LDS antenna structure based on laser solder paste welding

Abstract

The utility model relates to an LDS antenna structure based on laser solder paste welding, which comprises a plastic support, an antenna component and an antenna radiation circuit, the antenna radiation circuit is arranged on the plastic support through an LDS process, solder paste is arranged at the position of a bonding pad of the antenna radiation circuit, and the solder paste is arranged on the plastic support. And the component is placed at the position of the bonding pad with the solder paste and is welded and conducted with the antenna radiation circuit through a laser solder paste welding process to form a complete antenna circuit. According to the utility model, the requirement on high temperature resistance of a plastic bracket is avoided, on one hand, component welding on conventional temperature-resistant plastic can be realized, the limitation of material selection of the plastic bracket is greatly improved, and the influence of a high-temperature process on a product is avoided; and on the other hand, the flexibility of the support structure design and the antenna radiation circuit design is greatly improved, and the manufacturing cost of the antenna of the type can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of wireless communication, and particularly relates to an LDS antenna structure based on laser solder paste welding. Background Art

[0002] With the development of communication technology, the frequency band range that an antenna needs to cover is increasing, and the requirements for antenna performance are also getting higher and higher. For some antennas with space limitations and high requirements for frequency bands and performance, adding auxiliary frequency modulation components such as resistors, capacitors, inductors, etc. to the antenna circuit can often achieve good results.

[0003] Traditional FPC antennas are difficult to attach to three-dimensional curved surfaces. Antennas with high requirements for multi-band and high performance have high requirements for space utilization. The limitations of FPC attachment often limit their use.

[0004] Traditional LDS antenna forms need to achieve the connection of components in the circuit through soldering with a soldering iron tip and solder wire or in the form of SMT. On the one hand, such soldering processes require a large operating space around the components, which will limit the flexibility of antenna design. On the other hand, special high-temperature-resistant LDS materials need to be used. Not only is the material price high, but the product is prone to deformation under high-temperature conditions, and the production efficiency is also low.

[0005] Laser solder paste welding is a laser welding technology that uses laser as a heat source to heat and melt the solder paste. The main feature of laser solder paste welding is to use the high energy of the laser to achieve rapid heating of a local or micro area to complete the soldering process. The laser first preheats the solder paste. While the solder paste is being preheated, the solder joints will also be preheated. Then, the high temperature melts the solder paste into solder liquid, allowing the solder liquid to completely wet the pads, and finally forming a weld.

[0006] The main features of laser solder paste welding are as follows:

[0007] 1. Laser solder paste welding only locally heats the solder joint part, and basically has no thermal impact on the pads and the component body.

[0008] 2. The solder joint is rapidly heated to the set temperature. After local heating, the solder joint cools quickly, rapidly forming an alloy layer. The joint structure is fine and the reliability is high.

[0009] 3. Laser solder paste welding belongs to non-contact processing, without the stress generated when a soldering iron touches the solder, and no static electricity is generated.

[0010] 4. The temperature feedback speed is fast, and the temperature can be accurately controlled to meet different welding requirements.

[0011] 5. The laser processing accuracy is high. The laser spot can be controlled to a minimum of 0.2 mm, and the processing accuracy is much higher than that of traditional electric soldering irons.

[0012] 6. Contactless welding can meet the application requirements even for complex solder joints.

[0013] The utility model provides an LDS antenna structure formed based on laser solder paste welding technology, which solves some bottlenecks and drawbacks faced when traditional LDS antennas need to weld components. Summary of the Utility Model

[0014] The purpose of the utility model is to overcome the problems existing in the prior art and provide an LDS antenna structure based on laser solder paste welding. On the one hand, it can achieve the welding of components on conventional temperature-resistant plastics, greatly improving the material selection limitations of plastic brackets and avoiding the influence of high-temperature processes on products; on the other hand, the flexibility of the bracket structure design and the antenna radiation circuit design is also greatly improved, and at the same time, the manufacturing cost of this type of antenna can be reduced.

[0015] To achieve the above technical purposes and reach the above technical effects, the utility model is realized through the following technical solutions:

[0016] An LDS antenna structure based on laser solder paste welding includes a plastic bracket, antenna components, and an antenna radiation circuit. The antenna radiation circuit is arranged on the plastic bracket through the LDS process. Solder paste is provided at the pad positions of the antenna radiation circuit. The antenna components are placed at the pad positions with solder paste and are welded and conducted with the antenna radiation circuit through the laser solder paste welding process to form a complete antenna circuit.

[0017] Further, the surface of the plastic bracket covering the antenna radiation circuit is a plane.

[0018] Further, a part of the surface of the plastic bracket covering the antenna radiation circuit is a curved surface.

[0019] Further, the antenna components are electronic components or weldable metal parts.

[0020] Further, the number of the antenna radiation circuit and the antenna components is single or multiple.

[0021] The beneficial effects of the utility model are:

[0022] 1. The plastic bracket and the antenna radiation circuit have a high degree of design freedom. The laser can directly irradiate the welding area, and there is no need to consider the process operation space required for soldering iron head and solder wire welding or SMT welding.

[0023] 2. The plastic bracket does not require specific high-temperature-resistant materials, and the material price is low.

[0024] 3. The welding is contactless welding, no static electricity is generated, and it will not damage the antenna components.

[0025] 4. The processing accuracy of the welding is high.

[0026] 5. It can meet the application requirements of complex solder joints. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 FIG. is a schematic structural diagram of the antenna radiation circuit of the present utility model arranged on a plastic bracket through the LDS process;

[0028] Figure 2 FIG. is a schematic structural diagram of the present utility model with solder paste arranged at the pad position of the antenna radiation circuit;

[0029] Figure 3 FIG. is a schematic structural diagram of the present utility model when the antenna components are placed at the pad positions with solder paste and the welding is completed.

[0030] Description of the reference numerals in the figures: 1, plastic bracket; 2, antenna components; 3, antenna radiation circuit; 4, solder paste. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The present utility model will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0032] An LDS antenna structure based on laser solder paste welding includes a plastic bracket 1, antenna components 2 and an antenna radiation circuit 3. As Figure 1 shown, the antenna radiation circuit 3 is arranged on the plastic bracket 1 through the LDS process. As Figure 2 shown, solder paste 4 is provided at the pad position of the antenna radiation circuit 3. As Figure 3 shown, the antenna components 2 are placed at the pad positions with solder paste 4 and are welded and conducted with the antenna radiation circuit 3 through the laser solder paste welding process. Here, the laser irradiation heats up to melt the solder paste 4 for the welding of the antenna components 2 and the antenna radiation circuit 3, forming a complete antenna circuit.

[0033] The surface of the plastic bracket 1 covering the antenna radiation circuit 3 is a plane.

[0034] The part of the surface of the plastic bracket 1 covering the antenna radiation circuit 3 is a curved surface. In this embodiment, a groove curved surface is provided in the middle and lower part of the plastic bracket 1, and a part of the antenna radiation circuit 3 is arranged along the groove curved surface, and the pads of the antenna radiation circuit 3 are located at the lowest part of the groove curved surface.

[0035] The antenna components 2 are electronic components or weldable metal parts.

[0036] The number of the antenna radiation circuit 3 and the antenna components 2 is single or multiple.

[0037] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An LDS antenna structure based on laser solder paste welding, comprising a plastic bracket (1), antenna components (2) and an antenna radiation circuit (3), characterized in that, The antenna radiation circuit (3) is arranged on the plastic bracket (1) through the LDS process. Solder paste (4) is provided at the pad positions of the antenna radiation circuit (3). The antenna component (2) is placed at the pad positions with solder paste (4) and is welded and electrically connected to the antenna radiation circuit (3) through the laser solder paste welding process to form a complete antenna circuit.

2. The LDS antenna structure based on laser solder paste welding according to claim 1, characterized in that The surface of the plastic bracket (1) covering the antenna radiation circuit (3) is a plane.

3. The LDS antenna structure based on laser solder paste welding according to claim 1, wherein The part of the surface of the plastic bracket (1) covering the antenna radiation circuit (3) is a curved surface.

4. The LDS antenna structure based on laser solder paste welding according to claim 1, wherein The antenna component (2) is an electronic component or a weldable metal part.

5. The LDS antenna structure based on laser solder paste welding according to claim 1, characterized in that, The number of the antenna radiation circuits (3) and the antenna components (2) is single or multiple.

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