Lightweight flat panel antenna

Abstract

The utility model discloses a lightweight flat plate antenna, including flat plate antenna main part, the flat plate antenna main part is composed by lower plate, middle plate and upper plate, the opposite surface of lower plate and middle plate and the opposite surface of middle plate and upper plate are provided with low temperature tin cream respectively, and is provided with the welding rib between lower plate and middle plate and between middle plate and upper plate, and the welding rib is welded with low temperature tin cream, and low temperature tin cream is printed on the surface of lower plate, middle plate and upper plate, and the spacing of low temperature tin cream and the channel edge of welding rib is not less than the one-way flow distance when low temperature tin cream melts. The utility model discloses a welding rib and low temperature tin cream with lower plate, middle plate and upper plate in order weld together and form flat plate antenna main part, and the traditional screw connection is replaced by the mode of connection of welding, guarantees the connection airtightness and the connection strength reliability, and avoids the various limitations of traditional screw connection.

Description

Technical Field

[0001] This utility model relates to the field of flat panel antenna technology, specifically a lightweight flat panel antenna. Background Technology

[0002] With the increasing penetration of satellite communication into various fields, the demand for flattened and lightweight designs is becoming more and more widespread.

[0003] Traditional planar antennas typically use screw connections. However, screw connections are no longer sufficient to meet the requirements for the airtightness of waveguide signals and the reliability of connection strength. First, the spacing between antenna channels is getting smaller and smaller, and the thin walls between channels cannot accommodate screws, resulting in unreliable sealing of the signal slot sidewalls and easy signal leakage. Second, the antenna height is getting lower and the antenna plate is getting thinner, making it impossible to provide sufficient thread connection depth. Finally, the excessively thin wall thickness can easily cause local plastic deformation of the plastic after fixing. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a lightweight flat panel antenna.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A lightweight flat panel antenna includes a flat panel antenna body, which is composed of a lower plate, a middle plate, and an upper plate. Low-temperature solder paste is respectively provided on the opposite surfaces of the lower plate and the middle plate, and on the opposite surfaces of the middle plate and the upper plate. Welding ribs are respectively provided between the lower plate and the middle plate, and between the middle plate and the upper plate, and the welding ribs are soldered to the low-temperature solder paste.

[0007] Preferably, the low-temperature solder paste is printed on the surfaces of the lower plate, the middle plate, and the upper plate, and the distance between the low-temperature solder paste and the channel edge of the solder rib is not less than the unidirectional flow distance of the low-temperature solder paste when it melts.

[0008] Preferably, the welding rib has multiple heat-conducting holes, and the multiple heat-conducting holes correspond to the non-functional areas of the flat panel antenna body.

[0009] Preferably, the upper surface of the upper plate is uneven, and a plurality of nuts are inlaid in the recessed area of ​​the upper plate around the perimeter of the upper plate. The nuts are used to tighten the screws that pass through the lower plate, the middle plate and the upper plate from top to bottom.

[0010] Preferably, the plurality of nuts are arranged at intervals along the edge of the upper plate, and the top surface of each nut is not higher than the top surface of the upper plate.

[0011] Preferably, the lower surface of the lower plate and the upper surface of the upper plate are respectively provided with a metal layer.

[0012] Preferably, the metal layer includes a titanium layer disposed on the surfaces of the lower plate and the upper plate, and a first copper layer disposed on the surface of the titanium layer.

[0013] Preferably, the thickness of the metal layer is less than 1 μm.

[0014] Preferably, the surface of the metal layer is further provided with a thickening layer.

[0015] Preferably, the thickness of the thickening layer is less than 10 μm.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. This utility model uses welding ribs and low-temperature solder paste to weld the lower plate, middle plate and upper plate together in sequence to form the main body of the flat antenna. The connection is made by welding instead of traditional screw connection, which ensures the airtightness and reliability of the connection strength while avoiding the various limitations of traditional screw connection.

[0018] 2. This utility model uses a metal plating layer and a thickening layer for metallization treatment. The metal plating layer avoids problems such as sharp corner plating defects and insufficient adhesion, while the thickening layer ensures stability, thereby guaranteeing the stability of the product.

[0019] 3. This utility model further improves the connection strength by using nuts embedded around the surface of the upper plate and screws to tighten the connection. Attached Figure Description

[0020] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts.

[0021] in:

[0022] Figure 1 This is a schematic diagram of the layered structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the welded bar of this utility model.

[0024] The diagram shows the following labels: 1. Flat panel antenna body; 11. Lower plate; 12. Middle plate; 13. Upper plate; 14. Welding rib; 15. Heat conduction hole. Detailed Implementation

[0025] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0026] like Figure 1 As shown, this utility model discloses a lightweight flat panel antenna, comprising a flat panel antenna body 1. The length, width, and height of the flat panel antenna body 1 are 390mm, 230mm, and 12.5mm, respectively. The flat panel antenna body 1 consists of three layers: a lower plate 11, a middle plate 12, and an upper plate 13. Low-temperature solder paste is printed on the opposing surfaces of the upper plate 13 and the middle plate 12, as well as on the opposing surfaces of the middle plate 12 and the lower plate 11. The low-temperature solder paste is known in the art, specifically a lead-free soldering material with a melting point of 138℃. When components cannot withstand temperatures of 200℃ or higher, low-temperature solder paste is used for soldering, which meets the soldering requirements while protecting the components. The upper plate 13 and the middle plate 12, as well as the middle plate 12 and the lower plate 11, are connected. Welding ribs 14 are provided between the boards 11. The low-temperature solder paste is a certain distance away from the edge of the channel of the welding rib 14, and the distance between the low-temperature solder paste and the edge of the channel of the welding rib 14 is not less than the unidirectional flow distance when the low-temperature solder paste melts, leaving space for solder flow while ensuring that solder does not flow into the channel. The main body 1 of the flat antenna is fixed in the welding fixture. The bottom is heated by a heating platform, and the top is heated by a heating plate with heating tubes, so that the welding ribs 14 are welded to the low-temperature solder paste. Welding replaces the traditional screw connection, ensuring the connection airtightness and connection strength reliability while avoiding the various limitations of the traditional screw connection. At the same time, the welding fixture acts as a pressure block to apply pressure to the easily deformable thin-walled structure, ensuring the stability of the product. Figure 2 As shown, multiple heat-conducting holes 15 are provided on the welding rib 14. These holes 15 are located in the non-functional area of ​​the flat antenna body 1 to ensure good heat conduction. The upper surface of the upper plate 13 is uneven. Six nuts are embedded in the recessed area of ​​the upper plate 13 around its perimeter. The six nuts are distributed as follows: two are set along the width of the upper plate 13, and three are set at equal intervals along the length of the upper plate 13. The nuts are used to tighten the screws that pass through the lower plate 11, the middle plate 12, and the upper plate 13 from top to bottom. The screws are used in conjunction with the nuts for fixing, which further improves the connection strength. The six nuts are arranged at intervals along the perimeter of the upper plate 13, and the top surface of each nut is not higher than the top surface of the upper plate 13 to ensure the stability of the product.

[0027] Example 1

[0028] The main body 1 of the flat panel antenna uses a density of 1.312 g / cm³. 3The material plate is made of PEEK material to ensure lightweight. During the processing, the rough machining allows for deformation. It is then baked in an oven at 170℃ for 30 minutes. After natural cooling and static release of stress, it is finely shaped to obtain the material, ensuring flatness. After degreasing, the material is coated with magnetron sputtering (PVD). The material is uniformly coated with film on the upper surface of the upper plate 13 and the lower surface of the lower plate 11 in a circular sputtering furnace. The bottom layer is titanium plated, forming a titanium layer. The surface of the titanium layer is plated with copper, forming the first copper layer, forming a metal layer with a total thickness of 0.4μm. The first copper layer is electroplated with copper to thicken it, forming the second copper layer. The surface of the second copper layer is plated with silver, forming a silver layer, which increases conductivity and corrosion resistance. The coating thickness is 5μm for the second copper layer and 3μm for the silver layer, forming a thickened layer.

[0029] Example 2

[0030] The main body 1 of the flat panel antenna uses a density of 1.2 g / cm³. 3 The material plate is made of PEI material to ensure lightweight. During the processing, the material is obtained by injection molding. The flatness of the product is ensured by adjusting the injection pressure, holding pressure, front and rear mold temperature, mold reverse deformation and shaping. After the material is degreased, it is coated with magnetron sputtering (PVD). The material is uniformly coated with film on the upper surface of the upper plate 13 and the lower surface of the lower plate 11 in a circular sputtering furnace. The bottom layer is titanium plated, which is the titanium layer. The surface of the titanium layer is copper plated, which is the first copper layer, forming a metal layer with a total thickness of 0.8μm. The first copper layer is electroplated with copper to thicken it, which is the second copper layer. The surface of the second copper layer is plated with nickel, which is the nickel layer, to increase the ability to resist oxidation and corrosion. The coating thickness is 4μm for the second copper layer and 4μm for the nickel layer, forming a thickened layer.

[0031] Metallization is achieved by using PVD as a base layer and electroplating to thicken the metal layer. The metal layer prevents problems such as sharp corners, incomplete plating, and insufficient adhesion. At the same time, the thickening layer ensures stability, thereby guaranteeing the stability of the product. In addition, the temperature of the PVD process is generally <150℃, which will not cause additional deformation of the material.

[0032] During welding, use locating pins to position and assemble the lower plate 11, middle plate 12, and upper plate 13 together from bottom to top. Place the three plates into the welding fixture, tighten the screws, and observe the solder distribution. After the solder is evenly distributed, place them on the heating table to heat up. At the same time, power on the top heating plate to heat up. Increase the temperature according to the gradient. Use a thermometer to measure the center temperature. After it reaches the preset value, increase the temperature to the solder range. After natural cooling, tighten the mounting screws. Use X-ray to observe the welding effect, test the standing wave, and test the return loss.

[0033] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A lightweight flat panel antenna, characterized in that: The antenna includes a flat panel antenna body (1), which is composed of a lower plate (11), a middle plate (12) and an upper plate (13). Low-temperature solder paste is provided on the opposite surfaces of the lower plate (11) and the middle plate (12) and the opposite surfaces of the middle plate (12) and the upper plate (13). Welding ribs (14) are provided between the lower plate (11) and the middle plate (12) and between the middle plate (12) and the upper plate (13). The welding ribs (14) are soldered to the low-temperature solder paste.

2. The lightweight flat panel antenna according to claim 1, characterized in that: The low-temperature solder paste is printed on the surfaces of the lower plate (11), the middle plate (12) and the upper plate (13), and the distance between the low-temperature solder paste and the channel edge of the welding rib (14) is not less than the unidirectional flow distance of the low-temperature solder paste when it melts.

3. The lightweight planar antenna according to claim 2, characterized in that: The welding rib (14) has multiple heat-conducting holes (15), and the multiple heat-conducting holes (15) correspond to the non-functional areas of the flat panel antenna body (1).

4. The lightweight planar antenna according to claim 3, characterized in that: The upper surface of the upper plate (13) is uneven. Multiple nuts are embedded in the recessed area of ​​the upper plate (13) around its perimeter. The nuts are used to tighten the screws that connect the lower plate (11), the middle plate (12) and the upper plate (13) from top to bottom.

5. The lightweight flat panel antenna according to claim 4, characterized in that: Multiple nuts are arranged at intervals along the edge of the upper plate (13), and the top surface of each nut is not higher than the top surface of the upper plate (13).

6. The lightweight planar antenna according to any one of claims 1-5, characterized in that: The lower surface of the lower plate (11) and the upper surface of the upper plate (13) are respectively provided with metal layers.

7. The lightweight planar antenna according to claim 6, characterized in that: The metal layer includes a titanium layer disposed on the surfaces of the lower plate (11) and the upper plate (13) and a first copper layer disposed on the surface of the titanium layer.

8. The lightweight flat panel antenna according to claim 7, characterized in that: The thickness of the metal layer is less than 1 μm.

9. The lightweight planar antenna according to claim 8, characterized in that: The surface of the metal layer is further provided with a thickening layer.

10. The lightweight planar antenna according to claim 9, characterized in that: The thickness of the thickened layer is less than 10 μm.

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