KR20080101945A - Mobile device having metal pattern for extending ground - Google Patents

Abstract

A mobile terminal including a metal pattern for the ground expansion for improving the electromagnetic absorption rate of the mobile terminal is provided to improve the electromagnetic absorption rate of the mobile terminal and improve the radiation performance of an antenna due to signally connecting between grounds. A first main body includes first ground. A second main body includes the second ground and contacts with the first main body. A metal pattern(100) is mounted on the outside the first main body, and is connected to the first ground. The metal pattern and the second ground are coupling together. The metal pattern is mounted on a contact surface of the first main body and the second main body.

Description

Mobile device having metal pattern for extending ground

1 is a perspective view of a metal pattern according to an embodiment of the present invention.

2 is a view showing that the metal pattern is mounted on the main body of the mobile terminal according to an embodiment of the present invention.

Figure 3 is an exploded perspective view showing an upper case and a lower case of the body portion according to an embodiment of the present invention.

Figure 4 is a perspective view showing the back of the upper case of the body portion is mounted with a metal pattern according to an embodiment of the present invention.

5 is an exploded perspective view of a portable terminal according to an embodiment of the present invention.

6 is a view showing the results of experiments in the TRP / TIS radiation performance of the conventional portable terminal.

FIG. 7 is a diagram illustrating a result of experiments on TRP / TIS radiation performance of a mobile terminal having a metal pattern mounted thereon and having an extended antenna ground; FIG.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable terminal, and more particularly, to a portable terminal in which a metal pattern is mounted on the outside of the main body of the portable terminal and coupled to the ground of the main body on which the mounted metal pattern is not mounted.

In general, a mobile terminal is an electronic device that allows a user to freely use functions such as wireless communication, network connection, and digital broadcast reception regardless of time and place. The portable terminal is essentially provided with an antenna in order to facilitate communication. An antenna refers to a conductor laid in the air to efficiently radiate radio waves into a space in order to achieve the purpose of communication in wireless communication, or to efficiently discharge electromotive force by radio waves.

In order to optimize the radiation pattern of the antenna, all antennas are theoretically designed assuming infinite ground. Based on these assumptions, ground conditions have a large impact on the radiation characteristics. In particular, the lower the frequency, the longer the wavelength, so sufficient ground must be secured. In the case of a Planar Inverted F Antenna (PIFA) antenna, which has recently been generalized, the ground is directly related to the radiation performance as a single radiation plate in addition to the role of showing a simple miller effect. For this reason, the portable terminal improves the radiation performance of the antenna by modifying the ground conditions of the antenna through various mechanical supplements.

In particular, in the case of the low frequency band, sufficient ground is required, but it is practically impossible to secure an antenna ground close to infinity in a typical mobile terminal. Moreover, in the case of the folding portable terminal, the ground of the folder portion and the ground of the main body portion are not challenged with each other, so it is difficult to secure sufficient ground.

In order to solve this problem, the conventional portable terminal extends the ground of the antenna by directly connecting the ground of the folder and the ground of the main body through the hinge of the folder. However, this method has a problem in that the hinge flows as the folder part is opened and closed, and thus the durability is weak and the design is complicated.

An object of the present invention is to extend the ground of the antenna by inducing a coupling between the metal pattern connected to the ground of the main body and the ground of the folder, without directly connecting the ground of the main body and the folder.

In order to achieve the above objects, the portable terminal according to the present invention includes a first body, a second body, a metal pattern. The first body and the second body are in contact with each other, and have a first ground and a second ground, respectively. The metal pattern is mounted outside the first body and is connected to the ground. The metal pattern and the second ground are coupled to each other.

In the mobile terminal according to the present invention, the metal pattern may be mounted on a portion where the first body and the second body contact each other. The first body on which the metal pattern is mounted may have a groove for mounting the metal pattern.

In the mobile terminal according to the present invention, the metal pattern may include at least one ground connection part. The ground connection part is inserted into the first body and connected to the first ground. In other embodiments, the ground connection may be connected to the first ground through a connecting metal plate. The material of a metal pattern can be copper. The shape of the metal pattern may be a plate shape.

The portable terminal according to the present invention may be a slide type portable terminal in which the first body and the second body are coupled to each other in a sliding manner.

The mobile terminal according to another embodiment of the present invention includes a folder portion, a main body portion, and a metal pattern. The folder portion has a ground. The main body includes a circuit board, a ground of the circuit board, and an antenna. The antenna is connected to the ground of the circuit board. The main body is connected to the folder at one end. The metal pattern is mounted on the outside of the main body and is connected to the ground of the circuit board. The metal pattern and the ground of the folder portion are coupled to each other.

In the portable terminal according to the present invention, the metal pattern may be mounted on a portion where the main body portion and the folder portion contact each other. The main body may have a groove for mounting a metal pattern in a portion in contact with the folder portion.

In the mobile terminal according to the present invention, the metal pattern may include ground connection portions at both ends. The ground connection part is inserted into the main body part and connected to the ground of the main body part.

A mobile terminal according to another embodiment of the present invention includes a folder portion, a main body portion, and a metal pattern. The folder portion has a ground. The main body includes a circuit board, a ground of the circuit board, and an antenna. The antenna is connected to the ground of the circuit board. The main body is connected to the folder at one end. The metal pattern is mounted on the outside of the folder portion and is connected to the round of the folder portion. The metal pattern and the ground of the circuit board of the main body are coupled to each other. In the portable terminal according to the present invention, the metal pattern can be mounted on a portion where the folder portion and the main body portion contact each other.

The mobile terminal according to another embodiment of the present invention includes a folder portion, a main body portion, a first metal pattern, and a second metal pattern. The folder portion has a ground. The main body includes a circuit board, a ground of the circuit board, and an antenna. The antenna is connected to the ground of the circuit board. The main body is connected to the folder at one end. The first metal pattern is mounted outside the folder portion and is connected to the ground of the folder portion. The second metal pattern is mounted outside the main body and connected to the ground of the circuit board. The first metal pattern and the second metal pattern are coupled to each other. The portable terminal according to the present invention may mount the first metal pattern and the second metal pattern on a portion where the main body portion and the folder portion contact each other.

Example

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings such that those skilled in the art may easily implement the present invention.

In describing the embodiments, descriptions of technical contents which are well known in the technical field to which the present invention belongs and are not directly related to the present invention will be omitted. This is to more clearly communicate without obscure the subject matter of the present invention by omitting unnecessary description.

For the same reason, in the accompanying drawings, some components are exaggerated, omitted or schematically illustrated. In addition, the size of each component does not fully reflect the actual size. The same or corresponding components in each drawing are given the same reference numerals.

1 is a perspective view of a metal pattern according to an embodiment of the present invention.

As shown in FIG. 1, the metal pattern 100 is in the shape of a metal plate. The shape of the metal pattern 100 may be variously modified according to the shape of the mobile terminal. The material of the metal pattern 100 is a metal such as copper or the like.

The metal pattern 100 includes ground connectors 110 at both ends. The ground connection unit 110 is inserted into the portable terminal and connected to the ground inside the portable terminal. The metal pattern 100 may be easily mounted on the portable terminal through the ground connector 110 and may be connected to the ground inside the portable terminal.

2 is a diagram illustrating a metal pattern mounted on a main body of a mobile terminal according to an exemplary embodiment of the present invention.

As shown in FIG. 2, the main body 200 includes a keypad 210 for inputting letters or numbers. The user may make a call or input text using the keypad 210. The main body 200 has a microphone 230 at the bottom. The main body 200 has a hinge groove 310 formed at an upper end thereof. The hinge formed in the folder portion is fitted into the hinge groove 310.

In the main body 200 of the mobile terminal, mounting grooves 220 for mounting the metal pattern 100 are formed in a portion in contact with the folder portion. The mounting groove 220 is provided with mounting holes 221 for inserting the ground connection portion 110 of the metal pattern 100 at both ends. The metal pattern 100 is mounted in the main body part 200 by inserting the ground connection part 110 into the mounting hole 221.

3 is an exploded perspective view illustrating an upper case and a lower case of a body part according to an exemplary embodiment of the present invention, and FIG. 4 is a perspective view illustrating a rear surface of the upper case of a body part mounted with a metal pattern according to an exemplary embodiment of the present invention.

As shown in FIG. 3, the main body portion includes an upper case 201 and a lower case 202. The keypad 210 is formed on the front surface of the upper case 201 and the microphone 230 is installed. In addition, a metal pattern 100 is mounted on an upper end of the upper case 201.

The lower case 202 is mounted with a circuit board 250, a ground (not shown) of the circuit board, an antenna, and the like. The circuit board 250 may be a printed circuit board (PCB) commonly used in a portable terminal. The antenna may have a form in which an antenna pattern 261 is formed on the carrier 260. One end of the antenna pattern 261 is connected to the ground of the circuit board.

As shown in FIG. 4, the metal pattern 100 is mounted to the main body through a ground connection 110 inserted into the upper case 201 of the main body. The ground connection part 110 inserted into the upper case 201 is folded in an inward direction (arrow direction) and is in contact with the connection metal plate 240. The connection metal plate 240 is connected to the ground of the circuit board when the upper case 201 and the lower case 202 are coupled to the main body. Therefore, the metal pattern 100 may be connected to the ground of the circuit board through the ground connection unit 110 and the connection metal plate 240.

5 is an exploded perspective view of a mobile terminal according to an embodiment of the present invention.

As shown in FIG. 5, the portable terminal includes a folder 400 and a main body 200. The folder unit 400 includes a display unit 420 on a surface which is in contact with the main body unit 200 when folded. The display unit 420 may be an LCD (Liquid Crystal Display) commonly used in a portable terminal. The display unit 420 displays information necessary for using the portable terminal so that the user can conveniently use the portable terminal. The folder unit 400 includes a speaker 530 at the top.

The folder part 400 includes a folder part ground 410 therein. The folder part ground 410 is formed in a shape surrounding the display unit 420 inside the folder part 400. The folder ground 410 is preferably mounted at a position where coupling with the metal pattern 100 is best. In another embodiment, the folder ground 410 may be formed to extend to the hinge 300 of the folder 400.

The folder unit 400 has a hinge 300 at the bottom. The hinge part 300 of the folder part 400 is fitted into the hinge groove 310 of the main body part 200 so that the folder part 400 and the main body part 200 are coupled to each other. The folder unit 400 may rotate by a predetermined angle with the hinge 300 as an axis.

The metal pattern 100 is mounted outside the main body 200. In the present embodiment, the metal pattern 300 is mounted at a portion where the main body 200 and the folder 400 contact each other, that is, a position where the metal pattern 300 contacts the hinge 300 when the folder 400 and the main body 200 are coupled to each other. do. When the metal pattern 100 is mounted at a position in contact with the folder part 400, the metal pattern 100 is not visible from the outside of the mobile terminal. Therefore, in consideration of the design aspect of the mobile terminal, it is preferable to mount the metal pattern 300 in such a position. In addition, even when the folder part 400 rotates, the metal pattern 100 is always located closest to the folder part ground 410.

The metal pattern 100 is not directly connected to the folder ground 410. However, the metal pattern 100 and the folder ground 410 are coupled to each other. Coupling refers to a phenomenon in which signals are transmitted between spaced metals. Therefore, the metal pattern 100 has the same effect as the signal connection with the folder ground 410. The metal pattern 100 is connected to the ground of the circuit board mounted on the main body 200, and the ground of the circuit board is connected to the antenna. Therefore, the ground of the antenna extends to the folder ground 410.

This extension of antenna ground improves the radiation performance of the antenna and improves the Specific Absorption Rate (SAR).

FIG. 6 is a diagram illustrating results of experiments on TRP / TIS radiation performance of a conventional mobile terminal, and FIG. 7 is a diagram illustrating results of experiments on TRP / TIS radiation performance of a mobile terminal in which the ground of the antenna is expanded by mounting a metal pattern. Drawing.

TRP and TIS are measures of antenna performance in free space. Specifically, TRP (Total Radiated Power) is a value measured by displaying a maximum power (Max power) transmitted from the wireless device in three dimensions. TRP is used as an indicator of the performance of a transmitter in a free space. Total Isotropic Sensitivity (TIS) is a value calculated by lowering the power of a base station to a value that does not cause a data transmission error, measuring the power value at that time in three dimensions, and substituting the measured value into a predetermined equation. TIS is used as an indicator of the receiver's performance in a free space.

This experiment was carried out using a 3D Compact Chamber. As shown in FIG. 6 and FIG. 7, it can be seen that the TIS value and the TRP value are both improved in the portable terminal in which the ground of the antenna is expanded by mounting the metal pattern compared to the conventional portable terminal. This means that the antenna radiation performance of the portable terminal of the present invention is improved compared to the conventional portable terminal.

In the present embodiment, a folding portable terminal has been described as an example. However, the present invention can be applied to not only a folding portable terminal but also a slide portable terminal. That is, the present invention can be applied to a mobile terminal having a structure that is divided into two or more movable portions, each portion having a ground, and each ground cannot be directly connected.

In the present embodiment, a case in which the metal pattern is mounted on the main body is described as an example, but in another embodiment, the metal pattern may be mounted on the folder and coupled to the ground of the main body. In another embodiment, a metal pattern may be mounted on each of the folder portion and the main body portion, and the metal patterns may be coupled to each other.

The portable terminal according to the embodiment of the present invention refers to a portable electronic device such as a mobile phone, a personal digital assistant (PDA), a notebook computer, a global post system (GPS) device, and the like.

As described above, the present specification and drawings have been described with respect to preferred embodiments of the present invention, although specific terms are used, it is only used in a general sense to easily explain the technical contents of the present invention and to help the understanding of the present invention. It is not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention can be carried out in addition to the embodiments disclosed herein.

According to the present invention, a metal pattern may be mounted on a main body portion or a folder portion of a portable terminal to induce coupling with ground that is not directly connected to the metal pattern. Therefore, even if there is no direct connection between the grounds can be connected to each other to achieve the effect of expanding the ground. When the ground is extended, the radiation performance of the antenna of the mobile terminal is improved. The expansion of the ground also improves the electromagnetic wave absorption rate of the portable terminal.

In addition, by mounting the metal pattern in a portion where the main body portion and the folder portion contact, the design of the portable terminal can be made beautiful, and the coupling effect between the metal pattern and the ground can be made constant regardless of whether the folder portion is moved or not.

Claims (16)

A first body having a first ground; A second main body in contact with the first main body and having a second ground; And And a metal pattern mounted outside the first body and connected to the first ground. And the metal pattern and the second ground are coupled to each other. The method of claim 1, And the metal pattern is mounted at a portion where the first body and the second body contact each other. The method of claim 1, The first main body has a groove for mounting the metal pattern. The method of claim 1, The metal pattern may include at least one ground connection part connected to the first ground. The method of claim 4, wherein And the ground connection part is connected to the first ground through a connecting metal plate. The method of claim 1, The metal pattern is a mobile terminal, characterized in that copper. The method of claim 1, The metal pattern is a mobile terminal, characterized in that the plate shape. The method of claim 1, And the first body and the second body are coupled to each other in a sliding manner. A folder unit having a ground; A main body having a circuit board, an antenna connected to the ground of the circuit board and the ground of the circuit board, and connected to the folder part at one end; And It is mounted to the outside of the main body portion, and a metal pattern connected to the ground of the circuit board; includes; And the metal pattern and the ground of the folder portion are coupled to each other. The method of claim 9, And the metal pattern is mounted at a portion where the main body portion and the folder portion contact each other. The method of claim 9, The main body unit is provided with a groove for mounting the metal pattern. The method of claim 9, The metal pattern includes a ground connection part connected to the ground of the body portion at least one end. A folder unit having a ground; A main body having a circuit board, an antenna connected to the ground of the circuit board and the ground of the circuit board, and connected to the folder part at one end; And It is mounted to the outside of the folder portion, the metal pattern connected to the ground of the folder portion; includes; And the metal pattern and the ground of the circuit board are coupled to each other. The method of claim 13, And the metal pattern is mounted at a portion where the folder portion and the main body portion contact each other. A folder unit having a ground; A first metal pattern mounted outside the folder and connected to the ground of the folder; A main body having a circuit board, an antenna connected to the ground of the circuit board and the ground of the circuit board, and connected to the folder part at one end; And And a second metal pattern mounted outside the main body and connected to the ground of the circuit board. And the first metal pattern and the second metal pattern are coupled to each other. The method of claim 15, The first metal pattern and the second metal pattern are respectively mounted to a portion where the main body portion and the folder portion contact.

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