NFC antenna assembly and intelligent communication equipment

Abstract

The NFC antenna assembly provided by the utility model is applied to intelligent communication equipment, the NFC antenna assembly comprises a radiation unit, a matching circuit unit electrically connected with the radiation unit and a control unit, and the control unit is electrically connected with the matching circuit unit. The control unit is used for controlling the matching circuit unit to tune the radiation unit so as to generate radiation; the radiation unit comprises a first radiation body, a second radiation body and a third radiation body, the first radiation body is connected with the second radiation body, and the third radiation body is coupled with the second radiation body and the first radiation body to form a closed-loop NFC antenna. The NFC antenna assembly provided by the utility model can solve the problem that the NFC antenna is difficult to design under the condition that the size of the camera module is large, effectively improves the induction area and radiation effect of the NFC antenna, and greatly improves the user experience.

Description

Technical Field

[0001] The utility model relates to the field of communication technologies, and particularly to an NFC antenna assembly and an intelligent communication device. Background Art

[0002] NFC (Near Field Communication) near-field communication technology is evolved from the integration of non-contact radio frequency identification and interconnection technology. It can combine the functions of an inductive card reader, an inductive card, and point-to-point on a single chip, and can identify and exchange data with compatible devices within a short distance. In recent years, NFC communication technology has been widely used in fields such as file transfer, mobile payment, public transportation, and medical health. Especially in the field of public transportation, many cities in China have launched the service of using NFC mobile phones as bus cards and subway cards. People no longer need to queue up to recharge their bus cards, nor do they need to use bus cards to take the subway or bus. At the same time, on electronic products, especially smartphones, there is a need for a camera function and a super-high-frequency communication function, and currently, the trend is that the number of cameras is increasing, and the number of super-high-frequency antennas is also increasing, such as diversity antennas, WiFi, and Bluetooth antennas. Most cameras and super-high-frequency communication antennas are arranged above the main board bracket. Often, the NFC antenna is also arranged between the main board bracket and the back cover because the radiation of NFC at this position can provide a better user experience for users. Therefore, there are often mutual interference situations in the design between the camera module, the super-high-frequency antenna module, and the NFC antenna. Especially currently, the number of cameras in communication devices is increasing continuously, and the volume of the cameras is also increasing continuously. Therefore, the space left for the NFC antenna will be extremely small. It is very difficult to achieve a better NFC induction effect or induction area.

[0003] In view of this, it is indeed necessary for the utility model to provide a new type of NFC antenna assembly and an intelligent communication device applying this antenna assembly. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an NFC antenna assembly, which can solve the problem of difficult NFC antenna design in the case of a large volume of the camera module, and at the same time effectively improve the induction area and radiation effect of the NFC antenna, and greatly improve the user experience.

[0005] To solve the above technical problems, the present utility model provides an NFC antenna assembly, which is applied to an intelligent communication device. The NFC antenna assembly includes a radiation unit, a matching circuit unit electrically connected to the radiation unit, and a control unit. The control unit is electrically connected to the matching circuit unit and controls the matching circuit unit to tune the radiation unit to generate radiation. The radiation unit includes a first radiator, a second radiator, and a third radiator. The first radiator is connected to the second radiator, and the third radiator is coupled to the second radiator and the first radiator to form a closed-loop NFC antenna.

[0006] As a further improvement of the present utility model, the first radiator is configured as a coil and is located beside the camera module in the intelligent communication device.

[0007] As a further improvement of the present utility model, the second radiator is configured to be L-shaped, surrounds the camera module, and is connected to the first radiator to semi-surround the camera module.

[0008] As a further improvement of the present utility model, the third radiator is configured as a strip-shaped rectangular radiator, and the third radiator is located above the camera module and is coupled to the first radiator and the second radiator.

[0009] As a further improvement of the present utility model, a first electrical connection point is provided at the end position of the first radiator, a second electrical ground point is provided at the end position of the second radiator, a third electrical connection point is provided at one end of the third radiator close to the first electrical connection point, and a fourth electrical connection point is provided at one end of the third radiator close to the second electrical connection point.

[0010] As a further improvement of the present utility model, the third radiator is further provided with a fifth electrical connection point and a sixth electrical connection point, and the third radiator is configured as a UHF antenna radiator.

[0011] As a further improvement of the present utility model, the first radiator is connected to the matching circuit unit through the first electrical connection point, a first isolation electronic component is provided between the second radiator and the third radiator, and a second isolation electronic component is provided between the third radiator and the matching circuit unit.

[0012] As a further improvement of the present utility model, the third electrical connection point of the third radiator and the fourth electrical connection point are respectively connected to the first isolation electronic component and the second isolation electronic component; one end of the first isolation electronic component is connected to the third electrical connection point, and the other end is connected to the matching circuit unit; one end of the second isolation electronic component is connected to the fourth electrical connection point, and the other end is connected to the second radiator.

[0013] As a further improvement of the present utility model, both the first isolation electronic component and the second isolation electronic component are configured as isolation resistors.

[0014] The purpose of the present utility model is to provide an intelligent communication device to better apply the above-mentioned NFC antenna assembly.

[0015] To solve the above technical problems, the present utility model provides an intelligent communication device, and the intelligent communication device includes the aforementioned NFC antenna assembly.

[0016] The present utility model provides an NFC antenna assembly, which is applied to an intelligent communication device. The NFC antenna assembly includes a radiation unit, a matching circuit unit electrically connected to the radiation unit, and a control unit. The control unit is electrically connected to the matching circuit unit and controls the matching circuit unit to tune the radiation unit to generate radiation. The radiation unit includes a first radiator, a second radiator, and a third radiator. The first radiator is connected to the second radiator, and the third radiator is coupled to the second radiator and the first radiator to form a closed-loop NFC antenna. The NFC antenna assembly of the present utility model can solve the problem of difficult NFC antenna design when the volume of the camera module is large, and at the same time effectively improve the induction area and radiation effect of the NFC antenna, greatly improving the user experience. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the NFC antenna assembly of the present utility model.

[0018] Figure 2 It is a schematic structural diagram of the radiation unit of the present utility model.

[0019] Among them, the descriptions of each reference numeral are as follows:

[0020] The first radiator 11, the second radiator 12, the third radiator 2, the camera module 3, the first electrical connection point 111, the second electrical connection point 121, the third electrical connection point 23, the fourth electrical connection point 21, the fifth electrical connection point 24, the sixth electrical connection point 22. Detailed Description of the Invention

[0021] The following further elaborates on the NFC antenna assembly proposed by the present utility model and the communication device applying the NFC antenna assembly in conjunction with the accompanying drawings and specific embodiments. It should be noted that the accompanying drawings are all in very simplified forms and use non-precise scales, only for conveniently and clearly assisting in explaining the purpose of the embodiments of the present utility model. In addition, the structures shown in the accompanying drawings are often part of the actual structures. In particular, the accompanying drawings need to show different emphases and sometimes use different scales.

[0022] NFC near-field communication technology evolved from the integration of non-contact radio frequency identification and interconnection. It combines the functions of an inductive card reader, an inductive card, and point-to-point on a single chip, enabling identification and data exchange with compatible devices within a short distance. In recent years, NFC communication technology has been widely applied in fields such as file transfer, mobile payment, public transportation, and medical health. Especially in the field of public transportation, many cities in China have launched services using NFC mobile phones as bus cards and subway cards. People no longer need to queue up to recharge their bus cards and no longer need to use bus cards to take the subway or bus. At the same time, electronic products, especially smart communication devices, generally require a camera function and a super-high-frequency communication function. Currently, the trend is that the number of cameras is increasing, and the number of super-high-frequency antennas is also increasing, such as diversity antennas, WiFi, and Bluetooth antennas. Most cameras and super-high-frequency communication antennas are arranged above the main board bracket. Therefore, there are often interference situations among the camera module, the super-high-frequency antenna module, and the NFC antenna in the design. Especially with the continuous increase of current communication devices and the continuous increase in the volume of cameras, the space left for the NFC antenna is extremely small, making it difficult to achieve a good NFC induction effect or area.

[0023] Therefore, the present invention proposes an NFC antenna assembly applied to smart communication devices such as mobile phones and tablets. Combining Figure 1 and Figure 2 as shown, specifically, the NFC antenna assembly includes a radiation unit, a matching circuit unit electrically connected to the radiation unit, and a control unit. The control unit is electrically connected to the matching circuit unit and controls the matching circuit unit to tune the radiation unit to generate radiation. The radiation unit includes a first radiator 11, a second radiator 12, and a third radiator 2. The first radiator 11 is connected to the second radiator 12. After the third radiator 2 is coupled to the second radiator 12 and the first radiator 11, a closed-loop NFC antenna is formed. With such a setting, the NFC antenna assembly of the present utility model can solve the problem of difficult NFC antenna design in the case of a large volume of the camera module, and at the same time effectively improve the NFC antenna induction area and radiation effect, greatly improving the user experience.

[0024] Further, the first radiator 11 is configured as a coil and is located beside the camera module 3 in the intelligent communication device. The second radiator 12 is configured in an L-shaped arrangement, the second radiator 12 surrounds the camera module 3 and is connected to the first radiator 11 to semi-enclose the camera module 3. The third radiator 2 is configured as a strip-shaped rectangular radiator, and the third radiator 2 is located above the camera module 3 and is coupled to the first radiator 11 and the second radiator 12.

[0025] Further, a first electrical connection point 111 is provided at the end of the first radiator 11, a second electrical connection point 121 is provided at the end of the second radiator 12, a third electrical connection point 23 is provided at one end of the third radiator 2 close to the first electrical connection point 111, and a fourth electrical connection point 21 is provided at one end of the third radiator 2 close to the second electrical connection point 121. The third radiator 2 is also provided with a fifth electrical connection point 24 and a sixth electrical connection point 22, and the third radiator 2 is configured as an ultra-high frequency antenna radiator.

[0026] Further, the first radiator 11 is connected to the matching circuit unit through the first electrical connection point 111, a first isolation electronic component is provided between the second radiator 12 and the third radiator 2, and a second isolation electronic component is provided between the third radiator 2 and the matching circuit unit. The third electrical connection point 23 and the fourth electrical connection point 21 of the third radiator 2 are connected to the first isolation electronic component and the second isolation electronic component respectively; one end of the first isolation electronic component is connected to the third electrical connection point 23, and the other end is connected to the matching circuit unit; one end of the second isolation electronic component is connected to the fourth electrical connection point 21, and the other end is connected to the second radiator 12. Preferably, the first isolation electronic component and the second isolation electronic component are both configured as isolation resistors.

[0027] That is to say, for intelligent communication devices such as mobile phones, currently when the camera module 3 is relatively large and placed in the center, only the first radiator 11 can be used as the NFC antenna. However, the area of the first radiator 11 is small, making it difficult to achieve good NFC performance. Based on the first radiator 11, the present invention adds a second radiator 12 around the camera module 3, and at the same time uses the ultra-high frequency antenna on the top frame of the intelligent communication device as the third radiator 2, so that the NFC antenna forms a closed loop. The first radiator 11 and the second radiator 12 increase the overall area of the NFC antenna, thus improving the overall performance of the antenna. The third radiator 2 is configured as the high-frequency antenna of the top frame of the intelligent communication device. With this setting, the induction area of the NFC antenna at the top frame position can be greatly increased, especially making the front of the screen also have a certain radiation of the NFC antenna, greatly enhancing the user experience effect.

[0028] Of course, the third radiator 2 can also be configured in the form of an FPC attached to a non-metal top frame, or can be configured as a metal top frame. The fifth electrical connection point 24 and the sixth electrical connection point 22 of the third radiator 2, and the third radiator 2 is configured as an ultra-high frequency antenna radiator. That is to say, the third radiator 2 can be configured as an ultra-high frequency antenna, and can also be used to connect the first radiator 11 and the second radiator 12. Among them, two circuit connection points for connecting the matching circuit unit generally connect an inductor and then connect the matching circuit. In this way, the inductor can isolate the ultra-high frequency electrical signals on the ultra-high frequency antenna or the matching circuit unit, so that the ultra-high frequency antenna or the circuit and the NC antenna or the circuit will not interfere with each other.

[0029] In summary, the present utility model provides an NFC antenna assembly applied to an intelligent communication device. The NFC antenna assembly includes a radiation unit, a matching circuit unit electrically connected to the radiation unit, and a control unit. The control unit is electrically connected to the matching circuit unit and controls the matching circuit unit to tune the radiation unit to generate radiation. The radiation unit includes a first radiator 11, a second radiator 12, and a third radiator 2. The first radiator 11 is connected to the second radiator 12, and the third radiator 2 is coupled to the second radiator 12 and the first radiator 11 to form a closed-loop NFC antenna. The NFC antenna assembly of the present utility model can solve the problem of difficult NFC antenna design when the volume of the camera module is large, and at the same time effectively improve the induction area and radiation effect of the NFC antenna, greatly improving the user experience. That is to say, when the volume of the camera module is relatively large, the problem of difficult NFC antenna design is solved, and at the same time the overall induction area and effect of the NFC antenna are improved.

[0030] It should be noted that the various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other. In addition, the different parts among the various embodiments can also be combined and used, and the present utility model does not make any limitations in this regard.

[0031] The above description is only a description of the preferred embodiments of the present utility model, and does not limit the scope of the present utility model in any way. Any changes and modifications made by those of ordinary skill in the art of the present utility model according to the above disclosure are within the scope of protection of the claims.

Claims

1. An NFC antenna assembly, applied to a smart communication device, characterized in that: The NFC antenna assembly includes a radiating unit, a matching circuit unit electrically connected to the radiating unit, and a control unit, wherein the control unit is electrically connected to the matching circuit unit and controls the matching circuit unit to tune the radiating unit to generate radiation; the radiating unit includes a first radiator, a second radiator, and a third radiator, wherein the first radiator is connected to the second radiator, and the third radiator is coupled to the second radiator and the first radiator to form a closed-loop NFC antenna.

2. The NFC antenna assembly according to claim 1, characterized in that: The first radiator is configured as a coil and is located beside the camera module in the intelligent communication device.

3. The NFC antenna assembly according to claim 2, characterized in that: The second radiator is configured in an L-shape, surrounds the camera module, and is connected to the first radiator to semi-enclose the camera module.

4. The NFC antenna assembly according to claim 3, characterized in that: The third radiator is configured as a strip-shaped rectangular radiator, and the third radiator is located above the camera module and is coupled to the first radiator and the second radiator.

5. The NFC antenna assembly according to claim 4, characterized in that: A first electrical connection point is provided at the end position of the first radiator, a second electrical grounding point is provided at the end position of the second radiator, a third electrical connection point is provided at one end of the third radiator close to the first electrical connection point, and a fourth electrical connection point is provided at one end of the third radiator close to the second electrical connection point.

6. The NFC antenna assembly according to claim 5, characterized in that: The third radiator is further provided with a fifth electrical connection point and a sixth electrical connection point, and the third radiator is configured as an ultra-high frequency antenna radiator.

7. The NFC antenna assembly according to claim 6, characterized in that: The first radiator is connected to the matching circuit unit via the first electrical connection point, a first isolation electronic component is provided between the second radiator and the third radiator, and a second isolation electronic component is provided between the third radiator and the matching circuit unit.

8. The NFC antenna assembly according to claim 7, characterized in that: The third electrical connection point and the fourth electrical connection point of the third radiator are respectively connected to the first isolated electronic component and the second isolated electronic component; one end of the first isolated electronic component is connected to the third electrical connection point, and the other end is connected to the matching circuit unit; one end of the second isolated electronic component is connected to the fourth electrical connection point, and the other end is connected to the second radiator.

9. The NFC antenna assembly according to claim 8, characterized in that: The first isolation electronic component and the second isolation electronic component are both configured as isolation resistors.

10. An intelligent communication device, characterized in that: The intelligent communication device comprises the NFC antenna assembly according to any one of claims 1 to 9.

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