KR20080085306A - Method of manufacturing antenna module by laser carving - Google Patents

Abstract

A method of manufacturing an antenna module by laser carving is provided to reduce the entire height of an antenna by manufacturing the antenna on a non-planar substrate without size and shape limitations. A method of manufacturing an antenna module includes the steps of: preparing a substrate(20); attaching metal material on the substrate by a conductive coating method; and finishing the metal material to complete a shape of an antenna(10) by laser carving. The substrate is made of plastic, ceramic, paper, or an alloy of magnesium and aluminum. The substrate is planar or non-planar. The conductive coating method by spraying is spray painting, immersion, or applying and electroplating.

Description

Method of manufacturing antenna module by laser engraving {METHOD OF MANUFACTURING ANTENNA MODULE BY LASER CARVING}

1 is an exploded perspective view showing an antenna manufactured by a conventional punching method.

2 is a process flow chart of the present invention.

Fig. 3 is a perspective view showing the appearance of the first embodiment of the antenna manufactured by the present invention.

4A shows a standing wave voltage ratio (VSWR) for a conventional punching method in antenna fabrication.

4B shows a standing wave voltage ratio (VSWR) for the method of the present invention in antenna fabrication.

Fig. 5A is a diagram showing the gain in fabricating an antenna having a frequency of 880 MHz at the horizontal level in the conventional punching method.

Fig. 5B is a diagram showing the gain in fabricating an antenna having a frequency of 880 MHz at the horizontal level in the method of the present invention.

[Explanation of symbols on the main parts of the drawings]

1, 10: antenna 2: plastic plate

20: base plate

The present invention relates to a method for manufacturing an antenna module by laser engraving, and more particularly, to an antenna manufacturing method in which a laser engraving is directly used to finish a metal material attached to a base plate.

With the rapid development of mobile communication techniques, the use of portable electronic devices such as mobile phones and laptops has become more common. Since such portable electronic devices have to meet the requirement of portability, they are being developed along with the miniaturization trend, and thus the size of the internal devices is further reduced. The most common antenna that meets this trend is a planar antenna.

In manufacturing such a conventional planar antenna, as shown in Fig. 1, the antenna 1 made of a metallic material (e.g., copper) is formed by punching, and then fixed to the plastic plate 2 so that the antenna is Forming a combination. Due to the fact that the antenna 1 made of a metallic material is formed by punching, the precision is not sufficient and thus cannot be used for the formation of a small antenna, so that a conventional antenna combination is a conventional portable electronic plane Inevitably, the antenna occupies a considerable amount of space.

In addition, due to the fact that the antenna 1 made of a metallic material is formed by punching, the shape of the antenna 1 is limited only to the formation of a flat plate which is fixed to the plastic plate 2, and thus can be fixed to a non-flat plastic plate. This creates another problem in manufacturing and needs to be addressed.

According to International Patent Application No. PCT / IL2005 / 000611, filed Dec. 22, 2005 and entitled "Three-Dimensional Antenna Formed Using Wet Conductive Material and Its Manufacturing Method", the method for manufacturing an antenna includes a base plate having a three-dimensional surface. And the base plate having a three-dimensional surface is treated with a conductive coating to form an antenna on at least one surface.

Since the prior art (the international patent application) forms a three-dimensional antenna by a conductive coating technique and requires broadband and compactness in an electronic device, the shape of the antenna becomes more complicated, and a simple technique alone of conductive coating It is no longer possible to manufacture the shape and pattern of the required antenna.

The present invention provides a new method of fabricating an antenna by laser engraving for defects that existed in conventional planar antenna manufacture; The metal material is attached by a conductive coating method by spraying onto the base plate, and laser engraving is used to finish the shape of the antenna by finishing the metal material. The base plate is made of plastic, ceramic, paper, or an alloy of magnesium and aluminum; Since the base plate is part of the portable electronics, the entire antenna is no longer space-limited, which can meet the above requirements for compactness, and the antenna is complicated or compact since the shape of the antenna is completed by laser engraving. The shape can be taken, and the range of use in manufacturing the antenna can be extended.

On the other hand, since the shape of the antenna in the present invention is completed by the finishing of laser engraving with extremely high precision, this technique can thus be used to produce antennas of various sizes.

In addition, since the present invention completes the antenna shape by laser engraving after the base plate is processed by spraying the conductive coating material or after the general shape of the antenna is formed, the base plate can take a non-planar shape such as an arcuate or 3D shape. have.

In addition, the method of the present invention can be applied to the fabrication of a matched circuit board on a base board, and also to the surface sticking technic (STM) for applying tin solder to a printed circuit board.

Other objects, features and advantages of the present invention will be more clearly understood by the following detailed description with reference to the accompanying drawings.

In Figure 2, which is a process flow diagram of the present invention, the processing step includes providing a base plate 20, attaching a metal material to the base plate 20 by a conductive coating method by spraying, and antenna by laser engraving. Finishing the metal material to complete the shape of (10).

In FIG. 3 showing the first embodiment of the antenna manufactured by the present invention, after the metal material is attached to the base plate 20 by the conductive coating method by spraying, the metal material is trimmed by laser engraving. The shape of the antenna 10 is completed. Conductive coating by spraying, which may be a method including spray painting, immersion, application, electroplating, and the like, attaches a conductive metal material, such as copper, silver, to the base plate 20. The material of the base plate 20 may be plastic, ceramic, paper, or an alloy of magnesium and aluminum; Or as a part or housing of an internal circuit board of a portable electronic product. Thus, the base plate 20 need not be flat, but may be formed non-flat, such as an arch or a 3D shape.

4A and 4B and 5A and 5A show antennas of the same shape provided for experimental comparison, which antennas are conventional punching method (shown in FIG. 1) and the method of the present invention (shown in FIG. 3). Are each produced by.

4A shows a standing wave voltage ratio (VSWR) for a conventional punching method in antenna manufacturing, and FIG. 4B shows a standing wave voltage ratio (VSWR) for a method of the present invention in antenna manufacturing. The situations are very similar to each other. Fig. 5A is a diagram showing the gain of an antenna with a frequency of 880 MHz at the horizontal level in the conventional punching method, and Fig. 5B is a diagram showing the gain of an antenna with a frequency of 880 MHz at the horizontal level in the method of the present invention. As the illustrated diagram, the largest gain and the average gain in these two figures are almost similar to the others. Therefore, the antenna produced by the method of the present invention is practical.

In addition, it can be used for the manufacture of the antenna, and at the same time, the manufacturing method by the laser engraving of the present invention can be applied to the manufacture of the matching circuit on the base plate; For example, the base plate is treated by spraying copper in advance, and the matching circuit board may be completed by laser engraving, so the present invention may be applied to a surface fixing technique (STM) for applying tin solder to a printed circuit board. Such content is within the scope of the present invention.

The present invention has been described with reference to the preferred embodiments, and is not limited thereto, and one of ordinary skill in the art should recognize that various modifications and changes can be made to the present invention without departing from the appended claims.

The manufacturing method of the present invention is not limited in size and shape of the antenna, and since the antenna can be manufactured on a non-flat base plate, the height of the entire antenna can be reduced.

Claims (5)

In the method of manufacturing the antenna by laser engraving, Providing a base plate, Attaching a metal material to the base plate by conductive coating by spraying, And finishing the metal material to complete the shape of the antenna by laser engraving. The method of claim 1 wherein the material of the base plate is selected from plastics, ceramics, paper, or alloys of magnesium and aluminum. The method of claim 1, wherein the base plate is flat. The method of claim 1, wherein the base plate is non-flat. 2. The method of claim 1, wherein the conductive coating by spraying method for attaching the metal material to the base plate is selected from spray painting, immersion, application and electroplating.

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