Antenna module

Abstract

This invention discloses an antenna module in which a portion of a shielding sheet overlapping with a magnet mounted on the antenna sheet is punched out to prevent the shielding sheet from being magnetically saturated (magnetized) by the magnet. The disclosed antenna module includes: an antenna sheet having a radiating pattern formed thereon and a magnet array formed and inserted along the outer periphery of the radiating pattern; and a shielding sheet laminated on the antenna sheet and having anti-overlap holes formed in the region overlapping with the magnet array.

Description

Technical Field

[0001] This invention relates to an antenna module, and more specifically, to an antenna module that is mounted on a portable terminal and supports wireless power transmission. Background Technology

[0002] Mobile terminals charge their built-in batteries using a charging cable and are powered by the electricity generated by the batteries. In recent years, with the development of wireless power transmission technology, the method of wirelessly charging batteries using wireless power transmission technology has been applied to portable terminals.

[0003] Wireless charging is a charging method that wirelessly transmits power through coil antennas built into the transmitting side (Tx, charger) and the receiving side (Rx, portable terminal).

[0004] Even with slow charging, wireless charging still achieves a specified charging efficiency, even if the transmitting and receiving antennas are not properly aligned.

[0005] However, in the case of fast charging, if the antenna on the transmitting side and the antenna on the receiving side are not properly aligned, the charging efficiency of wireless charging will be reduced, and the portable terminal and / or charger will become severely overheated during the charging process.

[0006] Therefore, various studies have been conducted to ensure proper alignment of the portable terminal's antenna and the charger's antenna when installing a charger on a portable terminal. Summary of the Invention

[0007] Technical issues

[0008] The present invention is proposed to solve the above-mentioned problems, and the object of the present invention is to provide an antenna module that can prevent the shielding sheet from being magnetically saturated (magnetized) by the magnet mounted on the antenna sheet by punching out the portion of the shielding sheet that overlaps with the magnet throughout the entire area.

[0009] Solution to the technical problem

[0010] To achieve the above objectives, an antenna module according to an embodiment of the present invention includes: an antenna sheet having a radiating pattern formed thereon and a magnet array formed and inserted therein along the outer periphery of the radiating pattern; and a shielding sheet laminated on the antenna sheet and having anti-overlap holes formed in the region overlapping with the magnet array.

[0011] The magnet array includes a plurality of magnet units arranged in an annular arc along the outer periphery of the radiation pattern. Each magnet unit includes: an S-pole permanent magnet disposed spaced apart from the outer periphery of the radiation pattern; and an N-pole permanent magnet disposed between the outer periphery of the radiation pattern and the S-pole permanent magnet.

[0012] The antenna sheet may include: a substrate sheet having a first through-hole and a second through-hole formed thereon; a first radiating pattern formed on the substrate sheet and shaped as a loop having an inlet path and an outlet path; a second radiating pattern formed on the substrate sheet, configured to enter the inner peripheral region of the first radiating pattern through the inlet path to form an inner loop, and disposed outside the first radiating pattern through the outlet path; a first magnet array configured to penetrate the first through-hole and disposed along the outer periphery of the first radiating pattern; and a second magnet array configured to be spaced apart from the first magnet array and penetrate the second through-hole, and disposed along the outer periphery of the first radiating pattern.

[0013] The first radiating pattern may include: an upper radiating pattern formed on a first surface of the substrate sheet; and a lower radiating pattern formed on a second surface of the substrate sheet and connected to the upper radiating pattern through a through-hole penetrating the substrate sheet; wherein the upper radiating pattern is formed in a loop shape having the inlet path and the outlet path.

[0014] The first magnet array and the second magnet array may be configured such that their ends face each other and are spaced apart from each other, and are constructed to form the inlet path and outlet path of the second radiation pattern.

[0015] The antenna sheet includes a first magnet array and a second magnet array, and the shielding sheet includes: a first anti-overlap hole formed in the region of the shielding sheet and overlapping with the first magnet array; and a second anti-overlap hole formed in the region of the shielding sheet and overlapping with the second magnet array.

[0016] The first magnet array can be housed in the first anti-overlap hole by penetrating the antenna sheet, and the second magnet array can be housed in the second anti-overlap hole by penetrating the antenna sheet.

[0017] The antenna module may further include a heat-diffusing sheet laminated on the shielding sheet, and the first anti-overlap hole is configured to form a first opening between the first magnet array and the heat-diffusing sheet; and the second anti-overlap hole is configured to form a second opening between the second magnet array and the heat-diffusing sheet.

[0018] Beneficial effects of the invention

[0019] According to the present invention, the antenna module has the following effect: by punching out the portion of the shielding sheet that overlaps with the magnet in the entire region, it is possible to prevent the shielding sheet from being magnetically saturated (magnetized) by the magnet mounted on the antenna sheet.

[0020] Furthermore, the antenna module has the following effect: by punching out the portion of the shielding sheet that overlaps with the magnet mounted on the antenna sheet, the shielding performance of the shielding sheet can be prevented from being reduced.

[0021] Furthermore, the antenna module has the following effect: by punching out the portion of the shielding sheet that overlaps with the magnet throughout the entire area, the shielding sheet is prevented from being magnetically saturated (magnetized) by the magnet mounted on the antenna sheet, thereby preventing a reduction in characteristics of the antenna module, such as inductance or charging efficiency. Attached Figure Description

[0022] Figure 1 This is a diagram illustrating an antenna module according to an embodiment of the present invention.

[0023] Figure 2 This is an explanation Figure 1 A top view of the antenna sheet.

[0024] Figure 3 This is an explanation Figure 2 A bottom view of the antenna sheet.

[0025] Figure 4 This is an explanation Figure 3 Diagrams of the first and second magnet arrays.

[0026] Figure 5 This is an explanation Figure 1 A diagram of the magnetic sheet.

[0027] Figure 6 This is a diagram illustrating the laminated structure of an antenna module according to an embodiment of the present invention.

[0028] Figure 7 This is a diagram illustrating an example of a modified laminated structure of an antenna module according to an embodiment of the present invention.

[0029] Figure 8 and 9 This is a view illustrating a modified example of an antenna module according to an embodiment of the present invention. Detailed Implementation

[0030] To illustrate the technical concept of this invention in a way that is readily apparent to those skilled in the art, the most preferred embodiments of the invention will be described with reference to the accompanying drawings. The invention will be described in detail to the extent that those skilled in the art can readily implement its technical concept. First, when adding reference numerals to components in the various drawings, it should be noted that identical components should, as far as possible, have the same reference numerals even when shown in different drawings. Furthermore, in describing the invention, detailed descriptions of related known structures or functions will be omitted if such detailed descriptions might obscure the subject matter of the invention.

[0031] Please see Figure 1 According to an embodiment of the present invention, the antenna module is configured to include an antenna sheet 100 having a first surface and a second surface, and a shielding sheet 200 disposed on the second surface of the antenna sheet 100.

[0032] Multiple radiation patterns resonating in different frequency bands are formed on the antenna sheet 100. For example, a first radiation pattern 120 for wireless power transmission and a second radiation pattern 130 for short-range communication are formed on the antenna sheet 100. A magnet is provided on the antenna sheet 100 to align the antenna sheet 100 with a wireless charger. An annular arc-shaped magnet is provided on the antenna sheet 100 along the outer periphery of the first radiation pattern 120.

[0033] Reference Figure 2 and 3 The antenna sheet 100 includes a substrate sheet 110, a first radiating pattern 120, a second radiating pattern 130, a first magnet array 140, and a second magnet array 150.

[0034] The substrate sheet 110 is a plate-shaped material having a first surface and a second surface. For example, the substrate sheet 110 is a resin sheet formed from a material such as polyimide.

[0035] The first radiation pattern 120 is a radiation pattern for wireless power transmission. The first radiation pattern 120 includes an upper radiation pattern 121 and a lower radiation pattern 122.

[0036] An upper radial pattern 121 is formed on a first surface of a substrate sheet 110, forming a first loop that is wound multiple times on the first surface of the substrate sheet 110. In this case, the upper radial pattern 121 forms an inlet path R1 and an outlet path R2. In the inlet path R1, a second radial pattern 130 enters the inner periphery of the first loop from the outside of the first loop, and in the outlet path R2, the second radial pattern 130 leaves the outer periphery of the first loop from the inner periphery to the outside of the first loop.

[0037] Here, the entry path R1 and the exit path R2 refer to the paths through which the second radiating pattern 130 passes to form an inner loop in the inner peripheral region of the first loop. The entry path R1 and the exit path R2 are formed to extend from the inner periphery of the first loop to the outer periphery and pass through the first radiating pattern 120. The entry path R1 and the exit path R2 are spaces in the first loop where the first radiating pattern 120 is not formed, and the first radiating pattern 120 is not provided in the entry path R1 and the exit path R2.

[0038] The lower radial pattern 122 is formed on the second surface of the substrate sheet 110 and forms a second loop, which is wound multiple times on the second surface of the substrate sheet 110. The lower radial pattern 122 is connected to the upper radial pattern 121 through a plurality of through holes penetrating the substrate sheet 110.

[0039] The outer diameter of the first loop of the upper radiating pattern 121 and the second loop of the lower radiating pattern 122 is approximately 38Φ.

[0040] A second radiating pattern 130 is formed on the first surface of the substrate sheet 110. The second radiating pattern 130 enters the inner periphery of the first loop of the first radiating pattern 120 through the inlet path R1, forming an inner loop in the inner periphery region of the first loop. After forming the inner loop, the second radiating pattern 130 exits to the outside of the first loop of the first radiating pattern 120 through the outlet path R2. After exiting to the outside of the first loop, the second radiating pattern 130 forms a third loop by repeatedly winding around the first surface of the substrate sheet 110.

[0041] Through-holes penetrating the first magnet array 140 and the second magnet array 150 are formed on the substrate sheet 110. The first through-hole and the second through-hole are formed on the substrate sheet 110. The first and second through-holes are formed at a predetermined distance from the outer periphery of the loop formed by the first radiation pattern 120. In this case, for example, the first and second through-holes are spaced approximately 1 mm from the outer periphery of the first radiation pattern 120.

[0042] The first magnet array 140 is configured with a plurality of magnets arranged in a ring arc. One end of the first magnet array 140 is disposed on the first surface and the second surface of the first substrate sheet 110 through a first through-hole penetrating the substrate sheet 110. The first magnet array 140 is disposed along the outer periphery of the first radiation pattern 120 and includes a plurality of first magnet units 141 forming a ring arc. The first magnet unit 141 is configured to include an S-pole permanent magnet 142 disposed spaced apart from the outer periphery of the first radiation pattern 120 and an N-pole permanent magnet 143 disposed spaced apart from the outer periphery of the first radiation pattern 120 and disposed between the S-pole permanent magnet 142 and the outer periphery of the first radiation pattern 120.

[0043] The second magnet array 150 is configured with a plurality of magnets arranged in a ring-shaped arc. One end of the second magnet array 150 is disposed on the first surface and the second surface of the first substrate sheet 110 through a second through-hole penetrating the substrate sheet 110. The second magnet array 150 is disposed along the outer periphery of the first radiation pattern 120 and includes a plurality of second magnet units 151 forming a ring-shaped arc. The second magnet unit 151 is configured to include an S-pole permanent magnet 152 disposed spaced apart from the outer periphery of the first radiation pattern 120 and an N-pole permanent magnet 153 disposed spaced apart from the outer periphery of the first radiation pattern 120 and disposed between the S-pole permanent magnet 152 and the outer periphery of the first radiation pattern 120.

[0044] The first magnet array 140 is arranged counterclockwise along the outer periphery of the first radiation pattern 120 from a position adjacent to the entrance path R1 of the first radiation pattern 120 to a position adjacent to the exit path R2. The second magnet array 150 is arranged counterclockwise along the outer periphery of the first radiation pattern 120 from a position adjacent to the exit path R2 of the first radiation pattern 120 to a position adjacent to the entrance path R1. In this case, the two ends of the first magnet array 140 and the second magnet array 150 are set to face each other and spaced apart from each other, forming the entrance path R1 and the exit path R2 of the second radiation pattern 130.

[0045] Reference Figure 4 The first magnet array 140 and the second magnet array 150 form a ring shape, wherein N-pole permanent magnets 143 and 153 are disposed inside, while S-pole permanent magnets 142 and 152 are disposed outside the first magnet array 140 and the second magnet array 150. In this case, the N-pole permanent magnets 143 and 153 and the S-pole permanent magnets 142 and 152 constituting the first magnet array 140 and the second magnet array 150 are formed into an arc shape with an angle of approximately 20 degrees. The inner circumferential diameter d1 of the annular arc formed by the first magnet array 140 and the second magnet array 150 is approximately 38 mm, and the outer circumferential diameter d2 of the annular shape is approximately 46 mm.

[0046] The S-pole permanent magnets 142 and 152 and the N-pole permanent magnets 143 and 153 constituting the first electrode unit and the second electrode unit have a width of about 3 mm and a thickness of about 300 μm-400 μm.

[0047] The shielding sheet 200 is a plate-shaped material formed of magnetic material having a first surface and a second surface, and is laminated on the second surface of the substrate sheet 110.

[0048] If the shielding sheet 200 overlaps with the first magnet array 140 and the second magnet array 150, the shielding sheet 200 may be magnetically saturated (magnetized) by the magnetic fields generated by the N-pole permanent magnets 143 and 153 and the S-pole permanent magnets 142 and 152, thus the shielding performance may be reduced, or antenna characteristics such as inductance and charging efficiency may be altered.

[0049] Accordingly, the antenna module according to the present invention can prevent the shielding sheet 200 from being magnetically saturated (magnetized) by the magnet mounted on the substrate sheet 110 by punching the portion of the shielding sheet 200 that overlaps with the magnet in the entire region, thereby preventing the reduction of the shielding performance of the antenna module and the deterioration of characteristics such as inductance or charging efficiency.

[0050] In other words, referencing Figure 5 Anti-overlap holes are formed in the areas of the shielding sheet 200 that overlap with the first magnet array 140 and the second magnet array 150 of the substrate sheet 110. That is, anti-overlap holes are formed by removing (punching) the areas of the shielding sheet 200 that overlap with the first magnet array 140 and the second magnet array 150.

[0051] A first anti-overlap hole 210 corresponding to the first magnet array 140 and a second anti-overlap hole 220 corresponding to the second magnet array 150 are formed on the shielding sheet 200. The first anti-overlap hole 210 can overlap with a first through hole formed on the substrate sheet 110, and the second anti-overlap hole 220 can overlap with a second through hole formed on the substrate sheet 110.

[0052] Meanwhile, the antenna module may also include a protective sheet 300 laminated on the first surface of the substrate sheet 110 and a heat-diffusing sheet 400 laminated on the second surface of the shielding sheet 200. The thickness of the first radiation pattern 120 and the thickness (or number of layers) of the shielding sheet 200 can be appropriately selected according to the thickness of the first magnet array 140 and the second magnet array 150.

[0053] Reference Figure 6 The first magnet array 140 and the second magnet array 150 are housed in anti-overlap holes. Specifically, a portion of the first magnet array 140 is housed in a first through-hole of the substrate sheet 110, while the remaining portion (the end of the first magnet array 140 penetrating the first through-hole) is housed in a first anti-overlap hole 210 of the shielding sheet 200. Similarly, a portion of the second magnet array 150 is housed in a second through-hole of the substrate sheet 110, while the remaining portion (the end of the second magnet array 150 penetrating the second through-hole) is housed in a second anti-overlap hole 220 of the shielding sheet 200.

[0054] Reference Figure 7The first anti-overlapping hole 210 and the second anti-overlapping hole 220 can form openings 500a and 500b between the first magnet array 140 and the second magnet array 150 and the heat diffusion sheet 400. That is, the first opening 500a is formed at the end of the first magnet array 140, between the first anti-overlapping hole 210 and the heat diffusion sheet 400, while the second opening 500b is formed at the end of the second magnet array 150, between the second anti-overlapping hole 220 and the heat diffusion sheet 400.

[0055] Reference Figure 8 and 9 Depending on the desired characteristics of the substrate sheet 110, there may be regions S1 on the substrate sheet 110 where the second radiation pattern 130 is not formed. That is, the second radiation pattern 130 may be formed only adjacent to the inner peripheral region of the first radiation pattern 120 and two adjacent sides of the substrate sheet 110. In this case, the regions overlapping with the regions where the second radiation pattern 130 is not formed can be partially removed from the shielding sheet 200.

[0056] As described above, although preferred embodiments of the present invention have been described, it should be understood that various modifications can be made, and those skilled in the art can make various modification examples and correction examples without departing from the scope of the claims of the present invention.

Claims

1. An antenna module, characterized in that, include: Antenna sheet having a radiating pattern formed thereon and a magnet array formed along the outer periphery of the radiating pattern; as well as A shielding sheet is laminated onto the antenna sheet and has anti-overlap holes formed in the region overlapping with the magnet array. The magnet array is inserted into the antenna sheet. The antenna sheet includes: A substrate sheet having a first through hole and a second through hole formed thereon; A first radiating pattern is formed on the substrate sheet and is formed in a loop shape having an inlet path and an outlet path; The second radiating pattern is formed on the substrate sheet and is configured to enter the inner peripheral region of the first radiating pattern through the inlet path to form an inner loop, and is disposed outside the first radiating pattern through the outlet path. A first magnet array, configured to penetrate the first through-hole and disposed along the outer periphery of the first radial pattern; and The second magnet array is configured to be spaced apart from the first magnet array and penetrate the second through-hole, and is disposed along the outer periphery of the first radiation pattern.

2. The antenna module according to claim 1, characterized in that, The magnet array includes a plurality of magnet units arranged in a ring-shaped arc along the outer periphery of the radiation pattern. The magnet unit includes: An S-pole permanent magnet, configured to be spaced apart from the outer periphery of the radiating pattern; and An N-pole permanent magnet is disposed between the outer periphery of the radiating pattern and the S-pole permanent magnet.

3. The antenna module according to claim 1, characterized in that, The first radiation pattern includes: An upper radial pattern is formed on the first surface of the substrate sheet; and A lower radiating pattern is formed on the second surface of the substrate sheet and connected to the upper radiating pattern through a through-hole penetrating the substrate sheet; The upper radiating pattern is formed as a loop shape having the inlet path and the outlet path.

4. The antenna module according to claim 1, characterized in that, The first magnet array and the second magnet array are arranged such that their ends face each other and are spaced apart from each other, and are configured as an inlet path and an outlet path to form the second radiation pattern.

5. The antenna module according to claim 1, characterized in that, The shielding sheet includes: A first anti-overlap hole is formed within the area of ​​the shielding sheet, overlapping with the first magnet array; and The second anti-overlap hole is formed in the area of ​​the shielding sheet and overlaps with the second magnet array.

6. The antenna module according to claim 5, characterized in that, The first magnet array is housed in the first anti-overlap hole by penetrating the antenna sheet, and the second magnet array is housed in the second anti-overlap hole by penetrating the antenna sheet.

7. The antenna module according to claim 5, characterized in that, It also includes a heat-diffusing sheet laminated on the shielding sheet. The first anti-overlap hole is configured to form a first opening between the first magnet array and the heat diffusion sheet; The second anti-overlapping hole is configured to form a second opening between the second magnet array and the heat-diffusing sheet.

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