Antenna device and terminal

Abstract

The present application discloses an antenna device and a terminal. The antenna device includes a first antenna radiator, a second antenna radiator, a first non-NFC chip, and an NFC chip. The first antenna radiator includes a first feeding point and a first connection point, and the first connection point is used for grounding. The second antenna radiator includes a second feeding point and a second connection point, and the second connection point is used for grounding. The first antenna radiator and the second antenna radiator are connected through the first connection point and the second connection point. The first non-NFC chip is connected to the first feeding point and / or the second feeding point. The first non-NFC chip transmits a first non-NFC communication excitation current to the first antenna radiator through the first feeding point, and / or transmits a first non-NFC communication excitation current to the second antenna radiator through the second feeding point. The NFC chip transmits an NFC communication excitation current to the first antenna radiator through the first feeding point, and transmits an NFC communication excitation current to the second antenna radiator through the second feeding point.

Description

Technical Field

[0001] This application relates to the technical field of smart phones, and more particularly, to an antenna device and a terminal. Background Art

[0002] With the development of technology, smart phones are used more and more widely and have more and more functions, and have become an essential electronic device in people's daily lives. In a smart phone, a variety of antennas are often arranged inside, such as a cellular data antenna, a wireless communication (WIFI) antenna, a near field communication (NFC) antenna, etc. However, when arranging the antennas, in order to ensure the communication quality of the antennas, there is often a need for a certain distance between the antennas and other antennas and components inside the smart phone, resulting in a large occupied space for the antennas, which is not conducive to the miniaturization of electronic devices. Summary of the Invention

[0003] Embodiments of this application provide an antenna device and a terminal.

[0004] The antenna device of the embodiments of this application includes a first antenna radiator, a second antenna radiator, a first non-near field communication chip, and a near field communication chip. The first antenna radiator includes a first feeding point and a first connection point, and the first connection point is used for grounding. The second antenna radiator includes a second feeding point and a second connection point, and the second connection point is used for grounding. The first antenna radiator and the second antenna radiator are connected through the first connection point and the second connection point. The first non-near field communication chip is connected to the first feeding point and / or the second feeding point. The first non-near field communication chip transmits a first non-near field communication excitation current to the first antenna radiator through the first feeding point, and / or transmits the first non-near field communication excitation current to the second antenna radiator through the second feeding point. Two ends of the near field communication chip are respectively connected to the first feeding point and the second feeding point. The near field communication chip transmits a near field communication excitation current to the first antenna radiator through the first feeding point, and transmits the near field communication excitation current to the second antenna radiator through the second feeding point.

[0005] The terminal according to the embodiment of the present application includes a housing and an antenna device. The antenna device is disposed in the housing. The antenna device includes a first antenna radiator, a second antenna radiator, a first non-NFC chip, and an NFC chip. The first antenna radiator includes a first feeding point and a first connection point, and the first connection point is used for grounding. The second antenna radiator includes a second feeding point and a second connection point, and the second connection point is used for grounding. The first antenna radiator and the second antenna radiator are connected through the first connection point and the second connection point. The first non-NFC chip is connected to the first feeding point and / or the second feeding point. The first non-NFC chip transmits a first non-NFC communication excitation current to the first antenna radiator through the first feeding point, and / or transmits the first non-NFC communication excitation current to the second antenna radiator through the second feeding point. Two ends of the NFC chip are respectively connected to the first feeding point and the second feeding point. The NFC chip transmits an NFC communication excitation current to the first antenna radiator through the first feeding point, and transmits the NFC communication excitation current to the second antenna radiator through the second feeding point.

[0006] In the antenna device and the terminal according to the embodiment of the present application, since the first non-NFC chip can transmit a first non-NFC communication excitation current to the first antenna radiator through the first feeding point, or transmit the first non-NFC communication excitation current to the second antenna radiator through the second feeding point, and the NFC chip can also transmit an NFC communication excitation current to the first antenna radiator through the first feeding point, and can transmit the NFC communication excitation current to the second antenna radiator through the second feeding point. It can be seen that both the first non-NFC chip and the NFC chip can send signals through the first antenna radiator and the second antenna radiator, that is, the first non-NFC chip and the NFC chip share at least one of the first antenna radiator and the second antenna radiator. In this way, the occupied space of the NFC chip can be reduced, thereby reducing the overall occupied space of the antenna device, which is beneficial to the miniaturization of the terminal.

[0007] Additional aspects and advantages of the embodiments of the present application will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the embodiments of the present application. Description of the Drawings

[0008] The above and / or additional aspects and advantages of the present application will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0009] Figure 1 is a schematic plan view of an antenna device according to some embodiments of the present application;

[0010] Figure 2is a schematic plan view of a terminal according to some embodiments of the present application;

[0011] Figure 3 is a schematic plan view of an antenna device according to another embodiment of the present application;

[0012] Figure 4 is a schematic plan view of an antenna device according to yet another embodiment of the present application;

[0013] Figure 5 is a schematic plan view of an antenna device according to yet another embodiment of the present application;

[0014] Figure 6 is a schematic plan view of an antenna device according to still another embodiment of the present application;

[0015] Figure 7 is Figure 6 a schematic installation view of the antenna device;

[0016] Figure 8 is a schematic plan view of the internal structure of a terminal according to some embodiments of the present application;

[0017] Figure 9 and Figure 10 are schematic plan views of the coil and magnetic member of an antenna device according to some embodiments of the present application;

[0018] Figure 11 is a schematic plan view of a terminal according to some embodiments of the present application. Detailed Embodiments

[0019] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary only for explaining the embodiments of the present application and should not be construed as a limitation to the embodiments of the present application.

[0020] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0021] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected" and "coupled" shall be construed broadly. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection, an electrical connection or a connection capable of mutual communication; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. 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.

[0022] In the present application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0023] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. To simplify the disclosure of the present application, components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numerals and / or reference letters in different examples. Such repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0024] Please refer to Figure 1 , an embodiment of the present application provides an antenna device 100. The antenna device 100 includes a first antenna radiator 10, a second antenna radiator 20, a first non - near - field communication chip 30, and a near - field communication chip 40. The first antenna radiator 10 includes a first feeding point 11 and a first connection point 12, and the first connection point 12 is used for grounding. The second antenna radiator 20 includes a second feeding point 21 and a second connection point 22, and the second connection point 22 is used for grounding. The first antenna radiator 10 and the second antenna radiator 20 are connected through the first connection point 12 and the second connection point 22. The first non - near - field communication chip 30 is connected to the first feeding point 11 and / or the second feeding point 21. The first non - near - field communication chip 30 transmits a first non - near - field communication excitation current to the first antenna radiator 10 through the first feeding point 11 and / or transmits a first non - near - field communication excitation current to the second antenna radiator 20 through the second feeding point 21. Both ends of the near - field communication chip 40 are respectively connected to the first feeding point 11 and the second feeding point 21. The near - field communication chip 40 transmits a near - field communication excitation current to the first antenna radiator 10 through the first feeding point 11 and transmits a near - field communication excitation current to the second antenna radiator 20 through the second feeding point 21.

[0025] Among them, the first non - near - field communication chip 30 can be a cellular data communication chip, a Bluetooth (BT) communication chip, a Global Positioning System (GPS) communication chip, or a wireless network (WIFI) communication chip. The near - field communication chip 40 is an NFC (Near Field Communication) chip. Taking the first non - near - field communication chip 30 as a cellular data communication chip as an example in the present application, it can be understood that the first non - near - field communication chip 30 is not limited to a cellular data communication chip.

[0026] In the antenna device 100 according to the embodiment of the present application, since the first non-NFC chip 30 can transmit the first non-NFC excitation current to the first antenna radiator 10 through the first feeding point 11, or transmit the first non-NFC excitation current to the second antenna radiator 20 through the second feeding point 21, and the NFC chip can also transmit the NFC excitation current to the first antenna radiator 10 through the first feeding point 11 and transmit the NFC excitation current to the second antenna radiator 20 through the second feeding point 21. It can be seen that both the first non-NFC chip 30 and the NFC chip 40 can send signals through the first antenna radiator 10 and the second antenna radiator 20, that is, the first non-NFC chip 30 and the NFC chip 40 share at least one of the first antenna radiator 10 and the second antenna radiator 20. In this way, the occupied space of the NFC chip 40 can be reduced, thereby reducing the overall occupied space required by the antenna device 100, which is beneficial to the miniaturization of the terminal.

[0027] The following will be further described with reference to the drawings.

[0028] Please refer to Figure 2 , the terminal 1000 includes an antenna device 100, a housing 200, a bracket 300, a main board 400, and a display screen 500. Among them, the antenna device 100, the bracket 300, the main board 400, and the display screen 500 are all arranged in the housing 200. The antenna device 100, the bracket 300, and the main board 400 are arranged inside the housing 200, and the display screen 500 is arranged on the housing 200.

[0029] Among them, the terminal 1000 can be a mobile phone, a tablet computer, a notebook computer, a smart watch, a head-mounted display device, a game console, etc. In the embodiment of the present application, the terminal 1000 is taken as an example of a mobile phone for illustration. It can be understood that the specific form of the terminal 1000 is not limited to a mobile phone.

[0030] Please refer to Figure 1 , the antenna device 100 includes a first antenna radiator 10, a second antenna radiator 20, a first non-NFC chip 30, and an NFC chip 40. Among them, the first non-NFC chip 30 and the NFC chip 40 can share at least one of the first antenna radiator 10 and the second antenna radiator 20 to transmit signals. According to the above, the first non-NFC chip 30 is a cellular data communication chip, and the NFC chip 40 is an NFC chip.

[0031] Specifically, the first antenna radiator 10 and the second antenna radiator 20 are the antenna lines of the first non-NFC chip 30. The NFC chip 40 can transmit signals through the first antenna radiator 10 and the second antenna radiator 20. That is, the NFC chip 40 shares the antenna lines of the first non-NFC chip 30. Thus, the occupied space of the NFC chip 40 can be reduced, and thereby the overall occupied space required by the antenna device 100 can be reduced.

[0032] Among them, the first antenna radiator 10 and the second antenna radiator 20 can be any radiator structures in the terminal 1000. The first antenna radiator 10 and the second antenna radiator 20 can be independently arranged radiators, or can be printed circuits on the main board 400 of the terminal 1000, or can also be metal branches formed on the housing 200 of the terminal 1000, etc. The first antenna radiator 10 and the second antenna radiator 20 can be rigid or flexible. The materials of the first antenna radiator 10 and the second antenna radiator 20 can include materials with relatively high conductivity such as copper, magnesium, aluminum, silver, etc.

[0033] For example, the first antenna radiator 10 and the second antenna radiator 20 can be flexible printed circuit (FPC) antennas. For another example, the first antenna radiator 10 and the second antenna radiator 20 can also be laser-direct-structuring (LDS) antennas.

[0034] Please refer to again Figure 1 , the first antenna radiator 10 includes a first feeding point 11 and a first connection point 12. Among them, the first connection point 12 can be connected to the ground point of the terminal 1000. For example, the first connection point 12 is connected to the ground point on the main board 400 of the terminal 1000.

[0035] The second antenna radiator 20 includes a second feeding point 21 and a second connection point 22. Similarly, the second connection point 22 can be connected to the ground point of the terminal 1000. For example, the second connection point 22 is connected to the ground point of the main board 400 of the terminal 1000. Among them, the first antenna radiator 10 and the second antenna radiator 20 are connected through the first connection point 12 and the second connection point 22.

[0036] In one embodiment, the first connection point 12 and the second connection point 22 can also be commonly connected to the ground point of the main board of the terminal 1000 to be electrically connected through the main board 400 of the terminal 1000, so that the first antenna radiator 10 and the second antenna radiator 20 are connected.

[0037] In one embodiment, please combine Figure 3, the first non - NFC chip 30 can be connected to the first antenna radiator 10 through the first feeding point 11 to transmit the first non - NFC excitation current to the first antenna radiator 10. That is, the first non - NFC chip 30 can transmit signals through the first antenna radiator 10.

[0038] In another embodiment, please refer to Figure 4 , the first non - NFC chip 30 can be connected to the second antenna radiator 20 through the second feeding point 21 to transmit the first non - NFC excitation current to the second antenna radiator 20. That is, the first non - NFC chip 30 can transmit signals through the second antenna radiator 20.

[0039] In addition, please refer to Figure 1 , the first non - NFC chip 30 can also be connected to the first antenna radiator 10 through the first feeding point 11 and connected to the second antenna radiator 20 through the second feeding point 21 to transmit the first non - NFC excitation current to the first antenna radiator 10 and the second antenna radiator 20 respectively. That is, the first non - NFC chip 30 can emit signals through the first antenna radiator 10 and the second antenna radiator 20. Among them, when the first non - NFC chip 30 transmits the first non - NFC excitation current to the first antenna radiator 10 or the second antenna radiator 20, the first antenna radiator 10 or the second antenna radiator 20 will directly emit the signal from the terminal 1000.

[0040] Please refer to Figure 1 , the NFC chip 40 can transmit the NFC excitation current through the first feeding point 11 and the second feeding point 21. Among them, the NFC chip 40 can send the positive NFC excitation current through the first feeding point 11 and send the negative NFC excitation current through the second feeding point 21. That is, the end of the NFC chip 40 connected to the first feeding point 11 is the positive port, and the end of the NFC chip 40 connected to the second feeding point 21 is the negative port. The NFC excitation current transmitted by the NFC chip 40 can be transmitted through the first feeding point 11 and return to the NFC chip 40 through the second feeding point 21, thus forming a current loop.

[0041] Similarly, the NFC chip 40 can also send the negative NFC excitation current through the first feeding point 11 and send the positive NFC excitation current through the second feeding point 21. That is, the end of the NFC chip 40 connected to the first feeding point 11 is the negative port, and the end of the NFC chip 40 connected to the second feeding point 21 is the positive port. The NFC excitation current transmitted by the NFC chip 40 can be transmitted through the second feeding point 21 and return to the NFC chip 40 through the first feeding point 11, thus forming a current loop.

[0042] Please refer toFigure 5 In some embodiments, the antenna device 100 includes a first inductor 50 and a second inductor 60.

[0043] As can be seen from the above, the first non-NFC chip 30 is a cellular data communication chip, and the NFC chip 40 is an NFC chip. Generally, the operating frequency of the NFC chip is about 13.5 megahertz (MHz), while the operating frequency of the cellular data communication chip is above 600 MHz. It can be understood that the operating frequency of the NFC chip 40 is less than that of the cellular data communication chip.

[0044] And in combination with Figure 5 , it can be seen that both ends of the NFC chip 40 are connected to the first feeding point 11 and the second feeding point 21 respectively through the second inductor 60, and the first connection point 12 and the second connection point 22 are grounded through the first inductor 50.

[0045] Among them, the first inductor 50 and the second inductor 60 can be disposed on the main board 400 of the terminal 1000. When the NFC chip 40 transmits the NFC excitation current to the first antenna radiator 10 and the second antenna radiator 20, it can be through the main board 400 to transmit to the second inductor 60 connected to the first feeding point 11, and then through the first inductor 50 to transmit to the second inductor 60 connected to the second feeding point 21, so as to transmit back to the NFC chip 40.

[0046] In addition, the first inductor 50 can be connected to the ground point of the main board 400, and the first connection point 12 and the second connection point 22 can be connected to the ground point of the main board 400 through the first inductor 50 for grounding.

[0047] Preferably, the first inductor 50 may not be connected to the ground point of the main board 400. In this way, when the NFC chip 40 transmits the NFC excitation current to the first antenna radiator 10 and the second antenna radiator 20, the NFC excitation current does not pass through the ground point of the main board 400, so as to avoid the loss of the NFC excitation current caused by grounding, and thus avoid the loss of the magnetic field energy generated by the NFC excitation current, so that the performance of the NFC chip 40 is better.

[0048] Specifically, the operating principles of the first inductor 50 and the second inductor 60 are as follows: they conduct low-frequency signals and block high-frequency signals. Thus, when the near-field communication chip 40 is operating, the high-frequency signals generated by the first non-near-field communication chip 30 cannot be transmitted to the near-field communication chip 40 through the first inductor 50 and the second inductor 60. That is, when the first non-near-field communication chip 30 transmits the first non-near-field communication excitation current to the first antenna radiator 10, the first non-near-field communication excitation current will not be transmitted to the second antenna radiator 20 through the first inductor 50. Similarly, when the first non-near-field communication chip 30 transmits the first non-near-field communication excitation current to the second antenna radiator 20, the first non-near-field communication excitation current will not be transmitted to the first antenna radiator 10 through the first inductor 50. Moreover, the first non-near-field communication excitation current will not be transmitted to the near-field communication chip 40 through the second inductor 60 either.

[0049] Therefore, it can be ensured that when the first non-near-field communication chip 30 and the near-field communication chip 40 are operating, the first non-near-field communication excitation current transmitted by the first non-near-field communication chip 30 will not affect the near-field communication chip 40, so as to ensure the normal operation of the antenna device 100.

[0050] In addition, please combine Figure 5 , in some embodiments, the antenna device 100 may further include a capacitor 70. The first non-near-field communication chip 30 may be connected to the first feeding point 11 through the capacitor 70, or may be connected to the second feeding point 21 through the capacitor 70, or may be connected to the first feeding point 11 and the second feeding point 21 respectively through two capacitors 70.

[0051] Similarly, the capacitor 70 may also be disposed on the main board 400 of the terminal 1000. When the first non-near-field communication chip 30 transmits the first non-near-field communication excitation current to the first antenna radiator 10 and the second antenna radiator 20, it may be through the main board 400 to transmit to the capacitor 70 connected to the first feeding point 11 and then to the first antenna radiator 10, and through the capacitor 70 connected to the second feeding point 21 and then to the second antenna radiator 20.

[0052] Since the first inductor 50 is disposed between the first antenna radiator 10 and the second antenna radiator 20, when the first non-near-field communication chip 30 transmits the first non-near-field communication excitation current to the first antenna radiator 10, it will not be transmitted to the second antenna radiator 20. Similarly, when the first non-near-field communication chip 30 transmits the first non-near-field communication excitation current to the second antenna radiator 20, it will not be transmitted to the first antenna radiator 10.

[0053] Furthermore, the operating principle of the capacitor 70 is: passing high-frequency signals and blocking low-frequency signals. Therefore, when the near-field communication chip 40 transmits the near-field communication excitation current to the first antenna radiator 10 and the second antenna radiator 20, it cannot be transmitted to the first non-near-field communication chip 30 through the capacitor 70.

[0054] In this way, it can be ensured that when the first non-near-field communication chip 30 and the near-field communication chip 40 are working, the first non-near-field communication excitation current transmitted by the first non-near-field communication chip 30 will not affect the near-field communication chip 40, and the near-field communication excitation current transmitted by the near-field communication chip 40 will not affect the first non-near-field communication chip 30, thereby achieving complete isolation of the signals between the first non-near-field communication chip 30 and the near-field communication chip 40 to ensure the normal operation of the antenna device 100.

[0055] Please refer to Figure 6 , the antenna device 100 may further include a coil 80 and a magnetic member 90. Among them, the coil 80 is disposed on the surface of the magnetic member 90.

[0056] In one embodiment, the coil 80 is attached to the surface of the magnetic member 90, and the surface of the magnetic member 90 that is not attached to the coil 80 may be disposed on the main board 400, so as to be disposed in the housing 200 of the terminal 1000.

[0057] In another embodiment, please refer to Figure 7 , the coil 80 is attached to the surface of the magnetic member 90, and the surface of the magnetic member 90 that is not attached to the coil 80 may be disposed on the bracket 300, and the bracket 300 is disposed on the main board 400, so as to be disposed in the housing 200 of the terminal 1000.

[0058] Specifically, the coil 80 is connected to the near-field communication chip 40. It can be understood that the coil 80 and the magnetic member 90 are the antenna lines of the near-field communication chip 40, and the near-field communication chip 40 can transmit the near-field communication excitation current to the first antenna radiator 10 and the second antenna radiator 20 through the coil 80.

[0059] For example, the near-field communication chip 40 transmits the near-field communication excitation current to the second antenna radiator 20 through the second inductor 60 connected to the second feeding point 21, then transmits the near-field communication excitation current to the first antenna radiator 10 through the first inductor 50, and then transmits it to the coil 80 through the second inductor 60 connected to the first feeding point 11, and finally transmits it back to the near-field communication chip 40 through the coil 80 to form a complete loop.

[0060] Currently, in the terminal 1000, due to the constraints of the surrounding components on the near-field communication (NFC) chip 40, the volume becomes smaller and smaller. The smaller space will cause the performance of the NFC chip to drop sharply, resulting in a poor card-swiping experience for users.

[0061] Please refer to Figure 2 and Figure 8 After the near-field communication chip 40 is installed in the terminal 1000, the antenna line (coil 80) of the near-field communication chip 40 needs to pass through a ferrite material to reduce the influence of the conductor in the housing 200 of the terminal 1000 on the magnetic field generated by the coil 80. Among them, the ferrite is sintered from materials such as nickel-zinc iron, and after being broken, it is bonded with a special glue. Specifically, the ferrite is the magnetic part 90. In addition, the magnetic part 90 can also be composed of other materials, not limited to ferrite.

[0062] When installing the NFC chip, that is, the near-field communication chip 40, if the antenna line (the first antenna radiator 10 or the second antenna radiator 20) of the first non-near-field communication chip 30 is too close to the near-field communication chip 40 (such as Figure 8 at the L1 and L2 positions shown), it will cause the first non-near-field communication excitation current transmitted by the first non-near-field communication chip 30 to the first antenna radiator 10 or the second antenna radiator 20 to affect the near-field communication excitation current transmitted by the near-field communication chip 40 to the first antenna radiator 10 and the second antenna radiator 20, resulting in interference in the signals transmitted by the first non-near-field communication chip 30 and the near-field communication chip 40.

[0063] And if the near-field communication chip 40 is too close to the camera 600 of the terminal 1000 (such as Figure 8 at the L4 position shown), it will cause the metal in the camera 600 to also affect the signal transmitted by the near-field communication chip 40. Therefore, the distances at the L1, L2, and L4 positions need to be large enough.

[0064] In addition, since the coil 80 is arranged on the surface of the magnetic part 90, and the material of the magnetic part 90 has a great influence on the first antenna radiator 10 and the second antenna radiator 20, it is impossible to directly move the position of the coil 80.

[0065] On the other hand, since the ferrite (magnetic part 90) is prone to dropping debris, to ensure that the debris dropped by the ferrite does not enter the battery core of the battery 700 of the terminal 1000 (as Figure 8 shown), to ensure that the battery 700 does not catch fire, the distance L3 between the near-field communication chip 40 and the battery 700 also needs to be large enough. In this way, when installing the near-field communication chip 40, a large amount of space will be occupied.

[0066] In the antenna device 100 and the terminal 1000 of the embodiment of the present application, such as Figures 1 to 4As shown, since the first non-NFC chip 30 and the NFC chip 40 share at least one of the first antenna radiator 10 and the second antenna radiator 20, the problems of the distance between the first antenna radiator 10 and the second antenna radiator 20, the influence of the ferrite on the battery 700, and the distance between the coil 80 and the camera 600 do not need to be considered, thereby meeting the size requirements of L1, L2, L3, and L4, and ensuring better performance of the NFC chip 40.

[0067] More specifically, as Figure 7 shown, the coil 80, the magnetic member 90, the bracket 300, and the main board 400 are stacked in sequence. More specifically, please refer to Figure 2 and Figure 6 , in the light-emitting direction of the display screen 500 of the terminal 1000 (such as the Z direction shown in Figure 2 ), the display screen 500, the main board 400, the bracket 300, the magnetic member 90, the coil 80, and the housing 200 are stacked in sequence.

[0068] According to this structure, the main board 400 is located on the side closest to the display screen 500 of the terminal 1000, that is, the side farthest from the housing 200 of the terminal 1000. Then the coil 80 is located on the side farthest from the display screen 500 of the terminal 1000, that is, the side closest to the housing 200 of the terminal 1000. That is, the coil 80 is installed on the bracket 300 through the magnetic member 90, and then installed on the main board 400 through the bracket 300 to be disposed inside the housing 200.

[0069] Among them, the magnetic member 90 is located between the coil 80 and the bracket 300 and covers the coil (such as the orthographic projection of the magnetic member 90 on the bracket 300 covers the orthographic projection of the coil 80 on the bracket 300). In this way, the weakening of the magnetic field generated by the metal on the main board 400 and the bracket 300 on the coil 80 can be isolated, thereby ensuring the performance of the antenna circuit of the NFC chip 40. On the other hand, it can also ensure that the magnetic field generated by the coil 80 does not diverge in the direction close to the display screen 500 to ensure the normal operation of the display screen 500, that is, the magnetic field generated by the coil 80 will only be emitted through the housing 200, thereby ensuring the performance of the NFC chip 40.

[0070] In another embodiment, please refer to Figure 9 and Figure 10 , the magnetic member 90 may include a first magnetic part 91 and a second magnetic part 92. The coil 80 may include a first coil trace 81 and a second coil trace 82. Among them, the current direction of the first coil trace 81 and the current direction of the second coil trace 82 are opposite.

[0071] Among them, the first magnetic part 91 is arranged on the side of the coil 80 opposite to the bracket 300 and covers the first side (the side far from the bracket 300) of the first coil trace 81. The second magnetic part 92 is arranged between the bracket 300 and the second coil trace 82 and covers the second side (the side close to the bracket 300) of the second coil trace 82. It can be understood that the first side and the second side are opposite. Please refer to Figure 9 and Figure 10 , it can be seen that the first magnetic part 91 is located above the first coil trace 81 and partially covers the first coil trace 81. The second magnetic part 92 is located between the bracket 300 and the coil 80 and completely covers the coil 80.

[0072] More specifically, since the current directions of the first coil trace 81 and the second coil trace 82 are opposite, when the first coil trace 81 and the second coil trace 82 are close to each other, the magnetic fields generated by the first coil trace 81 and the second coil trace 82 will affect each other, thereby affecting the overall magnetic field strength of the coil 80 and resulting in a decrease in the overall magnetic field strength of the coil 80.

[0073] The first magnetic part 91 covers the first coil trace 81, which can isolate the reverse current generated by the first coil 80, thereby isolating the magnetic field generated by the first coil trace 81, so that the current direction generated by the coil 80 is unified, thereby obtaining a better magnetic field radiation effect and enabling the communication performance of the near-field communication chip 40 to be better. And the second magnetic part 92 covers the coil 80, which can completely isolate the second coil trace 82 and the bracket 300, thereby isolating the weakening of the magnetic field generated by the metal on the main board 400 and the bracket on the coil 80, thus ensuring that the overall performance of the near-field communication chip 40 is better.

[0074] Among them, the number of the first coil traces 81 is less than the number of the second coil traces 82. For example, when the number of the first coil traces 81 is N, the number of the second coil traces 82 can be N + 1, etc., where N is a positive integer.

[0075] Combined with Figure 9 and Figure 10 , it can be seen that the second magnetic part 92 is located between the second coil trace 82 and the bracket 300 to isolate the bracket 300 and the second coil trace 82. The first magnetic part 91 only covers a part of the first coil trace 81. Therefore, the side of the second coil trace 82 opposite to the back cover of the terminal 1000 is not covered by the magnetic part 90. And the number of the first coil traces 81 is less than the number of the second coil traces 82, which can make the magnetic field generated by the second coil trace 82 stronger, so that the magnetic field strength emitted by the second coil trace 82 is stronger, thus ensuring that the overall performance of the near-field communication chip 40 is better.

[0076] In addition, the number of turns of the coil 80 can be multiple turns, that is, greater than 1 turn. For example, the number of turns of the coil 80 can be two turns, three turns, four turns, and more turns, etc. Thus, compared with the antenna of a single coil 80, the inductance of the first coil trace 81 of the multiple coils 80 is larger and the radiation ability is stronger, thereby ensuring better overall performance of the near-field communication chip 40.

[0077] In some embodiments, the antenna device 100 may further include a second non-near-field communication chip (not shown in the figure). Among them, the third antenna module can be a Bluetooth (BT) antenna, a Global Positioning System (GPS) antenna, or a wireless network (WIFI) antenna.

[0078] Specifically, when the first non-near-field communication chip 30 is connected to the first feeding point 11 to transmit the first non-near-field communication excitation current to the first antenna radiator 10 through the first feeding point 11, the second non-near-field communication chip can be connected to the second feeding point 21 and transmit the second non-near-field communication excitation current to the second antenna radiator 20 through the second feeding point 21 to complete the signal transmission.

[0079] Similarly, when the first non-near-field communication chip 30 is connected to the second feeding point 21 to transmit the first non-near-field communication excitation current to the second antenna radiator 20 through the second feeding point 21, the second non-near-field communication chip can be connected to the first feeding point 11 and transmit the second non-near-field communication excitation current to the first antenna radiator 10 through the first feeding point 11 to complete the signal transmission. Thus, the terminal 1000 can complete the transmission of multiple signals through the antenna device 100.

[0080] Please refer to Figure 1 、 Figure 2 and Figure 8 , the terminal 1000 may include a front surface 1001, a back surface 1002, and a side surface 1003.

[0081] Specifically, the first antenna radiator 10, the second antenna radiator 20, and the bracket 300 can be arranged on the front surface 1001, can also be arranged on the back surface 1002, or can also be arranged on the side surface 1003, and at least two of the first antenna radiator 10, the second antenna radiator 20, and the bracket 300 have different arrangement positions.

[0082] For example, when the first antenna radiator 10 and the second antenna radiator 20 are disposed on the side surface 1003, the bracket 300 can be disposed on the back surface 1002. In this way, when the first non-NFC chip 30 transmits the first non-NFC excitation current, signals can be emitted from the side surface 1003 of the terminal 1000 through the first antenna radiator 10 and the second antenna radiator 20 disposed on the side surface 1003. When the NFC chip 40 transmits the NFC excitation current, signals can be emitted from the side surface 1003 of the terminal 1000 through the first antenna radiator 10 and the second antenna radiator 20 disposed on the side surface 1003, or signals can be directly emitted from the back surface 1002 of the terminal 1000 through the bracket 300 disposed on the back surface. In this way, the NFC chip 40 can send signals in multiple directions and at multiple angles.

[0083] Preferably, the first antenna radiator 10 and the second antenna radiator 20 are disposed on the side surface 1003 and are disposed near the top 1004 of the terminal 1000, and the bracket 300 is disposed near the back surface 1002. In this way, when a user needs to swipe a card using the NFC function, the user can contact the sensor through the back surface 1002 or the top of the terminal 1000 to facilitate card swiping. As a result, the NFC function is not limited to being implemented on the back surface 1002 of the terminal 1000, but can also be implemented on the side surface 1003, that is, the free card swiping function of the NFC function in different directions and at different angles is realized, thereby greatly improving the user experience.

[0084] Please refer to Figure 2 , the housing 200 may further include a metal frame 201. The metal frame 201 is disposed on the side surface 1003 of the terminal 1000.

[0085] Specifically, the first antenna radiator 10 and the second antenna radiator 20 may be part of the metal frame 201. For example, the first antenna radiator 10 and the second antenna radiator 20 are metal branches of the metal frame 201, or may be printed circuits on the metal frame 201. Preferably, the first antenna radiator 10 and the second antenna radiator 20 are located at the top 1004 of the terminal 1000. In this way, the communication of the NFC chip 40 is not limited to being implemented on the back surface 1002 of the terminal 1000, but can also be implemented at the top 1004, that is, the free card swiping function of the NFC function in different directions and at different angles is realized, thereby greatly improving the user experience.

[0086] In some embodiments, the housing 200 may further include a plastic frame (not shown in the figure). The plastic frame may be disposed on the top 1004 of the terminal 1000. The first antenna radiator 10 and the second antenna radiator 20 may also be an FPC antenna or an LDS antenna, and the first antenna radiator 10 and the second antenna radiator 20 may be attached to the plastic frame.

[0087] In the antenna device 100 and the terminal 1000 according to the embodiments of the present application, by sharing the first antenna radiator 10 and the second antenna radiator 20 between the first non-NFC chip 30 and the NFC chip 40, the NFC chip 40 can not only transmit signals through the first antenna radiator 10 and the second antenna radiator 20, but also transmit signals through the bracket 300, so as to increase the directions and angles for realizing the signal transmission of the NFC chip 40, thereby improving the user experience.

[0088] On the other hand, sharing the first antenna radiator 10 and the second antenna radiator 20 between the first non-NFC chip 30 and the NFC chip 40 can also avoid the limitation of the installation method of the NFC chip 40, thereby reducing the occupied space required for installing the NFC chip 40, and thus reducing the manufacturing cost.

[0089] On yet another aspect, when the coil connected to the NFC chip 40 has multiple turns, by setting an asymmetric coil trace and covering a smaller part of the coil trace with the magnetic member 90 to isolate the reverse current of the smaller part of the coil trace, that is, the first coil trace 81, the weakening of the magnetic field generated by the entire coil 80 caused by the reverse current brought by the first coil trace 81 is reduced. At the same time, the current direction of the entire antenna circuit can be unified, so as to increase the inductance of the entire antenna circuit, and thus the overall performance of the NFC chip 40 is better. Moreover, when the inductance of the coil 80 increases and the capacitance value of the circuit for matching the NFC chip 40 is reduced, the error loss of the device can be reduced, and the overall consistency of the terminal 1000 can be better.

[0090] In the description of this specification, the descriptions with reference to the terms "certain embodiments", "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0091] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An antenna device, characterized in that, Comprising: A first antenna radiator, the first antenna radiator includes a first feeding point and a first connection point, and the first connection point is used for grounding; A second antenna radiator, the second antenna radiator includes a second feeding point and a second connection point, the second connection point is used for grounding, the first antenna radiator and the second antenna radiator are spaced apart and connected through the first connection point and the second connection point; A first non-NFC chip, the first non-NFC chip is connected to the first feeding point and / or the second feeding point, and the first non-NFC chip transmits a first non-NFC communication excitation current to the first antenna radiator through the first feeding point, and / or transmits the first non-NFC communication excitation current to the second antenna radiator through the second feeding point; An NFC chip, both ends of the NFC chip are respectively connected to the first feeding point and the second feeding point, and the NFC chip transmits an NFC communication excitation current to the first antenna radiator through the first feeding point, and transmits the NFC communication excitation current to the second antenna radiator through the second feeding point; A magnetic member and a coil, the coil is attached to the surface of the magnetic member, the surface of the magnetic member not attached to the coil is arranged on the main board, and the coil is respectively connected to the first feeding point and the NFC chip; The NFC chip transmits an NFC communication excitation current to the first antenna radiator and the second antenna radiator through the coil.

2. The antenna device according to claim 1, wherein The antenna device includes a first inductor and a second inductor, the first connection point and the second connection point are connected through the first inductor, and both ends of the NFC chip are respectively connected to the first feeding point and the second feeding point through the second inductor.

3. The antenna device according to claim 2, characterized in that, The antenna device further includes a capacitor, and the first non-NFC chip is connected to the first feeding point and / or the second feeding point through the capacitor.

4. The antenna device according to claim 1, wherein The magnetic member includes a first magnetic part and a second magnetic part, the coil further includes a first coil trace and a second coil trace, the current directions of the first coil trace and the second coil trace are opposite, the first magnetic part covers a first side of the first coil trace, the second coil trace is arranged on the second magnetic part and covers a second side of the second coil trace, and the first side and the second side are opposite.

5. The antenna device according to claim 4, characterized in that, The number of the first coil traces is less than the number of the second coil traces.

6. The antenna device according to claim 1, characterized in that, The number of turns of the coil is greater than 1.

7. The antenna device according to claim 1, characterized in that, The antenna device further includes a second non-NFC chip, When the first non-NFC chip is connected to the first feeding point, the second non-NFC chip is connected to the second antenna radiator through the second feeding point, and the second non-NFC chip transmits a second non-NFC communication excitation current to the second antenna radiator through the second feeding point; Or When the first non-NFC chip is connected to the second feeding point, the second non-NFC chip is connected to the first antenna radiator through the first feeding point, and the second non-NFC chip transmits a second non-NFC communication excitation current to the first antenna radiator through the first feeding point.

8. A terminal, characterized in that, It includes a housing and the antenna device according to any one of claims 1-7, and the antenna device is arranged in the housing.

9. The terminal according to claim 8, wherein The magnetic member of the antenna device includes a first magnetic part and a second magnetic part. The terminal further includes a bracket and a main board. The bracket is arranged on the main board. The coil of the antenna device is arranged on the bracket through the magnetic member. The first magnetic part is arranged on the side of the first coil trace of the coil opposite to the bracket, and the second magnetic part is arranged between the second coil trace of the coil and the bracket.

10. The terminal according to claim 9, characterized in that, The terminal further includes a display screen. In the light-emitting direction of the display screen, the housing, the coil, the magnetic member, the bracket, the main board, and the display screen are stacked in sequence. The terminal includes a front face, a back face, and a side face. The first antenna radiator, the second antenna radiator, and the bracket can all be arranged on the front face, the back face, or the side face, and the installation positions of at least two of the first antenna radiator, the second antenna radiator, and the bracket are different; or The first antenna radiator and the second antenna radiator are arranged on the side face and close to the top of the terminal, and the bracket is arranged close to the back face.

11. The terminal according to claim 10, wherein The housing includes a metal frame, the metal frame is arranged on the side face, and the first antenna radiator and the second antenna radiator are part of the metal frame.

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