KR20060133239A - Manufacturing method of portable antenna and apparatus using thereof - Google Patents

Abstract

A method for fabricating an antenna for a mobile phone and an antenna apparatus using the same are provided to improve a fabrication process and repeatability in mass production, by forming a radiating element of an outer antenna or an embedded antenna by forming a conductive metal film on the dielectric surface. In a method for fabricating an antenna for a mobile phone for wireless communication, a dielectric of non-plated material is formed. A plating dielectric is insert-injected in a shape of a radiating element on the dielectric of non-plated material. A conductive metal film is formed on the shape of the radiating element of the insert-injected conductive dielectric. A feeding unit is assembled in the dielectric where the conductive metal film is formed. An outer cover is assembled in the dielectric where the feeding unit is assembled.

Description

Manufacturing method of antenna for portable terminal and antenna device using same TECHNICAL FIELD

Figure 1a is a view showing the assembled state of the helical antenna according to the prior art.

1B is a view showing an assembled state of a print antenna according to the prior art.

Figure 1c is a view showing the assembled state of the built-in antenna according to the prior art.

2 is a process chart showing a manufacturing method of an antenna for a portable terminal according to the present invention;

3 is a diagram illustrating a manufacturing process of an external antenna for a portable terminal according to the present invention;

4 is a view showing an assembled state of an external antenna for a portable terminal according to the present invention;

Figure 5 is a view showing a cross section of the plating portion of the external antenna for a portable terminal according to the present invention.

6 is a view showing a manufacturing process of a built-in antenna for a mobile terminal according to the present invention.

Figure 7 is a side cross-sectional view showing a feed terminal of the built-in antenna for a portable terminal according to the present invention.

8 is a view showing a detailed cross-section of the plating portion of the built-in antenna for a portable terminal according to the present invention.

9A and 9B show measurement data of an antenna for a mobile terminal according to the present invention.

※ Explanation of codes for main parts of drawing

101, 112, 205. Fastening means 102. Bobbins

103. Helical coil 104, 115, 206. Cover

111. Mounting means 113. Contacts

114. Printed board 116. Conductor pattern

121. Copy 122. Base

123. First feed terminal 124. Second feed terminal

125. Protrusion 126. Clearance

201, 301. Unplated dielectric 202, 302. Element formation portion

203, 303. Plating part 204, 304. Plating part

207. Protrusion 305. Feed hole

306. Short circuit hole 307. Feed pin

307-1. Feed terminal 308. Short circuit pin

      The present invention relates to an antenna for a mobile terminal, and more particularly, after molding a non-plating dielectric into a predetermined shape and inserting a plateable dielectric into a pattern to be plated on the surface of the formed dielectric, the surface of the dielectric The present invention relates to a method of manufacturing an antenna for a portable terminal by manufacturing a radiation device by forming a conductive metal film thereon and then assembling a power supply means and an outer cover, and an antenna device using the same.

      In general, portable terminals for wireless communication have been developed for the purpose of miniaturization, multifunction, light weight, and low power, and an antenna is essentially used for transmitting and receiving high frequency signals in base stations and terminals. In particular, since the performance of the small antenna used in the portable terminal varies depending on the type and material of the terminal mounted as well as the user's use state, there is a difficulty in that the design depends on the terminal model to obtain the optimal performance. .

      In the field of antennas for terminals, conventionally, a retractable antenna or a stubby antenna has been widely used. Such antennas have a helical antenna having a spiral shape that protrudes from the top of the terminal. Use has the effect of shortening its physical length. In addition, in recent years, the use of the built-in antenna is increasing in order to make the terminal more versatile and beautiful in appearance.

      1A to 1C are diagrams illustrating the assembling state of the antennas according to the related art, and show examples of a helical antenna, a print antenna, and a built-in antenna, respectively. As shown in FIG. 1A, in the conventional method of manufacturing a helical antenna, a metal fixing means 101 and a helical coil 102 connected to a circuit part in a terminal are connected by soldering or the like, and a dielectric bobbin 103 is connected to the helical coil. After the fitting, the cover 104 made of a synthetic resin-based material which is covered by being connected to the outer circumferential surface of the fixing means is bonded by bonding.

      In addition, as shown in FIG. 1B, a conventional method of manufacturing a printed antenna includes a mounting means 111 fitted into a portable terminal in a snap-in manner, and a slit formed at a predetermined position below the mounting means. A contact substrate 113 protruding to the outside and connected to an internal circuit of the mobile terminal, and a printed circuit board 114 coupled to the mounting means and electrically connected to the contact portion, and having a conductor pattern 116 formed thereon. It is composed of a fixing means 112 to be fitted and assembled, and a cover 115 for protecting the antenna is coupled to the mounting means and the like.

      However, such an antenna according to the related art generally uses an adhesive or the like to assemble the covers 104 and 115 surrounding the helical coil 102 or the printed board 114, which is a radiator, so that various characteristics of the antenna are degraded after assembly. There was a problem. That is, when the antenna is manufactured by the conventional bonding method, the bonding part is not uniform and the characteristics of the antenna are deteriorated and the appearance is not beautiful and the robustness of the product is also deteriorated by the influence of the heterogeneous adhesive. there was.

      The present invention is to improve the above problems, the antenna according to the present invention inserts the plateable dielectric in a pattern to be plated on the dielectric surface of the non-plating material and form a conductive metal film to radiate the external or internal antenna It is an object of the present invention to provide an antenna for a portable terminal and a method of manufacturing the same, which not only improve the manufacturing process but also provide excellent reproducibility and reduce manufacturing cost in mass production.

      In order to achieve the above object, the present invention, the first step of forming a non-plated dielectric material 201, 301 into a predetermined shape; and a plateable dielectric in the shape of the radiation element to the molded non-plated material dielectric ( A second step of insert-injecting 203 and 303; and a third step of forming conductive metal films 204 and 304 in the shape of the radiating element of the insert-exposed plated dielectric; and feeding the dielectric on which the conductive metal film is formed. A fourth step of assembling the means (205, 307, 308); And a fifth step of assembling the outer cover 206 to the dielectric to which the power supply means is assembled.

      In addition, in order to achieve the above object, an external antenna for a portable terminal according to the present invention inserts and inserts a plateable dielectric 203 into a pattern to be plated on the surface of the non-plating dielectric 201 having a predetermined shape. A radiation element fabricated by forming a metal film 204; and a fixing thread 205 mounted on a portable terminal having a screw thread at a lower portion thereof, and a protrusion 207 formed at an upper portion thereof to be inserted and assembled at a lower portion of the radiation element. ; And an outer cover 206 that is covered and assembled on an upper portion of the fixing means.

      In addition, in order to achieve the above object, the built-in antenna for a mobile terminal according to the present invention has a predetermined shape and is formed of a non-plating material in which one feeding hole 305 and at least one shorting hole 306 are formed at a predetermined position. A radiation element manufactured by insert-injecting a plateable dielectric 303 into a pattern to be plated on the surface of the dielectric 301 and forming a conductive metal film 304; and a power supply pin fitted into the feeding hole and the shorting hole, respectively. 307); And a shorting pin 308.

      Hereinafter, a method of manufacturing an antenna for a portable terminal and an antenna device using the same according to the present invention will be described in detail with reference to the accompanying drawings. In the following description, the same or corresponding members will be denoted by the same reference numerals and detailed description thereof will be omitted.

      2 is a process chart showing a manufacturing method of an antenna for a portable terminal according to the present invention. As described above, the present invention is a first step of forming the non-plating dielectric 201, 301 into a predetermined shape, the plated dielectric in the shape of the radiation element to the non-plating dielectric formed in the first step ( A second step of insert-injecting 203 and 303, a third step of forming conductive metal films 204 and 304 in the plated dielectric insert-inserted in the second step, and a feeding means 205 to the dielectric on which the conductive metal film is formed , 307, 308, and a fifth step of assembling the outer cover 206 to the dielectric to which the power supply means is assembled.

      The first step is to form the non-plating dielectric 201 and 301 into a predetermined shape, and the non-plating dielectric such as urethane or polycarbonate (PC) may be formed into a cylindrical or hexahedron. The shape of the radiation element on the outer circumferential surface or upper portion is formed in an embossed or engraved shape. In this first step, a method of cutting or injection molding may be used.

      In the second step, inserting the plateable dielectrics 203 and 303 into the shape of the radiating element to the non-plating dielectric formed in the first step, in the embodiment of the present invention, acrylonitrile and Butadiene (butadiene) copolymer and styrene (styrene) and butadiene mixed with a hybrid ABS for plating was used.

      In the third step, the conductive metal films 204 and 304 are formed on the insert-coated plated dielectric in the second step, but gold, silver or copper having excellent conductivity may be used, but is not limited thereto. In addition, the method of forming the conductive metal film may be used by plating, or by insert injection, deposition, or the like as in the second step.

      The fourth step is a step of assembling the power supply means (205, 307, 308) to the dielectric with the conductive metal film is formed in the manner that the fixing means 205 is fitted in the case of an external antenna, the feed pin in the case of an internal antenna 307 and shorting pin 308 are assembled in a fitted manner.

      The fifth step is a step of assembling the outer cover 206 to the dielectric with the power supply means is assembled by bonding or insert injection in the case of an external antenna, and embedded in a mobile terminal in the case of an internal antenna, so this step It is omitted.

      3 is a diagram illustrating a manufacturing process of an external antenna for a portable terminal according to the present invention. First, by forming the dielectric 201 of the non-plating material such as urethane or polycarbonate in the shape of a cylindrical or square pillar by the first step described above in Figure 3a, as shown by the diagonal line The shape of the radiation element is embossed or engraved. In this case, the manufacturing method may be cut or injection-molded by numerical control (NC) as described above.

      In (b) of FIG. 3, the plateable dielectric 203 is insert-injected in the shape of a radiation element as indicated by a dotted line on the non-plated dielectric formed in the first step. In the present invention, an ABS for plating was used as an example.

      Subsequently, in (c) of FIG. 3, the conductive metal film 204 is formed on the insert-coated plated dielectric. In general, gold, silver, or copper having excellent conductivity may be used, but the present invention is limited thereto. It doesn't work. In addition, the conductive metal film may be formed by plating or insert injection.

      3 (d) shows the power supply means 205 assembled to the dielectric having the conductive metal film formed thereon. The external antenna for a portable terminal according to the present invention is assembled in such a manner that the fixing means 205 is fitted to the dielectric having the conductive metal film formed thereon.

      Next, (e) of FIG. 3 shows that the outer cover 206 is assembled to the dielectric to which the power supply means is assembled. In this case, the prefabricated external cover is bonded to the power supply means and bonded or the power supply means is assembled. The method of insert-injecting an outer cover into the prepared dielectric is used.

      FIG. 4 is a view illustrating an assembly state of an external antenna for a mobile terminal according to the present invention, wherein the conductive metal film 204 is formed under the dielectric 201 formed by the process of FIGS. 3A to 3C. The outer cover 206 is assembled after the fixing means 205 is fitted. At this time, the fixing means is provided with a screw thread in the lower portion is mounted on the portable terminal and the protrusion 207 is formed on the upper portion of the fixing means is fitted into a hollow hole (not shown) in the lower portion of the dielectric to be assembled.

      5 is a view showing a detailed cross-section of the plating portion of the external antenna for a mobile terminal according to the present invention, Figure 5 (a) is embossed in the form of the radiation element and Figure 5 (b) is the form of the radiation element It is formed by engraved. That is, in FIG. 5 (a), a copy element is formed on the outer circumferential surface of the non-plated dielectric 201 by embossing, inserting the plateable dielectric 203 therein, and then applying a conductive metal film 204. . In addition, in FIG. 5B, the plated dielectric 203 and the conductive metal film 204 are coated on the outer circumferential surface of the non-plated dielectric 201 in an intaglio manner.

      At this time, the width L1 of the radiation element formed by the embossment of FIG. 5 (a) becomes relatively wider than the width L2 of the radiation element formed by the intaglio of FIG. 5 (b), so that the radiation effect of the antenna is good and the bandwidth is increased. While this has a widening effect, the outer diameter of the antenna becomes thicker.

      FIG. 6 is a view illustrating a manufacturing process of a built-in antenna for a portable terminal according to the present invention, and is manufactured in the same manner as in FIG. First, the dielectric 301 of a non-plating material such as urethane or polycarbonate is molded into a hexahedral shape by the first step described above with reference to FIG. To be embossed or engraved. In this case, the manufacturing method may be cut or injection-molded by numerical control (NC) as described above.

      In (b) of FIG. 6, the plateable dielectric 303 is insert-injected into the shape of the radiation element as indicated by the dotted line on the non-plated dielectric formed in the first step. In the present invention, an ABS for plating was used as an example.

      Subsequently, in (c) of FIG. 6, the conductive metal film 304 is formed on the insert-coated plated dielectric. In general, gold, silver, or copper having excellent conductivity may be used, but the present invention is limited thereto. It doesn't work. In addition, the conductive metal film may be formed by plating or insert injection.

      6 (d) shows that the power supply means 307 and 308 are assembled to the dielectric having the conductive metal film formed thereon. In the built-in antenna for a mobile terminal according to the present invention, a feed pin 307 is fitted into one feed hole 305 formed at a predetermined position of the dielectric on which the conductive metal film is formed, and at least one short circuit hole 306 has a short circuit pin ( 308 is assembled in a fitted manner.

      7 is a side sectional view showing a power supply terminal of a built-in antenna for a portable terminal according to the present invention. As shown in the cross section of FIG. 7, unlike FIG. 6, a separate feed pin 307 and a short circuit pin 308 are not assembled, and the feed terminal 307-1 extends to a lower predetermined position of the dielectric. And a short terminal (not shown) are integrally formed, and then a conductive metal film is formed. Therefore, since the fourth step is omitted in the embodiment of FIG. 7, the built-in antenna may be manufactured only by the first to third steps.

      8 is a view showing a detailed cross-sectional view of the plating portion of the built-in antenna for a portable terminal according to the present invention, Figure 8 (a) shows the prior art and Figure 8 (b) shows the present invention. As shown in FIG. 8 (a), the prior art is assembled by flattening the protrusions by heat after the radiator 121 is inserted into a plurality of protrusions 125 formed at a predetermined position of the base portion 122. There is a gap 126 between t between the base and the copy.

      On the contrary, in FIG. 8B, the present invention forms the shape of the radiation element on the outer circumferential surface of the non-plating dielectric 301 by embossing or engraving the insert, and inserting the plateable dielectric 303 thereon, and then again conducting a conductive metal film. 304 is applied. Therefore, according to the present invention, since the gap 126 as in the prior art is not formed, not only the overall height of the antenna is lowered, but also the shape of the antenna as shown in part A of FIG. 8 (b) is curved along the surface. There is an advantage that the radiation element can be freely formed.

In particular, as shown in FIG. 8A, when the gap t has a gap t, a base portion having a larger dielectric constant than air (ε _r > ε ₀ = 1) and an air layer having a dielectric constant of 1 (ε ₀ = 1) are mixed. The antenna characteristic is changed due to the difference in dielectric constant, but in the embodiment of the present invention, the gap is not formed, so the antenna characteristic is uniform.

      9A and 9B are diagrams showing measurement data of a portable terminal antenna according to the present invention, and show voltage standing wave ratios (VSWR) and radiation characteristics in a horizontal plane, respectively. As shown in FIG. 9A, the antenna according to the present invention operates by resonating to a mobile phone band of 824 to 894 MHz, a GPS band of 1.575 GHz, and a personal mobile communication band of 1.85 to 1.99 GHz. In addition, the antenna according to the present invention, as shown in Figure 9b has an omnidirectional radiation characteristic in the horizontal plane.

      The present invention described above is not limited to the above-described embodiment and the accompanying drawings, as a person of ordinary skill in the art can be variously substituted, modified, and changed without departing from the technical spirit of the present invention.

      As described above, the antenna according to the present invention can be manufactured by improving the manufacturing process by inserting a plateable dielectric into a pattern to be plated on the surface of the non-plating material and forming a conductive metal film to form a radiation element of an external or internal antenna. In addition, it has the effect of excellent reproducibility and cost reduction in mass production.

Claims (23)

In the method of manufacturing a portable terminal antenna for wireless communication, A first step of molding the non-plating dielectric into a predetermined shape; and A second step of insert-injecting a plateable dielectric into a shape of a radiation device to the molded non-plating dielectric; and A third step of forming a conductive metal film in the shape of the insert of the insert-coated plating dielectric; and A fourth step of assembling a power supply means to the dielectric on which the conductive metal film is formed; And And a fifth step of assembling the outer cover to the dielectric assembled with the power supply means. The method of claim 1, wherein the first step, A method of manufacturing an antenna for a portable terminal, characterized in that the step of molding the non-plating dielectric into a predetermined shape and the shape of the radiation element. The method of claim 1, wherein the second step, And inserting a plating dielectric into the dielectric material of the non-plating material formed in the first step in the shape of a radiation element. The method of claim 1, wherein the third step, And a conductive metal film is formed on the shape of the radiation element of the insertable plated dielectric in the second step. The method of claim 1, wherein the fourth step, And assembling the power supply means to the dielectric on which the conductive metal film is formed in the third step. The method of claim 1, wherein the fifth step, And a step of assembling the outer cover to the dielectric in which the power supply means is assembled in the fourth step. 3. The method of claim 1, wherein the first step comprises: A method of manufacturing an antenna for a portable terminal, characterized in that the step by injection molding. 3. The method of claim 1, wherein the first step comprises: A manufacturing method of an antenna for a portable terminal, which is a step by cutting. 3. The method of claim 1, wherein the first step comprises: The method of manufacturing an antenna for a portable terminal, characterized in that the step of forming an embossed shape of the radiation element. 3. The method of claim 1, wherein the first step comprises: A method of manufacturing an antenna for a portable terminal, characterized in that the step of forming the shape of the radiation element intaglio. The method of claim 1, wherein the second step comprises: Method of manufacturing an antenna for a portable terminal, characterized in that the step by insert injection molding. 5. The method of claim 1, wherein the third step comprises: Method of manufacturing an antenna for a portable terminal, characterized in that the step by insert injection molding. 5. The method of claim 1, wherein the third step comprises: The method of manufacturing an antenna for a portable terminal, characterized in that the step by the electroplating. 5. The method of claim 1, wherein the third step comprises: Method of manufacturing an antenna for a portable terminal, characterized in that the step by the deposition. 7. The method of claim 1, wherein the fifth step comprises: Method of manufacturing an antenna for a portable terminal, characterized in that the step by insert injection molding. In the portable terminal antenna for wireless communication, After forming a non-plating dielectric into a predetermined shape, inserting a plateable dielectric into a pattern to be plated on the surface of the formed dielectric, forming a conductive metal film on the surface, and then assembling the feeding means and the outer cover. Antenna for portable terminal manufactured. In the portable terminal antenna for wireless communication, A radiation element manufactured by insert-injecting a plateable dielectric into a pattern to be plated on a dielectric surface of a non-plating material having a predetermined shape and forming a conductive metal film; and Fixing means is provided in the lower portion is mounted to the portable terminal and the protrusion is formed on the upper portion is fitted to the lower portion of the radiation element; And External cover is covered with an upper portion of the fixing means assembled; external antenna for a mobile terminal. In the portable terminal antenna for wireless communication, A radiation device manufactured by insert-injecting a plateable dielectric into a pattern to be plated on a surface of a non-plating material having a predetermined shape and having one feed hole and at least one short-circuit hole formed in a predetermined position, and forming a conductive metal film; Wow A feed pin inserted into the feed hole and the short circuit hole, respectively; And a short-circuit pin. In the portable terminal antenna for wireless communication, A radiation device manufactured by insert-injecting a plateable dielectric into a pattern to be plated on a surface of a non-plating material having a predetermined shape and having one feed hole and at least one short-circuit hole formed in a predetermined position, and forming a conductive metal film; Wow A feed terminal extending in the radiation element; And a short circuit terminal. 20. The method of any one of claims 1, 2, 3, 16, 17, 18, 19, wherein the dielectric of the non-plating material, An antenna for a portable terminal, which is a urethane series synthetic resin. 20. The method of any one of claims 1, 2, 3, 16, 17, 18, 19, wherein the dielectric of the non-plating material, An antenna for a portable terminal, characterized in that the polycarbonate-based synthetic resin. 20. The method of any one of claims 1, 3, 4, 16, 17, 18, 19, wherein the plateable dielectric, An antenna for a portable terminal, characterized in that the ABS-based synthetic resin for plating. The conductive metal film according to any one of claims 1, 4, 5, 16, 17, 18, and 19, An antenna for a mobile terminal, characterized in that it is any one of a highly conductive metal group consisting of gold, silver, and copper.

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