An antenna and electronic device

Abstract

Embodiments of the present application provide an antenna and an electronic device, and relate to the technical field of electronic devices. The scheme can improve the NFC radiation performance of the top area of the electronic device by reasonably designing the NFC module and the NFC antenna in the NFC module. The antenna comprises a coil part and a metal frame, the coil part is provided with at least two breakpoints, and each breakpoint corresponds to connecting two ports. The at least two breakpoints include a breakpoint connected to the metal frame through at least one port.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of electronic devices, and in particular to an antenna and an electronic device. BACKGROUND

[0002] Currently, some electronic devices can provide a near field communication function for users through a near field communication (NFC) module arranged therein.

[0003] For example, the near field communication function can include a data transmission function such as "one touch transmission".

[0004] Based on the usage habits of most users, when holding the electronic device, the electronic device needs to provide better NFC radiation capability in the top region to facilitate the user to use the electronic device for data transmission based on the NFC function.

[0005] In the existing NFC module, due to the design limitations of the NFC antenna, the radiation capability of the NFC antenna in the top region of the electronic device is weak, which is not conducive to the use of the NFC function by the user. SUMMARY

[0006] The present application provides an antenna and an electronic device, which improves and guarantees the NFC radiation performance in the top region of the electronic device by reasonably designing the NFC module and the NFC antenna in the NFC module.

[0007] To achieve the above technical purpose, the present application adopts the following technical solutions:

[0008] In a first aspect, an antenna is provided for use in an electronic device, the antenna comprising: a coil portion and a metal frame, the coil portion being provided with at least two breakpoints, each breakpoint corresponding to connecting two ports. The at least two breakpoints include a breakpoint connected to the metal frame through at least one port.

[0009] In this way, the coil portion and the metal frame portion can be used together as an antenna for radiation. Since the metal frame is arranged on the outer edge of the electronic device, the radiation of the metal frame can effectively improve the radiation performance including the top region.

[0010] Optionally, when the antenna is in operation, the current direction in at least part of the coil in the coil portion is the same as the current direction on the metal frame.

[0011] In this way, the example explicitly states that the current direction in at least part of the coil in the coil portion is the same as the current direction on the metal frame. This can ensure that the coil portion and the metal frame can produce a positive superposition effect when radiating, thereby improving the radiation performance of the top region.

[0012] Optionally, the coil part is made of a flexible printed circuit board (FPC).

[0013] Optionally, the coil part is attached to the inner side of the back cover of the electronic device.

[0014] In this way, an arrangement and a preparation method of the coil part are provided.

[0015] Optionally, the metal frame includes one or more metal frames, and the metal frame includes a top frame arranged at the top edge of the electronic device.

[0016] In this way, it is clear that the metal frame can include a top frame. Thus, by simultaneously radiating through the top frame and the coil part, the radiation effect of the top region can be effectively improved.

[0017] Optionally, the current direction of at least part of the coils on the coil part is the same as the current direction on the metal frame, including that the current direction of the coils close to the top edge of the electronic device on the coil part is the same as the current direction on the metal frame.

[0018] In this way, the position of the coils with the same current direction as the metal frame in the coil part is clear. Thus, the current direction in the top region is consistent, thereby improving the radiation performance of the top region.

[0019] Optionally, the at least two breakpoints of the coil part further include a breakpoint provided with a feeding point, and the feeding point is used to input an NFC signal to the coil part.

[0020] In this way, the feeding method of the coil part is clear.

[0021] Optionally, the at least two breakpoints on the coil part include a first breakpoint and a second breakpoint, two ends of the first breakpoint are respectively connected with a first port and a second port, and two ends of the second breakpoint are respectively connected with a third port and a fourth port.

[0022] The first breakpoint is connected with the metal frame through the first port and / or the second port. Alternatively, the two ports of the first breakpoint are respectively connected with a reference ground.

[0023] The third port and the fourth port of the second breakpoint are respectively configured as the feeding point.

[0024] In this way, the connection logic of the two breakpoints on the coil part is clear. Subsequently, different specific examples will be described to limit.

[0025] Optionally, the electronic device is further provided with a first matching circuit, a second matching circuit, and an NFC chip.

[0026] The third port of the second breakpoint is connected with the second port of the first matching circuit, the first port of the first matching circuit is connected with the first port of the NFC chip, the fourth port of the second breakpoint is connected with the third port of the second matching circuit, and the fourth port of the second matching circuit is connected with the second port of the NFC chip. The NFC chip outputs an NFC signal as a differential signal through the first port and the second port of the NFC chip.

[0027] In this way, the connection logic of the analog signal (such as a matching circuit) providing a feeding signal for the NFC chip and the baseband signal (such as the NFC chip) is determined.

[0028] Optionally, the first breakpoint is connected with the metal frame through the first port and / or the second port.

[0029] The metal frame comprises a first frame, and the first frame is provided with a first electrical connection point and a second electrical connection point. The first port of the first breakpoint is connected with the first electrical connection point on the first frame, and the second port of the first breakpoint is connected with the reference ground.

[0030] The second electrical connection point on the first frame is connected with the reference ground.

[0031] In this way, the connection logic of the coil part and the metal frame is provided.

[0032] Optionally, the first breakpoint is connected with the metal frame through the first port and / or the second port.

[0033] The metal frame comprises a second frame, and the second frame is provided with a third electrical connection point and a fourth electrical connection point. The first port of the first breakpoint is connected with the third electrical connection point on the second frame, and the second port of the first breakpoint is connected with the fourth electrical connection point on the second frame.

[0034] In this way, another connection logic of the coil part and the metal frame is provided.

[0035] Optionally, the first breakpoint is connected with the metal frame through the first port and / or the second port.

[0036] The third electrical connection point and the fourth electrical connection point on the second frame are respectively arranged at two ends of the second frame.

[0037] The second frame further comprises a fifth electrical connection point, and the fifth electrical connection point is arranged at a position different from the third electrical connection point or the fourth electrical connection point. The fifth electrical connection point is connected with the reference ground.

[0038] In this way, another connection logic of the coil part and the metal frame is provided.

[0039] Optionally, the first breakpoint is connected to the metal frame through the first port and / or the second port.

[0040] The metal frame comprises a third frame and a fourth frame, two ends of the third frame are respectively provided with a sixth electric connection point and a seventh electric connection point, two ends of the fourth frame are provided with an eighth electric connection point and a ninth electric connection point.

[0041] The seventh electric connection point and the eighth electric connection point are oppositely arranged.

[0042] The seventh electric connection point and the eighth electric connection point are respectively connected to the reference ground.

[0043] The first port of the first breakpoint is connected to the sixth electric connection point on the third frame, and the second port of the first breakpoint is connected to the ninth electric connection point on the fourth frame.

[0044] In this way, another connection logic of the coil part and the metal frame is provided.

[0045] Optionally, the first breakpoint is connected to the metal frame through the first port and / or the second port.

[0046] The metal frame comprises a fifth frame and a sixth frame, one end of the fifth frame is provided with a tenth electric connection point, the fifth frame is further provided with an eleventh electric connection point, and two ends of the sixth frame are respectively provided with a twelfth electric connection point and a thirteenth electric connection point.

[0047] The end where the tenth electric connection point is located is away from the sixth frame. The end where the twelfth electric connection point is located is close to the fifth frame.

[0048] The eleventh electric connection point and the thirteenth electric connection point are respectively connected to the reference ground.

[0049] The first port of the first breakpoint is connected to the tenth electric connection point on the fifth frame, and the first port of the first breakpoint is further connected to the twelfth electric connection point on the sixth frame.

[0050] In this way, another connection logic of the coil part and the metal frame is provided.

[0051] Optionally, the two ports of the first breakpoint are respectively connected to the reference ground.

[0052] The metal frame comprises a seventh frame, the seventh frame is provided with a fourteenth electric connection point and a fifteenth electric connection point, and the fifteenth electric connection point is connected to the reference ground.

[0053] The third port of the second breakpoint is connected to the fourteenth electric connection point.

[0054] In this way, another connection logic of the coil part and the metal frame is provided.

[0055] Optionally, the metal frame is further configured to perform a first communication, the first communication comprising any one of: cellular communication, WIFI communication, Bluetooth communication.

[0056] A filter component is arranged on a connecting line between the coil part and the metal frame, the filter component being configured to allow NFC signal transmission between the coil part and the metal frame, and further configured to prevent signal of the first communication from flowing into the coil part.

[0057] In this way, it is clear that the metal frame used by the antenna can also be used for communication of other systems. Through this implementation, the same metal frame can be multiplexed by multiple systems, increasing the flexibility of antenna design in electronic devices.

[0058] Optionally, in the case where at least one electrical connection point and / or port is connected with the reference ground, the at least one electrical connection point and / or port is connected with the reference ground through an adjustment component. The adjustment component comprises at least one of: a capacitor, an inductor, a resistor.

[0059] The adjustment component is configured to adjust the difference between the first inductance and the second inductance to be no more than 50% of the first inductance or the second inductance.

[0060] The first inductance is the inductance between the second port of the first matching circuit and the reference ground to which the second port is connected on the antenna. The second inductance is the inductance between the third port of the second matching circuit and the reference ground to which the third port is connected on the antenna.

[0061] In this way, an example of a scheme for improving NFC performance is provided. In this implementation, by adding an adjustment component to the path connected with the reference ground, the first inductance and the second inductance are adjusted, and the link corresponding to the second port of the first matching circuit is close to the mirror image of the link corresponding to the third port of the second matching circuit. Thus, the requirement of the NFC chip is better met, and the radiation performance of the NFC module is improved.

[0062] In other designs, the adjustment of the first inductance and / or the second inductance can also be achieved by adjusting the number of turns of the coil part, adding a compensation line to the coil part, etc.

[0063] In a second aspect, an electronic device is provided. The electronic device is configured with an antenna as provided in the first aspect and any of the possible designs thereof.

[0064] It can be understood that the scheme provided in the second aspect of the present application can correspond to the first aspect and any of the possible designs thereof, and thus the beneficial effects achieved are similar, which will not be described here again. BRIEF DESCRIPTION OF DRAWINGS

[0065] Figure 1 A schematic diagram of a communication scenario for embodiments of the application;

[0066] Figure 2 A logical diagram of an electronic device for embodiments of the application;

[0067] Figure 3 A schematic diagram of an NFC module for embodiments of the application;

[0068] Figure 4 A schematic diagram of an NFC antenna for embodiments of the application;

[0069] Figure 5 A side view schematic diagram of an electronic device for embodiments of the application;

[0070] Figure 6 A schematic diagram of a magnetic field simulation for embodiments of the application;

[0071] Figure 7 A position schematic diagram of a metal decoration on an electronic device for embodiments of the application;

[0072] Figure 8 A schematic diagram of a metal middle frame for embodiments of the application;

[0073] Figure 9 A logical diagram of an NFC module for embodiments of the application;

[0074] Figure 10 A schematic diagram of a compensation process for embodiments of the application;

[0075] Figure 11 A logical diagram of an electrical connection for embodiments of the application;

[0076] Figure 12 A comparison schematic diagram of an NFC module and a metal decoration for embodiments of the application;

[0077] Figure 13 A comparison schematic diagram of another NFC module and a metal decoration for embodiments of the application;

[0078] Figure 14 A logical diagram of another NFC module for embodiments of the application;

[0079] Figure 15 A logical diagram of another electrical connection for embodiments of the application;

[0080] Figure 16A control diagram of the NFC module and the metal decoration part provided by another embodiment of the present application;

[0081] Figure 17 A control diagram of the NFC module and the metal decoration part provided by another embodiment of the present application;

[0082] Figure 18 A logic diagram of the NFC module provided by another embodiment of the present application;

[0083] Figure 19 A control diagram of the NFC module and the metal decoration part provided by another embodiment of the present application;

[0084] Figure 20 A control diagram of the NFC module and the metal decoration part provided by another embodiment of the present application;

[0085] Figure 21 A logic diagram of the NFC module provided by another embodiment of the present application;

[0086] Figure 22 A control diagram of the NFC module and the metal decoration part provided by another embodiment of the present application;

[0087] Figure 23 A control diagram of the NFC module and the metal decoration part provided by another embodiment of the present application;

[0088] Figure 24 A logic diagram of the NFC module provided by another embodiment of the present application;

[0089] Figure 25 A control diagram of the NFC module and the metal decoration part provided by another embodiment of the present application;

[0090] Figure 26 A control diagram of the NFC module and the metal decoration part provided by another embodiment of the present application;

[0091] Figure 27 A logic diagram of the NFC module provided by another embodiment of the present application;

[0092] Figure 28 A control diagram of the NFC module and the metal decoration part provided by another embodiment of the present application;

[0093] Figure 29 A control diagram of the NFC module and the metal decoration part provided by another embodiment of the present application;

[0094] Figure 30 A logic diagram of the NFC module provided by another embodiment of the present application;

[0095] Figure 31 A comparison schematic diagram of another NFC module and metal decoration provided by an embodiment of the application;

[0096] Figure 32 A comparison schematic diagram of another NFC module and metal decoration provided by an embodiment of the application;

[0097] Figure 33 A logic schematic diagram of another NFC module provided by an embodiment of the application;

[0098] Figure 34 A comparison schematic diagram of another NFC module and metal decoration provided by an embodiment of the application;

[0099] Figure 35 A comparison schematic diagram of another NFC module and metal decoration provided by an embodiment of the application;

[0100] Figure 36 A logic schematic diagram of another NFC module provided by an embodiment of the application;

[0101] Figure 37 A comparison schematic diagram of another NFC module and metal decoration provided by an embodiment of the application;

[0102] Figure 38 A comparison schematic diagram of another NFC module and metal decoration provided by an embodiment of the application;

[0103] Figure 39 A logic schematic diagram of a matching circuit provided by an embodiment of the application. DETAILED DESCRIPTION

[0104] Hereinafter, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" can explicitly or implicitly include one or more of the features. In the description of the embodiments, unless otherwise specified, the meaning of "plurality" is two or more.

[0105] With the development of communication technology, electronic devices can provide users with more diverse communication experiences.

[0106] In some scenarios, two electronic devices can conveniently realize mutual transmission of data.

[0107] For example, referring to Figure 1 A schematic diagram of a communication scenario provided by an embodiment of the application.

[0108] In Figure 1In the example, two electronic devices are Device 1 and Device 2.

[0109] When the heads of two electronic devices are close to each other, Device 1 and Device 2 can transmit data including pictures, videos and documents via wireless communication.

[0110] Should Figure 1 The transmission function shown can also be called "one-touch transmission".

[0111] In some implementations, this "one-touch transfer" function can be based on a near-field communication (NFC) module set up in the electronic device.

[0112] For example, both Device 1 and Device 2 can be equipped with NFC modules. Therefore, when Device 1 and Device 2 are close to each other, they can transmit data through their respective NFC modules, achieving a "one-touch transfer" function.

[0113] In other scenarios, NFC modules can also be used to simulate card functions, function as card readers, and so on.

[0114] refer to Figure 2 This is a logical schematic diagram of an electronic device provided in an embodiment of this application.

[0115] Generally, the NFC module in an electronic device can be configured in, for example... Figure 2 The upper half shown corresponds to the upper half of the electronic device, which provides better NFC communication capabilities.

[0116] In this application, the upper part of the electronic device can refer to one side of the vertical line of the long side of the electronic device, and this upper part can include modules such as cameras. When the user normally holds the electronic device, this upper part can be the part facing the sky.

[0117] Correspondingly, when a user is holding an electronic device normally, the side of the electronic device that is closest to the sky can be the top side.

[0118] Taking a mobile phone as an example, the top edge of the phone can be the short edge closest to the camera. The bottom edge, opposite the top edge, can be the short edge with a Universal Serial Bus (USB) interface.

[0119] This is like Figure 2 The setup shown ensures that the NFC signal is not obstructed by the user's hand when the electronic device is held in their hand. This facilitates better NFC wireless communication capabilities when the electronic device is held in the user's hand.

[0120] The following provides an exemplary description of the NFC module.

[0121] refer to Figure 3 This is a schematic diagram of an NFC module provided in an embodiment of this application.

[0122] In this example, such as Figure 3 As shown, the NFC module may include an NFC chip, matching circuit 1 and matching circuit 2, and an NFC antenna.

[0123] The NFC chip provides baseband processing capabilities for NFC signals. Matching circuits 1 and 2 provide matching modulation capabilities for the input / output signals, ensuring that the amplitude and / or phase of the input / output signals match the requirements of the NFC chip. Matching modulation can include impedance modulation and / or inductance modulation. Furthermore, the NFC antenna is used to convert analog signals into electromagnetic waves for radiation.

[0124] exist Figure 3 In the example, the NFC chip can be configured with two ports, such as port B1 and port B2. Matching circuit 1 and matching circuit 2 can each be configured with two ports. For example, matching circuit 1 can be configured with ports M11 and M12. Matching circuit 2 can be configured with ports M21 and M22. The NFC antenna can be configured with ports A1 and A2. Ports A1 and A2 can also be referred to as the feed points of the NFC antenna.

[0125] like Figure 3 As shown, port B1 of the NFC chip can be connected to port M11 of the matching circuit 1, port M12 of the matching circuit 1 can be connected to port A1 of the NFC antenna, port A2 of the NFC antenna can be connected to port M22 of the matching circuit 2, and port M21 of the matching circuit 2 can be connected to port B2 of the NFC chip.

[0126] The two feed points of the NFC antenna can be electrically connected. This allows signals flowing in through port A1 to also flow out through port A2. Alternatively, signals flowing in through port A2 can also flow out through port A1.

[0127] It should be noted that, in this application, the connection between ports may include a communication connection. Based on this communication connection, analog signal transmission can be realized between the ports.

[0128] When the NFC module is working, at the same time, the signals transmitted by ports B1 and B2 of the NFC chip can be differential signals with equal amplitude and opposite phase.

[0129] For example, at certain times, the signal transmitted by port B1 has a positive phase, while the signal transmitted by port B2 has a negative phase. Correspondingly, the signal transmitted by port B1 flows out of the NFC chip, and the signal transmitted by port B2 flows into the NFC chip.

[0130] It should be noted that the signals transmitted between the two ports of the NFC chip can be time-varying sine wave signals. Thus, at certain moments, such as... Figure 3 As shown, port B1 can transmit positive-phase signals, and port B2 can transmit negative-phase signals. At other times, port B1 can also transmit negative-phase signals, and port B2 can also transmit positive-phase signals.

[0131] Taking port B1 as an example, which outputs a positive-phase signal and port B2 as an input of a negative-phase signal.

[0132] The signal output from port B1 can be input to matching circuit 1 through port M11. After matching processing by matching circuit 1, the signal can be input to the NFC antenna through port A1 for radiation.

[0133] In addition, the NFC antenna can also input signals to the matching circuit 2 via port M22. After matching processing by the matching circuit 2, the signal can be input to the NFC chip via port B2.

[0134] This allows for the cyclical transmission of signals within the NFC module, enabling normal transmission and reception of NFC signals.

[0135] refer to Figure 4 This is a schematic diagram of an NFC antenna provided in an embodiment of this application.

[0136] exist Figure 4 In the example, the NFC antenna can be configured using a multi-turn coil. Figure 4 In the example, the coil has 3 turns. In other implementations, the NFC antenna coil can have other integers greater than or equal to 1.

[0137] like Figure 4 As shown, the NFC coil can be connected to port A2 via a jumper after three turns of the coil, with port A1 as one end. This allows for electrical connection between ports A1 and A2 through the three turns of the coil.

[0138] As a concrete example, this is as follows Figure 4 The NFC antenna shown can be configured using a flexible printed circuit board (FPC). The coil can be configured using metal traces (such as copper or silver) within the FPC. This NFC antenna implemented using an FPC can also be referred to as an FPC coil.

[0139] In other examples, the NFC coil can also be configured using other processes. This application does not limit this. For example, the NFC coil can be configured by setting copper wires or applying silver paste. Furthermore, the NFC coil can be configured using laser direct structuring (LDS), steel sheet injection molding, or other methods.

[0140] by Figure 4 Taking the NFC antenna shown as an example, the larger the surrounding area of ​​the NFC antenna, the larger the effective magnetic flux coverage area of ​​the NFC antenna. The corresponding NFC antenna has better radiation performance.

[0141] In some embodiments, the wrapping area of ​​the NFC antenna can be the area of ​​the inner region surrounded by the outermost coil of the multi-turn coil. In other embodiments, the wrapping area of ​​the NFC antenna can be the area of ​​the inner region surrounded by the innermost coil of the multi-turn coil.

[0142] Taking the NFC antenna configured via an FPC coil as an example. (Reference) Figure 5 This is a side view of an electronic device provided in an embodiment of this application.

[0143] From a side view, a decorative element (Deco) may be prominently displayed on the back cover of the electronic device. This decorative element is typically made of metal and provides protection for the protruding portion of the rear camera module.

[0144] If the electronic device is equipped with an NFC module, the FPC coil can be attached to the upper half of the inside of the phone's back cover.

[0145] Therefore, when the NFC module is working, the magnetic current generated by the NFC antenna can radiate from the location of the NFC antenna to the back of the electronic device.

[0146] refer to Figure 6 This is a schematic diagram of a magnetic field simulation provided in an embodiment of this application. This example provides... Figure 5 The diagram shows a simulation of the magnetic field of an NFC antenna in a typical design. In this example, the projection of a metal decorative element onto one side of the display screen at least partially overlaps with the NFC antenna.

[0147] In Figure 6 In the examples, darker colors correspond to stronger magnetic fields and better NFC communication performance. Lighter colors correspond to weaker magnetic fields and worse NFC communication performance.

[0148] It can be seen that when the NFC antenna works, most of the magnetic field is concentrated in the area close to the center of the electronic device away from the top, and the magnetic field strength of the top area of the electronic device is weak. Correspondingly, the electronic device can provide better NFC radiation performance in the area behind, and the NFC radiation performance in the top area is poor. In addition, due to the shielding of the metal decoration, the NFC radiation performance in the area coinciding with the projection of the metal decoration is also poor.

[0149] The following Table 1 also provides the corresponding card reading distance test results of the electronic device as a card reader for the conventional design shown in Figure 5

[0150] Table 1

[0151]

[0152] As shown in Table 1, in the conventional design, the card reading distance of the electronic device as a card reader is 20mm for an ID card, 25mm for a TagV, 44mm for a Type1 card, 54mm for a Type2 card, 24mm for a bus card, and 31mm for a bank card.

[0153] In combination with the description in Figure 5 and Figure 6 , in the conventional design, when the NFC antenna radiates, the area with better radiation performance is behind the electronic device. In combination with the scenario example in Figure 1 , in the "one-touch transmission" and other scenarios, it is often necessary for the NFC antenna to provide better radiation performance in the top area of the electronic device. Therefore, in order to meet the communication needs of the "one-touch transmission" and other scenarios, the conventional NFC antenna design needs to be improved in order to obtain better NFC radiation performance in the top area of the electronic device.

[0154] In addition, in combination with the example in Figure 5 , a decoration of metal material, referred to as a metal decoration, can be generally arranged near the NFC antenna.

[0155] Due to the electrodynamic characteristics of metal materials, the existence of the metal decoration often has an impact on the radiation of the NFC antenna.

[0156] Referring to Figure 7 , a schematic diagram of the position of a metal decoration on an electronic device is provided by an embodiment of the present application.

[0157] As shown in Figure 7 , in some cases, the metal decoration 1 can be located on one side of the back of the electronic device. In other cases, the metal decoration 2 can be located in the middle of the back of the electronic device.

[0158] ​In addition, the shape of the metal decoration part can be different in different implementations.

[0159] In summary, in order to meet the NFC communication requirements such as "one-touch transmission", the NFC antenna in the electronic device needs to provide good radiation capability in the top area of the electronic device under different metal decoration part configuration scenarios.

[0160] Based on this, the antenna scheme provided by the embodiments of the present application can be applied in an electronic device. The electronic device can include a metal frame.

[0161] In the NFC module provided by the present application, the radiator of the NFC antenna can include a coil part and at least part of the metal frame. The at least part of the metal frame can be the metal frame at the top of the electronic device (i.e. the top metal frame, or the top frame).

[0162] In this way, the signal on the NFC antenna can be radiated through the coil part and the top frame, thereby significantly improving the current intensity at the top of the electronic device, and further improving the magnetic field intensity of the NFC antenna in the top area of the electronic device. Thus, good NFC radiation performance is provided in the top area of the electronic device.

[0163] In the specific design process, the embodiments of the present application further improve the radiation performance of the NFC antenna through current direction control of the coil part and the metal frame part, inductance control on the signal flow path, and other means.

[0164] Since the radiation is performed through the coil part and the top frame, the surrounding area of the NFC antenna is significantly improved, and the NFC module provided by the embodiments of the present application can also be applied to different metal decoration part configuration scenarios.

[0165] The schemes provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0166] It should be noted that the electronic device in the embodiments of the present application can include at least one of a mobile phone, a foldable electronic device, a tablet computer, a desktop computer, a laptop computer, a handheld computer, a notebook computer, an ultra-mobile personal computer (UMPC), a netbook, a cellular phone, a personal digital assistant (PDA), an augmented reality (AR) device, a virtual reality (VR) device, an artificial intelligence (AI) device, a wearable device, an in-vehicle device, a smart home device, or a smart city device. The embodiments of the present application do not specially limit the specific type of the electronic device.

[0167] In the present application, the electronic device can have a structure of a metal frame.

[0168] As an example, reference is made to Figure 8 , a schematic diagram of a metal middle frame provided by the embodiments of the present application.

[0169] In the present example, the electronic device is stacked from the thickness direction and can include a display screen, a metal middle frame, and a back cover.

[0170] In Figure 8 the example of the metal middle frame shown, the metal middle frame can include a metal middle plate and a metal frame.

[0171] The metal middle plate can be fixed in the metal frame. The metal middle plate can provide rigid support for the electronic device, and the metal middle plate can also provide a zero potential reference for each electronic component in the electronic device.

[0172] The metal frame can include multiple segments. Each segment of the metal frame is separated by a gap. Some metal frames can be fixedly connected to the metal middle plate by a metal material. Some metal frames can be fixed to the metal middle frame by a non-metal material. The metal frame located at the top is the top frame.

[0173] In some antenna designs, the top frame can be used as or multiplexed as an antenna radiator, thereby achieving the setting of the antenna.

[0174] As an example, the antenna using the top frame as the radiator can include one or more of a cellular antenna, a WIFI antenna, and a Bluetooth antenna.

[0175] In addition, the electronic device involved in the NFC module provided by the embodiments of the present application can also be configured with an NFC module as shown in Figure 3 .

[0176] In a particular implementation, the radiator of the NFC antenna in the NFC module can include a coil portion and a top bezel.

[0177] The coil portion can include at least one turn of metal coil. For example, the coil portion can be implemented by FPC, LDS, steel sheet injection, etc.

[0178] In some embodiments, the coil portion can also be arranged in cooperation with a magnetic material. For example, a continuous or discontinuous magnetic material can be arranged below the coil portion or between the coil portion and the metal component of the electronic device. In this way, the magnetic radiation capability of the coil portion is enhanced by the characteristic of the magnetic material to concentrate the magnetic field. For example, the magnetic material can include at least one of ferrite, nanocrystalline, resin composite material, etc.

[0179] The top bezel can include any one of the metal bezels in Figure 8 at least part of the metal bezel at the top.

[0180] The NFC module provided by the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0181] Reference Figure 9 is a logical schematic diagram of the NFC module provided by the embodiments of the present application.

[0182] The Figure 9 provides an example of the matching circuit 1 and the matching circuit 2 in the NFC module, as well as the NFC chip. The Figure 9 provides an example of a specific composition of the NFC antenna.

[0183] As shown in Figure 9 , the connection form of the matching circuit 1 and the matching circuit 2, the NFC chip, and the feeding point of the NFC antenna can refer to the description in Figure 3 , which will not be repeated here.

[0184] It should be noted that in the embodiments of the present application, only examples in the accompanying drawings are provided, and do not constitute a specific limitation on the actual scheme. For example, Figure 9 , the port A12 and the port A11 as the feeding point are arranged at the side of the coil portion. In other examples, the port A12 and / or the port A11 can also be arranged at the top or bottom edge of the coil portion or other positions. For another example, Figure 9 , the coil portion is arranged in a rectangular shape. In other examples, the wire shape of the coil portion can also be different from the example in Figure 9 . Other embodiments are similar and will not be repeated one by one.

[0185] As shown in Figure 9As shown, in this example, the NFC antenna may include a coil portion and a top bezel. Figure 9 The top border in the example can also be referred to as the first border.

[0186] In this example, the coil section can be formed by multiple turns of coil. Unlike Figure 4 As explained in the description, in this example, the coil section may include at least two breakpoints. Each breakpoint corresponds to two electrical connection points.

[0187] For example, breakpoint 1 is configured with ports A11 and A12 corresponding to the power supply point.

[0188] Breakpoint 2 corresponds to two ports. At least one of these two ports is connected to the metal frame.

[0189] For example, one of the two ports corresponding to breakpoint 2 can be connected to port A13. The other of the two ports corresponding to breakpoint 2 can be connected to port A14.

[0190] It should be noted that, in the embodiments of this application, the breakpoint 2 can be set on the inner coil, the outer coil, or the middle coil of the coil part. The specific position can be flexibly configured and there is no limitation thereto.

[0191] In this application, at least one port in breakpoint 2 can be connected to the metal frame.

[0192] For example, one port of breakpoint 2 can be connected to the electrical connection point C11 of the metal frame (such as the top frame) via port A13. For instance, port A13 can be connected to the electrical connection point C11 of the metal frame via a metal conductive component such as a metal spring or metal foam.

[0193] In Figure 9 In the example, another port in breakpoint 2 can be connected to the reference ground via port A14.

[0194] like Figure 9 As shown, another electrical connection point C12 on the metal frame, different from electrical connection point C11, can also be connected to the reference ground.

[0195] exist Figure 9 In other examples, breakpoint 2 can also be called the first breakpoint, port A13 can also be called the first port of the first breakpoint, and port A14 can also be called the second port of the first breakpoint.

[0196] Correspondingly, the Figure 9 In the example, electrical connection point C11 on the metal frame can be the first electrical connection point on the first frame. Electrical connection point C12 on the metal frame can be the second electrical connection point on the first frame.

[0197] It can be understood that the greater the distance between the electrical connection point C11 and the electrical connection point C12 on the metal frame, the greater the size of the top frame for NFC signal radiation, which can enable the NFC antenna to achieve better radiation performance in the top area of the electronic device. In some examples, the length of the metal frame between the electrical connection point C11 and the electrical connection point C12 can be not less than 1 mm.

[0198] In this way, based on the NFC module as shown in Figure 9 When the NFC chip is working, the signal can flow out from the port B1, pass through the matching circuit 1, and flow into the coil part of the NFC antenna from the port A11. The signal can also flow into the metal frame from the port A13 connected by the breakpoint 2, and then return to the ground through the electrical connection point C12 of the metal frame.

[0199] It can be understood that the reference ground area in the electronic device is not too large, so the signal returned to the ground by the electrical connection point C12 will not be quickly attenuated. At least part of the signal can reflow into the coil part of the NFC antenna from the port A14 through the reference ground. Further, the signal can flow out of the NFC antenna from the port A12 through the transmission of the coil part. The signal can also flow into the NFC chip from the port B1 through the port M22 and the matching circuit 2.

[0200] Thus, the signal flow in the NFC module can be realized, and the wireless signal radiation can be realized through the coil part and the top frame of the NFC antenna.

[0201] In the present application, in the process of configuring the NFC antenna as shown in Figure 9 The current direction and / or inductance and / or impedance can also be controlled to obtain better NFC radiation performance.

[0202] In some embodiments, the control of the current direction can be realized by controlling the connection relationship of the breakpoint 2 and the metal frame.

[0203] For example, the connection relationship of the breakpoint 2 to the two ports (such as the port A13 and the port A14) connected to the electrical connection point C11 of the metal frame can be associated with the connection relationship of the port A13 / port A14 to the port B1 / port B2 of the NFC chip.

[0204] For example, the port A13 is connected to the port A11, and the port A11 is connected to the port B1. In this way, the connection relationship of the coil part and the metal frame can be configured as follows: the port A13 is connected to the electrical connection point C11 of the metal frame, and the port A14 and the electrical connection point C12 are grounded respectively.

[0205] Through the above association setting, the current direction on the metal frame is the same as the current direction on at least the wire in the coil part. Thus, the cancellation of the reverse field is reduced, and the performance is enhanced.

[0206] In some implementations, the at least the wire in the coil part can include a part of the wire close to the top edge of the coil part. In this way, through the above association setting, the current direction on the metal frame can be the same as the current direction on the part of the wire close to the top edge of the coil part. Thus, the radiation performance of the top area of the electronic device is enhanced.

[0207] In other embodiments, the first impedance can be the same as the second impedance through the reasonable selection of the matching circuit 1, the matching circuit 2, and the position of the breakpoint 2.

[0208] In some implementations, the first impedance can be the impedance of the signal transmission path between the electrical connection point C12 and the port B1. The second impedance can be the impedance of the signal transmission path between the port A14 and the port B2. Figure 9 For example, the connection relationship shown in FIG. 6. In which, the port A13 is connected with the port B1 through the port A11, and the port A14 is connected with the port B2 through the port A12.

[0209] The first impedance can be the impedance of the signal transmission path between the electrical connection point C12 and the port B1. The second impedance can be the impedance of the signal transmission path between the port A14 and the port B2.

[0210] By configuring the first impedance and the second impedance to be the same, the NFC chip can output differential signals with equal amplitude and opposite phase through the port B1 and the port B2, and then control and transmit the NFC signals.

[0211] For example, the connection relationship shown in FIG. 6. In which, the port A13 is connected with the port B1 through the port A11, and the port A14 is connected with the port B2 through the port A12. Figure 9 The signal transmission path between the electrical connection point C12 and the port B1 can include: a part between the electrical connection point C11 and the electrical connection point C12 on the metal frame, a part between the port A13 and the port A11 in the coil part, and a signal transmission path between the port A11 and the port B1.

[0212] The signal transmission path between the electrical connection point C12 and the port B1 can include: a part between the electrical connection point C11 and the electrical connection point C12 on the metal frame, a part between the port A13 and the port A11 in the coil part, and a signal transmission path between the port A11 and the port B1.

[0213] In some implementations, the position of the breakpoint 2 can be selected to adjust the impedance of the part between the port A13 and the port A11 in the coil part and the impedance of the part between the port A14 and the port A12 in the coil part, so that the first impedance is equal to the second impedance.

[0214] In some implementations, the first impedance can be equal to the second impedance by adjusting the impedance of the portion of the metal frame between the electrical connection point C11 and the electrical connection point C12.

[0215] In some implementations, the first impedance can be equal to the second impedance by adjusting at least one of the inductance, the capacitance, and the resistance in the matching circuit 1 and / or the matching circuit 2.

[0216] In some implementations, the first impedance can be equal to the second impedance by adjusting the inductance of the coil portion.

[0217] The inductance can include a first inductance and a second inductance.

[0218] For example, as shown in FIG. 6, the port A13 is connected to the port B1 through the port A11, and the port A14 is connected to the port B2 through the port A12. Figure 9 For example, as shown in FIG. 6, the port A13 is connected to the port B1 through the port A11, and the port A14 is connected to the port B2 through the port A12.

[0219] The first inductance can be the inductance of the signal transmission path between the port M12 of the matching circuit 1 and the electrical connection point C12. The second inductance can be the inductance of the signal transmission path between the port M22 of the matching circuit 2 and the port A14.

[0220] In the present example, by controlling the first inductance and the second inductance to be the same or similar, the inductance between the port B1 and the reference ground can be made the same as the inductance between the port B2 and the reference ground. This can make the signal transmission paths of the two output ports of the NFC chip more mirror-like, thereby meeting the working characteristics of the NFC chip and improving the communication performance of the NFC module. In the present application, the first inductance and the second inductance being similar can include that the difference between the first inductance and the second inductance is not more than 50% of the first inductance or the second inductance.

[0221] In some implementations, the first inductance and the second inductance can be controlled by reasonably selecting the position of the breakpoint 2 on the coil portion.

[0222] In some implementations, an adjusting component can be added at the position of any one of the connection reference grounds. For example, as shown in FIG. 6, an adjusting component is added between the port A14 and the reference ground. For another example, an adjusting component is added between the electrical connection point C12 and the reference ground. Figure 9

[0223] ​The adjustment component can include inductive, capacitive and / or resistive devices. The adjustment component can be used to adjust the first inductance and / or the second inductance. In this way, the first inductance and the second inductance are made the same or similar.

[0224] In some other implementations, the control of the first inductance and the second inductance can be achieved by performing a compensation process on the coil portion.

[0225] As an example, reference is made to Figure 10 , a schematic diagram of a compensation process provided by an embodiment of the present application.

[0226] As shown in Figure 10 , port A11 and port A13 are connected, and port A12 and port A14 are connected. The number of turns of the coil between port A11 and port A13 is 1 turn. The number of turns of the coil between port A12 and port A14 is at least 2 turns. In this way, the inductance of the coil portion between port A12 and port A14 is greater than the inductance of the coil portion between port A11 and port A13.

[0227] In this case, the inductance of the coil portion between port A12 and port A14 can be reduced by performing a compensation process on the coil between port A12 and port A14.

[0228] As an example, as shown in Figure 10 , one or more compensation lines can be provided between different turns of the at least 2 turns of the coil between port A12 and port A14. One end of the compensation line is provided on one turn, and the other end of the compensation line is provided on another turn. In this way, the inductance of the two turns of the coil is equivalent to the effect of parallel connection, thereby reducing the inductance of the coil portion between port A12 and port A14.

[0229] In some other implementations, the above-mentioned control of the current direction, inductance and / or impedance can also be achieved by reasonably setting the number of turns of the coil portion, adjusting the form of the coil trace, and the like.

[0230] In this way, based on the NFC module as shown in Figure 9 , the signal can be effectively guided to the top frame metal radiation. In some implementations, in combination with the control of the current direction, the NFC radiation range can be adjusted to the top area, thereby achieving better NFC radiation performance in the top area.

[0231] It should be noted that the above Figure 9 is taken as an example in which the top frame is suspended. In some other implementations, the top frame can include one or more grounding points or other electrical connection points, which are not limited by embodiments of the present application.

[0232] In some embodiments, when the metal frame is used for communication of other systems different from NFC, such as cellular, WIFI or Bluetooth, the metal frame can also be used to implement Figure 9 the configuration shown.

[0233] Referring to Figure 11 , a logical diagram of an electrical connection is provided for embodiments of the present application.

[0234] As Figure 11 shown, when the metal frame (such as the top frame) is used for communication of other systems, a filter component can be arranged between the coil part and the metal frame. The filter component can be used to prevent signals of other systems from flowing into the coil part, and the filter component is also used to transmit signals of the NFC frequency band onto the metal frame.

[0235] As an example, a filter component can be configured between the electrical connection point C11 and the port A13.

[0236] For example, the filter component can include a series inductance and / or a parallel capacitance.

[0237] In some implementations, the through-flow capacity of the series inductance can be above 800 mA. The values of the inductance and the capacitance can be flexibly set according to actual conditions, and embodiments of the present application do not limit this.

[0238] In some implementations, the series inductance can use a winding inductance, thereby reducing inductance loss.

[0239] It can be understood that, in the implementation of the scheme as Figure 9 shown, since the NFC signal is introduced into the top frame for radiation, on the one hand, the NFC communication performance of the NFC module in the top area can be improved, and on the other hand, the influence of the metal decoration on the NFC antenna can be reduced.

[0240] For example, referring to Figure 12 , a comparison diagram of an NFC module and a metal decoration is provided for embodiments of the present application.

[0241] In this example, taking the projection of the metal decoration to the coil part of the NFC antenna as an example, there is at least partial overlap between the coil part of the NFC antenna and the projection of the metal decoration.

[0242] In this Figure 12 example, a magnetic field simulation diagram of the NFC module in operation is also shown.

[0243] As Figure 12 shown, although the metal decoration blocks part of the coil, since the top frame participates in radiation, the magnetic field intensity in the top area is high. Therefore, better radiation performance can be obtained.

[0244] As a supplement, Table 2 below provides test results of the NFC module as a card reader in the scenario shown in Figure 12

[0245] Table 2

[0246]

[0247] As shown in Table 2, the scheme improves the radiation performance of the top area while the card reading performance does not decrease compared with the existing scheme in Table 1.

[0248] In addition, in other examples, the scheme implementation as shown in Figure 9 may also be applied to the case where the metal decoration is arranged on one side of the electronic device.

[0249] Referring to Figure 13 , another schematic diagram of the NFC module and the metal decoration provided by the embodiments of the present application is provided.

[0250] In this example, the connection and arrangement of the NFC module are the same as in the example in Figure 9 . The projection of the metal decoration to the side of the display screen can not overlap the coil part of the NFC antenna.

[0251] It can be understood that, in combination with the description in Figure 9 to Figure 12 , the NFC module provided by the embodiments of the present application can also provide better radiation performance in the top area in the scenario shown in Figure 13 . For specific analysis, reference can be made to the description in Figure 9 to Figure 12 , which will not be repeated here.

[0252] Referring to Figure 14 , a logic schematic diagram of another NFC module provided by the embodiments of the present application is provided.

[0253] Similar to the example in Figure 9 , the example in Figure 14 provides a matching circuit 1 and a matching circuit 2 in the NFC module, as well as an NFC chip. The example in Figure 14 also provides a specific example of the composition of the NFC antenna.

[0254] As shown in Figure 3 , the connection form of the matching circuit 1 and the matching circuit 2, the NFC chip, and the feed point of the NFC antenna can refer to the description in Figure 14 , which will not be repeated here.

[0255] In this example, the NFC antenna can include a coil part and a top frame. In other examples in Figure 9 , the metal frame can also be referred to as a second frame. ​

[0256] In this example, the coil part can be surrounded by a multi-turn coil. In comparison with the coil part surrounded by a single-turn coil, the coil part surrounded by a multi-turn coil can have a larger inductance. Figure 14 Similarly, the coil part can be surrounded by a multi-turn coil. Figure 9 In the implementation of the provided solution, the coil part can include at least two breakpoints. Two electrical connection points are configured for each breakpoint.

[0257] For example, breakpoint 1 is configured with port A21 and port A22 corresponding to the feeding points. Breakpoint 2 is connected with port A23 and port A24. Among them, the two ports of breakpoint 1 are connected with matching circuit 1 and matching circuit 2 respectively. The connection form can refer to the description in Figure 9 . The two ports of breakpoint 2 can be connected with electrical connection point C21 and electrical connection point C22 of the metal frame respectively.

[0258] As a possible implementation, port A23 can be connected with electrical connection point C21 of the metal frame through a metal conductive piece such as a metal spring or metal foam. Port A24 can be connected with electrical connection point C22 of the metal frame through a metal conductive piece such as a metal spring or metal foam.

[0259] Similarly, in the solution example in Figure 14 , the length of the metal frame between electrical connection point C21 and electrical connection point C22 can be not less than 1 mm, thereby ensuring the radiation performance of the top area. Figure 14

[0260] In this way, based on the NFC module as shown in Figure 14 , when the NFC chip is working, the signal can flow out from port B1, pass through matching circuit 1, and flow into the coil part of the NFC antenna from port A21. The signal can also flow into the metal frame from port A23 connected to breakpoint 2, and then flow back to the coil part through electrical connection point C22 of the metal frame and port A24.

[0261] Further, the signal can flow out from the NFC antenna through port A22 by the transmission of the coil part. The signal can also flow into the NFC chip through port M22, pass through matching circuit 2, and flow into the NFC chip from port B1.

[0262] In this way, the signal flow in the NFC module can be realized, and the radiation of the wireless signal can be realized through the coil part and the top frame of the NFC antenna.

[0263] In other examples of Figure 9 , breakpoint 2 can also be referred to as a first breakpoint, port A23 can be a first port of the first breakpoint, and port A24 can be a second port of the first breakpoint.

[0264] ​The electrical connection point C21 on the metal frame can be a third electrical connection point on the second frame, and the electrical connection point C22 on the metal frame can be a fourth electrical connection point on the second frame.

[0265] With Figure 14 Similar solutions are provided, and in the present example, the current direction can also be controlled during the process of configuring the NFC antenna as shown in Figure 11 , so as to obtain better NFC radiation performance.

[0266] In some embodiments, the control of the current direction can be achieved by controlling the connection relationship between the breakpoint 2 and the metal frame.

[0267] The connection relationship between the two ports (such as port A23 and port A24) corresponding to the breakpoint 2 and the electrical connection point C21 and the electrical connection point C22 of the metal frame can be associated with the connection relationship between the port A23 / port A24 and the port B1 / port B2 of the NFC chip.

[0268] For example, the port A23 is connected to the port A21, and the port A21 is connected to the port B1 signal. In this way, the connection relationship between the coil part and the metal frame can be configured as follows: the coil part is connected to the electrical connection point C21 of the metal frame through the port A23, and is connected to the electrical connection point C22 of the metal frame through the port A24.

[0269] Through the above association setting, the current direction on the metal frame is the same as the current direction on at least the wire in the coil part. Thus, the cancellation of the reverse field is reduced, and the performance is enhanced.

[0270] In some implementations, the at least wire in the coil part can include a part of the wire of the coil part close to the top edge. In this way, through the above association setting, the current direction on the metal frame can be the same as the current direction of the part of the wire of the coil part close to the top edge. Thus, the radiation performance of the top area of the electronic device is targetedly enhanced.

[0271] In combination with the description in Figure 14 , in some embodiments, when the metal frame is used for communication of other systems different from NFC, such as cellular, WIFI, or Bluetooth, the metal frame can also be used to achieve the configuration as shown in Figure 15 .

[0272] Referring to Figure 15 , another logical schematic diagram of electrical connection provided by the embodiments of the present application is provided.

[0273] As Figure 14As shown, when the metal frame (such as the top frame) is used for communication of other systems at the same time, a filter component can be arranged between the coil part and the metal frame. The filter component can be used to prevent the signal of other systems from flowing into the coil part, and the filter component is also used to transmit the signal of the NFC frequency band to the metal frame.

[0274] As an example, a filter component can be configured between the electrical connection point C21 and the port A23, and a filter component can also be configured between the electrical connection point C22 and the port A24.

[0275] For example, the filter component can include an inductance in series and / or a capacitance in parallel.

[0276] In some implementations, the through-flow capacity of the inductance in series can be above 800 mA. The values of the inductance and the capacitance can be flexibly set according to actual conditions, and the embodiments of the present application do not limit this.

[0277] In some implementations, the inductance in series can use a winding inductance, thereby reducing the inductance loss.

[0278] It can be understood that the scheme as shown in Figure 16 In the implementation of the scheme as shown, since the NFC signal is introduced into the top frame for radiation, on the one hand, the NFC communication performance of the NFC module in the top area can be improved, and on the other hand, the influence of the metal decoration on the NFC antenna can be reduced.

[0279] As an example, reference is made to Figure 16 , which is another contrast schematic diagram of an NFC module and a metal decoration provided by the embodiments of the present application.

[0280] In this example, taking the projection of the metal decoration to the coil part of the NFC antenna as an example, there is at least partial overlap between the projection and the coil part of the NFC antenna.

[0281] In this Figure 16 , a magnetic field simulation schematic of the NFC module in operation is also shown.

[0282] As shown in Figure 16 , although the metal decoration shields part of the coil, since the top frame participates in radiation, the magnetic field intensity in the top area is high. Therefore, better radiation performance can be obtained.

[0283] As a supplement, Table 3 below provides an example of test results when the NFC module as shown in Figure 14 performs card reading as a card reader.

[0284] Table 3

[0285]

[0286] As shown in Table 3, in the conventional design, the electronic device works as a card reader, and the card reading distance is 19mm for an ID card, 23mm for a TagV, 45mm for a Type1 card, 55mm for a Type2 card, 23mm for a bus card, and 29mm for a bank card.

[0287] Compared with the card reading effect shown in Table 1 corresponding to the prior solution, on the basis of enhancing the radiation performance of the top area by the connection of the top frame, the card reading effect of the solution shown in Table 2 is as follows: Figure 14 The solution provided in the present application does not have a significant decrease in working performance when working as a card reader.

[0288] In addition, in some other examples, the solution shown in Table 2 can also be applied to the case where the metal decoration is arranged on one side of the electronic device. Figure 17

[0289] Referring to Figure 14 , another schematic diagram of the NFC module and the metal decoration provided in the embodiments of the present application is provided.

[0290] In this example, the connection and arrangement of the NFC module are the same as those in Figure 14 to Figure 16 . The projection of the metal decoration to the side of the display screen can not overlap the coil part of the NFC antenna.

[0291] It can be understood that, in the scenario shown in Figure 17 , the NFC module provided in the embodiments of the present application can also provide good radiation performance in the top area, in combination with the description in Figure 14 to Figure 16 . For specific analysis, refer to the description in Figure 18 , which will not be repeated here.

[0292] Referring to Figure 9 , a logic schematic diagram of another NFC module provided in the embodiments of the present application is provided.

[0293] Similar to the examples in Figure 14 and Figure 18 , the example in Figure 18 provides a matching circuit 1 and a matching circuit 2 in the NFC module, and an NFC chip. The example in Figure 3 also provides a specific example of the composition of the NFC antenna.

[0294] As shown in Figure 18 , the connection form of the matching circuit 1 and the matching circuit 2, the NFC chip, and the feed point of the NFC antenna can refer to the description in Figure 9 , which will not be repeated here.

[0295] ​In this example, the NFC antenna can include a coil portion and a top bezel. In Figure 14 In some other examples, the top bezel can be referred to as a second bezel.

[0296] The coil portion can be configured as described in the examples of Figure 18 or Figure 18 above.

[0297] In this Figure 14 example, the metal bezel can be provided with an electrical connection point C31, an electrical connection point C32, and an electrical connection point C33. The electrical connection point C33 can be grounded.

[0298] In some embodiments, the grounding of the electrical connection point C33 can be determined by the communication requirements of other systems (e.g., cellular).

[0299] In this Figure 9 example, the electrical connection point C33 is between the electrical connection point C31 and the electrical connection point C32. In some other examples, the electrical connection point C31 can be between the electrical connection point C33 and the electrical connection point C32. In some other examples, the electrical connection point C32 can be between the electrical connection point C31 and the electrical connection point C33.

[0300] In this example, the port A33 of the breakpoint 2 can be connected to the electrical connection point C31. The port A34 of the breakpoint 2 can be connected to the electrical connection point C32.

[0301] Other configurations can be similar to the connection logic shown in Figure 18 and can be referred to each other and will not be described here.

[0302] It should be noted that in this example, similar to the scheme shown in Figure 18 , the part of the metal bezel that actually participates in the NFC signal radiation is the part between the electrical connection point C31 and the electrical connection point C32. In this way, the greater the distance between the electrical connection point C31 and the electrical connection point C32, the larger the size of the top bezel used for NFC signal radiation, which can enable the NFC antenna to obtain better radiation performance in the top area of the electronic device. In some examples, the length of the metal bezel between the electrical connection point C31 and the electrical connection point C32 can be not less than 1 mm.

[0303] In this way, based on the above Figure 18The NFC module shown allows signals to flow out from port B1 when the NFC chip is operating. These signals pass through matching circuit 1 and then flow into the coil section of the NFC antenna from port A31. The signal can also flow into the metal frame from port A33 (connected by breakpoint 2), and then back into the coil section of the NFC antenna via electrical connection point C32 and port A34. This signal can then exit the NFC antenna from port A32 after transmission through the coil section. Alternatively, the signal can flow into the NFC chip from port B1 via port M22, matching circuit 2.

[0304] This allows signals to flow within the NFC module, and then enables the radiation of wireless signals through the coil portion of the NFC antenna and the top bezel.

[0305] exist Figure 18 In other examples, electrical connection point C31 of the metal frame can be the third electrical connection point of the second frame, electrical connection point C32 of the metal frame can be the fourth electrical connection point of the second frame, and electrical connection point C33 of the metal frame can be the fifth electrical connection point of the second frame.

[0306] Correspondingly, breakpoint 2 can be the first breakpoint. Port A33 can be the first port of the first breakpoint, and port A34 can be the second port of the first breakpoint.

[0307] In this example, when performing such Figure 18 During the NFC antenna configuration shown, the current direction and / or inductance and / or impedance can also be controlled to obtain better NFC radiation performance.

[0308] In some embodiments, the direction of current can be controlled by controlling the connection relationship between breakpoint 2 and the metal frame.

[0309] The connection relationship between the two ports connected to breakpoint 2 (such as port A33 and port A34) and the electrical connection points C31 and C32 of the metal frame can be associated with the connection relationship between port A33 / port A34 and port B1 / port B2 of the NFC chip.

[0310] For example, port A33 is connected to port A31, and port A31 is connected to port B1 for signal connection. In this way, the connection relationship between the coil section and the metal frame can be configured as follows: connected to the metal frame electrical connection point C31 through port A33, and connected to the metal frame electrical connection point C32 through port A34.

[0311] By configuring the above-mentioned correlation, the current direction on the metal frame is made the same as the current direction on at least the traces in the coil section. This reduces the cancellation of reverse fields and enhances performance.

[0312] In some implementations, the at least one trace in the coil portion can include a portion of the trace in the coil portion close to the top edge. In this way, by the above-mentioned association, the current direction on the metal frame can be made the same as the current direction of the portion of the trace in the coil portion close to the top edge. Thus, the radiation performance of the top region of the electronic device is specifically enhanced.

[0313] In other embodiments, the first impedance can be made equal to the second impedance by matching the circuit 1, the circuit 2, and the position of the breakpoint 2.

[0314] For example, as shown in the connection relationship. The port A33 is connected to the port B1 through the port A31, and the port A34 is connected to the port B2 through the port A32. Figure 18 The first impedance can be the impedance of the signal transmission path between the electrical connection point C33 and the port B1. The second impedance can be the impedance of the signal transmission path between the electrical connection point C33 and the port B2.

[0315] By configuring the first impedance and the second impedance to be the same, the NFC chip can output differential signals with equal amplitude and opposite phase through the port B1 and the port B2, and thus control and transmission of the NFC signal.

[0316] For example, as shown in the connection relationship. The port A33 is connected to the port B1 through the port A31, and the port A34 is connected to the port B2 through the port A32.

[0317] Figure 18 For example, as shown in the connection relationship. The port A33 is connected to the port B1 through the port A31, and the port A34 is connected to the port B2 through the port A32.

[0318] The signal transmission path between the electrical connection point C33 and the port B2 can include: a portion between the electrical connection point C33 and the electrical connection point C32 on the metal frame, a portion between the port A34 and the port A32 of the coil portion, and a signal transmission path between the port A32 and the port B2.

[0319] In some implementations, the position of the breakpoint 2 can be selected to adjust the impedance of the portion between the port A33 and the port A31 of the coil portion, and the impedance of the portion between the port A34 and the port A32 of the coil portion, so that the first impedance is equal to the second impedance.

[0320] In other implementations, the positions of the electrical connection point C31 and the electrical connection point C32 on the top edge can be adjusted to adjust the impedance of the portion between the electrical connection point C31 and the electrical connection point C33 on the metal frame, and the impedance of the portion between the electrical connection point C32 and the electrical connection point C33, so that the first impedance is equal to the second impedance. In some implementations, the at least one trace in the coil portion can include a portion of the trace in the coil portion close to the top edge. In this way, by the above-mentioned association, the current direction on the metal frame can be made the same as the current direction of the portion of the trace in the coil portion close to the top edge. Thus, the radiation performance of the top region of the electronic device is specifically enhanced.

[0313] In other embodiments, the first impedance can be made equal to the second impedance by matching the circuit 1, the circuit 2, and the position of the breakpoint 2.

[0314] For example, as shown in the connection relationship. The port A33 is connected to the port B1 through the port A31, and the port A34 is connected to the port B2 through the port A32. Figure 18 The first impedance can be the impedance of the signal transmission path between the electrical connection point C33 and the port B1. The second impedance can be the impedance of the signal transmission path between the electrical connection point C33 and the port B2.

[0315] By configuring the first impedance and the second impedance to be the same, the NFC chip can output differential signals with equal amplitude and opposite phase through the port B1 and the port B2, and thus control and transmission of the NFC signal.

[0316] For example, as shown in the connection relationship. The port A33 is connected to the port B1 through the port A31, and the port A34 is connected to the port B2 through the port A32.

[0317] Figure 18 For example, as shown in the connection relationship. The port A33 is connected to the port B1 through the port A31, and the port A34 is connected to the port B2 through the port A32.

[0318] The signal transmission path between the electrical connection point C33 and the port B2 can include: a portion between the electrical connection point C33 and the electrical connection point C32 on the metal frame, a portion between the port A34 and the port A32 of the coil portion, and a signal transmission path between the port A32 and the port B2.

[0319] In some implementations, the position of the breakpoint 2 can be selected to adjust the impedance of the portion between the port A33 and the port A31 of the coil portion, and the impedance of the portion between the port A34 and the port A32 of the coil portion, so that the first impedance is equal to the second impedance.

[0320] In other implementations, the positions of the electrical connection point C31 and the electrical connection point C32 on the top edge can be adjusted to adjust the impedance of the portion between the electrical connection point C31 and the electrical connection point C33 on the metal frame, and the impedance of the portion between the electrical connection point C32 and the electrical connection point C33, so that the first impedance is equal to the second impedance.

[0321] In some implementations, the first impedance can be adjusted by adjusting at least one of the inductance, the capacitance, and the resistance in the matching circuit 1 and / or the matching circuit 2.

[0322] In some implementations, the first inductance and the second inductance can be controlled by properly selecting the position of the breakpoint 2 on the coil portion.

[0323] The inductance can include a first inductance and a second inductance.

[0324] For example, the connection relationship shown in FIG. 3 can be taken as an example. In this example, the port A33 is connected to the port B1 through the port A31, and the port A34 is connected to the port B2 through the port A32. Figure 9

[0325] The first inductance can be the inductance of the signal transmission path between the port M12 of the matching circuit 1 and the electrical connection point C33. The second inductance can be the inductance of the signal transmission path between the port M22 of the matching circuit 2 and the electrical connection point C33.

[0326] In this example, by controlling the first inductance and the second inductance to be the same or similar, the inductance between the port B1 and the reference ground can be made the same as the inductance between the port B2 and the reference ground. In this way, the signal transmission paths of the two output ports of the NFC chip can be made more mirror-like, thereby meeting the working characteristics of the NFC chip and improving the communication performance of the NFC module.

[0327] In some implementations, the first inductance and the second inductance can be controlled by properly selecting the position of the breakpoint 2 on the coil portion.

[0328] In some implementations, the first inductance and the second inductance can be controlled by properly selecting the position of the breakpoint 2 on the coil portion. Figure 10 Figure 18 In some implementations, the first inductance and the second inductance can be controlled by properly selecting the position of the breakpoint 2 on the coil portion.

[0329] In some implementations, the first inductance and the second inductance can be controlled by properly selecting the position of the breakpoint 2 on the coil portion. Figure 9

[0330] In some implementations, the first inductance and the second inductance can be controlled by properly selecting the position of the breakpoint 2 on the coil portion. ​​​

[0331] In this way, based on the NFC module as shown in Figure 14 the signal can be effectively guided to the top frame metal radiation. In some implementations, in combination with the control of the current direction, the adjustment of the NFC radiation range to the top area can be realized, and thus better NFC radiation performance can be obtained in the top area.

[0332] In combination with the description in Figure 18 and Figure 18 in the example of the Figure 19 , in the case that multiple systems multiplex the top frame for radiation, the isolation between the systems can be realized by configuring the filtering component. The multiple systems can include an NFC communication system and any other communication system.

[0333] For example, in some implementations, a filtering component can be added between the port A33 and the electrical connection point C31. In other implementations, a filtering component can be added between the port A34 and the electrical connection point C32.

[0334] For example, the filtering component can include a series inductor and / or a parallel capacitor.

[0335] In some implementations, the inrush current capacity of the series inductor can be above 800mA. The values of the inductor and the capacitor can be flexibly set according to actual conditions, and the embodiments of the present application do not limit this.

[0336] In some implementations, the series inductor can use a wire-wound inductor, thereby reducing inductor loss.

[0337] It can be understood that in the implementation of the scheme as shown in Figure 19 , since the NFC signal is introduced into the top frame for radiation, on the one hand, the NFC communication performance of the NFC module in the top area can be improved, and on the other hand, the influence of the metal decoration on the NFC antenna can be reduced.

[0338] For example, referring to Figure 19 , another contrast schematic diagram of an NFC module and a metal decoration provided by the embodiments of the present application is provided.

[0339] In this example, the projection of the metal decoration to the coil part of the NFC antenna at least partially overlaps the coil part of the NFC antenna.

[0340] In this Figure 19 , a magnetic field simulation diagram of the NFC module in operation is also shown.

[0341] For example, referring to Figure 18As shown, although the metal decorative piece partially obscures the coil, the magnetic field strength in the top region is relatively high due to the participation of the top frame in radiation. Therefore, good radiation performance can be obtained.

[0342] As a supplement, Table 4 below provides information such as Figure 18 The scenario shown illustrates the test results of the NFC module when it is used as a card reader.

[0343] Table 4

[0344]

[0345] As shown in Table 4, in this conventional design, the electronic device acts as a card reader with a reading distance of 19mm for ID cards, 25mm for TagV cards, 44mm for Type 1 cards, 51mm for Type 2 cards, 24mm for public transport cards, and 33mm for bank cards.

[0346] Compared with the card reading performance shown in Table 1 corresponding to the existing solution, this solution enhances the radiation performance of the top area by improving the connection settings of the top border. Figure 20 The provided solution did not show a significant decrease in performance when used as a card reader.

[0347] Furthermore, in other examples, this is as follows Figure 18 The solution shown can also be applied to situations where metal decorative parts are configured on one side of electronic devices.

[0348] refer to Figure 18 to Figure 19 This is a comparative schematic diagram of another NFC module and metal decorative part provided in the embodiments of this application.

[0349] In this example, the connection and configuration of the NFC module are... Figure 20 The example in [the previous section] is the same. The projection of the metal decorative piece onto one side of the display screen can be non-overlapping with the coil portion of the NFC antenna.

[0350] Understandably, in combination Figure 18 to Figure 19 The explanation in the document is as follows: Figure 9 to Figure 19 In the scenario shown, the NFC module provided in this embodiment may also provide good radiation performance in the top region. For detailed analysis, please refer to... Figure 21 The explanations in the text are omitted here.

[0351] The above Figure 18The description uses the example of reusing a single metal frame for radiation in NFC communication. In other embodiments of this application, NFC communication can also reuse multiple metal frames and combine them with the coil portion for radiation. This increases the effective radiation length of the metal frame, thereby improving the radiation performance of the top region.

[0352] refer to Figure 21 This is a logical schematic diagram of another NFC module provided in the embodiments of this application.

[0353] Similar to Figure 21 The example in the text, Figure 3 The example provided shows matching circuit 1 and matching circuit 2 in an NFC module, as well as an NFC chip. Figure 9 The example also provides a specific example of the composition of an NFC antenna.

[0354] like Figure 14 As shown, the connection configuration of matching circuit 1 and matching circuit 2, the NFC chip, and the feed point of the NFC antenna can be referenced. Figure 21 The explanations in the text are omitted here.

[0355] In this example, the NFC antenna may include a coil portion and a top bezel. The coil portion can be configured as described above. Figure 21 or Figure 21 Examples are shown in the text.

[0356] In Figure 18 In the example, the NFC antenna may include multiple metal frames. In this example, the NFC antenna includes two metal frames. At least one of the two metal frames may be the top frame. In some embodiments, the two metal frames may further include metal frames disposed on the sides, or partially disposed on the top edge, or partially disposed on the sides. This application does not impose any limitations on this.

[0357] Electrical connection points C41 and C44 can be provided on one of the metal frames. Electrical connection points C42 and C43 can be provided on the other metal frame. Electrical connection points C43 and C44 can be the adjacent ends of the two metal frames.

[0358] Electrical connection points C43 and C44 are grounded. Electrical connection points C41 and C42 are connected to ports A43 and A44 of breakpoint 2, respectively.

[0359] exist Figure 18 In other examples, the metal border on the left can be a third border, and the metal border on the right can be a fourth border.

[0360] Correspondingly, electrical connection point C41 can be the sixth electrical connection point of the third border, electrical connection point C44 can be the seventh electrical connection point of the third border, electrical connection point C43 can be the eighth electrical connection point of the fourth border, and electrical connection point C42 can be the ninth electrical connection point of the fourth border.

[0361] also, Figure 21 Breakpoint 2 shown can be the first breakpoint. Port A43 is the first port of the first breakpoint, and port A44 is the second port of the first breakpoint.

[0362] It is understandable that by reusing multiple metal frames, more NFC signals can be introduced into the top frame to participate in radiation, thereby effectively improving the NFC radiation capability of the top area.

[0363] It should be noted that, in this Figure 21 In the example, the two metal frames are grounded at their closest points. In other examples, grounding can be achieved through electrical connection point C41 and electrical connection point C44 connected to port A43. In still other examples, grounding can be achieved through electrical connection point C42 and electrical connection point C43 connected to port A44.

[0364] Other configurations and Figure 18 The connection logic shown is similar, and the two can be used as a reference, so I will not repeat them here.

[0365] It should be noted that in this example, the relationship between... Figure 21 Similarly, in the scheme shown, the parts of the metal frame that actually participate in NFC signal radiation are the part between electrical connection point C41 and electrical connection point C44, and the part between electrical connection point C42 and electrical connection point C43.

[0366] Thus, the longer the metal frame between electrical connection points C41 and C44, the larger the size of the top frame used for NFC signal radiation, which in turn allows the NFC antenna to achieve better radiation performance in the top region of the electronic device. Similarly, the longer the metal frame between electrical connection points C42 and C43, the more significant the improvement in radiation performance in the top region.

[0367] In some examples, the sum of the lengths of the multiple metal frames involved in NFC signal radiation may be no less than 1 mm. For example, the length of the metal frame between electrical connection point C41 and electrical connection point C44 may be no less than 1 mm. Similarly, the length of the metal frame between electrical connection point C42 and electrical connection point C43 may be no less than 1 mm.

[0368] Thus, based on such Figure 18As shown in the NFC module, when the NFC chip works, the signal can flow out from the port B1, pass through the matching circuit 1, and flow into the coil part of the NFC antenna from the port A41. The signal can also flow into the metal frame from the port A43 connected by the breakpoint 2, and then flow back to the reference ground through the electrical connection point C44 of the metal frame.

[0369] The signal can also flow into the top frame from the electrical connection point C43 through the reference ground. The signal can flow out from the top frame by the electrical connection point C42, flow into the coil part by the port A44. The signal can be transmitted by the coil part, flow out from the NFC antenna by the port A42. The signal can also flow into the NFC chip by the port B1 through the matching circuit 2 and the port M22.

[0370] In this way, the signal can be circulated in the NFC module, and the wireless signal can be radiated through the coil part of the NFC antenna and the top frame.

[0371] In the present example, during the process of configuring the NFC antenna as shown in Figure 21 , the current direction and / or inductance and / or impedance can also be controlled to obtain better NFC radiation performance. The specific implementation can be referred to the description in Figure 21 , which will not be repeated here.

[0372] When the current direction is controlled, any of the above related configurations can be used to make the current direction on the multiple metal frames the same as the current direction in the coil part close to the top edge of the coil. In this way, the radiation of the top area is superimposed, and the NFC radiation performance is improved.

[0373] In this way, based on the NFC module as shown in Figure 22 , the signal can be effectively guided to the top frame metal radiation. In some implementations, combined with the control of the current direction, the NFC radiation range can be adjusted to the top area, and better NFC radiation performance can be obtained in the top area.

[0374] Combined with the description in Figure 22 , in the example of the Figure 21 , the filtering components can be configured to isolate each system in the case of multiple systems multiplexing the top frame for radiation. The multiple systems can include the NFC communication system and any other communication system.

[0375] For example, in some implementations, a filtering component can be added between the port A43 and the electrical connection point C41. In other implementations, a filtering component can be added between the port A44 and the electrical connection point C42.

[0376] For example, the filter component can include an inductor in series and / or a capacitor in parallel.

[0377] In some implementations, the inductor in series can have a current carrying capacity of 800 mA or more. The values of the inductor and the capacitor can be flexibly set according to actual conditions, and embodiments of the present application do not limit this.

[0378] In some implementations, the inductor in series can use a wound inductor, thereby reducing inductor loss.

[0379] It can be understood that the scheme shown in Figure 23 In the implementation of the scheme shown in

[0380] For example, referring to Figure 21 , another comparative diagram of an NFC module and a metal decoration provided by embodiments of the present application is provided.

[0381] In this example, the projection of the metal decoration to the coil part of the NFC antenna at least partially overlaps the coil part of the NFC antenna.

[0382] As shown in Figure 21 to Figure 22 , although the metal decoration blocks part of the coil, the top frame participates in radiation, so that the magnetic field strength in the top area is high. Therefore, better radiation performance can be obtained.

[0383] In addition, in other examples, the implementation of the scheme shown in Figure 23 can also be applied to the case where the metal decoration is arranged on one side of the electronic device.

[0384] For example, referring to Figure 21 to Figure 22 , another comparative diagram of an NFC module and a metal decoration provided by embodiments of the present application is provided.

[0385] In this example, the connection and configuration of the NFC module are the same as in the example in Figure 21 . The projection of the metal decoration to the side of the display screen can not overlap the coil part of the NFC antenna.

[0386] It can be understood that, in combination with the description in Figure 24 , the NFC module provided by embodiments of the present application can also provide better radiation performance in the top area in the scenario shown in Figure 18 . Specific analysis can be referred to the description in Figure 24 , which will not be repeated here.

[0387] It can be understood that in the above various embodiments, the current direction on at least part of the coils in the coil part can be made the same as the current direction on the metal frame by the targeted setting of the connection relationship between the coil part and the metal frame.

[0388] In some scenarios, as shown in Figure 24 , port A43 can be connected with electrical connection point C41, and port A44 can be connected with electrical connection point C42, so as to realize the control of the current direction without crossing the connection lines.

[0389] In other scenarios, in order to make the current direction on the multiple metal frames the same as the current direction on the coil part close to the top edge, the above purpose can be achieved by using the crossing but conductive connection lines.

[0390] Referring to Figure 3 , another logic diagram of the NFC module provided by the embodiments of the present application is provided.

[0391] Similar to the example in Figure 9 , the example in Figure 14 provides the matching circuit 1 and the matching circuit 2 in the NFC module, and the NFC chip. The example in Figure 24 also provides a specific composition example of the NFC antenna.

[0392] As shown in Figure 21 , the connection form of the matching circuit 1 and the matching circuit 2, the NFC chip, and the feeding point of the NFC antenna can refer to the description in Figure 21 , which will not be repeated here.

[0393] In this example, the NFC antenna can include a coil part and a top frame. The setting of the coil part can refer to the examples in the above Figure 24 or Figure 24 .

[0394] In the example of Figure 18 , the NFC antenna can include multiple metal frames. In this example, the NFC antenna includes two metal frames as an example. In some embodiments, the two metal frames can further include a metal frame arranged on the side edge, or partially arranged on the top edge, or partially arranged on the side edge. The embodiments of the present application do not limit this.

[0395] On one of the metal frames, an electrical connection point C51 and an electrical connection point C54 can be arranged. On the other metal frame, an electrical connection point C52 and an electrical connection point C53 can be arranged. The electrical connection point C51 and the electrical connection point C52 can be the ends of the two metal frames close to each other.

[0396] In this example, the electrical connection point C53 and the electrical connection point C54 are grounded. The electrical connection point C51 and the electrical connection point C52 are connected with the port A54 and the port A53 of the breakpoint 2 respectively.

[0397] In this example, the position and the grounding configuration of the electrical connection point C54 and / or the electrical connection point C53 can be required by the antenna design of other systems.

[0398] Correspondingly, in this example, in order to meet the current direction on the metal frame between the electrical connection point C54 and the electrical connection point C51, and the current direction on the metal frame between the electrical connection point C52 and the electrical connection point C53, which is the same as the current direction on the coil part close to the top edge of the coil, the port A53 can be connected with the electrical connection point C52, and the port A54 can be connected with the electrical connection point C51. The port A53 can be the electrical connection point connected with the port A51 in the breakpoint 2. The port A54 can be the electrical connection point connected with the port A52 in the breakpoint 2.

[0399] Thus, the connection of the coil part and the multiple metal frames is realized through the cross but not conductive connection lines.

[0400] In this example, other metal frames arranged in the area that can be connected with the Figure 24 The scheme is similar to that shown in the foregoing examples, and thus is not described herein.

[0401] It should be noted that in this example, the part of the metal frame actually participating in the NFC signal radiation is similar to the scheme shown in the foregoing examples. Figure 21 The part of the metal frame actually participating in the NFC signal radiation is similar to the scheme shown in the foregoing examples.

[0402] In this way, the greater the length of the metal frame between the electrical connection point C51 and the electrical connection point C54, the greater the size of the top metal frame used for NFC signal radiation, and thus the NFC antenna can obtain better radiation performance in the top area of the electronic device. Similarly, the greater the length of the metal frame between the electrical connection point C52 and the electrical connection point C53, the more obvious the improvement of the radiation performance in the top area.

[0403] In some examples, the sum of the lengths of the multiple metal frames participating in the NFC signal radiation can be not less than 1 mm. For example, the length of the metal frame between the electrical connection point C51 and the electrical connection point C54 can be not less than 1 mm. For another example, the length of the metal frame between the electrical connection point C52 and the electrical connection point C53 can be not less than 1 mm.

[0404] In this way, based on the scheme shown in the foregoing examples, the length of the metal frame between the electrical connection point C51 and the electrical connection point C54 can be not less than 1 mm, and the length of the metal frame between the electrical connection point C52 and the electrical connection point C53 can be not less than 1 mm. Figure 24The NFC module shown in the figure, when the NFC chip is working, the signal can flow out from the port B1, pass through the matching circuit 1, and flow into the coil part of the NFC antenna from the port A51. The signal can also flow into the metal frame from the port A53 connected by the breakpoint 2, and then flow back to the reference ground through the electrical connection point C54 of the metal frame.

[0405] The signal can also flow into the top frame from the electrical connection point C53 through the reference ground. The signal can flow out from the top frame by the electrical connection point C52, flow into the coil part by the port A54. The signal can flow out from the NFC antenna by the port A52 through the transmission of the coil part. The signal can also flow into the NFC chip by the port B1 through the matching circuit 2 by the port M22.

[0406] In this way, the signal flow in the NFC module can be realized, and the wireless signal radiation can be realized through the coil part of the NFC antenna and the top frame.

[0407] In the present example, in the process of configuring the NFC antenna as shown in Figure 24 , the inductance and / or impedance can also be controlled to obtain better NFC radiation performance. The specific implementation can be referred to the description in Figure 25 , which will not be repeated here.

[0408] In some embodiments, when the metal frame multiplexed by the NFC antenna shown in Figure 22 is also used for the antenna setting of other systems, one or more filtering components can also be arranged on the connection path between the metal frame and the coil part. The specific arrangement is similar to the scheme example shown in Figure 25 , which will not be repeated here.

[0409] In this way, based on the NFC module shown in Figure 24 , the signal can be effectively guided to the top frame metal radiation. In some implementations, combined with the control of the current direction, the adjustment of the NFC radiation range to the top area can be realized, and better NFC radiation performance can be obtained in the top area.

[0410] It can be understood that, in the scheme implementation shown in Figure 26 , since the NFC signal is introduced into the top frame for radiation, on the one hand, the NFC communication performance of the NFC module in the top area can be improved, and on the other hand, the influence of the metal decoration on the NFC antenna can be reduced.

[0411] For example, referring to Figure 24 , another contrast schematic diagram of the NFC module and the metal decoration provided by the embodiments of the present application is provided.

[0412] In this example, the projection of the metal decoration to the coil part of the NFC antenna is at least partially overlapped with the coil part of the NFC antenna.

[0413] It should be understood that, based on the similar mechanism, the Figure 24 to Figure 25 application of the Figure 26 application achieves a higher magnetic field strength in the top area, although the metal decoration shields part of the coil, because the top frame participates in radiation.

[0414] In addition, in other examples, the Figure 24 to Figure 25 application of the application can also be applied to the case where the metal decoration is arranged on one side of the electronic device.

[0415] Referring to Figure 21 to Figure 26 , another control schematic diagram of the NFC module and the metal decoration provided by the embodiments of the application is provided.

[0416] In this example, the connection and configuration of the NFC module are the same as in the example of Figure 27 . The projection of the metal decoration to the side of the display screen can not be overlapped with the coil part of the NFC antenna.

[0417] It can be understood that, in combination with the description in Figure 27 , the NFC module provided by the embodiments of the application can also provide better radiation performance in the top area in the scenario shown in Figure 27 . The specific analysis can be referred to the description in Figure 3 , which is not repeated here.

[0418] In the above Figure 9 application, the NFC antenna multiplexes two metal frames to cooperate with the coil part to radiate, for example. In other embodiments, the NFC antenna can also multiplex more metal frames to radiate, thereby extending the length (area) of the top frame produced by the NFC signal radiation, achieving the effect of improving the NFC radiation performance in the top area.

[0419] For example, referring to Figure 14 , another logic schematic diagram of the NFC module provided by the embodiments of the application is provided.

[0420] Similar to any of the preceding embodiments, the example in Figure 21 provides a matching circuit 1 and a matching circuit 2 in the NFC module, as well as an NFC chip. The example in Figure 24 also provides a specific composition example of the NFC antenna.

[0421] As shown in Figure 27 , the connection form of the matching circuit 1 and the matching circuit 2, the NFC chip, and the feed point of the NFC antenna can be referred toFigure 27 The explanations in the text are omitted here.

[0422] In this example, the NFC antenna may include a coil portion and a top bezel. The coil portion can be configured as described above. Figure 27 or Figure 27 or Figure 21 or Figure 21 Examples are shown in the text.

[0423] In Figure 18 In the example, the NFC antenna may include multiple metal frames. In this example, the NFC antenna includes three metal frames.

[0424] like Figure 21 As shown, in the metal frame of the NFC antenna, the left metal frame can be provided with electrical connection points C61 and C62. The central metal frame can be provided with electrical connection points C63, C64, and C65. The right metal frame can be provided with electrical connection points C66 and C67. At least one of these three metal frames can be located on the top edge of the electronic device. That is, at least one of these three metal frames can be the top edge.

[0425] In this example, electrical connection points C61, C64, and C67 can be grounded separately. In some scenarios, the location and connection logic of these grounded electrical connection points can be determined by the antenna configuration requirements of other systems.

[0426] In this example, when the three metal frames are used for NFC antenna radiation, the connection configuration between ports A63 and A64 and the electrical connection points on any of the metal frames ensures that the current direction on each metal frame participating in NFC radiation is the same as the current direction on the coil near the top edge of the coil section. This results in positive superposition of NFC radiation in the top region, thereby improving the radiation performance of NFC in the top region.

[0427] For example, port A63 is connected to port A61 via a coil, and port A64 is connected to port A62 via a coil.

[0428] In this example, with the left metal frame and electrical connection point C62 configured to the right of electrical connection point C61, electrical connection point C62 can be connected to port A64.

[0429] If the grounding electrical connection point C64 is not located at either end of the metal frame, then the electrical connection point C63 to the left of the electrical connection point C64 can be connected to port A63, and the electrical connection point C65 to the right of the electrical connection point C64 can be connected to port A64.

[0430] For the right metal frame, the electric connection point C67 is arranged at the right side of the electric connection point C66, which can be connected with the port A63.

[0431] Thus, the current directions of the three metal frames can meet the above requirements.

[0432] It should be understood that the connection mode and the arrangement positions of the electric connection points on the metal frames shown in the above examples are only examples, and in other examples, the arrangement positions of the electric connection points on the metal frames and / or the connection modes of the electric connection points and the coil parts can also be different from those in the above examples. In various implementations, the current directions of the metal frames participating in the NFC radiation can be made the same as the current direction of the coil part close to the top edge of the coil through similar configuration modes. Figure 24 Figure 27 In various implementations, the current directions of the metal frames participating in the NFC radiation can be made the same as the current direction of the coil part close to the top edge of the coil through similar configuration modes.

[0433] In this example, other metal frames arranged in a scheme similar to that shown in Figure 18 will not be described herein.

[0434] It should be noted that in this example, similar to the scheme shown in Figure 21 , the parts of the metal frames actually participating in the NFC signal radiation are the parts between the electric connection point C61 and the electric connection point C62, the parts between the electric connection point C63 and the electric connection point C65, and the parts between the electric connection point C66 and the electric connection point C67.

[0435] In this way, the greater the length of the metal frame between the electric connection point C61 and the electric connection point C62, the greater the size of the top metal frame for NFC signal radiation, which can enable the NFC antenna to obtain better radiation performance in the top region of the electronic device. Similarly, the greater the length of the metal frame between the electric connection point C63 and the electric connection point C65, the more obvious the improvement of the radiation performance in the top region. The greater the length of the metal frame between the electric connection point C66 and the electric connection point C67, the more obvious the improvement of the radiation performance in the top region.

[0436] In some examples, the sum of the lengths of the metal frames participating in the NFC signal radiation can be no less than 1 mm.

[0437] In addition, in combination with the descriptions in Figure 24 , Figure 27 and Figure 24 , in this example, during the NFC antenna configuration as shown in Figure 27 , the inductance and / or impedance can also be controlled to obtain better NFC radiation performance. The specific implementation can be referred to Figure 27 , Figure 28 and​Figure 22 The details are not described herein.

[0438] In some embodiments, in Figure 28 When the metal frame multiplexing NFC antenna is also used for antenna arrangement of other systems, one or more filtering components can also be arranged on the connection path between the metal frame and the coil part. The specific arrangement is similar to the example shown in Figure 27 The details are not described herein.

[0439] In this way, based on the NFC module as shown in Figure 29 The signal can be effectively guided to the top frame metal radiation. In some implementations, in combination with the control of the current direction, the adjustment of the NFC radiation range to the top area can be realized, so as to obtain better NFC radiation performance in the top area.

[0440] It can be understood that, in the implementation of the scheme as shown in Figure 27 In the implementation of the scheme as shown in

[0441] For example, referring to Figure 27 to Figure 28 Another comparison diagram of the NFC module and the metal decoration provided by the embodiments of the present application is shown.

[0442] In this example, the projection of the metal decoration to the coil part of the NFC antenna at least partially overlaps with the coil part of the NFC antenna.

[0443] It should be understood that, based on the similar mechanism as Figure 29 In the implementation of the scheme as shown in Figure 27 to Figure 28 Although the metal decoration shields part of the coil, the top frame participates in radiation, so that the magnetic field intensity in the top area is high. Therefore, better radiation performance can be obtained.

[0444] In addition, in another example, the implementation of the scheme as shown in Figure 30 The implementation of the scheme as shown in

[0445] For example, referring to Figure 30 Another comparison diagram of the NFC module and the metal decoration provided by the embodiments of the present application is shown.

[0446] In this example, the connection and configuration of the NFC module are the same as the example in Figure 30 The projection of the metal decoration to the display screen side can not overlap with the coil part of the NFC antenna.

[0447] It can be understood that, in combination with the description in Figure 3 , in the scenario shown in Figure 9 , the NFC module provided by the embodiments of the present application can also provide better radiation performance in the top area. The specific analysis can refer to the description in Figure 14 , which will not be repeated here.

[0448] In the above examples, the electrical connection between the two ports of the coil part and the metal frame is provided in the case that the NFC antenna multiplexes multiple metal frames.

[0449] In some other examples, in the case that the NFC antenna multiplexes two or more metal frames for radiation, one of the two ports of the breakpoint 2 of the coil part can also be grounded. In this way, by controlling the connection relationship between the other port in the breakpoint 2 and the metal frame, the same effect of controlling the current direction on the metal frame to be the same as the current direction on the coil close to the top edge of the coil part can also be achieved.

[0450] For example, referring to Figure 21 , a logic diagram of another NFC module provided by the embodiments of the present application is shown.

[0451] Similar to any of the foregoing embodiments, the example in Figure 24 provides a matching circuit 1 and a matching circuit 2 in the NFC module, as well as an NFC chip. The example in Figure 27 also provides a specific example of the composition of the NFC antenna.

[0452] As shown in Figure 30 , the connection form of the matching circuit 1 and the matching circuit 2, the NFC chip, and the feeding point of the NFC antenna can refer to the description in Figure 30 , which will not be repeated here.

[0453] In this example, the NFC antenna can include a coil part and a top frame. The arrangement of the coil part can refer to the examples in the above Figure 30 or Figure 30 or Figure 30 or Figure 30 or Figure 30 .

[0454] In the example of Figure 24 , the NFC antenna can include multiple metal frames. In this example, the NFC antenna includes two metal frames as an example.

[0455] As shown in Figure 18As shown, the metal frame of the NFC antenna can be provided with an electric connection point C71 and an electric connection point C72. The electric connection point C71 can be provided at the left end of the left metal frame. The electric connection point C72 can be provided at a position (e.g., a middle position) other than the end of the left metal frame.

[0456] The right metal frame can be provided with an electric connection point C73 and an electric connection point C74. The electric connection point C73 and the electric connection point C74 can be respectively provided at the two ends of the right metal frame.

[0457] At least one of the two metal frames can be provided at the top edge of the electronic device. That is, at least one of the two metal frames can be a top metal frame.

[0458] In some examples, Figure 21 the left metal frame can be a fifth metal frame, and the right metal frame can be a sixth metal frame. The electric connection point C71 can be a tenth electric connection point on the fifth metal frame, and the electric connection point C72 can be an eleventh electric connection point on the fifth metal frame. The electric connection point C73 can be a twelfth electric connection point on the sixth metal frame, and the electric connection point C74 can be a thirteenth electric connection point on the sixth metal frame.

[0459] In addition, in the example, Figure 24 the breakpoint 2 is a first breakpoint. The port A73 is a first port of the first breakpoint, and the port A74 is a second port of the first breakpoint.

[0460] In some implementations, the electric connection point C72 and the electric connection point C74 can be respectively provided with a ground. In some scenarios, the positions of the electric connection points provided with the ground and the connection logic can be determined by the antenna setting requirements of other systems.

[0461] In the example, the breakpoint 2 of the coil part can include the port A73 and the port A74. The port A73 can be connected with the port A71 and in signal communication with the port B1 of the NFC chip. The port A74 can be connected with the port A72 and in signal communication with the port B2 of the NFC chip.

[0462] As shown, Figure 30 in the example, the port A74 can be provided with a ground.

[0463] In this way, by controlling the electric connection mode of the port A73 with the left metal frame and the right metal frame, the current direction of the two metal frames when radiating the NFC signal can be the same as the current direction on the coil part close to the top edge.

[0464] For example, the port A73 can be configured to be respectively connected with the electric connection point C71 and the electric connection point C73.

[0465] Thus, the current directions on the two metal frames can meet the above requirements.

[0466] It should be understood that the connection manner shown in Figure 18 and the setting positions of the electrical connection points on the metal frame are only examples, and in other examples, the setting positions of the electrical connection points on the metal frame and / or the connection manner of each electrical connection point and the coil part can also be different from the examples in Figure 21 In various implementations, each current direction on the metal frame participating in NFC radiation can be made the same as the current direction on the coil part close to the top edge of the coil through the above similar configuration manner.

[0467] In this example, other settings similar to the scheme shown in Figure 24 are not repeated here.

[0468] In addition, in combination with the descriptions in Figure 30 , Figure 24 and Figure 30 , in this example, during the process of configuring the NFC antenna as shown in Figure 30 , the inductance and / or impedance can also be controlled to obtain better NFC radiation performance. The specific implementation can refer to the descriptions in Figure 31 , Figure 31 and Figure 30 , which are not repeated here.

[0469] In some embodiments, when the metal frame multiplexed for the NFC antenna shown in Figure 32 is also used for the antenna setting of other systems, one or more filtering components can also be arranged on the connection path between the metal frame and the coil part. The specific arrangement manner is similar to the scheme example shown in Figure 30 , which is not repeated here.

[0470] In this way, based on the NFC module as shown in Figure 30 to Figure 31 , the signal can be effectively guided to the top frame metal radiation. In some implementations, in combination with the control of the current direction, the adjustment of the NFC radiation range to the top area can be realized, and thus better NFC radiation performance can be obtained in the top area.

[0471] It can be understood that in the scheme implementation as shown in Figure 32 , since the NFC signal is introduced into the top frame for radiation, on the one hand, the NFC communication performance of the NFC module in the top area can be improved, and on the other hand, the influence of the metal decoration on the NFC antenna can be reduced.

[0472] For example, refer to Figure 30 to Figure 31This is a comparative schematic diagram of another NFC module and metal decorative part provided in the embodiments of this application.

[0473] In this example, the projection of the metal decorative piece onto the coil portion of the NFC antenna is shown to at least partially overlap with the coil portion of the NFC antenna.

[0474] It should be understood that Figure 30 to Figure 32 In the illustrated solution, although the metal decorative piece partially obscures the coil, the magnetic field strength in the top region is high due to the participation of the top frame in radiation. Therefore, good radiation performance can be achieved.

[0475] Furthermore, in other examples, this is as follows Figure 33 The solution shown can also be applied to situations where metal decorative parts are configured on one side of electronic devices.

[0476] refer to Figure 33 This is a comparative schematic diagram of another NFC module and metal decorative part provided in the embodiments of this application.

[0477] In this example, the connection and configuration of the NFC module are... Figure 33 The example in [the previous section] is the same. The projection of the metal decorative piece onto one side of the display screen can be non-overlapping with the coil portion of the NFC antenna.

[0478] Understandably, in combination Figure 3 The explanation in the document is as follows: Figure 9 In the scenario shown, the NFC module provided in this embodiment may also provide good radiation performance in the top region. For detailed analysis, please refer to... Figure 14 The explanations in the text are omitted here.

[0479] The above Figure 21 The solution implementation provides an example of how port A73 is connected to each metal frame when port A74 is grounded.

[0480] In other embodiments, port A73 can be configured to be grounded, and the connection between port A74 and the metal frame can be such that the current direction on each metal frame participating in NFC radiation is the same as the current direction on the coil near the top edge of the coil portion.

[0481] For example, refer to Figure 24 This is a logical schematic diagram of another NFC module provided in the embodiments of this application.

[0482] Similar to any of the foregoing embodiments, the Figure 27 The example provided shows matching circuit 1 and matching circuit 2 in an NFC module, as well as an NFC chip. Figure 33 The example also provides a specific example of the composition of an NFC antenna.

[0483] As shown in Figure 33 , the connection form of the matching circuit 1 and the matching circuit 2, the NFC chip and the feeding point of the NFC antenna can refer to the description in Figure 33 , which will not be repeated here.

[0484] In this example, the NFC antenna can include a coil part and a top bezel. The arrangement of the coil part can refer to the examples in the above Figure 33 or Figure 33 or Figure 24 or Figure 33 or Figure 18 .

[0485] In this Figure 21 example, the NFC antenna can include a plurality of metal bezels. In this example, the NFC antenna includes two metal bezels.

[0486] As shown in Figure 24 , among the metal bezels of the NFC antenna, the left metal bezel can be provided with an electrical connection point C76 and an electrical connection point C77. The electrical connection point C76 can be arranged at the left end of the left metal bezel. The electrical connection point C77 can be arranged at the right end of the left metal bezel.

[0487] The right metal bezel can be provided with an electrical connection point C72 and an electrical connection point C75. The electrical connection point C72 can be arranged at a position other than the end of the right metal bezel. The electrical connection point C75 can be arranged at the right end of the right metal bezel, respectively.

[0488] At least one of the two metal bezels can be arranged at the top edge of the electronic device. That is, at least one of the two metal bezels can be a top bezel.

[0489] In some implementations, the electrical connection point C76 and the electrical connection point C72 can be respectively arranged at ground. In some scenarios, the positions of the electrical connection points arranged at ground and the connection logic can be determined by the antenna arrangement requirements of other systems.

[0490] In this example, the breakpoint 2 of the coil part can include a port A73 and a port A74. The port A73 can be connected with the port A71 and communicated with the port B1 signal of the NFC chip. The port A74 can be connected with the port A72 and communicated with the port B2 signal of the NFC chip.

[0491] As shown in Figure 33 , in this example, the port A73 can be arranged at ground.

[0492] In this way, by controlling the connection mode of the port A74 and the left metal frame and the right metal frame, when the two metal frames radiate the NFC signal, the current direction is the same as the current direction on the coil part close to the top edge of the coil.

[0493] For example, the port A74 can be configured to be connected with the electrical connection point C77 and the electrical connection point C75 respectively.

[0494] Therefore, the current direction on the two metal frames meets the above requirements.

[0495] It should be understood that the connection mode shown in Figure 24 and the setting position of the electrical connection point on the metal frame are only examples, and in other examples, the setting position of the electrical connection point on the metal frame and / or the connection mode of each electrical connection point and the coil part can also be different from the example in Figure 33 In various implementations, the current direction on each metal frame participating in NFC radiation can be made the same as the current direction on the coil part close to the top edge of the coil by the above similar configuration mode.

[0496] In this example, other settings similar to the scheme shown in Figure 33 are not repeated here.

[0497] In addition, in this example, during the NFC antenna configuration as shown in Figure 34 , the inductance and / or impedance can also be controlled to obtain better NFC radiation performance. For specific implementation, reference can be made to the description in Figure 34 , Figure 33 and ​ , which are not repeated here.

[0498] In some embodiments, when the NFC antenna multiplexing metal frame shown in ​ is also used for the antenna setting of other systems, one or more filtering components can also be arranged on the connection path between the metal frame and the coil part. The specific setting mode is similar to the scheme example shown in ​ , which is not repeated here.

[0499] In this way, based on the NFC module as shown in ​ , the signal can be effectively guided to the top metal frame radiation. In some implementations, in combination with the control of the current direction, the adjustment of the NFC radiation range to the top area can be realized, and better NFC radiation performance can be obtained in the top area.

[0500] It can be understood that the NFC module as shown in ​In the implementation of the scheme shown, by introducing the NFC signal into the top frame for radiation, the NFC communication performance of the NFC module in the top area can be improved on the one hand, and the impact of the metal decorative parts on the NFC antenna can be reduced on the other hand.

[0501] For example, refer to ​ This is a comparative schematic diagram of another NFC module and metal decorative part provided in the embodiments of this application.

[0502] In this example, the projection of the metal decorative piece onto the coil portion of the NFC antenna is shown to at least partially overlap with the coil portion of the NFC antenna.

[0503] It should be understood that ​ In the illustrated solution, although the metal decorative piece partially obscures the coil, the magnetic field strength in the top region is high due to the participation of the top frame in radiation. Therefore, good radiation performance can be achieved.

[0504] Furthermore, in other examples, this is as follows ​ The solution shown can also be applied to situations where metal decorative parts are configured on one side of electronic devices.

[0505] refer to Figure 35 This is a comparative schematic diagram of another NFC module and metal decorative part provided in the embodiments of this application.

[0506] In this example, the connection and configuration of the NFC module are... Figure 33 The example in [the previous section] is the same. The projection of the metal decorative piece onto one side of the display screen can be non-overlapping with the coil portion of the NFC antenna.

[0507] Understandably, in combination Figures 33-34 The explanation in the document is as follows: Figure 35 In the scenario shown, the NFC module provided in this embodiment may also provide good radiation performance in the top region. For detailed analysis, please refer to... Figures 33-34 The explanations in the text are omitted here.

[0508] In each of the above examples, the metal frame is connected to one or both ports of breakpoint 2, so that the metal frame participates in NFC radiation, thereby improving the NFC radiation performance of the top area.

[0509] In other embodiments, the NFC antenna can also have its feed point configured to connect to a metal frame to achieve a similar effect.

[0510] Exemplary, Reference Figure 36 This is a logical schematic diagram of another NFC module provided in the embodiments of this application.

[0511] Similar to any of the foregoing embodiments, theFigure 36 The example provided shows matching circuit 1 and matching circuit 2 in an NFC module, as well as an NFC chip. Figure 36 The example also provides a specific example of the composition of an NFC antenna.

[0512] like Figure 36 As shown, the connection configuration of matching circuit 1 and matching circuit 2, the NFC chip, and the feed point of the NFC antenna can be referenced. Figure 3 The explanations in the text are omitted here.

[0513] In this example, the NFC antenna may include a coil portion and a top bezel. The coil portion can be configured as described above. Figure 9 or Figure 14 or Figure 21 or Figure 24 or Figure 27 Examples are shown in the text.

[0514] In Figure 36 In the example, an NFC antenna uses a single metal frame for radiation. It should be understood that, based on a similar mechanism, an NFC antenna can also use multiple metal frames for radiation. Specific implementation details can be found in this embodiment and the above-described embodiment using multiple metal frames for radiation; these will not be elaborated upon here.

[0515] like Figure 36 As shown, the NFC antenna multiplexed metal frame can be equipped with electrical connection points C81 and C82.

[0516] The electrical connection point C81 can be located at the left end of the metal frame, while the electrical connection point C82 can be located at a position different from the left end of the metal frame. For example, the electrical connection point C82 can be located in the middle of the metal frame.

[0517] In Figure 36 In other examples, the metal border (such as the top border) can be the seventh border. Electrical connection point C81 can be the fourteenth electrical connection point on the seventh border, and electrical connection point C82 can be the fifteenth electrical connection point on the seventh border.

[0518] Breakpoint 1 can be the second breakpoint. Port A81 can be the third port of the second breakpoint. Breakpoint 2 can be the first breakpoint, and the two ports corresponding to breakpoint 2 can be the ports corresponding to the first breakpoint.

[0519] This electrical connection point C82 can be grounded. In some scenarios, the location and connection logic of this grounded electrical connection point can be determined by the antenna configuration requirements of other systems.

[0520] In some examples, this is as follows Figure 36The metal frame shown can be the top frame of an electronic device.

[0521] In this example, the two ports corresponding to breakpoint 2 in the coil section can be grounded separately.

[0522] Furthermore, the two ports corresponding to breakpoint 1 in the coil section (such as ports A81 and A82) can be used as power supply points to connect with matching circuit 1 and matching circuit 2. For example, port A81 can be connected to port M12 of matching circuit 1 to achieve signal connection with port B1 of the NFC chip. Similarly, port A82 can be connected to port M22 of matching circuit 2 to achieve signal connection with port B2 of the NFC chip.

[0523] In this example, port A81 can also be connected to electrical connection point C81 on the metal frame, so that when the metal frame radiates NFC signals, the current direction between electrical connection points C81 and C82 can be the same as the current direction on the coil near the top edge of the coil section.

[0524] It should be understood that this is how Figure 36 The connection method and the location of the electrical connection points on the metal frame shown are merely examples. In other examples, the location of the electrical connection points on the metal frame and / or the connection method between each electrical connection point and the coil may differ. Figure 36 Examples are shown in the text. In various implementations, a similar configuration can be used to ensure that the current direction on each metal frame participating in NFC radiation is the same as the current direction on the coil near the top edge of the coil section.

[0525] In this example, other settings can be limited to... Figure 24 The proposed solutions are similar and will not be elaborated upon here.

[0526] Furthermore, in this example, when performing such Figure 36 During the NFC antenna configuration shown, the inductance and / or impedance can also be controlled to obtain better NFC radiation performance. For specific implementation details, please refer to [reference needed]. Figure 18 , Figure 21 and Figure 24 The explanations in the text are omitted here.

[0527] In some embodiments, Figure 36 The metal frame for the NFC antenna multiplexing shown can also be used in antenna setups for other systems. One or more filtering components can be placed on the connection path between the metal frame and the coil section. Specific setup methods are similar to... Figure 24 The solutions shown in the example are similar, so they will not be repeated here.

[0528] Thus, based on such Figure 36The NFC module shown can enable the signal to be effectively guided to the top frame metal radiation. In some implementations, in combination with control of the current direction, the NFC radiation range can be adjusted to the top area, thereby obtaining better NFC radiation performance in the top area.

[0529] It can be understood that the scheme as Figure 36 shown in the implementation can, on the one hand, improve the NFC communication performance of the NFC module in the top area, and on the other hand, can reduce the influence of the metal decoration on the NFC antenna.

[0530] For example, referring to Figure 37 , another control schematic diagram of an NFC module and a metal decoration provided by the embodiment of the present application is provided.

[0531] In this example, the projection of the metal decoration to the coil part of the NFC antenna at least partially overlaps with the coil part of the NFC antenna.

[0532] It should be understood that the scheme as Figure 37 shown in the implementation can, on the one hand, improve the NFC communication performance of the NFC module in the top area, and on the other hand, can reduce the influence of the metal decoration on the NFC antenna.

[0533] In addition, in another example, the scheme as Figure 36 shown in the implementation can also be applied to the case where the metal decoration is arranged on one side of the electronic device.

[0534] For example, referring to Figure 38 , another control schematic diagram of an NFC module and a metal decoration provided by the embodiment of the present application is provided.

[0535] In this example, the connection and configuration of the NFC module are the same as those in Figure 36 . The projection of the metal decoration to the side of the display screen can not overlap with the coil part of the NFC antenna.

[0536] It can be understood that, in combination with the description in Figures 36-37 , the NFC module provided by the embodiment of the present application can also provide better radiation performance in the top area in the scenario shown in Figure 38 . For specific analysis, refer to the description in Figures 36-37 , which will not be repeated here.

[0537] Therefore, through the above Figures 9-38As illustrated in the scheme, in the NFC module provided by the embodiment of the present application, the NFC antenna can include a coil part and one or more metal frames. The one or more metal frames can include at least one metal frame arranged at the top edge of the electronic device, i.e., a top metal frame.

[0538] The coil part can be provided with two breakpoints. At least one port of at least one of the two breakpoints can be connected to the metal frame.

[0539] In this way, the NFC signal can be effectively guided to the metal frame for radiation, thereby improving the NFC radiation performance of the top area of the electronic device.

[0540] In some examples, by controlling the connection mode of the coil part and the metal frame, the current direction on the metal frame when the metal frame is used for NFC signal radiation is the same as the current direction on the coil part close to the top edge. In this way, the radiation of the metal frame to the NFC signal can be positively superimposed with the radiation of the coil part to the NFC signal in the top area of the electronic device, further improving the radiation performance of the NFC signal in the top area.

[0541] In some examples, in the case where the metal frame includes at least one grounding point, the inductance between the output end (such as port M12 and port M22) of the matching circuit 1 and the matching circuit 2 and the grounding point can be controlled to be the same or similar by means of the compensation line, the additional adjustment component between the grounding point and the reference ground, and the like. In this way, the matching circuit 1 and the matching circuit 2 can be mirror-imaged. Further, the conventional requirements of the NFC signal are met, and the working efficiency of the NFC module is improved.

[0542] As an example, refer to Figure 39 , a logic diagram of a matching circuit provided by the embodiment of the present application. The matching circuit 2 can be arranged by referring to the matching circuit 1, which is not described herein.

[0543] As illustrated in Figure 39 , in this example, the inductor 1 and the capacitor 2 can be connected in series between the port M11 and the port M12 of the matching circuit 1. The capacitor 1 can be connected in parallel between the inductor 1 and the capacitor 2. The capacitor 3 can be connected in parallel between the capacitor 2 and the port M12.

[0544] The specific size of each inductor and capacitor in the above Figure 39 can be configured according to actual conditions and NFC chip specifications, and the embodiment of the present application does not limit this.

[0545] It can be understood that, in order to implement the above functions, the electronic device provided by the embodiments of the present application comprises a hardware structure and / or a software module corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of the examples described in the embodiments disclosed herein, the embodiments of the present application can be realized in the form of hardware or a combination of hardware and computer software. Whether a certain function is implemented in the form of hardware or computer software driving hardware depends on a specific application and design constraint condition of the technical solution. Those skilled in the art can use different solutions to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the embodiments of the present application.

[0546] The embodiments of the present application can divide the functions of the electronic device according to the above-mentioned scheme examples, for example, each function module can be divided according to each function, or two or more functions can be integrated into one processing module. The integrated module can be realized in the form of hardware or software function module. It should be noted that the division of the modules in the embodiments of the present application is illustrative, and is only a logical function division. There can be another division manner in actual implementation.

[0547] The above mainly introduces the scheme provided by the embodiments of the present application from the perspective of each function module. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of the examples described in the embodiments disclosed herein, the present application can be realized in the form of hardware or a combination of hardware and computer software. Whether a certain function is implemented in the form of hardware or computer software driving hardware depends on a specific application and design constraint condition of the technical solution. Those skilled in the art can use different solutions to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0548] The above integrated module can be realized in the form of hardware or software function module. It should be noted that the division of the modules in the embodiments of the present application is illustrative, and is only a logical function division. There can be another division manner in actual implementation.

[0549] In some embodiments, the present application also provides an electronic device. The electronic device can be provided with the NFC module provided by any of the above-mentioned embodiments.

[0550] Although the present application has been described in connection with the preferred embodiments thereof with reference to the specific content thereof, it will be apparent to those skilled in the art that various modifications and changes can be made thereto without departing from the scope of the present application. Accordingly, the description and drawings are to be regarded as illustrative in nature and are not to be taken as limiting the scope of the present application as defined by the appended claims. Obviously many modifications and changes can be made in the application without departing from the scope thereof. It is understood that the application is not to be limited to the specific examples set forth as examples, but that these examples are intended to cover all modifications and variations of this application.

Claims

1. An antenna, characterized by The antenna is applied to an electronic device, and the antenna comprises: a coil part and a metal frame, the coil part is provided with at least two breakpoints, and each breakpoint is connected to two ports; the at least two breakpoints include a breakpoint connected to the metal frame through at least one port; a first breakpoint of the at least two breakpoints of the coil part is configured at a first position, so that a difference between a first inductance and a second inductance is not more than 50% of the first inductance or the second inductance; and the first breakpoint is used to be connected to the metal frame. The first inductance and the second inductance are respectively inductances of signal transmission paths between two output terminals of a matching circuit connected to the coil part and between the two output terminals and a ground point on the antenna.

2. The antenna of claim 1, wherein when the antenna is in operation, a current direction in at least part of the coil part is the same as a current direction on the metal frame.

3. The antenna of claim 1 or 2, wherein the coil part is made of any one of a flexible printed circuit board (FPC), laser direct structuring (LDS), and steel sheet injection molding.

4. The antenna according to claim 3, characterized in that the coil part is attached to an inner side of a back cover of the electronic device.

5. The antenna according to claim 1 or 2, characterized in that, The metal frame is one or more, and the metal frame includes a top frame, which is a metal frame arranged on a top edge of the electronic device.

6. The antenna of claim 2, wherein the current direction in at least part of the coil part is the same as the current direction on the metal frame, including that the current direction on a coil close to the top edge of the electronic device is the same as the current direction on the metal frame.

7. The antenna of claim 1, wherein the at least two breakpoints of the coil part further include a breakpoint provided with a feeding point, and the feeding point is used to input a near field communication (NFC) signal to the coil part.

8. The antenna of claim 7, wherein the at least two breakpoints of the coil part include a first breakpoint and a second breakpoint, two ends of the first breakpoint are respectively connected to a first port and a second port, and two ends of the second breakpoint are respectively connected to a third port and a fourth port; the first breakpoint is connected to the metal frame through the first port and / or the second port, or the two ports of the first breakpoint are respectively connected to a reference ground; the third port and the fourth port of the second breakpoint are respectively configured as the feeding point.

9. The antenna according to claim 8, characterized in that, The electronic device is further provided with a first matching circuit, a second matching circuit, and an NFC chip; the third port of the second breakpoint is connected to a second port of the first matching circuit, a first port of the first matching circuit is connected to a first port of the NFC chip, the fourth port of the second breakpoint is connected to a third port of the second matching circuit, a fourth port of the second matching circuit is connected to a second port of the NFC chip, the NFC chip outputs an NFC signal as a differential signal through the first port of the NFC chip and the second port of the NFC chip.

10. The antenna according to claim 8, wherein, The first breakpoint is connected with the metal frame through the first port and / or the second port; The metal frame comprises a first frame, and the first frame is provided with a first electrical connection point and a second electrical connection point, The first port of the first breakpoint is connected with the first electrical connection point on the first frame, and the second port of the first breakpoint is connected with a reference ground; The second electrical connection point on the first frame is connected with the reference ground.

11. The antenna according to claim 8, wherein, The first breakpoint is connected with the metal frame through the first port and / or the second port; The metal frame comprises a second frame, and the second frame is provided with a third electrical connection point and a fourth electrical connection point, The first port of the first breakpoint is connected with the third electrical connection point on the second frame, and the second port of the first breakpoint is connected with the fourth electrical connection point on the second frame.

12. The antenna according to claim 11, characterized in that, The first breakpoint is connected with the metal frame through the first port and / or the second port; The third electrical connection point and the fourth electrical connection point on the second frame are respectively arranged at two ends of the second frame; The second frame further comprises a fifth electrical connection point, the position of the fifth electrical connection point is different from that of the third electrical connection point or the fourth electrical connection point, and the fifth electrical connection point is connected with the reference ground.

13. The antenna according to claim 8 or 12, characterized in that The first breakpoint is connected with the metal frame through the first port and / or the second port; The metal frame comprises a third frame and a fourth frame, two ends of the third frame are respectively provided with a sixth electrical connection point and a seventh electrical connection point, and two ends of the fourth frame are provided with an eighth electrical connection point and a ninth electrical connection point; The seventh electrical connection point and the eighth electrical connection point are oppositely arranged; The seventh electrical connection point and the eighth electrical connection point are respectively connected with the reference ground; The first port of the first breakpoint is connected with the sixth electrical connection point on the third frame, and the second port of the first breakpoint is connected with the ninth electrical connection point on the fourth frame.

14. The antenna according to claim 8, wherein, The first breakpoint is connected with the metal frame through the first port and / or the second port; The metal frame comprises a fifth frame and a sixth frame, one end of the fifth frame is provided with a tenth electrical connection point, the fifth frame is further provided with an eleventh electrical connection point, and two ends of the sixth frame are respectively provided with a twelfth electrical connection point and a thirteenth electrical connection point; The end where the tenth electrical connection point is located is away from the sixth frame, and the end where the twelfth electrical connection point is located is close to the fifth frame; The eleventh electrical connection point and the thirteenth electrical connection point are respectively connected with the reference ground; The first port of the first breakpoint is connected with the tenth electrical connection point on the fifth frame, and the first port of the first breakpoint is further connected with the twelfth electrical connection point on the sixth frame.

15. The antenna according to claim 8, wherein, The two ports of the first breakpoint are respectively connected with the reference ground; The metal frame comprises a seventh frame, and the seventh frame is provided with a fourteenth electrical connection point and a fifteenth electrical connection point, and the fifteenth electrical connection point is connected with the reference ground; The third port of the second breakpoint is connected with the fourteenth electrical connection point.

16. The antenna of claim 1, wherein, The metal frame is also used for first communication, the first communication including any one of the following: cellular communication, WIFI communication, Bluetooth communication; A filter assembly is arranged on a connecting line between the coil part and the metal frame, the filter assembly being used for transmission of NFC signals between the coil part and the metal frame, and the filter assembly also being used for preventing signals of the first communication from flowing into the coil part.

17. The antenna of claim 9, wherein, In the presence of at least one electrical connection point and / or port connected with the reference ground, The at least one electrical connection point and / or port is connected with the reference ground through an adjusting component; the adjusting component includes at least one of a capacitor, an inductor, and a resistor; The adjusting component is used for adjusting a difference between a first inductance and a second inductance to be no more than 50% of the first inductance or the second inductance; The first inductance is an inductance between a second port of the first matching circuit and a reference ground on the antenna to which the second port is signal-connected; The second inductance is an inductance between a third port of the second matching circuit and a reference ground on the antenna to which the third port is signal-connected.

18. An electronic device, comprising: The electronic device includes the antenna as claimed in any one of claims 1-17.

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