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A kind of antenna module and preparation method thereof

An antenna module and circuit technology, which is applied in the field of antennas, can solve the problems of large distance between the antenna and the magnetic element, large magnetic loss, thinning development and complex manufacturing process, etc., so as to simplify operation, minimize copper loss, reduce The effect of production costs

Active Publication Date: 2019-02-26
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention solves the technical problems in the prior art that the antenna module has large magnetic loss, the distance between the antenna and the magnetic element is large, the development of miniaturization and thinning cannot be achieved, and the manufacturing process is complicated.

Method used

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  • A kind of antenna module and preparation method thereof
  • A kind of antenna module and preparation method thereof

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preparation example Construction

[0020] The present invention also provides a preparation method of the antenna module, comprising the following steps:

[0021] S1, forming a roughened layer on one surface of the ferrite magnetic sheet;

[0022] S2. Coating copper paste on the roughened layer; the copper paste contains copper powder and a first solvent;

[0023] S3, performing laser cladding treatment on the copper paste coated on the surface, and forming metal copper lines on the surface of the ferrite magnetic sheet;

[0024] S4, covering the surface of the metal copper circuit with a protective film.

[0025] The present invention provides a preparation method of the antenna module, which, on the one hand, minimizes the distance between the antenna and the ferrite by directly manufacturing the antenna line on the ferrite magnetic sheet, and maximizes the ferrite bondage. The effect of the magnetic field line maximizes the performance of the antenna module; on the other hand, laser cladding is used to rem...

Embodiment 1

[0056] (1) Preparation of copper paste: Add 48 parts by weight of flake copper powder with a powder particle size of 1-10 microns, 43 parts by weight of organic solvent, 1 part by weight of dispersant, and 8 parts by weight of binder in a vacuum glove box. In the ball mill jar, lock tightly. The organic solvent is terpineol, the binder is ethyl cellulose, the dispersant is glycerin, the solid content of the slurry is 48wt%, and the viscosity of the slurry at room temperature is 10WCP. Put the locked vacuum ball mill jar into a ball mill for ball milling for 2 hours at a speed of 25 Hz. After the slurry is ball milled, the balls are filtered out and the balls are vacuumed to defoam until no obvious bubbles come out visually, and then aged for 24 hours for later use.

[0057] (2) Porous layer slurry preparation: Add the same ferrite powder raw material, organic solvent, dispersant, binder and pore-forming agent as the base material of the nickel-copper-zinc ferrite magnetic she...

Embodiment 2

[0064] (1) Preparation of copper paste: same as in Example 1.

[0065] (2) Preparation of porous layer slurry: same as in Example 1.

[0066] (3) Forming of the ferrite porous layer: the same as in Example 1.

[0067] (4) Copper paste printing on the front side of ferrite: same as Example 1.

[0068] (5) Laser cladding: Seal the high-power laser of Han's Laser with a transparent box, fill it with argon gas for protection, then heat the ferrite magnetic sheet that has passed step (4) to 200°C, and then turn on the laser device for laser melting Covering treatment, laser conditions: the laser wavelength is 10640nm, the laser power is 25W, the irradiation speed is 800mm / s, and the frequency is 50KHz.

[0069] (6) Copper wire coating protection: same as in Example 1.

[0070] (7) Ferrite film protection: same as Example 1.

[0071] Through the above steps, the antenna module of this embodiment is obtained, denoted as S2.

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Abstract

The invention provides an antenna module and a preparation method thereof. The preparation method comprises the steps that S1, an armoring layer is formed on one surface of a ferrite magnetic sheet; S2, the armoring layer is coated by copper paste containing copper power and a first solvent; S3, laser cladding processing is carried out on the copper paste coated on the surface, and a metallic copper line is formed on the surface of the ferrite magnetic sheet; and S4, the surface of the metallic copper line is covered by a protective film. The invention further provides the antenna module which is prepared through the method. According to the method provided by the invention, the distance between an antenna and a ferrite is minimized; the function of bonding a magnetic line of the ferrite is maximized; the performance of the antenna module is maximized; copper loss is minimized; the defects of high resistance and high loss of a simple printing antenna are avoided; and the antenna performance is ensured.

Description

technical field [0001] The invention belongs to the technical field of antennas, and in particular relates to an antenna module and a preparation method thereof. Background technique [0002] When the antenna module is applied to a portable information terminal, due to the influence of the eddy current effect of nearby metal parts, the communication distance is greatly reduced, and even cannot respond. By adding a ferrite magnetic sheet between the antenna and the metal part, the metal part is shielded with a high-μ soft ferrite material, so as to achieve the purpose of improving the antenna inductance performance and increasing the communication distance. [0003] As components such as mobile phones continue to be miniaturized and thinned, the requirements for the thickness of the antenna module are also increasing, so it is necessary to prepare an antenna module product with a smaller thickness. At present, the antenna modules in the prior art are generally manufactured b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/38
Inventor 刘梦辉孔宪君陈大军
Owner BYD CO LTD