KR20190098669A - Antenna module and electronic device having the same - Google Patents

Abstract

According to an embodiment of the present invention, provided is an antenna module, which comprises: an insulation board; a first spiral wire disposed on a first surface of the insulation board and composed of a plurality of coil strands spaced apart from each other; a second spiral wire disposed on a second surface of the insulation board and composed of a plurality of coil strands disposed on a second surface of the insulating substrate and spaced apart from each other; and interlayer connection conductors disposed in the insulation substrate to electrically connect the first spiral wire and the second spiral wire. The coil strands of the first spiral wire are connected with the coil strands of the second spiral wire in reverse order along the radial direction.

Description

ANTENNA MODULE AND ELECTRONIC DEVICE HAVING THE SAME

The present invention relates to an antenna module and an electronic device having the same.

In recent years, portable terminals have added functions such as a system for wirelessly transmitting power to charge a battery, a radio tag (RFID), a near field communication (NFC), and a magnetic secure transmission (MST).

In addition, these functions are generally performed through a coil-shaped antenna, and a plurality of antennas are mounted in the portable terminal.

As the plurality of coils are mounted in the thin portable terminal, an antenna module capable of providing high efficiency while minimizing size is required.

Korean Laid-Open Patent No. 2017-0022421

An object of the present invention is to provide an antenna module provided in the portable terminal and an electronic device having the same.

Another object of the present invention is to provide an antenna module capable of providing high efficiency.

An antenna module according to an exemplary embodiment of the present invention may include an insulating substrate, a first spiral wire including a plurality of coil strands disposed on a first surface of the insulating substrate and spaced apart from each other, and disposed on a second surface of the insulating substrate. And a second spiral wire formed of a plurality of coil strands spaced apart from each other, and interlayer connection conductors disposed in the insulating substrate to electrically connect the first spiral wire and the second spiral wire. The coil strands of the first helical wire are connected to the coil strands of the second helical wire in the reverse order along the radial direction.

Since the antenna module according to the embodiment of the present invention constitutes a communication wiring by a plurality of strands instead of one wire, an area in which current does not flow can be reduced, and as the current flows toward one side of the wiring, The increase in resistance can be suppressed.

In addition, the divided coil strands are not electrically connected in the spiral wires, but are electrically connected to each other on the lead wires extending from the spiral wires. Therefore, when the antenna module according to the present embodiment is used for wireless charging, the charging efficiency may be increased as compared with the conventional art.

1 is a perspective view schematically showing an electronic device according to an embodiment of the present invention;
2 is a cross-sectional view taken along line II ′ of FIG. 1.
3 is a plan view schematically showing a first surface of an antenna module according to an embodiment of the present invention;
4 is a plan view schematically showing a second surface of the antenna module shown in FIG.
5 is a plan view schematically showing a first surface of an antenna module according to another embodiment of the present invention;
6 is a plan view schematically illustrating a second surface of the antenna module illustrated in FIG. 5.
7 is a plan view schematically showing a first surface of an antenna module according to another embodiment of the present invention;
8 is a plan view schematically illustrating a second surface of the antenna module shown in FIG. 7;
9 is a plan view schematically showing a first surface of an antenna module according to another embodiment of the present invention;
10 is a plan view schematically illustrating a second surface of the antenna module shown in FIG. 9;
11 is a plan view schematically showing a first surface of an antenna module according to another embodiment of the present invention.
12 is a plan view schematically illustrating a second surface of the antenna module illustrated in FIG. 9.
FIG. 13 is an enlarged view of portions A and B of FIGS. 11 and 12 enlarged.
14 is a graph showing a simulation of current density in a spiral wire;

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, embodiments of the present invention may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below. In addition, the embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art. In addition, the shape and size of the elements in the drawings may be exaggerated for clarity.

The electronic device described in this embodiment includes a mobile phone (or smart phone). However, the present invention is not limited thereto and may include any portable electronic device capable of carrying a wireless communication such as a notebook, a tablet PC, a wearable device, and the like.

1 is a perspective view schematically illustrating an electronic device according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line II ′ of FIG. 1.

1 and 2, the electronic device according to the present embodiment may be a wireless charging device, and may be a charging device 20 that wirelessly transmits power or a portable terminal 10 that wirelessly receives and stores power. have.

The portable terminal 10 includes a terminal body 15, a cover 11, a battery 12, and an antenna module 100.

The cover 11 is a rear cover coupled to the terminal body 15 to complete the portable terminal 10, and may be a battery cover separated from the terminal body 15 when the battery is replaced. However, the present invention is not limited thereto and may include an integrated cover that is difficult to separate from the terminal body 15.

The battery 12 may be a secondary battery capable of charging and discharging, and may be configured to be detachable from the portable terminal 10, but is not limited thereto.

The antenna module 100 is disposed between the terminal body 15 and the cover 11, and receives the power transmitted from the charging device 20 and supplies the battery 12 to the battery 12 to charge the battery 12. Therefore, the antenna module 100 may be directly attached to the inner surface of the cover 30 or disposed as close as possible.

The charging device 20 is provided to charge the battery 12 of the portable terminal 10. To this end, the charging device 20 may include a voltage converter 22 and a power transmitter 200 in the case 21.

The voltage converter 22 converts the home AC power supplied from the outside into a DC power source, converts the DC power into an AC voltage of a specific frequency, and provides the same to the power transmitter 200.

When the AC voltage is applied to the power transmitter 200, the magnetic field around the power transmitter 200 is changed. Accordingly, a voltage is applied to the wiring unit 110 of the portable terminal 10 disposed adjacent to the power transmission apparatus 200 according to the change of the magnetic field, thereby charging the battery 12.

The power transmission apparatus 200 may be configured similarly to the antenna module 100 described above. Therefore, detailed description of the power transmission apparatus 200 will be omitted.

Hereinafter, the antenna module 100 will be described in detail.

3 is a plan view schematically showing a first surface of an antenna module according to an embodiment of the present invention, Figure 4 is a plan view schematically showing a second surface of the antenna module shown in FIG.

3 and 4, the antenna module 100 according to the present exemplary embodiment includes a wiring unit 110 and a magnetic unit 102.

The magnetic part 102 has a flat plate shape (or sheet shape) and is disposed on one surface of the wiring part 110 to be coupled to the wiring part 110. The magnetic part 102 is provided to efficiently form the magnetic path of the magnetic field generated by the communication wiring 130 of the wiring part 110. To this end, the magnetic part 102 is formed of a material which can be easily formed, and for example, a ferrite sheet may be used.

On the other hand, although not shown, it is also possible to further add a metal sheet between the magnetic portion 102 and the battery 12 as necessary to attenuate electromagnetic waves or leakage magnetic flux. The metal sheet may be made of aluminum, but is not limited thereto.

In addition, in the antenna module 100 according to the present exemplary embodiment, an adhesive part 104 is provided between the wiring part 110 and the magnetic part 102 so that the wiring part 110 and the magnetic part 102 are firmly fixed to each other. May be interposed.

The adhesive part 104 is disposed between the wiring part 110 and the magnetic part 102 to bond the magnetic part 102 and the wiring part 110 to each other. The adhesive part 104 may be formed of an adhesive sheet or an adhesive tape, or may be formed by applying an adhesive or an adhesive resin to the surface of the wiring part 110 or the magnetic part 102.

In addition, the adhesive part 104 may be configured to contain ferrite powder so that the adhesive part 104 may be configured to have magnetism together with the magnetic part 102.

When the magnetic part 102 is coupled to the wiring part 110, the magnetic part 102 is disposed to face the spiral wires 131a and 131b of the wiring part 110. The lead wires 132a and 132b are disposed to partially face each other, but not to face the connection parts 133a and 133b described below.

The wiring unit 110 is configured in the form of a substrate. More specifically, the wiring unit 110 may include an insulating substrate 111 and communication wirings 130 formed on both surfaces of the insulating substrate 111.

The insulating substrate 111 is a substrate capable of forming circuit wiring on one surface or both surfaces. For example, an insulating film (for example, a polyimide film) may be used. In this case, the wiring unit 110 may be configured in the form of a flexible PCB. However, the present invention is not limited thereto, and various types of substrates (eg, printed circuit boards, ceramic substrates, glass substrates, epoxy substrates, flexible substrates, etc.) well known in the art may be selectively provided that circuit wirings may be formed on both surfaces. Can be used.

The communication wiring 130 is disposed on both sides of the insulating substrate 111.

The communication wiring 130 is formed using both surfaces of the insulating substrate 111 and may be configured in the form of circuit wiring formed of copper foil or the like.

The communication wiring 130 according to the present exemplary embodiment may be manufactured by patterning double-sided copper clad laminates (CCLs). In addition, the film may be formed on both sides of a flexible insulating substrate such as a film through photolithography, and may be manufactured, for example, with a double-sided structure of a flexible PCB (FPCB).

Accordingly, the wiring part 110 of the present embodiment may be formed to be very thin. However, if necessary, it is also possible to manufacture a multilayer substrate or a rigid printed circuit board (PCB).

The communication wire 130 according to the present embodiment is formed of a thin metal layer, and the spiral wires 131a and 131b, the lead wires 132a and 132b, the connection parts 133a and 133b, and the connection pad 134 are formed in a coil shape. It includes.

The connection pad 134 has a function of a contact point in which the communication wire 130 is electrically connected to other components. Therefore, the connection pad 134 is connected to both ends of the spiral wires 131a and 131b through the lead wires 132a and 132b and is exposed to the outside so as to be in physical contact with the external components.

The spiral wires 131a and 131b are disposed to face each other on both sides of the insulating substrate 111, and thus the first spiral wiring 131a and the insulating substrate 111 formed on the first surface of the insulating substrate 111 are formed. It is divided into a second spiral wiring 131b formed on the second surface of the. In addition, the entire line width (or outer diameter) of the first spiral wiring 131a may be configured to be the same as the entire line width (or outer diameter) of the second spiral wiring 131b.

In this embodiment, the first spiral wire 131a and the second spiral wire 131b have spirals formed in the same direction. Therefore, as shown in FIG. 3, when the wiring unit 110 is viewed from the front, the first spiral wire 131a and the second spiral wire 131b are formed so that spirals are formed in the same direction (eg, clockwise direction). It is composed.

When a current flows through the wiring unit 110, current flows in the same direction in the first spiral wiring 131a and the second spiral wiring 131b, and thus, the magnetic field and the first field generated in the first spiral wiring 131a are generated. Since the magnetic fields generated in the two spiral wires 131b are reinforced with each other, power reception efficiency can be improved.

The first helical wire 131a and the second helical wire 131b are connected in a series structure through an interlayer connection conductor 137 at a central portion.

The interlayer connecting conductors 137 are disposed in the insulating substrate 111 to penetrate the insulating substrate 111, and electrically connect the first spiral wiring 131a and the second spiral wiring 131b.

In this embodiment, a plurality of interlayer connecting conductors 137 are arranged in a line. However, the present invention is not limited thereto and may be modified in various forms as long as the first spiral wire 131a and the second spiral wire 131b can be connected to each other.

The interlayer conductor 137 may be formed by forming a through hole in the insulating substrate 111 and then filling a conductive material in the through hole, but is not limited thereto.

The lead wires 132a and 132b refer to wires connecting the outer end portions of the spiral wires 131a and 131b to the connection pads 134. Accordingly, the lead wires 132a and 132b are disposed on the first surface of the insulating substrate 111 to connect the end portions of the first spiral wires 131a and the first connection pads 134a, and The second lead wire 131b may include a second lead wire 132b connecting the end portion of the second spiral wire 131a to the second connection pad 134b.

The first spiral wire 131a and the second spiral wire 131b are electrically connected to each other through an interlayer connecting conductor 137 at a central portion. Therefore, the lead wirings 132a and 132b extend from the ends provided outside the first spiral wiring 131a and the second spiral wiring 131b.

Accordingly, the communication wiring 130 of the present embodiment sequentially moves from the first connection pad 134a to the first lead wiring 132a, the first spiral wiring 131a, the interlayer connection conductor 137, and the second spiral wiring. 131b, the second lead wires 132b, and the second connection pads 134b are connected to complete one coil wire.

Although not shown, an insulating protective layer may be formed on the communication wire 130. The insulating protective layer protects the communication wiring 130 from the outside and is provided to secure insulation from the outside. On the other hand, the connection pad 134 is in contact with an external component and electrically connected to the external component requirements. Therefore, the insulating protective layer 140 is partially removed on the connection pad 134, and at least a part of the connection pad 134 is exposed to the outside.

The communication wire 130 may be formed to protrude from the insulating substrate 111. However, the present invention is not limited thereto, and various modifications may be made, such as at least a portion of the communication wiring 130 embedded in the insulating substrate 111.

The first helical wire 131a and the second helical wire 131b are formed in an annular (or annular) outline. Therefore, in the center of the first spiral wire 131a and the second spiral wire 131b, an area (hereinafter, a center area) in which the communication wire 130 is not formed is provided. Hereinafter, the center area means an inner area of the spiral wire in which the communication wire 130 is not formed.

On the other hand, when a current flows in the conductor, the current does not flow through the entire cross-sectional area of the conductor, but flows along some surface of the cross-sectional area, which is called a 'skin effect'. The skin effect is a phenomenon in which a current flows only near the surface of a conductor when a high frequency current is applied to a conductor such as a metal. The skin effect occurs because the direction of the current flowing along the conductor changes rapidly, so that back electromotive force is generated inside the conductor, making it difficult for the current to flow in the center of the conductor.

In addition, the proximity effect causes a phenomenon in which the current does not flow uniformly in the conductor and the current flows to one side of the conductor.

Fig. 14 is a graph showing a simulation of current density in a spiral wiring, where (a) shows a current density in a single wiring, and (b) shows a current density in a divided wiring.

Here, the X axis represents the radius of the helical wiring. Therefore, it means the wiring arrange | positioned toward the outer diameter side of a spiral wiring toward the right side. In addition, the Y axis shows current density.

Referring to FIG. 14A, it can be seen that in each turn t1 to t11, the current density does not appear constant but is biased to one side.

In this general spiral wiring, the current flowing in each turn flows in the form of one side rather than flowing evenly along the surface of the wiring.

As a result, a region in which current does not flow is generated, thereby limiting the amount of current flowing through the conductor (eg, communication wiring) and increasing the resistance value, thereby ultimately lowering the power reception efficiency.

Therefore, in this embodiment, in order to suppress the power reception efficiency from being lowered due to the above factors, as shown in FIG. 14B, each turn t1 to t11 of the communication wiring 130 has a plurality of turns. The coil strands S1, S2, and S3 are divided. Structurally, the communication wire 130 of the present embodiment is formed in the form of a Litz wire.

In this case, it can be seen that the current density appears evenly as compared with FIG. 14A.

By dividing a single wire into several strands, it is possible to improve the skin effect and current draw. However, as the number of split coil strands increases, the spacing between the coil strands also increases, thereby increasing the DC resistance. Therefore, dividing the wiring into an excessively large number of coil strands may lower efficiency.

3 and 4, in this embodiment, the communication wiring 130 is composed of three coil strands S1, S2, and S3. However, the present invention is not limited thereto, and may be configured by two coil strands or four or more coil strands.

Meanwhile, in describing the present invention, for convenience of understanding, the coil strands of the first spiral wire 131a are denoted by S1, S2, and S3, and the coil strands of the second spiral wire 131b are P1, P2, P3 is indicated. However, since the coil strands S1, S2, S3 of the first spiral wire 131a are connected to the coil strands P1, P2, P3 of the second spiral wire 131b, the above-described description Unless the coil strands are separated, 'coil strands S1, S2, and S3' are the coil strands S1, S2 and S3 of the first spiral wire 131a and the second spiral wire 131b connected thereto. The coil strands of the P1, P2, P3 means the whole.

Each of the coil strands S1, S2, and S3 may be spaced apart from each other at equal intervals, and may have the same line width.

The three coil strands S1, S2, S3 are electrically connected to each other at one end of the lead wires 132a and 132b connected to the connection pad 134. Therefore, the first lead wire 132a and the second lead wire 132b include connecting portions 133a and 133b in which a plurality of coil strands are electrically connected to each other.

By the connecting portions 133a and 133b, the coil strands S1, S2, S3 are configured in parallel.

In the present exemplary embodiment, the connection parts 133a and 133b are disposed at a portion where the lead wires 132a and 132b are connected to the connection pad 134. However, the present invention is not limited thereto and may be provided at various positions as long as the lead wires 132a and 132b do not face the magnetic part 102.

When the connecting portions 133a and 133b are disposed at positions facing the magnetic portions 102 or in the spiral wirings 131a and 131b, the communication wiring 130 is divided into a plurality of coil strands S1, S2, and S3. Even if divided, the effect can be reduced.

 Accordingly, in the antenna module 100 according to the present embodiment, the connecting portions 133a and 133b are disposed outside the spiral wires 131a and 131b only, that is, on the lead wires 132a and 132b. In addition, it is disposed at a position not facing the magnetic portion 102. Therefore, the plurality of coil strands S1, S2, and S3 are not electrically connected to each other in the spiral wires 131a and 131b or in the region facing the magnetic portion 102.

On the other hand, when each coil strand (S1, S2, S3) is directly connected to the direct connection pad 134, each coil strand (S1, S2, S3) is electrically connected to each other by the connection pad 134. . In this case, the connecting parts 133a and 133b may be omitted.

The antenna module 100 according to the present embodiment configured as described above provides the communication wiring 130 divided into a plurality of strands. As such, when the communication wiring is composed of a plurality of coil strands S1, S2, and S3 instead of one wiring, an area in which current does not flow inside the conductor can be reduced, and current density is biased toward one side of the wiring. It can be suppressed.

In addition, the divided coil strands S1, S2, and S3 are not electrically connected in the spiral wires 131a and 131b, but are electrically connected to each other on the lead wires 132a and 132b extending from the spiral wires 131a and 131b. Connected.

Therefore, when the antenna module 100 according to the present embodiment is used for wireless charging, the charging efficiency may be increased as compared with the conventional art.

Meanwhile, the antenna module according to the present invention is not limited to the above-described embodiment, and various modifications are possible.

5 is a plan view schematically illustrating a first surface of an antenna module according to another embodiment of the present invention, and FIG. 6 is a plan view schematically illustrating a second surface of the antenna module illustrated in FIG. 5.

5 and 6, in the antenna module according to the present embodiment, at least some of the spiral wires 131a and 131b are connected in parallel.

In this embodiment, one turn (hereafter, the innermost turn) disposed at the center of the spiral wires 131a and 131b is connected in parallel. To this end, the antenna module according to the present embodiment includes a first interlayer connecting conductor 137a and a second interlayer connecting conductor 137b.

The first interlayer connecting conductor 137a connects the inner end of the first spiral wire 131a and the point where the innermost turn starts in the second spiral wire 131b. The second interlayer connecting conductor 137b connects an inner end of the second spiral wire 131b and a point where the innermost turn of the first spiral wire 131a starts.

Due to this configuration, the innermost turns of the first spiral wire 131a and the second spiral wire 131b are connected in parallel. Therefore, the communication wire 130 in which the first spiral wire 131a and the second spiral wire 131b are connected in series is connected in parallel only at the innermost turn of the first spiral wire 131a and the second spiral wire 131b. Connected.

In general, since the magnetic flux density is concentrated in the center region, the spiral coil is intensified in the current draw due to the proximity effect in the wiring (for example, the innermost turn) close to the center portion.

Thus, in this embodiment, the innermost turns are connected in parallel to provide more electrical path. As a result, the current flows into six coil strands in the innermost turn, thereby lowering the current density of each coil strand. This can minimize current dropping, which can increase power transmission efficiency.

On the other hand, although not shown, the communication wiring 130 of the present embodiment is configured to have a line width narrower than the line width of the other turns, since the innermost turn is configured in a parallel structure and includes twice as many coil strands as other turns. For example, the line width of the innermost turn may be narrowed to half of the line width of the other turns. In this case, the bias of the current to one side of the conductor can be further suppressed, and the inner diameters of the spiral wires 131a and 131b can be expanded.

7 is a plan view schematically illustrating a first surface of an antenna module according to another embodiment of the present invention, and FIG. 8 is a plan view schematically illustrating a second surface of the antenna module illustrated in FIG. 7.

Referring to FIGS. 7 and 8, the antenna module according to the present embodiment is configured similarly to the antenna module illustrated in FIGS. 5 and 6 and has one turn (hereinafter, referred to as the outermost one of the spiral wires 131a and 131b). , The outermost turn) is also connected in parallel.

In general, spiral coils are next to the center region, and in the outermost turn, current pull due to the proximity effect is large.

Thus, in this embodiment, the outermost turns are also connected in parallel to provide more electrical paths. Thus, as in the innermost turn, the current is distributed and flowed into the six coil strands in the outermost turn, so that the current density of each coil strand can be reduced.

In order to configure the outermost turn in a parallel structure, the communication wiring 130 of the present embodiment is the outermost turn of the first spiral wiring 131a by the third interlayer connecting conductor 137c and the fourth interlayer connecting conductor 137d. Both ends are connected to the second spiral wire 131b to form a parallel structure.

To this end, the second spiral wire 131b may separately include an extension wire 131b1 for forming the outermost turn in a parallel structure. The extension wiring 131b1 is not directly connected to the other second spiral wiring 131b and is only used to construct a parallel structure of the outermost turn of the first spiral wiring 131a.

As described above, when the outermost turns of the spiral wires 131a and 131b are configured in parallel, the number of coil strands S1, S2, and S3 increases so that the concentration of the current density in a specific region of the outermost turn can be suppressed. .

On the other hand, although not shown, the communication wiring 130 of the present embodiment includes more coil strands (for example, six strands) because the outermost turns are configured in parallel. Therefore, the line width can be configured to be narrower than the line width of other turns. For example, the line width of the innermost turn may be narrowed to half of the line width of the other turns. In this case, the bias of the current to one side of the conductor can be further suppressed, and the inner diameters of the spiral wires 131a and 131b can be expanded.

In addition, in the antenna module according to the present embodiment, the outer edges of the spiral wires 131a and 131b are formed in a square shape, and the inner side is formed in a circular shape. In this case, the line width may be increased in the corner portion of the rectangular shape. However, the configuration of the present invention is not limited thereto, and various modifications are possible, such as configuring the outer and inner contours in a rectangular shape, or in an elliptic shape or another polygonal shape.

9 is a plan view schematically illustrating a first surface of an antenna module according to another embodiment of the present invention, and FIG. 10 is a plan view schematically illustrating a second surface of the antenna module illustrated in FIG. 9.

9 and 10, in the antenna module according to the present exemplary embodiment, the arrangement order of the coil strands S1, S2, and S3 is changed in a process of crossing from the first spiral wire 131a to the second spiral wire 131b. Is changed. This will be described in more detail as follows.

As described above, each turn of the spiral wires 131a and 131b is composed of a plurality of coil strands S1, S2 and S3. Accordingly, as shown in FIG. 9, each turn of the first spiral wire 131a includes the first strand S1 disposed on the center region side, the third strand S3 disposed on the outermost side, and the first strand ( And a second strand S2 disposed between S1) and the third strand S3.

In this case, the first strand S1 is always disposed at the innermost side in every turn of the first spiral wire 131a. And the third strand (S3) is always disposed on the outermost. Accordingly, the first spiral wire 131a and the first strand S1 are connected to the first strand P1 of the second spiral wire 131b, and the first spiral wire 131a and the third strand S3 are second. When connected to the third strand (P3) of the helical wiring (131b), the total length of each coil strand (S1, S2, S3) is configured to be different from each other, thereby. Impedance may be biased on certain coil strands.

Therefore, in order to solve this problem, the communication wiring 130 according to the present embodiment constitutes the coil strands S1, S2, S3 and the second spiral wiring 131b constituting the first spiral wiring 131a. Coil strands (P1, P2, P3) to be connected in the reverse order along the radial direction to configure the total length of each coil strands the same.

Specifically, the first strand S1 disposed at the innermost side in the first spiral wire 131a is the third strand P3 disposed outermost at the second spiral wire 131b through the interlayer connection conductor 137a1. And the third strand S3 disposed on the outermost side of the first spiral wire 131a is disposed on the innermost side of the second spiral wire 131b through the interlayer connection conductor 137a3. ).

The second strand S2 of the first spiral wire 131a is connected to the second strand P2 of the second spiral wire 131b through the interlayer connection conductor 137a2.

As the communication wiring 130 is configured as described above, since the average of the distances from the center of the spiral wirings 131a and 131b to the respective coil strands S1, S2, and S3 is approximately uniformly arranged, impedance is applied to a specific coil strand. The bias can be suppressed.

When the total number of turns of the spiral wires 131a and 131b is even (eg, 10 turns), five turns may be disposed on both surfaces of the insulating substrate 111 so that the innermost turn can be configured as in the present embodiment.

On the other hand, when the total number of turns of the spiral wirings 131a and 131b is an odd number (eg, 11 turns), each of the turns of the spiral wirings 131a and 131b should be 5.5 turns on both sides of the insulating substrate 111, and thus, the present invention may be modified as in the following embodiments. have.

FIG. 11 is a plan view schematically illustrating a first surface of an antenna module according to another embodiment of the present invention, and FIG. 12 is a plan view schematically illustrating a second surface of the antenna module illustrated in FIG. 9. FIG. 13 is an enlarged view of portions A and B of FIGS. 11 and 12 enlarged.

11 to 13, the antenna module according to the present embodiment is configured similarly to the above-described antenna module and has a difference only in the structure of the innermost turn.

The communication wiring 130 of this embodiment is composed of odd turns (for example, 11 turns). Thereby, in order to arrange the spiral wirings 131a and 131b on both sides of the insulating substrate 111, the coil strands of one turn (the innermost turn) are distributed and disposed on both sides of the insulating substrate 111.

More specifically, the first spiral wire 131a does not have the innermost turn of the first strand S1, and the innermost turn of the second strand S2 ′ and the innermost turn of the third strand S3 ′. Only is placed. In addition, there is no innermost turn of the first strand P1 on the innermost side of the second spiral wire 131b, and only the innermost turn of the second strand P2 'and the innermost turn of the third strand P3' are disposed. do.

The first strand S1 of the first spiral wire 131a is connected to the third strand P3 ′ of the second spiral wire 131b through the interlayer connection conductor 137a1. Therefore, in the innermost turn, the first strand is disposed in the second spiral wire 131b.

In addition, the third strand S3 ′ of the first spiral wire 131a is connected to the first strand P1 of the second spiral wire 131b through the interlayer connection conductor 137a3. Therefore, in the innermost turn, the third strand is disposed in the first spiral wire 131a.

The second strand S2 'of the first spiral wire 131a is connected to the second strand P2' of the second spiral wire 131b through the interlayer connection conductors 137a2 and 137a2 '.

In other words, the first strand of the innermost turn is composed of the third strand P3 ′ of the second spiral wire 131b on the second surface of the insulating substrate 111. The third strand S3 ′ of the first spiral wire 131a is disposed on the first surface of the insulating substrate 111. In addition, the second strands S2 'and P2' are arranged in parallel on both sides of the insulating substrate 111 during the innermost turn.

To this end, interlayer connecting conductors 137a2 and 137a2 'are disposed on the second and second strands S2' and P2 'of the innermost turn, respectively, and are disposed on both sides of the insulating substrate 111. The strands S2 ', P2' are connected in a parallel structure. Since the parallel structure of the second strand S2 is similar to the parallel structure of the above-described embodiment, a detailed description thereof will be omitted.

Meanwhile, the line widths of the second strands S2 'and P2' may be configured to be narrower than the line widths of the other coil strands S3 'and P3'. For example, the line width of the second strand S2 may be formed to be half of the line width of the other coil strands S3 'and P3'. However, it is not limited thereto.

According to the antenna module configured as described above, even if the total number of turns of the helical wiring is an odd number, the antenna module can be evenly disposed on the first and second surfaces of the insulating substrate.

On the other hand, the present embodiment takes the case where the communication wiring is composed of three coil strands (S1, S2, S3) as an example, whereby the second strand is arranged in a parallel structure at the innermost turn. However, if the coil strands are composed of even (eg four strands), half of the coil strands of the innermost turn (eg the first strand, the second strand) are arranged to be included in the first spiral wire 131a and the rest Half (eg, third strand, fourth strand) may be arranged to be included in the second spiral line 131b.

 Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and changes can be made without departing from the technical spirit of the present invention described in the claims. It will be obvious to those of ordinary skill in the field.

For example, in the above-described embodiments, the case where only one communication wire is provided on the insulating substrate is taken as an example. However, the configuration of the present invention is not limited thereto, and it may be configured to include a plurality of communication wires. For example, the electronic device may further include a wire that performs at least one function of a radio frequency identification (RFID), a near field communication (NFC), and a magnetic secure transmission (MST).

In addition, the embodiments may be implemented in combination with each other. For example, a parallel structure applied to the outermost turn of the antenna module shown in FIGS. 7 and 8 may be applied to the outermost turn of the antenna module shown in FIG. 9 or 11.

In addition, in the above-described embodiment, only the innermost 1 turn (eg, FIG. 5) or the innermost 1 turn and the outermost 1 turn (eg, FIG. 7) have a parallel structure, but are not limited thereto. Various modifications are possible, such as configuring two or more turns in parallel if necessary.

100: antenna module
102: Magnet
110: wiring section
111: insulated substrate
130: communication wiring

Claims (18)

Insulating substrate;
A first spiral wire disposed on a first surface of the insulating substrate and formed of a plurality of coil strands spaced apart from each other;
A second spiral wire disposed on a second surface of the insulating substrate and composed of a plurality of coil strands spaced apart from each other; And
Interlayer connection conductors disposed in the insulating substrate to electrically connect the first spiral wire and the second spiral wire;
Including;
And the coil strands of the first helical wire are connected to the coil strands of the second helical wire in reverse order along the radial direction.
The method of claim 1, wherein the plurality of coil strands,
The antenna module of which the total length comprised by the said 1st spiral wiring, the said interlayer connection conductor, and the said 2nd spiral wiring is comprised all the same.
The method of claim 1,
And an innermost coil strand of the coil strands constituting the first spiral wire is connected to a coil strand disposed at the outermost side of the coil strands constituting the second spiral wire.
The method of claim 1,
And at the innermost turn of the first spiral wire and the second spiral wire, the coil strands are distributed on the first and second surfaces of the insulating substrate.
The method of claim 1,
The total line width of the first spiral wiring is the same as the total line width of the second spiral wiring.
The method of claim 1, wherein the first spiral wiring and the second spiral wiring,
Antenna modules connected in series.
The method of claim 1, wherein the first spiral wiring and the second spiral wiring,
An antenna module in which spirals are formed in the same direction.
The method of claim 1, wherein the first spiral wiring and the second spiral wiring,
An antenna module in which spirals are formed in the same direction.
The method of claim 1, wherein the coil strands,
Antenna modules configured to all have the same line width.
The method of claim 1,
Connection pads disposed on the insulating substrate; And
And an outgoing wire for connecting the first spiral wire and the second spiral wire with the connection pads, respectively.
The method of claim 10, wherein the coil strands,
An antenna module electrically connected to each other in the lead wire;
The method of claim 10, wherein the coil strands,
An antenna module electrically connected to each other by the connection pads.
The method of claim 10,
And a magnetic part disposed to face the first spiral wire or the second spiral wire.
The method of claim 1, wherein the coil strands,
Antenna module electrically connected to each other outside the spiral wiring.
A wiring unit in which communication wirings are disposed on both sides of the insulating substrate; And
A magnetic part coupled to one surface of the wiring part;
Including;
The communication wiring includes a spiral wiring composed of a plurality of coil strands spaced apart from each other,
And the coil strands disposed on the first surface of the insulating substrate are connected to the coil strands disposed on the second surface of the insulating substrate in a reverse order along the radial direction.
The method of claim 15,
The electronic device further comprises an adhesive portion interposed between the wiring portion and the magnetic portion.
The method of claim 16, wherein the adhesive portion,
Electronic device containing ferrite powder.
The method of claim 15,
And a battery for storing power received by the wiring unit.

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