NFC antenna and NFC communication device for mobile terminal

Abstract

The present application discloses an NFC antenna and an NFC communication device for a mobile terminal, wherein the NFC antenna comprises: a substrate; a ferrite disposed on the substrate; and a first flexible circuit board FPC antenna disposed on the ferrite, wherein the first FPC antenna comprises a first end point and a second end point. The NFC antenna can effectively reduce the occupied area of ​​the NFC antenna by using an FPC antenna for radiation, and has strong applicability in the increasingly complex mobile terminal antenna environment.

Description

Technical Field

[0001] The present application relates to the field of terminal technology, and in particular to an NFC antenna and an NFC communication device for a mobile terminal. Background Art

[0002] At present, Near Field Communication (NFC) technology is becoming increasingly popular in mobile terminals (such as mobile phones, wearable devices, etc.), prompting major mobile Internet companies to actively develop NFC applications and promote the continuous development of NFC technology. In the field of NFC applications, it mainly includes the following applications: mobile payment, public transportation, identity recognition and smart communication.

[0003] In order to meet users' various needs for NFC and adapt to the increasingly complex environment of mobile terminals, the form of NFC antennas is constantly changing. The following two types of NFC antennas are common: NFC coil antennas and NFC diversity antennas.

[0004] However, the NFC coil antenna is a single-layer coil, which has strict requirements on the size of the coil. Current mobile terminals need to add 5G antennas, and it is difficult to ensure the required area of ​​the NFC coil antenna. The NFC diversity antenna shares a metal frame with the main antenna of the mobile terminal, which not only requires a metal frame, but also affects the performance of the main antenna, causing its power to drop by about 1.5dB. In addition, in order to reduce the mutual influence between the main antenna and the NFC diversity antenna, a large inductor needs to be added to the shared feed end, which is not conducive to device layout. Summary of the invention

[0005] The present application aims to solve one of the technical problems in the related art at least to some extent.

[0006] To this end, the present application proposes an NFC antenna and an NFC communication device for a mobile terminal, so as to effectively reduce the occupied area of ​​the NFC antenna and reduce the impact on the performance of the main antenna.

[0007] The first embodiment of the present application provides an NFC antenna for a mobile terminal, including:

[0008] substrate;

[0009] A ferrite disposed on the substrate;

[0010] A first FPC antenna is disposed on the ferrite, wherein the first FPC antenna includes a first end point and a second end point.

[0011] As a first possible implementation manner of the embodiment of the first aspect of the present application, the first endpoint is a feeding end, and the second endpoint is a grounding point.

[0012] As a second possible implementation manner of the embodiment of the first aspect of the present application, the length of the first FPC antenna is greater than the length of the ferrite, so that the first endpoint and the second endpoint are suspended relative to the substrate.

[0013] As a third possible implementation manner of the embodiment of the first aspect of the present application, the NFC antenna further includes:

[0014] The second FPC antenna includes a third endpoint and a fourth endpoint.

[0015] As a fourth possible implementation manner of the embodiment of the first aspect of the present application, the second endpoint is connected to the fourth endpoint.

[0016] As a fifth possible implementation manner of the embodiment of the first aspect of the present application, the first endpoint corresponds to the third endpoint, and the second endpoint corresponds to the fourth endpoint.

[0017] As a sixth possible implementation manner of the embodiment of the first aspect of the present application, the first FPC antenna and the second FPC antenna are not arranged to overlap.

[0018] As a seventh possible implementation manner of the embodiment of the first aspect of the present application, the second FPC antenna is located between the substrate and the ferrite.

[0019] As an eighth possible implementation manner of the embodiment of the first aspect of the present application, the second FPC antenna and the first FPC antenna are respectively located on two sides of the substrate.

[0020] The NFC antenna for mobile terminals of the embodiment of the present application can effectively reduce the occupied area of ​​the NFC antenna by using an FPC antenna for radiation, and has strong applicability in the increasingly complex mobile terminal antenna environment. In addition, a separate FPC antenna is used for radiation, which is not shared with the main antenna. During the design process, the impact on the performance of the main antenna can be reduced by avoiding a certain distance. In addition, the use of large inductance can be avoided, which is beneficial to device layout.

[0021] The second aspect of the present application provides an NFC communication device for a mobile terminal, including:

[0022] An NFC antenna for a mobile terminal proposed in the first aspect of the present application;

[0023] a matching network connected to the NFC antenna;

[0024] An NFC chip connected to the matching network.

[0025] The NFC communication device of the mobile terminal of the embodiment of the present application can effectively reduce the occupied area of ​​the NFC antenna by using an FPC antenna for radiation, and has strong applicability in the increasingly complex mobile terminal antenna environment. In addition, a separate FPC antenna is used for radiation, which is not shared with the main antenna. During the design process, the impact on the performance of the main antenna can be reduced by avoiding a certain distance. In addition, the use of large inductance can be avoided, which is conducive to device layout.

[0026] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0028] Figure 1 This is a schematic diagram of the structure of an NFC antenna for a mobile terminal provided in Embodiment 1 of the present application;

[0029] Figure 2 This is a schematic diagram of a top view of an NFC antenna in an embodiment of the present application;

[0030] Figure 3 This is a schematic diagram of the magnetic field generated by the NFC antenna in an embodiment of the present application;

[0031] Figure 4 This is a schematic diagram of the structure of an NFC antenna for a mobile terminal provided in Embodiment 2 of the present application;

[0032] Figure 5 A side view of the NFC antenna in the embodiment of the present application Figure 1 ;

[0033] Figure 6 A side view of the NFC antenna in the embodiment of the present application Figure 2 ;

[0034] Figure 7 This is a schematic diagram of the structure of an NFC communication device for a mobile terminal provided in Embodiment 3 of the present application;

[0035] Figure 8 This is a schematic diagram of the structure of the NFC communication device provided in the fourth embodiment of the present application;

[0036] Fig. 9 This is a schematic diagram of the structure of the NFC communication device provided in Example 5 of the present application. DETAILED DESCRIPTION

[0037] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0038] In recent years, the research on NFC technology is mainly distributed in four areas, including NFC theory and development, NFC basic research, NFC application and service research, NFC application environment research, etc. There are three main NFC working modes: reader / writer mode, card emulation mode, and peer-to-peer mode.

[0039] The document "NFC Research Framework: A Literature Review And Future Research Directions" counted the articles on NFC technology published in major journals and conferences from 2006 to 2010. The statistical results show that among the four research fields, the largest proportion is NFC application and service field, reaching 40.54%, and the most studied mode is reader read-write mode, reaching 51.35%. The results show that in the current NFC technology research field, the research on NFC application is the mainstream trend and has a relatively broad application prospect.

[0040] The widespread application of NFC technology is inseparable from the rapid development of mobile terminals with NFC functions. At present, mobile terminals with NFC functions, such as smartphones, have a growing market share. In 2017, smartphones with NFC functions accounted for more than 60% of the total shipments of smartphones. With the continuous popularization of NFC technology in mobile terminals, major mobile Internet companies have taken the initiative to develop NFC applications, thus promoting the development of NFC technology. At present, in the field of NFC applications, the mainstream applications are mainly in the following aspects:

[0041] In terms of mobile payment, NFC started late in China, but in countries such as Japan and South Korea, NFC technology has occupied a huge market in mobile payment. In recent years, my country has also introduced a series of policies to encourage the application of NFC technology in the field of mobile payment. Using mobile phones with NFC functions as "electronic wallets" can simplify the payment process and make payment more secure, reliable and efficient.

[0042] In terms of public transportation, Beijing's buses and subways have implemented the "swipe phone" function, which does not require a network connection during the operation process. Mobile phones with NFC functions can also be swiped even when they are turned off, greatly facilitating people's travel. In the field of shared bicycles, Mobike and ofo shared bicycles have also successively implemented NFC unlocking functions. Users can use their mobile phones to quickly unlock their bicycles, solving the security issues encountered by barcode unlocking and making the operation more convenient.

[0043] In terms of identity recognition, NFC technology has been widely used in access control, logistics, attendance, inspection and other fields due to its two-way authentication characteristics. The access control system of some buildings has added NFC recognition function, and residents can use smart wearable devices such as mobile phones or bracelets with NFC function to open the door. Another important application in identity authentication is electronic business cards. When two mobile phones with NFC function are close to each other, the function of exchanging business cards can be realized, which is fast and efficient, and can also avoid the loss and wear of traditional business cards.

[0044] In terms of smart communication, NFC technology can achieve fast communication between mobile terminals, with a short transmission distance and a high security level. Therefore, NFC technology is widely used in the fields of electronic tickets, smart homes, private file transfer, games, social networks, etc.

[0045] In the prior art, in order to meet the various needs of users for NFC and adapt to the increasingly complex environment of mobile terminals, the form of NFC antennas is constantly changing. The following two common NFC antennas are: NFC coil antennas (such as Xiaomi 8, Huawei mate 20Pro, etc.) and NFC diversity antennas (such as Honor 9, Xiaomi 9, etc., Apple's patent CN 105940550, etc.).

[0046] However, the NFC coil antenna is a single-layer coil, which has strict requirements on the size of the coil (for example, the coil area of ​​Xiaomi 8 is 36*31.5mm2, and the coil area of ​​Huawei Mate 20Pro is 46.6*40mm2). Current mobile terminals need to add 5G antennas, and it is difficult to ensure the required area of ​​the NFC coil antenna. The NFC diversity antenna shares a metal frame with the main antenna of the mobile terminal, which not only requires a metal frame, but also affects the performance of the main antenna, causing its power to drop by about 1.5dB. In addition, in order to reduce the mutual influence between the main antenna and the NFC diversity antenna, a large inductor needs to be added at the shared feed end, which is not conducive to device layout.

[0047] Therefore, the present application mainly aims at the technical problems existing in the NFC coil antenna and the NFC diversity antenna in the above-mentioned prior art, and proposes an NFC antenna for a mobile terminal.

[0048] The NFC antenna for mobile terminals of the embodiment of the present application can effectively reduce the occupied area of ​​the NFC antenna by using an FPC antenna for radiation, and has strong applicability in the increasingly complex mobile terminal antenna environment. In addition, a separate FPC antenna is used for radiation, which is not shared with the main antenna. During the design process, the impact on the performance of the main antenna can be reduced by avoiding a certain distance. In addition, the use of large inductance can be avoided, which is beneficial to device layout.

[0049] The following describes the NFC antenna and NFC communication device for a mobile terminal proposed in the embodiments of the present application with reference to the accompanying drawings. Before describing the embodiments of the present invention in detail, for ease of understanding, common technical terms are first introduced:

[0050] FPC is the abbreviation of Flexible Printed Circuit.

[0051] Figure 1 This is a schematic diagram of the structure of an NFC antenna for a mobile terminal provided in Embodiment 1 of the present application.

[0052] In the embodiments of the present application, the mobile terminal may be, for example, a mobile phone, a tablet computer, a personal digital assistant, a wearable device, a vehicle-mounted device, or other hardware device having various operating systems, a touch screen, and / or a display screen.

[0053] like Figure 1 As shown, the NFC antenna for a mobile terminal includes: a substrate 10, a ferrite 20 disposed on the substrate 10, and a first FPC antenna 30 disposed on the ferrite 20, wherein the first FPC antenna 30 includes a first end point and a second end point. It should be noted that, Figure 1 The side view of the NFC antenna is only used as an example.

[0054] In the embodiment of the present application, the NFC antenna includes a first FPC antenna 30, which is a radiator of the NFC antenna and generates NFC performance. The two endpoints of the first FPC antenna 30 are respectively connected to the feeding network and the metal ground. For example, the first endpoint of the first FPC antenna 30 can be a feeding end, and the second endpoint can be a grounding point, or the first endpoint of the first FPC antenna 30 can be a grounding point, and the second endpoint can be a feeding point. The current provided by the feeding network flows into the feeding end, which will generate a current from the feeding end to the grounding point, thereby generating a magnetic field.

[0055] As an example, see Figure 2 , Figure 2This is a top view schematic diagram of the NFC antenna in the embodiment of the present application. Taking the first endpoint as endpoint A and the second endpoint as endpoint B for illustration, where endpoint A is the feeding end connected to the feeding network, and endpoint B is the grounding end connected to the metal ground. When the current provided by the feeding network flows into endpoint A, since endpoint B is grounded, a current of A→B will be generated on the first FPC antenna 30, thereby generating a magnetic field as shown in Figure 3 shown.

[0056] In the embodiment of the present application, the NFC antenna may further include a ferrite 20. The ferrite 20 can shield the influence of the metal environment below the substrate 10 on the NFC performance, and can ensure the normal NFC performance.

[0057] In the embodiment of the present application, the NFC antenna may further include a substrate 10. The substrate 10 may also be referred to as a support plate, which mainly plays a role in supporting the NFC antenna, and can enable the main board pressing plate bracket, the battery, or paste the upper-layer first FPC antenna 30 and the ferrite 20 on the battery back cover using graphite or glue. For example, the substrate 10 may be a battery back cover.

[0058] The NFC antenna of the embodiment of the present application radiates only using one FPC antenna, which can effectively reduce the occupied area of the NFC antenna. At the same time, in the increasingly complex mobile terminal antenna environment, it has strong applicability. Moreover, by using a separate FPC antenna for radiation without sharing with the main antenna, during the design process, the influence on the performance of the main antenna can be reduced by avoiding a certain distance, and at the same time, the use of large inductors can be avoided, which is beneficial to device layout. That is to say, the form of the NFC antenna in the present application is a single line, different from the traditional coil NFC antenna and the diversity shared NFC antenna, which can effectively reduce the area of the NFC antenna and avoid the influence of the NFC antenna on the main antenna of the mobile terminal.

[0059] It should be noted that Figure 1 and Figure 2 only take the NFC antenna as a "one" shape for illustration. In actual application, the NFC antenna may also be an "L" shape, or the NFC antenna may also be a "匚" shape, or the NFC antenna may also be a "U" shape, etc. The present application does not limit this.

[0060] The NFC antenna for mobile terminals in the embodiment of the present application radiates by using one FPC antenna, which can effectively reduce the occupied area of the NFC antenna. At the same time, in the increasingly complex mobile terminal antenna environment, it has strong applicability. Moreover, by using a separate FPC antenna for radiation without sharing with the main antenna, during the design process, the influence on the performance of the main antenna can be reduced by avoiding a certain distance. In addition, the use of large inductors can be avoided, which is beneficial to device layout.

[0061] As a possible implementation method, there are many feeding methods for NFC antennas, such as Figure 1 and Figure 2 The single-ended feeding (or unbalanced feeding) shown in the figure can also be differential feeding (or balanced feeding). Figure 4 , differential feeding is explained in detail.

[0062] Figure 4 This is a schematic diagram of the structure of an NFC antenna for a mobile terminal provided in Embodiment 2 of the present application.

[0063] like Figure 4 As shown, in Figure 1 On the basis of the illustrated embodiment, the NFC antenna for a mobile terminal may further include: a second FPC antenna 40 .

[0064] The second FPC antenna 40 plays a role in conducting current and may include a third terminal and a fourth terminal. It should be noted that: Figure 4 Only a side view of the NFC antenna is used as an example, and the second FPC antenna 40 and the first FPC antenna 30 are respectively located on two sides of the substrate 10 for example.

[0065] In the embodiment of the present application, when differential feeding is adopted, the first FPC antenna 30 is the main radiation area, and the second FPC antenna 40 is the conduction area (mainly plays the role of conducting current). The second FPC antenna 40 can be located below the substrate 10, that is, the second FPC antenna 40 and the first FPC antenna 30 can be located on both sides of the substrate 10 respectively. For example, the second FPC antenna 40 can be a wiring on the main board placed below the substrate 10 or a FPC wiring placed below the mainboard pressure plate bracket.

[0066] The first endpoint may correspond to the third endpoint, and the second endpoint may correspond to the fourth endpoint.

[0067] As a possible implementation, the first endpoint and the third endpoint can be connected to two output ports of the feeding network, that is, the first endpoint and the third endpoint can be feeding terminals. When the feeding network supplies power, a current from the first endpoint → the second endpoint → the fourth endpoint → the third endpoint is generated, thereby generating a magnetic field, wherein the second endpoint and the fourth endpoint are connected, for example, the second endpoint and the fourth endpoint can be connected using a connector (metal spring, etc.).

[0068] As another possible implementation, the second endpoint and the fourth endpoint may be connected to two output ports of the feeding network, that is, the second endpoint and the second endpoint may be feeding terminals. When the feeding network supplies power, a current from the second endpoint → the first endpoint → the third endpoint → the fourth endpoint is generated, thereby generating a magnetic field, wherein the first endpoint and the third endpoint are connected, for example, the first endpoint and the third endpoint may be connected using a connector (metal spring, etc.).

[0069] As an example, see Figure 5 , Figure 5 A side view of the NFC antenna in the embodiment of the present application Figure 1 The second FPC antenna 40 and the first FPC antenna 30 are respectively located on two sides of the substrate 10 .

[0070] Figure 5 In the example, the first endpoint is endpoint A, the second endpoint is endpoint B, and endpoint A is the feeding end, connected to the feeding network, endpoint B is the grounding point, connected to the metal ground, the third endpoint is endpoint A', connected to the feeding network, and the fourth endpoint is endpoint B'. The first FPC antenna 30 of the AB segment is the main radiation area, and the second FPC antenna 40 of the A'B' segment is the conduction area (mainly plays the role of conducting current). Endpoints A and A' are connected to the two output ports of the feeding network, and endpoints B and B' are connected by connectors (metal springs, etc.). When the feeding network is powered, a current of A→B→B'→A' will be generated, thereby generating a magnetic field.

[0071] It should be noted that the second FPC antenna 40 can also be located between the substrate 10 and the ferrite 20. Among them, the second FPC antenna 40 can be set without overlapping with the first FPC antenna 30, that is, staggered and cannot overlap up and down. Therefore, by setting the second FPC antenna 40 and the first FPC antenna 30 without overlapping, the magnetic field generated can be superimposed, the magnetic field strength can be increased, and the NFC performance can be improved. Of course, the second FPC antenna 40 can also be set to overlap with the first FPC antenna 30, and this application does not limit this.

[0072] As another example, see Figure 6 , Figure 6 A side view of the NFC antenna in the embodiment of the present application Figure 2 The second FPC antenna 40 is located between the substrate 10 and the ferrite 20 .

[0073] Figure 6In the example, the first endpoint is endpoint A, the second endpoint is endpoint B, and endpoint A is the feeding end, connected to the feeding network, endpoint B is the grounding point, connected to the metal ground, the third endpoint is endpoint A', connected to the feeding network, and the fourth endpoint is endpoint B'. The first FPC antenna 30 of the AB segment is the main radiation area, and the second FPC antenna 40 of the A'B' segment is the conduction area (mainly plays the role of conducting current). Endpoints A and A' are connected to the two output ports of the feeding network, and endpoints B and B' are connected by connectors (metal springs, etc.). When the feeding network is powered, a current of A→B→B'→A' will be generated, thereby generating a magnetic field.

[0074] It should be noted that Figure 5 and Figure 6 In the example, only endpoint A and endpoint A' are connected to the feeding network, and endpoint B and endpoint B' are connected by a connector (metal spring, etc.). In actual application, endpoint B and endpoint B' can also be connected to the feeding network, and endpoint A and endpoint A' can be connected by a connector (metal spring, etc.). This application does not impose any restrictions on this.

[0075] The NFC antenna of the embodiment of the present application adopts a differential feeding method. When the second FPC antenna 40 and the first FPC antenna 30 are not overlapped, the generated magnetic fields can be superimposed, which can increase the magnetic field strength and improve the NFC performance. In addition, in the present application, the feeding method is diverse, and both conventional differential feeding and single-ended feeding can be adopted, which has diverse selectivity and can improve the applicability of the NFC antenna.

[0076] It should be noted that, in the above embodiment, for ease of understanding, only the length of the first FPC antenna 30 is greater than the length of the ferrite 20 for example. When the length of the first FPC antenna 30 is greater than the length of the ferrite 20, the first end point and the second end point can be suspended relative to the substrate 10. However, in actual application, the present application does not limit the length of the first FPC antenna 30 and the length of the ferrite 20. For example, the length of the ferrite 20 can also be greater than the length of the first FPC antenna 30. In this case, the ferrite 20 can be punched at the end point of the first FPC antenna 30 so that the first FPC antenna 30 can be connected to the NFC chip, or the first FPC antenna 30 can be connected to the second FPC antenna. For example, the ferrite 20 can be punched at the second end point of the first FPC antenna 30 so that the second end point and the fourth end point of the second FPC antenna 40 are connected.

[0077] As a possible implementation, the lengths of the first FPC antenna 30 and the second FPC antenna 40 may be the same, or different, and the present application does not impose any limitation on this. The above embodiment only takes the example that the first FPC antenna 30 and the second FPC antenna 40 have the same length.

[0078] In order to implement the above embodiments, the present application also proposes an NFC communication device for a mobile terminal.

[0079] Figure 7 This is a schematic diagram of the structure of an NFC communication device for a mobile terminal provided in Embodiment 3 of the present application.

[0080] like Figure 7 As shown, the NFC communication device for a mobile terminal includes: an NFC antenna 100 for a mobile terminal proposed in any of the above embodiments, a matching network 200 connected to the NFC antenna 100, and an NFC chip 300 connected to the matching network 200. Thus, the NFC communication function can be realized.

[0081] As an example, see Figure 8 , Figure 8 This is a schematic diagram of the structure of the NFC communication device provided in the fourth embodiment of the present application. In which, single-ended feeding is used as an example, and the NFC chip is used as an NFC integrated circuit (IC) as an example, the NFC IC is connected to the matching network, and the matching network is connected to the NFC antenna feed point. For example, the matching network can be connected to Figure 2 In this way, the NFC communication function can be realized. It should be noted that, Figure 8 In the embodiment, the single-ended feeding is unbalanced feeding, and the NFC antenna outputs a balanced signal, which can be converted into an unbalanced signal through a balanced-unbalanced converter in a matching network.

[0082] As another example, see Fig. 9 , Fig. 9 The structure diagram of the NFC communication device provided in the fifth embodiment of the present application is shown in FIG. In which, differential feeding is used as an example, and the NFC chip is used as an NFC IC as an example, the NFC IC is connected to a matching network, and the matching network is connected to the NFC antenna feed point. For example, the matching network can be connected to Figure 5 or Figure 6 The endpoint A is connected to the endpoint A', or the endpoint B is connected to the endpoint B'. Thus, the NFC communication function can be realized.

[0083] It should be noted that the explanation of the NFC antenna for the mobile terminal in the aforementioned embodiment is also applicable to the NFC communication device for the mobile terminal in this embodiment, and will not be elaborated here.

[0084] The NFC communication device for mobile terminals of the embodiment of the present application can effectively reduce the occupied area of ​​the NFC antenna by using an FPC antenna for radiation, and has strong applicability in the increasingly complex mobile terminal antenna environment. In addition, a separate FPC antenna is used for radiation, which is not shared with the main antenna. During the design process, the impact on the performance of the main antenna can be reduced by avoiding a certain distance. In addition, the use of large inductance can be avoided, which is conducive to device layout.

[0085] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0086] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0087] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0088] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0089] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0090] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0091] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0092] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. An NFC antenna for a mobile terminal, characterized in that: include: substrate; A ferrite disposed on the substrate; A first FPC antenna disposed on the ferrite, wherein the first FPC antenna comprises a first end point and a second end point, the first end point is a feeding end, and the second end point is a grounding point; a second FPC antenna, wherein the second FPC antenna includes a third endpoint and a fourth endpoint, the NFC antenna uses a differential feeding method, and the first FPC antenna and the second FPC antenna are arranged without overlapping to superimpose a magnetic field; The first FPC antenna and the second FPC antenna are single-wire antennas, and the first FPC antenna and the second FPC antenna are both spaced apart from the main antenna of the mobile terminal. The length of the ferrite is greater than that of the first FPC antenna, and the second endpoint is connected to the corresponding fourth endpoint.

2. The NFC antenna for a mobile terminal according to claim 1, characterized in that: The length of the first FPC antenna is greater than the length of the ferrite, so that the first end point and the second end point are suspended relative to the substrate.

3. The NFC antenna for a mobile terminal according to claim 1, characterized in that: The second FPC antenna is located between the substrate and the ferrite.

4. The NFC antenna for a mobile terminal according to claim 1, characterized in that: The second FPC antenna and the first FPC antenna are respectively located on two sides of the substrate.

5. An NFC communication device for a mobile terminal, characterized in that: include: The NFC antenna according to any one of claims 1 to 4; a matching network connected to the NFC antenna; An NFC chip connected to the matching network.

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