Antenna module and wireless charging device

Abstract

The utility model provides a kind of antenna module and wireless charging equipment, the antenna module includes wireless charging coil wiring and nanocrystal component, the wireless charging coil wiring is located above the nanocrystal component, the nanocrystal component is in laminated arrangement, including first nanocrystal layer, second nanocrystal layer, third nanocrystal layer and fourth nanocrystal layer, the fourth nanocrystal layer is annularly arranged, the wireless charging coil wiring is located in the annular ring area of the fourth nanocrystal layer.The antenna module and wireless charging equipment of the utility model not only facilitate magnetic field coupling, improve charging efficiency, but also can improve antenna inductance, reduce line resistance.

Description

Technical Field

[0001] This utility model relates to the field of communication technology, and in particular to an antenna module and a wireless charging device using the antenna module. Background Technology

[0002] The emergence of wireless charging, especially wireless charging technology represented by electromagnetic induction, has brought convenience to consumers. Currently, most high-end smartphones support wireless charging, allowing users to easily charge their phones without the constraints of wires. Furthermore, the high power output of wireless charging on various smartphones significantly reduces charging time, providing a superior user experience. However, due to the large charging area of ​​the wireless charging antenna, it is currently placed between the phone's battery and back cover. This can lead to increased thickness or reduced battery space, impacting the user experience. Therefore, wireless charging must balance short charging times with maintaining a slim profile.

[0003] Currently, most mobile phone wireless charging antennas in the industry use a solution that combines several layers of nanocrystals with circuit layers. In order to achieve better charging performance, the nanocrystals are usually larger than the circuit layers of the antenna, which results in a significant waste of space in the non-circuit areas.

[0004] In view of this, it is indeed necessary to propose a novel antenna module and a wireless charging device using the antenna module. Utility Model Content

[0005] The purpose of this invention is to provide an antenna module that not only facilitates magnetic field coupling and improves charging efficiency, but also increases antenna inductance and reduces line resistance.

[0006] To solve the above-mentioned technical problems, this utility model provides an antenna module, which includes a wireless charging coil trace and a nanocrystal component. The wireless charging coil trace is located above the nanocrystal component. The nanocrystal component is arranged in a stacked manner, including a first nanocrystal layer, a second nanocrystal layer, a third nanocrystal layer and a fourth nanocrystal layer. The fourth nanocrystal layer is arranged in a ring, and the wireless charging coil trace is located within the ring area of ​​the fourth nanocrystal layer.

[0007] As a further improvement of this utility model, the nanocrystalline component is square in shape, and the first nanocrystalline layer, the second nanocrystalline layer, the third nanocrystalline layer and the fourth nanocrystalline layer are stacked in sequence, and the cross-sections of the first nanocrystalline layer, the second nanocrystalline layer, the third nanocrystalline layer and the fourth nanocrystalline layer are all square.

[0008] As a further improvement of this invention, the middle position of the fourth nanocrystalline layer is configured as a circular hole region.

[0009] As a further improvement of this utility model, the wireless charging coil trace is configured as a circular wireless charging coil trace that is connected to the circular hole of the fourth nanocrystalline layer.

[0010] As a further improvement of this utility model, fillers are provided between the first nanocrystalline layer and the second nanocrystalline layer, between the second nanocrystalline layer and the third nanocrystalline layer, and between the third nanocrystalline layer and the fourth nanocrystalline layer to connect the nanocrystalline layers to each other.

[0011] As a further improvement of this utility model, the filler between the first nanocrystalline layer and the second nanocrystalline layer, the filler between the second nanocrystalline layer and the third nanocrystalline layer, and the filler between the third nanocrystalline layer and the fourth nanocrystalline layer are all configured as adhesive backing.

[0012] As a further improvement of this utility model, an insulating layer is provided between the wireless charging coil trace and the fourth nanocrystalline layer to isolate the wireless charging coil from the fourth nanocrystalline layer.

[0013] As a further improvement of this utility model, the diameter of the circular hole is larger than that of the wireless charging coil trace.

[0014] As a further improvement of this utility model, the diameter of the circular hole ranges from 10mm to 30mm.

[0015] The purpose of this invention is to provide a wireless charging device to better utilize the aforementioned antenna module.

[0016] To solve the above-mentioned technical problems, this utility model provides a wireless charging device, which includes the aforementioned antenna module.

[0017] This invention provides an antenna module and a wireless charging device. The antenna module includes a wireless charging coil trace and a nanocrystalline component. The wireless charging coil trace is located above the nanocrystalline component, which is arranged in a stacked manner, including a first nanocrystalline layer, a second nanocrystalline layer, a third nanocrystalline layer, and a fourth nanocrystalline layer. The fourth nanocrystalline layer is arranged in a ring, and the wireless charging coil trace is located within the ring area of ​​the fourth nanocrystalline layer. This invention's antenna module and wireless charging device not only facilitate magnetic field coupling and improve charging efficiency but also increase antenna inductance and reduce line resistance. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the antenna module of this utility model.

[0019] Figure 2 This is a cross-sectional view of the nanocrystalline component of this utility model.

[0020] Figure 3 This is a schematic diagram of the antenna module of this utility model.

[0021] Figure 4 The diagrams show the structural schematic and magnetic field effect simulation of a traditional antenna module, as well as the structural schematic and magnetic field effect simulation of the antenna module of this invention.

[0022] The labels in the attached figures are explained as follows:

[0023] Wireless charging coil 10, nanocrystalline component 20, first nanocrystalline layer 21, second nanocrystalline layer 22, third nanocrystalline layer 23, fourth nanocrystalline layer 24, filler 30. Detailed Implementation

[0024] The antenna module and wireless charging device proposed in this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the explanation of the embodiments of this utility model. Furthermore, the structures shown in the drawings are often part of the actual structure. In particular, different proportions may be used in different drawings to illustrate different aspects.

[0025] The emergence of wireless charging, especially wireless charging technology represented by electromagnetic induction, has brought convenience to consumers. High-end smartphones now support wireless charging, allowing users to easily charge their phones and freeing them from the constraints of wires. However, due to the large area of ​​the wireless charging antenna, it can currently only be placed between the phone battery and the back cover, which increases the phone's thickness or reduces battery space, affecting the user experience. Currently, mobile phone wireless charging antennas typically use two to four layers of nanocrystalline composites combined with the circuitry layer. This invention, considering thickness and antenna performance, uses nanocrystalline composites that are much larger than the antenna circuitry layer for better magnetic field performance; that is, the non-circuitry area only contains nanocrystalline composites. This results in wasted thickness space in the non-circuitry area.

[0026] This invention provides an antenna module for use in wireless charging devices. The antenna module includes a wireless charging coil 10 trace and a nanocrystalline component 20. The wireless charging coil 10 trace is located above the nanocrystalline component 20. The nanocrystalline component 20 is arranged in a stacked manner, including a first nanocrystalline layer 21, a second nanocrystalline layer 22, a third nanocrystalline layer 23, and a fourth nanocrystalline layer 24. The fourth nanocrystalline layer 24 is arranged in a ring, and the wireless charging coil 10 trace is located within the ring area of ​​the fourth nanocrystalline layer 24.

[0027] This design not only facilitates magnetic field coupling and improves charging efficiency in the antenna module and wireless charging device of this invention, but also increases antenna inductance and reduces line resistance. In other words, the wireless charging coil 10 is surrounded by nanocrystals, which promotes magnetic field coupling, improves charging efficiency, shortens charging time, and thus enhances the user experience. Furthermore, the antenna module of this invention can increase antenna inductance, which, with the same inductance, allows for shorter wiring of the wireless charging coil 10, thereby reducing line resistance and charging losses.

[0028] Furthermore, the nanocrystalline component 20 is square in shape, with the first nanocrystalline layer 21, the second nanocrystalline layer 22, the third nanocrystalline layer 23, and the fourth nanocrystalline layer 24 stacked sequentially. The cross-sections of the first nanocrystalline layer 21, the second nanocrystalline layer 22, the third nanocrystalline layer 23, and the fourth nanocrystalline layer 24 are all square. The square design of the nanocrystalline component 20 of this invention makes its structure more compact, effectively utilizes space, and avoids wasted thickness in non-circuit areas. At the same time, this square design also allows for a tighter fit between the nanocrystalline component 20 and the wiring of the wireless charging coil 10, further improving the magnetic field coupling effect.

[0029] Furthermore, the fourth nanocrystalline layer 24 is configured with a circular hole region in its center. This design not only reduces the weight of the nanocrystalline component 20 but also facilitates heat dissipation, improving the stability and durability of the antenna module. The wireless charging coil 10 is configured as a circular trace that connects to the circular hole in the fourth nanocrystalline layer 24. Simultaneously, the circular hole design makes installation of the wireless charging coil 10 trace more convenient, improving production efficiency. This design ensures a more secure connection between the wireless charging coil 10 trace and the nanocrystalline component 20, preventing displacement or detachment during use and further enhancing the reliability of the antenna module.

[0030] Specifically, fillers 30 are provided between the first nanocrystalline layer 21 and the second nanocrystalline layer 22, between the second nanocrystalline layer 22 and the third nanocrystalline layer 23, and between the third nanocrystalline layer 23 and the fourth nanocrystalline layer 24 to connect the nanocrystalline layers. Preferably, the fillers 30 between the first nanocrystalline layer 21 and the second nanocrystalline layer 22, between the second nanocrystalline layer 22 and the third nanocrystalline layer 23, and between the third nanocrystalline layer 23 and the fourth nanocrystalline layer 24 are all configured as adhesive backing. The choice of filler 30 has a significant impact on the performance of the antenna module. This invention preferably uses adhesive backing as filler 30, as it has good adhesion and high-temperature resistance, effectively ensuring the connection strength and stability between the nanocrystalline layers.

[0031] Furthermore, an insulating layer is provided between the wireless charging coil 10 traces and the fourth nanocrystalline layer 24 to isolate the wireless charging coil 10 from the fourth nanocrystalline layer 24. In other words, this design prevents current from directly passing through the fourth nanocrystalline layer 24, thereby ensuring the safety and stability of wireless charging. It effectively avoids direct contact between the two, thus preventing short circuits or other electrical faults. In addition, the insulating layer also serves to fix the wireless charging coil 10 traces, preventing them from shifting or falling off during use, further improving the reliability and durability of the antenna module.

[0032] Furthermore, the diameter of the circular hole is larger than the wiring of the wireless charging coil 10. Preferably, the diameter of the circular hole is in the range of 10mm-30mm. This setting ensures sufficient space for the installation and adjustment of the wireless charging coil 10 wiring, while also ensuring the processing accuracy and assembly quality of the antenna module during manufacturing. By reasonably setting the diameter range of the circular hole, the antenna module can maintain performance while also possessing good manufacturability and assemblability, thereby improving production efficiency. Figure 4 The figures show simulation diagrams of the magnetic field effect of antenna components in traditional wireless charging and the magnetic field effect of antenna modules in this invention. By comparing the two figures, it can be seen that the wireless charging magnetic field radiation effect of the antenna module of this invention is better.

[0033] Same line layer Ordinary nanocrystal stacking The invention is nanocrystalline L(uH) 3.55uH 3.7uH Coupling coefficient 80％ 81％

[0034] In summary, this utility model provides an antenna module and a wireless charging device. The antenna module includes a wireless charging coil 10 trace and a nanocrystalline component 20. The wireless charging coil 10 trace is located above the nanocrystalline component 20. The nanocrystalline component 20 is arranged in a stacked manner, including a first nanocrystalline layer 21, a second nanocrystalline layer 22, a third nanocrystalline layer 23, and a fourth nanocrystalline layer 24. The fourth nanocrystalline layer 24 is arranged in a ring, and the wireless charging coil 10 trace is located within the ring area of ​​the fourth nanocrystalline layer 24. This utility model's antenna module and wireless charging device not only facilitate magnetic field coupling and improve charging efficiency but also increase antenna inductance and reduce line resistance.

[0035] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to mutually. In addition, the different parts between embodiments can also be combined with each other, and this utility model does not limit this.

[0036] The above description is only a description of the preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. An antenna module, characterized in that: The antenna module includes a wireless charging coil trace and a nanocrystal assembly. The wireless charging coil trace is located above the nanocrystal assembly. The nanocrystal assembly is arranged in a stacked manner, including a first nanocrystal layer, a second nanocrystal layer, a third nanocrystal layer, and a fourth nanocrystal layer. The fourth nanocrystal layer is arranged in a ring, and the wireless charging coil trace is located within the ring area of ​​the fourth nanocrystal layer.

2. The antenna module according to claim 1, characterized in that: The nanocrystalline component is square in shape, with the first nanocrystalline layer, the second nanocrystalline layer, the third nanocrystalline layer, and the fourth nanocrystalline layer stacked sequentially, and the cross-sections of the first nanocrystalline layer, the second nanocrystalline layer, the third nanocrystalline layer, and the fourth nanocrystalline layer are all square.

3. The antenna module according to claim 2, characterized in that: The fourth nanocrystalline layer is configured with a circular hole region in the middle.

4. The antenna module according to claim 3, characterized in that: The wireless charging coil trace is configured as a circular wireless charging coil trace that is connected to the circular hole of the fourth nanocrystalline layer.

5. The antenna module according to claim 4, characterized in that: A filler is provided between the first nanocrystalline layer and the second nanocrystalline layer, between the second nanocrystalline layer and the third nanocrystalline layer, and between the third nanocrystalline layer and the fourth nanocrystalline layer to connect the nanocrystalline layers to each other.

6. The antenna module according to claim 5, characterized in that: The fillers between the first and second nanocrystalline layers, between the second and third nanocrystalline layers, and between the third and fourth nanocrystalline layers are all configured as adhesive backings.

7. The antenna module according to claim 6, characterized in that: An insulating layer is provided between the wireless charging coil trace and the fourth nanocrystalline layer to isolate the wireless charging coil from the fourth nanocrystalline layer.

8. The antenna module according to claim 7, characterized in that: The diameter of the circular hole is larger than the wireless charging coil trace.

9. The antenna module according to claim 8, characterized in that: The diameter of the circular hole ranges from 10mm to 30mm.

10. A wireless charging device, characterized in that: The wireless charging device includes the antenna module as described in any one of claims 1-9.

Images