Wearable electronic device

Abstract

The invention provides a wearable electronic device. The wearable electronic equipment comprises an antenna assembly, and the antenna assembly comprises a radiator and a feed source. The radiator comprises a first sub-radiator and a second sub-radiator; the first sub-radiator is provided with a first free end, a feeding point and a second free end which are arranged in sequence, and the first free end and the second free end form a first opening; the second sub-radiator and the first sub-radiator are arranged at intervals in the first direction and are electrically connected, the second sub-radiator is provided with a third free end and a fourth free end, and the third free end and the fourth free end form a second opening; the feed source is electrically connected to the feed point so as to excite a first resonant mode of the first sub-radiator to support a first target frequency band and excite a second resonant mode of the second sub-radiator to support a second target frequency band, the first resonant mode is a half-wavelength dipole mode, the second resonant mode is a half-wavelength dipole mode, and the second target frequency band is a half-wavelength dipole mode. The frequency of the second target frequency band is greater than that of the first target frequency band.

Description

Technical Field

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

[0002] With technological advancements, wearable electronic devices with communication functions, such as rings or wristbands, typically include antenna components to enable their communication capabilities. However, the antenna components in these wearable electronic devices are often designed for a single frequency band, which limits their communication functionality. Summary of the Invention

[0003] In a first aspect, one embodiment of this application provides a wearable electronic device, the wearable electronic device including an antenna assembly, the antenna assembly comprising:

[0004] Radiator, the radiator comprising:

[0005] A first sub-radiator, the first sub-radiator having a first free end, a feed point and a second free end arranged sequentially, the first free end and the second free end forming a first opening; and

[0006] The second sub-radiator is arranged at a distance from and electrically connected to the first sub-radiator in a first direction. The second sub-radiator has a third free end and a fourth free end, and the third free end and the fourth free end form a second opening.

[0007] The feed source is electrically connected to the feed point to excite a first resonant mode of the first sub-radiator to support a first target frequency band and to excite a second resonant mode of the second sub-radiator to support a second target frequency band. The first resonant mode is a half-wavelength dipole mode, the second resonant mode is a half-wavelength dipole mode, and the frequency of the second target frequency band is greater than the frequency of the first target frequency band.

[0008] In summary, the wearable electronic device provided by the embodiments of this application designs the radiators in the antenna assembly of the wearable electronic device. The radiators include a first sub-radiator and a second sub-radiator spaced apart and electrically connected in a first direction. The first sub-radiator has a first opening, and the second sub-radiator has a second opening. The feed source is electrically connected to the feed point of the first sub-radiator to excite the half-wavelength dipole mode of the first sub-radiator to support a first target frequency band, and to excite the half-wavelength dipole mode of the second sub-radiator to support a second target frequency band, thereby realizing the communication function of the wearable electronic device in both the first and second target frequency bands. Therefore, the wearable electronic device provided by the embodiments of this application can meet the communication requirements of both the first and second target frequency bands. Attached Figure Description

[0009] To more clearly illustrate the technical solutions of 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.

[0010] Figure 1 A perspective view of a wearable electronic device provided according to an embodiment of this application;

[0011] Figure 2 This is one embodiment of the present application. Figure 1 A schematic diagram of the cross-sectional structure of the wearable electronic device along line II;

[0012] Figure 3 This is one embodiment of the present application. Figure 1 A three-dimensional schematic diagram of the radiator in the wearable electronic device shown;

[0013] Figure 4 for Figure 3 A schematic diagram of the radiator from another angle;

[0014] Figure 5 One implementation method Figure 3 The equivalent circuit diagram of the wearable electronic device shown is shown.

[0015] Figure 6 Another embodiment of this application Figure 1 A three-dimensional schematic diagram of the radiator and motherboard in a wearable electronic device shown.

[0016] Figure 7 Another embodiment of this application Figure 1 A schematic diagram of the cross-sectional structure of the wearable electronic device along line II;

[0017] Figure 8 for Figure 3 A schematic diagram of the resonant current corresponding to the fundamental mode of the radiator of the antenna assembly in the wearable electronic device;

[0018] Figure 9 for Figure 3 The diagram shows the resonant current distribution when the antenna assembly of the wearable electronic device supports the first target frequency band in a free space state.

[0019] Figure 10 for Figure 3 The diagram shows the resonant current distribution of the antenna assembly when the wearable electronic device is in free space and supports the second target frequency band.

[0020] Figure 11 A schematic diagram showing the location of the first connection point of the first sub-radiator in a wearable electronic device;

[0021] Figure 12 This is a schematic diagram showing the location of the second connection point of the second sub-radiator in a wearable electronic device.

[0022] Figure 13 A schematic diagram showing the gap dimensions between the second sub-radiator and the first sub-radiator in a wearable electronic device according to one embodiment;

[0023] Figure 14 for Figure 3 The diagram shows the lengths of the first and second sub-radiators in the wearable electronic device.

[0024] Figure 15 This is a partial schematic diagram of a wearable electronic device according to one embodiment;

[0025] Figure 16 This is a partial schematic diagram of a wearable electronic device according to another embodiment;

[0026] Figure 17 This is a partial schematic diagram of a wearable electronic device according to yet another embodiment;

[0027] Figure 18 This is a partial schematic diagram of a wearable electronic device according to yet another embodiment;

[0028] Figure 19 for Figure 15 A schematic diagram showing the distance between the ground pole and the radiator in the second direction in a wearable electronic device.

[0029] Figure 20 This is yet another embodiment of the present application. Figure 1 A schematic diagram of the cross-sectional structure of the wearable electronic device along line II;

[0030] Figure 21 A schematic diagram of an equivalent circuit for a wearable electronic device provided in another embodiment of this application;

[0031] Figure 22 A perspective view of a wearable electronic device provided for another embodiment of this application;

[0032] Figure 23 S-parameter curves of an antenna assembly for a wearable electronic device provided in one embodiment of this application, when the wearable electronic device is in free space and in a wearing state;

[0033] Figure 24 This is a schematic diagram comparing the radiation performance of an antenna assembly for a wearable electronic device provided in one embodiment of this application when the wearable electronic device is in free space and when it is being worn. Detailed Implementation

[0034] The technical solution of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the embodiments described in this application are only a part of the embodiments, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without creative effort are within the protection scope of this application.

[0035] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment to other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0036] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a particular order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, an assembly or device comprising one or more components is not limited to the one or more components listed, but may optionally also include one or more components not listed but inherent to the exemplified product, or one or more components that it should have based on the described function.

[0037] The wearable electronic device provided in the embodiments of this application will now be described in detail.

[0038] The wearable electronic device 1 can be, but is not limited to, a ring (or bracelet), bracelet, anklet, or necklace with communication function. The wearable electronic device is worn on a target part of the user's body. For example, when the wearable electronic device 1 is a ring, the target part is the user's finger; that is, the wearable electronic device can be worn on the user's finger. When the wearable electronic device is a bracelet, the target part is the user's wrist; that is, the wearable electronic device can be worn on the user's wrist. When the wearable electronic device is an anklet, the target part is the user's ankle; that is, the wearable electronic device can be worn on the user's ankle. When the wearable electronic device is a necklace, the target part is the user's neck; that is, the wearable electronic device can be worn on the user's neck. It is understood that the above examples are merely examples of possible products of the wearable electronic device 1 and should not be construed as limiting the wearable electronic device 1 provided in the embodiments of this application. In the following schematic diagrams of various embodiments, the wearable electronic device 1 is illustrated as a ring. It should be understood that this should not be construed as a limitation on the embodiments of this application.

[0039] Please refer to the following: Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , Figure 1 A perspective view of a wearable electronic device provided according to an embodiment of this application; Figure 2 This is one embodiment of the present application. Figure 1 A schematic diagram of the cross-sectional structure of the wearable electronic device along line II; Figure 3 This is one embodiment of the present application. Figure 1 A three-dimensional schematic diagram of the radiator in the wearable electronic device shown; Figure 4 for Figure 3 A schematic diagram of the radiator from another angle; Figure 5 One implementation method Figure 3 The diagram shows the equivalent circuit of the wearable electronic device. Figure 1 Image (a) is a perspective view of a wearable electronic device provided in one embodiment of this application. Figure 1 (b) in the middle is Figure 1The diagram in (a) shows the wearable electronic device when worn on a target location. The wearable electronic device 1 includes an antenna assembly 10. The antenna assembly 10 includes a radiator 110 and a feed source S. The radiator 110 includes a first sub-radiator 111 and a second sub-radiator 112. The first sub-radiator 111 has a first free end 1111, a feed point P, and a second free end 1112 arranged sequentially, with the first free end 1111 and the second free end 1112 forming a first opening 111a. The second sub-radiator 112 is spaced apart from the first sub-radiator 111 in a first direction D11 and is electrically connected. The second sub-radiator 112 has a third free end 1121 and a fourth free end 1122, with the third free end 1121 and the fourth free end 1122 forming a second opening 112a. The feed source S is electrically connected to the feed point P to excite the first sub-radiator 111 to a first resonant mode supporting the first target frequency band, and to excite the second sub-radiator 112 to a second resonant mode supporting the second target frequency band. The first resonant mode is a half-wavelength dipole mode, the second resonant mode is a half-wavelength dipole mode, and the frequency of the second target frequency band is greater than the frequency of the first target frequency band.

[0040] exist Figure 1 In (b) of the above, the wearable electronic device 1 is used as an example of a ring (also called a finger ring), and the user's target part 3 is used as a finger for simulation. When the wearable electronic device 1 is in a wearing state, the ring (also called a finger ring) is worn on the user's finger. Furthermore, in Figure 2 In this context, the orientation of the front of the first sub-radiator 111 is marked as D0.

[0041] The first sub-radiator 111 can be, but is not limited to, a metal radiator made of metal material, a printed circuit board (FPC) radiator, or a laser direct forming (LDS) radiator printed on a substrate.

[0042] In this embodiment, viewed from the side, the first sub-radiator 111 is arc-shaped or similarly arc-shaped. In this embodiment, the two ends of the first sub-radiator 111 along its extension direction are a first free end 1111 and a second free end 1112, respectively. The first sub-radiator 111 is not closed; the first free end 1111 and the second free end 1112 form a first opening 111a. The feed point P is located between the first free end 1111 and the second free end 1112. The location of the feed point P will be described in detail later.

[0043] The second sub-radiator 112 can be, but is not limited to, a metal radiator made of metal, a printed circuit board (FPC) radiator, or an LDS radiator printed on a bracket. The second sub-radiator 112 can be made of the same material as the first sub-radiator 111, or it can be made of a different material than the first sub-radiator 111; this is not limited here.

[0044] In this embodiment, viewed from the side, the second sub-radiator 112 is arc-shaped or similarly arc-shaped. In this embodiment, the two ends of the second sub-radiator 112 along its extension direction are a third free end 1121 and a fourth free end 1122, respectively. In this embodiment, the third free end 1121 is disposed adjacent to the first free end 1111, and the fourth free end 1122 is disposed adjacent to the second free end 1112. The second sub-radiator 112 is not closed; the third free end 1121 and the fourth free end 1122 form a second opening 112a.

[0045] In this embodiment, the first direction D11 is the width direction of the wearable electronic device 1. The second sub-radiator 112 is arranged at a distance from the first sub-radiator 111 along the first direction D11; in other words, the second sub-radiator 112 and the first sub-radiator 111 are spaced apart along the width direction of the wearable electronic device 1. Thus, the first sub-radiator 111 and the second sub-radiator 112 can fully utilize the space along the width direction of the wearable electronic device 1, making the wearable electronic device 1 more compact. The method by which the second sub-radiator 112 is electrically connected to the first sub-radiator 111 will be described in detail later. Because the second sub-radiator 112 is electrically connected to the first sub-radiator 111, the excitation signal from the feed source S received at the feed point P of the first sub-radiator 111 can be transmitted from the first sub-radiator 111 to the second sub-radiator 112.

[0046] In one embodiment, the first sub-radiator 111 is part of an annular curved surface, and the second sub-radiator 112 is part of an annular curved surface. In another embodiment, the first sub-radiator 111 and the second sub-radiator 112 share a common annular curved surface. This allows the radiator 110 to have a smaller thickness, thereby contributing to a thinner and lighter size of the wearable electronic device 1.

[0047] The feed source S is electrically connected to the feed point P in a manner that can be, but is not limited to, through a feed component (such as conductive adhesive, conductive spring, or conductive wire). The feed source S is used to excite the first sub-radiator 111 to a first resonant mode to support the first target frequency band. The first resonant mode is a half-wavelength dipole mode; in other words, the half-wavelength dipole mode of the first sub-radiator 111 supports the first target frequency band. The half-wavelength dipole mode of the first sub-radiator 111 is also called the fundamental mode. In other words, the fundamental mode of the first sub-radiator 111 is a half-wavelength dipole mode. The fundamental mode of the first sub-radiator 111 supports the first target frequency band.

[0048] Furthermore, in this embodiment, since the first sub-radiator 111 and the second sub-radiator 112 are electrically connected, the excitation signal generated by the feed source S can be transmitted to the first sub-radiator 111 via the feed point P, and then to the second sub-radiator 112 via the first sub-radiator 111. Therefore, the first sub-radiator 111 supports the first target frequency band, and the second sub-radiator 112 also supports the first target frequency band. Thus, the antenna assembly 10 has good communication performance in the first target frequency band.

[0049] The feed source S is used to excite the second resonant mode of its second sub-radiator 112 to support the second target frequency band. The second resonant mode is a half-wavelength dipole mode; in other words, the half-wavelength dipole mode of the second sub-radiator 112 supports the second target frequency band. The half-wavelength dipole mode of the second sub-radiator 112 is also called the fundamental mode. In other words, the fundamental mode of the second sub-radiator 112 is a half-wavelength dipole mode. The fundamental mode of the second sub-radiator 112 supports the second target frequency band.

[0050] Furthermore, in this embodiment, since the first sub-radiator 111 and the second sub-radiator 112 are electrically connected, the excitation signal generated by the feed source S can be transmitted to the first sub-radiator 111 via the feed point P, and then to the second sub-radiator 112 via the first sub-radiator 111. Therefore, the second sub-radiator 112 supports the second target frequency band, and the first sub-radiator 111 also supports the second target frequency band. Thus, the antenna assembly 10 has better communication performance in the second target frequency band.

[0051] The frequency of the second target frequency band is greater than that of the first target frequency band. Therefore, the frequency of the second target frequency band is higher than that of the first target frequency band, and the frequency of the first target frequency band is lower than that of the second target frequency band.

[0052] For example, in one embodiment, the first target frequency band includes the GPS L1 band (1.575GHz to 1.625GHz) and the second target frequency band includes the Bluetooth band (2.43GHz to 2.4825GHz). Therefore, the antenna assembly 10 in the wearable electronic device 1 provided in this application embodiment can meet the communication requirements of the GPS L1 band and the Bluetooth band.

[0053] In summary, the wearable electronic device 1 provided in this application, through the design of the radiator 110 in the antenna assembly 10 of the wearable electronic device 1, includes a first sub-radiator 111 and a second sub-radiator 112 arranged at intervals and electrically connected in a first direction D11. The first sub-radiator 111 has a first opening 111a, and the second sub-radiator 112 has a second opening 112a. The feed source S is electrically connected to the feed point P of the first sub-radiator 111 to excite the half-wavelength dipole mode of the first sub-radiator 111 to support the first target frequency band, and to excite the half-wavelength dipole mode of the second sub-radiator 112 to support the second target frequency band, thereby realizing the communication function of the wearable electronic device 1 in the first target frequency band and the second target frequency band. Therefore, the wearable electronic device 1 provided in this application can meet the communication requirements of dual-band communication in the first target frequency band and the second target frequency band.

[0054] Furthermore, in the wearable electronic device 1 provided in this application embodiment, the first sub-radiator 111 has a feed point P, and the second sub-radiator 112 is electrically connected to the first sub-radiator 111. Therefore, the excitation signal of the feed source S can be transmitted to the first sub-radiator 111 through the feed point P, and then to the second sub-radiator 112 through the first sub-radiator 111. This achieves the goal of enabling the first sub-radiator 111 to support the first target frequency band and the second sub-radiator 112 to support the second target frequency band using a single feed point, making the structure of the antenna assembly 10 relatively simple and its size small.

[0055] Please see Figure 6 and Figure 7 , Figure 6 Another embodiment of this application Figure 1 A three-dimensional schematic diagram of the radiator and motherboard in a wearable electronic device shown. Figure 7 Another embodiment of this application Figure 1 A schematic diagram of the cross-sectional structure of the wearable electronic device along line II. Among them, Figure 6 (a) and Figure 6 (b) shows schematic diagrams of the radiator and the motherboard from different perspectives; Figure 7 (a) in this application is another embodiment of the present application. Figure 1 A schematic diagram of the cross-sectional structure of the wearable electronic device along line II; Figure 7 (b) in the middle is Figure 7 The equivalent circuit diagram of (a) is shown below. In this embodiment, the wearable electronic device 1 includes an antenna assembly 10. The antenna assembly 10 includes a radiator 110 and a feed source S. The radiator 110 includes a first sub-radiator 111 and a second sub-radiator 112. The antenna assembly 10, etc., are described in detail above and will not be repeated here.

[0056] Furthermore, in this embodiment, the wearable electronic device 1 also includes a motherboard 20. The motherboard 20 includes a ground electrode 220. The ground electrode 220 and the radiator 110 are stacked on the second direction D22. When the wearable electronic device 1 is worn on the user's target part 3, the ground electrode 220 is closer to the target part 3 than the radiator 110. The ground electrode 220 and the radiator 110 are coupled to generate a resonant current to support the first target frequency band and the second target frequency band.

[0057] In this embodiment, when the wearable electronic device 1 is worn on the user's target part 3, the ground electrode 220 is closer to the target part 3 than the radiator 110; in other words, when the wearable electronic device 1 is worn on the user's target part 3, the radiator 110 is further away from the user's target part 3 than the ground electrode 220. When the antenna assembly 10 is working, the radiator 110 is further away from the user's target part 3 than the ground electrode 220. Therefore, the obstruction of the radiator 110 by the ground electrode 220 can be reduced, so that the antenna assembly 10 has better antenna performance in both the first target frequency band and the second target frequency band.

[0058] Furthermore, the ground electrode 220 is coupled with the radiator 110 to generate a resonant current to support the first target frequency band and the second target frequency band, thereby enabling the antenna assembly 10 of the wearable electronic device 1 to have better antenna performance in the first target frequency band and the second target frequency band in free space.

[0059] Please refer to the following: Figure 8 , Figure 9 and Figure 10 , Figure 8 for Figure 3 A schematic diagram of the resonant current corresponding to the fundamental mode of the radiator of the antenna assembly in the wearable electronic device; Figure 9 for Figure 3 The diagram shows the resonant current distribution when the antenna assembly of the wearable electronic device supports the first target frequency band in a free space state. Figure 10 for Figure 3The diagram shows the resonant current distribution when the antenna assembly of a wearable electronic device supports the second target frequency band in free space. For ease of illustration, Figure 8 (a) in the image is in color. Figure 8 (b) in the middle is Figure 8 The grayscale image of (a) in the image; Figure 9 (a) in the image is in color. Figure 9 (b) in the middle is Figure 9 The grayscale image of (a) in the image. Accordingly, Figure 10 (a) in the image is in color. Figure 10 (b) in the middle is Figure 10 The grayscale image of (a) in the image. Figure 9 (a) and Figure 10 In (a), red dots indicate points with strong current, and blue dots indicate points with weak current.

[0060] Depend on Figure 8 It can be seen that the weakest point of the resonant current Ia corresponding to the fundamental mode of the radiator 110 is located at both ends of the radiator 110, while the strongest point is located at the center of the radiator 110; furthermore, the resonant current Ia flows from one end of the radiator 110 to the other. Correspondingly, the ground electrode 220 is coupled to the radiator 110, generating a resonant current Ib. The weakest point of the resonant current Ib of the ground electrode 220 is located at both ends of the ground electrode 220, while the strongest point is located at the center of the ground electrode 220; furthermore, the resonant current Ib flows in the opposite direction to the resonant current Ia. From the distribution of the resonant circuit Ia corresponding to the fundamental mode of the radiator 110, the fundamental mode of the radiator 110 is a half-wavelength dipole mode.

[0061] Depend on Figure 9 As can be seen, when the wearable electronic device 1 is in free space, the first sub-radiator 111 generates a first resonant current when it supports the first target frequency band (in this embodiment, the first target frequency band is 1.6GHz of the GPS L1 band for simulation). In other words, the first resonant mode of the first sub-radiator 111 corresponds to the first resonant current. The current weakness of the first resonant current is located at the first free end 1111 and the second free end 1112 of the first sub-radiator 111, and the current strength of the first resonant current is located at the midpoint of the first sub-radiator 111. In the figure, the first resonant current flows from the second free end 1112 of the first sub-radiator 111 to the first free end 1111. Correspondingly, as can be seen from the figure, when the first sub-radiator 111 supports the first target frequency band, a resonant current is also generated on the second sub-radiator 112, and a resonant current is also generated on the ground electrode 220. From the distribution of the first resonant current, the first resonant mode is a half-wavelength dipole mode, which can also be regarded as a transmission line mode.

[0062] Understandably, the first resonant current is periodically changing. In the current half-wavelength mode, the first resonant current flows from the second free end 1112 of the first sub-radiator 111 to the first free end 1111. In the next half-wavelength cycle, the first resonant current... Figure 9 The direction of the first resonant current in the current wavelength period is opposite to that shown. Specifically, in the next half-wavelength period, the first resonant current flows from the first free end 1111 of the first sub-radiator 111 to the second free end 1112. Correspondingly, when the antenna assembly 10 supports the first target frequency band, the resonant current of the second sub-radiator 112 and the resonant current of the ground electrode 220 are also periodically changing. Specifically, in the next half-wavelength period: the direction of the resonant current of the second sub-radiator 112 is opposite to that shown. Figure 9 The direction of the resonant current of the second sub-radiator 112 in the current half-wavelength period is opposite to that shown; the direction of the resonant current of the ground electrode 220 is opposite to that shown. Figure 9 The direction of the resonant current at ground pole 220 during the current half-wavelength period is opposite.

[0063] Depend on Figure 10 As can be seen, when the wearable electronic device 1 is in free space, and the second sub-radiator 112 supports the second target frequency band (in this embodiment, the second target frequency band is simulated as 2.43GHz of the Bluetooth band), a second resonant current is generated. In other words, the second resonant mode of the second sub-radiator 112 corresponds to the second resonant current. The current weakness of the second resonant current is located at the third free end 1121 and the fourth free end 1122 of the second sub-radiator 112, and the current strength of the second resonant current is located at the center of the second sub-radiator 112. In the figure, the second resonant current flows from the third free end 1121 to the fourth free end 1122 of the second sub-radiator 112. Correspondingly, as can be seen from the figure, when the second sub-radiator 112 supports the second target frequency band, a resonant circuit is also generated on the first sub-radiator 111, and a resonant current is also generated on the ground electrode 220. Judging from the distribution of the second resonant current, the second resonant mode is a half-wavelength dipole mode, which can also be regarded as a transmission line mode.

[0064] Understandably, the second resonant current is periodically changing. In the current half-wavelength mode, the second resonant current flows from the third free end 1121 of the second sub-radiator 112 to the fourth free end 1122. In the next half-wavelength cycle, the second resonant current... Figure 9The direction of the second resonant current in the current half-wavelength period is opposite to that shown. Specifically, in the next half-wavelength period, the second resonant current flows from the fourth free end 1122 of the second sub-radiator 112 to the third free end 1121 of the second sub-radiator 112. Correspondingly, when the antenna assembly 10 supports the second target frequency band, the resonant current of the first sub-radiator 111 and the resonant current of the ground electrode 220 are also periodically changing. Specifically, in the next half-wavelength period: the direction of the resonant current of the first sub-radiator 111 is opposite to that shown. Figure 10 The direction of the resonant current of the first sub-radiator 111 in the current half-wavelength period is opposite to that shown; the direction of the resonant current of the ground electrode 220 is opposite to that shown. Figure 10 The direction of the resonant current at ground pole 220 during the current half-wavelength period is opposite.

[0065] The performance of the antenna assembly 10 in the first target frequency band and the second target frequency band will be described later in conjunction with the reflection coefficient curve and radiation performance curve of the antenna assembly 10.

[0066] Please see Figure 11 and Figure 12 , Figure 11 A schematic diagram showing the location of the first connection point of the first sub-radiator in a wearable electronic device; Figure 12 This is a schematic diagram showing the location of the second connection point of the second sub-radiator in a wearable electronic device. The first sub-radiator 111 has a first connection point Pa, which is located in a first central region 111c. The first central region 111c is a region centered on the first midpoint O1 of the first sub-radiator 111 with a radius of 0.1λ1, where λ1 is the wavelength corresponding to the center frequency of the first target frequency band. The second sub-radiator 112 has a second connection point Pb, which is located in a second central region 112b. The second central region 112b is a region centered on the second midpoint O2 of the second sub-radiator 112 with a radius of 0.1λ2, where λ2 is the wavelength corresponding to the center frequency of the second target frequency band. The antenna assembly 10 also includes a conductive connector 120. One end of the conductive connector 120 is electrically connected to the first connection point Pa, and the other end of the conductive connector 120 is electrically connected to the second connection point Pb.

[0067] The conductive connector 120 can be, but is not limited to, a metal connecting piece or a metal connecting wire. As described above regarding the first resonant current corresponding to the first resonant mode, the strongest point of the first resonant current is located at the center of the first sub-radiator 111, i.e., at the first midpoint O1. The first resonant current has the largest value at the first midpoint O1. The first central region 111c is a region with a radius of 0.1λ1 centered at the first midpoint O1 of the first sub-radiator 111; therefore, the current values ​​of the first resonant current within the first central region 111c are all relatively large.

[0068] Accordingly, as described above regarding the second resonant current corresponding to the second resonant mode, the strongest point of the second resonant current is located at the center of the second sub-radiator 112, that is, at the second midpoint O2. The current value of the second resonant current is the largest at the second midpoint O2. The second central region 112b is the area with a radius of 0.1λ2 centered on the second midpoint O2 of the second sub-radiator 112. Therefore, the current value of the second resonant current within the second central region 112b is relatively large.

[0069] The first connection point Pa is located in the first central region 111c, and the second connection point Pb is located in the second central region 112b. One end of the conductive connector 120 is electrically connected to the first connection point Pa, and the other end of the conductive connector 120 is electrically connected to the second connection point Pb. Therefore, the placement of the conductive connector 120 at the first connection point Pa of the first sub-radiator 111 and the placement of the conductive connector 120 at the second connection point Pb of the second sub-radiator 112 can reduce or even avoid the influence of the conductive connector 120 on the first resonant current of the first sub-radiator 111 and the influence of the conductive connector 120 on the second resonant current of the second sub-radiator 112, so that the antenna assembly 10 of the wearable device has better antenna performance in the first target frequency band and the second target frequency band. Furthermore, the conductive connector 120 is positioned at the first connection point Pa of the first sub-radiator 111 and at the second connection point Pb of the second sub-radiator 112. This allows the feed source S to better excite the first resonant mode of the first sub-radiator 111 and to better excite the second resonant mode of the second sub-radiator 112. Consequently, the antenna assembly 10 has better communication performance in the first target frequency band and in the second target frequency band.

[0070] In one embodiment, the first sub-radiator 111 and the second sub-radiator 112 are symmetrical about an axis. This allows the first midpoint O1 of the first sub-radiator 111 to align with the second midpoint O2 of the second sub-radiator 112. With a fixed gap between the first sub-radiator 111 and the second sub-radiator 112, the conductive connector 120 has the shortest possible size. This saves space in the conductive connector 120, making the connection between the first sub-radiator 111 and the second sub-radiator 112 easier, improving the reliability of the connection between the conductive connector 120 and the first connection point Pa of the first sub-radiator 111, and also improving the reliability of the connection between the conductive connector 120 and the second connection point Pb of the second sub-radiator 112.

[0071] Further, please refer to Figure 11 The power supply point P is located in the first central region 111c.

[0072] In this embodiment, the location of the feed point P can effectively excite the first resonant mode of the first sub-radiator 111, thereby enabling the antenna assembly 10 to have better communication performance in the first target frequency band.

[0073] In this embodiment, the feed point P is spaced apart from the first connection point Pa. The feed point P is closer to the second free end 1112 of the first sub-radiator 111. It can be understood that in other embodiments, the feed point P is closer to the first free end 1111 of the first sub-radiator 111. Alternatively, in other embodiments, the feed point P is located at the first midpoint O1. The position of the feed point P shown in the schematic diagram of this embodiment should not be construed as a limitation on the position of the feed point P provided in this application embodiment.

[0074] Please see Figure 13 , Figure 13 A schematic diagram illustrating the gap dimensions between the second sub-radiator and the first sub-radiator in one embodiment of a wearable electronic device. Figure 13 (b) in the middle is Figure 13 (a) is an enlarged schematic diagram at point A. In the first direction D11, the gap dimension Da between the second sub-radiator 112 and the first sub-radiator 111 satisfies: 1.5mm ≤ Da ≤ 10mm.

[0075] In the first direction D11, the gap dimension Da between the second sub-radiator 112 and the first sub-radiator 111 can be, but is not limited to, 1.5mm, or 2.0mm, or 2.5mm, or 3.0mm, or 3.5mm, or 4.0mm, or 4.5mm, or 5.0mm, or 5.5mm, or 6.0mm, or 6.5mm, or 7.0mm, or 7.5mm, or 8.0mm, or 8.5mm, or 9.0mm, or 9.5mm, or 10mm.

[0076] In the first direction D11, when the gap size Da between the second sub-radiator 112 and the first sub-radiator 111 is too small, the radiation performance of the antenna assembly 10 in both the first and second target frequency bands is poor. Conversely, when the gap size Da between the second sub-radiator 112 and the first sub-radiator 111 is too large in the first direction D11, it will induce at least one of the second sub-radiator 112 and the first sub-radiator 111 to generate other modes, thereby reducing the antenna efficiency in both the first and second target frequency bands. The wearable electronic device 1 provided in this application, in the first direction D11, has a gap size Da between the second sub-radiator 112 and the first sub-radiator 111 satisfying: 1.5mm ≤ Da ≤ 10mm, ensuring that the gap size between the second sub-radiator 112 and the first sub-radiator 111 is neither too large nor too small, thus enabling the antenna assembly 10 to have good antenna efficiency and good radiation performance in both the first and second target frequency bands.

[0077] Please see Figure 14 , Figure 14 for Figure 3 The diagram illustrates the lengths of the first and second sub-radiators in the wearable electronic device. The length L of the first sub-radiator 111 is shown. 01 Satisfies: 0.4λ1≤L 01 ≤0.6λ1, where λ1 is the wavelength corresponding to the center frequency of the first target frequency band. The length L of the second sub-radiator 112 02 Satisfies: 0.4λ²≤L 02 ≤0.6λ2, where λ2 is the wavelength corresponding to the center frequency point of the second target frequency band.

[0078] The length of the first sub-radiator 111 refers to its dimension in the extending direction. The length L of the first sub-radiator 111 01 Satisfies: 0.4λ1≤L 01 ≤0.6λ1, for example, L 01It can be, but is not limited to, 0.4λ1, or 0.45λ1, or 0.50λ1, or 0.55λ1, or 0.60λ1.

[0079] In this embodiment, the length L of the first sub-radiator 111 01 Satisfies: 0.4λ1≤L 01 ≤0.6λ1, in other words, the length L of the first sub-radiator 111 01 Satisfies: (0.5-0.1)λ1≤L 01 ≤(0.5+0.1)λ1. Therefore, the length L of the first sub-radiator 111 is... 01 It is half, or approximately half, of the center frequency of the first target frequency band corresponding to the first resonant mode of the first sub-radiator 111. That is, the length L of the first sub-radiator 111... 01 It is half or approximately half of the equivalent electromagnetic wave wavelength of the fundamental mode operating frequency. It should be noted that when λ1 is the wavelength corresponding to the center frequency point of the first target frequency band, the influence of the medium of the wearable electronic device 1 is taken into account.

[0080] In this embodiment, the length L of the first sub-radiator 111 01 Satisfies: 0.4λ1≤L 01 ≤0.6λ1, where λ1 is the wavelength corresponding to the center frequency of the first target frequency band. The size of the first sub-radiator 111 can be well matched with the length required for the first target frequency band supported by the first sub-radiator 111, so that the first sub-radiator 111 can better support the first target frequency band.

[0081] Accordingly, the length of the second sub-radiator 112 refers to the dimension of the second sub-radiator 112 in the extending direction. The length L of the second sub-radiator 112 02 Satisfies: 0.4λ²≤L 02 ≤0.6λ², for example, L 02 It can be, but is not limited to, 0.4λ², or 0.45λ², or 0.50λ², or 0.55λ², or 0.60λ².

[0082] In this embodiment, the length L of the second sub-radiator 112 02 Satisfies: 0.4λ²≤L 02 ≤0.6λ2, in other words, the length L of the second sub-radiator 112 02 Satisfies: (0.5-0.1)λ²≤L 02 ≤(0.5+0.1)λ2. Therefore, the length L of the second sub-radiator 112 is... 02It is half, or approximately half, of the center frequency of the second target frequency band corresponding to the first resonant mode of the second sub-radiator 112. That is, the length L of the second sub-radiator 112... 02 It is half or approximately half of the equivalent electromagnetic wave wavelength of the fundamental mode operating frequency. It should be noted that when λ2 is the wavelength corresponding to the center frequency point of the second target frequency band, the influence of the medium of the wearable electronic device 1 is taken into account.

[0083] In this embodiment, the length L of the second sub-radiator 112 02 Satisfies: 0.4λ²≤L 02 ≤0.6λ2, where λ2 is the wavelength corresponding to the center frequency point of the second target frequency band. The size of the second sub-radiator 112 can be well matched with the length required for the second target frequency band supported by the second sub-radiator 112, so that the second sub-radiator 112 can better support the second target frequency band.

[0084] Please see Figure 15 , Figure 16 , Figure 17 and Figure 18 , Figure 15 This is a partial schematic diagram of a wearable electronic device according to one embodiment; Figure 16 This is a partial schematic diagram of a wearable electronic device according to another embodiment; Figure 17 This is a partial schematic diagram of a wearable electronic device according to yet another embodiment; Figure 18 This is a partial schematic diagram of a wearable electronic device according to another embodiment. The length of the first sub-radiator 111 is greater than the length of the second sub-radiator 112. The ground electrode 220 includes a first end 221 and a second end 222. The first end 221 is disposed corresponding to the first free end 1111, and the second end 222 is disposed corresponding to the second free end 1112. The first end 221 and the second end 222 form a third opening 220a. The radial projection of the first end 221 is flush with or protrudes from the radial projection of the first free end 1111. When the first end 221 protrudes from the radial projection of the first free end 1111, the protrusion length D1 satisfies: 0 < D1 ≤ 0.1λ1, where λ1 is the wavelength corresponding to the center frequency point of the first target frequency band. The radial projection of the second end 222 is flush with or protrudes from the radial projection of the second free end 1112. When the second end 222 protrudes from the radial projection of the second free end 1112, the protrusion length D2 satisfies: 0 < D2 ≤ 0.1λ1, where λ1 is the wavelength corresponding to the center frequency point of the first target frequency band.

[0085] As can be seen from the previous description of the relationship between the frequency of the first target frequency band supported by the first sub-radiator 111 and the frequency of the second target frequency band supported by the second sub-radiator 112, as well as the introduction of the first resonant mode and the second resonant mode, the length of the first sub-radiator 111 is greater than the length of the second sub-radiator 112.

[0086] In this embodiment, the ground electrode 220 is arc-shaped or similar to an arc when viewed from the side. In this embodiment, the two ends of the ground electrode 220 in the extending direction are a first end 221 and a second end 222, respectively.

[0087] exist Figure 15 In this configuration, the radial projection of the first end 221 is flush with the radial projection of the first free end 1111, and the radial projection of the second end 222 is flush with the radial projection of the second free end 1112. Figure 16 In this configuration, the radial projection of the first end 221 protrudes beyond the radial projection of the first free end 1111, with a protrusion length D1 satisfying: 0 < D1 ≤ 0.1λ1; and the radial projection of the second end 222 is flush with the radial projection of the second free end 1112. Figure 17 In this configuration, the radial projection of the first end 221 is flush with the radial projection of the first free end 1111; the radial projection of the second end 222 protrudes beyond the radial projection of the second free end 1112, with a protrusion length D2 satisfying: 0 < D2 ≤ 0.1λ1. Figure 18 In the first end 221, the radial projection of the first end 221 protrudes beyond the radial projection of the first free end 1111, and the protrusion length D1 satisfies: 0 < D1 ≤ 0.1λ1; the radial projection of the second end 222 protrudes beyond the radial projection of the second free end 1112, and the protrusion length D2 satisfies: 0 < D2 ≤ 0.1λ1.

[0088] In this embodiment, when the first end 221 protrudes radially beyond the radial projection of the first free end 1111, the protrusion length D1 can be, but is not limited to, 0.01λ1, or 0.02λ1, or 0.03λ1, or 0.04λ1, or 0.05λ1, or 0.06λ1, or 0.07λ1, or 0.08λ1, or 0.09λ1, or 0.1λ1.

[0089] In this embodiment, when the second end 222 protrudes radially beyond the radial projection of the second free end 1112, the protrusion length D2 can be, but is not limited to, 0.01λ2, or 0.02λ2, or 0.03λ2, or 0.04λ2, or 0.05λ2, or 0.06λ2, or 0.07λ2, or 0.08λ2, or 0.09λ2, or 0.1λ2.

[0090] If the size of the ground electrode 220 of the motherboard 20 is too large, an antenna with the ground electrode 220 of the motherboard 20 as the main mode will be generated, which will lead to a decrease in the antenna performance and radiation performance of the antenna assembly 10 in the first target frequency band and the second target frequency band. The radial projection of the first end 221 is flush with or protrudes from the radial projection of the first free end 1111. When the first end 221 protrudes from the radial projection of the first free end 1111, the protrusion length D1 satisfies: 0 < D1 ≤ 0.1λ1; in other words, the radial projection of the first end 221 is flush with or slightly protrudes from the radial projection of the first free end 1111. The radial projection of the second end 222 is flush with or protrudes from the radial projection of the second free end 1112. When the radial projection of the second end 222 protrudes from the radial projection of the second free end 1112, the protrusion length D2 satisfies: 0 < D2 ≤ 0.1λ1. In other words, the radial projection of the second end 222 is flush with or slightly protrudes from the radial projection of the second free end 1112. Therefore, the above-described relationship between the ground electrode 220 of the motherboard 20 and the first sub-radiator 111 of the wearable electronic device 1 provided in this application embodiment can avoid the ground electrode 220 of the motherboard 20 being too large, thereby avoiding the generation of an antenna with the ground electrode 220 as the dominant mode due to the excessive size of the ground electrode 220. If the ground electrode 220 is significantly larger than the first sub-radiator 111, it will cause a significant decrease in the performance of the antenna assembly 10 of the wearable electronic device 1 provided in this application embodiment in the first target frequency band and the second target frequency band. Therefore, the above-described relationship between the ground electrode 220 and the first sub-radiator 111 of the wearable electronic device 1 provided in this application embodiment enables the antenna assembly 10 to have better antenna performance and radiation performance in the first target frequency band and the second target frequency band.

[0091] Please see Figure 19 , Figure 19 for Figure 15 A schematic diagram showing the distance between the ground electrode and the radiator in a wearable electronic device in the second direction. Figure 19 (b) in the middle is Figure 19(a) is an enlarged view at point II. It can be understood that when illustrating the distance between the ground pole 220 and the radiator 110 in the second direction D22, it is... Figure 15 The wearable electronic device 1 shown is illustrated as an example. It should be understood that this should not be construed as a limitation on the embodiments of this application. The distance relationship between the ground pole 220 and the radiator 110 in the second direction D22 can also be applied to the wearable electronic device 1 provided in any of the preceding embodiments, for example, Figure 16 , Figure 17 See the attached figures. In this embodiment, the distance d between the ground pole 220 and the radiator 110 in the second direction D22 satisfies: 1.5mm ≤ d ≤ 10mm.

[0092] The distance d between the ground pole 220 and the radiator 110 in the second direction D22 (i.e., the stacking direction) can be, but is not limited to, 1.5 mm, or 2.0 mm, or 2.5 mm, or 3.0 mm, or 3.5 mm, or 4.0 mm, or 4.5 mm, or 5.0 mm, or 5.5 mm, or 6.0 mm, or 6.5 mm, or 7.0 mm, or 7.5 mm, or 8.0 mm, or 8.5 mm, or 9.0 mm, or 9.5 mm, or 10.0 mm.

[0093] When the distance d between the ground electrode 220 and the radiator 110 in the second direction D22 is small, the efficiency of both the first and second target frequency bands is low. When the distance d between the ground electrode 220 and the radiator 110 in the second direction D22 is large, the efficiency of both the first and second target frequency bands is high. However, the wearable electronic device 1 is larger and heavier. In this embodiment, the distance d between the ground electrode 220 and the radiator 110 in the second direction D22 satisfies: 1.5mm ≤ d ≤ 10mm. This ensures high radiation efficiency for both the first and second target frequency bands while also meeting the design requirements for miniaturization of the wearable electronic device 1.

[0094] Please see Figure 20 , Figure 20 This is yet another embodiment of the present application. Figure 1 The diagram shows a cross-sectional view of the wearable electronic device along line II. The motherboard 20 also includes a support substrate 210. The support substrate 210 supports the ground electrode 220 and the feed source S. The wearable electronic device 1 also includes a detection sensor 40. The detection sensor 40 is disposed on the support substrate 210 and is used to detect the user's target parameters when the wearable electronic device 1 is worn on the user's target part 3.

[0095] The motherboard 20 can also be referred to as the main circuit board. The carrier substrate 210 may include one or more insulating layers. The ground electrode 220 is supported on the carrier substrate 210 and may be, but is not limited to, disposed on the surface of the carrier substrate 210 near the first sub-radiator 111, disposed on the surface of the carrier substrate 210 away from the first sub-radiator 111, or embedded in the carrier substrate 210.

[0096] In this embodiment, the ground electrode 220 is supported on the carrier substrate 210 of the motherboard 20. Therefore, there is no need to set an additional support structure in the wearable electronic device 1 to support the ground electrode 220, which is beneficial to the miniaturization of the wearable electronic device 1.

[0097] The feed source S is disposed on the carrier substrate 210. The feed source S can be electrically connected to the feed point P of the first sub-radiator 111 through a transmission line disposed on the carrier substrate 210; or, the feed source S can be electrically connected to the feed point P of the first sub-radiator 111 through a feed component (such as a conductive spring, conductive adhesive, or conductive screw).

[0098] The detection sensor 40 can be, but is not limited to, a blood pressure sensor or a pulse sensor. When the detection sensor 40 is a blood pressure sensor, the target parameter is blood pressure, and when the wearable electronic device 1 is worn on the target site 3, the detection sensor 40 can detect the user's blood pressure. When the detection sensor 40 is a pulse sensor, the target parameter is pulse. When the wearable electronic device 1 is worn on the target site 3, the detection sensor 40 can detect the user's pulse.

[0099] In this embodiment, the wearable electronic device 1 further includes a detection sensor 40, which is used to detect the user's target parameters when the wearable electronic device 1 is worn on the user's target part 3, thereby enabling the wearable electronic device 1 to integrate more functions.

[0100] Please see Figure 21 , Figure 21 This is a schematic diagram of an equivalent circuit for a wearable electronic device according to another embodiment of this application. In this embodiment, the antenna assembly 10 further includes a matching circuit M. The feed source S is electrically connected to the feed point P through the matching circuit M.

[0101] The matching circuit M is also called the matching network. The matching circuit M is used for impedance matching between the feed S and the first sub-radiator 111, and is used to match the output impedance of the feed S with the input impedance of the first sub-radiator 111, so that the antenna assembly 10 has better antenna performance in the first target frequency band and the second target frequency band.

[0102] The antenna assembly 10 further includes a matching circuit M, which can be incorporated into the antenna assembly 10 provided in any of the preceding embodiments. In the schematic diagram of this embodiment, the antenna assembly 10 further includes a matching circuit M incorporated into the antenna assembly 10 provided in a preceding embodiment as an example. It should be understood that this should not be construed as a limitation on the antenna assembly 10 provided in the embodiments of this application.

[0103] Furthermore, combined Figure 1 , Figure 2 As shown in the accompanying drawings, the wearable electronic device 1 also includes a wearable body 30. The wearable body 30 is used to carry the radiator 110 and is worn on a target part 3 of the user.

[0104] In one embodiment, when the electronic device 1 further includes a motherboard 20, the wearable body 30 is also used to support the motherboard 20.

[0105] The wearable body 30, also known as an appearance decoration, can be made of insulating materials such as plastic or silicone, to avoid blocking electromagnetic wave signals in the first and second target frequency bands supported by the antenna assembly 10.

[0106] The wearable body 30 is used to carry the radiator 110. Normally, the radiator 110 is disposed inside the wearable body 30, but it is not limited to this. When the radiator 110 is disposed inside the wearable body 30, the wearable body 30 is used to protect the radiator 110.

[0107] Further, please refer to Figure 1 and Figure 22 , Figure 22 A perspective view of a wearable electronic device provided for another embodiment of this application. Figure 22 and Figure 1 The difference in (a) is that in Figure 22 The diagram shows the sign part 321. Figure 22The cross-sectional view of the wearable electronic device 1 provided herein can be referred to the preceding cross-sectional view. The wearable body 30 has a wearing hole 310 for accommodating a target part 3 of the user. The wearable body 30 also has an inner wall surface 310a defining the wearing hole 310 and an outer surface 320a facing away from the inner wall surface 310a. The outer surface 320a has a marking portion 321 corresponding to the part of the radiator 110; or the wearable electronic device 1 further includes a marking portion 321, which is disposed on the outer surface 320a of the wearable body 30 corresponding to the wearing hole 310.

[0108] When the wearable electronic device 1 is worn on the user's target area 3, the wearable electronic device 1 can be fitted onto the user's target area 3, and the wearing hole 310 of the wearable body 30 accommodates the target area 3. The inner wall surface 310a of the wearable body 30 is closer to the target area 3 than the outer surface 320a. When the wearable electronic device 1 is worn on the user's target area 3, the inner wall surface 310a can either fit snugly against the target area 3 or have a gap with the target area 3, which is not limited here.

[0109] The outer surface 320a has a marking portion 321 corresponding to the radiator 110. For example, the marking portion 321 can be a pattern, text, or groove provided on the outer surface 320a. When the wearable electronic device 1 also includes the marking portion 321, the marking portion 321 can also be a gemstone or artificial gemstone.

[0110] The marking portion 321 is used to indicate the position of the radiator 110, so that when the wearable electronic device 1 is worn on the target part 3, it has good communication performance in the first target frequency band and the second target frequency band. For example, when the wearable electronic device 1 is a ring, the marking portion 321 is provided on the outer surface 320a at the midpoint of the first sub-radiator 111 or at a position near the midpoint of the first sub-radiator 111. In this way, it can instruct the user to ensure that the front of the first sub-radiator 111 corresponds to the front of the finger when wearing the wearable electronic device 1, avoiding the first sub-radiator 111 and the second sub-radiator 112 being blocked by other fingers, thereby ensuring the communication performance of the antenna assembly 10 in the first target frequency band and the second target frequency band.

[0111] In conjunction with the wearable electronic device 1 provided in any of the preceding embodiments, in one embodiment, the first target frequency band includes the GPS L1 frequency band, and the second target frequency band includes the Bluetooth frequency band. The inclusion of the GPS L1 frequency band in the first target frequency band and the Bluetooth frequency band in the second target frequency band enables the wearable electronic device 1 to meet the communication requirements of both the GPS L1 frequency band and the Bluetooth frequency band.

[0112] In another embodiment, the first target frequency band includes the GPS L1 band, and the second target frequency band includes the WiFi 2.4G band. The inclusion of the GPS L1 band in the first target frequency band and the WiFi 2.4G band in the second target frequency band enables the wearable electronic device 1 to meet the communication requirements of both the GPS L1 band and the WiFi 2.4G band.

[0113] In another embodiment, the first target frequency band includes the GPS L5 band, and the second target frequency band includes the Bluetooth band. The inclusion of both the GPS L5 and Bluetooth bands enables the wearable electronic device 1 to meet the communication requirements of both the GPS L5 and Bluetooth bands.

[0114] In another embodiment, the first target frequency band includes a satellite communication frequency band for communication with BeiDou, and the second target frequency band includes a Bluetooth frequency band. The inclusion of a satellite communication frequency band for communication with BeiDou and a Bluetooth frequency band in the first target frequency band enables the wearable electronic device 1 to meet the communication requirements of both the GPS L5 frequency band and the Bluetooth frequency band.

[0115] The performance of the antenna assembly 10 of the wearable electronic device 1 provided in one embodiment of this application will be simulated and explained below.

[0116] Please see Figure 23 and Figure 24 , Figure 23 S-parameter curves of an antenna assembly for a wearable electronic device provided in one embodiment of this application, when the wearable electronic device is in free space and in a wearing state; Figure 24 This is a schematic diagram comparing the radiation performance of an antenna assembly for a wearable electronic device according to an embodiment of this application, when the wearable electronic device is in free space and in a worn state. Figure 23 and Figure 24 In this simulation, the first target frequency band is used as the GPS L1 band, and the second target frequency band is used as the Bluetooth band. For ease of illustration, Figure 23 (a) in the image is in color. Figure 23 (b) in the middle is Figure 23 The grayscale image of (a) in the image. Figure 23 In this context, the S-parameter curve is also called the reflection coefficient curve. Figure 23 In the graph, the horizontal axis represents frequency in GHz, and the vertical axis represents S-parameters in dB. Figure 23 The red curve in (a) is the S-parameter curve of the wearable electronic device 1 when it is in the wearing state. Figure 23 The green curve in (a) represents the S-parameter curve of the wearable electronic device 1 in free space. It can be seen that the reflection coefficient curves of the wearable electronic device 1 in the wearing state and in free space remain essentially unchanged, and the impedance bandwidth of the wearable electronic device 1 in the wearing state is slightly better than that in the free space state.

[0117] For ease of illustration, Figure 24 (a) in the image is in color. Figure 24 (b) in the middle is Figure 24 The grayscale image of (a) in the image. Figure 24 In the graph, the horizontal axis represents frequency in GHz, and the vertical axis represents efficiency in dB. Figure 24 In the middle, curve ① (i.e., Figure 24 (a) The red solid line in the figure represents the radiation efficiency curve of the wearable electronic device 1 when it is in the wearing state; Figure 24 In the middle, curve ② (i.e., Figure 24 (a) The blue solid line in the figure represents the radiation efficiency curve of the wearable electronic device 1 in free space; Figure 24 In the middle, curve ③ (i.e., Figure 24 The red dashed line in (a) represents the system efficiency curve of the wearable electronic device 1 when it is in the wearing state; Figure 24 In the middle, curve ④ (i.e., Figure 24 The blue dashed line in (a) represents the system efficiency curve of the wearable electronic device 1 in free space. Figure 24 It can be seen that in the first target frequency band: compared with the wearable electronic device 1 being in free space, the average system efficiency of the wearable electronic device 1 when it is in the wearing state reaches -9.7dB, the system efficiency is slightly reduced, specifically, the system efficiency is reduced by about 1dB.

[0118] Accordingly, by Figure 24As can be seen, in the second target frequency band, compared to when the wearable electronic device 1 is in free space, the average system efficiency of the wearable electronic device 1 when it is in a worn state reaches -11dB, a decrease of approximately 5.5dB. This is because when the second sub-radiator 112 supports the second target frequency band, the resonant current present on the first sub-radiator 111 and the second sub-radiator 112 generates a certain transverse electric field component, resulting in a relatively large absorption ratio when the wearable electronic device 1 is worn on the user's target part 3 (e.g., a finger). However, overall, the performance of the antenna assembly 10 of the wearable electronic device 1 in the second target frequency band is still considered excellent.

[0119] Compared to free space, when the wearable electronic device 1 is worn, the radiation efficiency of the antenna assembly 10 of the wearable electronic device 1 increases by 1 dB. When the wearable electronic device 1 is worn: the average system efficiency of the antenna assembly 10 of the wearable electronic device 1 reaches -9 dB in the first target frequency band (in this embodiment, the first target frequency band is the GPS L1 band, a positioning frequency band), and the average system efficiency reaches -11.3 dB in the second target frequency band (in this embodiment, the second target frequency band is the Bluetooth band). Therefore, it can be seen that for the wearable electronic device 1, when it is worn, its performance in both the first and second target frequency bands is superior.

[0120] In summary, the wearable electronic antenna assembly 10 provided in this application can support both a first target frequency band and a second target frequency band using a single feed point. When the first target frequency band is the GPS L1 band and the second target frequency band is the Bluetooth band, the antenna assembly 10 of the wearable electronic device 1 can meet the dual functional requirements of positioning and Bluetooth.

[0121] Specifically, in one embodiment of this application, the antenna assembly 10 of the wearable electronic device 1 supports the first target frequency band using the fundamental mode of the first sub-radiator 111 and supports the second target frequency band using the fundamental mode of the second sub-radiator 112, thus achieving the dual-band operation requirement of the first target frequency band and the second target frequency band.

[0122] In one embodiment of this application, the second sub-radiator 112 is electrically connected to the first sub-radiator 111. Therefore, the excitation signal of the feed source S can be transmitted to the first sub-radiator 111 via the feed point P, and then transmitted to the second sub-radiator 112 via the first sub-radiator 111, thereby enabling the two radiators (also known as dual antennas) to work simultaneously.

[0123] Furthermore, in one embodiment of this application, the length of the first sub-radiator 111 of the antenna assembly 10 in the wearable electronic device 1 is matched with the first target frequency band supported by the first sub-radiator 111, and the length of the second sub-radiator 112 is matched with the second target frequency band supported by the second sub-radiator 112. Therefore, the antenna assembly 10 does not require an additional tuning circuit, thereby occupying a smaller area of ​​the motherboard 20.

[0124] Furthermore, in the wearable electronic device 1 provided in one embodiment of this application, the radial projection of the ground electrode 220 of the motherboard 20 is greater than or slightly greater than the radial projection of the first sub-radiator 111. This avoids the ground electrode 220 of the motherboard 20 being too large, thereby preventing the formation of an antenna with the ground electrode 220 as the dominant mode due to its excessive size. If the ground electrode 220 is significantly larger than the first sub-radiator 111, the performance of the antenna assembly 10 of the wearable electronic device 1 provided in this embodiment of the application will be significantly degraded in the first target frequency band and the second target frequency band. Therefore, the above-described relationship between the ground electrode 220 and the first sub-radiator 111 of the wearable electronic device 1 provided in this embodiment of the application enables the antenna assembly 10 to have better antenna performance and radiation performance in the first target frequency band and the second target frequency band.

[0125] In one embodiment, taking the wearable electronic device 1 as a ring as an example, and taking the first target frequency band as the GPS L1 frequency band and the second target frequency band as the Bluetooth frequency band as an example for simulation, it can be found that the system efficiency of the wearable electronic device 1 in the first target frequency band can reach -9.7dB and the system efficiency in the second target frequency band can reach -11dB when the device is worn. It can be seen that the antenna performance of the wearable electronic device 1 in the first target frequency band and the second target frequency band is excellent when the device is worn.

[0126] The above description represents some embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications are also considered to be within the scope of protection of this application.

Claims

1. A wearable electronic device, comprising: The wearable electronic device comprises an antenna assembly, the antenna assembly comprising: a radiator, the radiator comprising: a first sub-radiator having a first free end, a feed point and a second free end arranged in sequence, the first free end and the second free end forming a first opening; and a second sub-radiator arranged in a first direction and electrically connected to the first sub-radiator, the second sub-radiator having a third free end and a fourth free end, the third free end and the fourth free end forming a second opening; and a feed source electrically connected to the feed point to excite a first resonant mode of the first sub-radiator to support a first target frequency band and a second resonant mode of the second sub-radiator to support a second target frequency band, wherein the first resonant mode is a half-wavelength dipole mode, the second resonant mode is a half-wavelength dipole mode, and a frequency of the second target frequency band is greater than a frequency of the first target frequency band.

2. The wearable electronic device of claim 1, wherein, The first sub-radiator has a first connection point located in a first central region, wherein the first central region is a region with the first midpoint of the first sub-radiator as a center and 0.1λ1 as a radius, λ1 being a wavelength corresponding to a center frequency point of the first target frequency band; The second sub-radiator has a second connection point located in a second central region, wherein the second central region is a region with the second midpoint of the second sub-radiator as a center and 0.1λ2 as a radius, λ2 being a wavelength corresponding to a center frequency point of the second target frequency band; The antenna assembly further comprises: a conductive connecting piece having one end electrically connected to the first connection point and the other end electrically connected to the second connection point.

3. The wearable electronic device of claim 2, wherein, The feed point is located in the first central region.

4. The wearable electronic device of claim 1, wherein, In the first direction, a gap size Da between the second sub-radiator and the first sub-radiator satisfies: 1.5mm≤Da≤10mm.

5. The wearable electronic device of claim 1, wherein, The length L of the first sub-radiator 01 satisfies: 0.4λ1≤L 01 ≤0.6λ1, wherein λ1 is a wavelength corresponding to a center frequency of the first target frequency band. The length L of the second sub-radiator 02 satisfies: 0.4λ2≤ L 02 ≤ 0.6λ2, where λ2 is a wavelength corresponding to a center frequency of the second target frequency band.

6. The wearable electronic device of claim 1, wherein, The wearable electronic device further comprises: a mainboard comprising a ground pole, the ground pole being arranged in a second direction and stacked with the radiator, when the wearable electronic device is worn on a target part of a user, the ground pole is closer to the target part than the radiator, and the ground pole and the radiator are coupled to generate a resonant current to support the first target frequency band and the second target frequency band.

7. The wearable electronic device of claim 6, wherein, The length of the first sub-radiator is greater than the length of the second sub-radiator; The ground pole comprises a first end portion corresponding to the first free end and a second end portion corresponding to the second free end, the first end portion and the second end portion forming a third opening; A projection of the first end portion in a radial direction is flush with or protrudes from a projection of the first free end in the radial direction, when the first end portion protrudes from the projection of the first free end in the radial direction, a protruding length D1 satisfies: 0<D1≤0.1λ1, wherein λ1 is a wavelength corresponding to a center frequency point of the first target frequency band; and The projection of the second end portion in the radial direction is flush with or protrudes from the projection of the second free end in the radial direction, and when the second end portion protrudes from the projection of the second free end in the radial direction, the protruding length D2 satisfies: 0 < D2 ≤ 0.1λ1, wherein λ1 is the wavelength corresponding to the center frequency of the first target frequency band.

8. The wearable electronic device of claim 6, wherein, The distance d between the ground pole and the radiator in the second direction satisfies: 1.5mm ≤ d ≤ 10mm.

9. The wearable electronic device of claim 6, wherein, The main plate further comprises: A carrier substrate for carrying the ground pole and the feed source; The wearable electronic device further comprises: A detection sensor arranged on the carrier substrate, the detection sensor being configured to detect a target parameter of a user when the wearable electronic device is worn on a target part of the user.

10. The wearable electronic device of claim 1, wherein, The wearable electronic device further comprises: A wearable body for carrying the radiator, and the wearable body is configured to be worn on a target part of a user.

11. The wearable electronic device of claim 10, wherein, The wearable body has a wearing hole for accommodating the target part of the user; The wearable body further has an inner wall surface defining the wearing hole and an appearance surface facing away from the inner wall surface; The appearance surface has an identification portion corresponding to the radiator; or the wearable electronic device further comprises an identification portion arranged on the appearance surface of the wearable body corresponding to the wearing hole.

12. The wearable electronic device of claim 1, wherein, The first target frequency band includes a GPS L1 frequency band, and the second target frequency band includes a Bluetooth frequency band; or the first target frequency band includes a GPS L1 frequency band, and the second target frequency band includes a WiFi 2.4G frequency band; or the first target frequency band includes a GPS L5 frequency band, and the second target frequency band includes a Bluetooth frequency band; or the first target frequency band includes a satellite communication frequency band for communication with Beidou, and the second target frequency band includes a Bluetooth frequency band.

13. The wearable electronic device of claim 1, wherein The antenna assembly further comprises: A matching circuit, and the feed source is electrically connected to the feed point through the matching circuit.

Images