Device host of smart wearable device and smart wearable device

Abstract

This application relates to the field of smart wearable technology, and discloses a device host and a smart wearable device. The device host is worn on the arm. The device host includes: an antenna assembly comprising a first antenna and a second antenna. The first antenna includes a signal feed point and a ground feed point, and the second antenna is connected to the signal feed point. A metal base plate is connected to the antenna assembly, and the metal base plate includes a coupling slot. The coupling slot can form a coupling branch with the first antenna, the second antenna, and the arm. The coupling branch is used to generate a specified frequency; wherein the specified frequency range is 600MHz to 1GHz. The smart wearable device provided in this application can broaden the bandwidth of the smart wearable device through the coupling of the first antenna, the second antenna, and the coupling slot, thereby achieving roaming frequency band performance coverage.

Description

Technical Field

[0001] This application relates to the field of smart wearable technology, and in particular to a device host and a smart wearable device. Background Technology

[0002] In smart wearable devices, the antenna is one of the key structures. As the application scenarios for smart wearable devices become more diverse, antenna design in smart wearable devices is becoming more challenging.

[0003] For example, in today's globalized world, international travel has become a part of many people's lives. However, different countries have different communication frequency bands, which places higher demands on the antenna frequency band coverage capabilities of smart wearable devices. Existing antenna designs struggle to cover important communication frequency bands in other countries, especially low-frequency bands. Furthermore, the typically small size of smart wearable devices makes low-frequency band coverage even more challenging. Summary of the Invention

[0004] This application discloses a device host for a smart wearable device and a smart wearable device that can broaden the frequency coverage range of the smart wearable device to ensure that the communication function of the smart wearable device can be used normally abroad.

[0005] To achieve the above objectives, this application discloses a device host for a smart wearable device. The device host is worn on the arm and includes: an antenna assembly comprising a first antenna and a second antenna, the first antenna including a signal feed point and a ground feed point, the second antenna connected to the signal feed point; and a metal base plate connected to the antenna assembly, the metal base plate including a coupling gap, the coupling gap being able to form a coupling branch with the first antenna, the second antenna, and the arm, the coupling branch being used to generate a specified frequency; wherein the specified frequency range is 600MHz to 1GHz.

[0006] As an alternative implementation, the metal base plate is an annular base plate.

[0007] As an optional implementation, the width d of the coupling gap along the width direction of the smart wearable device satisfies: 1mm < d < 3mm.

[0008] As an optional implementation, the device host further includes: a rotating shaft disposed at one end of the metal base plate; a middle frame rotatably connected to the rotating shaft; and a second antenna disposed on the inner wall of the middle frame, the second antenna being located inside the middle frame on the side near the rotating shaft.

[0009] As an alternative implementation, the middle frame has an upper surface away from the metal base plate, and the first antenna includes a first sub-segment disposed on the upper surface of the middle frame and a second sub-segment disposed on the inner sidewall of the middle frame. The first sub-segment and the second sub-segment are connected, and the first sub-segment is connected to the signal feed point and the ground feed point. The second antenna is disposed close to the first sub-segment of the first antenna.

[0010] As an optional implementation, the metal base plate includes a connecting portion located on one side of the rotating shaft and a coupling portion connected to the connecting portion, wherein the coupling gap is disposed on the side of the coupling portion away from the first antenna and the second antenna along the length direction of the device host.

[0011] As an alternative implementation, the coupling gap and the signal feed point are located on the same side along the length of the device host.

[0012] As an alternative implementation, the metal base plate is disposed on the bottom surface of the middle frame, and the metal base plate is used to contact the arm.

[0013] As an alternative implementation, the first antenna is used to generate a first frequency, and the antenna assembly further includes a frequency modulation switch disposed at the ground feed point, the frequency modulation switch being used to enable the first antenna to generate a second frequency, wherein the first frequency and the second frequency are different frequencies.

[0014] As an optional implementation, the second antenna is used to generate a third frequency; the first frequency has a frequency range of 800MHz to 960MHz, the second frequency has a frequency range of 1700MHz to 2700MHz, the third frequency has a frequency range of 550MHz to 650MHz, and the designated frequency has a frequency range of 700MHz to 800MHz.

[0015] A second aspect of this application provides a smart wearable device, including the device host provided in the first aspect.

[0016] Compared with the prior art, the beneficial effects of this application are:

[0017] The device host of the smart wearable device provided in this application embodiment can be coupled with the first antenna and the second antenna through the coupling gap on the metal base plate, which ensures the communication frequency width of the smart wearable device, so as to ensure the stability of the device host in use worldwide, realize the performance coverage of international roaming frequency bands, and thus improve the wide applicability of smart wearable devices. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the device host provided in the embodiments of this application;

[0020] Figure 2 This is a schematic diagram of the antenna assembly and metal base plate provided in the embodiments of this application;

[0021] Figure 3 This is an exploded view of the device host provided in an embodiment of this application;

[0022] Figure 4 A graph showing the efficiency comparison results of the coupling gap provided in the embodiments of this application in the experiment;

[0023] Figure 5 A comparison of scattering parameters of the coupling gap in the experiment provided in the embodiments of this application;

[0024] Figure 6 This is a schematic diagram of the internal structure of the device host provided in an embodiment of this application;

[0025] Figure 7 This is a schematic diagram of the antenna assembly provided in an embodiment of this application;

[0026] Figure 8 This is a schematic diagram of the structure of the metal base plate provided in an embodiment of this application.

[0027] Explanation of reference numerals in the attached figures:

[0028] 100-Equipment host; 1-Antenna assembly; 11-First antenna; 111-First sub-segment; 112-Second sub-segment; 12-Second antenna; 13-Signal feed point; 14-Ground feed point; 2-Metal base plate; 21-Coupling slot; 22-Connection part; 23-Coupling part; 3-Rotating shaft; 4-Middle frame. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] In this application, the terms "upper," "lower," "inner," "vertical," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0031] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0032] Furthermore, the terms "set up," "equipped with," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0033] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0034] With the rapid development of technology, wearable smart watches have gradually transformed from simple time display tools into multifunctional smart devices integrating health management, information communication, and payment functions. These smart wearable devices, with their convenience, real-time capabilities, and personalized customization, are increasingly becoming an indispensable part of daily life.

[0035] Among the many functions of smart wearable devices, wireless communication is a crucial one. As the core component for enabling wireless communication, the antenna directly affects the device's signal reception and transmission capabilities. To adapt to the communication needs of different usage scenarios, the antenna design in smart wearable devices has become increasingly complex and diverse.

[0036] In the context of globalization, international travel has become an important part of many people's lives. Differences in communication frequency bands between different countries necessitate that smart wearable devices possess excellent antenna frequency coverage capabilities to support cross-border communication.

[0037] However, existing antenna designs often struggle to cover critical communication frequency bands in some countries, especially low-frequency bands. Low-frequency communication offers advantages such as strong signal penetration and wide coverage, making it invaluable for miniaturized, low-power wearable devices like smartwatches. Due to the small size of smartwatches and limited antenna design space, achieving low-frequency coverage is extremely challenging, becoming a bottleneck restricting the global application of wearable devices.

[0038] Based on this, this application discloses a device host and a smart wearable device, which can broaden the frequency coverage of the smart wearable device to ensure the normal use of the smart wearable device's communication function abroad.

[0039] The technical solution of this application will be further described below with reference to the embodiments and accompanying drawings.

[0040] Please see Figure 1 , Figure 2 and Figure 3 , Figure 1 This is a schematic diagram of the structure of the device host provided in an embodiment of this application. Figure 2 This is a schematic diagram of the antenna assembly and metal base plate provided in an embodiment of this application. Figure 3 This is an exploded structural diagram of the device host provided in an embodiment of this application. This application discloses a device host 100 for a smart wearable device, which is worn on the arm. The device host 100 includes: an antenna assembly 1, which includes a first antenna 11 and a second antenna 12. The first antenna 11 includes a signal feed point 13 and a ground feed point 14, and the second antenna 12 is connected to the signal feed point 13; and a metal base plate 2 connected to the antenna assembly 1. The metal base plate 2 includes a coupling slot 21, which can form a coupling branch with the first antenna 11, the second antenna 12, and the arm. The coupling branch is used to generate a specified frequency; wherein the specified frequency range is 600MHz to 1GHz.

[0041] It is understood that the smart wearable device in the embodiments of this application can be a smart watch, smart bracelet, or other smart device that can be worn on the human arm.

[0042] Because these smart wearable devices are small in size, the lower the frequency band used in the design and manufacturing process, the greater the challenge. This is mainly because low-frequency signals have longer wavelengths, requiring longer antennas to receive and transmit signals. In this embodiment, the coupling gap 21 on the metal base plate 2 forms a coupling branch with the first antenna 11, the second antenna 12, and the arm, enabling low-frequency band coverage while maintaining the miniaturization of the smart wearable device.

[0043] Specifically, the first antenna 11 is equipped with a signal feed point 13 and a ground feed point 14 to ensure accurate signal transmission and reception, and reduce signal reflection and loss. The signal feed point 13 is the connection point between the antenna and the radio frequency transmission line. The main function of the signal feed point 13 includes efficiently converting the electromagnetic wave signal captured by the antenna into a radio frequency signal and transmitting it to the radio frequency circuit system for processing. In addition, the signal feed point 13 can also resist interference. By taking shielding measures, signal leakage and external interference can be prevented, further ensuring the stability and reliability of communication.

[0044] Optionally, in order to ensure effective signal transmission, impedance matching can be performed at the signal feed point 13 to reduce signal reflection and loss, thereby improving the overall performance of the communication system.

[0045] Furthermore, ground feed point 14 is used for grounding. Grounding is a reference potential point or ground plane in the antenna system. Ground feed point 14 provides a stable potential reference, which helps to reduce noise and interference, and also plays an important role in the radiation characteristics and impedance matching of the antenna.

[0046] The main body of the device also includes a second antenna 12, which is connected to the signal feed point 13 of the first antenna 11. Optionally, the second antenna 12 can be connected to the first antenna 11 and connected to the signal feed point 13 through the first antenna 11, or it can be directly connected to the signal feed point 13.

[0047] The metal base plate 2 not only serves as a structural support for the main unit of the device, but also forms a coupling branch with the antenna assembly 1 and the wearer's arm through the coupling gap 21 on the metal base plate 2. Figure 4 and Figure 5 The experimental data can show the frequency range of the coupling slot 21 extension and the efficiency of antenna signal transmission. Figure 4 A graph showing the efficiency comparison results of the coupling gap provided in the embodiments of this application in the experiment; Figure 5 The diagram shows a comparison of scattering parameters of the coupling slot provided in this embodiment of the application during the experiment. The coupling branch including the coupling slot 21 can generate a specified frequency, thereby expanding the communication range and flexibility of smart wearable devices.

[0048] Optionally, the first antenna 11 can generate a first frequency, the second antenna 12 can generate a second frequency, and the specified frequency generated by the coupling branch can all be non-overlapping frequency ranges, so as to ensure that the smart wearable device can communicate simultaneously or separately on multiple independent frequency bands, thereby greatly improving the diversity and reliability of its communication.

[0049] The specified frequency range is 600MHz to 1GHz. This coverage range can cover the communication frequencies of most countries, enabling the device host 100 of the smart wearable device to avoid interference from the usage location, ensuring the communication stability of the device host 100 during use and the wide applicability, and achieving stable communication globally.

[0050] As an optional implementation, the first antenna 11 is used to generate a first frequency, and the antenna assembly 1 further includes a frequency modulation switch, which is disposed at the ground feed point 14 and is used to enable the first antenna 11 to generate a second frequency, wherein the first frequency and the second frequency are different frequencies.

[0051] The first antenna 11 generates a signal at a first frequency to meet the communication requirements of the smart wearable device at that frequency. A frequency modulation switch is located at the ground feed point 14 to change the impedance characteristics of the ground feed point 14, thereby guiding the first antenna 11 to generate signals at different frequencies. By switching the frequency modulation switch, the first antenna 11 can generate a signal at a second frequency, enabling multi-band communication.

[0052] Specifically, when the smart wearable device needs to communicate in the first frequency band, the frequency modulation switch remains in the off state, and the first antenna 11 generates a signal at the first frequency; when the smart wearable device needs to communicate in the second frequency band, the frequency modulation switch is switched to the on state, changing the impedance characteristics of the ground feed point 14, and guiding the first antenna 11 to generate a signal at the second frequency.

[0053] As an optional implementation, the second antenna 12 is used to generate a third frequency; the first frequency has a frequency range of 800MHz to 960MHz, the second frequency has a frequency range of 1700MHz to 2700MHz, the third frequency has a frequency range of 550MHz to 650MHz, and the specified frequency has a frequency range of 700MHz to 800MHz.

[0054] The first frequency is used for certain bands in mobile communications, such as GSM and 2G and 3G networks. The second frequency is used for modern mobile communications, especially 3G and 4G LTE networks. The second frequency also supports wireless LAN technologies, especially in situations where the 2.4GHz band is congested, the bands near 2.5GHz can serve as an alternative. The third frequency is used in many countries and regions for the expansion of mobile communications, particularly 4G and 5G networks. Designated frequencies are used to cover important communication bands in some other countries.

[0055] Furthermore, the main unit 100 of the smart wearable device fully considers human body adaptability. By incorporating the wearer's arm as part of the first coupling branch, the smart wearable device can better conform to the human body, improving the stability and efficiency of communication.

[0056] Thus, the device host 100 of the smart wearable device provided in this application embodiment can be coupled with the first antenna 11 and the second antenna 12 through the coupling gap 21 on the metal base plate 2, ensuring the communication frequency width of the smart wearable device, so as to ensure the stability of the device host 100 of the smart wearable device in use worldwide, realize the performance coverage of international roaming frequency bands, and thereby improve the wide applicability of smart wearable devices.

[0057] Please see Figure 6 , Figure 6 This is a schematic diagram of the internal structure of the device host provided in an embodiment of this application. In one embodiment, the metal base plate 2 is an annular base plate. It can be understood that the metal base plate 2, as the basic part of the device host 100, typically has good mechanical properties and stability, and can withstand certain external forces and impacts to ensure the stability and durability of the device during wear and use.

[0058] Furthermore, the annular metal base plate 2 can form a coupling branch with the antenna assembly 1, which helps to optimize the antenna performance. By adjusting the structure of the annular metal base plate 2, parameters such as the antenna frequency can be adjusted, thereby improving the communication performance of smart wearable devices.

[0059] Furthermore, the annular metal base plate 2 serves as an electromagnetic shielding layer, effectively blocking external electromagnetic interference from affecting the internal electronic components of the device. Simultaneously, the annular structure prevents electromagnetic waves from leaking from the smart wearable device into the external environment, reducing interference with surrounding equipment.

[0060] In one embodiment, the width d of the coupling gap 21 along the width direction of the smart wearable device satisfies: 1mm < d < 3mm.

[0061] Specifically, when d is greater than 1 mm, the coupling gap 21 can be guaranteed to have a certain width, thereby allowing sufficient electromagnetic waves to pass through and forming a good coupling effect. If d is less than 1 mm, the coupling effect may be poor, affecting the communication performance of smart wearable devices.

[0062] Meanwhile, when d is less than 3mm, the width of the coupling gap 21 can be limited, preventing excessive electromagnetic wave leakage into the external environment and reducing the impact of external electromagnetic interference on the internal electronic components of the smart wearable device. If d is greater than 3mm, it may lead to excessive electromagnetic wave leakage, reducing the electromagnetic compatibility of the smart wearable device.

[0063] Please see Figure 6 and Figure 2As an optional implementation, the device host 100 further includes: a rotating shaft 3, which is disposed at one end of the metal base plate 2; a middle frame 4, which is rotatably connected to the rotating shaft 3; and a second antenna 12 disposed on the inner wall of the middle frame 4, which is located on the side of the middle frame 4 near the rotating shaft 3.

[0064] The pivot 3 is located at one end of the metal base plate 2, which allows the middle frame 4 to rotate or flip relative to the metal base plate 2, so that the device host 100 of the smart wearable device can have more usage forms and functions, such as flipping the screen to display more information or perform interactive operations.

[0065] Optionally, the pivot 3 can be detachably mounted on the metal base plate 2 via a snap-fit ​​structure or other means, thereby allowing the middle frame 4 to be separated from the metal base plate 2, adding more methods and forms for the use of smart wearable devices.

[0066] The mid-frame 4 is an important component of smart wearable devices. It not only provides structural support but also protects the antennas and electronic components inside the smart wearable device from damage.

[0067] The second antenna 12 is disposed on the inner wall of the middle frame 4 and located on the side of the middle frame 4 near the rotating shaft 3, thereby making full use of the space inside the middle frame 4 and making the layout of the antenna assembly 1 and other electronic components inside the middle frame 4 more reasonable, so as to ensure the miniaturization of the device host 100.

[0068] Meanwhile, since the material of the pivot 3 is metal, it may affect the performance of the second antenna 12. The second antenna 12 is positioned close to the pivot 3 to couple with the pivot 3, thereby reducing the impact of the pivot 3 on the second antenna 12 and ensuring the performance and working efficiency of the second antenna 12.

[0069] Optionally, the main unit 100 of the smart wearable device also includes a display screen and a back cover, with openings at both ends of the middle frame 4, the back cover being connected to the middle frame 4 and covering the lower opening of the middle frame 4, and the display screen being connected to the middle frame 4 and covering the upper opening of the middle frame 4.

[0070] The main unit 100 of the smart wearable device includes a display screen, a back cover, and a mid-frame 4. The mid-frame 4 has openings at both ends to facilitate easy connection between the display screen and the back cover, and to respectively cover the upper and lower openings of the mid-frame 4. The display screen provides image display and touch operation experience. The back cover primarily protects the internal electronic components of the device from damage caused by the external environment.

[0071] The rear shell and the middle frame 4 are detachably connected so that the rear shell can be separated from the middle frame 4. This allows for convenient replacement and repair of electronic components and antenna assembly 1 inside the middle frame 4 when maintenance or replacement is required.

[0072] Please see Figure 7 , Figure 7 The diagram below shows the structure of the antenna assembly provided in an embodiment of this application. In one embodiment, the middle frame 4 has an upper surface away from the metal base plate 2. The first antenna 11 includes a first segment 111 disposed on the upper surface of the middle frame 4 and a second segment 112 disposed on the inner sidewall of the middle frame 4. The first segment 111 and the second segment 112 are connected. The first segment 111 is connected to the signal feed point 13 and the ground feed point 14. The second antenna 12 is disposed close to the first segment 111 of the first antenna 11.

[0073] Specifically, the first segment 111 is located on the upper surface of the middle frame 4, connecting the signal feed point 13 and the ground feed point 14, and is the main part of the antenna for receiving and transmitting signals. By rationally designing the length, width, and shape of the first segment 111, the performance of the first antenna 11 can be optimized, and the communication stability and efficiency of the smart wearable device can be improved.

[0074] The second sub-segment 112 is located on the inner sidewall of the middle frame 4 and is connected to the first sub-segment 111. The second sub-segment 112 serves as a transition and support, helping the first antenna 11 to better adapt to the structure of the smart wearable device. At the same time, the second sub-segment 112 can provide different functions than the first sub-segment 111 to ensure the versatility of the first antenna 11's functions.

[0075] The second antenna 12 is positioned close to the first segment 111 of the first antenna 11, which can create a certain coupling effect and thus optimize the antenna performance. In addition, the second antenna 12 being positioned close to the first segment 111 of the first antenna 11 can also reduce interference between the first antenna 11 and the second antenna 12, and improve the communication stability of smart wearable devices.

[0076] Optionally, by appropriately designing the length, width, and shape of the second antenna 12, multi-band communication can be achieved. This allows the equipment to adapt to the communication standards of different countries and regions, improving the breadth and flexibility of communication.

[0077] Please see Figure 8 , Figure 8 This is a schematic diagram of the structure of the metal base plate provided in an embodiment of this application. As an optional implementation, the metal base plate 2 includes a connecting portion 22 located on one side of the rotating shaft 3, and a coupling portion 23 connected to the connecting portion 22. The coupling gap 21 is disposed on the side of the coupling portion 23 away from the first antenna 11 and the second antenna 12 along the length direction of the device host 100.

[0078] The metal base plate 2 includes a connecting part 22 located on one side of the rotating shaft 3 and a coupling part 23 connected to the connecting part 22. The connecting part 22 is located on one side of the rotating shaft 3 and is used to connect the metal base plate 2 to the rotating shaft 3, so that the metal base plate 2 is connected to the middle frame 4 through the rotating shaft 3.

[0079] Optionally, the connection between the connecting part 22 and the rotating shaft 3 can be achieved by screws, clips or other fastening methods to ensure the overall stability and durability of the equipment.

[0080] The coupling part 23 is connected to the connecting part 22, and a coupling slot 21 is provided on the side away from the first antenna 11 and the second antenna 12 along the length direction of the device host 100. The coupling slot 21's distance from the first antenna 11 and the second antenna 12 reduces interference between the first antenna 11, the second antenna 12, and the coupling slot 21, improving the communication performance of the smart wearable device. Simultaneously, the distance of the coupling slot 21 from the first antenna 11 and the second antenna 12 does not affect its function as part of the coupling branch, allowing it to work together with the first antenna 11 and the second antenna 12 to achieve multi-band communication and wider communication coverage.

[0081] Please see Figure 2 In one embodiment, the coupling slot 21 and the signal feed point 13 are located on the same side along the length of the device host 100. Specifically, the frequency range that the coupling branch can provide varies depending on the location of the coupling slot 21. The fact that the coupling slot 21 and the signal feed point 13 are located on the same side helps to reduce signal loss and interference during signal transmission, enabling the signal to be transmitted to the first antenna 11 more directly and efficiently, thereby improving the receiving and transmitting efficiency of the first antenna 11.

[0082] Meanwhile, having the coupling slot 21 and the signal feed point 13 on the same side ensures the frequency range provided by the coupling slot 21 and improves the operating efficiency of the coupling slot 21 and the coupling branch, thereby guaranteeing the efficiency of signal transmission. Furthermore, having the coupling slot 21 and the signal feed point 13 on the same side also simplifies the internal structure of the equipment, reduces manufacturing costs, and improves production efficiency.

[0083] In one embodiment, a metal base plate 2 is disposed on the bottom surface of the middle frame 4. The metal base plate 2 is used to contact the arm, so that the coupling gap 21 on the metal base plate 2 can be coupled with the first antenna 11, the second antenna 12 and the wearer's arm, ensuring the stability of the specified frequency.

[0084] Specifically, the arm is made of a high-loss, high-dielectric-constant material, and the metal base plate 2 is placed near the arm end. Its impact on the coupling branch is twofold. First, the high dielectric constant of the arm affects the coupling branch. When the metal base plate 2 is close to the arm, the arm's high dielectric constant exerts a pulling effect on electrons in the coupling branch. This pulling effect guides electrons from the inside to the outside of the coupling branch, thereby enhancing the radiation capability of the coupling branch. This improves the signal strength and stability of the smart wearable device during communication, enabling the smart wearable device to better receive and transmit electromagnetic wave signals.

[0085] Secondly, the high loss characteristics of the arm also affect the coupling branch. At higher frequencies, the arm experiences greater dielectric loss, which negatively impacts the performance of the coupling branch. However, at lower frequencies, the arm's loss is less significant. This loss characteristic is related to the wavelength of the electromagnetic wave, as electromagnetic waves of different frequencies propagate differently in a medium. Therefore, placing the low-frequency coupling branch at the bottom of the smart wearable device, close to the arm, can improve its radiation efficiency. This allows the smart wearable device to achieve better performance in low-frequency communication.

[0086] Furthermore, the fact that the metal base plate 2 directly contacts the arm reflects the human-centered design considerations of smart wearable devices. Optionally, to ensure wearing comfort and safety, a skin-friendly, hypoallergenic protective layer, such as rubber or plastic, can be applied to the outside of the metal base plate 2 to reduce skin irritation and discomfort. In addition, the shape, size, and curvature of the metal base plate 2 can be adjusted to accommodate the wearing needs of different users and the differences in arm shape, thereby providing a more comfortable wearing experience.

[0087] The second aspect of this application provides a smart wearable device, including the device host 100 provided in the first aspect.

[0088] Since the smart wearable device provided in this application includes the device host 100 of the smart wearable device provided in the first aspect embodiment of this application, the smart wearable has the beneficial effects of any of the aforementioned device hosts 100, which will not be repeated here.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A device host for a smart wearable device, the device host being worn on the arm, characterized in that, The device host includes: An antenna assembly, comprising a first antenna and a second antenna, wherein the first antenna includes a signal feed point and a ground feed point, and the second antenna is connected to the signal feed point; A metal base plate is connected to the antenna assembly. The metal base plate includes a coupling slot that can form a coupling branch with the first antenna, the second antenna, and the arm. The coupling branch is used to generate a specified frequency. The specified frequency range is 600MHz to 1GHz.

2. The device host according to claim 1, characterized in that, The metal base plate is an annular base plate.

3. The device host according to claim 1, characterized in that, The width d of the coupling gap along the width direction of the smart wearable device satisfies: 1mm < d < 3mm.

4. The device host according to claim 1, characterized in that, The device host also includes: A rotating shaft is disposed at one end of the metal base plate; The middle frame is rotatably connected to the pivot, and the second antenna is disposed on the inner wall of the middle frame, located on the side of the middle frame near the pivot.

5. The device host according to claim 4, characterized in that, The middle frame has an upper surface away from the metal base plate. The first antenna includes a first sub-segment disposed on the upper surface of the middle frame and a second sub-segment disposed on the inner sidewall of the middle frame. The first sub-segment is connected to the second sub-segment and the first sub-segment is connected to the signal feed point and the ground feed point. The second antenna is positioned close to the first sub-segment of the first antenna.

6. The device host according to claim 4, characterized in that, The metal base plate includes a connecting part located on one side of the rotating shaft and a coupling part connected to the connecting part. The coupling gap is located on the side of the coupling part away from the first antenna and the second antenna along the length direction of the device host.

7. The device host according to claim 6, characterized in that, Along the length of the device host, the coupling gap and the signal feed point are located on the same side.

8. The device host according to claim 4, characterized in that, The metal base plate is disposed on the bottom surface of the middle frame, and the metal base plate is used to contact the arm.

9. The host device according to any one of claims 1 to 8, characterized in that, The first antenna is used to generate a first frequency, and the antenna assembly further includes: A frequency modulation switch is provided at the ground feed point. The frequency modulation switch is used to enable the first antenna to generate a second frequency, wherein the first frequency and the second frequency are different frequencies.

10. The device host according to claim 9, characterized in that, The second antenna is used to generate the third frequency; The first frequency has a frequency range of 800MHz to 960MHz, the second frequency has a frequency range of 1700MHz to 2700MHz, the third frequency has a frequency range of 550MHz to 650MHz, and the specified frequency has a frequency range of 700MHz to 800MHz.

11. A smart wearable device, characterized in that, Includes the device host as described in any one of claims 1-10.

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