阅读说明：本技术 组合天线模块 (Combined antenna module ) 是由 张吉在 金彻翰 于 2019-03-13 设计创作，主要内容包括：公开了一种组合天线模块,其中,将容纳凹槽形成在线圈图案中,并且将与设置在另一个表面上的线圈图案连接的连接图案设置在容纳凹槽中,以便使安装空间最小化并且提供大于或等于常规天线模块的天线性能的天线性能。所公开的组合天线模块包括用于近场通信的线圈图案和用于无线电力传输的线圈图案。用于无线电力传输的线圈图案具有通过改变设置在一个表面上的线圈图案的线宽而形成的容纳凹槽,并且用于连接设置在另一个表面上的线圈图案的连接图案被设置在容纳凹槽中,以便使安装空间最小化并且提供大于或等于常规天线模块的天线性能的天线性能。(Disclosed is a combined antenna module, wherein an accommodation groove is formed in a coil pattern, and a connection pattern connected with the coil pattern disposed on the other surface is disposed in the accommodation groove, so as to minimize a mounting space and provide an antenna performance greater than or equal to that of a conventional antenna module. The disclosed combination antenna module includes a coil pattern for near field communication and a coil pattern for wireless power transmission. The coil pattern for wireless power transmission has an accommodation groove formed by changing a line width of the coil pattern disposed on one surface, and a connection pattern for connecting the coil pattern disposed on the other surface is disposed in the accommodation groove, so as to minimize a mounting space and provide antenna performance greater than or equal to that of a conventional antenna module.)

1. A combination antenna module, comprising:

a base substrate in which a receiving hole is formed;

a coil pattern for short-range communication provided on one surface of the base substrate and on an outer periphery of the accommodation hole; and

an antenna sheet having coil patterns for wireless power transmission disposed on both surfaces of the base substrate,

wherein the coil pattern for wireless power transmission includes:

a second coil pattern formed with a plurality of receiving grooves and disposed on one surface of the base substrate;

a plurality of third coil patterns disposed to be spaced apart from each other on the other surface of the base substrate and having both ends facing each other and spaced apart from each other to form a second through path; and

a plurality of second connection patterns respectively provided in the plurality of accommodation grooves such that at least some of the plurality of second connection patterns overlap the second through paths, and

wherein the plurality of third coil patterns are connected to each other by the plurality of second connection patterns.

2. The combination antenna module according to claim 1,

wherein the second coil pattern is formed such that a line width of a region where the receiving groove is formed is narrower than a line width of other regions.

3. The combination antenna module according to claim 2,

wherein the second coil pattern is formed such that a line width obtained by adding the line width of the region in which the receiving groove is formed, the line width of the second connection pattern, and the separation interval between the receiving groove and the second connection pattern is less than or equal to a line width of the other region.

4. The combination antenna module according to claim 2,

wherein the second coil patterns are provided in a spiral shape, and a separation interval between the second coil patterns and the second connection pattern are the same.

5. The combination antenna module according to claim 1,

wherein at least a portion of the plurality of receiving grooves overlaps the second through path.

6. The combination antenna module according to claim 1,

wherein the coil pattern for wireless power transmission further includes a fourth lead-out pattern, and

wherein the fourth lead-out pattern is connected to one of the plurality of third coil patterns and is disposed across the plurality of third coil patterns on the second through path.

7. The combination antenna module according to claim 6,

wherein the coil pattern for wireless power transmission further comprises:

a third lead-out pattern disposed on one surface of the base substrate and connected to one end of the second coil pattern; and

a fifth lead-out pattern disposed to be spaced apart from the third lead-out pattern on one surface of the base substrate and connected to the fourth lead-out pattern.

8. The combination antenna module according to claim 1,

wherein the coil pattern for wireless power transmission further comprises: a plurality of second through holes penetrating the base substrate to connect the second connection pattern with the third coil pattern, and

wherein a plurality of second through holes connect the second connection pattern with the third coil pattern.

9. The combination antenna module according to claim 1,

wherein the base substrate is formed with a protrusion extending in an inner direction of the accommodation hole, and

the combination antenna module further includes a terminal member having a plurality of terminals connected to the coil pattern for short-range communication and the coil pattern for wireless power transmission, and the terminal member is formed on the protrusion.

10. The combination antenna module according to claim 1,

wherein the coil pattern for short-range communication includes:

a plurality of first coil patterns disposed on one surface of the base substrate along an outer circumference of the accommodation hole and having both end portions facing each other and spaced apart from each other to form a first through path; and

a plurality of first connection patterns on the other surface of the base substrate, at least some of the plurality of first connection patterns overlapping the first through path, one end of the plurality of first connection patterns being connected to one of the plurality of first coil patterns and the other end being connected to another one of the plurality of first coil patterns.

11. The combination antenna module according to claim 10,

wherein the coil pattern for wireless power transmission is disposed across the plurality of third coil patterns on the first through path.

12. The combination antenna module according to claim 10,

wherein the coil pattern for wireless power transmission further comprises:

a first lead-out pattern connected to a first coil pattern disposed closest to the accommodation hole among the plurality of first coil patterns; and

a second lead-out pattern connected to a first coil pattern disposed closest to an outer circumference of the base substrate among the plurality of first coil patterns.

13. The combination antenna module according to claim 1,

wherein a line width of the coil pattern for short-range communication is narrower than a line width of the coil pattern for wireless power transmission.

14. The combination antenna module of claim 1, further comprising:

a first magnetic member disposed on the other surface of the base substrate and overlapping the coil pattern for short-range communication.

15. The combination antenna module according to claim 14,

wherein the first magnetic member is formed of a ferrite sheet.

16. The combination antenna module of claim 14, further comprising:

a second magnetic member spaced apart from the first magnetic member and disposed on the other surface of the base substrate and overlapping the coil pattern for wireless power transmission.

17. The combination antenna module according to claim 16,

wherein the second magnetic member is made of a material different from that of the first magnetic member.

18. The combination antenna module according to claim 16,

wherein the second magnetic member is a magnetic member in which a plurality of strip-shaped sheets are laminated.

19. The combination antenna module according to claim 18,

wherein the plurality of strip-shaped sheets comprise at least one of grain alloy strips and iron-based amorphous strips.

20. The combination antenna module according to claim 16,

wherein a thickness of the first magnetic member is equal to or less than a thickness of the second magnetic member.

Technical Field

The present disclosure relates to a combined antenna module, and more particularly, to a combined antenna module mounted on a portable terminal to perform wireless power transmission and short-range communication.

Background

With the development of technology, a short-range communication function and a wireless power transmission (or wireless charging) function are being applied to portable terminals. That is, the portable terminal transmits and receives data to and from other electronic devices using a short-range communication (e.g., NFC) function, and charges a built-in battery using a wireless power transmission (or wireless charging) function.

Meanwhile, since the portable terminal market requires miniaturization and thinning of the portable terminal, the size and thickness of the portable terminal are reduced, so that the installation space of the internal components is reduced.

According to market demands, various types of antenna modules are being developed, which have antenna performance equal to or greater than that of conventional antenna modules while minimizing installation space.

Disclosure of Invention

Technical problem

The present disclosure is proposed to solve the above-mentioned conventional problems, and an object of the present disclosure is to provide a combined antenna module that forms an accommodation groove in a coil pattern and disposes a connection pattern connected with the coil pattern disposed on another surface in the accommodation groove, thereby minimizing an installation space of the antenna module and providing antenna performance equal to or greater than that of the conventional antenna module.

Technical scheme

A combined antenna module for achieving the object according to an exemplary embodiment of the present disclosure may include a coil pattern for short-range communication disposed on one surface of a base substrate, and coil patterns for wireless power transmission disposed on both surfaces of the base substrate.

The coil pattern for wireless power transmission may have an accommodation groove formed by changing a line width of the coil pattern disposed on one surface of the base substrate. The coil pattern for wireless power transmission may have a connection pattern connecting the coil patterns disposed on the rear surface of the base substrate, the connection pattern being disposed in the receiving groove. At this time, the coil pattern and the connection pattern disposed on the rear surface of the base substrate may be connected through the via hole. A plurality of through holes may be configured to ensure connection stability between the coil patterns.

Advantageous effects

According to the present disclosure, the combined antenna module may have a connection pattern disposed in the receiving groove of the coil pattern, thereby minimizing an installation space of the antenna module and providing an antenna performance equal to or greater than that of the conventional antenna module.

In addition, the combined antenna module may have a terminal formed in an inner circumferential area of the coil pattern for short-range communication, and have a coil pattern for wireless power transmission connected to the terminal through a through path formed by the coil pattern for short-range communication, thereby minimizing a resistance change due to disconnection of the coil pattern.

In addition, the combined antenna module may have a terminal formed in an inner circumferential area of the coil pattern for short-range communication, and have a coil pattern for wireless power transmission connected to the terminal through a through path formed by the coil pattern for short-range communication, thereby minimizing a resistance variation of the coil pattern to minimize an efficiency variation of antenna performance.

In addition, the combined antenna module may have a terminal formed in an inner circumferential area of a coil pattern for short-range communication, and have a coil pattern for wireless power transmission connected to the terminal through a through path formed by the coil pattern for short-range communication, thereby minimizing an installation space of the antenna module and providing antenna performance equal to or greater than that of a conventional antenna module.

In addition, the combined antenna module may constantly maintain the interval between the coil patterns, thereby minimizing an installation space of the antenna module to improve mass productivity, and preventing short circuits between the coil patterns.

In addition, the combined antenna module may connect patterns formed on one surface and the other surface of the base substrate through a plurality of through holes, thereby securing connection stability between the patterns and improving communication performance of the antenna module.

Drawings

Fig. 1 and 2 are schematic diagrams for explaining an example to which a combined antenna module according to an exemplary embodiment of the present disclosure is applied.

Fig. 3 and 4 are schematic diagrams for explaining a combined antenna module according to an exemplary embodiment of the present disclosure.

Fig. 5 and 6 are schematic views for explaining the antenna sheet shown in fig. 3.

Fig. 7 is a schematic view for explaining a substrate sheet shown in fig. 5.

Fig. 8 is an enlarged view of an area a for explaining a coil pattern for short-range communication shown in fig. 5.

Fig. 9 is an enlarged view of a region B illustrated in fig. 5 for explaining a coil pattern for wireless power transmission.

Fig. 10 is an enlarged view of a region C for explaining a coil pattern for wireless power transmission shown in fig. 6.

Detailed Description

Hereinafter, the most preferred exemplary embodiments of the present disclosure will be described with reference to the accompanying drawings in order to specifically describe the exemplary embodiments so that those skilled in the art to which the present disclosure pertains can easily realize the technical spirit of the present disclosure. First, in adding reference numerals to components in each drawing, it should be noted that the same components are denoted by the same reference numerals as much as possible even if they are shown in different drawings. In addition, in the description of the present disclosure, if a detailed description of known configurations or functions will make the gist of the present disclosure obscure, the detailed description of the known configurations or functions will be omitted.

Referring to fig. 1, a combined antenna module according to an exemplary embodiment of the present disclosure is embedded in a portable terminal 10 to perform short-range communication. That is, the combined antenna module is embedded in the portable terminal 10 to transmit and receive data to and from the antenna module embedded in the other portable terminal 10. At this time, the combined antenna module wirelessly transmits and receives data by a Near Field Communication (NFC) method, as an example.

Referring to fig. 2, a combined antenna module according to an exemplary embodiment of the present disclosure is embedded in a portable terminal 10 to wirelessly transmit and receive power. That is, a combined antenna module is embedded in the portable terminal 10 to wirelessly receive power from a wireless power transmission antenna embedded in the charging device 20. The combined antenna module may also wirelessly transmit power to a wireless power transmission antenna embedded in another portable terminal 10. At this time, the combined antenna module wirelessly transmits and receives Power by a Wireless Power Consortium (WPC) method, as an example.

Referring to fig. 3 and 4, the combined antenna module 100 according to the exemplary embodiment of the present disclosure is configured to include an antenna sheet 200, a first magnetic member 300, and a second magnetic member 400. At this time, an adhesive substrate (not shown) may also be interposed between the antenna sheet 200 and the first magnetic member 300 and between the antenna sheet 200 and the second magnetic member 400.

Referring to fig. 5 and 6, the antenna sheet 200 is configured to include a base substrate 210, a terminal member 220, a coil pattern 230 for short-range communication, and a coil pattern 240 for wireless power transmission. Hereinafter, one surface of the base substrate 210 is one of the upper and lower surfaces of the base substrate 210, and the other surface of the base substrate 210 is the other of the upper and lower surfaces of the base substrate 210.

The base substrate 210 may be formed of a thin film substrate such as a film, a sheet, or a thin film substrate. The base substrate 210 may be a Flexible Printed Circuit Board (FPCB). As an example, the base substrate 210 is a polypropylene (PP) sheet. Here, the base substrate 210 is not limited thereto, and various uses may be made as long as the base substrate is a thin film substrate or a substrate on which a coil pattern constituting an antenna can be formed.

Referring to fig. 7, the base substrate 210 may be formed with receiving holes 212 and protrusions 214.

The receiving hole 212 may be a hole through which a camera, a flash, etc. of the portable terminal 10 pass. That is, if the combined antenna module 100 is mounted on the portable terminal 10, a camera, a flash, etc. of the portable terminal 10 pass through the receiving hole 212 of the base substrate 210 and are disposed on the rear surface of the portable terminal 10.

The receiving hole 212 is formed by passing through the base substrate 210. The receiving hole 212 is formed adjacent to the base substrate 210 at one side thereof.

The protrusion 214 has a terminal member 220 provided on at least one of two surfaces thereof. The protrusion 214 may be formed to extend from the receiving hole 212. The protrusion 214 may be formed to extend in an inner direction of the receiving hole 212 (i.e., a direction of a center point of the receiving hole 212).

The terminal member 220 may include a plurality of terminals 222 connected to a coil pattern 230 for short-range communication and a coil pattern 240 for wireless power transmission. The plurality of terminals 222 are disposed to be spaced apart from each other at a predetermined interval. As an example, the terminal member 220 includes first and second terminals 222a and 222b connected to both ends of the coil pattern 230 for short-range communication, respectively, and third and fourth terminals 222c and 222d connected to both ends of the coil pattern 240 for wireless power transmission, respectively.

The coil pattern 230 for short-range communication is a pattern for Near Field Communication (NFC) and is disposed on one surface of the base substrate 210. The coil pattern 230 for short-range communication may be formed by drawing a spiral shape on a plane formed by the base substrate 210 (i.e., one surface of the base substrate 210). The coil pattern 230 for short-range communication is disposed along the outer circumference of the receiving hole 212 of the base substrate 210.

A portion of the coil pattern 230 for short-range communication may be disposed on the other surface of the base substrate 210 to form a through path in which the coil pattern 240 for wireless power transmission is disposed across. Here, the through path means not only throughout all of the coil patterns 230 for short-range communication but also throughout only some of the coil patterns 230 for short-range communication.

The coil pattern 230 for short-range communication may include a plurality of first coil patterns 231 and a plurality of first connection patterns 232.

A plurality of first coil patterns 231 are disposed on one surface of the base substrate 210. The plurality of first coil patterns 231 may be disposed along the outer circumference of the receiving hole 212. The plurality of first coil patterns 231 are disposed between the outer circumference of the base substrate 210 and the outer circumference of the receiving hole 212. The plurality of first coil patterns 231 are disposed to be spaced apart from each other at a predetermined interval. Both ends of the first coil pattern 231 are disposed to face each other and are disposed to be spaced apart from each other at a predetermined interval.

The plurality of first coil patterns 231 may form a first through path 520. The first through path 520 is a region in which the coil pattern 240 for wireless power transmission is disposed to cross the coil pattern 230 for short-range communication. As an example, the first through path 520 is a separation region between both ends of the plurality of first coil patterns 231. Here, the first through path 520 may mean not only all of the plurality of first coil patterns 231 but also only some of the plurality of first coil patterns 231.

A plurality of first connection patterns 232 are disposed on the other surface of the base substrate 210. One end of the first connection pattern 232 is connected to the first coil pattern 231, and the other end of the first connection pattern 232 is connected to another first coil pattern 231.

Referring to fig. 8, the first connection pattern 232 is disposed to overlap a portion of the first through path 520 and a portion of the first coil pattern 231. The first connection pattern 232 is connected with the two first coil patterns 231 through the first via 233. One end of the first connection pattern 232 is connected to the first coil pattern 231 through the first via 233. The other end of the first connection pattern 232 is connected to another first coil pattern 231 through a first via 233.

Both ends of the coil pattern 230 for short-range communication are connected with different terminals 222 of the terminal member 220. Any one of the plurality of first coil patterns 231 is connected with any one of the plurality of terminals 222, and another one of the plurality of first coil patterns 231 is connected with another one of the plurality of terminals 222.

As an example, the first coil pattern 231 disposed closest to the receiving hole 212 among the plurality of first coil patterns 231 passes through the first lead out pattern 234 to be connected with the first terminal 222a of the terminal member 220, and the first coil pattern 231 disposed closest to the outer circumference of the base substrate 210 among the plurality of first coil patterns 231 passes through the second lead out pattern 235 to be connected to the second terminal 222b of the terminal member 220.

With the above-described configuration, the coil pattern 230 for short-range communication forms a pattern having a spiral shape. A line width of the coil pattern 230 for short-range communication may be formed to be narrower than a line width of the coil pattern 240 for wireless power transmission. By narrowly forming the line width, the coil pattern 230 for short-distance communication has an increased number of turns in the same area, thereby improving efficiency.

At this time, since the coil pattern 230 for short-range communication is formed to have a narrow line width, an opening may occur in the first via hole 233. When the opening occurs in the first via hole 233, the coil pattern 230 for short-range communication has reduced connection stability, thereby reducing short-range communication performance.

Accordingly, in order to secure connection stability and improve communication performance, the plurality of first through holes 233 may be configured. As an example, the plurality of first through holes 233 are arranged in a row in the longitudinal direction of the first connection pattern 232.

The coil pattern 240 for wireless power transmission is a pattern for wireless power transmission (WPC) and is disposed on both surfaces of the base substrate 210. The coil pattern 240 for wireless power transmission may be formed by drawing a spiral shape on one surface of the base substrate 210 and then by drawing a spiral shape on the other surface of the base substrate.

The coil pattern 240 for wireless power transmission may be configured to include a second coil pattern 241, a third lead out pattern 242, a plurality of third coil patterns 243, a plurality of second connection patterns 244, a fourth lead out pattern 245, and a fifth lead out pattern 246.

The second coil pattern 241 is disposed on one surface of the base substrate 210. The second coil pattern 241 is disposed to be spaced apart from the first coil pattern 231. The second coil pattern 241 may be formed by drawing a spiral shape on one surface of the base substrate 210.

One end of the second coil pattern 241 is connected to the terminal member 220 through the third lead out pattern 242. The other end of the second coil pattern 241 is connected to any one of a plurality of third coil patterns 243 through the second through hole 247. Here, the plurality of second through holes 247 may be configured to ensure connection stability between the second and third coil patterns 241 and 243. If a plurality of second through holes 247 are configured, the second through holes are arranged in a line in the longitudinal direction of the second coil pattern 241.

Referring to fig. 9, the second coil pattern 241 may be formed with a plurality of receiving grooves 248 in which a plurality of second connection patterns 244 are received. The line width of some regions of the second coil pattern 241 may be narrower than the line width of other regions. The region having a narrower line width than the other region may form the receiving groove 248. Accordingly, the second coil pattern 241 is formed to have a line width of a portion in which the receiving groove 248 is formed, which is narrower than that of the other portion. The second coil pattern 241 may have a line width obtained by adding a line width of a region in which the receiving groove 248 is formed, a line width of the second connection pattern 244, and a separation interval between the receiving groove 248 and the second connection pattern 244, the line width of the region in which the receiving groove is formed being smaller than or equal to line widths of other regions.

At this time, since the second coil pattern 241 is formed in a spiral shape, the plurality of receiving grooves 248 are provided to partially overlap with a second through path 540 formed of a plurality of third coil patterns 243, which will be described later. The second connection pattern 244 is disposed in each of the receiving grooves 248. As an example, the separation interval between the second coil patterns 241 and the second connection patterns 244 are the same.

The third lead-out pattern 242 is disposed on one surface of the base substrate 210. The third lead-out pattern 242 is disposed on the first through path 520. The third lead-out pattern 242 is disposed across the coil pattern 230 for short-range communication.

The third lead out pattern 242 is connected to the second coil pattern 241 and one of the plurality of terminals 222. As an example, one end of the third lead out pattern 242 is connected with one end of the second coil pattern 241, and the other end of the third lead out pattern 242 is connected to the third terminal 222c of the terminal member 220.

A plurality of third coil patterns 243 are disposed on the other surface of the base substrate 210. The plurality of third coil patterns 243 are spaced apart from each other at predetermined intervals. The plurality of third coil patterns 243 are disposed along the outer circumference of the central region of the base substrate 210, and are sequentially disposed in the outer circumferential direction of the base substrate 210. One third coil pattern disposed closest to the central area among the plurality of third coil patterns 243 is connected to the other end of the second coil pattern 241 through the second through hole 247.

Referring to fig. 10, the plurality of third coil patterns 243 may form a second through path 540 on the other surface of the base substrate 210. The second through path 540 is a region provided to cross the plurality of third coil patterns 243. Both ends of the third coil pattern 243 are disposed to face each other and spaced apart from each other at a predetermined interval to form a separation region. As an example, the second through path 540 is a separation region between both ends of the third coil pattern 243. Here, the second penetration path 540 means not only penetration through all of the plurality of third coil patterns 243 but also penetration through only some of the plurality of third coil patterns 243.

A plurality of second connection patterns 244 are disposed on one surface of the base substrate 210. The second connection pattern 244 is disposed between the second coil patterns 241 disposed in a spiral shape. The second connection pattern 244 is received in a receiving groove 248 formed in the second coil pattern 241. The plurality of second connection patterns 244 are disposed to overlap the second through paths 540 formed on the other surface of the base substrate 210. At this time, the second connection patterns 244 are disposed to be spaced apart from the adjacent second coil patterns 241 at predetermined intervals.

The second connection pattern 244 is connected with the second coil pattern 241 through the third via hole 249. Both ends of the second connection pattern 244 are connected with two different third coil patterns 243 through the third via hole 249. At this time, the plurality of third through holes 249 may be configured to ensure connection stability between the third coil pattern 243 and the second connection pattern 244. If a plurality of third through holes 249 are configured, the third through holes 249 are arranged in a row in the longitudinal direction of the second connection pattern 244.

Accordingly, the third coil pattern 243 and the second connection pattern 244 surround the other surface and one surface of the base substrate 210 to form a coil pattern having a spiral shape.

The fourth lead-out pattern 245 is disposed on the other surface of the base substrate 210. The fourth lead-out pattern 245 is disposed on the second through path 540 and is disposed to cross the third coil pattern 243. One end of the fourth lead-out pattern 245 is connected to one of the third coil patterns 243, and the other end of the fourth lead-out pattern 245 is connected to the fifth lead-out pattern 246 through a fourth via hole. At this time, one end of the fourth lead-out pattern 245 is connected to the third coil pattern 243 disposed closest to the central region of the base substrate 210 among the plurality of third coil patterns 243. The fourth lead pattern 245 is connected to the third coil pattern 243, which is connected to the second coil pattern 241 through the second via hole 247.

The fifth lead-out pattern 246 is disposed on one surface of the base substrate 210. One end of the fifth lead pattern 246 is connected to the fourth lead pattern 245 through the fourth via hole. The other end of the fifth lead out pattern 246 is connected to the terminal 222 of the terminal member 220. As an example, the other end of the fifth lead out pattern 246 is connected to the fourth terminal 222d of the terminal member 220.

If disconnection occurs in the coil patterns for short-range communication and wireless power transmission, the coil patterns have resistance variations. At this time, the coil pattern 240 for wireless power transmission has a larger variation in efficiency according to the variation in resistance than the coil pattern 230 for short-range communication.

Accordingly, in the antenna sheet 200, the coil pattern 230 for short-range communication having relatively small variation in efficiency due to variation in resistance is disconnected to form the fourth through path 520, and the coil pattern 240 for wireless power transmission is disposed to pass through the first through path 520.

In addition, although mass productivity increases when the interval between the coil patterns increases, the volume of the combined antenna module 100 increases. In contrast, when the intervals between the coil patterns are narrowed, short circuits (short circuits) occur between the coil patterns, thereby reducing mass productivity.

Accordingly, the antenna sheet 200 is formed to have a set interval (e.g., about 100 μm) as an interval between the coil patterns, thereby improving mass productivity.

The first magnetic member 300 may be a plate-shaped substrate or a thin film made of a magnetic material. The first magnetic member 300 and the second magnetic member 400 are separately formed. The first magnetic member 300 is made of a different material from the second magnetic member 400 to have a different dielectric characteristic from the second magnetic member 400. As an example, the first magnetic member 300 is a plate-shaped substrate made of a ferrite material.

The first magnetic member 300 is disposed on the other surface of the base substrate 210. The first magnetic member 300 is disposed on a portion of the other surface of the base substrate 210 to overlap the coil pattern 230 for short-range communication. At this time, the thickness of the first magnetic member 300 may be formed to be equal to or thinner than the thickness of the second magnetic member 400. That is, the thickness of the first magnetic member 300 may be the thickness of the second magnetic member 400 or less. As an example, the first magnetic member 300 is formed to have a thickness of about 100 to 120 μm.

The second magnetic member 400 may be a plate-shaped substrate or a thin film made of a magnetic material. The second magnetic member 400 is formed separately from the first magnetic member 300. The second magnetic member 400 is made of a material different from that of the first magnetic member 300 to have a dielectric characteristic different from that of the first magnetic member 300.

The second magnetic member 400 may be a plate-shaped substrate on which a plurality of strip-shaped sheets are laminated. If the strip sheet is formed of a single layer, dielectric characteristics corresponding to the coil pattern 240 for wireless power transmission may not be achieved. Accordingly, the second magnetic member 400 is configured by laminating a plurality of strip-shaped sheets. The second magnetic member 400 may be formed by laminating one or more strip-shaped sheets of a grain alloy strip and an iron-based amorphous strip into a plurality of layers. At this time, the second magnetic member 400 may further have an adhesive sheet (not shown) interposed between the tape sheets.

The second magnetic member 400 is disposed on the other surface of the base substrate 210. The second magnetic member 400 is disposed on a portion of the other surface of the base substrate 210 to overlap the coil pattern 240 for wireless power transmission. At this time, the thickness of the second magnetic member 400 may be equal to or greater than the thickness of the first magnetic member 300. That is, the thickness of the second magnetic member 400 may be a thickness greater than or equal to the thickness of the first magnetic member 300. As an example, the second magnetic member 400 is formed to have a thickness of about 120 to 130 μm.

While preferred exemplary embodiments of the present disclosure have been described above, it should be understood that the present disclosure may be modified in various forms and that those skilled in the art may practice the various modified and altered examples without departing from the scope of the claims of the present disclosure.