Antenna assembly and wearable device

Abstract

The embodiment of the utility model provides an antenna assembly and a wearable device, the antenna assembly comprises an antenna main body, a printed circuit board and a metal bezel arranged on a shell of the wearable device, the metal bezel is coupled with the antenna main body to form a circular polarization radiation structure, the antenna main body is connected with a feeding point on the printed circuit board, and the printed circuit board is connected with the metal bezel. And the antenna main body is manufactured through a PDS printing process to form a three-dimensional structure. According to the antenna assembly provided by the utility model, through the coupling design of the metal bezel and the antenna and the PDS printing technology, the antenna performance bottleneck of a miniaturized terminal is broken through, and the radio frequency performance of the antenna is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of radio frequency, especially relates to an antenna assembly and wearable equipment. BACKGROUND

[0002] With the rapid popularization of intelligent terminal equipment (such as smart phone, smart watch, smart bracelet etc.), satellite positioning function has become one of its core requirements.Signal transmission of satellite positioning system depends on efficient antenna design, and circularly polarized antenna becomes the ideal choice in satellite communication field because of its advantages in signal penetration ability, coverage range and anti-interference performance.However, in small-sized terminal such as intelligent wearable equipment, application of traditional circularly polarized antenna faces significant challenge due to compact industrial design and limited internal space.

[0003] In prior art, linearly polarized antenna is mostly used in intelligent terminal to realize satellite signal reception.Although linearly polarized antenna has simple structure, its polarization direction is mismatched with circularly polarized signal transmitted by satellite, resulting in low signal reception efficiency and insufficient positioning accuracy, especially in complex environment (such as urban canyon or indoor) performance is further deteriorated.In addition, to adapt to the miniaturization trend of terminal equipment, design space of antenna is continuously compressed, and traditional antenna (such as microstrip antenna) needs to occupy larger clearance area, which is difficult to meet the demand of compact layout of modern intelligent wearable equipment.Although part of technology attempts to optimize antenna structure through flexible circuit board (FPC) or laser direct forming (LDS) process, these schemes still have problems such as poor process consistency, low yield and high cost.

[0004] In view of the above problems, an antenna design scheme capable of realizing high-performance circularly polarized radiation in limited space is urgently needed, while stability of manufacturing process and cost benefit are also considered. UTILITY MODEL CONTENT

[0005] The utility model embodiment provides a kind of antenna assembly and wearable equipment, by the coupling design of metal bezel and antenna, in combination with PDS printing process, break through the antenna performance bottleneck of small-sized terminal, improve the radio frequency performance of antenna.

[0006] The utility model embodiment provides a kind of antenna, applied to wearable equipment, including antenna main body, printed circuit board and the metal bezel of being set on the wearable equipment shell;

[0007] The metal bezel is coupled with the antenna main body to form a circularly polarized radiation structure;

[0008] The antenna main body is connected to the feed point on the printed circuit board, and the antenna main body is made by PDS printing process, forming a three-dimensional structure.

[0009] In an embodiment, the coupling gap between the metal bezel and the antenna body is 0.1mm to 2mm.

[0010] In an embodiment, the antenna body comprises a multi-segment bending structure, and the bending angle is 90°.

[0011] In an embodiment, the antenna body is a inverted-F structure or a spiral structure, and the length of the antenna body is configured as 1 / 4 wavelength of the working frequency band.

[0012] In an embodiment, the metal bezel is a ring-shaped closed structure, and the circumference of the metal bezel is in proportional relationship with the wavelength of the working frequency band.

[0013] In an embodiment, the thickness of the antenna body is 0.005mm to 0.015mm.

[0014] In an embodiment, the antenna body is an arc-shaped structure, and the curvature of the antenna body is the same as the curvature of the metal bezel.

[0015] In an embodiment, the ratio of the length of the antenna body to the circumference of the metal bezel is 1:3 to 1:5.

[0016] Correspondingly, the utility model embodiment further provides a wearable device, the wearable device comprises a shell and an antenna assembly, the antenna assembly comprises an antenna body, a printed circuit board and a metal bezel arranged on the wearable device shell;

[0017] The metal bezel is coupled with the antenna body to form a circularly polarized radiation structure.

[0018] The antenna body is connected to a feeding point on the printed circuit board, and the antenna body is made by a PDS printing process to form a three-dimensional structure.

[0019] In an embodiment, the shell comprises a bottom shell and a side wall, and the antenna body is formed on the inner side of the side wall.

[0020] The antenna assembly and the wearable device provided by the utility model embodiment, the antenna assembly comprises an antenna body, a printed circuit board and a metal bezel arranged on the wearable device shell, the metal bezel is coupled with the antenna body to form a circularly polarized radiation structure, the antenna body is connected to a feeding point on the printed circuit board, and the antenna body is made by a PDS printing process to form a three-dimensional structure. The antenna assembly provided by the utility model breaks through the antenna performance bottleneck of a small-sized terminal by the coupling design of the metal bezel and the antenna and the PDS printing process, and improves the radio frequency performance of the antenna. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0022] Figure 1 is a structural schematic diagram of an antenna assembly provided by the embodiments of the present application.

[0023] Figure 2 is a structural schematic diagram of a wearable device provided by the embodiments of the present application. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0025] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0026] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, the term "set", "connect", "connection" should be broad sense understanding, for example, it can be fixed connection, also can be detachable connection, or integrally connected;It can be mechanical connection, also can be electrical connection or can communicate with each other;It can be directly connected, also can be indirectly connected through intermediate medium, it can be the communication of two elements or the interaction of two elements.For ordinary skilled in the art, the above-mentioned terms can be understood according to the specific meaning of the utility model.

[0027] In the utility model, unless another explicit provision and limitation, the first feature is "on" or "under" the second feature can include the first and second features direct contact, also can include the first and second features are not direct contact but contact through another feature between them.Moreover, the first feature is "on", "above" and "on" the second feature includes the first feature is directly above and obliquely above the second feature, or just indicates that the first feature is higher than the second feature in horizontal height.The first feature is "under", "below" and "under" the second feature includes the first feature is directly below and obliquely below the second feature, or just indicates that the first feature is less than the second feature in horizontal height.

[0028] The following disclosure provides many different embodiments or examples for implementing different structures of the utility model.For the purpose of simplifying the disclosure of the utility model, the components and settings of specific examples are described in the following text.Of course, they are only examples, and the purpose is not to limit the utility model.In addition, the utility model can repeatedly refer to numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed.In addition, the utility model provides various specific examples of processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0029] The utility model embodiment provides a kind of antenna.As shown in Figure 1 Metal bezel 13 and antenna main body 11 are coupled to form a circularly polarized radiation structure, antenna main body 11 is connected to the feed point on printed circuit board 12, and antenna main body 11 is made by PDS printing process to form a three-dimensional structure.

[0030] In an embodiment, the antenna body 11 can include an antenna feed point 111 and a grounding point 112. The grounding point 112 is connected to the printed circuit board 12 for grounding to ensure the stability of the electrical performance of the antenna. The antenna feed point 111 is used to connect to the radio frequency circuit of the printed circuit board 102. The grounding point 112 described above can be fixedly connected to the reference ground of the whole machine by welding. The grounding point 112 described above can also be fixedly connected to the reference ground of the whole machine by screw locking. In other embodiments, the grounding point 112 described above can also be connected to the reference ground of the whole machine by a connecting wire, which is not limited by the present application.

[0031] In an embodiment, the metal bezel 13 and the antenna body 11 form a circularly polarized radiation structure through electromagnetic coupling, and the coupling gap between them is designed to be 0.1mm to 2mm (preferably 0.5mm-1.5mm). By adjusting the gap size, the axial ratio (AR) and the radiation efficiency can be optimized to meet the reception requirements of satellite positioning signals.

[0032] In an embodiment, the antenna body 11 can be a inverted-F structure or a spiral structure. The inverted-F antenna body is composed of multiple bending structures, the bending angle is 90°, and the total length is configured as 1 / 4 wavelength of the working frequency band (for example, GPS L1 frequency band 1575.42MHz). The spiral antenna body is formed by continuous spiral bending to form a compact layout, which is suitable for the arc-shaped shell of wearable devices.

[0033] The thickness of the antenna body 11 is controlled to be 0.005mm-0.015mm to balance flexibility and radiation performance. The ratio of the length of the antenna body 11 to the circumference of the metal bezel 13 is 1:3 to 1:5. For example, when the circumference of the metal bezel is 60mm, the length of the antenna body is designed to be 12mm-20mm to reduce the occupied area and improve the coupling efficiency.

[0034] In an embodiment, the metal bezel 13 is a ring-shaped closed structure, and the material thereof is preferably stainless steel or aluminum alloy, and the surface is treated by oxidation. The oxidation treatment (such as anodic oxidation) of the metal bezel 13 can reduce the surface impedance and reduce signal attenuation. The circumference of the metal bezel 13 is in proportional relationship with the wavelength of the working frequency band. For example, under the GPS L1 frequency band, the circumference of the metal bezel is designed to be an integer multiple (such as 1 times or 2 times) of the wavelength to enhance the resonance effect. The antenna body 11 is electromagnetically coupled to the metal bezel 13 through the bending structure to generate circularly polarized radiation waves, which effectively receive satellite signals.

[0035] In an embodiment, the antenna body 11 is an arc structure, and the curvature is strictly matched with the radius of curvature of the metal bezel 13. The antenna body 11 is printed with a conductive material in a specified area of the printed circuit board 12 or the side wall of the shell by using a PDS (Precision Direct Structuring) printing process to form a high-precision antenna pattern. The process avoids manual errors in the traditional mounting process, and at the same time enables the three-dimensional structure (such as bending or spiral) of the antenna body 11 to perfectly match the curvature of the shell, thereby improving assembly consistency.

[0036] The embodiment of the present application also provides a wearable device, as shown in the figure, which can be a smart watch and includes a shell 1 and a watchband 2. In addition, a cover plate 3 can be arranged on the surface of the shell 1. Figure 2

[0037] The shell 1 is used to form the external contour of the wearable device, so as to accommodate electronic devices, functional components and the like of the wearable device, and at the same time forms a sealing and protection effect on the electronic devices and functional components inside the wearable device. For example, the camera, circuit board and vibration motor of the wearable device can be arranged inside the shell 1.

[0038] In an embodiment, the shell 1 can further include a bottom shell and a side wall, and the bottom shell and the side wall can form a receiving space. Correspondingly, the wearable device can further include a display screen arranged inside the side wall and used to display images, texts and the like. The display screen can include a liquid crystal display (LCD) or an organic light-emitting diode display (OLED) or the like. A cover plate can be arranged on the display screen to cover the display screen. The cover plate can be a transparent glass cover plate, so that the display screen can display through the cover plate. In some embodiments, the cover plate can be a glass cover plate made of sapphire or the like.

[0039] In addition, a pine tree antenna assembly can be embedded in the shell, and an antenna body can be directly printed on the inner side surface of the side wall by using a PDS printing process. The metal bezel is used as an outer edge part of the shell, and the curvature of the metal bezel is consistent with the curvature of the antenna body, thereby forming a seamless integrated design.

[0040] The embodiment realizes miniaturization of a circularly polarized antenna of a smart wearable device by using the coupling design of the metal bezel and the antenna and combining the PDS printing process. The compact structure, high assembly consistency and excellent axial ratio performance of the embodiment significantly improve the satellite positioning accuracy and signal reception stability, and at the same time reduce the process cost and the failure rate.

[0041] ​The utility model provides a kind of antenna assembly and wearable equipment, antenna assembly includes antenna main body, printed circuit board and the metal bezel being set on wearable equipment shell, metal bezel is coupled with antenna main body, to form circular polarization radiation structure, antenna main body connects the feed point on printed circuit board, and antenna main body is made by PDS printing process, forms three-dimensional structure.The utility model provides antenna assembly by the coupling design of metal bezel and antenna, in combination with PDS printing process, break through the antenna performance bottleneck of miniaturization terminal, improve the radio frequency performance of antenna.

[0042] The above detailed description of the antenna assembly and wearable device provided by the embodiments of the present utility model, the principles and implementation modes of the present utility model are described by applying specific examples. The above examples are only used to help understand the present utility model. Meanwhile, for those skilled in the art, according to the idea of the present utility model, the specific implementation mode and application range will be changed. In conclusion, the content of the specification should not be understood as a limitation of the present utility model.

Claims

1. An antenna assembly applied to a wearable device, characterized in that, The wearable device comprises a shell and an antenna assembly, the antenna assembly comprises an antenna body, a printed circuit board and a metal bezel arranged on the wearable device shell; The metal bezel is coupled with the antenna body to form a circularly polarized radiation structure; The antenna body is connected to a feed point on the printed circuit board, and the antenna body is made by PDS printing process to form a three-dimensional structure.

2. The antenna assembly of claim 1, wherein, The coupling gap between the metal bezel and the antenna body is 0.1mm to 2mm.

3. The antenna assembly of claim 1, wherein, The antenna body comprises a plurality of bending structures, and the bending angle is 90°.

4. The antenna assembly of claim 3, wherein, The antenna body is a inverted F-shaped structure or a spiral structure, and the length of the antenna body is configured as 1 / 4 wavelength of the working frequency band.

5. The antenna assembly of claim 4, wherein, The metal bezel is a ring-shaped closed structure, and the circumference of the metal bezel is in proportional relationship with the wavelength of the working frequency band.

6. The antenna assembly of claim 1, wherein, The thickness of the antenna body is 0.005mm to 0.015mm.

7. The antenna assembly of claim 1, wherein, The antenna body is an arc structure, and the curvature of the antenna body is the same as that of the metal bezel.

8. The antenna assembly of claim 1, wherein, The ratio of the length of the antenna body to the circumference of the metal bezel is 1:3 to 1:

5.

9. A wearable device, comprising: The wearable device comprises a shell and an antenna assembly, the antenna assembly comprises an antenna body, a printed circuit board and a metal bezel arranged on the wearable device shell; The metal bezel is coupled with the antenna body to form a circularly polarized radiation structure; The antenna body is connected to a feed point on the printed circuit board, and the antenna body is made by PDS printing process to form a three-dimensional structure.

10. The wearable device of claim 9, wherein, The shell comprises a bottom shell and a side wall, and the antenna body is formed on the inner side of the side wall.

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