodiment of the present disclosure from a second viewing angle. [Figure 3] FIG. 2 is an exploded view of an antenna cover according to an embodiment of the present disclosure. [Figure 4] FIG. 2 is a cross-sectional view in the width direction of a cover body according to an embodiment of the present disclosure. [Figure 5] 1 is a flowchart of a method for manufacturing an antenna cover according to an embodiment of the present disclosure. [Figure 6] 1 shows antenna patterns of Example 1, Comparative Example 1, and Comparative Example 2. [Explanation of symbols]
[0010] 100 Antenna cover, 10 Cover body, 10a Plate body, 10b Surrounding edge, 11 Hollow area, 12 First surface, 121 First position limiting groove, 13 Second surface, 131 Second position limiting groove, 20 Composite panel, 21 Core layer, 211 First side, 212 Second side, 22 First skin layer, 23 Second skin layer DETAILED DESCRIPTION OF THE INVENTION
[0011] Hereinafter, the technical solutions in the embodiments of the present disclosure will be clearly and completely described with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only some embodiments of the present disclosure, and are not all of them, and all other embodiments obtained by those skilled in the art based on the embodiments of the present disclosure without any creative work are all within the scope of protection of the present disclosure.
[0012] It should be noted that the terms used in the specification of the present disclosure are for the purpose of describing particular embodiments only and are not intended to limit the present disclosure. As used in the specification of the present disclosure and the appended claims, the singular forms "a," "one," and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise.
[0013] It should be noted that, as used in the specification of this disclosure and the appended claims, the term "and / or" refers to and includes any and all possible combinations of one or more of the associated listed items.
[0014] It will be understood that the specific embodiments described herein are illustrative of the present disclosure only and are not intended to be limiting of the present disclosure.
[0015] An antenna cover is a structure that protects an antenna system from the influence of the external environment, and is required to have good electromagnetic wave transparency in electrical performance and the ability to withstand the harsh external environment in mechanical performance.
[0016] Conventional antenna covers for communication devices are injection molded using thermoplastic plastics such as PC (Polycarbonate). Such materials have the characteristic of having a high dielectric constant, which significantly impedes the electromagnetic waves emitted by the antenna and reduces transmittance, thereby affecting antenna performance.
[0017] Therefore, it is necessary to select a low-dielectric-constant material to reduce the dielectric constant of the antenna cover. A sandwich structure can be applied to the antenna cover because it effectively reduces the dielectric constant of the antenna cover by using a lightweight, low-dielectric-constant core layer. The sandwich structure generally consists of an upper skin, a lower skin, a core layer sandwiched between the upper and lower skins, and a sealing edge. When the complete sandwich structure is assembled to a conventional antenna cover using a conventional method, such as by using adhesives or screws to fit the sealing strip, both the transition area and the sealing edge location occupy space on the antenna cover, which not only affects the antenna performance but also increases the size of the antenna cover.
[0018] As a result, the embodiments of the present disclosure provide an antenna cover and a manufacturing method thereof that uses a cover body, a first skin layer, and a second skin layer to protect the core layer, eliminating the need for a sealing edge and allowing the entire antenna cover to be the radiation area, thereby not only improving antenna performance but also reducing installation costs and the size of the antenna cover because no sealing edge is required.
[0019] Hereinafter, several embodiments of the present disclosure will be described in detail with reference to the drawings. The following embodiments and features in the embodiments can be combined with each other unless they are inconsistent.
[0020] As shown in FIGS. 1 to 3 , an embodiment of the present disclosure provides an antenna cover 100 including a cover body 10 and a composite panel 20, where the cover body 10 is provided with a hollow area 11. The hollow area 11 has a first opening and a second opening in a first direction, which is the thickness direction of the cover body 10. The composite panel 20 includes a core layer 21, a first skin layer 22, and a second skin layer 23. The core layer 21 is fitted into the hollow area 11. The core layer 21 has a first side 211 and a second side 212 opposite to each other in the first direction. The first skin layer 22 is hermetically attached to the first side 211 of the core layer 21 and covers the first opening of the hollow area 11. The second skin layer 23 is hermetically attached to the second side 212 of the core layer 21 and covers the second opening of the hollow area 11. The core layer 21 is made of a low-dielectric-constant material, and the periphery of the core layer 21 extends until it abuts against the inner wall of the hollow region 11 .
[0021] The antenna cover 100 according to the embodiment of the present disclosure uses a low dielectric constant material as the core layer 21, thereby effectively reducing the dielectric constant of the antenna cover 100, and the core layer 21 is directly connected to the cover body 10 without the need for a sealing edge. The core layer 21 is protected by the cover body 10, the first skin layer 22, and the second skin layer 23, and without the need for a sealing edge, the entire antenna cover 100 can be used as a radiation area. This not only improves antenna performance, but also reduces installation costs and the size of the antenna cover 100 because no sealing edge is required.
[0022] In some embodiments, the antenna cover needs to be manufactured to fit the shape of the antenna, which results in a complex structure. If the entire antenna cover uses a sandwich structure, the molding process is complicated and the cost is high. Therefore, a portion of the cover body 10 is injection molded from a conventional thermoplastic plastic such as PC, which results in a simple process and low cost. By providing a hollow area 11 in the flat part of the cover body 10 and fixing the composite panel 20 thereto, the dielectric constant of the antenna cover 100 can be effectively reduced, and the process can be made easier and the cost can be reduced.
[0023] In some embodiments, the thickness of core layer 21 in the first direction is equal to or less than the thickness of the inner wall of hollow region 11. Illustratively, the thickness of core layer 21 may be the same as the thickness of the inner wall of hollow region 11, so that the surfaces of first side 211 and second side 212 of core layer 21 are flush with the openings on both sides of hollow region 11, thereby making it easier for first skin layer 22 and second skin layer 23 to adhere to core layer 21 and providing better protection. Of course, in other embodiments, the thickness of core layer 21 may be smaller than the thickness of the inner wall of hollow region 11.
[0024] 2 and 3, the cover body 10 has a first surface 12 and a second surface 13 that face each other in a first direction, and the surface of the first skin layer 22 is flush with the first surface 12, and the surface of the second skin layer 23 is flush with the second surface 13. In this embodiment, the above installation method allows the surface of the antenna cover 100 to be flat, making the overall structure more beautiful and harmonious.
[0025] Of course, the first skin layer 22 and the second skin layer 23 are not limited to the above arrangement. For example, in another embodiment, the cover body 10 has a first surface 12 and a second surface 13 facing each other in a first direction, the first skin layer 22 protruding outward from the first surface 12 or recessed into the first surface 12, and the second skin layer 23 protruding outward from the second surface 13 or recessed into the second surface 13. In this embodiment, the first skin layer 22 and the second skin layer 23 may protrude outward from or be recessed inward from the surface of the cover body 10, as long as they can protect the core layer 21.
[0026] 3 and 4, a first position limiting groove 121 that fits the first skin layer 22 is recessed into the edge of the hollow region 11 of the first surface 12, and the first skin layer 22 is fitted into the first position limiting groove 121. In this embodiment, when the thicknesses of the core layer 21 and the hollow region 11 of the cover body 10 are the same, the provision of the first position limiting groove 121 can position the first skin layer 22, which is advantageous for the first skin layer 22 to be attached to the first side 211 of the core layer 21 and for the first skin layer 22 to be connected flush with the surface of the cover body 10 without protruding outward, resulting in a more aesthetically harmonious overall structure.
[0027] 5, a second position limiting groove 131 that fits the second skin layer 23 is recessed into the edge of the hollow region 11 of the second surface 13, and the second skin layer 23 is fitted into the second position limiting groove 131. In this embodiment, when the thicknesses of the core layer 21 and the hollow region 11 of the cover body 10 are the same, the provision of the second position limiting groove 131 can position the second skin layer 23, which is advantageous for attaching the second skin layer 23 to the second side 212 of the core layer 21 and for connecting the second skin layer 23 flush with the surface of the cover body 10 without protruding outward, resulting in a more aesthetically harmonious overall structure.
[0028] Of course, the antenna cover 100 of the present disclosure does not need to have the first position limiting groove 121 and the second position limiting groove 131, and the first skin layer 22 and the second skin layer 23 may be provided so as to protrude outward, or the cross-sectional size of the first skin layer 22 and the second skin layer 23 may be made to match that of the core layer 21. In this case, the edges of the first skin layer 22 and the second skin layer 23 abut the inner wall of the hollow region 11, and the total thickness of the first skin layer 22, the second skin layer 23 and the core layer 21 is equal to the thickness of the hollow region 11. In this way, the first skin layer 22 and the second skin layer 23 may be flush with the surface of the cover body 10, as long as they can protect the core layer 21 at the same time.
[0029] In some embodiments, the hollow structure may be provided on one side in the extension direction of the cover body 10 to accommodate different usage scenarios. That is, the left side in the usage state shown in FIG. 3 , but of course, in other embodiments, the hollow structure may be provided at any position, such as the right side, upper side, lower side, or middle position of the cover body 10.
[0030] In some embodiments, as shown in Figures 1 to 3, to accommodate different usage scenarios, the cover body 10 extends along a second direction and the composite panel 20 extends along a third direction, where the second and third directions are located in the same horizontal direction and perpendicular to each other, and both are installed perpendicular to the first direction. In this embodiment, this installation allows the composite panel 20 to be close to the edge of the cover body 10. Of course, in some other embodiments, the extension direction of the composite panel 20 may be non-perpendicular, such as being aligned with the extension direction of the cover body 10.
[0031] In some embodiments, the first skin layer, the second skin layer, the core layer, and the cover body are integrally formed, so that the first skin layer, the second skin layer, and the cover body are integrally formed on the outer surface of the core layer. In this embodiment, with the above arrangement, the antenna cover of the present disclosure does not require an extra sealing edge, and the cover body, the first skin layer, and the second skin layer of the antenna cover are integrally formed to protect the core layer.
[0032] For example, the composite panel 20 and the cover body 10 may be fixed together by adhesive or hot pressing. In this embodiment, by fixing the composite panel 20 and the cover body 10 together by hot pressing, it is possible to ensure adhesion between the first skin layer 22, the second skin layer 23, the core layer 21, and the cover body 10, improve connection stability, and reduce porosity.
[0033] In some embodiments, the horizontal cross-sectional sizes of the hollow region 11 and the core layer 21 are the same. In this embodiment, this arrangement is advantageous in that the cover body 10 provides a protective effect to the core layer 21 and improves connection stability.
[0034] In some embodiments, the horizontal cross-sectional sizes of the first skin layer 22 and the second skin layer 23 are the same. In this embodiment, this arrangement not only balances the opposing sides of the core layer 21 and matches the protective effect, but also eliminates the need to distinguish between the first skin layer 22 and the second skin layer 23 during processing, making the first skin layer 22 and the second skin layer 23 easier to process.
[0035] 1 to 3, the cover body 10 includes a plate body 10a and a surrounding edge 10b that surrounds the periphery of the plate body 10a, and the hollow structure is provided in the plate body 10a. In this embodiment, the plate body 10a has planar structures on both opposing sides, and the surrounding edge 10b can extend along a direction perpendicular to the plate body 10a, and the hollow region 11 is provided in the flat plate body 10a to facilitate bonding and fixing to the composite panel 20.
[0036] In some embodiments, the core layer 21 is made of aramid honeycomb and microcellular plastic. In this embodiment, the aramid honeycomb restricts the flow of the microcellular plastic during the molding process, preventing problems such as unevenness and irregularities in the structure caused by the microcellular plastic flowing everywhere. Meanwhile, the honeycomb-like connection structure inherent in the aramid honeycomb after molding ensures the tensile and impact resistance of the finished product. Furthermore, the aramid honeycomb expands in volume during the molding process, effectively filling gaps between components and allowing for closer connections. At the same time, the large volume of the aramid honeycomb effectively reduces the mass per unit volume, thereby reducing the weight of the finished product.
[0037] For example, the aramid honeycomb may have a structure of at least two layers, and the two layers of aramid honeycomb are arranged with gaps staggered between them. The staggered gaps are advantageous in further restricting the flow of the micro-cellular plastic, and at the same time, the staggered gaps are advantageous in forming an interlaced structure in the honeycomb structure of the finished product. The hardened micro-cellular plastic in the honeycomb structure can be threaded up and down like a woven rope, which is advantageous in further improving the tensile resistance and impact resistance of the core layer and improving the performance of the antenna cover 100.
[0038] In some embodiments, the microcellular plastic includes at least one of polymethacrylimide foam and polypropylene foam, which have low dielectric constants and dielectric losses, thereby increasing the transmittance of the formed core layer and improving the performance of the antenna cover 100.
[0039] In some embodiments, the density of the microcellular plastic is 70 kg / m 3 ~110kg / m 3 In this embodiment, the weight of the core layer is reduced by the above-mentioned selection of micro-cellular plastic, and thus the weight of the antenna cover 100 is reduced.
[0040] In some embodiments, the dielectric constant of the micro-cellular plastic is 1.2 or less. In this embodiment, the above selection of the micro-cellular plastic increases the transmittance of the formed core layer, thereby improving the performance of the antenna cover 100.
[0041] In some embodiments, the dielectric loss of the microcellular plastic is less than 0.001. In this embodiment, the above selection of the microcellular plastic increases the transmittance of the formed core layer, thereby improving the performance of the antenna cover 100.
[0042] As shown in FIG. 4, an embodiment of the present disclosure includes: Step S1: forming a hollow region 11 in the cover body 10; a step S2 of cutting the prepreg and the lightweight low dielectric composite material into predetermined shapes, in which the prepreg is cut to form a first skin layer 22 and a second skin layer 23, and the lightweight low dielectric composite material is cut to form a core layer 21; Step S3: attaching the first skin layer 22, the cover body 10, the core layer 21, and the second skin layer 23 to a mold in this order, and fitting the core layer 21 into the hollow region 11 of the cover body 10, wherein the first skin layer 22 and the second skin layer 23 are attached to opposite sides of the core layer 21 in the thickness direction, respectively, and the first skin layer 22 and the second skin layer 23 are in close contact with the mold; Step S4: hot-pressing the mold into a mold press so as to hot-press the first skin layer 22, the cover body 10, the core layer 21, and the second skin layer 23; After the hot pressing is completed, the method for manufacturing the antenna cover 100 further includes step S5 of cooling the mold, opening the mold, and removing the manufactured antenna cover 100.
[0043] In the manufacturing method of the antenna cover 100 according to the embodiment of the present disclosure, the core layer 21 is formed using a lightweight, low-dielectric composite material, thereby effectively reducing the dielectric constant of the antenna cover 100; the cover body 10, the first skin layer 22, and the second skin layer 23 of the antenna cover 100 are hot-pressed to protect the core layer 21, eliminating the need to separately manufacture a sealing edge to protect the core layer 21; the entire antenna cover 100 can be used as a radiation area, which not only improves antenna performance but also simplifies the process, reduces costs, and reduces the size of the antenna cover 100.
[0044] For example, in step S3, the mold surface is first cleaned by wiping it with a cleaning agent, then drying and cooling it to room temperature, which may be repeated several times to ensure that the mold surface is clean, oil-free, free of droplets and dust.
[0045] For example, the mold includes an upper mold plate and a lower mold plate, and the first skin layer 22, the cover body 10, the core layer 21, and the second skin layer 23 are stacked on the lower mold plate in order. After the stacking is completed, the upper mold plate is placed on top, and the mold is placed in a mold press machine. After preheating to the activation temperature of the resin, the pressure is increased, the temperature is raised, and the temperature and pressure are maintained for a certain period of time.
[0046] Illustratively, the increased pressure may be 1.5 MPa to 10 MPa, and the time for maintaining the temperature and pressure is 0.5 hours or more.
[0047] For example, after the hot pressing is completed, the mold is cooled to the mold opening temperature, and the cooling rate may be 5°C / min to 20°C / min.
[0048] For example, in step S4, after placing the upper mold plate, the mold is heated and pressurized while vibrating, thereby filling the mold with material more uniformly and reducing variations in the finished product at different locations. Furthermore, before placing the upper mold plate, the mold is filled with prepreg, and the flow of the prepreg can be utilized to further flatten the surface of the first skin layer 22. Vibrating the mold can further accelerate the flow of the prepreg. When the pre-dip liquid is filled separately, the thickness of the raw material stack is 75% to 80% of the mold depth, and the volume of the filled pre-dip liquid is 1% to 2% of the mold volume. The remaining space is reserved as a reserve space required for the expansion of the raw material. To further ensure the flatness of the outer surface of the first skin layer 22, the mold is held upside down for the first 10 minutes of the heat and pressure holding step, with the first skin layer 22 facing downward, and then flipped back to an upright position with the second skin layer 23 facing upward.
[0049] Illustratively, the composite panel 20 may be machined and / or painted, with the paint thickness being approximately 50 μm to 100 μm.
[0050] In some embodiments, the prepreg is a fabric that is impregnated with a resin system, which in this embodiment can improve the toughness of the material.
[0051] In some embodiments, the weave of the fabric is a plain weave. In this embodiment, the weave of the fabric is a plain weave, which has the highest number of weaves and improves the robustness and abrasion resistance of the fabric.
[0052] In some embodiments, the fiber cloth is one or a combination of glass fiber cloth, quartz fiber cloth, and aramid fiber cloth. In this embodiment, the fiber cloth may be glass fiber cloth with a low dielectric constant, which has high insulation, high heat resistance, high corrosion resistance, and high mechanical strength. Alternatively, quartz fiber cloth may be used, which has heat resistance, corrosion resistance, and flexibility, high strength retention at high temperatures, and excellent size stability, thermal shock resistance, chemical stability, translucency, and electrical insulation. Alternatively, aramid fiber cloth may be used, which is lightweight and has high breaking strength.
[0053] Illustratively, the glass fiber cloth may be, specifically, E glass fiber cloth, HL glass fiber cloth, or D glass fiber cloth.
[0054] In some embodiments, the resin system for dipping the fabric includes one of an epoxy resin system, a vinyl resin system, and a polyurethane resin system. In this embodiment, the epoxy resin has good adhesion, heat resistance, chemical resistance, and excellent mechanical properties. The vinyl resin can fuse better with the glass fiber and has good antistatic properties. The polyurethane resin has good thermal adhesion when heated to form a film, achieving good adhesion with the fabric.
[0055] In some embodiments, the volume fraction of the base resin in the resin system for dipping the fiber fabric is 30% to 42.5%. In this embodiment, by selecting a resin system with the above volume fraction for dipping the fiber fabric, the performance of the molded antenna cover 100 can be improved.
[0056] In the manufacturing method of an antenna cover according to an embodiment of the present disclosure, a core layer is formed using a lightweight, low-dielectric composite material, thereby effectively reducing the dielectric constant of the antenna cover; and the core layer is protected by hot-pressing the cover body, first skin layer, and second skin layer of the antenna cover together, eliminating the need to separately manufacture a sealing edge to protect the core layer. The entire antenna cover can be used as a radiation area, which not only improves antenna performance but also simplifies the process, reduces costs, and reduces the size of the antenna cover.
[0057] Example 1 An antenna having an antenna cover according to an embodiment of the present disclosure is referred to as Example 1.
[0058] Comparative Example 1 Since electromagnetic waves emitted from the antenna may result in power loss due to reflection on the surface of the antenna cover and absorption within the dielectric layer of the antenna cover, the most ideal state is one without an antenna cover, i.e., one with minimal interference.For this reason, an antenna without an antenna cover is designated as Comparative Example 1.
[0059] Comparative Example 2 An antenna having a conventional antenna cover (an antenna cover entirely injection-molded from PC plastic) is used as Comparative Example 2.
[0060] The antenna patterns of Example 1, Comparative Example 1, and Comparative Example 2 are shown in Figure 6, and specific parameters corresponding to Figure 6 are shown in Table 1. In Figure 6, the horizontal axis represents angle and the vertical axis represents antenna gain. As can be seen from Figure 6 and Table 1, in the range of -90° to 90°, the beam shape of Example 1 is closer to the beam shape of Comparative Example 1 (no antenna cover used) than Comparative Example 2. In particular, in the range of 50° to 90°, the beam deformation of Comparative Example 2 becomes severe, whereas the beam shape of Example 1 is closer to that of Comparative Example 1. This indicates that when the antenna cover according to the examples of the present disclosure acts on the antenna, power loss is low, interference is small, and antenna performance is improved.
[0061] [Table 1]
[0062] The above-described embodiments of the present disclosure are merely illustrative and do not indicate the merits or demerits of the embodiments. The above are merely specific embodiments of the present disclosure, and the scope of protection of the present disclosure is not limited thereto. Those skilled in the art may easily devise various equivalent modifications or substitutions within the technical scope disclosed in the embodiments of the present disclosure, and all such modifications or substitutions should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be determined based on the scope of protection of the claims.
Claims
1. The cover includes a cover body and a composite panel, the cover body having a hollow area, the hollow area having a first opening and a second opening in a first direction, the first direction being a thickness direction of the cover body, The composite panel comprises: a core layer fitted in the hollow region and having a first side and a second side opposing each other in the first direction; a first skin layer hermetically attached to the first side of the core layer and covering the first opening; a second skin layer sealingly attached to the second side of the core layer and covering the second opening; The core layer is made of a low dielectric constant material, and the periphery of the core layer extends until it abuts against the inner wall of the hollow region.
2. The antenna cover according to claim 1 , wherein the thickness of the core layer in the first direction is equal to or less than the thickness of an inner wall of the hollow region.
3. The cover body has a first surface and a second surface opposing each other in the first direction, the surface of the first skin layer and the first surface are connected flush with each other, and the surface of the second skin layer and the second surface are connected flush with each other, or 2. The antenna cover of claim 1, wherein the cover body has a first surface and a second surface opposing each other in the first direction, the first skin layer protruding outward from the first surface or embedded in the first surface, and the second skin layer protruding outward from the second surface or embedded in the second surface.
4. a first position limiting groove that is recessed in an edge portion of the hollow region of the first surface and is aligned with the first skin layer, and the first skin layer is fitted into the first position limiting groove; and / or 4. The antenna cover according to claim 3, wherein a second position limiting groove is recessed at an edge of the hollow region of the second surface to fit the second skin layer, and the second skin layer is fitted into the second position limiting groove.
5. 2. The antenna cover according to claim 1, wherein the first skin layer, the second skin layer, the core layer, and the cover body are integrally molded, so that the first skin layer, the second skin layer, and the cover body are integrally molded to cover the outer surface of the core layer.
6. 6. The antenna cover according to claim 1, wherein the core layer is made of an aramid honeycomb and a microcellular plastic.
7. The microcellular plastic includes at least one of polymethacrylimide foam and polypropylene foam, and / or The density of the micro-foamed plastic is 70 kg / m ３ ~110 kg / m ３ and / or The dielectric constant of the microcellular plastic is 1.2 or less, and / or 7. The antenna cover according to claim 6, wherein the microcellular plastic has a dielectric loss of 0.001 or less.
8. forming a hollow area in the cover body; cutting the prepreg and the lightweight low dielectric composite material into a predetermined shape, wherein the prepreg is cut to form a first skin layer and a second skin layer, and the lightweight low dielectric composite material is cut to form a core layer; a step of attaching the first skin layer, the cover body, the core layer, and the second skin layer to a mold in this order, and fitting the core layer into a hollow region of the cover body, wherein the first skin layer and the second skin layer are attached to opposite sides of the core layer in a thickness direction, respectively, and the first skin layer and the second skin layer are in close contact with the mold; placing the mold in a mold press to hot press the first skin layer, the cover body, the core layer, and the second skin layer; After the hot pressing is completed, the mold is cooled, and then the mold is opened and the manufactured antenna cover is removed.
9. The method of claim 8 wherein the prepreg is a fabric that is impregnated with a resin system.
10. The textile fabric is plain woven, and / or The fiber cloth is one or a combination of glass fiber cloth, quartz fiber cloth, and aramid fiber cloth; and / or The resin system for textile dipping comprises one of an epoxy resin system, a vinyl resin system, a polyurethane resin system, and / or The method of claim 9, wherein the volume fraction of base resin in the resin system for fabric dipping is 30% to 42.5%.