Wearable device

Abstract

The invention provides a wearable device (100). The wearable device (100) comprises a display screen (10), a bottom shell (20), a first circuit board (30) and a first feed source (V1), the bottom shell (20) comprises a first conductor (21), and the first conductor (21) comprises a first feeding point (F1); the first circuit board (30) is located between the first conductor (21) and the display screen (10), and the first circuit board (30) comprises a first conductor layer (31); the first feed source (V1) is arranged on the first circuit board (30), and the first feed source (V1) is electrically connected with the first feeding point (F1); the first conductor (21) and the first circuit board (30) are arranged at an interval; the first feed source (V1) is used for exciting the first antenna structure (A1) through the first feed point (F1) to generate a first electromagnetic wave signal, and the first antenna structure (A1) is at least composed of a first conductor (21) and a first conductor layer (31) of the first circuit board (30). The antenna performance of the wearable device (100) worn by a human body is improved by reducing the deterioration influence of the human body wearing on the antenna performance under the condition that the screen ratio is higher and higher.

Description

Wearable devices

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on December 21, 2023, with application number 202311777425.9 and application name “Wearable Device,” the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of electronic equipment, and in particular to a wearable device. Background Art

[0003] As the screen-to-body ratio of electronic devices continues to increase, the gap between the bezel and the screen is required to become smaller and smaller. However, this makes it increasingly difficult for the electromagnetic wave signals generated by the antenna components excited by the screen to radiate from the gap between the bezel and the screen, resulting in poor antenna performance. Therefore, how to design antennas with a higher screen-to-body ratio becomes very important.

[0004] Furthermore, because the human body is a dielectric, when a wearable device is placed close to it, it will absorb the wearable device's electromagnetic energy, deteriorating the wearable device's antenna performance. According to electromagnetic field boundary condition theory, since the human body is a dielectric with a high dielectric constant, the tangential component of the electric field relative to the human body surface is more likely to enter the body and be absorbed, while the normal component of the electric field relative to the human body surface is less likely to enter the body and thus be less likely to be absorbed. Therefore, designing an antenna with an electric field distribution normal to the human body surface can minimize the impact of human absorption and may even enhance antenna performance. This effectively addresses the problem of antenna performance degradation caused by human absorption when a wearable device is worn.

[0005] Summary of the Invention

[0006] To this end, the present application provides a wearable device to reduce signal attenuation and thereby increase signal coverage.

[0007] The present application provides a wearable device, comprising: a display screen, a bottom housing, a first circuit board, and a first feed source; the bottom housing including a first conductor, the first conductor including a first feed point; the first circuit board located between the first conductor and the display screen, the first circuit board including a first conductor layer; the first feed source disposed on the first circuit board, the first feed source being electrically connected to the first feed point; the first conductor being spaced apart from the first circuit board; the first feed source being configured to excite a first antenna structure via the first feed point to generate a first electromagnetic wave signal, wherein the first antenna structure is comprised of at least the first conductor and the first conductor layer of the first circuit board. Because the bottom housing includes the first conductor, rather than generating the electromagnetic wave signal by stimulating a metal layer on the display screen, the electromagnetic wave signal need not be radiated entirely through a gap beside the display screen. Instead, a gap for radiating the first electromagnetic wave signal can be provided between the display screen and the bottom housing. Consequently, as the screen-to-body ratio increases, the size of the gap for radiating the first electromagnetic wave signal is not affected, thereby reducing attenuation of the first electromagnetic wave signal and thereby increasing the radiation efficiency of the first electromagnetic wave signal.

[0008] In one possible embodiment, at least a portion of the first conductor is parallel to the first circuit board. When the wearable device is worn, the bottom housing is in close contact with human skin. The bottom housing includes a first conductor, and the first antenna structure is composed of at least the first conductor and the first conductor layer of the first circuit board. The first feed source is used to excite the first antenna structure to generate a first electromagnetic wave signal via the first feed point. At least a portion of the first conductor is parallel to the first circuit board. Therefore, when the first feed source excites the first antenna structure to generate the first electromagnetic wave signal via the first feed point, it excites the first antenna structure to generate an electric field perpendicular to at least a portion of the first conductor and the first circuit board. Since the first conductor is disposed on the bottom housing, the first conductor is also substantially parallel to the bottom housing. Therefore, when the wearable device is worn, the electric field generated by the first antenna structure is normal to the human body, that is, perpendicular to the skin surface of the part of the human body where the wearable device is worn. Since the human body does not readily absorb normal electric fields, that is, electric fields perpendicular to the human body surface, this reduces the attenuation of the first electromagnetic wave signal and increases its coverage compared to generating a tangential electric field.

[0009] In one possible implementation, the first antenna structure is a cavity antenna structure or a patch antenna structure. Since both the cavity antenna structure and the patch antenna structure can concentrate the first electromagnetic wave signal, the radiation directionality can be optimized and the radiation efficiency can be enhanced.

[0010] In one possible implementation, the resonant frequency of the first antenna structure is determined based on at least the length of the long side and / or the short side of the first conductor. Thus, the resonant frequency of the first antenna structure can be adjusted to a target resonant frequency by adjusting the length of the long side and / or the short side of the first conductor.

[0011] In one possible embodiment, the wearable device further includes a second feed source and a frame, the frame including a second conductor; the second conductor including a second feeding point; the frame is disposed between the display screen and the bottom housing, with a gap between the second conductor and the first conductor; the second feed source is electrically connected to the second feeding point, and the second feed source is used to excite the second conductor to generate a second electromagnetic wave signal via the second feeding point. This allows full utilization of the frame structure of the wearable device; the frame not only provides support, but the second feed source can also excite the second conductor on the frame to generate a second electromagnetic wave signal, achieving multiple functions.

[0012] In one possible implementation, the gap between the second conductor and the first conductor is sufficient to allow at least the first electromagnetic wave signal to radiate from the wearable device. As screen-to-body ratios increase, there is no need to reduce the gap between the second conductor and the first conductor. Therefore, the size of the gap between the second conductor and the first conductor can be appropriately set to avoid attenuation of the first electromagnetic wave signal due to a reduction in the gap size, thereby reducing the coverage range of the first electromagnetic wave signal.

[0013] In one possible embodiment, the first conductor is partially electrically connected to the first conductor layer of the first circuit board. When the wearable device is worn, the bottom shell is close to human skin. The bottom shell includes a first conductor, and a gap is provided between the second conductor and the first conductor. The gap between the second conductor and the first conductor allows at least the first electromagnetic wave signal to be radiated from the wearable device. However, in some scenarios, for example, when the wearable device is worn tightly on the human body, it may be squeezed by the human body, causing the wearable device to partially sink into the skin. This in turn causes the gap between the second conductor and the first conductor to be blocked by the corresponding portion sunken into the skin. Since the human body is a dielectric, the human body affects the electric field generated by the first antenna structure by shielding or blocking the gap. The first conductor is partially electrically connected to the first conductor layer of the first circuit board (direct short-circuit connection or connection via a low-impedance lumped or distributed device), thereby eliminating or reducing the effect of the human body blocking the gap on the electric field generated by the first antenna structure. Therefore, when the wearable device is partially sunken into the skin, good radiation performance can still be ensured.

[0014] In one possible implementation, the first conductor and the second conductor are partially electrically connected (either directly short-circuited or connected via a low-impedance lumped or distributed device). This is equivalent to a short circuit, thereby eliminating or reducing the effect of the human body blocking the gap on the electric field generated by the first antenna structure. Therefore, even when the wearable device is partially recessed in the skin, it can still maintain good radiation performance.

[0015] In one possible embodiment, the bottom shell further includes a bottom shell body; the first conductor is a metal sheet disposed on the bottom shell body; or, the first conductor is a metal layer formed on the inner and / or outer surface of the bottom shell body through a manufacturing process. Because the first conductor contributes to the first antenna structure, the shape and structure of the first conductor are subject to specific requirements to improve radiation performance. Since the bottom shell includes the bottom shell body, the structure of the bottom shell body allows for more diverse designs, thereby better adapting to the design requirements of the wearable device.

[0016] In one possible embodiment, the first feeding point is disposed in an edge region or a middle region of the first conductor. Since the first feeding point is disposed in a different mode when disposed in an edge region than when disposed in a middle region of the first conductor, corresponding electromagnetic wave signals can be generated by the first antenna structure in different modes.

[0017] In one possible embodiment, the wearable device further includes a third feed source disposed on the first circuit board; the first conductor further includes a third feed point disposed spaced apart from the first feed point; the third feed source is connected to the third feed point and is configured to excite the first antenna structure via the third feed point to generate a third electromagnetic wave signal. Thus, multiple feed sources can be used to excite the first antenna structure to generate corresponding electromagnetic wave signals.

[0018] In a possible implementation, the second feed source is disposed on the first circuit board. Since the first circuit board is convenient for disposing various electronic components, it is relatively simple to dispose the second feed source on the first circuit board.

[0019] In one possible embodiment, an edge portion of the first conductor layer of the first circuit board near the first feed point is electrically connected to the second conductor. Because the second feed source is disposed on the first circuit board, when the second feed source excites the second conductor via the second feed point, a corresponding electric field is generated. This electric field may, in some cases, affect the first feed source's excitation of the first antenna structure via the first feed point to generate the first electromagnetic wave signal. Therefore, electrically connecting the edge portion of the first conductor layer of the first circuit board near the first feed point to the second conductor can reduce this effect.

[0020] In one possible embodiment, since the second feed source is arranged on the first circuit board, the electric field or mode generated when the second feed source excites the second conductor through the second feeding point has a high isolation characteristic from the electric field or mode generated by the first feed source exciting the first antenna structure through the first feeding point to generate the first electromagnetic wave signal.

[0021] In one possible embodiment, the wearable device further includes a fourth feed source, and the second conductor further includes a fourth feed point. The fourth feed point is spaced apart from the second feed point. The fourth feed source is disposed on the first circuit board and connected to the fourth feed point. The fourth feed source excites the second conductor via the fourth feed point to generate a fourth electromagnetic wave signal. Thus, the first circuit board may be provided with the first feed source, the second feed source, and the fourth feed source. The first feed source excites the first antenna structure via the first feed point to generate a first electromagnetic wave signal. The second feed source and the fourth feed source each excite the second conductor to generate a corresponding electromagnetic wave signal.

[0022] In one possible embodiment, the wearable device further includes a second circuit board; the second circuit board is disposed between the first circuit board and the display screen; and the second feed source is disposed on the first circuit board or the second circuit board. Thus, when the wearable device includes the first and second circuit boards, and the first feed source is disposed on the first circuit board, since the second feed source can be disposed on either the first circuit board or the second circuit board, when configured based on the performance required by the wearable device and the layout requirements of the various components, the second feed source disposed on the first circuit board or the second circuit board can be used to excite the second conductor to generate corresponding electromagnetic wave signals.

[0023] In one possible embodiment, the second feed source is provided on the first circuit board, the wearable device further includes a fourth feed source, the second conductor further includes a fourth feeding point, the fourth feed source is provided on the second circuit board and connected to the fourth feeding point, and the fourth feed source excites the second conductor to generate a fourth electromagnetic wave signal through the fourth feeding point. Thus, when the wearable device is configured according to the size of the wearable device, the required frequency band, and the arrangement requirements between the various components, the wearable device can also support the transmission and reception of multiple electromagnetic wave signals in the following manner: the first feed source provided on the first circuit board can excite the first antenna structure to generate a first electromagnetic wave signal, the second feed source provided on the first circuit board can excite the second conductor to generate a second electromagnetic signal, and the fourth feed source provided on the second circuit board can excite the second conductor to generate a fourth electromagnetic wave signal.

[0024] In one possible embodiment, the wearable device further includes a fourth feed source, and the second conductor further includes a fourth feed point. The fourth feed source is connected to the fourth feed point and is used to excite the second conductor to generate a fourth electromagnetic wave signal through the fourth feed point, wherein the second feed source and the fourth feed source are both provided on the second circuit board. Thus, when the wearable device is configured according to the size of the wearable device, the required frequency band, and the arrangement requirements between the various components, the wearable device can also support the transmission and reception of multiple electromagnetic wave signals in the following manner: the first feed source provided on the first circuit board can excite the first antenna structure to generate a first electromagnetic wave signal, the second feed source provided on the second circuit board can excite the second conductor to generate a second electromagnetic signal, and the fourth feed source provided on the second circuit board can excite the second conductor to generate a fourth electromagnetic wave signal.

[0025] In one possible embodiment, the wearable device further includes a third conductor, which is disposed between the first circuit board and the second circuit board and spaced apart from the first and second circuit boards. The periphery of the third conductor is connected to the inner surface of the second conductor or spaced apart from the inner surface of the second conductor by a distance less than or equal to a preset distance. The third conductor is at least used to isolate electromagnetic wave signals generated by excitation of a feed source disposed on the first circuit board from electromagnetic wave signals generated by excitation of a feed source disposed on the second circuit board. This improves the isolation of electromagnetic wave signals generated by the feed source disposed on the first circuit board and the feed source disposed on the second circuit board.

[0026] In one possible embodiment, at least a portion of the third conductor is parallel to the second circuit board, the second circuit board includes a second conductor layer, the third conductor includes a fifth feeding point, and the wearable device further includes a fifth feed source, the fifth feed source is disposed on the second circuit board, and the fifth feed source excites the second antenna structure through the fifth feeding point to generate a fifth electromagnetic wave signal, wherein the second antenna structure is composed of at least the third conductor and the second conductor layer of the second circuit board. Thus, when the wearable device is configured according to the size of the wearable device, the required frequency band, and the arrangement requirements between the various components, the wearable device can also support the transmission and reception of multiple electromagnetic wave signals in the following manner: the fifth feed source disposed on the second circuit board excites the second antenna structure to generate a fifth electromagnetic wave signal, wherein the second antenna structure is composed of at least the third conductor and the second conductor layer of the second circuit board.

[0027] In one possible embodiment, the positions of the first feeding point and the second feeding point projected on the first circuit board are the same or different, the first electromagnetic wave signal and the second electromagnetic wave signal are signals selected from WiFi signals, Bluetooth signals, GPS signals, and cellular signals, and the first electromagnetic wave signal and the second electromagnetic wave signal are the same or different. Thus, the wearable device can support WiFi signals, Bluetooth signals, GPS signals, and cellular signals, and when the positions of the first feeding point and the second feeding point projected on the first circuit board are the same or different, both can be achieved by the first feed source exciting the first antenna structure through the first feeding point and / or by the second feed source exciting the second conductor through the second feeding point.

[0028] In one possible embodiment, the positions of the first feeding point, the second feeding point, and the third feeding point projected on the first circuit board are different, and the positions of the first feeding point, the second feeding point, and the third feeding point projected on the first circuit board are located on different radial lines from the line connecting the center of the first circuit board. The first electromagnetic wave signal, the second electromagnetic wave signal, and the third electromagnetic wave signal are signals among WiFi signals, Bluetooth signals, GPS signals, and cellular signals, and the first electromagnetic wave signal, the second electromagnetic wave signal, and the third electromagnetic wave signal are the same or at least one of them is different.

[0029] In one possible embodiment, the first feeding point, the second feeding point, and the fifth feeding point are projected onto different positions on the first circuit board, and the positions of the first feeding point, the second feeding point, and the fifth feeding point projected onto the first circuit board are located on different radial lines from the line connecting the center of the first circuit board. The first electromagnetic wave signal, the second electromagnetic wave signal, and the fifth electromagnetic wave signal are signals selected from WiFi signals, Bluetooth signals, GPS signals, and cellular signals, and the first electromagnetic wave signal, the second electromagnetic wave signal, and the fifth electromagnetic wave signal are the same or at least one of them is different. Thus, the wearable device can support WiFi signals, Bluetooth signals, GPS signals, and cellular signals. The positions of the first feeding point, the second feeding point, and the fifth feeding point projected onto the first circuit board are located on different radial lines from the line connecting the center of the first circuit board. Compared to the case where the positions of at least two of the first feeding point, the second feeding point, and the fifth feeding point projected onto the first circuit board and the line connecting the center of the first circuit board are located on the same radial line, the mutual influence between the first electromagnetic wave signal, the second electromagnetic wave signal, and the fifth electromagnetic wave signal can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the implementation. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0031] FIG1 is a schematic diagram of the three-dimensional structure of a wearable device provided in some embodiments of the present application;

[0032] FIG2 is a schematic structural diagram of a first possible wearable device provided in an embodiment of the present application;

[0033] FIG3 is a schematic structural diagram of a second possible wearable device provided in an embodiment of the present application;

[0034] FIG4 is a schematic structural diagram of a third possible wearable device provided in an embodiment of the present application;

[0035] FIG5 is a schematic structural diagram of a possible frame provided by an embodiment of the present application;

[0036] FIG6 is a cross-sectional view showing electrical connection between a first conductor and a first conductor layer on a first circuit board according to an embodiment of the present application;

[0037] FIG7 is a cross-sectional view of a wearable device provided by an embodiment of the present application taken from 9 o'clock to 3 o'clock;

[0038] FIG8 is a cross-sectional view of a partial electrical connection between a first conductor and a second conductor provided by an embodiment of the present application;

[0039] FIG9 is a schematic structural diagram of a fourth possible wearable device provided in an embodiment of the present application;

[0040] FIG10 is a schematic structural diagram of a fifth possible wearable device provided in an embodiment of the present application;

[0041] FIG11 is a schematic structural diagram of a fifth possible wearable device provided in an embodiment of the present application;

[0042] FIG12 is a schematic structural diagram of a sixth possible wearable device provided in an embodiment of the present application;

[0043] FIG13 is a schematic structural diagram of a seventh possible wearable device provided in an embodiment of the present application;

[0044] FIG14 is a schematic structural diagram of an eighth possible wearable device provided in an embodiment of the present application;

[0045] FIG15 is a schematic structural diagram of a ninth possible wearable device provided in an embodiment of the present application;

[0046] FIG16 is a schematic structural diagram of a tenth possible wearable device provided in an embodiment of the present application;

[0047] FIG17 is a schematic structural diagram of an eleventh possible wearable device provided in an embodiment of the present application;

[0048] FIG18 is a schematic structural diagram of a twelfth possible wearable device provided in an embodiment of the present application;

[0049] FIG19 is a schematic structural diagram of a thirteenth possible wearable device provided in an embodiment of the present application;

[0050] FIG20 is a schematic structural diagram of a fourteenth possible wearable device provided in an embodiment of the present application;

[0051] FIG21 is a schematic diagram of the three-dimensional structure of FIG4 from a top view according to an embodiment of the present application;

[0052] FIG22 is a schematic diagram of the three-dimensional structure of FIG8 from a top view according to an embodiment of the present application;

[0053] FIG23 is a schematic diagram of the three-dimensional structure of FIG19 from a top view according to an embodiment of the present application;

[0054] FIG24 is a simulation diagram of a first antenna structure provided in an embodiment of the present application; a return loss curve S1, a system radiation efficiency curve Sr1, and a system total efficiency curve St1 when transmitting and receiving electromagnetic wave signals under the excitation of the first feed source;

[0055] FIG25 is a cross-sectional schematic diagram of the electric field distribution when the first feed source excites the first antenna structure operating at the first resonant frequency of 2.05 GHz according to an embodiment of the present application;

[0056] FIG26 is an antenna radiation pattern when the first feed source excites the first antenna structure operating at the first resonant frequency of 2.06 GHz according to an embodiment of the present application;

[0057] FIG27 is a current distribution diagram of the first antenna structure when the first feed source excites the first antenna structure to operate at a first resonant frequency of 2.05 GHz according to an embodiment of the present application;

[0058] FIG28 is a cross-sectional schematic diagram of the electric field distribution when the first feed source excites the first antenna structure to operate at the second resonant frequency of 2.5 GHz according to an embodiment of the present application;

[0059] FIG29 is an antenna radiation pattern when the first feed source excites the first antenna structure to operate at the second resonant frequency of 2.5 GHz according to an embodiment of the present application;

[0060] FIG30 is a current distribution diagram of the first antenna structure excited by the first feed source V1 according to an embodiment of the present application when operating at the second resonant frequency of 2.5 GHz;

[0061] FIG31 is a simulation diagram of a return loss curve S2 of a second feed, a system radiation efficiency curve Sr2, and a system total efficiency curve St2 provided in one embodiment of the present application;

[0062] FIG32 is a schematic diagram of a first return loss curve and an isolation curve of a wearable device provided in one embodiment of the present application;

[0063] FIG33 is a simulation diagram of a system radiation efficiency curve Sr1 of a first feed source and a system radiation efficiency curve Sr2 of a second feed source when a simulated wearable device is worn on an arm, provided by an embodiment of the present application;

[0064] FIG34 is a schematic diagram of a matching circuit provided in an embodiment of the present application;

[0065] FIG35 is a simulation diagram of a return loss curve S3, a system radiation efficiency curve Sr3, and a system total efficiency curve St3 of a signal generated by a first feed source exciting a first antenna structure through a first matching circuit, provided in one embodiment of the present application;

[0066] FIG36 is an antenna radiation pattern of a GPS signal generated by a first feed source V1 through a first matching circuit to excite a first antenna structure provided by an embodiment of the present application;

[0067] FIG37 is a simulation diagram of a return loss curve S4, a system radiation efficiency curve Sr4, and a system total efficiency curve St4 of a signal generated by a third feed source exciting the first antenna structure through a third matching circuit, provided in one embodiment of the present application;

[0068] FIG38 is an antenna radiation pattern of a signal generated by a third feed source V3 exciting the first antenna structure through a third matching circuit according to an embodiment of the present application;

[0069] FIG39 is a simulation diagram of return loss curves S5 and S6 and efficiency curves Sr5 and Sr6 of a signal generated by a second feed source exciting a second conductor through a second matching circuit according to an embodiment of the present application;

[0070] FIG40 is a simulation diagram of return loss curves S7 and S8 and efficiency curves Sr7 and Sr8 of a signal generated by a second feed source through a second matching circuit to excite a second conductor, according to an embodiment of the present application;

[0071] FIG41 is a simulation diagram of a return loss curve S9 and an efficiency curve Sr9 of a signal generated by a second feed source exciting a second conductor through a second matching circuit according to an embodiment of the present application;

[0072] FIG42 is a schematic diagram of a second return loss curve and an isolation curve of a wearable device provided in one embodiment of the present application;

[0073] FIG43 is a schematic diagram of a third return loss curve and an isolation curve of a wearable device provided in one embodiment of the present application;

[0074] FIG44 is a simulation diagram of a return loss curve when the second feed source according to an embodiment of the present application switches to generate cellular signals in the B1, B3, B5, and B8 frequency bands through the second matching circuit, and the third feed source V3 excites the first antenna structure through the third matching circuit to generate GPS signals;

[0075] Figure 45 is a simulation diagram of the return loss curve of the first feed source exciting the first antenna structure through the first matching circuit to generate Bluetooth signals when the second feed source provided in an embodiment of the present application switches to generate cellular signals in the B1, B3, B5 and B8 frequency bands through the second matching circuit.

[0076] Figure numbers: wearable device 100, functional part 101, wearing part 102; display screen 10, bottom shell 20, first circuit board 30, first feed source V1, first conductor 21, first feeding point F1, first conductor layer 31, first antenna structure A1, bottom shell body 22, second feed source V2, frame 40, second conductor 41, second feeding point F2, gap D, fourth feed source V4, fourth feeding point F4, second circuit board 50, third conductor 60, second conductor layer 51, fifth feed source V5, fifth feeding point F5, second antenna structure A2, battery E. DETAILED DESCRIPTION

[0077] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.

[0078] Please refer to Figure 1, which is a schematic diagram of the three-dimensional structure of a wearable device provided in some embodiments of the present application. Among them, the wearable device 100 can be, but is not limited to, a smart watch, a smart bracelet, a smart ring, and a smart necklace.

[0079] In some embodiments, as shown in Figure 1, the wearable device 100 includes a functional part 101 and a wearing part 102, the wearing part 102 is connected to the functional part 101, the wearing part 102 can be but not limited to a watch strap, a belt, a leg band, a headband or a chain, etc., the functional part 101 can be but not limited to a watch body, a bracelet body, a functional component embedded in a ring, or a necklace pendant-shaped functional component, etc., the functional part 101 has at least a communication function, and can further have any one or more functions such as time display, weather display, video recording, audio and video playback, motion monitoring, health monitoring and navigation functions.

[0080] As shown in Figure 2, in some embodiments, the wearable device 100 includes a display screen 10, a bottom shell 20, a first circuit board 30 and a first feed source V1; the bottom shell 20 includes a first conductor 21, and the first conductor 21 includes a first feeding point F1; the first circuit board 30 is located between the first conductor 21 and the display screen 10, and the first circuit board 30 includes a first conductor layer 31; the first feed source V1 is arranged on the first circuit board 30, and the first feed source V1 is electrically connected to the first feeding point F1; the first conductor 21 and the first circuit board 30 are spaced apart; the first feed source V1 is used to excite the first antenna structure A1 through the first feeding point F1 to generate a first electromagnetic wave signal, wherein the first antenna structure A1 is composed of at least the first conductor 21 and the first conductor layer 31 of the first circuit board 30.

[0081] Since the bottom shell 20 includes the first conductor 21, and the electromagnetic wave signal is not generated by stimulating the metal layer on the display screen, it is not necessary to radiate the electromagnetic wave signal through the gap beside the display screen. Instead, the gap for radiating the first electromagnetic wave signal can be set between the display screen 10 and the bottom shell 20. Therefore, when the screen-to-body ratio becomes higher and higher, the size of the gap for radiating the first electromagnetic wave signal is not affected, thereby reducing the attenuation of the first electromagnetic wave signal and increasing the radiation efficiency of the first electromagnetic wave signal.

[0082] Because the human body is a dielectric, when the wearable device 100 is close to the human body, the human body will absorb the electromagnetic energy of the wearable device 100, causing the antenna performance of the wearable device 100 to deteriorate. According to electromagnetic field boundary condition theory, because the human body is a dielectric with a high dielectric constant, the tangential component of the electric field relative to the human body surface is more likely to enter the human body and be absorbed, while the normal component of the electric field relative to the human body surface is less likely to enter the human body and thus less likely to be absorbed. Therefore, designing an antenna with an electric field distribution normal to the human body surface can minimize the impact of human body absorption and may even enhance antenna performance, thereby effectively solving the problem of antenna performance deterioration caused by human body absorption when the wearable device 100 is worn on the human body. In some embodiments, at least a portion of the first conductor 21 is parallel to the first circuit board 30. The term "at least a portion of the first conductor 21 is parallel to the first circuit board 30" means that at least a portion of the surface with the largest area of ​​the first conductor 21 is parallel to the surface with the largest area of ​​the first circuit board 30.

[0083] Among them, parallel can be understood as basically parallel, allowing for situations where the parts are not absolutely parallel due to factors such as assembly tolerance, design tolerance, and the influence of structural flatness. Errors within a small angle range are also allowed. For example, within an assembly error range of 10 degrees, it can be understood as a parallel relationship.

[0084] In some embodiments, the first conductor layer 31 included in the first circuit board 30 is a layer structure in the first circuit board 30 and is parallel to the largest surface of the first circuit board 30. Therefore, at least a portion of the first conductor 21 is parallel to the first circuit board 30, that is, at least a portion of the first conductor 21 is parallel to the first conductor layer 31 included in the first circuit board 30.

[0085] When the wearable device 100 is worn, the bottom housing 20 is in close contact with human skin. The bottom housing 20 includes a first conductor 21. The first antenna structure A1 is composed of at least the first conductor 21 and the first conductor layer 31 of the first circuit board 30. The first feed source V1 is used to excite the first antenna structure A1 to generate a first electromagnetic wave signal through the first feeding point F1. At least a portion of the first conductor 21 is parallel to the first circuit board 30. Therefore, when the first feed source V1 excites the first antenna structure A1 to generate the first electromagnetic wave signal through the first feeding point F1, it excites the first antenna structure A1 to generate an electric field perpendicular to at least a portion of the first conductor 21 and the first circuit board 30. Since the first conductor 21 is disposed on the bottom housing 20, the first conductor 21 is also substantially parallel to the bottom housing 20. Therefore, when the wearable device 100 is worn, the electric field generated by the first antenna structure A1 is a normal electric field relative to the human body, that is, perpendicular to the skin surface of the part of the human body where the wearable device 100 is worn. Since the human body does not easily absorb normal electric fields, that is, electric fields perpendicular to the human body surface, compared to generating a tangential electric field, the attenuation of the first electromagnetic wave signal can be reduced, and its coverage range can be increased. As the screen-to-body ratio increases, the antenna performance of the wearable device when worn by the human body is improved by reducing the deterioration of the antenna performance caused by human wear.

[0086] That is, in the present application, the first antenna structure A1 is composed of at least the first conductor 21 included in the bottom shell 20 and the first conductor layer 31 of the first circuit board 30. Since the generated electric field is mainly perpendicular to the electric field of the first conductor 21 and the first circuit board 30, it can avoid being absorbed by the human body when the wearable device 100 is worn, and can effectively avoid being affected by the human body, thereby ensuring the antenna radiation performance.

[0087] In some embodiments, the wearable device 100 further includes a battery E, which can be disposed between the first circuit board 30 and the display screen 10. In other embodiments, the battery E can also be disposed between the bottom housing 20 and the first circuit board 30.

[0088] In some embodiments, the first antenna structure A1 is a cavity antenna structure or a patch antenna structure.

[0089] Since both the cavity antenna structure and the patch antenna structure can concentrate the first electromagnetic wave signal, the radiation directionality can be optimized and the radiation efficiency can be enhanced.

[0090] The display screen 10 may be, but is not limited to, a liquid crystal display (LCD), an organic light-emitting diode display (OLED), a dot matrix display, a flexible display, or a curved display. When the display screen 10 is an LCD or OLED display, the display screen 10 may be a touch screen or a non-touch screen. When the display screen 10 is a touch screen, the display screen 10 may be a capacitive touch screen, a resistive touch screen, an acoustic touch screen, a force-based touch screen, or a light-based touch screen.

[0091] The material of the first conductor 21 may be, but is not limited to, conductive metal, conductive alloy, or conductive polymer material.

[0092] In some embodiments, the resonant frequency of the first antenna structure A1 is determined based on at least the length of the long side and / or the length of the short side of the first conductor 21. Thus, the resonant frequency of the first antenna structure A1 can be adjusted to a target resonant frequency by adjusting the length of the long side and / or the length of the short side of the first conductor 21.

[0093] The shape of the projection of the first conductor 21 on the first circuit board 30 may be, but is not limited to, a circle, an ellipse, a rectangle, a square, a rhombus, or an irregular shape. When the shape of the projection of the first conductor 21 on the first circuit board 30 is a circle, the projections of the long side and the short side of the first conductor 21 on the first circuit board 30 can be understood as the diameter of the circle; when the shape of the projection of the first conductor 21 on the first circuit board 30 is an ellipse, the projections of the long side and the short side of the first conductor 21 on the first circuit board 30 can be understood as the long radius and the short radius of the ellipse; when the shape of the projection of the first conductor 21 on the first circuit board 30 is a rectangle, the projections of the long side and the short side of the first conductor 21 on the first circuit board 30 can be understood as the long side and the short side of the rectangle; when the shape of the projection of the first conductor 21 on the first circuit board 30 is a rhombus, the projections of the long side and the short side of the first conductor 21 on the first circuit board 30 can be understood as the two diagonals of the rhombus.

[0094] In some embodiments, as shown in FIG2 , the bottom shell 20 further includes a bottom shell body 22; the first conductor 21 is a metal sheet disposed on the bottom shell body 22; or, the first conductor 21 is a metal layer formed on the inner and / or outer surface of the bottom shell body 22 through a manufacturing process. Because the first conductor 21 contributes to the formation of the first antenna structure A1, the shape and structure of the first conductor 21 are subject to specific requirements to improve radiation performance. Since the bottom shell 20 includes the bottom shell body 22, the structure of the bottom shell body 22 allows for more diverse designs, thereby better adapting to the design requirements of the wearable device 100.

[0095] Among them, the inner surface of the bottom shell body 22 refers to the surface of the bottom shell body 22 facing the interior of the wearable device 100, for example, the surface facing the side of the first circuit board 30. Correspondingly, the outer surface of the bottom shell body 22 refers to the surface of the bottom shell body 22 facing away from the interior of the wearable device 100, that is, the surface facing away from the side of the first circuit board 30.

[0096] The bottom shell body 22 is made of insulating material, which may be, but is not limited to, any one or a combination of plastic, fiber composite material, glass, or ceramic.

[0097] Here, "and / or" simply describes the same fields in the associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0098] Among them, when the first conductor 21 is a metal sheet arranged on the bottom shell body 22, specifically, the first conductor 21 can be embedded in the bottom shell body 22. For example, during the preparation process, the bottom shell body 22 is reserved with an installation gap, and the first conductor 21 can be installed in the installation gap. When the first conductor 21 matches the size of the installation gap, the first conductor 21 can be better prevented from moving relative to the bottom shell body 22; or, during the preparation process, the material of the bottom shell body 22 is fluid and wraps the metal sheet, and then solidifies and forms the bottom shell 20 embedded with the metal sheet. Alternatively, the first conductor 21 is a metal sheet arranged on the inner surface and / or outer surface of the bottom shell body 22, that is, the first conductor 21 and the bottom shell body 22 can be a split structure. Furthermore, the first conductor 21 is connected to the inner surface and / or outer surface of the bottom shell body 22, and the connection method can be bonding or other connection methods. However, since the first conductor 21 serves as an antenna radiator, the connection method of bonding has less effect on its current distribution than other connection methods such as screwing. It should be noted that the first conductor 21 and the inner surface and outer surface of the bottom shell body 22 can also be connected without a connector, but are in abutment under the action of the device inside the wearable device 100. Regardless of the method, it is not easy for the first conductor 21 and the bottom shell body 22 to be displaced from each other.

[0099] The first conductor 21 is a metal layer formed on the inner and / or outer surfaces of the bottom shell body 22 via PDS (Printing-Direct-Structuring) or LDS (Laser-Direct-Structuring). This means the first conductor 21 and the bottom shell body 22 are integrally formed, completely preventing displacement between the first conductor 21 and the bottom shell body 22 and facilitating installation. The first conductor 21 is formed on the inner and / or outer surfaces of the bottom shell body 22 via LDS. This can be achieved by laser-activating the bottom shell body 22 (which is injection-molded using special plastic particles) and then coating the first conductor 21 on the inner and / or outer surfaces. The first conductor 21 is formed on the inner and / or outer surfaces of the bottom shell body 22 via PDS. This can be achieved by printing the first conductor 21 on the inner and / or outer surfaces of the bottom shell body 22 and then thermally curing the first conductor 21. In other embodiments, the first conductor 21 may be formed on the inner surface and / or outer surface of the bottom shell body 22 by other processes, which is not limited here.

[0100] In other embodiments, the bottom shell 20 may also be made entirely of conductive materials, that is, the bottom shell 20 is the first conductor 21 . In this case, the bottom shell 20 may only include the first conductor 21 but not the bottom shell body 22 .

[0101] In some embodiments, a metal post (not shown) may be provided on the side of the first conductor 21 close to the first circuit board 30 at a position corresponding to the first feeding point F1. A metal spring (not shown) may be provided on the side of the first circuit board 30 facing the first conductor 21. The metal spring is electrically connected to the first feed source V1, and the metal post is electrically connected to the metal spring, thereby electrically connecting the first feed source V1 to the first feeding point F1 on the first conductor 21. In other embodiments, the first feed source V1 and the first feeding point F1 may be electrically connected in other ways, not limited to this example.

[0102] In some other embodiments, when the first conductor 21 is formed on the inner surface of the bottom shell body 22, the metal column may not be provided on the first conductor 21, but only a metal spring is provided on the side of the first circuit board 30 facing the first conductor 21, and the first feed source V1 is electrically connected to the first feeding point F1 through the metal spring.

[0103] Referring to FIG. 2 and FIG. 3 , in some embodiments, as shown in FIG. 2 , the first feeding point F1 is disposed at an edge region of the first conductor 21, or, as shown in FIG. 3 , the first feeding point F1 is disposed at a middle region of the first conductor 21. Because the first feeding point F1 is disposed in different modes when disposed at an edge region of the first conductor 21 than when disposed in the middle region, corresponding electromagnetic wave signals can be generated by the first antenna structure A1 in different modes.

[0104] The middle region refers to the region including the center of the first conductor 21, for example, the region corresponding to the overall shape of the wearable device 100 being reduced by 1 / 2 with the center of the first conductor 21 as the center. The edge region refers to the region of the first conductor 21 that is not the middle region, or may refer to a portion of the region that is not the middle region. For example, the edge region may only be the region near the periphery of the first conductor 21. It should be noted that the division between the middle region and the edge region may also be performed in other ways and is not limited to this example.

[0105] In some embodiments, as shown in Figure 4, the wearable device 100 also includes a second feed source V2 and a frame 40, the frame 40 includes a second conductor 41; the second conductor 41 includes a second feeding point F2, the frame 40 is arranged between the display screen 10 and the bottom shell 20, and there is a gap D between the second conductor 41 and the first conductor 21; the second feed source V2 is electrically connected to the second feeding point F2, and the second feed source V2 is used to excite the second conductor 41 to generate a second electromagnetic wave signal through the second feeding point F2.

[0106] Thus, the frame 40 structure of the wearable device 100 can be fully utilized. The frame 40 not only provides support, but the second feed source V2 can also excite the second conductor 41 on the frame 40 to generate a second electromagnetic wave signal, thus achieving multiple functions. Moreover, because the antenna structures and positions for stimulating the first electromagnetic wave signal and the second electromagnetic wave signal are different, the performance requirements of the wearable device can be met while adapting to the dimensions of the bottom housing 20 and the frame 40 of the wearable device 100.

[0107] In some embodiments, the frame 40 is disposed between the display screen 10 and the bottom shell 20 , and cooperates with the display screen 10 and the bottom shell 20 to form a housing of the wearable device 100 .

[0108] The frame 40 can be made entirely of a conductive material, and the frame 40 is a whole frame, and the frame 40 as a whole is the second conductor 41. In some embodiments, the frame 40 is made of a conductive material, and the frame 40 is further divided into a plurality of frame segments by gaps, and the second conductor 41 can be one or part of the frame segments.

[0109] As shown in FIG5 , the frame 40 may also include a second conductor 41 and a frame body 42. The second conductor 41 may be a metal sheet disposed on the frame body 42, or the second conductor 41 may be a metal layer formed on the inner surface and / or outer surface of the frame body 42 through a manufacturing process. The manner in which the second conductor 41 is disposed on the frame body 42 may be similar to the manner in which the first conductor 21 is disposed on the bottom shell body 22, and will not be further described here.

[0110] Among them, when the bottom shell 20 also includes the bottom shell body 22, regardless of whether the frame 40 is made of a conductive material or an insulating material, the first conductor 21 can be set in the middle position of the bottom shell body 22, so that the peripheral area of ​​the bottom shell body 22 is tightly connected to the frame 40, so as to ensure the sealing of the shell of the wearable device 100, and ensure that the first conductor 21 and the second conductor 41 are mutually insulated, that is, there is a gap D. When the bottom shell 20 is made entirely of a conductive material, regardless of whether the frame 40 is made of a conductive material or an insulating material, the bottom shell 20 and the end of the frame 40 close to the bottom shell 20 can be sealed and connected by an insulating member, so as to ensure the sealing of the shell of the wearable device 100, and ensure that the first conductor 21 and the second conductor 41 are mutually insulated, that is, there is a gap D.

[0111] In some embodiments, the gap D between the second conductor 41 and the first conductor 21 allows at least the first electromagnetic wave signal to be radiated from the wearable device 100. As the screen-to-body ratio increases, there is no need to reduce the size of the gap D between the second conductor 41 and the first conductor 21. Therefore, the size of the gap D between the second conductor 41 and the first conductor 21 can be reasonably set to avoid attenuation of the first electromagnetic wave signal due to a reduction in the size of the gap D, thereby preventing a reduction in the coverage range of the first electromagnetic wave signal.

[0112] In some embodiments, as shown in FIG6 , the first conductor 21 is partially electrically connected to the first conductor layer 31 of the first circuit board 30. FIG7 is a diagram before connection, which is placed here for comparison and easy viewing. Because when the wearable device 100 is worn, the bottom shell 20 is close to the human skin, the bottom shell 20 includes a first conductor 21, and there is a gap D between the second conductor 41 and the first conductor 21. The gap D between the second conductor 41 and the first conductor 21 is at least for the first electromagnetic wave signal to be radiated from the wearable device 100. However, in some scenarios, for example, when the wearable device 100 is worn tightly on the human body, it will be squeezed with the human body, causing the wearable device 100 to be partially sunken in the skin, thereby causing the gap D between the second conductor 41 and the first conductor 21 to correspond to the sunken portion in the skin. Partially blocked (for example, in a smartwatch, due to the strap, the areas around 12 o'clock and 6 o'clock of gap D are usually not blocked, while the areas around 9 o'clock and 3 o'clock of gap D are usually blocked due to their proximity to the human body). Since the human body is a dielectric, it affects the electric field generated by the first antenna structure A1 by shielding or blocking gap D. The first conductor 21 is partially electrically connected to the first conductor layer 31 of the first circuit board 30 (direct short-circuit connection or connection via a low-impedance lumped or distributed device), thereby eliminating or reducing the impact of the human body blocking the gap on the electric field generated by the first antenna structure. Therefore, when the wearable device is partially recessed in the skin, it can still ensure good radiation performance.

[0113] Furthermore, when the human body shields or blocks the gap D, the human body will absorb energy and convert part of the electromagnetic wave energy into heat energy, thereby causing the loss of electromagnetic wave energy. The human body is a dielectric. When shielding or blocking the gap D, the human body is equivalent to impedance, which will affect the resonant frequency of the first antenna structure A1. Therefore, locally electrically connecting the first conductor 21 with the first conductor layer 31 of the first circuit board 30 can eliminate or weaken the loss of the resonant frequency of the first antenna structure A1 and the electromagnetic wave signal energy caused by the human body impedance.

[0114] The first conductor 21 and the first conductor layer 31 of the first circuit board 30 can be directly short-circuited or connected via a low-impedance lumped or distributed device. This effectively short-circuits the first conductor 21 and the first conductor layer 31 of the first circuit board 30, thereby eliminating or reducing the electric field effect when the wearable device 100 is partially sunken into the skin.

[0115] The partial electrical connection between the first conductor 21 and the first conductor layer 31 of the first circuit board 30 refers to a partial electrical connection between a portion of the first conductor 21 and a portion of the first conductor layer 31. In some embodiments, the partial area of ​​the first conductor 21 and the partial area of ​​the first conductor layer 31 may refer to areas that may be blocked when the wearable device 100 is worn on a human body. For example, when the wearable device 100 is a smartwatch, the partial area of ​​the first conductor 21 and the partial area of ​​the first conductor layer 31 may include the first conductor 21 and the areas of the first conductor layer 31 located at the 3 o'clock and 9 o'clock positions.

[0116] In some embodiments, as shown in FIG8 , the first conductor 21 is partially electrically connected to the second conductor 41. The first conductor 21 and the second conductor 41 may be directly short-circuited or connected via a low-impedance lumped or distributed device.

[0117] Similarly, locally electrically connecting the first conductor 21 with the second conductor 41 can also eliminate or weaken the impact of the human body blocking the gap D on the electric field of the first antenna structure A1. Specifically, you can refer to the previous explanation of the local electrical connection between the first conductor 21 and the first conductor layer 31 of the first circuit board 30 for analogy and understanding.

[0118] The partial electrical connection between the first conductor 21 and the second conductor 41 refers to a partial electrical connection between a portion of the first conductor 21 and a portion of the second conductor 41. In some embodiments, the partial area of ​​the first conductor 21 and the partial area of ​​the second conductor 41 may refer to portions of the first conductor 21 and the partial area of ​​the second conductor 41 that may be partially sunken into the skin when the wearable device 100 is worn on a human body. For example, when the wearable device 100 is a smartwatch, the partial area of ​​the first conductor 21 and the partial area of ​​the second conductor 41 may include the areas of the first conductor 21 and the second conductor 41 located at the 3 o'clock and 9 o'clock positions.

[0119] In some embodiments, as shown in FIG9 , the wearable device 100 further includes a third feed source V3 disposed on the first circuit board 30. The first conductor 21 further includes a third feed point F3 spaced apart from the first feed point F1. The third feed source V3 is connected to the third feed point F3 and is configured to excite the first antenna structure A1 via the third feed point F3 to generate a third electromagnetic wave signal. Thus, multiple feed sources can be used to excite the first antenna structure A3 to generate corresponding electromagnetic wave signals.

[0120] In which, the wearable device 100 may also include several feed sources (3 or more), which are all arranged on the first circuit board 30, and the first conductor 21 includes several feeding points corresponding to the several feed sources. The several feed sources can excite the first antenna structure A1 to generate several electromagnetic wave signals through the corresponding several feeding points, wherein the several feeding points are arranged at intervals.

[0121] In some embodiments, as shown in Figure 4, the second feed source V2 is disposed on the first circuit board 30. Since the first circuit board 30 is convenient for disposing various electronic components, it is relatively simple to dispose the second feed source V2 on the first circuit board 30.

[0122] In some embodiments, as shown in FIG10 , an edge portion of the first conductor layer 31 of the first circuit board 30 near the first feeding point F1 is electrically connected to the second conductor 41. Since the second feed source V2 is disposed on the first circuit board 30, a corresponding electric field is generated on the first circuit board 30 when the second feed source V2 excites the second conductor 41 through the second feeding point F2. This electric field affects the first feed source V1 exciting the first antenna structure A1 through the first feeding point F1 to generate the first electromagnetic wave signal. Therefore, the edge portion of the first conductor layer 31 of the first circuit board 30 near the first feeding point F1 is electrically connected to the second conductor 41 to reduce this effect.

[0123] The edge portion of the first conductor layer 31 near the first feeding point F1 and the second conductor 41 can be directly short-circuited or connected via a low-impedance lumped or distributed device. In other embodiments, the edge portion of the first feeding point F1 and the second conductor 41 can also be electrically connected via other means, which are not limited here.

[0124] Furthermore, the positions of the first feeding point F1 and the second feeding point F2 projected on the plane where the first circuit board 30 is located do not coincide with the line connecting the center of the first circuit board 30, that is, there is an angle between the two lines, and the angle is greater than 0° and less than 360°, for example, 90° to 270°, so that when the edge portion of the first conductor layer 31 close to the first feeding point F1 is electrically connected to the second conductor 41, it will be staggered with the feeding path of the second feed source V2, thereby reducing the short-circuit effect on the second feed source V2 exciting the second conductor 41 to generate a second electromagnetic wave signal through the second feeding point F2.

[0125] In some embodiments, as shown in FIG11 , the wearable device 100 further includes a fourth feed source V4, and the second conductor 41 further includes a fourth feed point F4. The fourth feed point F4 is spaced apart from the second feed point F2. The fourth feed source V4 is disposed on the first circuit board 30 and connected to the fourth feed point F4. The fourth feed source V4 excites the second conductor 41 through the fourth feed point F4 to generate a fourth electromagnetic wave signal. Thus, the first circuit board 30 may be provided with the first feed source V1, the second feed source V2, and the fourth feed source V4. The first feed source V1 excites the first antenna structure A1 through the first feed point F1 to generate a first electromagnetic wave signal. The second feed source V2 and the fourth feed source V4 both excite the second conductor 41 to generate corresponding electromagnetic wave signals.

[0126] In which, the wearable device 100 may also include several feed sources (3 or more), which are all arranged on the first circuit board 30, and the second conductor 41 includes several feeding points corresponding to the several feed sources. The several feed sources can excite the second conductor 41 to generate several electromagnetic wave signals through the corresponding several feeding points, wherein the several feeding points are arranged at intervals.

[0127] In some embodiments, as shown in Figures 12 and 13, the wearable device 100 further includes a second circuit board 50; the second circuit board 50 is disposed between the first circuit board 30 and the display screen 10; and the second feed source V2 is disposed on the first circuit board 30 (as shown in Figure 12) or the second circuit board 50 (as shown in Figure 13). Thus, when the wearable device 100 includes the first circuit board 30 and the second circuit board 50, and the first feed source V1 is disposed on the first circuit board 30, since the second feed source V2 can be disposed on the first circuit board 30 or the second circuit board 50, when the wearable device 100 is configured according to the frequency band required and the arrangement requirements between the various components, the second feed source V2 disposed on the first circuit board 30 or the second circuit board 50 can be used to excite the second conductor 41 to generate corresponding electromagnetic wave signals.

[0128] In some embodiments, as shown in FIG14 , the second feed source V2 is disposed on the first circuit board 30, the wearable device 100 further includes a fourth feed source V4, the second conductor 41 further includes a fourth feeding point F4, the fourth feed source V4 is disposed on the second circuit board 50 and connected to the fourth feeding point F4, and the fourth feed source V4 excites the second conductor 41 to generate a fourth electromagnetic wave signal through the fourth feeding point F4. Thus, when configured according to the size of the wearable device 100, the required frequency band, and the arrangement requirements between the various components, the wearable device 100 can support the transmission and reception of multiple electromagnetic wave signals in the following manner: the first feed source V1 disposed on the first circuit board 30 can excite the first antenna structure A1 to generate a first electromagnetic wave signal, the second feed source V2 disposed on the first circuit board 30 can excite the second conductor 41 to generate a second electromagnetic signal, and the fourth feed source V4 disposed on the second circuit board 50 can excite the second conductor 41 to generate a fourth electromagnetic wave signal.

[0129] In some embodiments, as shown in FIG15 , the wearable device 100 also includes a fourth feed source V4, and the second conductor further includes a fourth feed point F4. The fourth feed source V4 is connected to the fourth feed point F4 and is used to excite the second conductor 41 to generate a fourth electromagnetic wave signal through the fourth feed point F4. The difference from the structure shown in FIG14 is that both the second feed source V2 and the fourth feed source V4 are disposed on the second circuit board 50. Thus, when configured according to the size of the wearable device 100, the required frequency band, and the arrangement requirements between various components, the wearable device 100 can also support the transmission and reception of multiple electromagnetic wave signals in the following manner: the first feed source V1 disposed on the first circuit board 30 can excite the first antenna structure A1 to generate a first electromagnetic wave signal, the second feed source V2 disposed on the second circuit board 50 can excite the second conductor 41 to generate a second electromagnetic signal, and the fourth feed source V4 disposed on the second circuit board 50 can excite the second conductor 41 to generate a fourth electromagnetic wave signal.

[0130] The wearable device 100 may further include a plurality of other feed sources (3 or more), all of which are disposed on the second circuit board 50. The second conductor 41 includes a plurality of other feed points electrically connected to the plurality of other feed sources. The plurality of other feed sources may excite the second conductor 41 through the corresponding plurality of feed points to generate a plurality of other electromagnetic wave signals, wherein the plurality of other feed points are spaced apart. The other feed sources may be the same as or different from the fourth feed source V4, and the other electromagnetic wave signal may be the fourth electromagnetic wave signal or an electromagnetic wave signal different from the fourth electromagnetic wave signal.

[0131] In some embodiments, as shown in FIG16 , the wearable device 100 further includes a third conductor 60, which is disposed between the first circuit board 30 and the second circuit board 50 and spaced apart from both the first circuit board 30 and the second circuit board 50. The periphery of the third conductor 60 is connected to the inner surface of the second conductor 41 or spaced apart from the inner surface of the second conductor 41 by a distance less than or equal to a preset distance. The third conductor 60 is at least used to isolate electromagnetic wave signals generated by excitation of a feed source disposed on the first circuit board 30 from electromagnetic wave signals generated by excitation of a feed source disposed on the second circuit board 50. Thus, the isolation of electromagnetic wave signals generated by the feed source on the first circuit board 30 and the feed source on the second circuit board 50 can be improved.

[0132] The periphery of the third conductor 60 is connected to the inner surface of the second conductor 41 , and the connection method may be, but is not limited to, welding, bonding with conductive glue, and the like.

[0133] Among them, the preset distance can be a smaller value, such as a value less than 10 mm. When the periphery of the third conductor 60 is spaced from the inner surface of the second conductor 41 and the distance is less than or equal to the preset distance, it can also play a better mutual isolation effect on the electromagnetic wave signal generated by the feed source excitation set on the first circuit board 30 and the electromagnetic wave signal generated by the feed source excitation set on the second circuit board 50.

[0134] In some embodiments, the battery E is disposed between the first circuit board 30 and the display screen 10, specifically, between the first circuit board 30 and the third conductor 60. In other embodiments, the battery E is disposed between the first circuit board 30 and the display screen 10, or between the third conductor 60 and the second circuit board 50, or between the second circuit board 50 and the display screen 10, etc., or other arrangements are also possible, which are not limited here.

[0135] In some embodiments, as shown in FIG17 , at least a portion of the third conductor 60 is parallel to the second circuit board 50 . The second circuit board 50 includes a second conductor layer 51 . The third conductor 60 includes a fifth feed point F5 . The wearable device 100 further includes a fifth feed source V5 , which is disposed on the second circuit board 50 . The fifth feed source V5 excites the second antenna structure A2 via the fifth feed point F5 to generate a fifth electromagnetic wave signal. The second antenna structure A2 is composed of at least the third conductor 60 and the second conductor layer 51 of the second circuit board 50 . Therefore, when configuring the wearable device 100 based on its size, required frequency band, and required arrangement of various components, a solution can be provided for selection: the fifth feed source V5 disposed on the second circuit board 50 excites the second antenna structure A2 to generate a fifth electromagnetic wave signal. The second antenna structure A2 is composed of at least the third conductor 60 and the second conductor layer 51 of the second circuit board 50 .

[0136] The third conductor 60 and the second circuit board 50 are also substantially parallel to the bottom shell 20 (ie, they may not be completely parallel, but may be tilted to a certain extent, such as within 10 degrees).

[0137] In some embodiments, at least a portion of the third conductor 60 is parallel to the second circuit board 50 , which means that at least a portion of the largest surface of the third conductor 60 is parallel to the largest surface of the second circuit board 50 .

[0138] In some embodiments, the second conductor layer 51 included in the second circuit board 50 is a layer structure of the second circuit board 50 and is parallel to the largest surface of the second circuit board 50. Therefore, at least a portion of the third conductor 60 is parallel to the second circuit board 50, that is, at least a portion of the third conductor 60 is aligned with the second conductor layer 51 included in the second circuit board 50.

[0139] Wherein, similarly, when the wearable device 100 further includes a third conductor 60, and the second antenna structure A2 is constituted by at least the third conductor 60 and the second conductor layer 51 of the second circuit board 50, the wearable device 100 may further include a plurality of other feed sources (2 or more), and the plurality of other feed sources are all arranged on the second circuit board 50, and the third conductor 60 includes a plurality of feeding points corresponding to the plurality of other feed sources, and the plurality of other feed sources can excite the second antenna structure A2 to generate a plurality of electromagnetic wave signals through the corresponding plurality of other feeding points, wherein the plurality of other feeding points are arranged at intervals. Wherein, the other feed sources may be the same as or different from the fifth feed source V5, and the other electromagnetic wave signals may be the fifth electromagnetic wave signal or an electromagnetic wave signal different from the fifth electromagnetic wave signal.

[0140] As shown in FIG17 , the fifth feeding point F5 may also be located at an edge region of the third conductor 60, or, as shown in FIG18 , the fifth feeding point F5 may also be located at a middle region of the third conductor 60. The explanation of the middle region and the edge region can be referred to the aforementioned explanation that the first feeding point F1 may be located at a middle region or an edge region of the first conductor 21, and will not be repeated here.

[0141] As shown in Figures 19 and 20, the edge portion of the second conductor layer 51 of the second circuit board 50 near the fifth feeding point F5 is electrically connected to the second conductor 41. Since the second feed source V2 or the fourth feed source V4 is disposed on the second circuit board 50, when the second feed source V2 or the fourth feed source V4 excites the second conductor 41 through the second feeding point F2, a corresponding electric field is generated on the second circuit board 50. This electric field affects the generation of the fifth electromagnetic wave signal by the fifth feed source V5 exciting the second antenna structure A2 through the fifth feeding point F5. Therefore, by electrically connecting the edge portion of the second conductor layer 51 of the second circuit board 50 near the fifth feeding point F5 to the second conductor 41, this effect can be reduced.

[0142] The edge portion of the second conductor layer 51 of the second circuit board 50 near the fifth feeding point F5 and the second conductor 41 may be connected by a direct short-circuit connection or by a low-impedance lumped or distributed device. In other embodiments, the edge portion of the second conductor layer 51 of the second circuit board 50 near the fifth feeding point F5 and the second conductor 41 may be electrically connected by other means, which are not limited herein.

[0143] Furthermore, the positions of the fifth feeding point F5, the second feeding point F2, and the fourth feeding point F4 projected on the plane where the second circuit board 50 is located do not coincide with the line connecting the center of the second circuit board 50, that is, the three lines are angled with each other, and the positions of the fifth feeding point F5 projected on the plane where the second circuit board 50 is located are respectively at an angle to the line connecting the center of the second circuit board 50 and the second feeding point F2, and the positions of the fourth feeding point F4 projected on the plane where the second circuit board 50 is located are respectively at an angle to the line connecting the center of the second circuit board 50 and the second feeding point F2. The angles of the lines connecting the centers of the circuit boards 50 are all greater than 0° and less than 360°, for example, 90° to 270°, so that when the edge portion of the second conductor layer 51 of the second circuit board 50 close to the fifth feeding point F5 is electrically connected to the second conductor 41, the second feed source V2 can still excite the second conductor 41 through the second feeding point F2 to generate a second electromagnetic wave signal, which will be staggered with the feeding path of the fourth feed source V4, and will not affect the fourth feed source V4 from exciting the second conductor 41 through the fourth feeding point F4 to generate a fourth electromagnetic wave signal.

[0144] In some embodiments, as shown in FIG21 , the first feeding point F1 and the second feeding point F2 are projected at the same or different positions on the first circuit board 30, the first electromagnetic wave signal and the second electromagnetic wave signal are signals selected from WiFi signals, Bluetooth signals, GPS signals, and cellular signals, and the first electromagnetic wave signal and the second electromagnetic wave signal are the same or different. Thus, the wearable device 100 can support WiFi signals, Bluetooth signals, GPS signals, and cellular signals, and when the first feeding point F1 and the second feeding point F2 are projected at the same or different positions on the first circuit board 30, both can be achieved by exciting the first antenna structure A1 through the first feeding point F1 and / or by exciting the second conductor 41 through the second feeding point F2 by the second feed source V1.

[0145] In some other embodiments, the first electromagnetic wave signal and the second electromagnetic wave signal may be other types of signals besides WiFi signals, Bluetooth signals, GPS signals and cellular signals, which are not limited here.

[0146] In some embodiments, as shown in Figure 22, the positions of the first feeding point F1, the second feeding point F2, and the third feeding point F3 projected on the first circuit board 30 are different, and the positions of the first feeding point F1, the second feeding point F2, and the third feeding point F3 projected on the first circuit board 30 are located on different radial lines from the line connecting the center of the first circuit board 30, the first electromagnetic wave signal, the second electromagnetic wave signal, and the third electromagnetic wave signal are signals among WiFi signals, Bluetooth signals, GPS signals, and cellular signals, and the first electromagnetic wave signal, the second electromagnetic wave signal, and the third electromagnetic wave signal are the same or at least one of them is different.

[0147] Among them, the radial line refers to the line from the center of the first circuit board 30 to one of the edge points of the first circuit board 30. When the first circuit board 30 is circular, that is, the shape of the projection of the first circuit board 30 in the direction perpendicular to the surface with the largest area of ​​the first circuit board 30 is circular, the radial line can be understood as a radius line (not as a diameter line). When the first circuit board 30 is other shapes, that is, the shape of the projection of the first circuit board 30 along the surface with the largest area of ​​the first circuit board 30 is other shapes, since the distances between the various positions of the periphery of the first circuit board 30 and the center of the first circuit board 30 are generally different, the radial line can be understood as a radius line of different lengths.

[0148] In some other embodiments, the first electromagnetic wave signal, the second electromagnetic wave signal, and the third electromagnetic wave signal may be other types of signals in addition to WiFi signals, Bluetooth signals, GPS signals, and cellular signals, which are not limited here.

[0149] In some embodiments, as shown in Figure 23, the positions of the first feeding point F1, the second feeding point F2, and the fifth feeding point F5 projected on the first circuit board 30 are different, and the positions of the first feeding point F1, the second feeding point F2, and the fifth feeding point F5 projected on the first circuit board 30 are located on different radial lines from the line connecting the center of the first circuit board 30, the first electromagnetic wave signal, the second electromagnetic wave signal, and the fifth electromagnetic wave signal are signals among WiFi signals, Bluetooth signals, GPS signals, and cellular signals, and the first electromagnetic wave signal, the second electromagnetic wave signal, and the fifth electromagnetic wave signal are the same or at least one of them is different.

[0150] In some other embodiments, the first electromagnetic wave signal, the second electromagnetic wave signal, and the fifth electromagnetic wave signal may be other types of signals besides WiFi signals, Bluetooth signals, GPS signals, and cellular signals, which are not limited here.

[0151] In other embodiments, the positions of the first feeding point F1 and the fifth feeding point F5 projected onto the first circuit board 30 may also be the same.

[0152] In some embodiments, the wearable device 100 is a smart watch and has a size of approximately 40mm×45mm×12mm. Under this overall size, the preferred sizes of the first conductor 21, the first circuit board 30, and the second conductor 41 in the structure of Figure 4 are determined, and the simulation test diagrams of Figures 24 to 38 are obtained by testing under this preferred size. Figure 24 illustrates the return loss curve S1, the system radiation efficiency curve Sr1, and the system total efficiency curve St1 of the first antenna structure A1 when transmitting and receiving electromagnetic wave signals under the excitation of the first feed source V1. The horizontal axis in Figure 24 is the frequency (in GHz) and the vertical axis is the amplitude (in dB). The input return loss is the reflection coefficient of the first electromagnetic wave signal generated by the first feed source V1 to excite the first antenna structure A1. The frequency corresponding to the valley point of the input return loss can generally correspond to the resonant frequency when the first feed source V1 excites the first antenna structure A1.

[0153] As can be seen from Figure 24, the input return loss curve S1 has two valley points P1 and P2, and the frequencies corresponding to the two valley points P1 and P2 are 2.06 GHz and 2.48 GHz respectively. Among them, the frequency 2.06 GHz corresponding to the valley point P1 is the first resonant frequency when the first feed source V1 excites the first antenna structure A1 to work, and the frequency 2.48 GHz corresponding to the valley point P2 is the second resonant frequency when the first feed source V1 excites the first antenna structure A1 to work.

[0154] It can be seen that when the first antenna structure A1 transmits and receives electromagnetic wave signals under the excitation of the first feed source V1, the input return loss near the first resonant frequency of 2.06 GHz is low, and the input return loss near the second resonant frequency of 2.48 GHz is also low. Therefore, the first antenna structure A1 can work well near the first resonant frequency and the second resonant frequency.

[0155] FIG24 also shows that the system radiation efficiency curve Sr1 of the first antenna structure A1 when transmitting and receiving electromagnetic wave signals under the excitation of the first feed source V1 is relatively high within the frequency band of 2.06 GHz to 2.48 GHz. The system total efficiency curve St1 of the first antenna structure A1 when transmitting and receiving electromagnetic wave signals under the excitation of the first feed source V1 is also relatively high within the frequency band of 2.06 GHz to 2.48 GHz. Thus, the first antenna structure A1 can operate well within the frequency band of 2.06 GHz to 2.48 GHz under the excitation of the first feed source V1.

[0156] Figure 25 is a cross-sectional schematic diagram of the wearable device 100 illustrating the electric field distribution when the first feed source V1 excites the first antenna structure A1 operating at a first resonant frequency of 2.05 GHz near 2.06 GHz. Figure 25 illustrates the wearable device 100 as a smartwatch, and can be a cross-sectional schematic diagram taken along the 9 o'clock to 3 o'clock direction of the smartwatch. As can be seen from Figure 25 , at this time, the normal component of the electric field of the first antenna structure A1 is relatively large. Consequently, the electric field generated by the first antenna structure A1 is not easily absorbed by the human body.

[0157] Figure 26 shows the antenna radiation pattern when the first feed source V1 excites the first antenna structure A1 operating at the first resonant frequency of 2.06 GHz. As can be seen from Figure 26, when operating at the first resonant frequency of 2.06 GHz, the first antenna structure A1 has good radiation performance in the vertical direction, and the antenna directivity at this time is 6.556 dBi. This indicates that the first antenna structure A1 has a strong ability to radiate or receive signals in the vertical direction. The vertical direction may refer to a direction perpendicular to at least a portion of the first conductor 21 and the first circuit board 30.

[0158] Figure 27 shows the current distribution when the first feed source V1 excites the first antenna structure A1 at the first resonant frequency of 2.05 GHz. As can be seen from Figure 27, the current flows along the long side of the first conductor 21. Therefore, the resonant frequency of the first antenna structure A1 is determined at least by the length of the long side of the first conductor 21.

[0159] Figure 28 is a cross-sectional schematic diagram of the electric field distribution when the first feed source V1 excites the first antenna structure A1 operating at the second resonant frequency of 2.5 GHz. Figure 28 illustrates the wearable device 100 as a smartwatch, and can be a cross-sectional schematic taken along the 9 o'clock to 3 o'clock direction of the smartwatch. At this point, the normal component of the electric field of the first antenna structure A1 is large. Consequently, the electric field generated by the first antenna structure A1 is not easily absorbed by the human body.

[0160] Figure 29 shows the antenna radiation pattern when the first feed source V1 excites the first antenna structure A1 operating at the second resonant frequency of 2.5 GHz. As can be seen from Figure 25 , the first antenna structure A1 has good radiation performance in the vertical direction, and the antenna directivity at this time is 6.791 dBi. This indicates that the first antenna structure A1 has a strong ability to radiate or receive signals in the vertical direction. The vertical direction may refer to a direction perpendicular to at least a portion of the first conductor 21 and the first circuit board 30.

[0161] Figure 30 shows the current distribution when the first feed source V1 excites the first antenna structure A1 operating at the second resonant frequency of 2.5 GHz. As can be seen from Figure 30 , the current flows along the short side of the first conductor 21. Therefore, the resonant frequency of the first antenna structure A1 is determined at least based on the length of the short side of the first conductor 21.

[0162] Figure 31 illustrates the return loss curve S2, system radiation efficiency curve Sr2, and system total efficiency curve St2 of the second feed source V2. As can be seen from Figure 31, the input return loss curve S2 has a valley point P3, which corresponds to a frequency of 1.43 GHz. The frequency 1.43 GHz corresponding to the valley point P3 is the third resonant frequency when the second feed source V2 excites the second conductor 41.

[0163] It can be seen that the electromagnetic wave signal generated by the second conductor 41 under the excitation of the second feed source V2 has a low input return loss near the third resonant frequency of 1.43 GHz, so that the second conductor 41 can work well near the third resonant frequency.

[0164] FIG32 is a schematic diagram of a first return loss curve and an isolation curve of the wearable device 100. FIG32 is a schematic diagram of a return loss curve and an isolation curve obtained by simulation testing of the wearable device 100 including both the first antenna structure A1 and the second conductor 41 in any of the aforementioned embodiments operating in the 2.5 GHz and 1.43 GHz frequency bands.

[0165] Specifically, the wearable device 100 operates in the 2.5 GHz frequency band because the first feed source V1 of the wearable device 100 excites the first antenna structure A1 and operates in the 2.5 GHz frequency band. The wearable device 100 operates in the 1.43 GHz frequency band because the second feed source V2 of the wearable device 100 excites the second conductor 41 and operates in the 1.43 GHz frequency band.

[0166] 32 illustrates a return loss curve S1 of the wearable device 100 operating in the 2.5 GHz frequency band, a return loss curve S2 operating in the 1.43 GHz frequency band, and an isolation curve S20 reflecting the isolation between the 2.5 GHz frequency band and the 1.43 GHz frequency band.

[0167] The lower the absolute value of isolation corresponding to isolation curve S20, the worse the isolation, and vice versa. As shown in Figure 32, the corresponding isolation value at 2.5 GHz is less than -24 dB, while the corresponding isolation value at 1.43 GHz is approximately -18 dB. Therefore, it can be seen that the isolation between the 2.5 GHz and 1.43 GHz bands is very good, and there is little interference between the two bands when they operate simultaneously.

[0168] Figure 33 is a simulation diagram of the system radiation efficiency curve Sr1 of the first feed source V1 and the system radiation efficiency curve Sr2 of the second feed source V2 when the wearable device 100 is worn on the arm. It can be seen from Figure 33 that the system radiation efficiency excited by the first feed source V1 is higher than the system radiation efficiency of the second feed source V2 in the entire frequency band.

[0169] According to the previous analysis, the first antenna structure A1 can work well near the frequency bands of 2.07 GHz and 2.48 GHz under the excitation of the first feed source V1, close to WiFi signals, Bluetooth signals and GPS signals, and the second conductor 41 can work well near the frequency of 1.43 GHz under the excitation of the second feed source V2, close to some cellular signals. Therefore, in some embodiments, when the wearable device 100 includes the structure of Figure 9, as shown in Figure 34, the wearable device 100 also includes a first matching circuit 103, a second matching circuit 104 and a third matching circuit 105, the first matching circuit 103 is connected between the first feed source V1 and the first feeding point F1, and the first matching circuit 103 is used to adjust the first electrical signal output by the first feed source V1 so that the frequency band of the first electromagnetic wave signal generated based on the first electrical signal is the GPSL1 frequency band. The second matching circuit 104 is connected between the second feed source V2 and the second feeding point F2. The second matching circuit 104 is used to adjust the second electrical signal output by the second feed source V2 so that the frequency band of the second electromagnetic wave signal generated based on the second electrical signal is a cellular frequency band (which can be a low frequency band, a medium frequency band, and / or a high frequency band). The third matching circuit 105 is connected between the third feed source V3 and the third feeding point F3. The third matching circuit 105 is used to adjust the third electrical signal output by the third feed source V3 so that the frequency band of the third electromagnetic wave signal generated based on the third electrical signal is a 2.4 GHz WiFi signal or a Bluetooth signal (i.e., the first electromagnetic wave signal is a WiFi signal or a Bluetooth signal).

[0170] The first matching circuit 103 and the third matching circuit 105 may be composed of capacitors and / or inductors and / or resistors.

[0171] As shown in Figure 34, in some embodiments, the second matching circuit 104 includes a main matching circuit 1041, a low-frequency matching branch 1042, an intermediate-frequency matching branch 1043, a high-frequency matching branch 1044, a first switch unit SW1, a second switch unit SW2 and a third switch unit SW3. The main matching circuit 1041 is connected between the second feed source V2 and the second feeding point F2, the low-frequency matching branch 1042 and the first switch unit SW1 are connected in series between the second feeding point F2 and the ground, the intermediate-frequency matching branch 1043 and the second switch unit SW2 are connected in series between the second feeding point F2 and the ground, and the high-frequency matching branch 1044 and the third switch unit SW3 are connected in series between the second feeding point F2 and the ground. When it is necessary to adjust the second electrical signal so that the frequency band of the second electromagnetic wave signal generated based on the second electrical signal is a low frequency band, the first switch unit SW1 is turned on, and the second switch unit SW2 and the third switch unit SW3 are disconnected; when it is necessary to adjust the second electrical signal so that the frequency band of the second electromagnetic wave signal generated based on the second electrical signal is a medium frequency band, the second switch unit SW2 is turned on, and the first switch unit SW1 and the third switch unit SW3 are disconnected; when it is necessary to adjust the second electrical signal so that the frequency band of the second electromagnetic wave signal generated based on the second electrical signal is a high frequency band, the third switch unit SW3 is turned on, and the first switch unit SW1 and the second switch unit SW2 are disconnected.

[0172] The main matching circuit 1041 , the low-frequency matching branch 1042 , the intermediate-frequency matching branch 1043 , and the high-frequency matching branch 1044 are respectively composed of capacitors and / or inductors and / or resistors.

[0173] In some embodiments, as shown in FIG22 , the first feeding point F1 is located at the 7 o'clock position of the wearable device 100, the second feeding point F2 is located at the 10 o'clock position of the wearable device 100, and the third feeding point F3 is located at the 2 o'clock position of the wearable device 100. In this case, a test is performed to obtain FIG35-FIG45.

[0174] Figure 35 shows a simulation of the return loss curve S3, system radiation efficiency curve Sr3, and system total efficiency curve St3 of the signal generated by the first feed source V1 through the first matching circuit to stimulate the first antenna structure A1. As can be seen from Figure 35, the input return loss curve S3 has a valley point P4, which corresponds to a frequency of 1.575 GHz, which falls within the GPS L1 frequency band. Therefore, the first feed source V1 can stimulate the first antenna structure A1 through the first matching circuit to generate a GPS signal.

[0175] Figure 36 shows the antenna radiation pattern when the first feed source V1, through the first matching circuit, stimulates the first antenna structure A1 to generate GPS signals. As can be seen from Figure 36, the first antenna structure A1 exhibits strong vertical radiation performance, with a directivity of 6.053 dBi. This demonstrates the first antenna structure A1's strong ability to radiate or receive signals in the vertical direction.

[0176] Figure 37 shows a simulation of the return loss curve S4, system radiation efficiency curve Sr4, and system total efficiency curve St4 of the signal generated by the third feed source V3 through the third matching circuit to stimulate the first antenna structure A1. As can be seen from Figure 37, the input return loss curve S4 has two valleys, P5 and P6. Valley P5 corresponds to a frequency of 2.15 GHz, and valley P6 corresponds to a frequency of 2.45 GHz.

[0177] The system radiation efficiency curve Sr4 of the signal generated by the first antenna structure A1 when excited by the third feed source V3 through the third matching circuit is relatively high within the frequency band of 2.15 GHz to 2.45 GHz. The system total efficiency curve St4 of the electromagnetic wave signal generated by the first antenna structure A1 when excited by the third feed source V3 through the third matching circuit is also relatively high within the frequency band of 2.45 GHz. Thus, the first antenna structure A1, when excited by the third feed source V3 through the third matching circuit, can operate well within the frequency band near 2.45 GHz, that is, it can operate well within the Bluetooth frequency band and the Wi-Fi frequency band (2.4-2.483 GHz).

[0178] Figure 38 shows the antenna radiation pattern when the third feed source V3, through the third matching circuit, stimulates the first antenna structure A1 to generate a signal. As can be seen from Figure 38, the first antenna structure A1 exhibits strong radiation in the vertical direction, but weaker radiation in other directions. Furthermore, the antenna directivity is 5.883 dBi. This indicates that the first antenna structure A1 has a strong ability to radiate or receive signals in the vertical direction.

[0179] Figure 39 shows a simulation of the return loss curves S5 and S6, and efficiency curves Sr5 and Sr6, of the signal generated by the second feed source V2 through the second matching circuit. As can be seen from Figure 39, low-frequency (B5 and B8 bands) cellular signals can be generated.

[0180] Figure 40 shows a simulation of the return loss curves S7 and S8 and efficiency curves Sr7 and Sr8 of the signal generated by the second feed source V2 through the second matching circuit. As can be seen from Figure 40, intermediate frequency (B1 and B3 bands) cellular signals can be generated.

[0181] Figure 41 shows a simulation of the return loss curve S9 and efficiency curve Sr9 of the signal generated by the second feed source V2 through the second matching circuit to stimulate the second conductor 41. As can be seen from Figure 41, high-frequency (B40 and B41 bands) cellular signals can be stimulated.

[0182] FIG42 is a schematic diagram of a second return loss curve and an isolation curve of the wearable device 100. FIG42 is a schematic diagram of a return loss curve and an isolation curve obtained by simulation testing of the wearable device 100 including both the first antenna structure A1 and the second conductor 41 in any of the aforementioned embodiments operating in the GPS L1 and B3 frequency bands.

[0183] Specifically, the wearable device 100 operates in the GPS L1 frequency band because the first feed source V1 of the wearable device 100 excites the first antenna structure A1 through the first matching circuit and operates in the GPS L1 frequency band. The wearable device 100 operates in the B3 frequency band because the second feed source V2 of the wearable device 100 excites the second conductor 41 through the second matching circuit and operates in the B3 frequency band.

[0184] 42 illustrates a return loss curve S10 of the wearable device 100 operating in the GPS L1 frequency band, a return loss curve S11 operating in the B3 frequency band, and an isolation curve S21 reflecting the isolation between the GPS L1 frequency band and the B3 frequency band.

[0185] The lower the absolute isolation value corresponding to isolation curve S21, the worse the isolation, and vice versa. Figure 42 shows that the isolation value corresponding to the resonant frequency of 1.75 GHz in the B3 band is approximately -16 dB, while the isolation value corresponding to the resonant frequency of 1.575 GHz in the GPS L1 band is approximately -20 dB. This indicates that the isolation between the GPS L1 and B3 bands is excellent, and there is minimal mutual interference when the two bands operate simultaneously.

[0186] FIG43 is a schematic diagram of a third return loss curve and isolation curve for the wearable device 100. Specifically, FIG43 shows a simulation of the return loss curve S12 of the third feed source V3 stimulating the first antenna structure A1 via the third matching circuit to generate a 2.4 GHz Bluetooth signal, and the return loss curve S13 and isolation curve S23 of the second feed source V2 stimulating the second conductor 41 via the second matching circuit to generate a cellular signal in the B41 frequency band. FIG43 shows that when the third feed source V3 stimulating the first antenna structure A1 via the third matching circuit to operate in the 2.4 GHz frequency band, the isolation is approximately -18 dB. When the second feed source V2 stimulating the second conductor 41 via the second matching circuit to operate in the B41 frequency band (2.496 GHz to 2.69 GHz), the isolation is approximately -13 dB to -10 dB. Therefore, the isolation between the 2.4 GHz and B41 frequency bands is relatively good; therefore, both can operate simultaneously.

[0187] Figure 44 is a simulation diagram of the return loss curve of the first feed source V1 exciting the first antenna structure A1 to generate a GPS signal through the first matching circuit when the second feed source V2 switches cellular signals of different frequency bands through the second matching circuit. It can be seen from Figure 44 that when the cellular signal switches to different frequency bands, the impact on the GPS signal is relatively small.

[0188] Figure 45 is a simulation diagram of the return loss curve when the second feed source V2 switches cellular signals of different frequency bands through the second matching circuit, and the third feed source V3 excites the first antenna structure A1 through the third matching circuit to generate a Bluetooth signal. It can be seen from Figure 45 that when the cellular signal switches between different frequency bands, the impact on the Bluetooth signal is relatively small.

[0189] Thus, the first feeding point F1 is located at the 2 o'clock direction of the wearable device 100 to generate a GPS signal, the second feeding point F2 is located at the 10 o'clock direction of the wearable device 100 to generate a cellular signal, and the third feeding point F3 is located at the 3 o'clock direction of the wearable device 100 to generate a Bluetooth signal, which can have a better effect.

[0190] In other embodiments, the positions of the first feeding point F1, the second feeding point F2, and the third feeding point F3 may also be other positions, which are not limited here. The first feed source V1 may excite the first antenna structure A1 to generate a GPS signal through the first matching circuit.

[0191] Among them, the first feeding point F1, the third feeding point F3 and the fifth feeding point F5 can be adaptively replaced with each other, which implies that when replaced, the first feeding point F1 and the first feed source V1 are regarded as one body, the third feeding point F3 and the third feed source V3 are regarded as one body, and the fifth feeding point F5 and the fifth feed source V5 are regarded as one body.

[0192] Similarly, the second feeding point F2 and the fourth feeding point F4 can also be replaced with each other. Similarly, it is also implied here that the second feeding point F2 and the second feed source V2 are replaced as a whole, and the fourth feeding point F4 and the fourth feed source V4 are replaced as a whole.

[0193] In the description of this application, unless otherwise specified or limited, the term "connection" should be understood in a broad sense. For example, it can mean a fixed connection, a detachable connection, or an integral connection; it can mean a direct connection, an indirect connection through an intermediate medium, or internal communication between two components; it can mean a communication connection; or it can mean an electrical connection. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0194] In the description of this application, the terms "first", "second", "third", etc. are used to distinguish different objects rather than to describe a specific order. In addition, the terms "upper", "lower", "inner", "outer", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on this application.

[0195] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0196] Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute a separate or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0197] The above is an implementation method of the embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the embodiment of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. A wearable device, characterized in that: The wearable device comprises: Display screen; A bottom housing including a first conductor, wherein the first conductor includes a first feed point; A first circuit board, located between the first conductor and the display screen, the first circuit board comprising a first conductor layer; A first feed source is disposed on the first circuit board, and the first feed source is electrically connected to the first feeding point; The first conductor is spaced apart from the first circuit board; the first feed source is used to excite the first antenna structure to generate a first electromagnetic wave signal through the first feeding point, wherein the first antenna structure is at least composed of the first conductor and the first conductor layer of the first circuit board.

2. The wearable device according to claim 1, characterized in that: At least a portion of the first conductor is parallel to the first circuit board.

3. The wearable device according to claim 1, characterized in that: The first antenna structure is a cavity antenna structure or a patch antenna structure.

4. The wearable device according to claim 3, characterized in that: The resonant frequency of the first antenna structure is determined based on at least a long side length and / or a short side length of the first conductor.

5. The wearable device according to claim 1, characterized in that: The wearable device further includes: a second feed source and a frame, wherein the frame includes a second conductor; The second conductor includes a second feeding point, the frame is arranged between the display screen and the bottom shell, and there is a gap between the second conductor and the first conductor; The second feed source is electrically connected to the second feeding point, and the second feed source is used to excite the second conductor through the second feeding point to generate a second electromagnetic wave signal.

6. The wearable device according to claim 5, characterized in that: The gap between the second conductor and the first conductor is at least for the first electromagnetic wave signal to be radiated from the wearable device.

7. The wearable device according to claim 6, characterized in that: The first conductor is partially electrically connected to the first conductor layer of the first circuit board.

8. The wearable device according to claim 6, characterized in that: The first conductor is partially electrically connected to the second conductor.

9. The wearable device according to claim 1, characterized in that: The bottom shell also includes a bottom shell body; The first conductor is a metal sheet disposed on the bottom shell body; or, The first conductor is a metal layer formed on the inner surface and / or outer surface of the bottom shell body by a preparation process.

10. The wearable device according to claim 1, characterized in that: The first feeding point is arranged in an edge area or a middle area of ​​the first conductor.

11. The wearable device according to claim 5, characterized in that: The wearable device also includes a third feed source, which is arranged on the first circuit board; the first conductor also includes a third feeding point, which is spaced apart from the first feeding point; the third feed source is connected to the third feeding point, and is used to excite the first antenna structure to generate a third electromagnetic wave signal through the third feeding point.

12. The wearable device according to claim 5, characterized in that: The second feed source is arranged on the first circuit board.

13. The wearable device according to claim 12, characterized in that: An edge portion of the first conductor layer of the first circuit board close to the first feeding point is electrically connected to the second conductor.

14. The wearable device according to claim 12, characterized in that: The wearable device also includes a fourth feed source, and the second conductor also includes a fourth feeding point, the fourth feeding point is spaced apart from the second feeding point, the fourth feed source is disposed on the first circuit board and connected to the fourth feeding point, and the fourth feed source excites the second conductor to generate a fourth electromagnetic wave signal through the fourth feeding point.

15. The wearable device according to claim 5, characterized in that: The wearable device also includes a second circuit board; The second circuit board is arranged between the first circuit board and the display screen; The second feed source is disposed on the first circuit board or the second circuit board.

16. The wearable device according to claim 15, characterized in that: The second feed source is arranged on the first circuit board, the wearable device also includes a fourth feed source, the second conductor also includes a fourth feeding point, the fourth feed source is arranged on the second circuit board and connected to the fourth feeding point, and the fourth feed source excites the second conductor to generate a fourth electromagnetic wave signal through the fourth feeding point.

17. The wearable device according to claim 15, characterized in that: The wearable device also includes a fourth feed source, and the second conductor also includes a fourth feeding point. The fourth feed source is connected to the fourth feeding point and is used to excite the second conductor to generate a fourth electromagnetic wave signal through the fourth feeding point, wherein the second feed source and the fourth feed source are both arranged on the second circuit board.

18. The wearable device according to any one of claims 15 to 17, characterized in that: The wearable device also includes a third conductor, which is arranged between the first circuit board and the second circuit board and is spaced apart from the first circuit board and the second circuit board. The periphery of the third conductor is connected to the inner surface of the second conductor or is spaced apart from the inner surface of the second conductor and the spacing is less than or equal to a preset distance. The third conductor is at least used to isolate the electromagnetic wave signal generated by the feed source excitation arranged on the first circuit board and the electromagnetic wave signal generated by the feed source excitation arranged on the second circuit board from each other.

19. The wearable device according to claim 18, characterized in that: At least a portion of the third conductor is parallel to the second circuit board, the second circuit board includes a second conductor layer, the third conductor includes a fifth feeding point, the wearable device also includes a fifth feed source, the fifth feed source is arranged on the second circuit board, and the fifth feed source excites the second antenna structure to generate a fifth electromagnetic wave signal through the fifth feeding point, wherein the second antenna structure is composed of at least the third conductor and the second conductor layer of the second circuit board.

20. The wearable device according to claim 5, characterized in that: The positions of the first feeding point and the second feeding point projected on the first circuit board are the same or different, the first electromagnetic wave signal and the second electromagnetic wave signal are signals among WiFi signals, Bluetooth signals, GPS signals and cellular signals, and the first electromagnetic wave signal and the second electromagnetic wave signal are the same or different.

21. The wearable device according to claim 11, characterized in that: The positions of the first feeding point, the second feeding point and the third feeding point projected on the first circuit board are different, and the positions of the first feeding point, the second feeding point and the third feeding point projected on the first circuit board are located on different radial lines from the line connecting the center of the first circuit board, the first electromagnetic wave signal, the second electromagnetic wave signal and the third electromagnetic wave signal are signals among WiFi signals, Bluetooth signals, GPS signals and cellular signals, and the first electromagnetic wave signal, the second electromagnetic wave signal and the third electromagnetic wave signal are the same or at least one of them is different.

22. The wearable device according to claim 19, characterized in that: The positions of the first feeding point, the second feeding point and the fifth feeding point projected on the first circuit board are different, and the positions of the first feeding point, the second feeding point and the fifth feeding point projected on the first circuit board are located on different radial lines from the line connecting the center of the first circuit board, the first electromagnetic wave signal, the second electromagnetic wave signal and the fifth electromagnetic wave signal are signals among WiFi signals, Bluetooth signals, GPS signals and cellular signals, and the first electromagnetic wave signal, the second electromagnetic wave signal and the fifth electromagnetic wave signal are the same or at least one of them is different.

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