KR101128434B1

KR101128434B1 - Internal antenna

Info

Publication number: KR101128434B1
Application number: KR1020100121272A
Authority: KR
Inventors: 류병훈; 성원모; 임재현
Original assignee: 주식회사 이엠따블유
Priority date: 2010-12-01
Filing date: 2010-12-01
Publication date: 2012-03-23

Abstract

PURPOSE: An internal antenna is provided to apply an inductor function using a conductive pattern which is electrically connected to a radiation patch which receives and transmits a wireless signal, thereby reducing manufacturing costs of the antenna by omitting a separate inductor device. CONSTITUTION: A base frame(102) comprises at least a pair of mutually separated through-slots(104). One or more sidewalls of the through-slots are formed into a slanted surface. The through-slot has a wider shape in a single opening direction. An emitter patch is arranged on the surface of the base frame in order to transmit/receive a wireless signal. A conductive pattern(106) is arranged into a spiral shape between the through-slots.

Description

Built-in Antenna {INTERNAL ANTENNA}

The present invention relates to a built-in antenna, and more particularly, to a built-in antenna that can implement the function of the inductor using a conductive pattern.

An antenna plays a role of transmitting and receiving signals in a mobile communication terminal and is a key device for determining the quality of wireless communication. Recently, with the development of IT technology, mobile communication terminals are becoming smaller and lighter, and antennas mounted on the mobile communication terminals have been replaced with internal antennas in order to meet these trends. Furthermore, in order to further reduce and lighten the size of the mobile communication terminal in the state of applying the built-in antenna, research on a method of maintaining the performance of the built-in antenna or increasing it while simplifying the configuration is further conducted. .

Embodiments of the present invention are to provide a configuration that can implement the inductor function using a conductive pattern.

The built-in antenna according to an embodiment of the present invention for solving the above problems is formed in the base frame and at least one pair of through slots are formed in a conductive shape is wound between the pair of through slots spaced apart from each other Contains a pattern.

Embodiments of the present invention implement the inductor function by using a conductive pattern electrically connected to the radiator patch for transmitting and receiving a wireless signal, it is possible to reduce the manufacturing cost of the antenna by eliminating a separate inductor element.

1 is a perspective view showing the inner surface of the base frame of the built-in antenna according to an embodiment of the present invention.
FIG. 2 is a perspective view illustrating an outer surface of the built-in antenna of FIG. 1. FIG.
FIG. 3 is an enlarged view of portion A of FIG. 1.
4 is an enlarged view of an embodiment of part B in a cross-sectional view taken along line II ′ of FIG. 2;
FIG. 5 is an enlarged view of another embodiment of part B in a cross-sectional view taken along line II ′ of FIG. 2;

Hereinafter, specific embodiments of the internal antenna of the present invention will be described with reference to the drawings. However, this is only an example and the present invention is not limited thereto.

In describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. The following terms are defined in consideration of the functions of the present invention, and may be changed according to the intention or custom of the user, the operator, and the like. Therefore, the definition should be based on the contents throughout this specification.

The technical spirit of the present invention is determined by the claims, and the following embodiments are merely means for efficiently explaining the technical spirit of the present invention to those skilled in the art.

Hereinafter, a built-in antenna according to embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a perspective view showing the inner surface of the base frame of the built-in antenna according to an embodiment of the present invention, Figure 2 is a perspective view showing the outer surface of the built-in antenna of Figure 1, Figure 3 is a portion A of FIG. It is an enlarged view.

Built-in antenna 100 includes a base frame 102, a through slot 104, a radiator patch 105, and a conductive pattern 106, as shown in FIGS. 1 and 2. .

The base frame 102 is a body in which the radiator patch 105 for transmitting and receiving radio signals is implemented, and is an injection molding.

At least one pair of through slots 104 are implemented in the base frame 102, and each of the through slots 104 is formed to penetrate the base frame 102 and be spaced apart from each other. The through slot 104 may be formed by an injection mold during injection molding of the base frame 102, or may be formed by post-processing using cutting tools such as drill, lathe and milling after injection molding. have.

The radiator patch 105 is implemented on the surface of the base frame 102. The radiator patch 105 may be implemented in a rectangular shape, as shown in FIGS. 1 and 2, but is not limited to FIGS. 1 and 2 and may be implemented in various shapes.

In addition, the conductive pattern 106 is electrically connected to the radiator patch 105. The conductive pattern 106 may be formed in the base frame 102 in various ways. For example, laser direct structuring (LDS) for processing a surface of the base frame 102 using a laser and implementing a conductive pattern may be used. When applying the LDS method, the base frame 102 may be applied to the LDS resin injection molding. In addition, the conductive pattern 106 is formed on the surface of the base frame 102. The plating seating ink is applied to the base frame 102 in the form of a radiator pattern, and after the plating seating ink is cured, a metal material is deposited thereon. By applying the plating liquid, an ink printing plating method for forming a conductive pattern, a method for applying a conductive paste to the base frame 102 to form a conductive pattern, and the like can also be used.

Meanwhile, referring to FIG. 3, a conductive pattern 106 is formed in a helical form between the pair of through slots 104. To this end, the conductive patterns 106 are formed on the outer and inner surfaces of the base frame 102, and the conductive patterns 106 are formed on the sidewalls of the through slots 104, respectively. And the conductive pattern 106 on the inner side are electrically connected through the sidewall of the through slot 104. As a result, the conductive pattern 106 is formed between the pair of through slots 104 in a shape of being wound.

As such, forming at least one pair of through slots 104 in the base frame 102 and using the through slots 104 to implement the conductive pattern 106 in the form of a spiral is an inductor with the conductive pattern 106. To implement the function. That is, since the conductive pattern 106 is formed in a shape wound around the base frame 102 through two through slots 104, the conductive pattern 106 performs an inductor function.

In the related art, a separate capacitor device or a separate inductor device may be added to adjust resonance characteristics or impedance matching of the radiator patch 105. However, in this case, as the size of the antenna increases, the manufacturing cost increases. In the present invention, since the inductor function is implemented by using the conductive pattern 106 electrically connected to the radiator patch 105, a separate inductor element is unnecessary, thereby reducing manufacturing costs.

On the other hand, in order to form the conductive pattern 106 on the sidewall of the through slot 104, a laser irradiation or a plating solution or conductive paste is applied. Accordingly, when the sidewall of the through slot 104 is perpendicular to the outer and inner surfaces of the base frame 102, the conductive pattern 106 may not be properly formed on the sidewall of the through slot 104. As a result, the conductive patterns 106 formed on the outer side and the inner side of the base frame 102 are electrically separated by the sidewalls of the through slots 104, and thus cannot perform the inductor function.

To avoid this problem, as shown in Fig. 3, the side wall of the through slot 104 is formed with an inclined surface so as to be exposed in the opening direction. Here, the side wall on which the conductive pattern 106 is formed should be formed as an inclined surface, but not all side walls of the through slot 104 need be exposed in the opening direction. For example, sidewalls in which the conductive pattern 106 is not formed among the sidewalls of the through slot 104 may be formed to be perpendicular to the inner side and the outer side of the base frame 102.

4 is an enlarged view of an embodiment of portion B in the cross-sectional view of FIG. 2 ′, and FIG. 5 is an enlarged view of another embodiment of a portion B of the cross-sectional view of FIG. to be.

First, referring to FIG. 4, the first conductive pattern 106a is formed on the outer surface of the base frame 102, and the second conductive pattern 106b is formed on the inner surface of the base frame 102 and the through slot 104. Is formed up to the side wall. Accordingly, the first conductive pattern 106a and the second conductive pattern 106b are electrically connected through the through slot 104. The side wall of the through slot 104 is formed as an inclined surface, it is formed in a shape that widens in the lower opening direction.

Meanwhile, referring to FIG. 5, the first conductive pattern 106a is formed to the outer side surface of the base frame 102 and some sidewalls of the through slot 104, and the second conductive pattern 106b is the base frame 102. The inner side of the through slot 104 and the other side portion of the side is formed. Accordingly, the first conductive pattern 106a and the second conductive pattern 106b are electrically connected through the through slot 104. The side wall of the through slot 104 is formed as an inclined surface, unlike the Figure 4 is formed in a shape that widens in the opening direction of each of the upper and lower parts.

Meanwhile, although only two pairs of through slots 102 are shown in the drawings, an additional through slot 104 is formed in the base frame 102 and a helical conductive pattern 106 is further implemented, if necessary. Inductance of the radiator patch 105 may be additionally secured.

4 and 5, the first conductive pattern 106a and the second conductive pattern 106b are divided for convenience of description. In the base frame 102, the first conductive pattern 106a and the second conductive pattern 106a are separated. The conductive pattern 106b is formed integrally.

In summary, the integrated antenna and the wireless communication device including the built-in antenna according to an embodiment of the present invention by forming at least one pair of through slots in the base frame, by implementing a conductive pattern in the form of a spiral between the through slots As a result, the conductive pattern has its own inductor function, thereby avoiding the use of a separate inductor element. Accordingly, the manufacturing cost of the antenna and the wireless communication device including the antenna can be reduced.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limiting the scope of the present invention. I will understand.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.

100: built-in antenna 102: base frame
104: through slot 105: radiator patch
106: conductive pattern

Claims

A base frame having at least one pair of through slots spaced apart from each other; And
A conductive pattern formed in a shape wound between the pair of through slots;
Including, a built-in antenna.

The built-in antenna of claim 1, wherein at least one of the sidewalls of the through slot is formed as an inclined surface.

The built-in antenna of claim 1, wherein the through slot is formed to have a shape widening in one opening direction.

The built-in antenna of claim 1, wherein the through slots are formed to have shapes that respectively widen in both opening directions.

The built-in antenna of claim 1, wherein the conductive pattern is formed on the base frame by an LDS method.

6. The embedded antenna of claim 5 wherein the base frame is an LDS resin injection molding.

A radio communication device comprising the built-in antenna according to any one of claims 1 to 6.