Antenna module with both NFC and WPC and electronic equipment

Abstract

The utility model provides an antenna module with both NFC and WPC and electronic equipment. The antenna module comprises a first antenna which comprises a first coil used for executing NFC communication and a second coil used for executing WPC, and the first coil and the second coil surround the same axis to form the first antenna; the second antenna comprises a radiator used for executing NFC communication, and preset distances exist between the radiator and the first coil and between the radiator and the second coil; and the control switching assembly is connected with a power line of the second coil so as to detect whether the second coil is in a power supply state, select the second antenna to execute NFC communication when the second coil is detected to be in the power supply state, and select the first antenna to execute NFC communication when the second coil is not in the power supply state. According to the invention, frequency interference on the NFC function in the wireless charging process can be avoided.

Description

Technical Field

[0001] This application relates to the fields of wireless charging and RFID (Radio Frequency Identification) communication technology, specifically to an antenna module and electronic device that combines NFC and WPC. Background Technology

[0002] NFC (Near Field Communication) is a short-range RFID wireless communication technology that allows electronic devices to exchange data using inductive readers, inductive cards, or peer-to-peer communication. Therefore, it is widely used in mobile payments, electronic ticketing, and identity authentication. With the increasing prevalence of wireless charging technology and the growing trend of highly integrated electronic products, combining NFC functionality with WPC (Wireless Power Consortium) functionality has become a trend. However, the operating frequency of NFC and the frequency of wireless charging may interfere with each other, especially affecting NFC performance during wireless charging. Utility Model Content

[0003] In view of this, this application provides an antenna module and electronic device that combines NFC and WPC, which can improve the problem of frequency interference to NFC function during wireless charging.

[0004] The antenna module that combines NFC and WPC provided in this application includes:

[0005] The first antenna includes a first coil for performing NFC communication and a second coil for performing WPC, the first coil and the second coil forming the first antenna around the same axis;

[0006] The second antenna includes a radiator for performing NFC communication, the radiator having a predetermined distance from the first coil and the second coil;

[0007] A control switching component is connected to the power line of the second coil to detect the power supply status of the second coil and select either the first antenna or the second antenna to perform NFC communication based on the power supply status.

[0008] Optionally, the first antenna and the second antenna are stacked.

[0009] Optionally, the first antenna and the second antenna are arranged side by side or opposite to each other.

[0010] Optionally, the feed points of the first coil and the second coil are set independently, the first coil is provided with a first feed point and a second feed point, and the second antenna is provided with a third feed point; the third feed point and the second feed point are connected.

[0011] Optionally, the antenna module further includes a sensing circuit connected to the power line of the second coil and the control switching component.

[0012] Optionally, the control switching component includes a current transformer.

[0013] Optionally, the first coil and the second coil are disposed in the same plane, and the first antenna is a plate-type component.

[0014] Optionally, the second antenna is at least one of a single-ended antenna, a differential antenna, and a laser-engraved antenna.

[0015] This application provides an electronic device, including a body and an antenna module assembled on the body that combines NFC and WPC as described in any of the preceding claims.

[0016] Optionally, the body can switch between a first form and a second form. In the first form, the first antenna and the second antenna are arranged side by side or opposite to each other. In the second form, the first antenna and the second antenna are stacked.

[0017] As described above, the antenna module designed in this application includes two antennas: a first antenna (which can be considered a two-in-one antenna) and a second antenna (which can be considered a single antenna). Both antennas have NFC functionality. The control switching component detects whether the WPC coil (i.e., the second coil that performs WPC) is in a powered state. When it is detected that the coil is in a powered state (i.e., wireless charging is in progress), the single antenna is selected to perform NFC communication. When the coil is not in a powered state (i.e., wireless charging is not in progress), the two-in-one antenna is selected to perform NFC communication. In this way, frequency interference caused by the wireless charging process to the NFC function can be avoided. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an antenna module provided in an embodiment of this application;

[0019] Figure 2 This is a schematic diagram of the structure of the first electronic device provided in the embodiments of this application;

[0020] Figure 3 This is a schematic diagram of the structure of the second type of electronic device provided in the embodiments of this application.

[0021] Figure 4 This is a schematic diagram of the structure of the third electronic device provided in the embodiments of this application.

[0022] First antenna 1, second antenna 2, control switching component 3;

[0023] First coil 11, second coil 12, power line 120, shaft O, radiator 20;

[0024] First feed point 111, second feed point 112, feed point 121, third feed point 221, fourth feed point 222;

[0025] Electronic device 100, main body 101, bending line 102. Detailed Implementation

[0026] To address the aforementioned technical problems in the prior art, the antenna module and electronic device combining NFC and WPC in this application are equipped with two antennas: a dual-antenna and a single antenna. Both antennas have NFC functionality. The switching component detects whether the WPC coil is powered on. When the WPC coil is powered on (i.e., wireless charging is in progress), the single antenna is selected to perform NFC communication, and when the WPC coil is not powered on (i.e., wireless charging is not in progress), the dual-antenna is selected to perform NFC communication. This avoids frequency interference to the NFC function caused by the wireless charging process.

[0027] The specific form of the shape, quantity, size, and other parameters of any of the antenna, coil, radiator, and control switching components can be determined according to the adaptability required by the actual scenario, and this application does not limit it.

[0028] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly described below in conjunction with specific embodiments and corresponding drawings. Obviously, the embodiments described below are only a part of the embodiments of this application, and not all of them. Unless otherwise specified, the following embodiments and their technical features can be combined with each other, and also belong to the technical solutions of this application.

[0029] In the description of the embodiments of this application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the technical solutions of the corresponding embodiments, and are not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limitations on this application.

[0030] Please see Figure 1As shown, the antenna module in this embodiment includes a first antenna 1, a second antenna 2, and a control switching component 3. It should be understood that, as a component that can be manufactured, transported, and sold independently, the antenna module also contains the necessary components of a known antenna module, which are not all described in this application.

[0031] The first antenna 1 is a dual-mode antenna, including a first coil 11 and a second coil 12. The first coil 11 is used to perform NFC communication, and the second coil 12 is used to perform WPC. The first coil 11 and the second coil 12 can be arranged around the same axis O to form the first antenna 1. Figure 1 In one example, the first coil 11 and the second coil 12 are disposed on the same plane, making the first antenna 1 have a planar structure or a sheet-like component, which occupies less space. In other examples, the first coil 11 and the second coil 12 may not be disposed on the same plane; for example, they may be stacked one on top of the other, with partial overlap or no overlap at all.

[0032] In a scenario where the first coil 11 and the second coil 12 are positioned on the same plane, such as... Figure 1 As shown, each turn of the first coil 11 can be disposed within the second coil 12. Alternatively, in other examples, the first coil 11 and the second coil 12 can intersect each other, that is, one or more turns of the second coil 12 are disposed between any two adjacent turns of the first coil 11. It should be noted that adjacent turns are electrically insulated from each other.

[0033] The second antenna 2 includes a radiator 20 for performing NFC communication, and the radiator 20 can be, for example, Figure 1 The coil structure shown can also be a sheet metal part or a radiating element of other shapes. The radiator 20 has a predetermined distance from the first coil 11 and the second coil 12.

[0034] exist Figure 1 In the example, the first antenna 1 and the second antenna 2 are stacked vertically. The preset distance is expressed as follows: the radiator 20 is stacked vertically with the first antenna 1. In the stacking direction, the radiator 20 has a non-zero distance between itself and the first coil 11, and a non-zero distance between itself and the second coil 12.

[0035] In other examples, the radiator 20 of the second antenna 2 may be located in the same plane as the first antenna 1, whereby the first antenna 1 and the second antenna 2 are arranged side by side or opposite to each other. The radiator 20 has a non-zero preset distance between itself and the first coil 11 in this plane, and also has a non-zero preset distance between itself and the second coil 12 in this plane.

[0036] The control switching component 3 is connected to the power line 120 of the second coil 12 to detect whether the second coil 12 is in a powered state, and to select the second antenna 2 to perform NFC communication when it is detected that it is in a powered state, and to select the first antenna 1 to perform NFC communication when it is not in a powered state.

[0037] In one example, the control switching component 3 can detect whether the second coil 12 is in a powered state by detecting whether there is an induced current. When the second coil 12 sends an electromagnetic induction with the induction coil of the wireless charger (not shown), the second coil 12 will generate an induced current. At this point, the control switching component 3 can determine that the second coil 12 is in a powered state or in an operating state. If no induced current is detected, the control switching component 3 determines that the second coil 12 is not in a powered state.

[0038] Optionally, the antenna module may include a sensing circuit connected to the power supply line 120 of the second coil 12 and also connected to the control switching component 3. The sensing circuit detects whether the second coil 12 generates an induced current and transmits this information to the control switching component 3.

[0039] In a real-world scenario, the control switching component 3 may include a current transformer, which acts as a switch that conducts the circuit by inducing current.

[0040] As described above, the antenna module designed in this application includes two antennas, namely a dual-antenna 1 and a single antenna 2. Both antennas have NFC functionality. The control switching component 3 detects whether the WPC coil (i.e., the second coil 12 that performs WPC) is in a powered state. When it is detected that it is in a powered state (i.e., wireless charging is in progress), the single antenna 2 is selected to perform NFC communication, and when it is not in a powered state (i.e., wireless charging is not in progress), the dual-antenna 1 is selected to perform NFC communication. In this way, frequency interference caused by the wireless charging process to the NFC function can be avoided.

[0041] The second antenna 2 can be considered as an additional antenna added to the related dual-antenna 1, and can specifically be at least one of a single-ended antenna, a differential antenna, and a laser-direct structuring (LDS) antenna. For the specific structure of each type of antenna, please refer to the structural design of related technologies in this field.

[0042] The working principle and process of the antenna module are as follows:

[0043] Step S101: Field strength wake-up detection;

[0044] If the field strength of the combined antenna 1 or the single antenna 2 meets the wake-up conditions, the antenna module will be switched from sleep mode to active mode.

[0045] Step S102: Determine whether the device is in wireless charging mode;

[0046] If the wireless charging coil (i.e., the second coil 12) is not in operation, proceed to step S103, receive an NFC command, for example, from a reader / writer using the dual-antenna 1, and select the dual-antenna 1 to transmit an NFC signal in response to the NFC command. If the wireless charging coil (i.e., the second coil 12) is in operation, proceed to step S104, receive an NFC command, for example, from a reader / writer using the single antenna 2, and select the single antenna 2 to transmit an NFC signal in response to the NFC command.

[0047] Step S105: Determine whether the sleep conditions are met; if they are met, end the communication and enter the sleep state; if they are not met, return to step S102 and continue to check whether the wireless charging state is in progress.

[0048] In current card-swiping processes, when using a wireless charging coil, if only the two-in-one antenna 1 is available, the wireless charging base can interfere with the NFC signal reading, leading to NFC communication failure. However, the implementation method of this application, by determining the operating state of the wireless charging coil and then selecting the appropriate antenna, avoids frequency interference to the NFC function during wireless charging. Furthermore, when selecting a single antenna 2, a preset distance is maintained between the single antenna 2 and the wireless charging coil, ensuring a preset distance between the single antenna 2 and the wireless charging base. This eliminates the adverse effects of the wireless charging base on the NFC signal, reducing the risk of NFC communication failure.

[0049] The feed points of the first coil 11 and the second coil 12 can be set independently, such as... Figure 1 As shown, the first coil 11 has a first feed point 111 and a second feed point 112, the second coil 12 has two feed points 121, and the second antenna 2 may have a third feed point 221 and a fourth feed point 222; the third feed point 221 may be connected to the second feed point 112. When in wireless charging mode, the first coil 11 and the second antenna 2 can jointly function as an NFC antenna to perform NFC communication. In one example, the third feed point 221 may completely overlap with the second feed point 112 or be connected via a trace to achieve the connection.

[0050] This application also provides an electronic device, combined with... Figure 2 and Figure 3 As shown, the electronic device 100 includes a body 101 and an antenna module assembled on the body 101. The antenna module can be any of the antenna modules described above, and therefore has the beneficial effects of any of the aforementioned examples.

[0051] This application does not limit the specific form of the electronic device. Figure 2 Taking the flat-screen mobile phone shown as an example, the antenna module can be assembled in the cavity enclosed by the body 101. The first antenna 1 can be set in the lower half of the electronic device 100 and adjacent to the back cover of the body 101, and the second antenna 2 can be set in the top of the electronic device 100. Figure 3 Taking the flat-screen mobile phone shown as an example, the antenna module can be assembled in the cavity enclosed by the body 101. The first antenna 1 can be set in the lower half of the electronic device 100 and adjacent to the back cover of the body 101, and the second antenna 2 can be set in the upper half of the electronic device 100 and adjacent to the back cover of the body 101.

[0052] This antenna module can also be applied to foldable electronic devices, where the main body 101 can switch between a first form and a second form. In the first form, the first antenna 1 and the second antenna 2 are arranged side-by-side or opposite to each other; in the second form, the first antenna 1 and the second antenna 2 are stacked. Figure 4 Taking the foldable screen phone shown as an example, the antenna module can be assembled within the cavity enclosed by the main body 101. Figure 4 In the first configuration shown, the first antenna 1 and the second antenna 2 are arranged side by side along the direction of the flat screen, or in other words, they are arranged opposite each other along the bend line 102. When switching to the second configuration along the bend line 102, the first antenna 1 and the second antenna 2 are stacked along the thickness direction.

[0053] The above description is only a part of the embodiments of this application and does not limit the patent scope of this application. For those skilled in the art, any equivalent structural transformations made using the content of this specification and drawings are similarly included within the patent protection scope of this application.

[0054] Although this document uses terms such as "first," "second," etc., to describe various types of information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. Furthermore, the singular forms "a," "an," and "the" are intended to also include the plural forms. The terms "or" and "and / or" are interpreted as inclusive, or meaning either one or any combination thereof. Exceptions to this definition only arise when combinations of elements, functions, steps, or operations are inherently mutually exclusive in some way.

Claims

1. An antenna module combining NFC and WPC, characterized in that, include: The first antenna includes a first coil for performing NFC communication and a second coil for performing WPC, the first coil and the second coil forming the first antenna around the same axis; The second antenna includes a radiator for performing NFC communication, the radiator having a predetermined distance from the first coil and the second coil; The control switching component is connected to the power line of the second coil to detect whether the second coil is in a powered state, and to select the second antenna to perform NFC communication when the second coil is detected to be in a powered state, and to select the first antenna to perform NFC communication when the second coil is not in a powered state.

2. The antenna module according to claim 1, characterized in that, The first antenna and the second antenna are stacked.

3. The antenna module according to claim 1, characterized in that, The first antenna and the second antenna are arranged side by side or opposite to each other.

4. The antenna module according to any one of claims 1 to 3, characterized in that, The feed points of the first coil and the second coil are set independently. The first coil is provided with a first feed point and a second feed point, and the second antenna is provided with a third feed point; the third feed point is connected to the second feed point.

5. The antenna module according to claim 1, characterized in that, The antenna module also includes a sensing circuit, which is connected to the power line of the second coil and the control switching component.

6. The antenna module according to claim 5, characterized in that, The control switching component includes a current transformer.

7. The antenna module according to claim 1, characterized in that, The first coil and the second coil are disposed on the same plane, and the first antenna is a plate-type component.

8. The antenna module according to claim 1, characterized in that, The second antenna is at least one of a single-ended antenna, a differential antenna, and a laser-engraved antenna.

9. An electronic device, characterized in that, It includes a body and an antenna module that combines NFC and WPC as described in any one of claims 1 to 8, assembled on the body.

10. The electronic device according to claim 9, characterized in that, The main body can switch between a first form and a second form. In the first form, the first antenna and the second antenna are arranged side by side or opposite to each other. In the second form, the first antenna and the second antenna are stacked.

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