KR101968632B1 - Antenna module - Google Patents

Abstract

The shielding sheet is opened in an area overlapping the slit formed on the rear cover of the portable terminal to expose the radiation pattern and the antenna sheet to be overlapped with the slit is configured as a dummy area to prevent interference with the main antenna of the portable terminal, To form a strong radiation field at the backside of the antenna module. The proposed antenna module includes a flexible substrate formed by spacing insertion holes and a reception hole, a first radiation pattern arranged along the outer periphery of the insertion hole on at least one of the front and rear surfaces of the flexible substrate, And a magnetic sheet disposed on a front surface and a rear surface of the flexible substrate through the shielding sheet and the insertion hole disposed on the front surface of the flexible substrate and overlapped with the second radiation pattern and overlapping the first radiation pattern, , And the dummy area is formed in the area where the flexible substrate overlaps with the slit formed on the rear cover of the portable terminal.

Description

Antenna module {ANTENNA MODULE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna module, and more particularly, to an antenna module built in a mobile terminal and performing electronic settlement and local communication.

With the development of technology, mobile terminals such as mobile phones, PDAs, PMPs, navigation devices, and laptops can be used for various applications such as DMB, wireless Internet, Function. Accordingly, the portable terminal has a plurality of antennas for wireless communication such as wireless Internet, Bluetooth, and the like.

In addition, in recent years, there has been a tendency to apply functions such as information exchange, settlement, ticket booking, and search between terminals using a short distance communication (i.e., NFC) to portable terminals. To this end, the portable terminal is equipped with an antenna module (i.e., an NFC antenna module) used in a short distance communication system. At this time, the NFC antenna module to be used is a non-contact type short-range wireless communication module that uses a frequency band of about 13.56 MHz as one of RFID tags, and transmits data between terminals at a distance of about 10 cm. In addition to billing, NFC is used extensively in supermarkets and general stores for transporting travel information for goods information and visitors, as well as traffic and access control locks.

In recent years, functions related to electronic payment using portable terminals, such as Apple Pay, Samsung Pay, etc., are required, so that an electronic payment antenna is mounted on a portable terminal. For example, since Samsung Pay performs electronic settlement using a magnetic security transmission method, an MST (Magnetic Secure Transmission) antenna is implemented in a mobile terminal supporting Samsung Pay.

On the other hand, as miniaturization and thinning required in the portable terminal market are required, the size and thickness of the portable terminal are reduced, and the mounting space of the internal parts is being reduced.

Various types of antenna modules have been developed to minimize the area and thickness to meet such market demands.

However, since the MST antenna module used for electronic settlement is formed by winding the coil, when the miniaturization and thinning are performed, a short of the coil occurs, an irregular winding due to the bending, a twist due to the thin material The defect rate in manufacturing the antenna module is increased and the performance of the antenna module is deteriorated.

In addition, as the portable terminal is miniaturized, there is a problem that a mounting space becomes insufficient when mounting a plurality of antennas at the same time. Accordingly, a monolithic antenna in which a short-distance communication antenna and an MST antenna are integrally formed is required in the market.

Korean Patent No. 10-0505847 entitled " Removable battery cover with loop antenna formed therein and non-contact type wireless payment mobile phone using same "

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a portable terminal which exposes a radiation pattern by opening a shielding sheet in a region overlapping with a slit formed on a rear cover, An antenna module for preventing interference with a main antenna of a mobile terminal and forming a strong radiation field on a rear surface of the mobile terminal.

According to an aspect of the present invention, there is provided an antenna module mounted on a portable terminal, the antenna module comprising: a flexible substrate formed by spacing insertion holes and receiving holes; A first radiation pattern disposed along the periphery of the hole, a second radiation pattern disposed along the periphery of the receiving hole at the front surface of the soft substrate, a shielding sheet disposed at the front surface of the soft substrate and overlapped with the second radiation pattern, And a magnetic sheet disposed on the front and rear surfaces of the flexible substrate and overlapping the first radiation pattern. The flexible substrate has a dummy area formed in a region overlapping the slit formed on the rear cover of the portable terminal. At this time, the shielding sheet may further open a region overlapping with the dummy region and a region overlapping with the second radiation pattern disposed between the dummy region and the receiving hole.

According to the present invention, since the antenna module has the radiation pattern for short-range communication and the radiation pattern for electronic settlement formed on the flexible printed circuit board and then combined with the magnetic sheet, the area for short- Able to know.

Further, it can be seen that the antenna module has a mounting space, simplifies the fabrication and mounting process, and can realize antenna performance equal to or higher than that of the conventional antenna module.

In addition, since the antenna module uses the flexible member to constitute the antenna, it is possible to prevent damage to the portable terminal when mounted, and to easily mount the portable terminal in a bent position.

In addition, the antenna module has advantages in that it can simplify the manufacturing process compared to a conventional antenna module in which coils are wound around a magnetic body by forming a radiation pattern for short-range communication and a radiation pattern for electronic settlement on a flexible printed circuit board .

That is, in the conventional antenna module manufacturing process in which the coil is wound, the antenna module can omit the coil winding process including coil winding, coil insertion, coil compression, soldering, cutting, UV bonding, UV curing, There is an effect that the manufacturing process can be simplified.

Further, since the antenna module has a radiation pattern for short-range communication and a radiation pattern for electronic settlement formed on a flexible printed circuit board, the antenna module is combined with the magnetic sheet so that the attachment of the insulating material for preventing short- It is possible to simplify and reduce costs.

Also, since the antenna module is formed in the magnetic sheet with a protruding region disposed adjacent to the slit formed on the back cover of the portable terminal, the amount of the magnetic field radiated to the outside of the portable terminal is increased to strongly form the radiation field, There is an effect that can be.

In addition, the antenna module has a magnetic sheet formed with a protruding region adjacent to the slit formed in the back cover of the portable terminal, so that a radiation field is formed on the front and rear surfaces of the portable terminal, have.

In addition, the antenna module has a step-compensating sheet disposed on the magnetic sheet, which can compensate the step between the magnetic sheet and the antenna sheet to form an antenna module having a predetermined thickness, thereby enabling the antenna module to be easily mounted on a portable terminal.

Further, the antenna module has the effect of improving the flatness of the surface of the antenna module by minimizing the occurrence of bubbles when the protective sheet is bonded by forming holes in the step difference compensating sheet.

In addition, the antenna module can prevent the occurrence of interference of the geomagnetism sensor by the antenna module and prevent the deterioration of the sensing performance of the geomagnetic sensor by disposing the step compensation sheet after removing a part of the magnetic sheet overlapping with the geomagnetic sensor of the portable terminal There is an effect.

In addition, the antenna module has a support member on the front surface thereof to support the circuit board of the portable terminal, so that it is possible to firmly support the circuit board while preventing deterioration of antenna performance.

In addition, when the vertical slit is formed in the portable terminal, the antenna module removes a part of the shielding sheet and forms a dummy area on the antenna sheet, thereby preventing the performance degradation of the main antenna and the antenna module of the portable terminal have.

1 and 2 are views illustrating a mobile terminal to which an antenna module according to an embodiment of the present invention is applied.
3 and 4 are views for explaining an antenna module according to an embodiment of the present invention.
FIGS. 5 and 6 are views for explaining the antenna sheet of FIG. 3;
7 is a view for explaining the shielding sheet of Fig. 3; Fig.
8 is a view for explaining the magnetic sheet of Fig. 3;
9 to 12 are views for explaining a modified example of the antenna module according to the embodiment of the present invention.
13 and 14 are views for explaining antenna characteristics of an antenna module according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings in order to facilitate a person skilled in the art to easily carry out the technical idea of the present invention. . In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 and 2, a slit 20 or a slit 20 for passing a magnetic field of a radiation pattern is formed in the rear cover 10 of the portable terminal to form a radiation field for electronic settlement and short- . At this time, a first slit 22 formed adjacent to one side of the rear cover 10, and a second slit 24 formed between the camera hole 12 and the other side may be formed. Here, the camera hole 12 refers to a hole in which at least one of cameras and illumination disposed on the rear surface of the portable terminal is disposed.

The antenna module 100 according to the embodiment of the present invention is mounted on the rear cover 10 of the portable terminal. At this time, one end of the antenna module 100 is spaced apart from the first slit 22 by a predetermined distance, and the other end of the antenna module 100 is partially overlapped with the second slit 24.

3 and 4, an antenna module 100 according to an embodiment of the present invention includes an antenna sheet 110, a shielding sheet 120, a magnetic sheet 130, a first level compensating sheet 140, A second-stage compensating sheet 150, a protective sheet 160, a third-stage compensating sheet 170, and an adhesive sheet 180. Hereinafter, the front surface means one side in the direction toward the inside of the portable terminal (i.e., the body direction) and the rear side means the other side in the direction toward the outside of the portable terminal (i.e., the direction of the rear cover 10) .

5 and 6, the antenna sheet 110 includes a flexible substrate 111 having a first radiation pattern 112 and a second radiation pattern 113 formed thereon. Here, the first radiation pattern 112 is a radiation pattern for electronic settlement (e.g., MST) and the second radiation pattern 113 is radiation pattern for short-range communication (e.g., NFC) Pattern as an example.

The flexible substrate 111 may be formed of a flexible material such as polyimide (PI), polyethylene phthalate (PET), thermoplastic polyurethane (TPU), or the like.

In the flexible substrate 111, the insertion hole 114 and the accommodation hole 115 are formed apart from each other. At this time, the insertion hole 114 may be formed in a slit shape having a long side and a short side, which is a hole through which the magnetic sheet 130 is inserted. The receiving hole 115 is formed in various shapes according to a portable terminal in which the antenna module 100 is mounted, which is a hole in which a hole (for example, a camera hole 12) formed in the rear cover 10 of the portable terminal is accommodated .

The first radiation pattern 112 is formed in a loop shape in which the outer periphery of the insertion hole 114 of the flexible substrate 111 is wound a plurality of times. At this time, the first radiation pattern 112 may be formed on at least one surface of the front surface and the rear surface of the flexible substrate 111.

At this time, the region where the first radiation pattern 112 is formed on the flexible substrate 111 is divided into the first region A1, the second region A1, and the second region A1 depending on the relative position with respect to the insertion hole 114, (A2), a third area (A3), and a fourth area (A4).

The first area A1 is disposed on the upper portion of the insertion hole 114 and is a region where the magnetic sheet 130 is superimposed on the rear surface. At this time, the first radiation pattern 112 is formed only on the front surface of the first area A1 that is not overlapped with the magnetic sheet 130.

The second area A2 is disposed under the insertion hole 114 and is a region where the magnetic sheet 130 is superposed on the front surface. At this time, in the second region A2, the first radiation pattern 112 is formed only on the rear surface that is not overlapped with the magnetic sheet 130.

The third area A3 and the fourth area A4 are areas opposed to each other on the side of the insertion hole 114 and not overlapping with the magnetic sheet 130. [ At this time, since the width (i.e., D) of the insertion hole 114 is maximized to increase the performance of the first radiation pattern 112 (i.e., performance for electronic settlement), the third area A3, 4 region A4 becomes relatively narrow. That is, the area in which the first radiation pattern 112 can be formed becomes narrow.

If the first radiation pattern 112 is formed in the third area A3 and the fourth area A4 with the same number of turns as the first area A1 and the second area A2, The line width is narrowed, the resistance is increased, and the antenna performance is degraded.

Accordingly, the first radiation pattern 112 is formed on the front surface and the rear surface of the third area A3 and the fourth area A4. At this time, the first radiation pattern 112 formed in the third area A3 and the fourth area A4 has a lower number of turns than the first radiation pattern 112 formed in the first area A1 and the second area A2. Is reduced to half, and line width is increased to minimize the increase in resistance.

The first radiation patterns 112 disposed on the front and rear surfaces of the flexible substrate 111 are connected to each other via the via holes to constitute a loop type electronic settlement antenna for winding the insertion holes 114.

The first radiation pattern 112 may be formed on the other surface opposite to the one surface on which the second radiation pattern 113 is formed. For example, when the first radiation pattern 112 is formed on the front surface of the flexible substrate 111, the second radiation pattern 113 is formed on the rear surface of the flexible substrate 111.

The first radiation pattern 112 is formed of a plurality of patterns respectively disposed on the front and rear surfaces of the flexible substrate 111, And the first radiation pattern 112 is formed by being connected to another pattern formed on a surface opposed to the via hole.

The second radiation pattern 113 is formed in a loop shape in which the outer periphery of the receiving hole 115 of the flexible substrate 111 is wound a plurality of times. At this time, the second radiation pattern 113 may be formed in a loop shape that winds the outer periphery of the receiving hole 115 from the front surface or the rear surface of the flexible substrate 111.

The second radiation pattern 113 may be formed in a plurality of patterns and may be formed in a loop shape in which the outer periphery of the receiving hole 115 is wound a plurality of times on the front surface and the rear surface of the flexible substrate 111. At this time, a plurality of patterns are spaced apart from the front and back surfaces of the flexible substrate 111, and each pattern is connected to another pattern formed on the surface opposed to the via hole to constitute the second radiation pattern 113 do.

The antenna sheet 110 may further include a terminal portion 116 connecting the first radiation pattern 112 and the second radiation pattern 113 to the main circuit board of the portable terminal. The terminal portion 116 includes a plurality of terminals 117 connected to both ends of the first radiation pattern 112 and both ends of the second radiation pattern 113 and extends from one side of the flexible substrate 111 .

Referring to FIG. 7, the shielding sheet 120 is bonded to the front surface of the antenna sheet 110. At this time, the shielding sheet 120 is adhered to the front surface of the antenna sheet 110 so that the radiation pattern of the antenna sheet 110 forms a radiation field in the rear direction of the portable terminal. The shielding sheet 120 is formed to cover an area where the second radiation pattern 113 of the antenna sheet 110 is formed and a hole corresponding to the receiving hole 115 of the antenna sheet 110 is formed therein.

The magnetic sheet 130 is an auxiliary radiation of the first radiation pattern 112 formed on the antenna sheet 110, and may be formed of a thin metal. At this time, the magnetic sheet 130 is formed of one selected from a metal material selected from a nano-crystal alloy, an iron-based amorphous alloy, and ferrite. Here, the nanocrystalline alloy is an Fe-based magnetic alloy, and the Fe-based magnetic alloy may be an Fe-Si-B-Cu-Nb alloy. In this case, it is preferable that Fe is 73-80 at%, the sum of Si and B is 15-26 at%, and the sum of Cu and Nb is 1-5 at%.

The magnetic sheet 130 is formed of a metal material in a soft state in which heat treatment is not performed. That is, when the magnetic sheet 130 is formed in a hard state by heat-treating the metal material, the magnetic sheet 130 is damaged in the process of mounting the antenna module 100 on the portable terminal, It is preferable that the magnetic sheet 130 is in a soft state in which heat treatment is not performed.

Referring to FIG. 8, the magnetic sheet 130 is formed in a rectangular shape and includes a base region 131 serving as a reference region of the magnetic sheet 130.

The base region 131 is formed with a recessed region 132 for preventing interference of the geomagnetic sensor. That is, when the magnetic sheet 130 is overlapped with the geomagnetic sensor mounted on the portable terminal, interference occurs in the geomagnetic sensor due to the magnetic permeability of the magnetic sheet 130, and the sensing accuracy of the geomagnetic sensor is lowered.

Accordingly, in the embodiment of the present invention, the recessed region 132 is formed in the base region 131 so as not to overlap the magnetic sheet 130 and the geomagnetic sensor. Here, the recessed region 132 refers to a region where the metal is removed by cutting a part of the base region 131.

The back cover 10 of the portable terminal is formed of a metal material so as to shield the magnetic field emitted from the radiation patterns (i.e., the first radiation pattern 112 and the second radiation pattern 113).

The antenna module 100 is configured such that the radiation patterns (i.e., the first radiation pattern 112 and the second radiation pattern 113) and the magnetic sheet 130 are disposed adjacent to the slit 20, The radiation field can be strongly formed.

However, since various substrates such as a main circuit board, a battery, a coupling or supporting structure are disposed in the portable terminal, it is difficult to dispose the magnetic sheet 130 adjacent to the slit 20.

Thus, in the embodiment of the present invention, a bottom protruding region 133 protruding outward from the one side of the base region 131 (i.e., in the direction of the first slit 22) is formed. The lower protruding region 133 is protruded from one side of the four sides of the base region 131 in the direction of the first slit 22. The lower protruding region 133 is spaced apart from the first slit 22 by a predetermined distance. At this time, the lower protruding region 133 is disposed as close as possible to the first slit 22.

The width of the lower protruding region 133 is narrower than the width of one side of the base region 131, and the protruding position can be changed in one side according to the base structure of the portable terminal.

The base region 131 is formed with an overlap region 134 passing through the insertion hole 114 of the antenna sheet 110 and overlapped with the first radiation pattern 112. At this time, the overlap region 134 is formed extending from the other surface of the base region 131 and disposed to face the lower projection region 133.

The overlap region 134 extends from the other side of the base region 131 and extends from the first overlap region 135 and the first overlap region 135 disposed on the rear surface of the antenna sheet 110, And a second overlap region 136 disposed on the front side.

The first overlapping region 135 is disposed on the rear surface of the antenna sheet 110 and overlaps with the first radiation pattern 112 formed on the lower portion of the insertion hole 114. The second overlapping region 136 is disposed on the front surface of the antenna sheet 110 through the insertion hole 114 and overlaps with the first radiation pattern 112 formed on the upper portion of the insertion hole 114.

The width of the second overlapping region 136 is less than the width of the insertion hole 114 and the width of the first overlapping region 135 is reduced as the second overlapping region 136 is closer to the second overlapping region 136.

For example, the first overlapping region 135 is formed in a trapezoidal shape longer than the upper side, the lower side is connected to the other side of the base region 131, and the upper side is connected to the second overlapping region 136. At this time, the upper side of the first overlapping region 135 is formed to have a length equal to or shorter than the width of the insertion hole 114.

The second overlapping region 136 is formed to extend from the upper side of the first overlapping region 135. The second overlapping region 136 is disposed on the front surface of the antenna sheet 110 after passing through the insertion hole 114 from the rear surface to the front surface of the antenna sheet 110.

The antenna sheet 110 and the magnetic sheet 130 are bonded to each other between the first overlapping area 135 and the rear surface of the antenna sheet 110 and between the second overlapping area 136 and the front surface of the antenna sheet 110 (Not shown) may be interposed therebetween.

An upper protruding region 137 may be formed in the second overlap region 136 to improve antenna performance of the first radiation pattern 112.

An upper protruding region 137 is formed extending from the second overlapping region 136. [ At this time, the upper projecting region 137 is formed extending in the direction opposite to the first overlapping region 135. At this time, the upper protruding region 137 is disposed as close as possible to the first slit 22. The width of the upper projecting region 137 is formed to be narrower than the width of one side of the second overlapping region 136 connected thereto.

The upper protruding region 137 overlaps with the second radiation pattern 113 and a part of the shielding sheet 120 and is spaced apart from the second slit 24 of the portable terminal by a predetermined distance. The antenna module 100 according to the embodiment of the present invention is configured such that the upper protruding region 137 of the magnetic sheet 130 is overlapped with the shielding sheet 120, The sheet 120 may partially operate as an auxiliary radiator of the first radiation pattern 112 to improve the antenna performance of the first radiation pattern 112. [

Here, the base region 131, the lower protruding region 133, the overlap region 134 (i.e., the first overlap region 135 and the second overlap region 136), and the second overlap region 134 The upper protruding region 137 and the second overlapping region 137 are formed on the base region 131, the lower protruding region 133 and the overlapping region 134 (i.e., the first overlapping region 135 and the second overlapping region 137) Region 136) and the upper projecting region 137 may be integrally formed.

The first level compensating sheet 140 compensates the level difference between the antenna sheet 110 and the magnetic sheet 130. That is, the first level compensating sheet 140 may be formed of a magnetic sheet (not shown) so as to compensate a level difference generated between the antenna sheet 110 and the magnetic sheet 130 as the magnetic sheet 130 is inserted through the antenna sheet 110 130).

The first level compensating sheet 140 is formed to have a thickness corresponding to the thickness of the antenna sheet 110. The thickness of the first step compensation sheet 140 may be the same as the thickness of the radiation pattern of the flexible substrate 111 of the antenna sheet 110.

The first level compensating sheet 140 is disposed in the base region 131 of the magnetic sheet 130. At this time, the first level difference compensating sheet 140 is disposed in a part of the base region 131 and is biased toward the overlapping region 134.

This is to compensate for the level difference caused by a sticker (for example, a sticker for battery specifications) attached to the battery of the portable terminal. That is, the first-stage compensating sheet 140 is formed in an area except the area overlapping with the sticker attached to the battery, which is disposed in the base area 131 of the magnetic sheet 130. [

The first level compensating sheet 140 is formed with a plurality of spaced apart air receiving holes 142. The air receiving hole 142 receives the air introduced between the magnetic sheet 130 and the protective sheet 160 during the process of attaching the protective sheet 160 to prevent bubbles from being generated in the protective sheet 160. That is, the air receiving hole 142 serves to prevent bubbles of the protective sheet 160 and to flatten the surface of the protective sheet 160.

The first level compensation sheet 140 is one example selected from the group consisting of PEN (polyethylene naphthalate) film, PET (polyethylene terephthalate) film, PI (polyimide) film, PC (polycarbonate) film and PSS .

The second level compensating sheet 150 is disposed in the concave region 132 of the magnetic sheet 130. The second level compensating sheet 150 is formed in the same shape as the cut area of the magnetic sheet 130 for forming the concave area 132 for preventing interference between the geomagnetic sensor and the magnetic sheet 130, 132). At this time, the second step difference compensating sheet 150 may be formed in various shapes such as a rectangle corresponding to the shape of the concave region 132, a fan shape, or the like.

The second level compensation sheet 150 is one example selected from a PEN (polyethylene naphthalate) film, a PET (polyethylene terephthalate) film, a PI (polyimide) film, a PC (Polycarbonate) film and a PSS .

The protective sheet 160 is bonded to the front surface of the antenna sheet 110 and the magnetic sheet 130 to prevent the radiation pattern formed on the antenna sheet 110 and the magnetic sheet 130 from being damaged.

The antenna module 100 may cause a collision with an internal structure (e.g., a battery) of the portable terminal if an impact is applied to the portable terminal. When the antenna module 100 collides with the internal structure, the magnetic sheet 130 is damaged or the characteristics of the magnetic sheet 130 are changed, thereby affecting antenna performance.

Thus, in the embodiment of the present invention, the dummy area is formed on one side of the antenna sheet 110 and on one side of the magnetic sheet 130. At this time, the dummy area may include a first dummy area 118 formed on the antenna sheet 110 and a second dummy area 138 formed on the magnetic sheet 130. Here, the first dummy region 118 is a region formed on one side of the antenna sheet 110, and means a region where no radiation pattern is formed in the entire region of the flexible substrate 111. The second dummy area 138 is a region formed on one side of the magnetic sheet 130 and is formed by removing a part of one side of the magnetic substrate.

The third stage compensating sheet 170 is disposed on one side of the magnetic sheet 130 and disposed on the second dummy area 138. That is, the magnetic sheet 130 is absorbed by the impact upon collision between the internal structure of the portable terminal and the internal structure of the portable terminal 130, thereby preventing the magnetic sheet 130 from being damaged and changing its characteristics.

The third step compensation sheet 170 is one selected from the group consisting of PEN (polyethylene naphthalate) film, PET (polyethylene terephthalate) film, PI (polyimide) film, PC (polycarbonate) film and PSS .

The adhesive sheet 180 is attached to the back surface of the antenna sheet 110 and the magnetic sheet 130 in a configuration for attaching the antenna module 100 to the rear housing of the portable terminal. At this time, the front surface of the adhesive sheet 180 is bonded to the back surface of the antenna sheet 110 and the magnetic sheet 130. A release film, which is removed before the process of attaching the antenna module 100 to the portable terminal, is attached to the back surface of the adhesive sheet 180. Here, the adhesive sheet 180 may include a first adhesive sheet 180 attached to the antenna sheet 110 and a second adhesive sheet 180 adhered to the magnetic sheet 130.

The portable terminal has a structure (for example, a support projection for connecting the battery and the main circuit board) for supporting the circuit board. As the size (area) of the antenna module 100 increases, The antenna module 100 may be disposed.

In this case, the antenna module 100 may have a hole through which the structure passes. However, when the hole is formed, the area where the radiation pattern can be formed may be narrowed, or a loop-shaped radiation pattern may not be realized. The antenna performance can not be realized.

9, the antenna module 100 according to the embodiment of the present invention may further include a support member 190 for supporting a circuit board. That is, instead of forming the holes in the antenna module 100, the supporting member 190 protruding in the front surface (i.e., in the direction of the circuit board) is disposed.

Accordingly, the antenna module 100 can firmly support the circuit board while maintaining antenna performance.

10, the lowermost portion S of the second slit 24 is disposed closer to the antenna sheet 110 than the uppermost portion L of the display 30. Accordingly, the radiation field formed on the rear surface of the portable terminal is weaker than the radiation field formed on the front surface. That is, the magnetic field emitted from the second radiation pattern 113 first passes through the non-metal area of the front surface before passing through the second slit 24, so that the radiation field at the rear is weakened.

In addition, antenna performance may be degraded due to interference between the main antenna of the portable terminal and the radiation pattern of the antenna module 100.

11, a third slit 26 in the vertical direction connecting the second slit 24 and the camera hole 12 may be formed on the rear cover 10 of the portable terminal. That is, a third slit 26, which is disposed closer to the antenna sheet 110 than the uppermost portion L of the display 30, is formed on the rear cover 10 to reinforce the radiation field on the rear surface, 110).

12, the antenna sheet 110 may be disposed so that the second radiation pattern 113 does not overlap the area overlapping the second slit 24 in order to prevent interference with the main antenna . That is, the dummy space 119 in which the second radiation pattern 113 is not formed is disposed in the area of the antenna sheet 110 overlapping the second slit 24 of the flexible substrate 111. Here, the second radiation pattern 113 may be formed to have a narrow interval between the patterns to form the set number of turns.

The area of the shielding sheet 120 disposed in the direction of the second slit 24 can be removed. That is, the shielding sheet 120 is formed along the outer periphery of the receiving hole 115, and a part of the area adjacent to the second slit 24 is open.

Accordingly, when the vertical slit 20 is formed in the portable terminal, the antenna module 100 removes a part of the shielding sheet 120 and forms a dummy area in the antenna sheet 110, And the performance degradation of the antenna module 100 can be prevented.

The antenna module 100 can maximize the recognition rate for electronic settlement and local communication in the front face (i.e., the direction of the display module) and the rear face (i.e., the face of the back cover 12) . This will be described below with reference to the accompanying drawings.

13 shows a result of measuring the electronic settlement performance (i.e., the recognition rate and recognition range of the first radiation pattern 112) of the antenna module 100 according to the embodiment of the present invention.

In the antenna module 100 according to the embodiment of the present invention, when the back cover 10 having the slit 20 formed therein is applied, the recognition rate and recognition range in the electronic settlement satisfies the reference performance.

At this time, the antenna module 100 (i.e., the antenna module 100 shown in Fig. 2) applied to the rear cover 10 on which the third slit 26 is not formed is mounted on the rear surface (i.e., in the direction of the rear cover 10) Have a higher recognition rate and recognition range in the front side (i.e., the display direction).

This is because the second slit 24 of the rear cover 10 is disposed at a higher position than the non-metal region on the front surface of the portable terminal, and a stronger radiation field is formed on the front surface of the portable terminal.

On the other hand, the antenna module 100 (i.e., the antenna module 100 shown in FIG. 12) applied to the rear cover 10 having the third slits 26 has a higher recognition rate and recognition range at the rear than the front face.

This is because the third slit 26 of the rear cover 10 is disposed at a lower position than the non-metal region on the front surface of the portable terminal, and a stronger radiation field is formed on the rear surface of the portable terminal.

FIG. 14 shows a result of measuring the short range communication performance (that is, the recognition distance and the load modulation by the second radiation pattern 113) of the antenna module 100 according to the embodiment of the present invention.

The antenna module 100 according to the embodiment of the present invention can recognize that the recognition distance and the load modulation satisfy the reference performance in the short distance communication when the rear cover 10 with the slit 20 is applied.

Since the magnetic field generated in the second radiation pattern 113 passes through the third slit 26 to form the radiation field, the radiation field passes through the second slit 24, The loss due to the cover 10 is minimized.

This allows the seating distance and the load modulation performance of the antenna module 100 (i.e., the antenna module 100 shown in Fig. 12) applied to the rear cover 10 having the third slit 26 formed therein to reach the third slit 26, 2 is improved by about two times as compared with the antenna module 100 (i.e., the antenna module 100 shown in Fig. 2) applied to the rear cover 10 having no antenna.

In the case of the antenna module 100 (i.e., the antenna module 100 shown in Fig. 12) applied to the rear cover 10 having the third slit 26 formed therein, the recognition rate in the short distance communication is about 57.52% It satisfies the required recognition rate condition (55% or more).

Particularly, in the case of the antenna module 100 (i.e., the antenna module 100 shown in Fig. 2) applied to the rear cover 10 in which the third slit 26 is not formed, the recognition rate in the short distance communication is about 71.24% The recognition rate is increased by about 16% as compared with the condition, and the local communication performance is improved.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but many variations and modifications may be made without departing from the scope of the present invention. It will be understood that the invention may be practiced.

10: Rear cover 12: Camera hole
20: slit 22: first slit
24: second slit 26: third slit
100: Antenna module 110: Antenna sheet
111: soft substrate 112: first radiation pattern
113: second radiation pattern 114: insertion hole
115: receiving hole 116: terminal portion
117: terminal 118: first dummy area
119: Dummy space 120: Shielding sheet
130: magnetic sheet 131: base region
132: concave region 133: lower protrusion region
134: overlap area 135: first overlap area
136: second overlap region 137: upper protruding region
138: second dummy area 140: first-stage compensating sheet
142: air receiving hole 150: second stage compensating sheet
160: protective sheet 170: third-stage compensation sheet
180: Adhesive sheet 190: Support member

Claims (10)

1. An antenna module mounted on a portable terminal,
A soft substrate spaced apart from the insertion hole and the receiving hole;
A first radiation pattern disposed along the periphery of the insertion hole on at least one of a front surface and a rear surface of the flexible substrate;
A second radiation pattern disposed along the periphery of the receiving hole at the front surface of the flexible substrate;
A shielding sheet disposed on the front surface of the flexible substrate and overlapped with the second radiation pattern; And
And a magnetic sheet disposed on the front and rear surfaces of the flexible substrate through the insertion hole, the magnetic sheet overlapping with the first radiation pattern,
Wherein the soft substrate has a dummy area formed in an area overlapping a slit formed in a rear cover of the portable terminal. The method according to claim 1,
And the shielding sheet has an area overlapping with the dummy area. 3. The method of claim 2,
Wherein the shielding sheet further has a region overlapping with a second radiation pattern disposed between the dummy region and the receiving hole. The method according to claim 1,
And the second radiation pattern disposed in the direction of the dummy area on an outer periphery of the receiving hole is spaced apart from the dummy area. The method according to claim 1,
And second radiation patterns arranged in the direction of the dummy area on the outer periphery of the receiving hole are disposed between the dummy area and the receiving hole. The method according to claim 1,
Wherein an interval between the patterns of the second radiation pattern disposed between the receiving hole and the dummy area is narrower than a distance between the patterns of the second radiation pattern disposed in the other area. The method according to claim 1,
Wherein a part of the first radiation pattern is disposed on a rear surface of the soft substrate and overlapped with an area disposed on a front surface of the soft substrate of the magnetic sheet. 8. The method of claim 7,
Wherein another portion of the first radiation pattern is disposed on a front surface of the flexible substrate and overlaps with an area disposed on a rear surface of the soft substrate of the magnetic sheet. The method according to claim 1,
And a terminal portion extending from the flexible substrate and having a plurality of terminals,
And the plurality of terminals are respectively connected to both ends of the first radiation pattern and both ends of the second radiation pattern. The method according to claim 1,
Wherein the first radiation pattern is a radiation pattern for electronic settlement, and the second radiation pattern is a radiation pattern for short-range communication.

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