NFC-based antenna and mobile device

Abstract

The utility model discloses an NFC-based antenna and a mobile device, and the antenna comprises an NFC coil unit and a honeycomb diversity antenna unit, the honeycomb diversity antenna unit and the NFC coil unit are arranged in a mutual winding manner, the honeycomb diversity antenna unit comprises a first ground elastic sheet, and the first ground elastic sheet of the honeycomb diversity antenna unit is electrically connected with the NFC coil unit through PCB wiring. Therefore, the bandwidth of the NFC coil unit is increased. The cellular diversity antenna is combined with the NFC coil through the PCB wiring, which is equivalent to that the area of the NFC induction coil is added to and extends to the top and the side edge of the mobile phone, so that the function of multi-surface card swiping is realized, and the convenience of using the NFC function of the mobile equipment is effectively improved.

Description

Technical Field

[0001] This application relates to the technical field of mobile devices, and particularly to an NFC-based antenna and a mobile device. Background Art

[0002] With the development of communication technologies, the NFC function has penetrated all aspects of life. The traditional NFC design that only supports card swiping on the bottom surface can no longer meet the daily needs of people. On this basis, the function of multi-sided card swiping for NFC has been developed. This function extends the NFC antenna to the top antenna of the mobile phone and integrates it with our conventional diversity antenna. This increases the difficulty of debugging the diversity antenna. In response to this problem, we have conducted in-depth research and made optimizations.

[0003] Currently, our NFC antenna is connected to the diversity antenna through board traces, enabling the diversity antenna to be part of the NFC antenna to achieve the multi-sided card swiping function. This is equivalent to adding a stub to the diversity antenna itself, which has a significant impact on our frequency and efficiency. With the development of the information age, people have higher and higher requirements for electronic products. To meet the needs of market customers, the solution of multi-sided card swiping for NFC has emerged. However, this solution undoubtedly further increases the difficulty of antenna debugging in the deteriorating antenna environment.

[0004] With the continuous progress of technology, NFC-based antennas are also constantly evolving and innovating. For example, some companies are researching how to improve the performance of NFC antennas by optimizing antenna designs and enhancing matching efficiency. In addition, there are patent applications for new technologies such as NFC antenna components, aiming to solve serious problems such as limited NFC antenna functions and degraded performance in the prior art. Summary of the Utility Model

[0005] This application discloses an NFC-based antenna and a mobile device. By combining the cellular diversity antenna with the NFC coil through PCB traces, the area of the NFC induction coil can be increased and extended to the top and side positions of the mobile phone, thereby realizing the multi-sided card swiping function of the mobile device.

[0006] To achieve the above objective, this application discloses an NFC-based antenna, comprising:

[0007] NFC coil unit;

[0008] Cellular diversity antenna unit, the cellular diversity antenna unit is connected to the NFC coil unit, the cellular diversity antenna unit includes a first ground spring, and the cellular diversity antenna unit is electrically connected to the NFC coil unit through PCB traces.

[0009] In a first possible implementation manner, the cellular diversity antenna unit further includes: an antenna main board; a second ground spring piece disposed on the antenna main board, and the second ground spring piece is connected to the NFC coil unit through a PCB trace; a feeding spring piece disposed on the antenna main board, and the feeding spring piece is disposed between the second ground spring piece and the first ground spring piece; wherein, the second ground spring piece, the feeding spring piece and the first ground spring piece are electrically connected to increase the induction ability of the cellular diversity antenna unit.

[0010] In a first possible implementation manner, the antenna main board is provided with a through groove, wherein the first ground spring piece is disposed at the notch of the through groove.

[0011] In a first possible implementation manner, the second ground spring piece and the feeding spring piece are disposed adjacent to the bottom of the through groove.

[0012] In a first possible implementation manner, the NFC-based antenna further includes: an NFC main board, one end of the NFC main board is connected to the NFC coil unit through a TX1 line, the other end of the NFC main board is connected to the first ground spring piece through a TX2 line, and the NFC main board is used to control the NFC coil unit and the cellular diversity antenna unit.

[0013] This application also discloses a mobile device, including an NFC-based antenna, and the NFC-based antenna is the above-mentioned NFC-based antenna.

[0014] In a second possible implementation manner, the NFC coil unit is disposed at the top of the mobile device.

[0015] In a second possible implementation manner, the cellular diversity antenna unit is disposed at the top of the mobile device, and / or, the cellular diversity antenna unit is disposed on both sides of the mobile device.

[0016] In a second possible implementation manner, the mobile device includes: a housing having an accommodation cavity; a control main board disposed in the accommodation cavity, and the control main board is used to control the mobile device.

[0017] In a second possible implementation manner, a plurality of wiring grooves are provided on the control main board, and the plurality of wiring grooves are used to place the PCB traces of the NFC-based antenna.

[0018] Compared with the prior art, the beneficial effects of this application are as follows:

[0019] In the present application, the cellular diversity antenna unit and the NFC coil unit are arranged to be wound around each other. The cellular diversity antenna unit includes a first ground spring piece. The first ground spring piece of the cellular diversity antenna unit is electrically connected to the NFC coil unit through PCB traces, which is used to increase the area for radiating NFC signals. By combining the diversity antenna of the cellular phone with the NFC coil through PCB traces, it is equivalent to adding the area of the NFC induction coil and extending it to the top and side positions of the mobile phone, thereby realizing the function of swiping cards on multiple sides. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 Schematic structural diagram of an embodiment of an antenna based on NFC provided by an embodiment of the present utility model;

[0022] Figure 2 Schematic structural diagram of a first embodiment of a cellular diversity antenna unit provided by an embodiment of the present utility model;

[0023] Figure 3 Schematic structural diagram of a second embodiment of a cellular diversity antenna unit provided by an embodiment of the present utility model;

[0024] Figure 4 Schematic structural diagram of the antenna main board of the cellular diversity antenna unit in the prior art;

[0025] Figure 5 Schematic structural diagram of NFC in the prior art.

[0026] Description of the Reference Numerals:

[0027] 10 - NFC coil unit;

[0028] 20 - Cellular diversity antenna unit; 200 - Antenna main board; 21 - First ground spring piece; 22 - Second ground spring piece; 23 - Feeding spring piece; 25 - Through slot;

[0029] 30 - PCB trace; 31 - NFC main board; 32 - TX2 line; 33 - TX1 line. Detailed Embodiments

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0031] In the present application, the terms "installed", "set", "provided with", "connected", and "linked" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there can be internal communication between two devices, components, or parts. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0032] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, components, or parts (the specific types and structures may be the same or different), and do not indicate or imply the relative importance and quantity of the indicated devices, components, or parts. Unless otherwise specified, the meaning of "a plurality" is two or more.

[0033] The NFC function of a mobile device refers to the integration and evolution of non-contact radio frequency identification (RFID) and interoperability technology. It combines the functions of an inductive card reader, an inductive card, and peer-to-peer on a single chip, enabling the mobile terminal to identify and exchange data with compatible devices within a short distance. NFC has characteristics such as short distance, high bandwidth, and low power consumption. It is suitable for the transmission of some sensitive information or personal data and has advantages in terms of security. NFC is compatible with existing non-contact smart card technologies and has become an official standard supported by more and more major manufacturers. By using the NFC function, various applications such as consumption and access control can be realized, replacing multiple cards in a card wallet, such as mobile payment, electronic ticketing, access control, mobile identity recognition, anti-counterfeiting, etc. However, the existing NFC function of mobile devices can only be located at a single position on the top of the mobile device. With the development of the current information era, people's requirements for electronic products are getting higher and higher. To meet the needs of market customers, the solution of multi-sided NFC card swiping has emerged. However, this solution undoubtedly further increases the difficulty of antenna debugging in the deteriorating antenna environment.

[0034] In view of this, some embodiments of the present application provide an NFC-based antenna. In existing mobile devices, a cellular diversity antenna and an NFC coil are usually provided, but there is no interaction between them. Now, by combining the cellular diversity antenna with the NFC coil through PCB traces, it is equivalent to adding and extending the area of the NFC induction coil to the top and side positions of the mobile phone, thereby enabling the mobile device to achieve the function of multi-sided card swiping.

[0035] The present application will be described in detail through specific embodiments as follows:

[0036] An NFC-based antenna according to an embodiment of the present application, as Figure 1 、 Figure 2 and Figure 5 shown, the NFC-based antenna includes: an NFC coil unit 10; a cellular diversity antenna unit 20, the cellular diversity antenna unit 20 is connected to the NFC coil unit 10, the cellular diversity antenna unit 20 includes a first ground spring 21, and the cellular diversity antenna unit 20 is electrically connected to the NFC coil unit 10 through a PCB trace 30.

[0037] For the NFC-based antenna provided by the embodiment of the present application, the cellular diversity antenna unit 20 and the NFC coil unit 10 are connected to each other. The cellular diversity antenna unit 20 includes a first ground spring 21, and the cellular diversity antenna unit 20 is electrically connected to the NFC coil unit 10 through a PCB trace 30, which is used to increase the area of the radiated NFC signal. By combining the cellular diversity antenna unit 20 with the NFC coil unit 10 through a PCB trace 30, it is equivalent to adding and extending the area of the NFC induction coil to the top and side positions of the mobile phone, thereby achieving the function of multi-sided card swiping.

[0038] It should be noted here that the NFC coil unit 10 refers to a key component in NFC (Near Field Communication) technology, which is mainly used to achieve short-range wireless communication and data transmission. The NFC coil unit 10 usually includes an antenna and related electronic components for receiving and transmitting wireless signals. It has functions such as mobile payment: through NFC technology, users can easily achieve functions such as mobile phone payment and bus card top-up. Access control system: The NFC access card can communicate with the access control system through the NFC coil unit to achieve contactless door opening. Smart tag: The NFC tag can communicate with NFC devices such as smartphones and is used for information transmission, item tracking, etc. Smart home: NFC technology can be used to control smart home devices, such as controlling lights, air conditioners, etc. through NFC cards or mobile phones. The cellular diversity antenna unit 20 refers to an antenna technology adopted in a cellular communication system. However, in order to overcome adverse factors such as multipath effects and shadow effects and improve signal reception quality and system performance, multiple antenna units are combined together, and the differences in space, frequency, or polarization between them are effectively utilized to achieve diversity reception and combining processing of signals, thereby improving the reliability and stability of signals.

[0039] Specifically, the cellular diversity antenna unit 20 further includes: an antenna main board 200; a second ground spring 22, the second ground spring 22 is disposed on the antenna main board 200; a feeding spring 23, the feeding spring 23 is disposed on the antenna main board 200, and the feeding spring 23 is disposed between the second ground spring 22 and the first ground spring 21; wherein, the second ground spring 22, the feeding spring 23 and the first ground spring 21 are electrically connected to increase the induction ability of the cellular diversity antenna unit 20.

[0040] In this embodiment, the cellular diversity antenna unit 20 further includes: an antenna main board 200, a second ground spring 22 and a feeding spring 23. Such a setting ensures that the cellular diversity antenna unit 20 can be stably connected to the NFC coil unit while effectively improving the signal coverage range and reception quality of the cellular diversity antenna unit 20, reducing signal blind spots and interference, and effectively enhancing the user experience and system performance.

[0041] It should be noted here that in the smart wearable device, the design of the feeding point and the grounding point of the feeding elastic sheet 23 is crucial for optimizing the antenna performance. The feeding elastic sheet 23 can help form an efficient antenna system by coupling with the metal frame or other metal structures. However, the antenna device in a smartphone also relies on the feeding elastic sheet to improve the signal quality and reduce radiation spurs. Such a setting effectively ensures the signal quality of the cellular diversity antenna unit 20 and can also effectively reduce radiation spurs. However, the antenna main board 200 can also be divided into the antenna design integrated on the main board and the main board technology or application related to the antenna. In some devices, such as smartphones, tablets or wireless routers, etc., the antenna can be directly integrated on the main board. This design method helps to save space for mobile devices, effectively improve the signal transmission efficiency, and can also reduce the use of external antennas. The materials used on the antenna main board 200 are also equally important, such as liquid crystal polymer (LCP), etc. These materials have excellent electrical properties and are suitable for high-frequency communication. In this application, the materials and the main board shape used for the antenna main board 200 are not limited, and appropriate materials and main board shapes can be selected according to the actual situation.

[0042] Furthermore, the antenna main board 200 is provided with a through slot 25, wherein, the first ground elastic sheet 21 is arranged at the notch of the through slot 25.

[0043] In this embodiment, as Figure 3 , Figure 4 shown, the antenna main board 200 is provided with a through slot 25, wherein, the first ground elastic sheet 21 is arranged at the notch of the through slot 25. On the premise of the NFC multi-sided card swiping requirement, a new design scheme for the cellular antenna opens a slot at the position of the newly added elastic sheet of the NFC, changing the current mode of the intermediate frequency, so that a resonance is generated at the intermediate frequency position, thereby making up for the problem of insufficient bandwidth and poor efficiency. The original intermediate frequency is generated in the balanced mode, and the currents cancel each other out, so the waveform cannot be excited, and there is only one resonance. After slotting, the original current direction will be changed, and a new intermediate frequency resonance will be excited, thereby improving the bandwidth and efficiency of MHB (1700 - 2200 MHz).

[0044] Furthermore, the NFC-based antenna further includes: an NFC main board 31. One end of the NFC main board 31 is connected to the NFC coil unit 10 through a TX1 line 33, and the other end of the NFC main board 31 is connected to the first ground elastic sheet 21 through a TX2 line 32. The NFC main board 31 is used to control the NFC coil unit 10 and the cellular diversity antenna unit 20.

[0045] In this embodiment, one end of the NFC main board 31 is connected to the NFC coil unit 10 through the TX1 line 33, and the other end of the NFC main board 31 is connected to the first ground spring piece 21 through the TX2 line 32. The NFC main board 31 is used to control the NFC coil unit 10 and the cellular diversity antenna unit 20. Here, it should be noted that the TX1 line 33 usually refers to a connecting wire used in electronic devices, such as connectors, flexible cables, etc. Such wires are widely used in various electronic devices for internal or external connection purposes. It has a TDK original magnetic ring and the function of anti-interference. The TX2 line 32 can be a connection wire or interface related to NVIDIA Jetson TX2. However, the NFC main board 31 is an NFC chip. The NFC (Near Field Communication) chip is a short-range high-frequency wireless communication technology chip, which allows two devices to perform near-field communication without contact. NFC chips are usually integrated in devices such as smartphones, payment cards, and smart tags, and can achieve simple and secure data transmission. Based on radio frequency identification (RFID) technology, the operating frequency is usually 13.56 megahertz. According to the differences in its functions and characteristics, NFC chips can be divided into various types, such as NFC tag chips, NFC reader / writer chips, NFC controller chips, NFC payment chips, and NFC security element chips, etc. These different types of NFC chips play important roles in different applications. Here, the type of NFC chip is not limited, and it can be selected according to the actual situation.

[0046] In another embodiment of the present application, a mobile device is further provided. The mobile device includes an NFC-based antenna, and the NFC-based antenna is the NFC-based antenna in the above embodiment. The mobile device has the NFC function. NFC is the near-field wireless communication technology, which can realize short-range wireless communication between devices and is often used for functions such as mobile payment, access card simulation, and bus card recharge. It greatly improves the convenience of the life of the mobile device user.

[0047] Specifically, the NFC coil unit 10 is arranged at the top of the mobile device. This setting ensures the stability of the NFC function of the mobile device.

[0048] In this embodiment, the mobile device has a display screen. The NFC coil unit 10 is arranged on the back of the display screen and close to the top of the display screen, so that it is convenient for the operator to use the NFC function when using the mobile device.

[0049] Furthermore, the cellular diversity antenna unit 20 is arranged at the top of the mobile device, and / or, the cellular diversity antenna unit 20 is arranged on both sides of the mobile device.

[0050] In this embodiment, the cellular diversity antenna unit 20 is disposed at the top of the mobile device, and / or the cellular diversity antenna unit 20 is disposed on both sides of the mobile device. Among them, the cellular diversity antenna unit 20 is also disposed on the back of the display screen and close to the top of the display screen. At the same time, the cellular diversity antenna unit 20 is also disposed at both sides of the end of the display. This ensures the area of the induction coil of the entire NFC-based antenna. Since the NFC antenna is usually designed at a specific position inside the mobile phone, the selection of this position takes into account the overall electromagnetic compatibility and signal strength of the mobile phone. Setting the NFC antenna at the top of the mobile phone is to avoid interference from other electronic components and ensure the stability and reliability of the NFC signal. Secondly, the internal space of the mobile phone is limited, and the NFC antenna needs to coexist with the antennas of other wireless communication technologies (such as Bluetooth, Wi-Fi, etc.). Taking the top of the mobile phone as the position of the NFC antenna is to make better use of the space and reduce the mutual influence between different antennas. Finally, with the continuous development of technology, mobile device manufacturers pay more and more attention to the integration and optimization of various functions when designing mobile phones. Setting the NFC at the top may be to better cooperate with other functions (such as cameras, speakers, etc.) and improve the overall user experience.

[0051] Further, the mobile device includes: a housing having an accommodation cavity; and a control main board disposed in the accommodation cavity for controlling the mobile device.

[0052] In this embodiment, the mobile device includes a housing and a control main board. The housing is the protective shell of the mobile device to provide protection for the components of the mobile device. It can not only beautify the appearance of the mobile device, but also play a role in anti-falling, waterproofing and shockproofing. According to different usage scenarios and requirements, the housing can be made of ABS material with high fluidity and relatively low cost, or PC material with high strength but relatively high price and suitable for the housing with high strength requirements. The selection is based on the actual situation and is not limited in this application. The control main board, as the "brain" and "nerve center" of the mobile device, is responsible for connecting various components inside the mobile device, such as processors, memories, storage chips, sensors, cameras, etc., to form a complete system. These components achieve data transmission and sharing through the circuits and interfaces on the main board to ensure the normal operation of the mobile phone. The control main board integrates core components such as a central processing unit (CPU), a memory (RAM), and a storage (ROM / EMMC). These components cooperate together to complete various functions of the mobile device.

[0053] Further, an installation part is provided on the control main board. The NFC-based antenna is disposed on the installation part through a fixing member, and the NFC main board 31 of the NFC-based antenna is electrically connected to the control main board.

[0054] In this embodiment, an installation part is provided on the control main board. The NFC-based antenna is arranged on the installation part through a fixing part. The NFC main board 31 of the NFC-based antenna is electrically connected to the control main board. Such a setting ensures that the NFC-based antenna can be stably installed on the control main board, and the electrical connection between the NFC-based antenna and the control main board ensures the information transmission between the NFC-based antenna and the control main board.

[0055] It should be noted here that the NFC-based antenna can also be integrated on the control main board and be closely connected to the core components such as the processor and memory of the mobile device. This means that the NFC chip and its related circuits are directly embedded on the mobile phone main board to ensure the efficiency and stability of data transmission.

[0056] Furthermore, a plurality of wire grooves are provided on the control main board, and the plurality of wire grooves are used to place the PCB traces 30 of the NFC-based antenna.

[0057] In this embodiment, a plurality of wire grooves are provided on the control main board, and the plurality of wire grooves are used to place the PCB traces 30 of the NFC-based antenna. In order to ensure the space capacity of the mobile device, there is no extra space for the PCB traces 30. Therefore, the PCB traces 30 are arranged in the wire grooves, effectively improving the internal space of the mobile device. It should be noted here that the PCB traces 30 are a crucial part in the circuit board design, which directly affects the performance, stability and reliability of the circuit. However, the width of the PCB traces is directly related to the resistance and temperature rise when the current passes through. Under the same material conditions, the wider the line width, the smaller the resistance, and the less heat generated when the current passes through, which helps to maintain the stability and reliability of the circuit. On the contrary, too narrow a line width may lead to too large a resistance, excessive heat generated when the current passes through, and even cause circuit failures or burnout. In this application, the appropriate PCB traces 30 are selected according to the internal space of the mobile device, and no restrictions are made here.

[0058] Specifically, the depth of the plurality of wire grooves is greater than the diameter of the PCB traces 30.

[0059] In this embodiment, the depth of the wire groove is greater than the diameter of the PCB traces 30. Such a setting effectively ensures that the PCB traces 30 can be stably arranged in the wire grooves, effectively preventing the PCB traces 30 from detaching from the wire grooves when the mobile device moves, thus causing damage.

[0060] It should be noted here that the PCB routing groove, also known as the PCB slot or PCB card slot, is a groove-shaped structure used to fix, isolate and protect the wires on the PCB (Printed Circuit Board). They play a crucial role in the assembly and wiring process of electronic products, ensuring the stability and reliability of the circuit. PCB routing grooves can be divided into various types according to their shapes, sizes and uses, such as straight grooves, curved grooves, right-angle grooves, etc. This application does not make any restrictions and can be selected according to the actual situation. Common PCB routing groove materials include plastics (such as PVC, ABS, etc.), metals (such as aluminum alloy, stainless steel, etc.) and composite materials. However, when selecting a PCB routing groove, factors such as the size of the circuit board, wiring density, working environment and cost need to be considered. At the same time, it is also necessary to ensure the compatibility of the selected groove with the circuit board and the convenience of installation. These materials have different physical and chemical properties, and this application can select the appropriate PCB routing groove material according to specific requirements.

[0061] From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects:

[0062] By connecting the NFC coil unit 10 and the cellular diversity antenna unit 20 in the mobile device through the PCB trace 30, on the premise of meeting the need for multi-sided NFC card swiping, the performance of the intermediate frequency is further improved, making the customer experience better in actual use.

[0063] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present utility model.

Claims

1. An NFC-based antenna, characterized in that, Comprising: NFC coil unit (10); Cellular diversity antenna unit (20), the cellular diversity antenna unit (20) is connected to the NFC coil unit (10), the cellular diversity antenna unit (20) includes a first ground spring piece (21), and the cellular diversity antenna unit (20) is electrically connected to the NFC coil unit (10) through a PCB trace (30).

2. The NFC-based antenna according to claim 1, wherein The cellular diversity antenna unit (20) further includes: Antenna main board (200); Second ground spring piece (22), the second ground spring piece (22) is disposed on the antenna main board (200), and the second ground spring piece (22) is connected to the NFC coil unit (10) through the PCB trace (30); Feeding spring piece (23), the feeding spring piece (23) is disposed on the antenna main board (200), and the feeding spring piece (23) is disposed between the second ground spring piece (22) and the first ground spring piece (21).

3. The NFC-based antenna according to claim 2, wherein The antenna main board (200) is provided with a through groove (25), wherein the first ground spring piece (21) is disposed at the notch of the through groove (25).

4. The NFC-based antenna according to claim 3, wherein, The second ground spring piece (22) and the feeding spring piece (23) are disposed adjacent to the bottom of the through groove (25).

5. The NFC-based antenna according to claim 3, characterized in that, Further comprising: NFC main board (31), one end of the NFC main board (31) is connected to the NFC coil unit (10) through a TX1 line (33), the other end of the NFC main board (31) is connected to the first ground spring piece (21) through a TX2 line (32), and the NFC main board (31) is used to control the NFC coil unit (10) and the cellular diversity antenna unit (20).

6. A mobile device, comprising an NFC-based antenna, characterized in that, The NFC-based antenna is the NFC-based antenna according to any one of claims 1-5.

7. The mobile device according to claim 6, wherein The NFC coil unit (10) is disposed at the top end of the mobile device.

8. The mobile device according to claim 6, wherein The cellular diversity antenna unit (20) is disposed at the top end of the mobile device, and / or, the cellular diversity antenna unit (20) is disposed on both sides of the mobile device.

9. The mobile device according to claim 6, characterized in that, The mobile device includes: A housing having a receiving cavity; A control main board disposed in the receiving cavity, and the control main board is used to control the mobile device.

10. The mobile device according to claim 9, wherein A plurality of wiring grooves are provided on the control main board, and the plurality of wiring grooves are used to place the PCB trace (30) of the NFC-based antenna.

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