Watch

Abstract

The application provides a watch, and relates to the technical field of communication, and the watch comprises a watch body, an antenna arranged on the watch body, and the antenna comprises a conductive radiation part, at least one target position of the radiation part is provided with a slot-shaped area, and the slot inner part of the slot-shaped area is a non-conductive area; wherein, in the case that the antenna works, current flows along the slot-shaped area in the radiation part, and the current directions of the current along the opposite two slot walls of the slot-shaped area are opposite.

Description

Technical Field

[0001] This application relates to the field of communication technology, and more particularly to a watch. Background Technology

[0002] With the advancement of mobile communication systems, smartwatches have become increasingly versatile, offering users numerous conveniences. However, when a person approaches a smartwatch, due to the lossy nature of human organs, an induced electromagnetic field is generated within the body under the influence of an external electromagnetic field. This field generates current, absorbing and dissipating electromagnetic energy. The Specific Absorption Rate (SAR) is the ratio of electromagnetic wave energy absorbed by a mobile phone or wireless product, used to measure the actual radio radiation energy absorbed by the human body. Wearable smartwatches, with their antennas in close contact with the body, tend to have higher SAR values. Currently, SAR values ​​are reduced by lowering the antenna's transmission power; however, reducing the antenna's transmission power results in poorer signal quality. Summary of the Invention

[0003] This application provides a watch that solves the problem in the prior art where reducing the antenna's transmission power to lower the SAR value results in poor antenna signal quality.

[0004] To solve the above-mentioned technical problems, the present invention is implemented as follows:

[0005] In a first aspect, embodiments of this application provide a watch, the watch comprising:

[0006] The watch itself;

[0007] An antenna is disposed on the watch body. The antenna includes a conductive radiating portion, and at least one target position of the radiating portion is provided with a groove-shaped region. The interior of the groove-shaped region is divided into non-conductive regions.

[0008] When the antenna is in operation, current flows along the grooved region in the radiating portion, and the current flows in opposite directions along the two opposite groove walls of the grooved region.

[0009] In this embodiment, the watch includes: a watch body; and an antenna disposed on the watch body. The antenna includes a conductive radiating portion, and at least one target location of the radiating portion has a groove-shaped region. The groove of the groove-shaped region is divided into non-conductive regions. When the antenna is operational, current flows along the groove-shaped region in the radiating portion, and the current directions along the two opposite groove walls are opposite. By providing non-conductive groove-shaped regions, the current directions along the two opposite groove walls are reversed, and the radiation field values ​​of the reverse currents cancel each other out, reducing the energy absorbed by the human body and thus lowering the SAR value of the antenna. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of a watch provided in an embodiment of this application;

[0011] Figure 2 yes Figure 1 Left view of the watch shown;

[0012] Figure 3 yes Figure 1 A top view of the watch shown;

[0013] Figure 4 This is a schematic diagram of current flow provided in an embodiment of this application;

[0014] Figure 5 This is a schematic diagram of another watch structure provided in an embodiment of this application;

[0015] Figure 6 This is another schematic diagram of current flow provided in an embodiment of this application;

[0016] Figure 7 This is a schematic diagram of current distribution provided in an embodiment of this application;

[0017] Figure 8 This is another schematic diagram of current distribution provided in an embodiment of this application;

[0018] Figure 9 This is another schematic diagram of current distribution provided in an embodiment of this application;

[0019] Figure 10 This is another schematic diagram of current distribution provided in an embodiment of this application;

[0020] Figure 11 This is a schematic diagram of another watch structure provided in an embodiment of this application;

[0021] Figure 12 This is a schematic diagram of another watch structure provided in an embodiment of this application;

[0022] Figure 13 This is a schematic diagram of another watch structure provided in an embodiment of this application;

[0023] Figure 14 This is a schematic diagram of another watch structure provided in an embodiment of this application;

[0024] Figure 15 This is a schematic diagram of another watch structure provided in an embodiment of this application;

[0025] Figure 16 This is a schematic diagram of another watch structure provided in an embodiment of this application;

[0026] Figure 17 This is a schematic diagram of another watch structure provided in an embodiment of this application;

[0027] Figure 18 This is a schematic diagram of another watch structure provided in an embodiment of this application;

[0028] Figure 19 This is a schematic diagram of another watch structure provided in an embodiment of this application;

[0029] Figure 20 This is a schematic diagram of another watch structure provided in an embodiment of this application;

[0030] Figure 21 This is a schematic diagram of another watch structure provided in an embodiment of this application. Detailed Implementation

[0031] 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, 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.

[0032] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0033] The watch provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0034] like Figures 1 to 3 As shown in the figure, this application embodiment provides a watch, the watch comprising:

[0035] Watch body 1;

[0036] Antenna 2 is disposed on the watch body 1. Antenna 2 includes a conductive radiating portion 21. At least one target position 31 of the radiating portion 21 is provided with a groove-shaped region 211. The groove of the groove-shaped region 211 is divided into non-conductive regions.

[0037] When the antenna 2 is in operation, current flows along the groove region 211 in the radiating portion 21, and the current directions along the two opposite groove walls of the groove region 211 are opposite.

[0038] In addition, the conductive radiating portion 21 can be a conductive radiator.

[0039] The current flows in opposite directions along the extension directions of the two opposite groove walls of the groove region 211.

[0040] In addition, the interior of the groove-shaped region 211 is divided into non-conductive regions, so the groove-shaped region 211 can be considered as a non-conductive region, and current can flow along the edge of the groove-shaped region 211.

[0041] In addition, such as Figure 4 As shown, the grooved region 211 may include a first groove wall 2111 and a second groove wall 2112, with the first groove wall 2111 and the second groove wall 2112 facing each other; wherein, when the antenna 2 is working, the current along the extension direction of the first groove wall 2111 is opposite in direction to the current along the extension direction of the second groove wall 2112.

[0042] Additionally, the watch body 1 may include a display side 11 and a non-display side 12 opposite to the display side 11. The slot 2113 of the groove-shaped region 211 may be formed on the non-display side 12, or the slot 2113 of the groove-shaped region 211 may be formed on the display side 11. Preferably, the slot 2113 of the groove-shaped region 211 is located on the non-display side 12, so that the metal is farther away from the human body, thereby increasing the distance between the current and the human body.

[0043] Furthermore, when the antenna 2 is operating, the current flowing through the radiating portions 21 on both sides of the target position 31 is in the same direction, or the current flowing through the radiating portions 21 on both sides of the target position 31 is in opposite directions. By setting the slotted region 211 at the target position 31, which satisfies that the current flowing through the radiating portions 21 on both sides of the target position 31 is in the same direction, the SAR value can be reduced to a large extent.

[0044] Additionally, the antenna 2 may also include a grounding terminal 22 and a feed terminal 23, and the target position 31 may be located between the grounding terminal 22 and the feed terminal 23. A zero-current position 32 may exist between the grounding terminal 22 and the feed terminal 23.

[0045] In one embodiment, the antenna 2 may include a ground terminal 22 and a feed terminal 23. A zero-current position 32 exists between the ground terminal 22 and the feed terminal 23. The target position 31 may be located between the zero-current position 32 and the feed terminal 23, or the target position 31 may be located between the zero-current position 32 and the ground terminal 22. Placing the slotted region 211 between the zero-current position 32 and the feed terminal 23 can further reduce the SAR value of the antenna 2.

[0046] Furthermore, when the antenna 2 is working, the current value at the target position 31 meets a preset condition; wherein the preset condition includes at least one of the following: the current value at the target position 31 is greater than a preset threshold; the current value at the target position 31 is greater than the current value at the other positions in the radiating part 21 other than the target position 31.

[0047] Furthermore, the grooved area 211 can be the button area of ​​the watch, or the grooved area 211 and the button area of ​​the watch can be different areas.

[0048] Taking a watch-shaped terminal as an example, the structural diagram of antenna 2 is as follows: Figure 5As shown. The antenna 2 of this watch-shaped terminal uses the metal structural components and motherboard connected within the watch core as the ground plane 24, and the metal watch case as the radiating part 21. The radiating part 21 can also be called a radiator. There is an intermediate part 25 between the ground plane 24 and the radiating part 21. This intermediate part 25 can be a gap or an insulating filler. The antenna 2 of this watch-shaped terminal generally has multiple feed terminals 23 (i.e., feed positions) for transmitting and receiving signals such as Long Term Evolution (LTE), Global Positioning System (GPS), and Bluetooth. For example, F1 is the feed position (i.e., feed terminal 23) for signal types that require SAR reduction, F2 is the feed position for other signal types, and GND represents the antenna ground position (i.e., ground terminal 22). The antenna 2 of this watch-shaped terminal can also be provided with a switch or a parallel point of centralized components, etc., but this embodiment does not limit this. The feed terminal 23 can also be called a feed point.

[0049] in addition, Figure 5 The antenna current distribution for a typical high-SAR band LTE B1 is presented. The current distribution consists of two sets of 1 / 2 slot patterns, one clockwise and one counterclockwise, from the feed position F1 to the ground terminal GND. The current characteristics of the 1 / 2 slot pattern are as follows: the current from the feed terminal 23 to the ground terminal GND is divided into two segments with opposite directions, and there is a current zero point position 32 between the two segments.

[0050] In this embodiment, at points with strong currents on both sides where the current directions are the same, a portion of the metal is replaced with insulating material. These points with strong currents are as follows: Figure 5 As shown by points P1 and P2, target location 31 can be the location of the current strong point. Figure 6 for Figure 5 The left view of the dial shows that the current in the visible area propagates to the left, resulting in a high local SAR value. Replacing the metal parts in areas with high current with insulating material improves the watch's performance. Figure 4 As shown, the current reverses on both sides of the replacement section, thus effectively reducing the local SAR value. By replacing the insulator portion at multiple points of high current, the effect of SAR reduction in a watch-shaped terminal is ultimately achieved.

[0051] like Figure 5As shown, target location 31 can be the location of current strong points P1 and P2, and the location of feed terminal 23 can be the location of feed positions F1 and F2. A slotted area 211 can be set at both current strong points P1 and P2. A zero-current point 32 exists between the grounding terminal GND and feed position F1, with current strong point P1 located between the current zero-current point 32 and feed position F1. Current strong point P2 is located in the counter-clockwise direction of feed position F2.

[0052] in addition, Figure 5 There is also a strong current point at the grounding terminal GND, but the currents on both sides of this strong current point are reversed. The SAR reduction effect of replacing the insulation material at this strong current point is weaker than the SAR reduction effect of replacing the insulation material at points P1 and P2.

[0053] To facilitate understanding of the current distribution of antenna 2 in various frequency bands, such as Figures 7 to 10 As shown, schematic diagrams of current distribution in several typical frequency bands, including LTE B8, GPS, LTE B1, and LTE B7 / 41 (arranged in ascending order of frequency), are presented. Figure 7 This is a schematic diagram of the current distribution in the LTE B8 band. Figure 8 This is a schematic diagram of the current distribution in the GPS L1 band. Figure 9 This is a schematic diagram of the current distribution in the LTE B1 band. Figure 10 This is a schematic diagram of the current distribution in the LTE B7 / 41 band. Figures 7 to 10 In the diagram, the dashed line represents the current distribution, the arrow indicates the direction of current flow, and target position 31 is a point of strong current.

[0054] It should be noted that the energy absorbed by the human body originates from the radiation of current in the antenna stubs near the body. When the antenna is in operation, the current amplitude distribution on its stubs varies in strength. Areas with stronger current contribute more to the energy absorbed by the human body; the farther the current is from the body, the smaller its contribution; and the reverse current radiation fields at closer distances cancel each other out, contributing little to the energy absorbed. There are two types of strong current areas on the antenna of a watch face: one type has currents in the same direction on both sides; and another type has currents in opposite directions on both sides, with the current flowing radially into / out of the watch's internal circuitry.

[0055] In this embodiment, a groove is cut in the current-strong area with the same current direction on both sides, and the material is replaced with insulating material to form an insulating groove-shaped region 211. This introduces reverse current, which can improve performance and reduce the SAR value of antenna 2. The groove-shaped region 211 can be formed by opening an isolated groove, which can ensure the structural strength and antenna efficiency of the smartwatch. Moreover, the groove direction can be from the bottom of the smartwatch (close to the human body) and penetrate to the top without breaking the metal frame of the watch face.

[0056] It's important to note that with social development and technological advancements, the form of smart terminals is rapidly evolving, shifting from computers and mobile phones towards miniaturization and wearable devices. Watches, traditionally worn accessories, have become a significant development direction for smart terminals. Current smartwatches combine timekeeping, sensing, and wireless communication capabilities, supporting LTE, GPS, and Bluetooth. Since watches are worn for extended periods, sometimes close to the head, minimizing the impact of radio frequency (RF) energy on the human body while maintaining sufficient transmission power is crucial. The SAR value is the primary indicator of the impact of RF energy on the human body. Within the limited size of a smartwatch, maintaining sufficient transmission power to ensure communication capabilities while minimizing the SAR value presents significant challenges to antenna design.

[0057] In related technologies, in smartwatch terminals: LTE antennas with metal dials need to be implemented using the dial, and the antenna is close to the human body, making the radiated energy more easily absorbed by the human body, resulting in a higher SAR value; furthermore, the metal dial antenna solution is limited by industrial design (ID), and the shape of the antenna wiring cannot be freely designed. It must be designed by connecting different feeds, components, stubs and grounding elements in parallel on the dial, making it difficult to reduce SAR by controlling the antenna mode current.

[0058] This application provides a low SAR antenna solution for a smartwatch with a metal dial. In this embodiment, by replacing part of the metal with an insulating material at appropriate locations on the metal dial, the SAR value of the smartwatch in typical high SAR bands is effectively reduced without altering the smartwatch's appearance, antenna design, or significantly affecting radiation efficiency.

[0059] In this embodiment, the watch includes: a watch body 1; and an antenna 2 disposed on the watch body 1. The antenna 2 includes a conductive radiating portion 21, and at least one target position 31 of the radiating portion 21 has a groove-shaped region 211. The interior of the groove-shaped region 211 is divided into non-conductive regions. When the antenna 2 is operating, current flows along the groove-shaped region 211 in the radiating portion 21, and the current directions along the two opposite groove walls of the groove-shaped region 211 are opposite. Thus, by providing a non-conductive groove-shaped region 211, the current directions along the two opposite groove walls of the groove-shaped region 211 are opposite, and the radiation field values ​​of the reverse currents can cancel each other out, reducing the energy absorbed by the human body and thereby lowering the SAR value of the antenna 2.

[0060] Optionally, such as Figure 4As shown, the groove-shaped region 211 includes a first groove wall 2111 and a second groove wall 2112, with the first groove wall 2111 and the second groove wall 2112 facing each other;

[0061] When the antenna 2 is in operation, the current along the extension direction of the first slot wall 2111 is opposite in direction to the current along the extension direction of the second slot wall 2112.

[0062] In this embodiment, the groove-shaped region 211 includes a first groove wall 2111 and a second groove wall 2112, with the first groove wall 2111 and the second groove wall 2112 facing each other. When the antenna 2 is operating, the current along the extension direction of the first groove wall 2111 is opposite in direction to the current along the extension direction of the second groove wall 2112. This allows for reversed currents through the first groove wall 2111 and the second groove wall 2112, thereby reducing the SAR value of the antenna 2.

[0063] Optionally, the watch body 1 includes a display side 11 and a non-display side 12 opposite to the display side 11, and the slot 2113 of the groove-shaped region 211 is formed on the non-display side 12.

[0064] The display side 11 can be equipped with a watch face for the user to view. When the watch is worn on the body, the non-display side 12 is closer to the body than the display side 11. The display side 11 can be the side of the smartwatch with the display screen, while the non-display side 12 can be the side of the smartwatch that is closer to the wrist.

[0065] In addition, the slot 2113 of the slotted region 211 is opened on the non-display side 12, that is, the slotting direction of the slotted region 211 is from the non-display side 12 to the display side 11. The slotted region 211 does not penetrate the display side 11, so that the current flows along the slotted region 211 in the radiating portion 21.

[0066] In this embodiment, the watch body 1 includes a display side 11 and a non-display side 12 facing away from the display side 11. The slot 2113 of the groove-shaped area 211 is opened on the non-display side 12. The non-display side 12 is closer to the human body than the display side 11. Opening a slot on the non-display side 12 can increase the distance between the current and the human body.

[0067] Optionally, the antenna 2 further includes a ground terminal 22 and a feed terminal 23, with a current zero point position 32 between the ground terminal 22 and the feed terminal 23, and the target position 31 located between the current zero point position 32 and the feed terminal 23.

[0068] The target position 31 is related to the target frequency band in which antenna 2 operates. When antenna 2 operates in the target frequency band, the current distribution of antenna 2 consists of two sets of 1 / 2 slot patterns, one clockwise and one counterclockwise, from the feed terminal 23 to the ground terminal 22. The current characteristics of each 1 / 2 slot pattern are as follows: the current from the feed terminal 23 to the ground terminal 22 is divided into two segments with opposite directions, and there is a current zero point position 32 between the feed terminal 23 and the ground terminal 22. The feed terminal 23 may be different, and the target position 31 may also be different depending on the target frequency band.

[0069] In this embodiment, the antenna 2 further includes a grounding terminal 22 and a feeding terminal 23. There is a current zero point position 32 between the grounding terminal 22 and the feeding terminal 23. The target position 31 is located between the current zero point position 32 and the feeding terminal 23. There is a current strong point with the same current direction on both sides between the current zero point position 32 and the feeding terminal 23. The target position 31 can be set as the location of the current strong point, thereby greatly reducing the SAR value of the antenna 2.

[0070] Optionally, when the antenna 2 is working, the current flowing through the radiating portion 21 located in the first direction of the target position 31 is in the same direction as the current flowing through the radiating portion 21 located in the second direction of the target position 31, and the first direction and the second direction are opposite directions.

[0071] It can be assumed that the current flowing through the radiating portions 21 on both sides of the target position 31 has the same direction. For example... Figure 4 As shown, a groove-shaped region 211 is provided at the target position 31. The first direction can be left and the second direction can be right. The current flowing through the radiating part located to the left of the target position 31 has the same direction as the current flowing through the radiating part located to the right of the target position 31. That is, the current flowing through the radiating part located to the left of the groove-shaped region 211 has the same direction as the current flowing through the radiating part located to the right of the groove-shaped region 211.

[0072] In this embodiment, when the antenna 2 is working, the current flowing through the radiating portion 21 located in the first direction of the target position 31 is in the same direction as the current flowing through the radiating portion 21 located in the second direction of the target position 31. The first direction and the second direction are opposite directions, thereby forming a local reverse current at the target position 31, which can greatly reduce the SAR value.

[0073] Optionally, when the antenna 2 is operating in the target frequency band, the position of the slotted region 211 is related to the current value flowing through the target position 31.

[0074] Specifically, by determining the current values ​​at various locations of the radiating portion 21 when the antenna 2 is operating in the target frequency band, the target location 31 can be determined. This allows for the creation of a slotted region 211 at the target location 31. In practical applications, the target location 31 can be determined through simulation.

[0075] In this embodiment, when the antenna 2 is operating in the target frequency band, the position of the slotted region 211 is related to the current value flowing through the target position 31. Since the area with stronger current contributes more to the energy absorption of the human body, and the area with weaker current contributes less to the energy absorption of the human body, the position of the slotted region 211 can be determined by the current value. The position with a larger current value can be determined as the position of the slotted region 211, thereby effectively reducing the SAR value.

[0076] Optionally, when the antenna 2 is operating in the target frequency band, the current value at the target location 31 meets a preset condition;

[0077] The preset conditions include at least one of the following:

[0078] The current value at the target location 31 is greater than a preset threshold;

[0079] The current value at the target location 31 is greater than the current value at the other locations in the radiating portion 21 besides the target location 31.

[0080] The target frequency band can be one or more frequency bands. For example, the target frequency band may include the LTE B1 band and / or the LTE B7 band, etc. The target location 31 can be determined by simulation. For example, the location in the radiating part 21 where the current value is greater than a preset threshold can be determined as the target location 31 by simulation. The preset threshold can be set according to actual needs. For example, the preset threshold can be set to 90%, 80%, or 70% of the maximum current value in the radiating part; or the preset threshold can be set to a fixed value, such as 5μA, 4μA, or 3μA, etc. The preset threshold can also be related to the maximum rated current of the watch. For example, the preset threshold can be set to 90%, 80%, or 70% of the maximum rated current, etc. This embodiment does not limit the preset threshold.

[0081] It should be noted that the location where the current value meets the preset condition can be considered as the current strong point of antenna 2.

[0082] In this embodiment, the current value at the target location 31 is greater than a preset threshold, or the current value at the target location 31 is greater than the current value at other locations in the radiation portion 21 other than the target location 31, so that a groove-shaped region 211 can be set at the location with strong current, which can effectively reduce the SAR value.

[0083] Optionally, the target frequency band includes at least a first frequency band and a second frequency band. When the antenna 2 operates in the first frequency band and the second frequency band, the current value at the target location 31 satisfies the preset condition.

[0084] Specifically, when the antenna 2 is operating in the first frequency band, the current value at the target location 31 satisfies the preset condition; and when the antenna 2 is operating in the second frequency band, the current value at the target location 31 satisfies the preset condition. Whether the antenna 2 is operating in the first frequency band or the antenna 2 is operating in the second frequency band, the target location 31 is a high-current point in the antenna radiating part 21.

[0085] In this embodiment, the target frequency band includes at least a first frequency band and a second frequency band. When the antenna 2 is operating in the first frequency band and the second frequency band, the current value at the target location 31 satisfies the preset condition. Thus, in at least two frequency bands, the current value at the target location 31 satisfies the preset condition when the antenna 2 is operating, thereby reducing the SAR value of the antenna 2 in at least two frequency bands.

[0086] Optionally, the grooved area 211 is the button area of ​​the watch.

[0087] Specifically, the positions of the feed terminal 23 and ground terminal 22 of antenna 2 can be adjusted so that the button area of ​​the watch becomes the current strong point of antenna 2. By adjusting the positions of the feed terminal 23 and ground terminal 22 of antenna 2, the target position 31 is moved to the button area of ​​the watch, so that when setting the slot-shaped area 211, the slot-shaped area 211 and the button area can share the same slot.

[0088] It should be noted that in the design of smartwatches with buttons, by adjusting the electrical connection positions of elements such as antenna power supply, centralized components, and grounding inside the smartwatch, and by placing the insulator replacement part in the same position as the watch button, the impact of changes in the smartwatch's casing material on the ID can be further avoided.

[0089] In this embodiment, by utilizing the rotational symmetry of the smartwatch structure, the slotted area 211 for SAR reduction is integrated with the button and other structures by rotating the feed terminal 23 of the antenna 2, the switch and the grounding point, etc., so that the slotting of the metal casing does not affect the overall appearance and material consistency of the smartwatch.

[0090] In this embodiment, the grooved area 211 is the button area of ​​the watch, thereby enabling the grooved area 211 and the button area to share the same groove, which can improve the consistency of the overall appearance and material, and reduce the production difficulty of the watch.

[0091] Optionally, the radiating portion 21 is the casing of the watch.

[0092] The radiating part 21 can be the metal case of a watch.

[0093] Optionally, the watch body 1 is ring-shaped.

[0094] The watch can be a wearable device.

[0095] The shape of the watch body 1 can be circular, square, or elliptical, etc., and this embodiment does not limit it.

[0096] The watch of this application is illustrated by several specific embodiments below:

[0097] Example 1:

[0098] In this embodiment, taking a smartwatch as an example, when there are strong current points on the antenna of the smartwatch with the same current direction on both sides, a slot is cut at the strong current point to form a slotted area. This embodiment is particularly suitable for smartwatches where replacing the metal with an insulating part does not affect the ID and appearance, such as smartwatches where the outer surface is covered with paint and the dial substrate is not exposed.

[0099] like Figure 11 As shown, slots are cut into two high-current points P1 and P2 on the smartwatch antenna, creating slotted areas. Slots are also cut into the metal portions at the high-current points P1 and P2 on the smartwatch dial, and insulators S1 and S2 are filled in these slots. Insulator S1 is filled at P1, and insulator S2 is filled at P2. For example, the insulators can be made of ABS plastic. By filling the slots with insulating material, local reverse current can be achieved at the two high-current points, reducing the SAR value.

[0100] Since the location of the current strong point is related to the frequency band and current mode, the SAR reduction effect of this embodiment is mainly reflected in the designed frequency band. The SAR reduction effect on other frequency bands depends on whether there is a similar current strong point at the slot location in their current mode. Since this embodiment only modifies the metal shape of the current path and does not change the antenna circuit topology, it has almost no impact on antenna performance.

[0101] Beneficial effects of Example 1:

[0102] The SAR values ​​of the smartwatch using the existing solution and the smartwatch in Example 1 were tested respectively. The test environment was the same, and the antenna operating frequency band was the LTE B1 band. The difference between the smartwatch using the existing solution and the smartwatch in Example 1 is that the existing solution does not have an insulating slotted area. The test results are shown in Table 1:

[0103] Table 1

[0104]

[0105]

[0106] As shown in Table 1, the on-wrist efficiency difference between the two schemes is only 0.18 dB, indicating that the performance is not affected. Under the same input power condition (0.25 W), the SAR value of Example 1 is 1.09 smaller than that of the existing scheme. After on-wrist efficiency normalization, the SAR value of Example 1 is 0.87 smaller, demonstrating an effective SAR reduction effect.

[0107] It should be noted that while achieving better electrical performance in the smartwatch, the recessed metal frame of the dial still maintains sufficient mechanical strength. Some of the recesses are located between the lugs and will be partially obscured by the strap during use, reducing the impact of the insulating material filling the recesses on the appearance.

[0108] Example 2:

[0109] Compared to Example 1, in this example, the button positions of the smartwatch are reused as the metal slot filling positions, thereby improving the consistency of the smartwatch's surface material.

[0110] The antenna design for the metal dial of a smartwatch features a ring topology. This embodiment uses a circular ring as an example, but it can also be applied to square ring, elliptical, and other irregularly shaped ring-shaped dial antenna designs. Figure 12 As shown, in this embodiment, utilizing the rotational symmetry of a ring topology, the entire metal dial of the smartwatch is rotated to rotate the internal power supply terminal and grounding point, shifting the current-strongest point to the dial button areas P1 and P2 (assuming the two buttons are symmetrically positioned vertically on the right side of the dial). The button positions are then reused as metal slot filling locations, filled with insulators S1 and S2. The filled smartwatch appears as follows: Figure 13 As shown, the button can conform to the slot, thus shielding the slot on the metal dial and avoiding the impact of the slot on the consistency of the surface material of the SAR reduction scheme.

[0111] Beneficial effects of Example 2:

[0112] The SAR values ​​of the smartwatch using the existing solution and the smartwatch in Example 2 were tested respectively. The test environment was the same, and the antenna operating frequency band was the LTE B1 band. The difference between the smartwatch using the existing solution and the smartwatch in Example 2 is that the existing solution does not have an insulating slotted area. The test results are shown in Table 2:

[0113] Table 2

[0114]

[0115]

[0116] As shown in Table 2, the on-wrist efficiency difference between the two schemes is only 0.05 dB, indicating that the performance is not affected. Under the same input power condition (0.25 W), the SAR value of Example 2 is 1.27 smaller than that of the existing scheme. After on-wrist efficiency normalization, the SAR value of Example 2 is 1.18 smaller, demonstrating an effective SAR reduction effect.

[0117] Example 3:

[0118] In this embodiment, to address the SAR reduction requirements across multiple frequency bands, when the antenna has strong current points with the same current direction on both sides in at least two frequency bands, a slot is cut at these strong current points to create a slotted region. Taking the SAR reduction application in the LTE B1 and B7 / 41 frequency bands as an example... Figure 14 This is a current distribution diagram of the antenna in the LTE B1 band. Figure 15 This is a current distribution diagram of the antenna in the LTE B7 band.

[0119] By comparison Figure 14 and Figure 15 Regarding the current distribution, at points P1 and P2 on the antenna, there are strong current points with the same current direction on both sides in both frequency bands. Grooves are cut into the metal parts at the corresponding positions on the dial and filled with insulators S1 and S2. Insulator S1 is filled at position P1, and insulator S2 is filled at position P2. The positions and shapes of insulators S1 and S2 are shown in [reference needed]. Figures 16 to 17 .

[0120] Beneficial effects of Example 3:

[0121] The SAR values ​​of the smartwatch using the existing solution and the smartwatch in Example 3 were tested respectively. The test environment was the same, and the antenna operating frequency bands were LTE B1 and LTE B7. The difference between the smartwatch using the existing solution and the smartwatch in Example 3 is that the existing solution does not have an insulating slotted area. The test results are shown in Table 3:

[0122] Table 3

[0123]

[0124] As shown in Table 3, in the LTE B1 band, the on-wrist efficiency difference between the two schemes is only 0.19 dB, indicating that the performance is almost unaffected. Under the same input power condition (0.25W), the SAR value of Example 3 is 1.0 smaller than that of the existing scheme. After on-wrist efficiency normalization, the SAR value of Example 3 is 0.77 smaller, demonstrating an effective SAR reduction effect.

[0125] In the LTE B7 band, Example 3 achieves 0.8 dB higher on-wrist efficiency. Under the same input power conditions (0.25W), Example 3's SAR value is 0.19 lower than the existing scheme. After on-wrist efficiency normalization, Example 3's SAR value is 0.97 lower, demonstrating an effective SAR reduction effect.

[0126] Based on the above data, after normalizing the wrist efficiency, the smartwatch in Example 3 has a significant SAR reduction effect in both the LTE B1 and LTE B7 bands.

[0127] Example 4:

[0128] Similar to the improvement of Embodiment 1 by Embodiment 2, compared with Embodiment 3, in this embodiment, the button positions of the smartwatch are reused as the metal slot filling positions, thereby improving the consistency of the surface material of the smartwatch.

[0129] In this embodiment, utilizing the rotational symmetry of the antenna ring topology, the entire internal feed terminal and grounding point of the smartwatch's metal dial are rotated to bring the high-current points to the dial button areas P1 and P2 (assuming the two buttons are symmetrically positioned on the left and right sides of the dial). The button positions are then reused as insulators S1 and S2 to fill the metal slots. The buttons can conform to the slots, shielding the slots on the metal dial and avoiding the impact of the SAR reduction scheme's slotting on the consistency of the surface material.

[0130] Figure 18 This is a current distribution diagram of the antenna in the LTE B1 band. Figure 19 This is a current distribution diagram of the antenna in the LTE B7 band. The location and shape of insulators S1 and S2 are shown in [reference needed]. Figures 20 to 21 .

[0131] Beneficial effects of Example 4:

[0132] The SAR values ​​of the smartwatch using the existing solution and the smartwatch in Example 4 were tested respectively. The test environment was the same, and the antenna operating frequency bands were LTE B1 and LTE B7. The difference between the smartwatch using the existing solution and the smartwatch in Example 4 is that the existing solution does not have an insulating slotted area. The test results are shown in Table 4:

[0133] Table 4

[0134]

[0135]

[0136] As shown in Table 4, in the LTE B1 band, the on-wrist efficiency difference between the two schemes is only 0.17dB, indicating that the performance is almost unaffected. Under the same input power condition (0.25W), the SAR value of Example 4 is 1.0 smaller than that of the existing scheme. After on-wrist efficiency normalization, the SAR value of Example 4 is 0.79 smaller, demonstrating an effective SAR reduction effect.

[0137] In the LTE B7 band, Example 4 achieves 1.31 dB higher on-wrist efficiency. Under the same input power conditions (0.25W), Example 4's SAR value is 0.15 higher than the existing scheme. After on-wrist efficiency normalization, Example 4's SAR value is 1.05 lower, demonstrating an effective SAR reduction effect.

[0138] Based on the above data, after normalizing the wrist efficiency, the smartwatch in Example 4 has a significant SAR reduction effect in both the LTE B1 and LTE B7 bands.

[0139] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A watch characterized in that, The watch comprises: a watch body (1); an antenna (2) arranged on the watch body (1), the antenna (2) comprising a conductive radiation part (21), at least one target position (31) of the radiation part (21) being provided with a slot-shaped region (211), an inner part of a slot of the slot-shaped region (211) being a non-conductive region; wherein, in the case that the antenna (2) is working, current flows along the slot-shaped region (211) in the radiation part (21), and the current directions along the opposite two slot walls of the slot-shaped region (211) are opposite; the slot-shaped region (211) comprises a first slot wall (2111) and a second slot wall (2112), the first slot wall (2111) being opposite to the second slot wall (2112); wherein, in the case that the antenna (2) is working, the current direction along the extension direction of the first slot wall (2111) is opposite to the current direction along the extension direction of the second slot wall (2112); the watch body (1) comprises a display side (11) and a non-display side (12) opposite to the display side, a slot opening (2113) of the slot-shaped region (211) being arranged on the non-display side (12).

2. The watch of claim 1, wherein, The antenna (2) further comprises a ground terminal (22) and a feeding terminal (23), there is a current zero point position (32) between the ground terminal (22) and the feeding terminal (23), and the target position (31) is located between the current zero point position (32) and the feeding terminal (23).

3. The watch of claim 1, wherein, In the case that the antenna (2) is working, the current flowing through the radiation part (21) in the first direction of the target position (31) has the same direction as the current flowing through the radiation part (21) in the second direction of the target position (31), and the first direction and the second direction are opposite directions.

4. The watch of claim 1, wherein, In the case that the antenna (2) works in a target frequency band, the position of the slot-shaped region (211) is related to the current value flowing through the target position (31).

5. The watch of claim 4, wherein, In the case that the antenna (2) works in a target frequency band, the current value of the target position (31) satisfies a preset condition; wherein, the preset condition comprises at least one of the following: the current value at the target position (31) is greater than a preset threshold value; the current value at the target position (31) is greater than the current value at the remaining positions of the radiation part (21) except the target position (31).

6. The watch of claim 5, wherein, The target frequency band at least comprises a first frequency band and a second frequency band, in the case that the antenna (2) works in the first frequency band and the second frequency band, the current value at the target position (31) satisfies the preset condition.

7. The watch of claim 1, wherein, The slot-shaped region (211) is a key region of the watch.

8. The watch of claim 1, wherein, The radiation part (21) is a shell of the watch.

9. The watch of claim 1, wherein, The shape of the watch body (1) is annular.

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