NFC antenna assembly and electronic equipment

Abstract

The invention provides an NFC antenna assembly. The NFC antenna assembly comprises a first NFC antenna, an NFC chip, a first transmitting processing circuit and a first receiving processing circuit. The first NFC antenna supports receiving and transmitting of electromagnetic wave signals of an NFC communication frequency band, the first NFC antenna comprises a first end and a second end which are opposite to each other, and the second end is grounded. The NFC chip comprises a first transmitting port and a first receiving port. The first emission processing circuit is at least coupled between the first emission port of the NFC chip and the first end of the first NFC antenna, and is used for at least realizing matching tuning of the NFC communication frequency band. The first receiving processing circuit is coupled between the first receiving port of the NFC chip and the first end of the first NFC antenna, and is used for at least realizing filtering of an electromagnetic wave signal of an NFC communication frequency band received by the first NFC antenna. The invention further provides electronic equipment. The NFC antenna can meet the setting requirement of the NFC antenna in a limited space.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to an NFC antenna component and an electronic device having the NFC antenna component. Background Art

[0002] At present, electronic devices such as mobile phones and tablets have more and more functions, which greatly enriched people's lives. For example, now electronic devices such as mobile phones and tablets can support card swiping functions for buses, subways, access control, etc., or support card swiping for quick payment, which greatly facilitates people's lives. The card swiping function of current electronic devices such as mobile phones and tablets is mostly implemented using NFC (Near Field Communication) solutions. At present, due to the increasing popularity of metal back covers, some NFC antennas are set near the frame of electronic devices to use the black edge of the display as a clear area. Current NFC antennas are usually double-ended, which results in the NFC antenna being limited in its setting position due to limitations such as feeding connections. Therefore, how to improve the flexibility of the setting position of the NFC antenna in a limited space has become a problem that needs to be solved. Summary of the invention

[0003] The present application provides an NFC antenna assembly and an electronic device.

[0004] In a first aspect, an NFC antenna assembly is provided, comprising a first NFC antenna, an NFC chip, a first transmitting processing circuit, and a first receiving processing circuit. The first NFC antenna is used to support the transmission and reception of electromagnetic wave signals in the NFC communication frequency band, and the first NFC antenna comprises a first end and a second end relative to each other, and the second end is grounded. The NFC chip comprises a first transmitting port and a first receiving port. The first transmitting processing circuit is at least coupled between the first transmitting port of the NFC chip and the first end of the first NFC antenna, and is used to at least achieve matching tuning of the NFC communication frequency band. The first receiving processing circuit is coupled between the first receiving port of the NFC chip and the first end of the first NFC antenna, and is used to at least achieve filtering of electromagnetic wave signals in the NFC communication frequency band received by the first NFC antenna.

[0005] In a second aspect, an electronic device is also provided, the electronic device comprising an NFC antenna assembly, the NFC antenna assembly comprising a first NFC antenna, an NFC chip, a first transmitting processing circuit and a first receiving processing circuit. The first NFC antenna is used to support the transmission and reception of electromagnetic wave signals in the NFC communication frequency band, the first NFC antenna comprises a first end and a second end relative to each other, and the second end is grounded. The NFC chip comprises a first transmitting port and a first receiving port. The first transmitting processing circuit is at least coupled between the first transmitting port of the NFC chip and the first end of the first NFC antenna, and is used to at least achieve matching tuning of the NFC communication frequency band. The first receiving processing circuit is coupled between the first receiving port of the NFC chip and the first end of the first NFC antenna, and is used to at least achieve filtering of electromagnetic wave signals in the NFC communication frequency band received by the first NFC antenna.

[0006] In the NFC antenna assembly and electronic device of the present application, since only the first end of the first NFC antenna is connected to the NFC chip to receive power feed, and the second end of the first NFC antenna is grounded, and since the grounding can be directly connected to structures such as the middle frame or the metal back shell without being connected to the mainboard, the setting position of the first NFC antenna can be more flexible, and the setting requirements of the NFC antenna can be met in an environment where the clearance area is getting smaller and smaller. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background technology, the drawings required for use in the embodiments of the present application or the background technology will be described below.

[0008] Figure 1 This is a structural block diagram of an NFC antenna assembly in some embodiments of the present application.

[0009] Figure 2 FIG. 4 is another structural block diagram of an NFC antenna assembly in some embodiments of the present application.

[0010] Figure 3 It is a further structural schematic diagram of the NFC antenna assembly in some embodiments of the present application.

[0011] Figure 4 This is another structural schematic diagram of an NFC antenna assembly in some embodiments of the present application.

[0012] Figure 5 This is another structural schematic diagram of an NFC antenna assembly in some embodiments of the present application.

[0013] Figure 6 Schematic diagram of a more specific circuit structure of an NFC antenna assembly in some embodiments of the present application.

[0014] Figure 7 A further structural block diagram of an NFC antenna assembly in some embodiments of the present application.

[0015] Figure 8 Another further structural block diagram of an NFC antenna assembly in some embodiments of the present application.

[0016] Fig. 9 This is another structural block diagram of an NFC antenna assembly in some embodiments of the present application.

[0017] Fig.10 Another more specific circuit structure diagram of the NFC antenna assembly in some embodiments of the present application.

[0018] Fig.11 This is another more specific circuit structure diagram of the NFC antenna assembly in some embodiments of the present application.

[0019] Fig.12 This is another more specific circuit structure diagram of the NFC antenna assembly in some embodiments of the present application.

[0020] Fig.13 Schematic diagram of other more specific circuit structures of the NFC antenna assembly in some embodiments of the present application.

[0021] Fig.14 Another further structural block diagram of an NFC antenna assembly in some embodiments of the present application.

[0022] Fig.15 This is yet another structural block diagram of an NFC antenna assembly in some embodiments of the present application.

[0023] Fig.16 This is a structural block diagram of an electronic device in some embodiments of the present application.

[0024] Fig.17 It is a schematic plan view of an electronic device in some embodiments of the present application.

[0025] Fig.18 Another schematic plan view of an electronic device in some embodiments of the present application.

[0026] Fig.19 It is another schematic plan view of the electronic device in some embodiments of the present application. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In the description of the embodiments of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "thickness", "width", etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than implying or indicating that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In the description of the embodiments of the present invention, the terms "first", "second", etc. are not specific, but are used to distinguish objects with the same name. If there is a description, the objects with the same name referred to by the terms "first", "second", etc. may be the same object. Among them, in this application, the term "A and / or B" includes multiple situations of "A", "B" and "A and B". Among them, the terms "connection", "coupling", etc. in this application include the meanings of "electrical connection", "direct connection" and / or "indirect connection".

[0029] See also Figure 1 , is a structural block diagram of the NFC antenna assembly 100 in some embodiments of the present application. Figure 1 As shown, the NFC antenna assembly 100 includes a first NFC antenna 1, an NFC chip 2, a first transmitting processing circuit 3, and a first receiving processing circuit 4. The first NFC antenna 1 is used to support the transmission and reception of electromagnetic wave signals in the NFC communication frequency band, and the first NFC antenna 1 includes a first end 1a and a second end 1b opposite to each other, and the second end 1b is grounded. The NFC chip 2 includes a first transmitting port TX1 and a first receiving port RX1, and the first transmitting processing circuit 3 is at least coupled between the first transmitting port TX1 of the NFC chip 2 and the first end 1a of the first NFC antenna 1, and is used to at least achieve matching tuning of the NFC communication frequency band. The first receiving processing circuit 4 is coupled between the first receiving port RX1 of the NFC chip 2 and the first end 1a of the first NFC antenna 1, and is used to at least achieve filtering of electromagnetic wave signals in the NFC communication frequency band received by the first NFC antenna 1.

[0030] Among them, in the existing scheme, the NFC chip generally includes two transmitting ports, and the two transmitting ports of the NFC chip are respectively connected to the two ends of the NFC antenna to realize differential feeding of the NFC antenna. Therefore, in the existing scheme, both ends of the NFC antenna need to be connected to the NFC chip located on the main board through a feeding connection structure such as a spring clip. However, in the existing scheme, it is often inconvenient to set the feeding connection structure. For example, one end of the NFC antenna is far away from the main board, which leads to a relatively limited setting position of the NFC antenna, and often leads to a position conflict with other antennas of the electronic device, which affects the performance of the NFC antenna or other antennas, or a small board needs to be set up and connected to the main board through a coaxial line to realize feeding, which increases the cost and also leads to a large feeding transmission loss. In the present application, only the first end 1a is connected to the NFC chip 2 to receive the feed, and the second end 1b of the first NFC antenna 1 is grounded. Since the grounding can be directly connected to structures such as the middle frame or the metal back shell, there is no need to connect to the mainboard, which can make the setting position of the first NFC antenna 1 more flexible, and there is no need to set up an additional small board and there is no need to connect to the mainboard through a coaxial line, which can reduce costs and reduce feed transmission losses. In addition, in the present application, for the first NFC antenna 1, only the first transmitting port TX1 and the first receiving port RX1 of the NFC chip 2 are needed, and the circuit design is simple and the cost is low.

[0031] Among them, in some embodiments, the first transmission processing circuit 3 implements matching tuning of the NFC communication frequency band, which may refer to implementing matching tuning in the process of the first NFC antenna 1 transmitting an electromagnetic wave signal in the NFC communication frequency band, and the matching tuning may include impedance matching and frequency tuning, which is beneficial to improving NFC communication performance.

[0032] In some embodiments, the first receiving and processing circuit 4 implements filtering of the electromagnetic wave signal in the NFC communication frequency band received by the first NFC antenna 1 to filter out noise in other frequency bands other than the NFC communication frequency band.

[0033] In some embodiments, the first receiving processing circuit 4 can also be used to achieve a certain degree of power attenuation of the electromagnetic wave signal of the NFC communication frequency band received by the first NFC antenna 1, so that the power of the electromagnetic wave signal of the NFC communication frequency band input to the first receiving port RX1 meets the processing requirements of the NFC chip 2. Generally speaking, the NFC chip has certain requirements on the power of the electromagnetic wave signal of the NFC communication frequency band received, and the power of the electromagnetic wave signal of the NFC communication frequency band received needs to be within a preset range in order to better implement the processing of the received signal. Therefore, the first receiving processing circuit 4 is also used to achieve a certain degree of power attenuation of the electromagnetic wave signal of the NFC communication frequency band received by the first NFC antenna 1, which can avoid the received signal power being too strong and being outside the preset range.

[0034] Among them, the Figure 1 The structural block diagram shown in the figure is only for illustrating that the NFC antenna assembly 100 includes at least the first transmission processing circuit 3 for transmission processing such as matching tuning, and another circuit part of the first reception processing circuit 4 for reception processing such as filtering, and does not mean that the first transmission processing circuit 3 and the first reception processing circuit 4 must be two independent circuits. In some embodiments, the first transmission processing circuit 3 and the first reception processing circuit 4 may share part of the circuit structure.

[0035] See also Figure 2 , is another structural block diagram of the NFC antenna assembly 100 in some embodiments of the present application.

[0036] like Figure 2 As shown, the NFC chip 2 also includes a second transmitting port TX2, and the NFC antenna assembly 100 also includes an output conversion circuit 5, the output conversion circuit 5 includes two input terminals 5a and an output terminal 5b, the two input terminals 5a are respectively connected to the first transmitting port TX1 and the second transmitting port TX2, and the output terminal 5b is connected to the first transmitting processing circuit 3, and the output conversion circuit 5 is used to convert the first NFC feed signal output by the first transmitting port TX1 and the second NFC feed signal output by the second transmitting port TX2 into one NFC output feed signal, and output it through the output terminal 5b.

[0037] That is, in some embodiments, the NFC chip 2 includes two transmitting ports, namely the first transmitting port TX1 and the second transmitting port TX2, and is fed through the two transmitting ports. The first NFC feeding signal output by the first transmitting port TX1 and the second NFC feeding signal output by the second transmitting port TX2 are converted into one NFC output feeding signal through the output conversion circuit 5, which can help suppress common-mode interference signals, improve NFC communication performance, and meet the requirement that the first NFC antenna 1 only needs single-ended feeding.

[0038] Thus, in some embodiments, the first transmission processing circuit 3 is at least coupled between the first transmission port TX1 of the NFC chip 2 and the first end 1a of the first NFC antenna 1, which may refer to that one end of the first transmission processing circuit 3 is connected / coupled to the first transmission port TX1 of the NFC chip 2 through the output conversion circuit 5, and the other end of the first transmission processing circuit 3 is coupled to the first end 1a of the first NFC antenna 1, and is at least coupled between the first transmission port TX1 of the NFC chip 2 and the first end 1a of the first NFC antenna 1.

[0039] In some embodiments, since the two input terminals 5a of the output conversion circuit 5 are respectively connected to the first transmitting port TX1 and the second transmitting port TX2, in some embodiments, the first transmitting processing circuit 3 is at least coupled between the first transmitting port TX1 of the NFC chip 2 and the first end 1a of the first NFC antenna 1, which may also refer to the first transmitting processing circuit 3 being coupled between the first transmitting port TX1 of the NFC chip 2, the second transmitting port TX2 and the first end 1a of the first NFC antenna 1.

[0040] Among them, the output conversion circuit 5 converts the first NFC feed signal output by the first transmitting port TX1 and the second NFC feed signal output by the second transmitting port TX2 into an NFC output feed signal, and after outputting it through the output terminal 5b, it can be transmitted to the first end 1a of the first NFC antenna 1 through the first transmitting processing circuit 3, thereby stimulating the first NFC antenna 1 to transmit the electromagnetic wave signal of the NFC communication frequency band.

[0041] In some embodiments, the first NFC feed signal and the second NFC feed signal are both AC signals with the same amplitude and frequency and opposite phases, and the NFC output feed signal is also an AC signal with the same frequency as the first NFC feed signal and the second NFC feed signal.

[0042] That is, in some embodiments, the first NFC feeding signal and the second NFC feeding signal respectively outputted by the first transmitting port TX1 and the second transmitting port TX2 of the NFC chip 2 are differential signals with equal frequency and amplitude but opposite phases, wherein the differential signal is conducive to suppressing common-mode interference signals. The output conversion circuit 5 converts the first NFC feeding signal outputted by the first transmitting port TX1 and the second NFC feeding signal outputted by the second transmitting port TX2 into one NFC output feeding signal of the same frequency, which can meet the requirement that the first NFC antenna 1 only needs single-ended feeding.

[0043] In some embodiments, the frequencies of the NFC output feed signal, the first NFC feed signal, and the second NFC feed signal are frequencies corresponding to the NFC communication frequency band, for example, the center frequency of the NFC communication frequency band, wherein the NFC output feed signal is transmitted to the first end 1a of the first NFC antenna 1, and can be emitted through the first NFC antenna 1, that is, the electromagnetic wave signal of the NFC communication frequency band.

[0044] See also Figure 3 , which is a further structural diagram of the NFC antenna assembly 100 in some embodiments of the present application.

[0045] Among them, Figure 3 As shown, the output conversion circuit 5 includes a phase adjustment circuit 51, and the phase adjustment circuit 51 is used to adjust the phases of the first NFC feeding signal and the second NFC feeding signal to be the same and then synthesize them to generate the NFC output feeding signal.

[0046] That is, in some embodiments, the output conversion circuit 5 may include a phase adjustment circuit 51, which can generate the NFC output feed signal with the same frequency by adjusting the phases of the first NFC feed signal and the second NFC feed signal to be the same and then synthesizing them.

[0047] Among them, Figure 3As shown, the phase adjustment circuit 51 includes a first phase adjustment element 511 and a second phase adjustment element 512, one end of the first phase adjustment element 511 is connected to the first transmitting port TX1 and serves as an input end 5a of the output conversion circuit 5, one end of the second phase adjustment element 512 is connected to the second transmitting port TX2 and serves as another input end 5a of the output conversion circuit 5, the other end of the first phase adjustment element 511 and the other end of the second phase adjustment element 512 are connected to serve as the output end 5b, the phase of the first NFC feeding signal after passing through the first phase adjustment element 511 is the same as the phase of the second NFC feeding signal after passing through the second phase adjustment element 512, and the NFC output feeding signal is synthesized at the connection point of the other end of the first phase adjustment element 511 and the other end of the second phase adjustment element 512, that is, at the output end 5b, wherein the amplitude of the NFC output feeding signal is the sum of the amplitudes of the first NFC feeding signal and the second NFC feeding signal.

[0048] That is, in some embodiments, Figure 3 As shown, the phase modulation circuit 51 includes two phase modulation elements, which respectively modulate the phases of the first NFC feed signal output by the first transmitting port TX1 and the second NFC feed signal output by the second transmitting port TX2, so that the phases of the first NFC feed signal and the second NFC feed signal after the phase modulation are the same, and then they are synthesized. Since the phases are the same, the two are equivalent to being superimposed on each other, and the amplitude of the NFC output feed signal is the sum of the amplitudes of the first NFC feed signal and the second NFC feed signal. In this way, the performance of the NFC chip 2 can be fully utilized and the transmission power can be effectively improved.

[0049] In some embodiments, the first phase adjusting element 511 is one of an inductor and a capacitor, and the second phase adjusting element 512 is the other of an inductor and a capacitor.

[0050] That is, in some embodiments, the first phase adjustment element 511 and the second phase adjustment element 512 may be an inductor and a capacitor, or a capacitor and an inductor, respectively. Since the inductor and the capacitor have opposite phase adjustment directions, when the first NFC feed signal and the second NFC feed signal respectively outputted by the first transmission port TX1 and the second transmission port TX2 of the NFC chip 2 are differential signals with equal frequency and amplitude but opposite phases, the phases of the two NFC feed signals can be adjusted in opposite directions by the inductor with a smaller inductance value and the capacitor with a smaller capacitance value. For example, the phase of the first NFC feed signal can be adjusted backward by 90°, that is, +90°, by the first phase adjustment element 511, and the phase of the second NFC feed signal can be adjusted forward by 90°, that is, -90°, by the second phase adjustment element 512. Since the two originally differed by 180°, after adjustment, the phase difference is increased by 180°, that is, at this time, the phase difference between the two is 360°, that is, 0°, and the same phase is achieved.

[0051] in, Figure 3 In the embodiment, the first phase adjusting element 511 is an inductor and the second phase adjusting element 512 is a capacitor. Obviously, as mentioned above, in some embodiments, the first phase adjusting element 511 may be a capacitor and the second phase adjusting element 512 may be an inductor.

[0052] In some embodiments, the first phase adjusting element 511 and the second phase adjusting element 512 may both be inductors or capacitors, and the first phase adjusting element 511 and the second phase adjusting element 512 may have different parameter values, such as different inductance values ​​or different capacitance values, so that even if the phase adjustment directions of the two are the same, the first NFC feeding signal and the second NFC feeding signal may be adjusted to the same phase. For example, the phase of the first NFC feeding signal may be adjusted backward by 90°, i.e., +90°, through the first phase adjusting element 511, and the phase of the second NFC feeding signal may be adjusted backward by 270°, i.e., +270°, through the second phase adjusting element 512. Since the phase difference between the two was originally 180°, after adjustment, the phase difference is increased by 180°, i.e., at this time, the phase difference between the two is 360°, i.e., 0°, and the same phase can also be achieved.

[0053] See also Figure 4 , which is another further structural schematic diagram of the NFC antenna assembly 100 in some embodiments of the present application.

[0054] like Figure 4As shown, in some embodiments, the output conversion circuit 5 includes a first balun circuit 52, the first balun circuit 52 includes a first input coil 521 and a first output coil 522, the two ends of the first input coil 521 are respectively connected to the first transmitting port TX1 and the second transmitting port TX2 and serve as two input ends 5a of the output conversion circuit 5, one end of the first output coil 522 is grounded, and the other end is connected to the first transmitting processing circuit 3 and serves as the output end 5b of the output conversion circuit 5, the first balun circuit 52 converts the first NFC feed signal output by the first transmitting port TX1 and the second NFC feed signal output by the second transmitting port TX2 into one NFC output feed signal, and outputs it through the output end 5b, that is, outputs it through the other end of the first output coil 522 connected to the first transmitting processing circuit 3.

[0055] That is, in some embodiments, the output conversion circuit 5 may also include a first balun circuit 52, wherein the balun circuit has a good common-mode noise suppression effect and can better suppress common-mode interference signals, and the first balun circuit can also convert the first NFC feeding signal output by the first transmitting port TX1 and the second NFC feeding signal output by the second transmitting port TX2 into one NFC output feeding signal of the same frequency, which can meet the requirement that the first NFC antenna 1 only needs single-ended feeding.

[0056] In some embodiments, the turns ratio of the first input coil 521 and the first output coil 522 of the first balun circuit 52 is 1:1, and the first balun circuit 52 can be roughly similar to a transformer with a turns ratio of 1:1. In some embodiments, the frequency of the NFC output feed signal converted and output by the first balun circuit is the same as the frequency of the first NFC feed signal and the second NFC feed signal, and the amplitude is also the same as the amplitude of the first NFC feed signal and the second transmitting port TX2. In some embodiments, although the first balun circuit 52 does not improve the transmission power, it is better than the phase modulation circuit 51 in suppressing common-mode interference signals.

[0057] Wherein, in some embodiments, Figure 3 and Figure 4 As shown in the figure, the NFC chip 2 further includes a second receiving port RX2, and the second receiving port RX2 is grounded through a receiving filter capacitor Cr1.

[0058] That is, in some embodiments, when the NFC chip 2 further includes a second transmitting port TX2, the NFC chip 2 may further include a second receiving port RX2, wherein, since only the first NFC antenna 1 is included, the second receiving port RX2 is generally suspended, but may be subject to coupling interference from other nearby components. Therefore, in the present application, the second receiving port RX2 is grounded through the receiving filter capacitor Cr1, which can effectively conduct interference signals generated by other components due to coupling interference to the ground, and avoid being conducted to the NFC chip through the second receiving port RX2.

[0059] Therefore, in the present application, the NFC antenna assembly 100 can further receive the filter capacitor Cr1, and the second receiving port RX2 can be grounded through the receiving filter capacitor Cr1, and the received interference signal can be conducted to the ground through the receiving filter capacitor Cr1 to filter out the interference signal, thereby effectively improving.

[0060] In some embodiments, since the coupling interference of other nearby components is generally small, it is likely to be outside the preset power range that the NFC chip 2 can normally handle, and even if it is conducted to the NFC chip through the second receiving port RX2, it will not have any effect. Therefore, in some embodiments, the second receiving port RX2 can also be suspended without being grounded through the receiving filter capacitor Cr1.

[0061] See also Figure 5 , is another structural schematic diagram of the NFC antenna assembly 100 in some embodiments of the present application.

[0062] In some embodiments, as described above, the NFC chip further includes a second transmitting port TX2 and a second receiving port RX2, wherein, in some embodiments, the second transmitting port TX2 is suspended, and the second receiving port RX2 is grounded through a receiving filter capacitor Cr1.

[0063] That is, in some embodiments, the NFC chip 2 further includes a second transmitting port TX2 and a second receiving port RX2, and the second transmitting port TX2 is suspended without feeding output, while the second receiving port RX2 is grounded through the receiving filter capacitor Cr1, thereby effectively conducting interference signals generated by coupling interference of other components to the ground, and avoiding conduction to the NFC chip through the second receiving port RX2.

[0064] Furthermore, in some embodiments, the NFC chip 2 can also realize feeding output only through the first transmitting port TX1, that is, the first transmitting port TX1 can output a feeding signal, such as the aforementioned first feeding signal, and can be transmitted to the first end 1a of the first NFC antenna 1 through the first transmitting processing circuit 3, thereby stimulating the first NFC antenna 1 to transmit an electromagnetic wave signal in the NFC communication frequency band.

[0065] Among them, the feeding output is realized only through the first transmitting port TX1. Compared with adding the output conversion circuit 5 as mentioned above, it can effectively simplify the structure and save costs, and the antenna performance can basically meet the requirements.

[0066] In some embodiments, even if the second transmitting port TX2 is suspended, the NFC chip 2 can still transmit the second NFC feeding signal to the second transmitting port TX2, that is, the first transmitting port TX1 and the second transmitting port TX2 of the NFC chip 2 still have the first NFC feeding signal and the second NFC feeding signal as differential signals with equal frequency and amplitude but opposite phases, but because the second transmitting port TX2 is not connected to the subsequent circuit, the second NFC feeding signal of the second transmitting port TX2 is not output. In some embodiments, because the second transmitting port TX2 is suspended, the NFC chip 2 may not transmit the second NFC feeding signal to the second transmitting port TX2.

[0067] See also Figure 6 , which is a more specific circuit structure diagram of the NFC antenna assembly 100 in some embodiments of the present application.

[0068] in, Figure 6 The specific circuit structures of the first transmitting processing circuit 3 and the first receiving processing circuit 4 are mainly illustrated in FIG. Figure 6 Mainly in Figure 2 The specific circuit structures of the first transmitting processing circuit 3 and the first receiving processing circuit 4 are schematically shown on the basis of the structure shown in FIG. 1 . Obviously, the first transmitting processing circuit 3 and the first receiving processing circuit 4 of the NFC antenna assembly 100 in any of the aforementioned embodiments can be Figure 6 The circuit structure shown.

[0069] In some embodiments, the first transmission processing circuit 3 and the first reception processing circuit 4 share part of the circuit structure.

[0070] That is, in some embodiments, part of the circuit structure is shared by the first transmit processing circuit 3 and the first receive processing circuit 4, thereby effectively improving the flexibility of circuit setting and saving circuit structure, which is conducive to cost saving.

[0071] In some embodiments, Figure 6 As shown, the first transmitting processing circuit 3 includes a first capacitor C1 and a second capacitor C2, and the first receiving processing circuit 4 includes the first capacitor C1 and a third capacitor C3. One end of the first capacitor C1 is coupled to the first end 1a of the first NFC antenna 1, and the other end is grounded. The second capacitor C2 is coupled between the first transmitting port TX1 and the remote end of the first capacitor C1, that is, coupled between the first transmitting port TX1 and the end of the first capacitor C1 coupled to the first end 1a of the first NFC antenna 1. The third capacitor C3 is coupled between the first receiving port RX1 and the remote end of the first capacitor C1. The first capacitor C1 and the second capacitor C2 cooperate to at least achieve matching tuning of the NFC communication frequency band. The first capacitor C1 and the third capacitor C3 cooperate to at least achieve filtering of electromagnetic wave signals of the NFC communication frequency band received by the first NFC antenna 1.

[0072] Thus, in some embodiments, the first transmitting processing circuit 3 includes a first capacitor C1 and a second capacitor C2, the first receiving processing circuit 4 includes the first capacitor C1 and a third capacitor C3, the first transmitting processing circuit 3 and the first receiving processing circuit 4 share the first capacitor C1, and the first capacitor C1 and the second capacitor C2 can at least achieve matching tuning of the NFC communication frequency band, and the first capacitor C1 and the third capacitor C3 can at least achieve filtering of the electromagnetic wave signal of the NFC communication frequency band received by the first NFC antenna 1.

[0073] In some embodiments, the capacitance values ​​of the first capacitor C1, the second capacitor C2 and the third capacitor can be set as needed to ensure that at least the matching tuning of the NFC communication frequency band can be achieved through the first capacitor C1 and the second capacitor C2, and at least the filtering of the electromagnetic wave signal of the NFC communication frequency band received by the first NFC antenna 1 can be achieved through the first capacitor C1 and the third capacitor C3.

[0074] In some embodiments, the first capacitor C1 is used to achieve frequency tuning of the NFC communication frequency band, and the second capacitor C2 is used to achieve impedance matching of the NFC communication frequency band, thereby achieving matching tuning of the NFC communication frequency band. Therefore, the value of the first capacitor C1 can be set according to the need to achieve frequency tuning of the NFC communication frequency band, and the value of the second capacitor C2 can be set according to the need to achieve impedance matching of the NFC communication frequency band.

[0075] Among them, in some embodiments, the first capacitor C1 can be selected according to the need to achieve frequency tuning of the NFC communication frequency band, and the second capacitor C2 can be selected according to the need to achieve impedance matching of the NFC communication frequency band, and then the corresponding capacitance value can be determined according to the filtering of the electromagnetic wave signal of the NFC communication frequency band received by the first NFC antenna 1, and then the difference between the capacitance value required for filtering the electromagnetic wave signal of the NFC communication frequency band received by the first NFC antenna 1 and the capacitance value of the first capacitor C1 can be determined as the capacitance value of the third capacitor C3.

[0076] In some embodiments, as mentioned above, the first receiving processing circuit 4 can also be used to achieve a certain degree of power attenuation of the electromagnetic wave signal of the NFC communication frequency band received by the first NFC antenna 1, so that the power of the electromagnetic wave signal of the NFC communication frequency band input to the first receiving port RX1 meets the processing requirements of the NFC chip 2, that is, the first capacitor C1 and the third capacitor C3 can also cooperate to achieve a certain degree of power attenuation of the electromagnetic wave signal of the NFC communication frequency band received by the first NFC antenna 1. Therefore, in some embodiments, the difference between the capacitance value required to determine the filtering and power attenuation of the electromagnetic wave signal of the NFC communication frequency band received by the first NFC antenna 1 and the capacitance value of the first capacitor C1 can be the capacitance value of the third capacitor C3.

[0077] In this application, Figure 6 The circuit structure of the first transmission processing circuit 3 and the first reception processing circuit 4 shown can effectively at least achieve matching tuning of the NFC communication frequency band, and at least achieve filtering of the electromagnetic wave signal of the NFC communication frequency band received by the first NFC antenna 1.

[0078] See also Figure 7 , which is a further structural block diagram of the NFC antenna assembly 100 in some embodiments of the present application.

[0079] like Figure 7As shown, the NFC antenna assembly 100 includes the aforementioned first NFC antenna 1, NFC chip 2, first transmission processing circuit 3, and first reception processing circuit 4, the NFC chip 2 also includes a second transmission port TX2 and a second reception port RX2, and the NFC antenna assembly 100 also includes a second NFC antenna 6, a second transmission processing circuit 7, and a second reception processing circuit 8.

[0080] The second NFC antenna 6 also supports the transmission and reception of electromagnetic wave signals in the NFC communication frequency band, and the second NFC antenna 6 includes a third end 6a and a fourth end 6b opposite to each other, and the fourth end 6b is grounded. The second transmission processing circuit 7 is at least coupled between the second transmission port TX2 and the third end 6a of the second NFC antenna 6, and is used to at least achieve matching tuning of the NFC communication frequency band. The second reception processing circuit 8 is coupled between the second reception port RX2 and the third end 6a of the second NFC antenna 6, and is used to at least achieve filtering of the electromagnetic wave signals in the NFC communication frequency band received by the second NFC antenna 6.

[0081] That is, in some embodiments, the NFC antenna assembly 100 further includes a second NFC antenna 6, and the second NFC antenna 6 is also a structure with one end grounded and only single-end feeding is required. The NFC chip 2 further includes a second transmitting port TX2 and a second receiving port RX2, and is respectively connected to the third end 6a of the second NFC antenna 6 through a second transmitting processing circuit 7 and a second receiving processing circuit 8, so that the second NFC antenna 6 can also transmit and receive electromagnetic wave signals in the NFC communication frequency band, thereby meeting the needs of multiple NFC antennas, and making full use of the performance of the NFC chip 2 to realize the transmission and reception of multiple NFC antennas. Moreover, since the second NFC antenna 6 receives feeding by being connected to the NFC chip 2 only through the third end 6a, the setting position of the second NFC antenna 6 can also be made more flexible.

[0082] The matching tuning of the NFC communication frequency band implemented by the second transmission processing circuit 7 refers to the matching tuning of the electromagnetic wave signal of the NFC communication frequency band implemented by the second NFC antenna 6 .

[0083] See also Figure 8 , which is another further structural block diagram of the NFC antenna assembly 100 in some embodiments of the present application.

[0084] like Figure 8As shown, similarly, the NFC chip 2 also includes a second transmitting port TX2 and a second receiving port RX2, and the NFC antenna assembly 100 also includes a second NFC antenna 6, a second transmitting processing circuit 7 and a second receiving processing circuit 8. The second NFC antenna 6 also supports the transmission and reception of electromagnetic wave signals in the NFC communication frequency band. The second NFC antenna 6 includes a third end 6a and a fourth end 6b opposite to each other, and the fourth end 6b is grounded. Figure 8 As shown, in some embodiments, the NFC antenna assembly 100 further includes the aforementioned output conversion circuit 5, that is, also includes the aforementioned Figure 2 The output conversion circuit 5 shown. That is, the output conversion circuit 5 includes two input terminals 5a and one output terminal 5b, the two input terminals 5a are respectively connected to the first transmitting port TX1 and the second transmitting port TX2, the output terminal 5b is connected to the first transmitting processing circuit 3, and the output conversion circuit 5 is used to convert the first NFC feeding signal output by the first transmitting port TX1 and the second NFC feeding signal output by the second transmitting port TX2 into one NFC output feeding signal, and output it through the output terminal 5b. Figure 8 As shown, the second transmitting processing circuit 7 is connected between the output terminal 5b of the output conversion circuit 5 and the third terminal 6a of the second NFC antenna 6, and is used to at least realize the matching tuning of the NFC communication frequency band; the second receiving processing circuit 8 is coupled between the second receiving port RX2 of the NFC chip 2 and the third terminal 6a of the second NFC antenna 6, and is used to at least realize the filtering of the electromagnetic wave signal of the NFC communication frequency band received by the second NFC antenna 6.

[0085] That is, in some embodiments, the second transmission processing circuit 7 and the first transmission processing circuit 3 can both be connected to the output end 5b of the output conversion circuit 5, and the output end 5b of the output conversion circuit 5 can serve as a common feeding port for the first NFC antenna 1 and the second NFC antenna 6.

[0086] Among them, as mentioned above, the first NFC feed signal output by the first transmitting port TX1 and the second NFC feed signal output by the second transmitting port TX2 are converted into one NFC output feed signal through the output conversion circuit 5, which can be beneficial to suppress common-mode interference signals, improve NFC communication performance, and can respectively meet the requirements that the first NFC antenna 1 and the second NFC antenna 6 only need single-ended feeding.

[0087] The specific structure of the output conversion circuit 5 can be found in the above Figure 3 and Figure 4 The specific structure shown will not be repeated here.

[0088] See also Fig. 9 , which is yet another structural block diagram of the NFC antenna assembly 100 in some embodiments of the present application.

[0089] like Fig. 9 As shown, similarly, the NFC chip 2 also includes a second transmitting port TX2 and a second receiving port RX2, and the NFC antenna assembly 100 also includes a second NFC antenna 6, a second transmitting processing circuit 7 and a second receiving processing circuit 8. The second NFC antenna 6 also supports the transmission and reception of electromagnetic wave signals in the NFC communication frequency band. The second NFC antenna 6 includes a third end 6a and a fourth end 6b opposite to each other, and the fourth end 6b is grounded. Fig. 9 As shown, in some embodiments, the NFC antenna assembly 100 further includes the two output conversion circuits 5 mentioned above, that is, it also includes the aforementioned Figure 2 The two output conversion circuits 5 are shown.

[0090] That is, Fig. 9 As shown, one of the output conversion circuits 5 includes two input terminals 5a and one output terminal 5b, the two input terminals 5a are respectively connected to the first transmitting port TX1 and the second transmitting port TX2, the output terminal 5b is connected to the first transmitting processing circuit 3, and the output conversion circuit 5 is used to convert the first NFC feeding signal output by the first transmitting port TX1 and the second NFC feeding signal output by the second transmitting port TX2 into one NFC output feeding signal, and output it through the output terminal 5b, and then transmit it to the first NFC antenna 1 through the first transmitting processing circuit 3 to excite the first NFC antenna 1 to transmit an electromagnetic wave signal in the NFC communication frequency band. Another output conversion circuit 5 also includes two input terminals 5a and an output terminal 5b. The two input terminals 5a of the other output conversion circuit 5 are also respectively connected to the first transmitting port TX1 and the second transmitting port TX2. The output terminal 5b of the other output conversion circuit 5 is connected to the second transmitting processing circuit 7. The other output conversion circuit 5 is also used to convert the first NFC feeding signal output by the first transmitting port TX1 and the second NFC feeding signal output by the second transmitting port TX2 into one NFC output feeding signal, and output it through the corresponding output terminal 5b, and then transmit it to the second NFC antenna 6 through the second transmitting processing circuit 7 to excite the second NFC antenna 6 to transmit an electromagnetic wave signal in the NFC communication frequency band.

[0091] Therefore, in another embodiment, by providing two output conversion circuits 5, NFC output feeding signals for the first NFC antenna 1 and the second NFC antenna 6 are generated respectively, which can also be beneficial to suppress common-mode interference signals, improve NFC communication performance, and can respectively meet the requirements that the first NFC antenna 1 and the second NFC antenna 6 only need single-ended feeding.

[0092] Wherein, when the NFC antenna assembly 100 further includes Figure 8 and Fig. 9 When the output conversion circuit 5 is shown, the second transmission processing circuit 7 is at least coupled between the second transmission port TX2 and the third end 6a of the second NFC antenna 6, which may refer to the second transmission processing circuit 7 being connected / coupled to the second transmission port TX2 of the NFC chip 2 through the corresponding output conversion circuit 5, and the other end of the second transmission processing circuit 7 is coupled to the third end 6a of the second NFC antenna 6, and is at least coupled between the second transmission port TX2 and the third end 6a of the second NFC antenna 6.

[0093] See also Fig.10 , is another more specific circuit structure diagram of the NFC antenna assembly 100 in some embodiments of the present application.

[0094] in, Fig.10 The specific circuit structures of the first transmitting processing circuit 3, the first receiving processing circuit 4, the second transmitting processing circuit 7 and the second receiving processing circuit 8 are mainly illustrated, and Fig.10 Mainly in Figure 7 The specific circuit structures of the first transmitting processing circuit 3 and the first receiving processing circuit 4 are schematically shown on the basis of the structure shown in the figure. Obviously, when the NFC antenna assembly 100 in any of the foregoing embodiments includes the first transmitting processing circuit 3, the first receiving processing circuit 4, the second transmitting processing circuit 7 and the second receiving processing circuit 8, the first transmitting processing circuit 3, the first receiving processing circuit 4, the second transmitting processing circuit 7 and the second receiving processing circuit 8 can all be Fig.10 The circuit structure shown.

[0095] In some embodiments, the first transmit processing circuit 3 and the first receive processing circuit 4 share part of the circuit structure, and the second transmit processing circuit 7 and the second receive processing circuit 8 also share part of the circuit structure.

[0096] That is, in some embodiments, part of the circuit structure is shared by the first transmitting processing circuit 3 and the first receiving processing circuit 4, and part of the circuit structure is shared by the second transmitting processing circuit 7 and the second receiving processing circuit 8, thereby effectively improving the flexibility of circuit setting, saving circuit structure, and helping to save costs.

[0097] In some embodiments, Fig.10 As shown, the first transmitting processing circuit 3 includes a first capacitor C1 and a second capacitor C2, and the first receiving processing circuit 4 includes the first capacitor C1 and a third capacitor C3. One end of the first capacitor C1 is coupled to the first end 1a of the first NFC antenna 1, and the other end is grounded. The second capacitor C2 is coupled between the first transmitting port TX1 and the remote end of the first capacitor C1, that is, it is coupled between the first transmitting port TX1 and the end of the first capacitor C1 coupled to the first end 1a of the first NFC antenna 1. The third capacitor C3 is coupled between the first receiving port RX1 and the remote end of the first capacitor C1. The first capacitor C1 and the second capacitor C2 cooperate to at least achieve matching tuning of the NFC communication frequency band. The first capacitor C1 and the third capacitor C3 cooperate to at least achieve filtering of electromagnetic wave signals of the NFC communication frequency band received by the first NFC antenna 1. As shown Fig.10 As shown, the second transmitting processing circuit 7 includes a fourth capacitor C4 and a fifth capacitor C5, and the second receiving processing circuit 8 includes the fourth capacitor C4 and a sixth capacitor C6. One end of the fourth capacitor C4 is coupled to the third end 6a of the second NFC antenna 6, and the other end is grounded. The fifth capacitor C5 is coupled between the second transmitting port TX2 and the remote end of the fourth capacitor C4, that is, it is coupled between the second transmitting port TX2 and the end of the fourth capacitor C4 coupled to the third end 6a of the second NFC antenna 6. The sixth capacitor C6 is coupled between the second receiving port RX2 and the remote end of the fourth capacitor C4. The fourth capacitor C4 and the fifth capacitor C5 cooperate to at least achieve matching tuning of the NFC communication frequency band. The fourth capacitor C4 and the sixth capacitor C6 cooperate to at least achieve filtering of electromagnetic wave signals of the NFC communication frequency band received by the second NFC antenna 6.

[0098] Thus, in some embodiments, the first transmitting processing circuit 3 includes a first capacitor C1 and a second capacitor C2, the first receiving processing circuit 4 includes the first capacitor C1 and a third capacitor C3, the first transmitting processing circuit 3 and the first receiving processing circuit 4 share the first capacitor C1, the first capacitor C1 and the second capacitor C2 can at least achieve matching tuning of the NFC communication frequency band, and the first capacitor C1 and the third capacitor C3 can at least achieve filtering of electromagnetic wave signals of the NFC communication frequency band received by the first NFC antenna 1. Similarly, the second transmitting processing circuit 7 includes a fourth capacitor C4 and a fifth capacitor C5, the second receiving processing circuit 8 includes the fourth capacitor C4 and the sixth capacitor C6, the second transmitting processing circuit 7 and the second receiving processing circuit 8 share the fourth capacitor C4, the fourth capacitor C4 and the fifth capacitor C5 can at least achieve matching tuning of the NFC communication frequency band, and the fourth capacitor C4 and the sixth capacitor C6 can at least achieve filtering of electromagnetic wave signals of the NFC communication frequency band received by the second NFC antenna 6.

[0099] Among them, in some embodiments, the capacitance values ​​of the first capacitor C1, the second capacitor C2 and the third capacitor can be set as needed, so that the first capacitor C1 and the second capacitor C2 can at least achieve matching tuning of the NFC communication frequency band, and the first capacitor C1 and the third capacitor C3 can at least achieve filtering of electromagnetic wave signals of the NFC communication frequency band received by the first NFC antenna 1. Similarly, the capacitance values ​​of the fourth capacitor C4, the fifth capacitor C5 and the sixth capacitor C6 can be set as needed, so that the fourth capacitor C4 and the fifth capacitor C5 can at least achieve matching tuning of the NFC communication frequency band, and the fourth capacitor C4 and the sixth capacitor C6 can at least achieve filtering of electromagnetic wave signals of the NFC communication frequency band received by the second NFC antenna 6.

[0100] In some embodiments, as described above, the first capacitor C1 is used to achieve frequency tuning of the NFC communication frequency band, and the second capacitor C2 is used to achieve impedance matching of the NFC communication frequency band, thereby achieving matching tuning of the NFC communication frequency band. Thus, the value of the first capacitor C1 can be set according to the need to achieve frequency tuning of the NFC communication frequency band, and the value of the second capacitor C2 can be set according to the need to achieve impedance matching of the NFC communication frequency band. Correspondingly, the fourth capacitor C4 is used to achieve frequency tuning of the NFC communication frequency band, and the fifth capacitor C5 is used to achieve impedance matching of the NFC communication frequency band, thereby achieving matching tuning of the NFC communication frequency band. Thus, the value of the fourth capacitor C4 can be set according to the need to achieve frequency tuning of the NFC communication frequency band, and the value of the fifth capacitor C5 can be set according to the need to achieve impedance matching of the NFC communication frequency band.

[0101] Among them, for more specific contents about the setting of the capacitance values ​​of the first capacitor C1, the second capacitor C2 and the third capacitor and the capacitance values ​​of the fourth capacitor C4, the fifth capacitor C5 and the sixth capacitor C6, please refer to the relevant introduction about the setting of the capacitance values ​​of the first capacitor C1, the second capacitor C2 and the third capacitor in the previous text, which will not be repeated here.

[0102] The first capacitor C1 and the fourth capacitor C4 together are also conducive to forming a differential feeding effect, which is conducive to suppressing common-mode interference signals and improving the transmission performance of the NFC communication frequency band.

[0103] In this application, Fig.10 The circuit structure of the first transmission processing circuit 3, the first reception processing circuit 4, the second transmission processing circuit 7 and the second reception processing circuit 8 shown can effectively at least realize the matching tuning of the NFC communication frequency band, and at least realize the filtering of the electromagnetic wave signal of the NFC communication frequency band received by the first NFC antenna 1 and the second NFC antenna 6.

[0104] See also Fig.11 , which is another more specific circuit structure diagram of the NFC antenna assembly 100 in some embodiments of the present application.

[0105] in, Fig.11 Can be in Fig.10 Based on the structure of the NFC antenna assembly 100 shown, further structures are illustrated.

[0106] like Fig.11As shown, in some embodiments, the NFC antenna assembly 100 further includes a jumper capacitor Ck1 , and the jumper capacitor Ck1 is connected between a remote end of the first capacitor C1 and a remote end of the fourth capacitor C4 .

[0107] That is, in some embodiments, Fig.10 On the basis of the circuit structure of the NFC antenna assembly 100 shown, a jumper capacitor Ck1 may be further added and connected between the remote end of the first capacitor C1 and the remote end of the fourth capacitor C4.

[0108] Since the NFC antenna is equivalent to an inductor, the electromotive force / voltage at the connection between the first transmitting processing circuit 3 and the first NFC antenna 1, that is, the electromotive force / voltage at the remote end of the first capacitor C1, depends on the equivalent inductance / inductance value of the first NFC antenna 1, and the electromotive force / voltage at the connection between the second transmitting processing circuit 7 and the second NFC antenna 6, that is, the electromotive force / voltage at the remote end of the fourth capacitor C4, depends on the equivalent inductance / inductance value of the second NFC antenna 6. Generally speaking, since the first NFC antenna 1 and the second NFC antenna 6 are arranged at different positions of the applied electronic device, and the spaces provided at different positions are different, the lengths of the first NFC antenna 1 and the second NFC antenna 6 are often different, which often leads to different equivalent inductance values ​​of the first NFC antenna 1 and the second NFC antenna 6, and causes a potential difference V between the remote end of the first capacitor C1 and the remote end of the fourth capacitor C4. According to the capacitor energy storage formula:

[0109]

[0110] Under an extremely weak field, the induced electromotive force corresponding to a weaker NFC antenna, that is, an NFC antenna with a smaller equivalent inductance value, is lower than the working threshold and cannot trigger the NFC chip 2 to work. At this time, the jumper capacitor Ck1 can be discharged between the remote end of the first capacitor C1 and the remote end of the fourth capacitor C4 as compensation, and the electromagnetic wave signal of the NFC communication frequency band received by the weaker NFC antenna can be strengthened. After being input into the corresponding receiving port, the NFC chip 2 can be triggered to work, and the received electromagnetic wave signal of the NFC communication frequency band can be processed.

[0111] Therefore, in some embodiments, Fig.11 The NFC antenna assembly 100 shown in FIG. Fig.10Adding a crossover capacitor Ck1 to the circuit structure of the NFC antenna assembly 100 shown in the figure can effectively improve the receiving performance of the NFC communication frequency band. As mentioned above, the first capacitor C1 and the fourth capacitor C4 together are also conducive to forming a differential feeding effect, which is conducive to suppressing common-mode interference signals and improving the transmission performance of the NFC communication frequency band. Therefore, Fig.11 The NFC antenna assembly 100 shown can improve both the transmission performance and the reception performance of the NFC communication frequency band.

[0112] See also Fig.12 , is another more specific circuit structure diagram of the NFC antenna assembly 100 in some embodiments of the present application.

[0113] In some embodiments, Fig.12 As shown, the NFC antenna assembly 100 further includes a jumper capacitor Ck1, the jumper capacitor Ck1 includes a first jumper terminal KP1 and a second jumper terminal KP2, the first jumper terminal KP1 and the second jumper terminal KP2 are respectively coupled to the first terminal 1a of the first NFC antenna 1 and the third terminal 6a of the second NFC antenna 6. Fig.12 As shown, the first transmitting processing circuit 3 includes a second capacitor C2, and the first receiving processing circuit 4 includes a third capacitor C3. The second capacitor C2 is coupled between the first transmitting port TX1 and the first jumper terminal KP1 of the jumper capacitor Ck1, and the third capacitor C3 is coupled between the first receiving port RX1 and the first jumper terminal KP1 of the jumper capacitor Ck1. The matching tuning of the NFC communication frequency band is achieved at least through the second capacitor C2, and the filtering of the electromagnetic wave signal of the NFC communication frequency band received by the first NFC antenna 1 is achieved at least through the third capacitor C3. In some embodiments, as Fig.12 As shown, the second transmitting processing circuit 7 includes a fifth capacitor C5, and the second receiving processing circuit 8 includes a sixth capacitor C6. The fifth capacitor C5 is coupled between the second transmitting port TX2 and the second jumper end KP2 of the jumper capacitor Ck1, and the sixth capacitor C6 is coupled between the second receiving port RX2 and the second jumper end KP2 of the jumper capacitor Ck1. The matching tuning of the NFC communication frequency band is achieved at least through the fifth capacitor C5, and the filtering of the electromagnetic wave signal of the NFC communication frequency band received by the second NFC antenna 6 is achieved at least through the sixth capacitor C6.

[0114] That is, in some embodiments, Fig.12 As shown, compared Fig.10 The structure shown can be omitted Fig.10The first capacitor C1 and the fourth capacitor C4 and the ground connection structure of the first capacitor C1 and the fourth capacitor C4 are added, and the cross-connection capacitor Ck1 is added, wherein, compared with Fig.11 The structure shown can be removed Fig.11 The first capacitor C1 and the fourth capacitor C4 and their ground connection structure are shown in FIG.

[0115] As mentioned above, by connecting the capacitor Ck1 across the NFC communication frequency band, the receiving performance can be effectively improved.

[0116] In some embodiments, Fig.12 In the structure shown, when the matching tuning of the NFC communication frequency band is achieved through the second capacitor C2, and the filtering of the electromagnetic wave signal of the NFC communication frequency band received by the first NFC antenna 1 is achieved through the third capacitor C3, the jumper capacitor Ck1 can also play a certain role, that is, the matching tuning of the NFC communication frequency band achieved at least through the second capacitor C2 can be achieved by the cooperation of the second capacitor C2 and the jumper capacitor Ck1 to achieve the matching tuning of the NFC communication frequency band, and the filtering of the electromagnetic wave signal of the NFC communication frequency band received by the first NFC antenna 1 at least through the third capacitor C3 can also be achieved by the cooperation of the third capacitor C3 and the jumper capacitor Ck1 to at least achieve the filtering of the electromagnetic wave signal of the NFC communication frequency band received by the first NFC antenna 1. In some embodiments, Fig.12 Under the structure shown, when the matching tuning of the NFC communication frequency band is implemented through the fifth capacitor C5, and the filtering of the electromagnetic wave signal of the NFC communication frequency band received by the second NFC antenna 6 is implemented through the sixth capacitor C6, the jumper capacitor Ck1 can also play a certain role, that is, the matching tuning of the NFC communication frequency band implemented at least through the fifth capacitor C5 can be implemented by the cooperation of the fifth capacitor C5 and the jumper capacitor Ck1 to achieve the matching tuning of the NFC communication frequency band, and the filtering of the electromagnetic wave signal of the NFC communication frequency band received by the second NFC antenna 6 at least through the sixth capacitor C6 can be implemented by the cooperation of the sixth capacitor C6 and the jumper capacitor Ck1 to achieve at least the filtering of the electromagnetic wave signal of the NFC communication frequency band received by the second NFC antenna 6.

[0117] The jumper capacitor Ck1 mainly improves the receiving performance of the NFC communication frequency band, and the jumper capacitor Ck1 can be regarded as a structure shared by the first receiving processing circuit 4 and the second receiving processing circuit 8. That is, in some embodiments, the jumper capacitor Ck1 can be regarded as a structure included in the first receiving processing circuit 4 and a structure included in the second receiving processing circuit 8 at the same time.

[0118] In some embodiments, the first transmitting processing circuit 3, the first receiving processing circuit 4, the second transmitting processing circuit 7, and the second receiving processing circuit 8 in the NFC antenna assembly 100 in any of the foregoing embodiments may also be Figure 10-12 The structure shown in any of the accompanying drawings.

[0119] See also Fig.13 , which is a more specific schematic diagram of other circuit structures of the NFC antenna assembly 100 in some embodiments of the present application.

[0120] in, Fig.13 It can also be Figure 7 and Fig.12 The NFC antenna assembly 100 shown is a schematic diagram illustrating a further structure.

[0121] like Fig.13 As shown, the NFC chip 2 includes a first transmitting port TX1, a first receiving port RX1, a second transmitting port TX2 and a second receiving port RX2, and the NFC antenna assembly 100 includes the aforementioned first NFC antenna 1, NFC chip 2, a first transmitting processing circuit 3, a first receiving processing circuit 4, a second NFC antenna 6, a second transmitting processing circuit 7 and a second receiving processing circuit 8. Fig.13 As shown, the NFC antenna assembly 100 also includes a second balun circuit 9, which includes a second input coil 91 and a second output coil 92, wherein both ends of the second input coil 91 are respectively connected to the first transmitting port TX1 and the second transmitting port TX2, one end of the second output coil is connected to the first transmitting processing circuit 3, that is, the second capacitor C2, and the other end is connected to the second transmitting processing circuit 7, that is, the fifth capacitor C5.

[0122] Among them, since the balun structure has the property of equal current at both ends of the output coil, even when the equivalent inductance values ​​of the first NFC antenna 1 and the second NFC antenna 6 are not equal, by adding the second balun circuit 9, the current can be made equal, that is, the power / amplitude of the two feeding signals respectively fed into the first NFC antenna 1 and the second NFC antenna 6 are equal, and an equivalent differential effect is achieved, that is, the effect of differential feeding is achieved, which is beneficial to suppress common-mode interference signals and improve the transmission performance of the NFC communication frequency band.

[0123] Wherein, in some embodiments, Fig.13As shown, when the second balun circuit 9 is included, since the second balun circuit 9 also realizes the effect of differential feeding, which is similar to the effect of the first capacitor C1 and the fourth capacitor C4, and the effect is better, the NFC antenna component 100 may not include the first capacitor C1 and the fourth capacitor C4, but may only include the second capacitor C2, the third capacitor C3, the fifth capacitor C5, the sixth capacitor C6 and the jumper capacitor Ck1 and other structures.

[0124] As mentioned above, the cross-over capacitor Ck1 can effectively improve the receiving performance of the NFC communication frequency band. Since the second balun circuit 9 is also conducive to forming a differential feeding effect, it is beneficial to suppress common-mode interference signals and improve the transmission performance of the NFC communication frequency band. Therefore, Fig.13 The NFC antenna assembly 100 shown can also improve both the transmission performance and the reception performance of the NFC communication frequency band.

[0125] In some embodiments, two ends of the second input coil 91 of the second balun circuit 9 receive the corresponding first NFC feed signal and second NFC feed signal from the first transmitting port TX1 and the second transmitting port TX2, respectively, and two ends of the second output coil 92 of the second balun circuit 9 output two feed signals for respectively exciting the first NFC antenna 1 and the second NFC antenna 6, and the frequencies of the two feed signals are the same as the frequencies of the first NFC feed signal and the second NFC feed signal, and the amplitudes are also the same as the amplitudes of the first NFC feed signal and the second transmitting port TX2. Among them, although the second balun circuit 9 does not improve the transmission power, it has better suppression of common-mode interference signals.

[0126] The turns ratio of the second input coil 91 and the second output coil 92 of the second balun circuit 9 is also approximately 1:1.

[0127] That is, the second balun circuit 9 may also be substantially similar to a transformer with a turns ratio of 1:1.

[0128] See also Fig.14 , which is another further structural block diagram of the NFC antenna assembly 100 in some embodiments of the present application.

[0129] in, Fig.14 Specifically, Figure 1 The NFC antenna assembly 100 shown has been added with further structures for illustration purposes only.

[0130] In some embodiments, the first NFC antenna 1 is reused as an antenna branch of other frequency bands, and the NFC antenna assembly 100 further includes a first isolation unit 101, which is located between the first transmission processing circuit 3, the first reception processing circuit 4 and the first end 1a of the first NFC antenna 1, and is used to achieve isolation between the electromagnetic wave signals of the NFC communication frequency band and the electromagnetic wave signals of other frequency bands.

[0131] That is, in some embodiments, since one end of the first NFC antenna 1 is fed and the other end is grounded, the structural requirements of antennas such as cellular communication antennas, WiFi, Bluetooth antennas, and satellite communication antennas are met. Therefore, it can also be excited by feed sources of other frequency bands such as cellular communication, WiFi, Bluetooth, and satellite communication to support the transmission and reception of electromagnetic wave signals of other frequency bands, thereby supporting more frequency bands without increasing the size. At this time, the NFC antenna assembly 100 also includes a first isolation unit 101, which is located between the first transmitting processing circuit 3, the first receiving processing circuit 4 and the first end 1a of the first NFC antenna 1, and is used to achieve isolation between the electromagnetic wave signals of the NFC communication frequency band and the electromagnetic wave signals of other frequency bands, thereby avoiding interference between multiple frequency bands when the first NFC antenna 1 is shared by multiple frequency bands.

[0132] Among them, Fig.14 As shown, the first NFC antenna 1 includes a feeding point F1, and the feeding point F1 is used to connect to the first feed source S1. In some embodiments, the first NFC antenna also supports the reception and transmission of electromagnetic wave signals in a first frequency band under the excitation of the first feed source S1, wherein the first frequency band is a frequency band other than the NFC communication frequency band, such as a cellular communication antenna, a WiFi frequency band, a Bluetooth frequency band, a satellite communication frequency band, and the like.

[0133] In some embodiments, Fig.14 As shown, the feeding point F1 is located at the first end 1a of the first NFC antenna 1, that is, it is co-terminal with the feeding end of the NFC communication frequency band of the first end 1a of the first NFC antenna 1. In some embodiments, the feeding point F1 may also be located at other positions of the first NFC antenna 1 except the second end 1b, that is, it may not be co-terminal with the feeding end of the NFC communication frequency band of the first end 1a of the first NFC antenna 1.

[0134] In some embodiments, the first isolation unit 101 may include a filter, and the first isolation unit 101 is used to allow the electromagnetic wave signal of the NFC communication frequency band to pass through, while preventing the electromagnetic wave signal of other frequency bands from passing through. Among them, the first isolation unit 101 may include a bandpass filter, a bandstop filter, a low-pass filter, a high-pass filter, etc. For example, the first isolation unit 101 may include a bandpass filter, and the bandpass filter only allows the electromagnetic wave signal of the NFC communication frequency band to pass through, while preventing the electromagnetic wave signal of other frequency bands from passing through. For another example, the first isolation unit 101 may include a bandstop filter, and the blocked frequency range is the frequency range corresponding to other frequency bands sharing the first NFC antenna 1, so that the electromagnetic wave signal of the NFC communication frequency band is allowed to pass through, while preventing the electromagnetic wave signal of other frequency bands from passing through. For another example, according to whether the frequency of other frequency bands sharing the first NFC antenna 1 is higher or lower than that of the NFC communication frequency band, the first isolation unit 101 may use a low-pass filter or a high-pass filter to allow the electromagnetic wave signal of the NFC communication frequency band to pass through, while preventing the electromagnetic wave signal of other frequency bands from passing through.

[0135] In some embodiments, the other frequency band, i.e., the first frequency band, may be a medium or high frequency band. Obviously, as mentioned above, the other frequency band, i.e., the first frequency band, may also be a low frequency band for cellular communication, as well as a WiFi band, a Bluetooth band, a satellite communication band, and the like.

[0136] in, Fig.14 Only for further illustrating the first isolation unit 101 , other structures of the NFC antenna assembly 100 may refer to the description of the above embodiments.

[0137] See also Fig.15 , which is yet another structural block diagram of the NFC antenna assembly 100 in some embodiments of the present application.

[0138] in, Fig.15 Specifically, Figure 7 The NFC antenna assembly 100 shown has been added with further structures for illustration purposes only.

[0139] In some embodiments, the second NFC antenna 6 is reused as an antenna branch of other frequency bands, and the NFC antenna assembly 100 further includes a second isolation unit 102, which is located between the second transmitting processing circuit 7, the second receiving processing circuit 8 and the third end 6a of the second NFC antenna 6, and is used to achieve isolation between the electromagnetic wave signals of the NFC communication frequency band and the electromagnetic wave signals of other frequency bands.

[0140] That is, in some embodiments, since one end of the second NFC antenna 6 is fed and the other end is grounded, the structural requirements of antennas such as cellular communication antennas, WiFi, Bluetooth antennas, and satellite communication antennas are also met. Therefore, it can also be excited by feed sources of other frequency bands such as cellular communication, WiFi, Bluetooth, and satellite communication to support the transmission and reception of electromagnetic wave signals of other frequency bands, thereby supporting more frequency bands without increasing the size. At this time, the NFC antenna assembly 100 also includes a second isolation unit 102, between the second transmitting processing circuit 7, the second receiving processing circuit 8 and the third end 6a of the second NFC antenna 6, for isolating the electromagnetic wave signals of the NFC communication frequency band from the electromagnetic wave signals of other frequency bands, thereby avoiding interference between multiple frequency bands when the second NFC antenna 6 is shared by multiple frequency bands.

[0141] Likewise, the second isolation unit 102 may also include a filter to allow electromagnetic wave signals in the NFC communication frequency band to pass through and block electromagnetic wave signals in other frequency bands from passing through.

[0142] Among them, Fig.15 As shown, the second NFC antenna 6 includes a feeding point F2, and the feeding point F2 is used to connect to the second feed source S2. In some embodiments, the second NFC antenna 6 also supports the reception and transmission of electromagnetic wave signals in a second frequency band under the excitation of the second feed source S2, wherein the second frequency band is a frequency band other than the NFC communication frequency band, such as a cellular communication antenna, a WiFi frequency band, a Bluetooth frequency band, a satellite communication frequency band, and the like.

[0143] In some embodiments, Fig.15 As shown, the feeding point F2 is located at the third end 6a of the second NFC antenna 6, that is, it is co-terminal with the feeding end of the NFC communication frequency band of the third end 6a of the second NFC antenna 6. In some embodiments, the feeding point F2 may also be located at any other position of the third end 6a of the second NFC antenna 6 except the fourth end 6b, that is, it may not be co-terminal with the feeding end of the NFC communication frequency band of the third end 6a of the second NFC antenna 6.

[0144] In some embodiments, Fig.15 As shown, the first NFC antenna 1 can also be reused as an antenna branch of other frequency bands. The NFC antenna assembly 100 also includes a first isolation unit 101, which is located between the first transmitting processing circuit 3, the first receiving processing circuit 4 and the first end 1a of the first NFC antenna 1, and is used to achieve isolation between the electromagnetic wave signals of the NFC communication frequency band and the electromagnetic wave signals of other frequency bands.

[0145] That is, in some embodiments, Fig.15 As shown, the first NFC antenna 1 and the second NFC antenna 6 can both be reused as antenna branches of other frequency bands. For example, the first NFC antenna 1 can be reused as an antenna branch of a first frequency band, and the second NFC antenna 6 can be reused as an antenna branch of a second frequency band. The first frequency band and the second frequency band can be the same or different.

[0146] In some embodiments, only one of the first NFC antenna 1 and the second NFC antenna 6 may be reused as an antenna branch of other frequency bands.

[0147] Among them, Figure 10-13 As shown in the figures, in some embodiments, the first transmitting port TX1, the first receiving port RX1, the second transmitting port TX2, and the second receiving port RX2 of the NFC chip 2 can be set on the same side of the NFC chip 2, and the first receiving port RX1, the first transmitting port TX1, the second transmitting port TX2, and the second receiving port RX2 are set in sequence, and the circuit structure of the first transmitting processing circuit 3 and the first receiving processing circuit 4 can be roughly symmetrical with the circuit structure of the second transmitting processing circuit 7 and the second receiving processing circuit 8.

[0148] Thus, the NFC antenna assembly 100 of the present application receives power feed by connecting only the first end 1a of the first NFC antenna 1 to the NFC chip 2, and grounding the second end 1b of the first NFC antenna 1. Since the grounding can be directly connected to a structure such as a middle frame or a metal back shell, it is not necessary to connect to the mainboard, so the setting position of the first NFC antenna 1 can be more flexible. Alternatively, only the third end 6a of the second NFC antenna 6 is connected to the NFC chip 2 to receive power feed, and the fourth end 6b of the second NFC antenna 6 is grounded. Since the grounding can be directly connected to a structure such as a middle frame or a metal back shell, it is not necessary to connect to the mainboard, so the setting position of the second NFC antenna 6 can be more flexible, and the setting requirements of the NFC antenna can be met in an environment where the clearance area is getting smaller and smaller. In addition, there is no need to set up a small board and connect the mainboard power feed through a coaxial line, which can reduce costs and reduce power feed transmission losses. In addition, in the present application, through the NFC antenna assembly 100 in some of the aforementioned embodiments, for example, through the output conversion circuit 5, the receiving and transmitting performance of the NFC communication frequency band can be improved through a simple structure; and in some embodiments, the first NFC antenna 1 and / or the second NFC antenna 6 can also be shared by other frequency bands to support the reception and transmission of electromagnetic wave signals in other frequency bands, and can support multiple frequency bands without increasing the size, and can effectively avoid interference by setting an isolation unit.

[0149] See also Fig.16, is a structural block diagram of an electronic device 200 in some embodiments of the present application. Fig.16 As shown, the electronic device 200 may include the NFC antenna assembly 100 described in any of the aforementioned embodiments.

[0150] Thus, the electronic device 200 is equipped with the NFC antenna assembly 100 in any of the aforementioned embodiments. Since only the first end 1a of the first NFC antenna 1 is connected to the NFC chip 2 to receive power feeding, and the second end 1b of the first NFC antenna 1 is grounded, since the grounding can be directly connected to a structure such as a middle frame or a metal back shell without being connected to a mainboard, the setting position of the first NFC antenna 1 can be made more flexible. Alternatively, when the second NFC antenna 6 is included, only the third end 6a of the second NFC antenna 6 is connected to the NFC chip 2 to receive power feeding, and the fourth end 6b of the second NFC antenna 6 is grounded. Since the grounding can be directly connected to a structure such as a middle frame or a metal back shell without being connected to a mainboard, the setting position of the second NFC antenna 6 can be made more flexible, and the setting requirements of the NFC antenna can be met in an environment where the clearance area is getting smaller and smaller.

[0151] In addition, as mentioned above, in some embodiments, through the NFC antenna assembly 100 in some of the aforementioned embodiments, by setting the output conversion circuit 5, etc., the reception and transmission performance of the NFC communication frequency band can be improved through a simple structure, and in some embodiments, the first NFC antenna 1 and / or the second NFC antenna 6 can also be shared by other frequency bands to support the reception and transmission of electromagnetic wave signals in other frequency bands, and can support multiple frequency bands without increasing the size, and can effectively avoid interference by setting an isolation unit.

[0152] See also Fig.17 , is a schematic plan view of an electronic device 200 in some embodiments of the present application. Fig.17 The schematic top view of the structure of the NFC antenna assembly 100 is shown from the front side of the electronic device 200, that is, from the viewing direction of one side of the display screen.

[0153] in, Fig.17 To include Figure 7 The NFC antenna assembly 100 shown is used as an example for illustration. Obviously, the electronic device 200 may include the NFC antenna assembly 100 in any of the aforementioned embodiments.

[0154] Among them, Fig.17 As shown, the electronic device 200 further includes a frame B1, and the first NFC antenna 1 and other NFC antennas can be arranged on the frame B1 of the electronic device 200. Fig.17As shown, when the NFC antenna assembly 100 further includes the second NFC antenna 6 , the second NFC antenna 6 is also disposed on the border B1 of the electronic device 200 .

[0155] Among them, Fig.17 As shown, the first NFC antenna 1 and the second NFC antenna 6 and other NFC antennas are arranged on the frame B1 of the electronic device 200 and are spaced apart by a gap X1.

[0156] In some embodiments, the frame B1 of the electronic device 200 is a metal frame, and the first NFC antenna 1 and the second NFC antenna 6 and other NFC antennas are metal frame segments formed by opening the gap X1 in the metal frame of the electronic device 200 .

[0157] In some other embodiments, the frame B1 of the electronic device 200 is a non-metal frame, and the first NFC antenna 1, the second NFC antenna 6 and other NFC antennas are metal segments arranged in the frame of the electronic device 200, and the first NFC antenna 1, the second NFC antenna 6 and other NFC antennas are arranged at intervals.

[0158] That is, in some other embodiments, the frame B1 of the electronic device 200 may also be a non-metal frame with low conductivity such as plastic, ceramic, etc. The first NFC antenna 1 and the second NFC antenna 6 are metal segments arranged in the frame B1 of the electronic device 200, that is, they are arranged in the frame B1 in the form of metal inserts.

[0159] The first NFC antenna 1 and the second NFC antenna 6 and other NFC antennas may be embedded in the frame of the electronic device 200 , or may be disposed on the inner side of the frame of the electronic device 200 .

[0160] In some embodiments, the first NFC antenna 1 and the second NFC antenna 6 and other NFC antennas are in a long strip shape, and the surface with the largest area of ​​the first NFC antenna 1 and the second NFC antenna 6 and other NFC antennas is a surface parallel to the frame surface of the frame B1, wherein the frame surface of the frame B1 is approximately perpendicular to the plane of the display screen of the electronic device 200.

[0161] In some embodiments, the electronic device 200 may further include an antenna bracket, which is made of insulating material. The first NFC antenna 1 and the second NFC antenna 6 may also be fixed on the corresponding antenna bracket and fixed to the corresponding position of the electronic device near the frame B1 through the antenna bracket.

[0162] In some embodiments, the NFC antennas such as the first NFC antenna 1 and the second NFC antenna 6 may also be FPC (flexible printed circuit) antennas fixedly arranged on the antenna bracket or LDS (Laser-Direct-structuring) metal segments formed on the antenna bracket by laser technology, or PDS (Printing Direct Structure) metal segments formed on the antenna bracket by PDS technology (for example, by printing conductive ink, conductive silver paste, etc. on the antenna bracket to form the metal segments), and are fixed to the corresponding positions in the electronic device 200 through the antenna bracket, for example, the corresponding positions close to the frame B1.

[0163] Among them, Fig.17 As shown, the electronic device 200 further includes a mainboard 201, wherein the NFC chip 2, the first transmission processing circuit 3, the first reception processing circuit 4 and other processing circuits may be specifically arranged on the mainboard 201. Fig.17 For the convenience of illustration, the NFC chip 2 , the first transmission processing circuit 3 , the first reception processing circuit 4 and other processing circuits are illustrated outside the mainboard 201 .

[0164] Among them, Fig.17 As shown, the electronic device 200 further includes a middle frame 202, and the middle frame 202 is used to support structures such as a display screen, and the middle frame 202 is used as a whole device ground to provide a ground potential.

[0165] The grounding of the second end 1b of the first NFC antenna 1 can be achieved by connecting to the middle frame 202. In some embodiments, when the electronic device 200 further includes the second NFC antenna 6, the grounding of the fourth end 6b of the second NFC antenna 6 can also be achieved by connecting to the middle frame 202.

[0166] In some embodiments, when the NFC antenna assembly 100 further includes the second NFC antenna 6, at least one of the second end 1b of the first NFC antenna 1 and the fourth end 6b of the second NFC antenna 6 is grounded by being connected to the middle frame 202. For example, in some embodiments, the second end 1b of the first NFC antenna 1 is connected to the middle frame 202 to be grounded, and the fourth end 6b of the second NFC antenna 6 may be close to the mainboard 201 and may be electrically connected to the ground on the mainboard 201 to be grounded.

[0167] The ground on the mainboard 201 may be connected to the middle frame 202 to provide a ground potential.

[0168] in, Fig.17 In the figure, the second end 1b of the first NFC antenna 1 is grounded, which can be connected to the middle frame 202 to achieve grounding.

[0169] In some embodiments, Fig.17 As shown, the first end 1a of the first NFC antenna 1 is closer to the mainboard 201 than the second end 1b. Therefore, in some embodiments, since the second end 1b of the first NFC antenna 1 is relatively far away from the mainboard 201, the second end 1b of the first NFC antenna 1 is grounded and can be grounded by connecting to the middle frame 202.

[0170] In some embodiments, Fig.17 As shown, the third end 6 a and the fourth end 6 b of the second NFC antenna 6 can be close to the mainboard 201 , so the fourth end 6 b of the second NFC antenna 6 can be grounded by being connected to the ground on the mainboard 201 .

[0171] Among them, Fig.17 As shown, the electronic device 200 includes a top end D1, a bottom end D2, and two side ends D3. In some embodiments, the mainboard 201 is spaced apart from the top end D1 or the bottom end D2, and the second end 1b of the first NFC antenna 1 is located at the top end D1 or the bottom end D2 or is disposed close to the top end D1 or the bottom end D2. That is, in some embodiments, the second end 1b of the first NFC antenna 1 is located at the top end D1 or the bottom end D2, or is located close to the top end D1 or the bottom end D2, and therefore, is also spaced apart from the mainboard 201, and can be grounded by connecting to the middle frame 202.

[0172] In some embodiments, Fig.17 As shown, the main board 201 is disposed close to one of the target side ends D3 and is spaced apart from the top end D1 or the bottom end D2. The distance between the main board 201 and the target side end D3 is smaller than the distance to the top end D1 or the bottom end D2.

[0173] In some embodiments, Fig.17 As shown, the portion of the first NFC antenna 1 including the second end 1b is located at the top end D1 or the bottom end D2, and the other portion of the first NFC antenna 1 including the first end 1a is located at the target side end D3.

[0174] That is, in some embodiments, part of the first NFC antenna 1 is located at the top end D1 or the bottom end D2, and the other part is located at the side end D3. The first NFC antenna 1 is an overall "L"-shaped bending structure, and is arranged at the top corner position / corner position of the electronic device 200, so that the space of the electronic device 200 can be used as much as possible to set the NFC antenna, without occupying the space of other antennas. In addition, since the distance between the top end D1 or the bottom end D2 and the main board 201 is relatively far, therefore, when the part of the first NFC antenna 1 including the second end 1b is located at the top end D1 or the bottom end D2, and since the other part of the first NFC antenna 1 including the first end 1a is located at the target side end D3, it can be more convenient to be electrically connected to the first transmitting processing circuit 3 and the first receiving processing circuit 4 etc. arranged on the main board 201 through a feeding connector such as a feeding spring.

[0175] In some embodiments, the electronic device 200 further includes a USB interface 204, and the USB interface 204 is disposed at the bottom end D2, and the mainboard 201 is at least spaced apart from the bottom end D2. In some embodiments, the first NFC antenna 1 is located at the bottom end D2, and the second end 1b of the first NFC antenna 1 is closer to the USB interface 204 than the first end 1a. That is, in some embodiments, the first NFC antenna 1 may also be disposed as a whole at the bottom end D2, and the second end 1b of the first NFC antenna 1 is closer to the USB interface 204 than the first end 1a. Since it is not convenient to set a feeding connection structure at a position close to the USB interface 204, in the present application, even when the second end 1b of the first NFC antenna 1 is closer to the USB interface 204 than the first end 1a, since the second end 1b of the first NFC antenna 1 is grounded, it can be connected to the middle frame 202 and the like and conveniently grounded.

[0176] In some embodiments, the first NFC antenna 1 may also be disposed as a whole at the target side end D3, and the second end 1b of the first NFC antenna 1 is disposed close to the top end D1 or the bottom end D2, for example, the distance between the second end 1b and the top end D1 or the bottom end D2 is less than a preset distance, for example, less than 1 cm.

[0177] In some embodiments, Fig.17As shown, the second NFC antenna 6 is disposed at one of the side ends D3, for example, at the target side end D3, so the third end 6a and the fourth end 6b of the second NFC antenna 6 are both close to the main board 201, and the third end 6a of the second NFC antenna 6 can be electrically connected to the second transmitting processing circuit 7 and the second receiving processing circuit 8 disposed on the main board 201 through a feeding connector such as a feeding spring, and the fourth end 6b of the second NFC antenna 6 can be grounded by connecting to the ground on the main board 201. Fig.17 As shown, in some embodiments, the second NFC antenna 6 can be arranged adjacent to and spaced from the first NFC antenna 1, so that the two NFC antennas 6 are close to each other, which is beneficial to improving the NFC communication performance. Fig.17 As shown, the third end 6a of the second NFC antenna 6 is adjacent to and spaced from the first end 1a of the first NFC antenna 1 .

[0178] Wherein, in some embodiments, Fig.17 As shown, the main board 201 may be a long and narrow square board, and the length of the main board 201 is significantly greater than the width of the main board 201 .

[0179] In some embodiments, the length of the mainboard 201 is relatively close to the length of the side end D3 of the electronic device 200, for example, the length of the mainboard 201 may be greater than 1 / 2 of the length of the side end D3 of the electronic device 200. In some embodiments, the width of the mainboard 201 may also be significantly smaller than the length of the top end D1 or the bottom end D2 of the electronic device 200, for example, the width of the mainboard 201 may be less than 1 / 2 of the length of the top end D1 or the bottom end D2 of the electronic device 200.

[0180] Among them, the length of the side end D3 may be the dimension in the extension direction of the longest side of the side end D3, that is, the dimension in the extension direction of the side parallel to the plane where the display screen of the electronic device 200 is located, and the length of the top end D1 or the bottom end D2 may be the dimension in the extension direction of the longest side of the top end D1 or the bottom end D2, that is, the dimension in the extension direction of the side parallel to the plane where the display screen of the electronic device 200 is located.

[0181] In some embodiments, the main board 201 may also be disposed at other positions, for example, it may be disposed close to the top end D1 and the two side ends connected to the top end D1, and the distance from the bottom end D2 is significantly greater than the distance from the top end D1 and the two side ends D3. The main board 201 is also roughly square and is roughly disposed in the upper half of the electronic device 200 close to the top end D1, and so on.

[0182] In some embodiments, Fig.17 As shown, the target side end D3 may be Fig.17 The right side edge in the viewing angle shown, that is, when viewed from the side of the display screen with the top end D1 of the electronic device 200 at the top and the bottom end D2 at the bottom, is located at the right side edge D3.

[0183] In some embodiments, Fig.17 As shown, the portion of the first NFC antenna 1 including the second end 1b is located at the bottom end D2, and the other portion of the first NFC antenna 1 including the first end 1a is located at the target side end D3. Obviously, in some embodiments, the other portion of the first NFC antenna 1 including the first end 1a is located at the target side end D3, and the portion of the first NFC antenna 1 including the second end 1b may also be located at the top end D1.

[0184] Among them, the directional terms such as "top" and "bottom" used in the embodiments of the present application to describe the electronic device 200 are mainly explained based on the orientation when the user holds the electronic device 200 and uses it. The position toward the top side of the electronic device 200 is the "top", and the position toward the bottom side of the electronic device 200 is the "bottom". It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the orientation of the electronic device 200 in actual application scenarios. In some embodiments, the bottom end D2 of the electronic device 200 is the end where the headphone jack and the USB port are provided, and the top end D1 of the electronic device 200 is the other end opposite to the end where the headphone jack and the USB port are provided, and may also refer to the end where a camera, a receiver, etc. are provided.

[0185] in, Fig.17 For the convenience of illustration, the setting order of the first transmitting port TX1, the first receiving port RX1, the second transmitting port TX2, and the second receiving port RX2 of the NFC chip 2 is the same as that of the previous Figure 10-13 The order of setting up the etc. graph summaries is different.

[0186] Among them, Fig.17 As shown, the electronic device 200 further includes a front camera 203 and the aforementioned USB interface (USB port) 204. The front camera 203 is used for front-facing shooting and is disposed near the top D1. The USB interface 204 is disposed at the bottom D2. Fig.17 As shown, the electronic device 200 further includes a display screen 205, wherein the display screen 205 may be a touch display screen.

[0187] See also Fig.18, is another plan view of the electronic device 200 in some embodiments of the present application. Fig.18 It may also be a top view schematic diagram illustrating the structure of the NFC antenna assembly 100 from the front side of the electronic device 200, that is, from the viewing direction of one side of the display screen.

[0188] in, Fig.18 Also includes Figure 7 The NFC antenna assembly 100 shown is used as an example for illustration. That is, in some embodiments, the NFC antenna assembly 100 includes the first NFC antenna 1 and the second NFC antenna 6 .

[0189] Among them, Fig.18 As shown, in some embodiments, the mainboard 201 is spaced apart from the top end D1 or the bottom end D2, and the first NFC antenna 1 is located at the top end D1 or the bottom end D2, that is, in some embodiments, the first NFC antenna 1 may also be disposed as a whole at the top end D1 or the bottom end D2.

[0190] Fig.18 In the figure, the first NFC antenna 1 is located at the bottom end D2 as an example, and the second end 1b of the first NFC antenna 1 is closer to the USB interface 204 than the first end 1a. Since it is not convenient to set a feeding connection structure at a position close to the USB interface 204, in the present application, even when the second end 1b of the first NFC antenna 1 is closer to the USB interface 204 than the first end 1a, since the second end 1b of the first NFC antenna 1 is grounded, it can be connected to the middle frame 202 and the like and conveniently grounded.

[0191] Among them, Fig.18 As shown, the first NFC antenna 1 is also close to one of the side ends D3, for example, the first end 1a of the first NFC antenna 1 is close to the target side end D3.

[0192] like Fig.18 As shown, the second NFC antenna 6 is disposed at one of the side ends D3, and is adjacent to and spaced from the first NFC antenna 1. Fig.18 As shown, the second NFC antenna 6 is disposed at the side end D3 close to the first NFC antenna 1, such as the target side end D3, and is adjacent to and spaced from the first NFC antenna 1. Therefore, in some embodiments, Fig.18 As shown, the first NFC antenna 1 and the second NFC antenna 6 are arranged at the same vertex position / corner position of the electronic device 200, and are respectively arranged at the top end D1 / bottom end D2 and the side end D3, and as a whole form an "L"-shaped bending structure with a gap X1 in the middle.

[0193] See also Fig.19 , is another schematic plan view of the electronic device 200 in some embodiments of the present application. Fig.19 It may also be a top view schematic diagram illustrating the structure of the NFC antenna assembly 100 from the front side of the electronic device 200, that is, from the viewing direction of one side of the display screen.

[0194] in, Fig.19 To include Figure 1 The NFC antenna assembly 100 shown is used as an example for illustration. That is, in some embodiments, the NFC antenna assembly 100 may include only one NFC antenna, namely, the first NFC antenna 1 .

[0195] As mentioned above, the electronic device 200 includes a top end D1, a bottom end D2 and two side ends D3, the main board 201 is spaced apart from the top end D1 or the bottom end D2, and the second end 1b of the first NFC antenna 1 is located at the top end D1 or the bottom end D2, or is located close to the top end D1 or the bottom end D2, and therefore, is also spaced apart from the main board 201, and can be grounded by being connected to the middle frame 202.

[0196] In some embodiments, Fig.19 As shown, the main board 201 is disposed close to one of the target side ends D3 and is spaced apart from the top end D1 or the bottom end D2. The distance between the main board 201 and the target side end D3 is smaller than the distance to the top end D1 or the bottom end D2.

[0197] In some embodiments, Fig.19 As shown, a portion of the first NFC antenna 1 including the second end 1b is located at the top end D1 or the bottom end D2, and another portion of the first NFC antenna 1 including the first end 1a is located at the target side end D3.

[0198] That is, in some embodiments, part of the first NFC antenna 1 is located at the top end D1 or the bottom end D2, and the other part is located at the side end D3, and is set at the top corner position / corner position of the electronic device 200, so that the space of the electronic device 200 can be used as much as possible to set the NFC antenna, without occupying the space of other antennas. In addition, since the distance between the top end D1 or the bottom end D2 and the main board 201 is relatively far, when the part of the first NFC antenna 1 including the second end 1b is located at the top end D1 or the bottom end D2, and since the other part of the first NFC antenna 1 including the first end 1a is located at the target side end D3, it can be more convenient to be electrically connected to the first transmitting processing circuit 3 and the first receiving processing circuit 4 set on the main board 201 through a feeding connector such as a feeding spring.

[0199] Among them, Fig.19 As shown, the main board 201 is at least spaced apart from the bottom end D2. Fig.19 In the figure, a part of the first NFC antenna 1 is located at the bottom end D2, and another part is located at the target side end D3.

[0200] In some embodiments, the first NFC antenna 1 may also be disposed as a whole at the target side end D3, and the second end 1b of the first NFC antenna 1 is disposed close to the top end D1 or the bottom end D2, for example, the distance between the second end 1b and the top end D1 or the bottom end D2 is less than a preset distance, for example, less than 1 cm.

[0201] In some embodiments, as mentioned above, the first NFC antenna 1 may also be entirely disposed at the top end D1 or the bottom end D2.

[0202] in, Fig.19 This is merely to illustrate the structure including only the first NFC antenna 1 . For details about the structure and configuration of the first NFC antenna 1 , please refer to the aforementioned related contents.

[0203] The electronic device 200 may be any device including an antenna, such as a mobile phone, a tablet computer, a smart watch, a laptop computer, etc. The electronic device 200 may be a tablet electronic device or a foldable electronic device. The electronic device 200 may also include other structures, such as a processor, a memory, a speaker, etc., which are irrelevant to the improvement of the present application and are not described in detail here.

[0204] The NFC antenna assembly 100 and the electronic device 200 of the present application, through the first NFC antenna 1, only the first end 1a is connected to the NFC chip 2 to receive feeding, and the second end 1b of the first NFC antenna 1 is grounded. Since the grounding can be directly connected to a structure such as a middle frame or a metal back shell, it is not necessary to be connected to the mainboard, so the setting position of the first NFC antenna 1 can be more flexible. Alternatively, only the third end 6a of the second NFC antenna 6 is connected to the NFC chip 2 to receive feeding, and the fourth end 6b of the second NFC antenna 6 is grounded. Since the grounding can be directly connected to a structure such as a middle frame or a metal back shell, it is not necessary to be connected to the mainboard, so the setting position of the second NFC antenna 6 can be more flexible, and the setting requirements of the NFC antenna can be met in an environment where the clearance area is getting smaller and smaller. In addition, in the present application, through the NFC antenna assembly 100 in some of the aforementioned embodiments, for example, through the output conversion circuit 5, the receiving and transmitting performance of the NFC communication frequency band can be improved through a simple structure; and in some embodiments, the first NFC antenna 1 and / or the second NFC antenna 6 can also be shared by other frequency bands to support the reception and transmission of electromagnetic wave signals in other frequency bands, and can support multiple frequency bands without increasing the size, and can effectively avoid interference by setting an isolation unit.

[0205] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0206] The above description is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application; in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. An NFC antenna assembly, characterized in that: include: A first NFC antenna, used to support the transmission and reception of electromagnetic wave signals in an NFC communication frequency band, wherein the first NFC antenna comprises a first end and a second end opposite to each other, and the second end is grounded; An NFC chip, comprising a first transmitting port and a first receiving port; A first transmission processing circuit is coupled at least between the first transmission port of the NFC chip and the first end of the first NFC antenna, and is used to at least achieve matching tuning of the NFC communication frequency band; The first receiving processing circuit is coupled between the first receiving port of the NFC chip and the first end of the first NFC antenna, and is used to at least filter the electromagnetic wave signal in the NFC communication frequency band received by the first NFC antenna.

2. The NFC antenna assembly according to claim 1, characterized in that: The NFC chip also includes a second transmitting port, and the NFC antenna assembly also includes an output conversion circuit, the output conversion circuit includes two input ends and an output end, the two input ends are respectively connected to the first transmitting port and the second transmitting port, and the output end is connected to the first transmitting processing circuit, and the output conversion circuit is used to convert a first NFC feed signal output by the first transmitting port and a second NFC feed signal output by the second transmitting port into one NFC output feed signal, and output it through the output end.

3. The NFC antenna assembly according to claim 2, characterized in that: The first NFC feed signal and the second NFC feed signal are both AC signals with the same amplitude and frequency and opposite phases. The NFC output feed signal is also an AC signal with the same frequency as the first NFC feed signal and the second NFC feed signal.

4. The NFC antenna assembly according to claim 3, characterized in that: The output conversion circuit includes a phase adjustment circuit, and the phase adjustment circuit is used to adjust the phases of the first NFC feed signal and the second NFC feed signal to be the same and then synthesize them to generate the NFC output feed signal.

5. The NFC antenna assembly according to claim 4, characterized in that: The phase adjustment circuit includes a first phase adjustment element and a second phase adjustment element, one end of the first phase adjustment element is connected to the first transmitting port and serves as an input end of the output conversion circuit, one end of the second phase adjustment element is connected to the second transmitting port and serves as another input end of the output conversion circuit, the other end of the first phase adjustment element and the other end of the second phase adjustment element are connected to serve as the output end, the phase of the first NFC feed signal after passing through the first phase adjustment element is the same as the phase of the second NFC feed signal after passing through the second phase adjustment element, and the NFC output feed signal is synthesized at the connection point of the other end of the first phase adjustment element and the other end of the second phase adjustment element, wherein the amplitude of the NFC output feed signal is the sum of the amplitudes of the first NFC feed signal and the second NFC feed signal.

6. The NFC antenna assembly according to claim 5, characterized in that: The first phase-adjusting element is one of an inductor and a capacitor, and the second phase-adjusting element is the other of an inductor and a capacitor.

7. The NFC antenna assembly according to claim 3, characterized in that: The output conversion circuit includes a first balun circuit, which includes a first input coil and a first output coil, wherein two ends of the first input coil are respectively connected to the first transmitting port and the second transmitting port and serve as two input ends of the output conversion circuit, one end of the first output coil is grounded, and the other end is connected to the first transmitting processing circuit and serves as an output end of the output conversion circuit, and the first balun circuit converts a first NFC feed signal output by the first transmitting port and a second NFC feed signal output by the second transmitting port into one NFC output feed signal, and outputs it through the output end.

8. The NFC antenna assembly according to claim 2, characterized in that: The NFC chip further includes a second receiving port, and the second receiving port is grounded via a receiving filter capacitor.

9. The NFC antenna assembly according to claim 1, characterized in that: The NFC chip further includes a second transmitting port and a second receiving port, wherein the second transmitting port is suspended and the second receiving port is grounded via a receiving filter capacitor.

10. The NFC antenna assembly according to claim 1, characterized in that: The first transmission processing circuit and the first reception processing circuit share part of the circuit structure.

11. The NFC antenna assembly according to claim 10, characterized in that: The first transmitting processing circuit includes a first capacitor and a second capacitor, and the first receiving processing circuit includes the first capacitor and a third capacitor. One end of the first capacitor is coupled to the first end of the first NFC antenna, and the other end is grounded. The second capacitor is coupled between the first transmitting port and the remote end of the first capacitor, and the third capacitor is coupled between the first receiving port and the remote end of the first capacitor. The first capacitor and the second capacitor cooperate to at least achieve matching tuning of the NFC communication frequency band, and the first capacitor and the third capacitor cooperate to at least achieve filtering of electromagnetic wave signals in the NFC communication frequency band received by the first NFC antenna.

12. The NFC antenna assembly according to claim 2, characterized in that: The NFC chip further includes a second transmitting port and a second receiving port, the NFC antenna assembly further includes a second NFC antenna, a second transmitting processing circuit and a second receiving processing circuit, the second NFC antenna also supports the transmission and reception of electromagnetic wave signals in the NFC communication frequency band, the second NFC antenna includes a third end and a fourth end opposite to each other, the fourth end is grounded, and the second transmitting processing circuit is connected between the output end of the output conversion circuit and the third end of the second NFC antenna, for at least realizing matching tuning of the NFC communication frequency band; The second receiving processing circuit is coupled between the second receiving port of the NFC chip and the third end of the second NFC antenna, and is used to at least filter the electromagnetic wave signal in the NFC communication frequency band received by the second NFC antenna.

13. The NFC antenna assembly according to claim 1, characterized in that: The NFC chip further includes a second transmitting port and a second receiving port, and the NFC antenna assembly further includes: A second NFC antenna supports the transmission and reception of electromagnetic wave signals in the NFC communication frequency band, wherein the second NFC antenna includes a third end and a fourth end opposite to each other, and the fourth end is grounded; a second transmission processing circuit, coupled between the second transmission port and the third end of the second NFC antenna, for at least achieving matching tuning of the NFC communication frequency band; and The second receiving processing circuit is coupled between the second receiving port and the third end of the second NFC antenna, and is used to at least filter the electromagnetic wave signal in the NFC communication frequency band received by the second NFC antenna.

14. The NFC antenna assembly according to claim 13, characterized in that: The first transmission processing circuit and the first reception processing circuit share a part of the circuit structure, and the second transmission processing circuit and the second reception processing circuit also share a part of the circuit structure.

15. The NFC antenna assembly according to claim 14, characterized in that: The first transmitting processing circuit includes a first capacitor and a second capacitor, and the first receiving processing circuit includes the first capacitor and a third capacitor. One end of the first capacitor is coupled to the first end of the first NFC antenna, and the other end is grounded. The second capacitor is coupled between the first transmitting port and the remote end of the first capacitor, and the third capacitor is coupled between the first receiving port and the remote end of the first capacitor. The first capacitor and the second capacitor cooperate to at least achieve matching tuning of the NFC communication frequency band, and the first capacitor cooperates with the third capacitor to at least achieve filtering of electromagnetic wave signals in the NFC communication frequency band received by the first NFC antenna; the second transmitting processing circuit includes a fourth capacitor and a fifth capacitor, and the second receiving processing circuit includes the fourth capacitor and a sixth capacitor. One end of the fourth capacitor is coupled to the third end of the second NFC antenna, and the other end is grounded. The fifth capacitor is coupled between the second transmitting port and the remote end of the fourth capacitor, and the sixth capacitor is coupled between the second receiving port and the remote end of the fourth capacitor. The fourth capacitor and the fifth capacitor cooperate to at least achieve matching tuning of the NFC communication frequency band, and the fourth capacitor cooperates with the sixth capacitor to at least achieve filtering of electromagnetic wave signals in the NFC communication frequency band received by the second NFC antenna.

16. The NFC antenna assembly according to claim 15, characterized in that: The NFC antenna assembly further includes a jumper capacitor connected between a remote end of the first capacitor and a remote end of the fourth capacitor.

17. The NFC antenna assembly according to claim 13, characterized in that: The NFC antenna assembly further includes a crossover capacitor, the crossover capacitor includes a first crossover end and a second crossover end, the first crossover end and the second crossover end are respectively coupled to the first end of the first NFC antenna and the third end of the second NFC antenna; the first transmitting processing circuit includes a second capacitor, the first receiving processing circuit includes a third capacitor, the second capacitor is coupled between the first transmitting port and the first crossover end of the crossover capacitor, the third capacitor is coupled between the first receiving port and the first crossover end of the crossover capacitor, at least the second capacitor is used to achieve matching tuning of the NFC communication frequency band, and at least the third capacitor is used to achieve filtering of the electromagnetic wave signal of the NFC communication frequency band received by the first NFC antenna; the second transmitting processing circuit includes a fifth capacitor, the second receiving processing circuit includes a sixth capacitor, the fifth capacitor is coupled between the second transmitting port and the second crossover end of the crossover capacitor, the sixth capacitor is coupled between the second receiving port and the second crossover end of the crossover capacitor, at least the fifth capacitor is used to achieve matching tuning of the NFC communication frequency band, and at least the sixth capacitor is used to achieve filtering of the electromagnetic wave signal of the NFC communication frequency band received by the second NFC antenna.

18. The NFC antenna assembly according to claim 17, characterized in that: The NFC antenna assembly also includes a second balun circuit, which includes a second input coil and a second output coil, wherein two ends of the second input coil are respectively connected to the first transmitting port and the second transmitting port, one end of the first output coil is connected to the first transmitting processing circuit, and the other end is connected to the second transmitting processing circuit.

19. The NFC antenna assembly according to claim 1, characterized in that: The first NFC antenna is reused as an antenna branch of other frequency bands. The NFC antenna assembly also includes a first isolation unit, which is located between the first transmission processing circuit, the first reception processing circuit and the first end of the first NFC antenna, and is used to achieve isolation between the electromagnetic wave signals of the NFC communication frequency band and the electromagnetic wave signals of other frequency bands.

20. The NFC antenna assembly according to claim 13, characterized in that: The second NFC antenna is reused as an antenna branch of other frequency bands. The NFC antenna assembly also includes a second isolation unit. The first isolation unit is located between the second transmitting processing circuit, the second receiving processing circuit and the third end of the second NFC antenna, and is used to achieve isolation between the electromagnetic wave signals of the NFC communication frequency band and the electromagnetic wave signals of other frequency bands.

21. An electronic device, characterized in that: The electronic device comprises the NFC antenna assembly according to any one of claims 1 to 20.

22. The electronic device according to claim 21, characterized in that: The electronic device includes a frame, and at least the first NFC antenna is a metal segment arranged on the frame.

23. The electronic device according to claim 21, characterized in that: The electronic device includes a main board, and the first end of the first NFC antenna is closer to the main board than the second end.

24. The electronic device according to claim 21, characterized in that: The electronic device includes a main board, the electronic device includes a top end, a bottom end, and two side ends, the main board is spaced apart from the top end or the bottom end, a portion of the first NFC antenna including the second end is located at the top end or the bottom end, and another portion of the first NFC antenna including the first end is located at one of the side ends.

25. The electronic device according to claim 21, characterized in that: The electronic device includes a main board and a USB interface, and the electronic device includes a top end, a bottom end and two side ends, the USB interface is arranged at the bottom end, the main board is at least spaced apart from the bottom end, the first NFC antenna is located at the bottom end, and the second end of the first NFC antenna is closer to the USB interface than the first end.

26. The electronic device according to claim 21, characterized in that: The electronic device includes a main board, and the electronic device includes a top end, a bottom end, and two side ends, the main board is spaced apart from the top end or the bottom end, the first NFC antenna is located at one of the side ends, and the second end of the first NFC antenna is closer to the top end or the bottom end than the first end.

27. The electronic device according to any one of claims 24 to 26, characterized in that: When the NFC antenna assembly further includes a second NFC antenna, the second NFC antenna is disposed at one of the side ends and is adjacent to and spaced apart from the first NFC antenna.

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