Electronic device

Abstract

The invention provides electronic equipment, and relates to the technical field of electronic equipment. The electronic equipment comprises a rear cover, a camera decorating part, a near field communication antenna and a metal part, the camera decorating part is mounted on the rear cover; the near field communication antenna is arranged around the frame of the camera decorating part and is attached to the surface of the frame of the camera decorating part; the metal piece is arranged in an area enclosed by the near field communication antenna; wherein a gap is formed between the metal piece and the near field communication antenna, so that the metal piece is electromagnetically coupled with the near field communication antenna through the gap, and the radiation performance of the near field communication antenna is further adjusted. The near-field communication antenna is arranged around the frame of the camera decorating part and is attached to the surface of the frame, so that the peripheral space of the camera decorating part is fully utilized, the antenna layout flexibility and the space utilization rate are improved, and the user experience is improved.

Description

Technical Field

[0001] This disclosure relates to the field of electronic equipment technology, and more specifically, to an electronic device. Background Technology

[0002] Near Field Communication (NFC) is an emerging technology that allows devices to exchange data when they are close to each other. By integrating inductive card readers, inductive cards, and peer-to-peer communication functions onto a chip, NFC enables applications such as mobile payment, electronic ticketing, access control, mobile identity recognition, and anti-counterfeiting.

[0003] In related technologies, electronic devices use ferrite antennas as NFC antennas, which are set below the camera decoration on the upper half of the back cover. This arrangement occupies a large area, is costly, and affects the user experience when the user holds the lower half of the device. Summary of the Invention

[0004] This disclosure provides an electronic device that at least partially solves the problems in the related art.

[0005] According to a first aspect of the present disclosure, an electronic device is provided, comprising: a back cover; a camera trim piece mounted on the back cover; an NFC antenna disposed around the frame of the camera trim piece and attached to the surface of the frame of the camera trim piece; and a metal piece disposed within the area enclosed by the NFC antenna, wherein a gap is provided between the metal piece and the NFC antenna; wherein the metal piece electromagnetically couples with the NFC antenna through the gap to adjust the radiation performance of the NFC antenna.

[0006] In some embodiments of this disclosure, the metal part is provided with one or more through holes; the one or more through holes are correspondingly provided with the camera assembly and are used to avoid the camera assembly.

[0007] In some embodiments of this disclosure, the width of the gap ranges from 1.5 mm to 2.5 mm.

[0008] In some embodiments of this disclosure, the NFC antenna has an opening, a first end of which is provided with a first antenna connection terminal, and a second end of which is provided with a second antenna connection terminal.

[0009] In some embodiments of this disclosure, the electronic device further includes an NFC chip and an antenna front-end circuit. The NFC chip includes a first transmitting port, a second transmitting port, a first receiving port, and a second receiving port. The antenna front-end circuit is electrically connected to the first antenna connection terminal, the second antenna connection terminal, the first transmitting port, the second transmitting port, the first receiving port, and the second receiving port, respectively.

[0010] In some embodiments of this disclosure, the antenna front-end circuit includes a matching circuit; the matching circuit is used to achieve impedance matching between the NFC chip and the NFC antenna.

[0011] In some embodiments of this disclosure, the matching circuit includes a first matching branch and a second matching branch; the first matching branch includes a first capacitor, a second capacitor, and a first resistor, the first capacitor and the first resistor being connected in series between a first terminal and a third terminal of the matching circuit, one end of the second capacitor being electrically connected between the first capacitor and the first resistor, and the other end of the second capacitor being grounded; the second matching branch includes a third capacitor, a fourth capacitor, and a second resistor, the third capacitor and the second resistor being connected in series between a second terminal and a fourth terminal of the matching circuit, one end of the fourth capacitor being electrically connected between the third capacitor and the second resistor, and the other end of the fourth capacitor being grounded.

[0012] In some embodiments of this disclosure, the first capacitor, the second capacitor, the third capacitor, and the fourth capacitor are each composed of one or more capacitor elements connected in parallel.

[0013] In some embodiments of this disclosure, the antenna front-end circuit further includes an antenna interface circuit, a filtering circuit, a first receiving branch, and a second receiving branch; a first terminal of the antenna interface circuit is electrically connected to the first antenna connection terminal, a second terminal of the antenna interface circuit is electrically connected to the second antenna connection terminal, a third terminal of the antenna interface circuit is electrically connected to the first terminal of the matching circuit, and a fourth terminal of the antenna interface circuit is electrically connected to the second terminal of the matching circuit; the third terminal of the matching circuit is electrically connected to a first node, and the fourth terminal of the matching circuit is electrically connected to a second node; a first terminal of the filtering circuit is electrically connected to the first node, a second terminal of the filtering circuit is electrically connected to the second node, a third terminal of the filtering circuit is electrically connected to the first transmitting port, and a fourth terminal of the filtering circuit is electrically connected to the second transmitting port; a first terminal of the first receiving branch is electrically connected to the first node, and a second terminal of the first receiving branch is electrically connected to the first receiving port; a first terminal of the second receiving branch is electrically connected to the second node, and a second terminal of the second receiving branch is electrically connected to the second receiving port.

[0014] In some embodiments of this disclosure, the filtering circuit includes a first filtering branch and a second filtering branch; the first filtering branch includes a first inductor and a fifth capacitor, the first inductor being electrically connected between a first terminal and a third terminal of the filtering circuit, one end of the fifth capacitor being electrically connected between the first inductor and the first node, and the other end of the fifth capacitor being grounded; the second filtering branch includes a second inductor and a sixth capacitor, the second inductor being electrically connected between a second terminal and a fourth terminal of the filtering circuit, one end of the sixth capacitor being electrically connected between the second inductor and the second node, and the other end of the sixth capacitor being grounded.

[0015] In some embodiments of this disclosure, both the fifth capacitor and the sixth capacitor are composed of one or more capacitor elements connected in parallel.

[0016] In some embodiments of this disclosure, the antenna interface circuit includes a seventh capacitor, which is electrically connected between a first terminal and a second terminal of the antenna interface circuit.

[0017] In some embodiments of this disclosure, the first receiving branch includes a third resistor and an eighth capacitor, the third resistor and the eighth capacitor being connected in series between a first terminal and a second terminal of the first receiving circuit; the second receiving branch includes a fourth resistor and a ninth capacitor, the fourth resistor and the ninth capacitor being connected in series between a first terminal and a second terminal of the second receiving circuit.

[0018] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects: By surrounding and attaching the NFC antenna to the surface of the camera trim, the space around the trim is fully utilized. A frame antenna replaces the ferrite antenna used in related technologies, solving the problems of large area occupation and high cost associated with ferrite antennas. This improves the flexibility and space utilization of the antenna layout, and avoids the user's hand area, reducing the impact of hand obstruction on near-field communication performance. This enhances the user experience of NFC functionality in scenarios such as mobile payments and card swiping. Furthermore, the metal components within the NFC antenna area form electromagnetic coupling with the NFC antenna through gaps, which can adjust the antenna's radiation performance, further improving communication stability and sensing efficiency.

[0019] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0021] Figure 1 This is a schematic diagram of the structure of an electronic device according to an exemplary embodiment of the present disclosure. Figure 1 .

[0022] Figure 2 This is a structural diagram of the camera trim and NFC antenna on the back cover of electronic devices in related technologies.

[0023] Figure 3 This is a schematic diagram of the structure of an electronic device according to an exemplary embodiment of the present disclosure. Figure 2 .

[0024] Figure 4 This is a circuit structure of an antenna front-end circuit according to an exemplary embodiment of the present disclosure. Figure 1 .

[0025] Figure 5 This is a circuit structure of an antenna front-end circuit shown according to an exemplary embodiment of the present disclosure. Figure 2 .

[0026] Figure 6 This is a block diagram of an electronic device according to an exemplary embodiment of the present disclosure.

[0027] Explanation of reference numerals in the attached figures: 10. Back cover; 20. Camera decorative piece; 30. NFC antenna; 31. Opening; 311. First antenna connection end; 312. Second antenna connection end; 40. Metal part; 41. Through hole; 50. Gap; 60. NFC chip; 61. First transmitting port; 62. Second transmitting port; 63. First receiving port; 64. Second receiving port; 70. Antenna front-end circuit; 71. Matching circuit; 711. First matching branch; 712. Second matching branch; 72. Antenna interface circuit; 73. Filtering circuit; 731. First filtering branch; 732. Second filtering branch; 74. First receiving branch; 75. Second receiving branch. Detailed Implementation

[0028] Some exemplary embodiments of this disclosure will be described in detail herein, examples of which are illustrated in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. Various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will become apparent upon understanding this disclosure. For example, the order of operations described herein is merely illustrative and is not limited to those orders set forth herein, but can be changed as will become apparent upon understanding this disclosure, except for operations that must be performed in a particular order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0029] The embodiments described below are exemplary and do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0030] The specific embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings.

[0031] Figure 1 This is a schematic diagram of the structure of an electronic device according to an exemplary embodiment of the present disclosure. Figure 1 For example, electronic devices can be tablet computers, mobile phones, e-readers, MP3 players, MP4 players, laptops, in-vehicle systems or desktop computers, portable terminals, laptop terminals, desktop terminals, action cameras, drones, monitor cameras, and similar products.

[0032] like Figure 1 As shown, the electronic device includes a back cover 10, a camera trim 20, an NFC antenna 30, and a metal part 40.

[0033] The back cover 10 forms the external outline of the electronic device. During the molding process of the back cover 10, structures such as mounting holes for a rear camera, a fingerprint recognition module, and antenna components can be formed on the back cover. For example, the back cover 10 can be a metal back cover or a non-metal back cover, such as a plastic back cover or a glass back cover.

[0034] like Figure 1 As shown, the camera decorative piece 20 is disposed on the back cover 10 and is used to surround and decorate the camera of the electronic device. Specifically, the camera decorative piece 20 is installed at the pre-formed rear camera mounting hole on the back cover 10, and cooperates with the back cover 10 to fix the camera, serving the functions of structural support, aesthetic enhancement, and dust and water protection.

[0035] The camera trim 20 has a frame surrounding its edges, which can be made of metal or a high-hardness non-metallic material, providing a good appearance and wear resistance. For example, the camera trim 20 can be made of materials such as stainless steel, aluminum alloy, ceramic, or coated plastic to match the overall design style of the electronic device.

[0036] In this embodiment, such as Figure 1 As shown, the NFC antenna 30 is arranged around the frame of the camera trim 20 and attached to the frame surface. For example, the NFC antenna 30 is arranged in the form of a metal strip around the frame of the camera trim 20, forming a radiating structure attached to the frame surface, thereby constituting the NFC antenna of the electronic device.

[0037] The shape of the NFC antenna is adapted to the shape of the camera trim 20. In one possible implementation, if the camera trim 20 is circular, the NFC antenna 30 is correspondingly a ring structure. In another possible implementation, if the camera trim 20 is rectangular, the NFC antenna 30 is a rectangular ring structure with rounded or right-angled corners.

[0038] In this embodiment, such as Figure 1 As shown, the metal component 40 is disposed within the area enclosed by the NFC antenna 30, and a gap 50 is provided between the metal component 40 and the NFC antenna 30. This arrangement allows the metal component 30 to electromagnetically couple with the NFC antenna 30 through the gap 50, thereby adjusting the radiation performance of the NFC antenna 30.

[0039] The metal component 40 can be made of a material with good electrical conductivity, such as copper, aluminum, or their alloys, to ensure effective electromagnetic coupling. Depending on the specific shape of the NFC antenna 30 (e.g., a circular or rectangular ring), the metal component 40 can be designed with a corresponding geometry, such as circular or rectangular, to ensure it matches the area enclosed by the NFC antenna 30. The metal component 40 electromagnetically couples with the NFC antenna 30 through the gap 50, creating a parasitic effect that makes the metal component 40 an integral part of the NFC antenna 30, enhancing the overall performance of the antenna.

[0040] In some embodiments of this disclosure, the width of the gap 50 ranges from 1.5 mm to 2.5 mm. The width of the gap 50 is closely related to the required coupling strength and the operating frequency band of the NFC antenna 30, and can be set within the range of 1.5 mm to 2.5 mm to achieve optimal performance. For example, the width of the gap 50 can be set to 2 mm.

[0041] Since the NFC antenna 30 is positioned around the frame of the camera trim 20, it can be a circular ring, a rectangular ring, or other ring-shaped structure. The metal part 40 is located within the area enclosed by the NFC antenna 30, and a gap 50 is provided between the two. Therefore, the gap 50 is a uniform spacing around the metal part 40 and the NFC antenna 30. To ensure uniform and effective electromagnetic coupling, the gap 50 should maintain a consistent width to avoid overall performance degradation due to excessively narrow or wide local areas.

[0042] The electronic device according to the embodiments of this disclosure sets the width of the gap 50 in the range of 1.5mm to 2.5mm, which enables efficient electromagnetic coupling between the NFC antenna 30 and the metal part 40, optimizes the radiation characteristics of the NFC antenna, and enables high-performance NFC function even under camera decorative parts 20 of different shapes, while maintaining the aesthetics and compactness of the device.

[0043] In addition, electronic devices also include displays, mid-frame components, and circuit boards. Figure 1 (Not shown in the image). The mid-frame assembly, as an important structural component of the electronic device, may include a mid-plate and a frame surrounding the mid-plate. The display screen, the mid-plate of the mid-frame assembly, and the rear cover are stacked sequentially. Reception spaces are formed between the display screen and the mid-plate of the mid-frame assembly, and between the mid-plate of the mid-frame assembly and the rear cover, to accommodate circuit boards, camera modules, batteries, various sensors, and other devices. One side of the frame of the mid-frame assembly surrounds the edge of the display screen, and the other side surrounds the edge of the rear cover 10, forming the complete external structure of the electronic device.

[0044] The middle plate of the mid-frame assembly can serve as a ground plane for electronic devices, providing electromagnetic shielding or reference potential for circuit boards, antennas, etc., and reducing signal interference. The frame of the mid-frame assembly can be a frame structure with through holes. The frame of the mid-frame assembly can be a non-metallic frame or a metal frame such as aluminum alloy or magnesium alloy. For example, the frame of the mid-frame assembly can be a rounded rectangular frame.

[0045] The circuit board can be housed within the space formed by the frame and back cover of the mid-frame assembly. The circuit board can be a printed circuit board (PCB) or a flexible printed circuit board (FPC). Radio frequency (RF) circuitry for processing RF signals, as well as controllers for controlling the operation of electronic devices, can be integrated onto the circuit board.

[0046] Figure 2 This is a structural diagram of the camera trim and NFC antenna on the back cover of an electronic device in related technologies. (Example:) Figure 2As shown, on the back cover of the electronic device, a camera trim is placed in the upper half. A ferrite antenna is used as the NFC antenna for the electronic device, positioned below the camera trim. The area of ​​this ferrite antenna must meet the requirement of 600 mm². 2 It can be seen that ferrite antennas occupy a large area and are expensive. Furthermore, when the user holds the lower half of the electronic device, the hand can obstruct the communication performance, affecting the user experience in NFC application scenarios such as mobile payment and card swiping.

[0047] In contrast, the electronic device of this disclosure, by arranging the NFC antenna 30 around the frame of the camera decorative piece 20 and attaching it to its surface, makes full use of the space around the camera decorative piece 20. It uses a frame antenna instead of the ferrite antenna in the related technology, which solves the problems of large area occupation and high cost of ferrite antenna in the related technology. It improves the flexibility of antenna layout and space utilization, and can avoid the user's hand holding area, reducing the impact of hand obstruction on NFC performance, thereby improving the user experience of NFC function in mobile payment, card swiping and other scenarios. In addition, the metal part 40 in the area surrounded by the NFC antenna 30 forms electromagnetic coupling with the NFC antenna 30 through the gap, which can adjust the radiation performance of the antenna and further improve the communication stability and sensing efficiency of the antenna.

[0048] In some embodiments of this disclosure, such as Figure 1 As shown, the metal part 40 is provided with one or more through holes 41. The one or more through holes 41 are correspondingly provided with the camera assembly and are used to avoid the camera assembly.

[0049] Since the metal part 40 is located within the area enclosed by the NFC antenna 30, which is positioned around the frame of the camera decorative part 20, the position of the metal part 40 overlaps with the camera assembly. Therefore, one or more through holes 41 are formed on the metal part 40. These through holes 41 correspond to the positions of camera components such as the lens, focusing motor, optical image stabilization assembly, or infrared sensor, avoiding obstruction of the camera assembly and ensuring that its performance is not affected.

[0050] In some embodiments of this disclosure, such as Figure 1 As shown, the NFC antenna 30 has an opening 31, with a first antenna connection terminal 311 at the first end of the opening and a second antenna connection terminal 312 at the second end of the opening.

[0051] The NFC antenna 30 is designed with an opening 31, that is, the NFC antenna 30 is a non-closed ring-shaped radiating structure set around the frame of the camera trim 20. This non-closed design allows for more flexible adjustment of the antenna's electrical characteristics to optimize its operating efficiency in the operating frequency band (e.g., 13.56 MHz).

[0052] The first end of the opening 31 is provided with a first antenna connection end 311, and the second end of the opening 31 is provided with a second antenna connection end 312. These two ends can be used as feed points to transmit radio frequency signals from the NFC chip to the NFC antenna 30.

[0053] Figure 3 This is a schematic diagram of the structure of an electronic device according to an exemplary embodiment of the present disclosure. Figure 2 .like Figure 3 As shown, the electronic device also includes an NFC chip 60 and an antenna front-end circuit 70, with the antenna front-end circuit 70 electrically connected between the NFC chip 60 and the NFC antenna 30.

[0054] The NFC chip 60 includes a first transmitting port 61, a second transmitting port 62, a first receiving port 63, and a second receiving port 64. The antenna front-end circuit 70 is electrically connected to the first antenna connection terminal 311, the second antenna connection terminal 312, the first transmitting port 61, the second transmitting port 62, the first receiving port 63, and the second receiving port 64, respectively.

[0055] In this embodiment, the NFC chip 60 is responsible for generating and processing the radio frequency signals required for NFC communication. The first transmit port 61 and the second transmit port 62 of the NFC chip 60 are used to transmit radio frequency signals to the antenna front-end circuit 70, and the first receive port 63 and the second receive port 64 of the NFC chip 60 are used to receive radio frequency signals from the antenna front-end circuit 70.

[0056] The antenna front-end circuit 70 is located between the NFC chip 60 and the NFC antenna 30, and serves the functions of filtering and impedance matching. Filtering removes unwanted frequency components, ensuring that only signals within the operating frequency band are transmitted or received. Impedance matching adjusts circuit parameters to maximize energy transfer efficiency and reduce reflection loss.

[0057] The antenna front-end circuit 70 is electrically connected to the first antenna connection terminal 311 and the second antenna connection terminal 312 of the NFC antenna 30, respectively. At the same time, the antenna front-end circuit 70 is electrically connected to the first transmitting port 61, the second transmitting port 62, the first receiving port 63 and the second receiving port 64 of the NFC chip 60, respectively, forming a complete signal path.

[0058] In the electronic device of this embodiment, the NFC chip 60 is responsible for generating and processing radio frequency (RF) signals, and transmits the signals to the antenna front-end circuit 70 through its first transmit port 61 and second transmit port 62. The antenna front-end circuit 70 then transmits the signals to the first antenna connection terminal 311 and the second antenna connection terminal 312 of the NFC antenna 30, ensuring effective transmission of signals in the operating frequency band while maximizing energy transfer efficiency and reducing reflection loss. Conversely, when the NFC antenna 30 receives an RF signal, the RF signal is input to the antenna front-end circuit 70 through the first antenna connection terminal 311 and the second antenna connection terminal 312, and then transmitted to the first receive port 63 and the second receive port 64 of the NFC chip 60 for processing, thereby completing signal reception. Through the coordinated operation and efficient connection between the NFC chip 60, the antenna front-end circuit 70, and the NFC antenna 30, NFC performance is improved.

[0059] Figure 4 This is a circuit structure of an antenna front-end circuit according to an exemplary embodiment of the present disclosure. Figure 1 .like Figure 4 As shown, the antenna front-end circuit 70 includes a matching circuit 71, which is used to achieve impedance matching between the NFC chip 60 and the NFC antenna 30.

[0060] The matching circuit 71 consists of components such as inductors and capacitors, and its circuit parameters are designed and tuned according to the NFC operating frequency band (e.g., 13.56MHz) and the equivalent impedance of the NFC antenna 30. When the NFC chip 60 outputs radio frequency signals through the first transmit port 61 and the second transmit port 62, the signal is regulated by the matching circuit 71 and then fed into the NFC antenna 30 to enhance its radiation capability. In receive mode, the signal received by the NFC antenna 30 also undergoes impedance conversion and signal transmission through the matching circuit 71 to ensure that the NFC chip 60 can receive signals accurately.

[0061] By adjusting the impedance characteristics of the matching circuit 71, the output impedance of the NFC chip 60 is matched with the input impedance of the NFC antenna 30, thereby maximizing the transmission efficiency of the radio frequency signal and reducing signal reflection and energy loss.

[0062] In some embodiments of this disclosure, such as Figure 4 As shown, the antenna front-end circuit 70 also includes an antenna interface circuit 72, a filter circuit 73, a first receiving branch 74, and a second receiving branch 75.

[0063] The first end of the antenna interface circuit 72 is electrically connected to the first antenna connection end 311, the second end of the antenna interface circuit 72 is electrically connected to the second antenna connection end 312, the third end of the antenna interface circuit 72 is electrically connected to the first end of the matching circuit 71, and the fourth end of the antenna interface circuit 72 is electrically connected to the second end of the matching circuit 71.

[0064] In this embodiment, the antenna interface circuit 72 serves as the connection hub between the NFC antenna 30 and subsequent radio frequency circuits. Its first terminal is electrically connected to the first antenna connection terminal 311 of the NFC antenna 30, its second terminal is electrically connected to the second antenna connection terminal 312, its third terminal is connected to the first terminal of the matching circuit 71, and its fourth terminal is connected to the second terminal of the matching circuit 71. This antenna interface circuit 72 can protect components or impedance adjustment structures, enhancing anti-interference capabilities and ensuring signal integrity.

[0065] The third terminal of the matching circuit 71 is electrically connected to the first node N1, and the fourth terminal of the matching circuit 71 is electrically connected to the second node N2.

[0066] In this embodiment, the matching circuit 71 is used to achieve impedance matching between the NFC chip 60 and the NFC antenna 30. Its third terminal is connected to the first node N1, and its fourth terminal is connected to the second node N2. By adjusting the circuit parameters of the matching circuit 71, the equivalent impedance of the antenna terminal is matched with the output impedance of the chip, thereby improving energy transmission efficiency and reducing reflection loss. The first terminal of the filter circuit 73 is electrically connected to the first node N1, the second terminal of the filter circuit 73 is electrically connected to the second node N2, the third terminal of the filter circuit 73 is electrically connected to the first transmitting port 61, and the fourth terminal of the filter circuit 73 is electrically connected to the second transmitting port 62.

[0067] In this embodiment, the filter circuit 73 is connected between nodes N1 and N2. Its first end is connected to the first node N1, its second end is connected to the second node N2, its third end is connected to the first transmit port 61 of the NFC chip 60, and its fourth end is connected to the second transmit port 62. The filter circuit 73 is mainly used to filter out out-of-band noise and spurious signals, allowing only signals in the operating frequency band (such as 13.56 MHz) to pass through, thereby improving the purity of the transmitted signal and enhancing anti-interference capability.

[0068] The first end of the first receiving branch 74 is electrically connected to the first node N1, and the second end of the first receiving branch 74 is electrically connected to the first receiving port 63. The first end of the second receiving branch 75 is electrically connected to the second node N2, and the second end of the second receiving branch 75 is electrically connected to the second receiving port 64.

[0069] In this embodiment, one end of the first receiving branch 74 is connected to the first node N1, and the other end is connected to the first receiving port 63 of the NFC chip 60. One end of the second receiving branch 75 is connected to the second node N2, and the other end is connected to the second receiving port 64. The two receiving branches are used to transmit the signals received by the antenna to the NFC chip for decoding.

[0070] The antenna front-end circuit 70 integrates a matching circuit 71, an antenna interface circuit 72, a filtering circuit 73, a first receiving branch 74, and a second receiving branch 75. It can achieve the coordinated design of impedance matching, signal filtering, and receiving path, improve the transmission efficiency and receiving sensitivity of radio frequency signals, and enhance the stability and anti-interference capability of NFC communication.

[0071] Figure 5 This is a circuit structure of an antenna front-end circuit shown according to an exemplary embodiment of the present disclosure. Figure 2 .like Figure 5 As shown, the matching circuit 71 includes a first matching branch 711 and a second matching branch 712.

[0072] The first matching branch 711 includes a first capacitor C1, a second capacitor C2 and a first resistor R1. The first capacitor C1 and the first resistor R1 are connected in series between the first terminal and the third terminal of the matching circuit 71. One end of the second capacitor C2 is electrically connected between the first capacitor C1 and the first resistor R1, and the other end of the second capacitor C2 is grounded.

[0073] In this embodiment, the first matching branch 711 is connected between the first end of the matching circuit 71 and the third end of the matching circuit 71. The first end of the matching circuit 71 is electrically connected to the first antenna connection end 311. That is, the first matching branch 711 is connected to the first antenna connection end 311 of the NFC antenna 30, and forms a π-type matching network through the first capacitor C1, the second capacitor C2 and the first resistor R1.

[0074] In transmit mode, the first matching branch 711 efficiently transmits the radio frequency signal from the first transmit port 61 of the NFC chip 60 to the first antenna connection terminal 311 of the NFC antenna 30 after matching and adjustment, ensuring that the signal is radiated out with minimal energy loss. In receive mode, after the external sensing signal is input through the first antenna connection terminal 311 of the NFC antenna 30, the first matching branch 711 also achieves impedance matching and signal optimization, so that the signal is efficiently transmitted to the first receive port 63 of the NFC chip 60.

[0075] The second matching branch 712 includes a third capacitor C3, a fourth capacitor C4, and a second resistor R2. The third capacitor C3 and the second resistor R2 are connected in series between the second terminal and the fourth terminal of the matching circuit 71. One end of the fourth capacitor C4 is electrically connected between the third capacitor C3 and the second resistor R2, and the other end of the fourth capacitor C4 is grounded.

[0076] In this embodiment, the second matching branch 712 is connected between the second terminal and the fourth terminal of the matching circuit 71. The second terminal of the matching circuit 71 is electrically connected to the second antenna connection terminal 312. That is, the second matching branch 712 is connected to the second antenna connection terminal 312 of the NFC antenna 30, and forms a π-type matching network through the third capacitor C3, the fourth capacitor C4 and the second resistor R2.

[0077] In transmit mode, the second matching branch 712 efficiently transmits the radio frequency signal from the second transmit port 62 of the NFC chip 60 to the second antenna connection terminal 312 of the NFC antenna 30 after matching and adjustment, ensuring that the signal is radiated out with minimal energy loss. In receive mode, after the external sensing signal is input through the second antenna connection terminal 312 of the NFC antenna 30, the second matching branch 712 also achieves impedance matching and signal optimization, so that the signal is efficiently transmitted to the second receive port 64 of the NFC chip 60.

[0078] In some embodiments of this disclosure, the first capacitor C1, the second capacitor C2, the third capacitor C3, and the fourth capacitor C4 are each composed of one or more capacitor elements connected in parallel.

[0079] like Figure 5 As shown, the first capacitor C1, the second capacitor C2, the third capacitor C3, and the fourth capacitor C4 are all composed of two capacitor elements connected in parallel. By connecting multiple capacitors in parallel, it is convenient to accurately adjust the equivalent capacitance value to meet impedance matching requirements.

[0080] In this embodiment, the matching circuit 71 includes a first matching branch 711 and a second matching branch 712, employing a symmetrical π-type structure. Combined with a tunable capacitor array design, it can achieve high-precision impedance matching in the operating frequency band (e.g., 13.56 MHz), improving the power transmission efficiency and signal integrity of the NFC antenna 30. Simultaneously, grounding the second capacitor C2 and the fourth capacitor C4 helps filter out common-mode noise, enhances anti-interference capabilities, and ensures stable operation of NFC in complex electromagnetic environments.

[0081] In some embodiments of this disclosure, such as Figure 5 As shown, the filter circuit 73 includes a first filter branch 731 and a second filter branch 732.

[0082] The first filter branch 731 includes a first inductor L1 and a fifth capacitor C5. The first inductor L1 is electrically connected between the first terminal and the third terminal of the filter circuit 73. One end of the fifth capacitor C5 is electrically connected between the first inductor L1 and the first node N1, and the other end of the fifth capacitor C5 is grounded.

[0083] In this embodiment, the first filter branch 731 consists of a first inductor L1 and a fifth capacitor C5, forming an LC filter structure. The first inductor L1 is connected between the first terminal (connected to the first node N1) and the third terminal (connected to the first transmit port 61 of the NFC chip 60) of the filter circuit 73, serving to block high-frequency interference and allow signals in the operating frequency band (e.g., 13.56 MHz) to pass through. One end of the fifth capacitor C5 is connected to the node between the first inductor L1 and the first node N1, and the other end is grounded, used to bypass high-frequency noise to ground and prevent it from entering the NFC chip 60.

[0084] like Figure 5 As shown, the first filtering branch 731 is connected between the first matching branch 711 and the first transmitting port 61 of the NFC chip 60. In transmitting mode, the radio frequency signal output by the NFC chip 60 through the first transmitting port 61 passes through the first filtering branch 731, effectively filtering out harmonic components and out-of-band spurious emissions in the signal. Then, the filtered signal enters the first matching branch 711, is matched and adjusted, and is then efficiently transmitted to the first antenna connection terminal 311 of the NFC antenna 30, ensuring that the signal is radiated out with minimal energy loss.

[0085] The second filter branch 732 includes a second inductor L2 and a sixth capacitor C6. The second inductor L2 is electrically connected between the second terminal and the fourth terminal of the filter circuit 73. One end of the sixth capacitor C6 is electrically connected between the second inductor L2 and the second node N2, and the other end of the sixth capacitor C6 is grounded.

[0086] In this embodiment, the second filter branch 732 is composed of a second inductor L2 and a sixth capacitor C6, forming an LC filter structure. The second inductor L2 is connected between the second terminal (connected to the second node N2) and the fourth terminal (connected to the second transmit port 62 of the NFC chip 60) of the filter circuit 73, serving to block high-frequency interference and allow signals in the operating frequency band (e.g., 13.56 MHz) to pass through. One end of the sixth capacitor C6 is connected to the node between the second inductor L2 and the second node N2, and the other end is grounded to bypass high-frequency noise to ground and prevent it from entering the NFC chip 60.

[0087] like Figure 5 As shown, the second filtering branch 732 is connected between the second matching branch 712 and the second transmit port 62 of the NFC chip 60. In transmit mode, the radio frequency signal output by the NFC chip 60 through the second transmit port 62 passes through the second filtering branch 732, effectively filtering out harmonic components and out-of-band spurious emissions in the signal. Then, the filtered signal enters the second matching branch 712, is matched and adjusted, and is then efficiently transmitted to the second antenna connection terminal 312 of the NFC antenna 30, ensuring that the signal is radiated out with minimal energy loss.

[0088] In some embodiments of this disclosure, the fifth capacitor C5 and the sixth capacitor C6 are both composed of one or more capacitor elements connected in parallel.

[0089] like Figure 5 As shown, both the fifth capacitor C5 and the sixth capacitor C6 are composed of two capacitor elements connected in parallel. By connecting multiple capacitor elements in parallel, the equivalent capacitance value can be flexibly adjusted, thereby improving high-frequency filtering performance and circuit reliability.

[0090] In this embodiment of the present disclosure, the filter circuit 73 includes a first filter branch 731 and a second filter branch 732 arranged symmetrically, which correspond to the dual-port transmission path of the NFC antenna respectively. The two filter branches respectively form an LC filter structure, which effectively suppresses out-of-band noise and harmonic interference. In the transmission mode, it can filter out spurious components in the output signal of the NFC chip and improve the purity of the radio frequency signal.

[0091] In some embodiments of this disclosure, such as Figure 5 As shown, the antenna interface circuit 72 includes a seventh capacitor C7, which is electrically connected between the first terminal and the second terminal of the antenna interface circuit 72.

[0092] In this embodiment of the disclosure, the first end of the antenna interface circuit 72 is electrically connected to the first antenna connection end 311, and the second end of the antenna interface circuit 72 is electrically connected to the second antenna connection end 312. The seventh capacitor C7 is connected between the first end and the second end of the antenna interface circuit 72 to isolate the DC component and ensure the signal integrity between the NFC antenna 30 and the subsequent circuits.

[0093] In some embodiments of this disclosure, such as Figure 5 As shown, the first receiving branch 74 includes a third resistor R3 and an eighth capacitor C8, which are connected in series between the first terminal and the second terminal of the first receiving circuit 74. The second receiving branch 75 includes a fourth resistor R4 and a ninth capacitor C9, which are connected in series between the first terminal and the second terminal of the second receiving circuit 75.

[0094] In this embodiment of the disclosure, the first receiving branch 74 is composed of a third resistor R3 and an eighth capacitor C8, and is used to process the radio frequency signal received from the first antenna connection terminal 311 of the NFC antenna 30 and transmit it to the first receiving port 63 of the NFC chip 60.

[0095] like Figure 5As shown, the first receiving branch 74 is connected between the first matching branch 711 and the first receiving port 63 of the NFC chip 60. In receiving mode, the NFC antenna 30 senses an external radio frequency signal through the first antenna connection terminal 311. This signal undergoes impedance matching through the first matching branch 711. After matching adjustment, the signal enters the first receiving branch 74 for further signal shaping and matching to meet the input requirements of the NFC chip 60. Finally, the processed signal is transmitted to the first receiving port 63 of the NFC chip 60 for decoding and data processing.

[0096] In this embodiment of the disclosure, the second receiving branch 75 is composed of a fourth resistor R4 and a ninth capacitor C9, and is used to process the radio frequency signal received from the second antenna connection terminal 312 of the NFC antenna 30 and transmit it to the second receiving port 64 of the NFC chip 60.

[0097] like Figure 5 As shown, the second receiving branch 75 is connected between the second matching branch 712 and the second receiving port 64 of the NFC chip 60. In receiving mode, the NFC antenna 30 senses an external radio frequency signal through the second antenna connection terminal 312. This signal undergoes impedance matching through the second matching branch 712. After matching adjustment, the signal enters the second receiving branch 75 for further signal shaping and matching to meet the input requirements of the NFC chip 60. Finally, the processed signal is transmitted to the second receiving port 64 of the NFC chip 60 for decoding and data processing.

[0098] In this embodiment, the first receiving branch 74 is connected between the first matching branch 711 and the first receiving port 63 of the NFC chip 60, ensuring that the radio frequency signal received from the first antenna connection terminal 311 can be transmitted to the first receiving port 63 of the NFC chip 60 for decoding; and the second receiving branch 75 is connected between the second matching branch 712 and the second receiving port 64 of the NFC chip 60, ensuring that the radio frequency signal received from the second antenna connection terminal 312 can be transmitted to the second receiving port 64 of the NFC chip 60 for decoding. This symmetrical dual-path receiving structure not only enhances common-mode rejection capability and anti-interference performance, but also improves the receiving sensitivity and stability of NFC communication, thereby ensuring reliable data interaction in complex electromagnetic environments.

[0099] The electronic device provided in this disclosure makes full use of the space around the camera decorative piece 20 by arranging the NFC antenna 30 around the frame of the camera decorative piece 20 and attaching it to its surface. It uses a frame antenna instead of the ferrite antenna in the related technology, which solves the problems of large area occupation and high cost of ferrite antenna in the related technology. It improves the flexibility of antenna layout and space utilization, and can avoid the user's hand holding area, reducing the impact of hand obstruction on NFC performance, thereby improving the user experience of NFC function in mobile payment, card swiping and other scenarios. In addition, the metal part 40 in the area surrounded by the NFC antenna 30 forms electromagnetic coupling with the NFC antenna 30 through the gap, which can adjust the radiation performance of the antenna and further improve the communication stability and sensing efficiency of the antenna.

[0100] The electronic device also includes an NFC chip 60 and an antenna front-end circuit 70. In transmit mode, the NFC chip 60 generates and processes radio frequency (RF) signals and transmits them to the antenna front-end circuit 70 through its first transmit port 61 and second transmit port 62. The antenna front-end circuit 70 then transmits the signals to the first antenna connection terminal 311 and the second antenna connection terminal 312 of the NFC antenna 30, ensuring effective transmission of signals in the operating frequency band while maximizing energy transfer efficiency and reducing reflection loss. In receive mode, when the NFC antenna 30 receives an RF signal, the RF signal is input to the antenna front-end circuit 70 through the first antenna connection terminal 311 and the second antenna connection terminal 312, and then transmitted to the first receive port 63 and the second receive port 64 of the NFC chip 60 for processing, thereby completing signal reception.

[0101] Furthermore, the antenna front-end circuit 70 integrates a matching circuit 71, an antenna interface circuit 72, a filtering circuit 73, a first receiving branch 74, and a second receiving branch 75, which enables the coordinated design of impedance matching, signal filtering, and receiving path, improving the transmission efficiency and receiving sensitivity of radio frequency signals, and enhancing the stability and anti-interference capability of NFC communication.

[0102] It should be noted that the electronic device in this embodiment can be a foldable electronic device or a flat-screen electronic device (non-foldable electronic device), and the NFC antenna is a frame antenna set around the camera decorative piece.

[0103] In practical applications, the position of the camera decorative parts can be flexibly adjusted according to factors such as the specific shape, size, internal structure and antenna performance requirements of the electronic device. This disclosure does not limit this.

[0104] Figure 6 This is a block diagram illustrating an electronic device according to an exemplary embodiment of the present disclosure. (Refer to...) Figure 6The electronic device 600 may also include one or more of the following components: a processing component 602, a memory 604, a power supply component 606, a multimedia component 608, an audio component 610, an input / output (I / O) interface 612, a sensor component 614, and a communication component 616.

[0105] Processing component 602 typically controls the overall operation of electronic device 600, such as operations associated with display, telephone calls, data communication, camera operation, and recording operations. Processing component 602 may include one or more processors 620 to execute instructions to perform all or part of the steps of the methods described above. Furthermore, processing component 602 may include one or more modules to facilitate interaction between processing component 602 and other components. For example, processing component 602 may include a multimedia module to facilitate interaction between multimedia component 608 and processing component 602.

[0106] Memory 604 is configured to store various types of data to support the operation of device 600. Examples of this data include instructions for any application or method operating on electronic device 600, contact data, phonebook data, messages, pictures, videos, etc. Memory 604 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0107] Power supply component 606 provides power to various components of electronic device 600. Power supply component 606 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to electronic device 600.

[0108] Multimedia component 608 includes a screen that provides an output interface between the electronic device 600 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touchscreen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors may sense not only the boundaries of the touch or swipe action but also the duration and pressure associated with the touch or swipe operation. In some embodiments, multimedia component 608 includes a front-facing camera and / or a rear-facing camera. When the device 600 is in an operating mode, such as a shooting mode or a video mode, the front-facing camera and / or the rear-facing camera may receive external multimedia data. Each front-facing camera and rear-facing camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0109] Audio component 610 is configured to output and / or input audio signals. For example, audio component 610 includes a microphone (MIC) configured to receive external audio signals when electronic device 600 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio signals may be further stored in memory 604 or transmitted via communication component 616. In some embodiments, audio component 610 also includes a speaker for outputting audio signals.

[0110] I / O interface 612 provides an interface between processing component 602 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to, home buttons, volume buttons, power buttons, and lock buttons.

[0111] Sensor assembly 614 includes one or more sensors for providing status assessments of various aspects of electronic device 600. For example, sensor assembly 614 may detect the on / off state of device 600, the relative positioning of components such as the display and keypad of electronic device 600, changes in position of electronic device 600 or a component of electronic device 600, the presence or absence of user contact with electronic device 600, orientation or acceleration / deceleration of electronic device 600, and temperature changes of electronic device 600. Sensor assembly 614 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. Sensor assembly 614 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, sensor assembly 614 may also include an accelerometer, gyroscope, magnetometer, pressure sensor, or temperature sensor.

[0112] Communication component 616 is configured to facilitate wired or wireless communication between electronic device 600 and other devices. Electronic device 600 can access wireless networks based on communication standards, such as WiFi, 3G, 4G, 5G, other communication standards, or combinations thereof. In some embodiments of this disclosure, communication component 616 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In some embodiments of this disclosure, communication component 616 further includes a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0113] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

[0114] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. An electronic device, characterized in that, The electronic device includes: Back cover; A camera decorative element, which is mounted on the rear cover; A near-field communication antenna is provided, which is arranged around the frame of the camera decorative piece and attached to the surface of the frame of the camera decorative piece. A metal component is disposed within the area enclosed by the near-field communication antenna, and a gap is provided between the metal component and the near-field communication antenna; The metal component is electromagnetically coupled to the near-field communication antenna through the gap to adjust the radiation performance of the near-field communication antenna.

2. The electronic device according to claim 1, characterized in that, The metal part has one or more through holes; the one or more through holes are correspondingly arranged with respect to the camera assembly and are used to avoid the camera assembly.

3. The electronic device according to claim 1, characterized in that, The width of the gap ranges from 1.5mm to 2.5mm.

4. The electronic device according to any one of claims 1 to 3, characterized in that, The near-field communication antenna has an opening, with a first antenna connection terminal at the first end of the opening and a second antenna connection terminal at the second end of the opening.

5. The electronic device according to claim 4, characterized in that, The electronic device also includes a near-field communication chip and an antenna front-end circuit. The near-field communication chip includes a first transmitting port, a second transmitting port, a first receiving port, and a second receiving port. The antenna front-end circuit is electrically connected to the first antenna connection terminal, the second antenna connection terminal, the first transmitting port, the second transmitting port, the first receiving port, and the second receiving port, respectively.

6. The electronic device according to claim 5, characterized in that, The antenna front-end circuit includes a matching circuit; the matching circuit is used to achieve impedance matching between the near-field communication chip and the near-field communication antenna.

7. The electronic device according to claim 6, characterized in that, The matching circuit includes a first matching branch and a second matching branch; The first matching branch includes a first capacitor, a second capacitor, and a first resistor. The first capacitor and the first resistor are connected in series between the first terminal and the third terminal of the matching circuit. One end of the second capacitor is electrically connected between the first capacitor and the first resistor, and the other end of the second capacitor is grounded. The second matching branch includes a third capacitor, a fourth capacitor, and a second resistor. The third capacitor and the second resistor are connected in series between the second terminal and the fourth terminal of the matching circuit. One end of the fourth capacitor is electrically connected between the third capacitor and the second resistor, and the other end of the fourth capacitor is grounded.

8. The electronic device according to claim 7, characterized in that, The first capacitor, the second capacitor, the third capacitor, and the fourth capacitor are all composed of one or more capacitor elements connected in parallel.

9. The electronic device according to claim 6, characterized in that, The antenna front-end circuit also includes an antenna interface circuit, a filter circuit, a first receiving branch, and a second receiving branch. The first terminal of the antenna interface circuit is electrically connected to the first antenna connection terminal, the second terminal of the antenna interface circuit is electrically connected to the second antenna connection terminal, the third terminal of the antenna interface circuit is electrically connected to the first terminal of the matching circuit, and the fourth terminal of the antenna interface circuit is electrically connected to the second terminal of the matching circuit. The third terminal of the matching circuit is electrically connected to the first node, and the fourth terminal of the matching circuit is electrically connected to the second node. The first terminal of the filter circuit is electrically connected to the first node, the second terminal of the filter circuit is electrically connected to the second node, the third terminal of the filter circuit is electrically connected to the first transmitting port, and the fourth terminal of the filter circuit is electrically connected to the second transmitting port. The first end of the first receiving branch is electrically connected to the first node, and the second end of the first receiving branch is electrically connected to the first receiving port; the first end of the second receiving branch is electrically connected to the second node, and the second end of the second receiving branch is electrically connected to the second receiving port.

10. The electronic device according to claim 9, characterized in that, The filtering circuit includes a first filtering branch and a second filtering branch; The first filter branch includes a first inductor and a fifth capacitor. The first inductor is electrically connected between the first terminal and the third terminal of the filter circuit. One end of the fifth capacitor is electrically connected between the first inductor and the first node, and the other end of the fifth capacitor is grounded. The second filter branch includes a second inductor and a sixth capacitor. The second inductor is electrically connected between the second terminal and the fourth terminal of the filter circuit. One end of the sixth capacitor is electrically connected between the second inductor and the second node, and the other end of the sixth capacitor is grounded.

11. The electronic device according to claim 10, characterized in that, Both the fifth capacitor and the sixth capacitor are composed of one or more capacitor elements connected in parallel.

12. The electronic device according to claim 9, characterized in that, The antenna interface circuit includes a seventh capacitor, which is electrically connected between the first terminal and the second terminal of the antenna interface circuit.

13. The electronic device according to claim 9, characterized in that, The first receiving branch includes a third resistor and an eighth capacitor, wherein the third resistor and the eighth capacitor are connected in series between the first terminal of the first receiving circuit and the second terminal of the first receiving circuit; The second receiving branch includes a fourth resistor and a ninth capacitor, which are connected in series between the first terminal and the second terminal of the second receiving circuit.

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