Wearable device

Abstract

The invention provides wearable equipment. The wearable equipment comprises a display screen, a bottom shell, a first circuit board and a first feed source, the bottom shell comprises a first conductor, and the first conductor comprises a first feeding point; the first circuit board is located between the first conductor and the display screen and comprises a first conductor layer; the first feed source is arranged on the first circuit board, and the first feed source is electrically connected with the first feeding point; the first conductor and the first circuit board are arranged at intervals; the first feed source is used for exciting the first antenna structure to generate a first electromagnetic wave signal through the first feed point, and the first antenna structure is at least composed of a first conductor and a first conductor layer of the first circuit board. The antenna performance of the wearable device 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

Technical Field

[0001] This application relates to the technical field of electronic devices, and particularly to a wearable device. Background Art

[0002] As the screen ratio of electronic devices is getting higher and higher, the gap between the frame and the screen is required to be smaller and smaller. However, this makes it more and more difficult for the electromagnetic wave signal excited by the antenna component composed of the screen to radiate out from the gap between the frame and the screen, resulting in poor antenna performance. Therefore, it becomes very important to design an antenna in the case of a high screen ratio.

[0003] In addition, since the human body is a dielectric, when a wearable device approaches the human body, the human body will absorb the electromagnetic energy of the wearable device, resulting in the deterioration of the antenna performance of the wearable device. According to the 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 relatively easy to enter the human body and be absorbed, while the normal component of the electric field relative to the human body surface is not easy to enter the human body and thus not easy to be absorbed. Therefore, designing an antenna that presents a normal electric field distribution relative to the human body surface can obtain a smaller influence of human body absorption or even enhance the antenna performance by the human body, thereby effectively solving the problem of the deterioration of the antenna performance caused by human body absorption after the wearable device is worn on the human body. Summary of the Invention

[0004] For this reason, this application provides a wearable device to reduce signal attenuation and thereby increase the signal coverage range.

[0005] This application provides a wearable device, which includes: a display screen, a bottom case, a first circuit board, and a first feeder; the bottom case includes a first conductor, and the first conductor includes a first feeding point; the first circuit board is located between the first conductor and the display screen, and the first circuit board includes a first conductor layer; the first feeder is disposed on the first circuit board and is electrically connected to the first feeding point; the first conductor and the first circuit board are spaced apart; the first feeder is used to excite a first antenna structure through the first feeding point to generate a first electromagnetic wave signal, wherein the first antenna structure is at least composed of the first conductor and the first conductor layer of the first circuit board. Since the bottom case includes a first conductor and does not generate an electromagnetic wave signal by exciting the metal layer on the display screen, it is not necessary to completely radiate the electromagnetic wave signal through the gap beside the display screen, and the gap for radiating the first electromagnetic wave signal can be set between the display screen and the bottom case. Thus, in the case of an increasing screen ratio, the size of the gap for radiating the first electromagnetic wave signal is not affected, so as to reduce the attenuation of the first electromagnetic wave signal and thereby increase the radiation efficiency of the first electromagnetic wave signal.

[0006] In a possible implementation, at least a part of the first conductor is parallel to the first circuit board. Since the bottom shell is close to the human skin when the wearable device is worn, the bottom shell includes the first conductor, and the first antenna structure is at least composed of 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 through the first feeding point to generate a first electromagnetic wave signal, and at least a part of the first conductor is parallel to the first circuit board. Therefore, when the first feed source excites the first antenna structure through the first feeding point to generate a first electromagnetic wave signal, an electric field perpendicular to at least a part of the first conductor and the first circuit board will be excited in the first antenna structure. Since the first conductor is disposed on the bottom shell, the first conductor is also substantially parallel to the bottom shell. Therefore, when the wearable device is worn, the electric field generated by the first antenna structure is a normal electric field relative to the human body, that is, perpendicular to the skin surface of the body part where the wearable device is worn. Since the human body is not easy to absorb the normal electric field, that is, not easy to absorb the electric field perpendicular to the human body surface, therefore, compared with generating a tangential electric field, the attenuation of the first electromagnetic wave signal can be reduced and its coverage range can be increased.

[0007] In a 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 directivity can be optimized and the radiation efficiency can be enhanced.

[0008] In a possible implementation, the resonant frequency of the first antenna structure is determined based on at least the long side length and / or the short side length of the first conductor. Thus, the resonant frequency of the first antenna structure can be adjusted to a target resonant frequency by adjusting the long side length and / or the short side length of the first conductor.

[0009] In a possible implementation, the wearable device further includes a second feed source and a frame, and the frame includes a second conductor; the second conductor includes a second feeding point, the frame is disposed 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 on the frame to generate a second electromagnetic wave signal through the second feeding point. Thus, the frame structure of the wearable device can be fully utilized. The frame not only has a supporting function, but also the second feed source can excite the second conductor on the frame to generate a second electromagnetic wave signal, realizing multiple functions.

[0010] In a possible implementation, the gap between the second conductor and the first conductor allows at least the first electromagnetic wave signal to radiate out of the wearable device. Since the screen ratio is getting higher and higher, there is no need to reduce the size of 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 reasonably set to avoid attenuation of the first electromagnetic wave signal caused by the reduction of the gap size, and further avoid the reduction of the coverage range of the first electromagnetic wave signal.

[0011] In a possible implementation, the first conductor is locally electrically connected to the first conductor layer of the first circuit board. Since when the wearable device is worn, the bottom shell is close to the human skin, the bottom shell includes a first conductor, and there is a gap between the second conductor and the first conductor, and the gap between the second conductor and the first conductor allows at least the first electromagnetic wave signal to radiate out of the wearable device. However, in some scenarios, for example, when the wearable device is worn tightly on the human body, it will be squeezed with the human body, resulting in part of the wearable device being recessed into the skin, and then the gap between the second conductor and the first conductor is blocked due to the corresponding part being recessed 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. By locally electrically connecting the first conductor to the first conductor layer of the first circuit board (directly short-circuit connecting or connecting through a small-impedance lumped or distributed device), the influence of the human body blocking the gap on the electric field generated by the first antenna structure can be eliminated or weakened. Therefore, when part of the wearable device is recessed into the skin, good radiation performance can still be ensured.

[0012] In a possible implementation, the first conductor is locally electrically connected to the second conductor (directly short-circuit connecting or connecting through a small-impedance lumped or distributed device). This is also equivalent to short-circuiting, thereby eliminating or weakening the influence of the human body blocking the gap on the electric field generated by the first antenna structure. Therefore, when part of the wearable device is recessed into the skin, good radiation performance can still be ensured.

[0013] In a possible implementation, 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 surface and / or outer surface of the bottom shell body by a manufacturing process. Since the first conductor participates in forming the first antenna structure, in order to improve the radiation performance, there are corresponding special requirements for the shape and structure of the first conductor. Since the bottom shell includes a bottom shell body, and the structure of the bottom shell body allows for more diverse designs, it can better meet the appearance design requirements of the wearable device.

[0014] In a possible implementation, the first feeding point is disposed in an edge region or a middle region of the first conductor. Since the mode of disposing the first feeding point in the edge region of the first conductor is different from that in the middle region, accordingly, the first antenna structure in different modes can respectively generate corresponding electromagnetic wave signals.

[0015] In a possible implementation, the wearable device further includes a third feeding source disposed on the first circuit board; the first conductor further includes a third feeding point spaced apart from the first feeding point; the third feeding source is connected to the third feeding point and is configured to excite the first antenna structure through the third feeding point to generate a third electromagnetic wave signal. Accordingly, the first antenna structure can be excited by multiple feeding sources to respectively generate corresponding electromagnetic wave signals.

[0016] In a possible implementation, the second feeding source is disposed on the first circuit board. Since it is convenient to dispose various electronic components on the first circuit board, it is relatively simple to dispose the second feeding source on the first circuit board.

[0017] In a possible implementation, an edge portion of the first conductor layer of the first circuit board near the first feeding point is electrically connected to the second conductor. Since the second feeding source is disposed on the first circuit board, an electric field will be generated when the second feeding source excites the second conductor through the second feeding point, and this electric field will, in some cases, affect the generation of the first electromagnetic wave signal by the first feeding source exciting the first antenna structure through the first feeding point. Therefore, electrically connecting the edge portion of the first conductor layer of the first circuit board near the first feeding point to the second conductor can reduce this influence.

[0018] In a possible implementation, since the second feeding source is disposed on the first circuit board, the electric field or mode generated when the second feeding source excites the second conductor through the second feeding point has a high isolation characteristic directly with the electric field or mode of the first feeding source exciting the first antenna structure to generate the first electromagnetic wave signal.

[0019] In a possible implementation, the wearable device further includes a fourth feeder, the second conductor further includes a fourth feeding point, the fourth feeding point is spaced from the second feeding point, the fourth feeder is disposed on the first circuit board and connected to the fourth feeding point, and the fourth feeder excites the second conductor to generate a fourth electromagnetic wave signal through the fourth feeding point. Thus, the first feeder, the second feeder, and the fourth feeder can be disposed on the first circuit board. The first feeder excites the first antenna structure to generate a first electromagnetic wave signal through the first feeding point, and both the second feeder and the fourth feeder generate corresponding electromagnetic wave signals by exciting the second conductor respectively.

[0020] In a possible implementation, the wearable device further includes a second circuit board; the second circuit board is disposed between the first circuit board and the display screen; the second feeder is disposed on the first circuit board or the second circuit board. Thus, when the wearable device includes the first circuit board and the second circuit board and the first feeder is disposed on the first circuit board, since the second feeder can be disposed on the first circuit board or the second circuit board, further, when setting according to the performance required by the wearable device and the layout requirements between various components, the second feeder 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 respectively.

[0021] In a possible implementation, the second feeder is disposed on the first circuit board, the wearable device further includes a fourth feeder, the second conductor further includes a fourth feeding point, the fourth feeder is disposed on the second circuit board and connected to the fourth feeding point, and the fourth feeder excites the second conductor to generate a fourth electromagnetic wave signal through the fourth feeding point. Thus, when setting according to the size of the wearable device, the required frequency band, and the layout requirements between various components, the wearable device can also support the transceiver of multiple electromagnetic wave signals in the following manner: the first feeder disposed on the first circuit board can excite the first antenna structure to generate a first electromagnetic wave signal, the second feeder disposed on the first circuit board can excite the second conductor to generate a second electromagnetic signal, and the fourth feeder disposed on the second circuit board can excite the second conductor to generate a fourth electromagnetic wave signal.

[0022] In a possible implementation, the wearable device further includes a fourth feed source, the second conductor further includes a fourth feeding point, and the fourth feed source is connected to the fourth feeding point and is configured to excite the second conductor to generate a fourth electromagnetic wave signal through the fourth feeding point. Among them, both the second feed source and the fourth feed source are disposed on the second circuit board. Thus, when setting according to the size of the wearable device, the required frequency band, and the layout requirements among various components, the wearable device can also support the transceiver of multiple electromagnetic wave signals in the following manner: the first feed source disposed on the first circuit board can excite the first antenna structure to generate a first electromagnetic wave signal, the second feed source disposed on the second circuit board can excite the second conductor to generate a second electromagnetic signal, and the fourth feed source disposed on the second circuit board can excite the second conductor to generate a fourth electromagnetic wave signal.

[0023] In a possible implementation, the wearable device further includes a third conductor, the third conductor is disposed 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 configured to isolate the electromagnetic wave signals generated by the excitation of the feed source disposed on the first circuit board and the feed source disposed on the second circuit board from each other. Thus, the isolation degree of the electromagnetic wave signals respectively generated by the excitation of the feed source on the first circuit board and the feed source on the second circuit board can be improved.

[0024] In a possible implementation, at least a part 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 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 to generate a fifth electromagnetic wave signal through the fifth feeding point. Among them, the second antenna structure is at least composed of the third conductor and the second conductor layer of the second circuit board. Thus, when setting according to the size of the wearable device, the required frequency band, and the layout requirements among various components, the wearable device can also support the transceiver 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, where the second antenna structure is at least composed of the third conductor and the second conductor layer of the second circuit board.

[0025] In a possible implementation, the positions of the first feeding point and the second feeding point projected onto 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. Thus, the wearable device can support WiFi signals, Bluetooth signals, GPS signals, and cellular signals, and in the case where the positions of the first feeding point and the second feeding point projected onto the first circuit board are the same or different, both can be realized by the first feeding source exciting the first antenna structure through the first feeding point and / or by the second feeding source exciting the second conductor through the second feeding point.

[0026] In a possible implementation, the positions of the first feeding point, the second feeding point, and the third feeding point projected onto the first circuit board are different, and the lines connecting the positions of the first feeding point, the second feeding point, and the third feeding point projected onto the first circuit board to the center of the first circuit board are located on different radial lines. 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.

[0027] In a possible implementation, the positions of the first feeding point, the second feeding point, and the fifth feeding point projected onto the first circuit board are different, and the lines connecting the positions of the first feeding point, the second feeding point, and the fifth feeding point projected onto the first circuit board to the center of the first circuit board are located on different radial lines. 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. Thus, the wearable device can support WiFi signals, Bluetooth signals, GPS signals, and cellular signals. The lines connecting the positions of the first feeding point, the second feeding point, and the fifth feeding point projected onto the first circuit board to the center of the first circuit board are located on different radial lines. Compared with the case where the lines connecting 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 to the center of the first circuit board are located on the same radial line, the mutual influence among the first electromagnetic wave signal, the second electromagnetic wave signal, and the fifth electromagnetic wave signal can be reduced. Description of the Drawings

[0028] To more clearly illustrate the technical solutions of the present application, the accompanying drawings required for the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other accompanying drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 Schematic diagram of the three-dimensional structure of the wearable device provided by some embodiments of the present application;

[0030] Figure 2 Schematic diagram of the structure of the first possible wearable device provided by an embodiment of the present application;

[0031] Figure 3 Schematic diagram of the structure of the second possible wearable device provided by an embodiment of the present application;

[0032] Figure 4 Schematic diagram of the structure of the third possible wearable device provided by an embodiment of the present application;

[0033] Figure 5 Schematic diagram of the structure of a possible bezel provided by an embodiment of the present application;

[0034] Figure 6 Cross-sectional view of the electrical connection between the first conductor and the first conductor layer on the first circuit board provided by an embodiment of the present application;

[0035] Figure 7 Cross-sectional view of the wearable device provided by an embodiment of the present application from 9 o'clock to 3 o'clock;

[0036] Figure 8 Cross-sectional view of the partial electrical connection between the first conductor and the second conductor provided by an embodiment of the present application;

[0037] Figure 9 Schematic diagram of the structure of the fourth possible wearable device provided by an embodiment of the present application;

[0038] Figure 10 Schematic diagram of the structure of the fifth possible wearable device provided by an embodiment of the present application;

[0039] Figure 11 Schematic diagram of the structure of the fifth possible wearable device provided by an embodiment of the present application;

[0040] Figure 12 Schematic diagram of the structure of the sixth possible wearable device provided by an embodiment of the present application;

[0041] Figure 13 Schematic diagram of the structure of the seventh possible wearable device provided by an embodiment of the present application;

[0042] Figure 14 Schematic diagram of the structure of the eighth possible wearable device provided by an embodiment of the present application;

[0043] Figure 15 Schematic diagram of the structure of the ninth possible wearable device provided by an embodiment of the present application;

[0044] Figure 16 Schematic diagram of the structure of the tenth possible wearable device provided by an embodiment of the present application;

[0045] Figure 17 Schematic diagram of the structure of the eleventh possible wearable device provided by an embodiment of the present application;

[0046] Figure 18 Schematic diagram of the structure of the twelfth possible wearable device provided by an embodiment of the present application;

[0047] Figure 19 Schematic diagram of the structure of the thirteenth possible wearable device provided by an embodiment of the present application;

[0048] Figure 20 Schematic diagram of the structure of the fourteenth possible wearable device provided by an embodiment of the present application;

[0049] Figure 21 provided by an embodiment of the present application Figure 4 Schematic diagram of the three-dimensional structure from a top-down perspective;

[0050] Figure 22 provided by an embodiment of the present application Figure 8 Schematic diagram of the three-dimensional structure from a top-down perspective;

[0051] Figure 23 provided by an embodiment of the present application Figure 19 Schematic diagram of the three-dimensional structure from a top-down perspective;

[0052] Figure 24 The first antenna structure provided by an embodiment of the present application; Simulation diagrams of the return loss curve S1, the system radiation efficiency curve Sr1, and the system total efficiency curve St1 during the transceiver of electromagnetic wave signals under the excitation of the first feed source;

[0053] Figure 25 Schematic cross-sectional view of the electric field distribution when the first feed source provided by an embodiment of the present application excites the first antenna structure to operate at the first resonance frequency of 2.05 GHz;

[0054] Figure 26The antenna radiation pattern of the first feed exciting the first antenna structure provided in an embodiment of the present application when operating at the first resonant frequency of 2.06 GHz;

[0055] Figure 27 The current distribution diagram of the first feed exciting the first antenna structure provided in an embodiment of the present application when operating at the first resonant frequency of 2.05 GHz;

[0056] Figure 28 The schematic cross-sectional view of the electric field distribution of the first feed exciting the first antenna structure provided in an embodiment of the present application when operating at the second resonant frequency of 2.5 GHz;

[0057] Figure 29 The antenna radiation pattern of the first feed exciting the first antenna structure provided in an embodiment of the present application when operating at the second resonant frequency of 2.5 GHz;

[0058] Figure 30 The current distribution diagram of the first feed V1 exciting the first antenna structure provided in an embodiment of the present application when operating at the second resonant frequency of 2.5 GHz;

[0059] Figure 31 The simulation diagrams of the return loss curve S2, the system radiation efficiency curve Sr2, and the system total efficiency curve St2 of the second feed provided in an embodiment of the present application;

[0060] Figure 32 The schematic diagram of the first return loss curve and isolation curve of the wearable device provided in an embodiment of the present application;

[0061] Figure 33 The simulation diagrams of the system radiation efficiency curve Sr1 of the first feed and the system radiation efficiency curve Sr2 of the second feed when the simulated wearable device is worn on the arm provided in an embodiment of the present application;

[0062] Figure 34 The schematic diagram of the matching circuit provided in an embodiment of the present application;

[0063] Figure 35 The simulation diagrams of the return loss curve S3, the system radiation efficiency curve Sr3, and the system total efficiency curve St3 of the first feed generating a signal by exciting the first antenna structure through the first matching circuit provided in an embodiment of the present application;

[0064] Figure 36 The antenna radiation pattern of the first feed V1 generating a GPS signal by exciting the first antenna structure through the first matching circuit provided in an embodiment of the present application;

[0065] Figure 37Simulation diagrams of the return loss curve S4, system radiation efficiency curve Sr4, and system total efficiency curve St4 of signals generated by the third feed source provided in an embodiment of the present application exciting the first antenna structure through the third matching circuit;

[0066] Figure 38 Antenna radiation pattern of signals generated by the third feed source V3 exciting the first antenna structure through the third matching circuit provided in an embodiment of the present application;

[0067] Figure 39 Simulation diagrams of the return loss curves S5, S6, and efficiency curves Sr5, Sr6 of signals generated by the second feed source provided in an embodiment of the present application exciting the second conductor through the second matching circuit;

[0068] Figure 40 Simulation diagrams of the return loss curves S7, S8, and efficiency curves Sr7, Sr8 of signals generated by the second feed source provided in an embodiment of the present application exciting the second conductor through the second matching circuit;

[0069] Figure 41 Simulation diagrams of the return loss curve S9 and efficiency curve Sr9 of signals generated by the second feed source provided in an embodiment of the present application exciting the second conductor through the second matching circuit;

[0070] Figure 42 Schematic diagram of the second return loss curve and isolation curve of the wearable device provided in an embodiment of the present application;

[0071] Figure 43 Schematic diagram of the third return loss curve and isolation curve of the wearable device provided in an embodiment of the present application;

[0072] Figure 44 Simulation diagram of the return loss curve when the third feed source V3 excites the first antenna structure to generate a GPS signal through the third matching circuit while the second feed source generates cellular signals in the B1, B3, B5, and B8 frequency bands by switching through the second matching circuit provided in an embodiment of the present application;

[0073] Figure 45 Simulation diagram of the return loss curve when the first feed source excites the first antenna structure to generate a Bluetooth signal through the first matching circuit while the second feed source generates cellular signals in the B1, B3, B5, and B8 frequency bands by switching through the second matching circuit provided in an embodiment of the present application.

[0074] Reference numerals: wearable device 100, functional part 101, wearing part 102; display screen 10, bottom case 20, first circuit board 30, first feeder V1, first conductor 21, first feeding point F1, first conductor layer 31, first antenna structure A1, bottom case body 22, second feeder V2, frame 40, second conductor 41, second feeding point F2, gap D, fourth feeder V4, fourth feeding point F4, second circuit board 50, third conductor 60, second conductor layer 51, fifth feeder V5, fifth feeding point F5, second antenna structure A2, battery E. Detailed implementation manners

[0075] The embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.

[0076] Please refer to Figure 1 , which is a schematic three-dimensional structure diagram of a wearable device provided in some embodiments of the present application. Among them, the wearable device 100 may be, but is not limited to, a smart watch, a smart bracelet, a smart ring, a smart necklace, etc.

[0077] In some embodiments, as Figure 1 shown, 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 may be, but is not limited to, a watch band, a belt, a leg band, a headband, a chain, etc. The functional part 101 may be, but is 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 further may have any one or more of functions such as time display, weather display, camera, audio and video playback, motion monitoring, health monitoring, and navigation function.

[0078] As Figure 2 shown, in some embodiments, the wearable device 100 includes a display screen 10, a bottom case 20, a first circuit board 30, and a first feeder V1; the bottom case 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 feeder V1 is disposed on the first circuit board 30, and the first feeder 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 feeder V1 is configured to excite a first antenna structure A1 to generate a first electromagnetic wave signal through the first feeding point F1, where the first antenna structure A1 is at least composed of the first conductor 21 and the first conductor layer 31 of the first circuit board 30.

[0079] Since the bottom case 20 includes the first conductor 21 and does not generate electromagnetic wave signals by exciting the metal layer on the display screen, it is not necessary to radiate the electromagnetic wave signals through the gap beside the display screen. Instead, the gap for radiating the first electromagnetic wave signals can be set between the display screen 10 and the bottom case 20. Thus, in the case of an increasing screen ratio, the size of the gap for radiating the first electromagnetic wave signals is not affected, so as to reduce the attenuation of the first electromagnetic wave signals and further increase the radiation efficiency of the first electromagnetic wave signals.

[0080] Since 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, resulting in the deterioration of the antenna performance of the wearable device 100. According to the 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 relatively easy to enter the human body and be absorbed, while the normal component of the electric field relative to the human body surface is not easy to enter the human body and thus not easy to be absorbed. Therefore, designing an antenna that presents a normal electric field distribution relative to the human body surface can obtain a smaller influence of human body absorption, and even the human body will enhance the antenna performance, thereby effectively solving the problem of the deterioration of the antenna performance caused by human body absorption after the wearable device 100 is worn on the human body. In some embodiments, at least a part of the first conductor 21 is parallel to the first circuit board 30. Herein, at least a part of the first conductor 21 being parallel to the first circuit board 30 means that at least a part 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.

[0081] Herein, parallel can be understood as being substantially parallel, allowing for non - absolute parallelism due to factors such as assembly tolerances, design tolerances, and the influence of structural flatness, and allowing for errors within a small angular range. For example, within an assembly error range of less than 10 degrees, it can be understood as a parallel relationship.

[0082] In some embodiments, the first conductor layer 31 included in the first circuit board 30 is a certain layer structure in the first circuit board 30 and is parallel to the surface with the largest area of the first circuit board 30. Therefore, at least a part of the first conductor 21 being parallel to the first circuit board 30 means that at least a part of the first conductor 21 is parallel to the first conductor layer 31 included in the first circuit board 30.

[0083] When the wearable device 100 is worn, the bottom case 20 is close to the human skin. The bottom case 20 includes a first conductor 21. The first antenna structure A1 is at least composed of 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 feed point F1. And at least part 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 a first electromagnetic wave signal through the first feed point F1, an electric field perpendicular to at least part of the first conductor 21 and the first circuit board 30 will be excited in the first antenna structure A1. Since the first conductor 21 is arranged on the bottom case 20, the first conductor 21 is also substantially parallel to the bottom case 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. And because the human body is not easy to absorb the normal electric field, that is, not easy to absorb the electric field perpendicular to the human body surface. Therefore, compared with generating a tangential electric field, the attenuation of the first electromagnetic wave signal can be reduced and its coverage range can be increased. It realizes that in the case of an increasing screen-to-body ratio, by reducing the deterioration effect of human wearing on the antenna performance, the antenna performance of the wearable device under human wearing is improved.

[0084] That is, in the present application, the first antenna structure A1 is at least composed of the first conductor 21 included in the bottom case 20 and the first conductor layer 31 of the first circuit board 30. Since the generated electric field is mainly the electric field perpendicular to the first conductor 21 and the first circuit board 30, it can be avoided from being absorbed by the human body when the wearable device 100 is worn, and it can be effectively avoided from being affected by the human body, thus ensuring the antenna radiation performance.

[0085] In some embodiments, the wearable device 100 further includes a battery E, and the battery E can be arranged between the first circuit board 30 and the display screen 10. In other embodiments, the battery E can also be arranged between the bottom case 20 and the first circuit board 30.

[0086] In some embodiments, the first antenna structure A1 is a cavity antenna structure or a patch antenna structure.

[0087] Since both the cavity antenna structure and the patch antenna structure can concentrate the first electromagnetic wave signal, the radiation directivity can be optimized and the radiation efficiency can be enhanced.

[0088] Among them, the display screen 10 can be, but is not limited to, a liquid crystal display screen (LCD), an organic light-emitting diode display screen (OLED), a dot matrix display screen, a flexible display screen, a curved display screen, or other display screens. When the display screen 10 is the LCD display screen or the OLED display screen, the display screen 10 can also be a touch screen or a non-touch screen. When the display screen 10 is the touch screen, the display screen 10 can be a capacitive touch screen, a resistive touch screen, an acoustic touch screen, a force-based touch screen, a light-based touch screen, or other display screens.

[0089] Among them, the material of the first conductor 21 can be, but is not limited to, a conductive metal, a conductive alloy, a conductive polymer material, or the like.

[0090] In some embodiments, the resonance frequency of the first antenna structure A1 is at least determined based on the long side length and / or the short side length of the first conductor 21. Thus, the resonance frequency of the first antenna structure A1 can be adjusted to a target resonance frequency by adjusting the long side length and / or the short side length of the first conductor 21.

[0091] Among them, the shape of the projection of the first conductor 21 on the first circuit board 30 can be, but is not limited to, a circle, an ellipse, a rectangle, a square, a rhombus, and an irregular shape, etc. 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.

[0092] In some embodiments, such as Figure 2As shown, the bottom shell 20 also 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 surface and / or outer surface of the bottom shell body 22 through a preparation process. Since the first conductor 21 participates in forming the first antenna structure A1, in order to improve the radiation performance, there are corresponding special requirements for the shape and structure of the first conductor 21. Since the bottom shell 20 includes the bottom shell body 22, and the structure of the bottom shell body 22 allows for more diverse designs, it can better meet the appearance design requirements of the wearable device 100.

[0093] 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.

[0094] The bottom shell body 22 is made of insulating material, specifically, but not limited to, any one or a combination of plastic, fiber composite material, glass or ceramic.

[0095] Among them, and / or is just a field that describes the same associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects are in an "or" relationship.

[0096] Wherein, when the first conductor 21 is a metal sheet disposed on the bottom shell body 22, specifically, the first conductor 21 can be embedded in the bottom shell body 22. For example, during the manufacturing process, an installation gap is reserved in the bottom shell body 22, and the first conductor 21 can be installed in the installation gap. When the size of the first conductor 21 matches that of the installation gap, it can effectively prevent the first conductor 21 from moving relative to the bottom shell body 22; or, during the manufacturing process, the material of the bottom shell body 22 is in a fluid state, wraps the metal sheet, and then solidifies to form the bottom shell 20 with the metal sheet embedded and wrapped. Or, the first conductor 21 is a metal sheet disposed 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 of a split structure. Further, 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 is used as an antenna radiator, compared with other connection methods such as screwing, the bonding connection method has less influence on its current distribution. It should be noted that the first conductor 21 and the inner and outer surfaces of the bottom shell body 22 may not be connected through a connector, but are in a butt-joint state under the action of the components inside the wearable device 100. In any case, it can prevent the first conductor 21 and the bottom shell body 22 from easily displacing relative to each other.

[0097] Wherein, the first conductor 21 is a metal layer formed on the inner surface and / or outer surface of the bottom shell body 22 by PDS (Printing-Direct-Structuring) or LDS (Laser-Direct-Structuring), that is, the first conductor 21 and the bottom shell body 22 are of an integral structure, which can completely prevent the first conductor 21 and the bottom shell body 22 from displacing and is convenient for installation. When the first conductor 21 is formed on the inner surface and / or outer surface of the bottom shell body 22 by LDS, it can be that the bottom shell body 22 (a product injection-molded with special plastic particles) is activated by a laser machine and then the first conductor 21 is plated on the inner surface and / or outer surface of the bottom shell body 22. When the first conductor 21 is formed on the inner surface and / or outer surface of the bottom shell body 22 by PDS, it can be that the first conductor 21 is printed on the inner surface and / or outer surface of the bottom shell body 22, and then the first conductor 21 is formed on the inner surface and / or outer surface of the bottom shell body 22 through thermal curing. In other embodiments, the first conductor 21 can also be formed on the inner surface and / or outer surface of the bottom shell body 22 by other processes, which are not limited herein.

[0098] In other embodiments, the bottom case 20 may also be entirely made of a conductive material, that is, the bottom case 20 is the first conductor 21. At this time, the bottom case 20 may only include the first conductor 21 and not include the bottom case body 22.

[0099] In some embodiments, on the side of the first conductor 21 close to the first circuit board 30, a metal post (not labeled) may be provided at a position corresponding to the first feed point F1. On the side of the first circuit board 30 facing the first conductor 21, a metal spring piece (not labeled) is provided. The metal spring piece is electrically connected to the first feed source V1, and the metal post is electrically connected to the metal spring piece, so that the first feed source V1 is electrically connected to the first feed point F1 on the first conductor 21. In other embodiments, the first feed source V1 and the first feed point F1 may also be electrically connected in other ways, not limited to this example.

[0100] In some other embodiments, when the first conductor 21 is formed on the inner surface of the bottom case body 22, the first conductor 21 may not be provided with a metal post, and only a metal spring piece 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 feed point F1 through the metal spring piece.

[0101] Please refer to Figure 2 and Figure 3 , in some embodiments, as Figure 2 shown, the first feed point F1 is provided in the edge region of the first conductor 21, or, as Figure 3 shown, the first feed point F1 is provided in the middle region of the first conductor 21. Since the mode of setting the first feed point F1 in the edge region of the first conductor 21 is different from that in the middle region, accordingly, the first antenna structure A1 in different modes can generate corresponding electromagnetic wave signals respectively.

[0102] Among them, the middle region refers to the region including the center of the first conductor 21. For example, taking the center of the first conductor 21 as the center, the overall shape of the wearable device 100 is reduced by 1 / 2 corresponding region. The edge region refers to the region of the first conductor 21 that is not the middle region, and may also refer to a part of the region that is not the middle region. For example, the edge region may also be only the region close to the periphery of the first conductor 21. It should be noted that the division of the middle region and the edge region may also be carried out in other ways, not limited to this example.

[0103] In some embodiments, as Figure 4As shown, the wearable device 100 further includes a second feeder 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 disposed between the display screen 10 and the bottom case 20, and there is a gap D between the second conductor 41 and the first conductor 21. The second feeder V2 is electrically connected to the second feeding point F2, and the second feeder V2 is configured to excite the second conductor 41 through the second feeding point F2 to generate a second electromagnetic wave signal.

[0104] Thus, the structure of the frame 40 of the wearable device 100 can be fully utilized. The frame 40 not only has a supporting function, but also the second feeder V2 can excite the second conductor 41 on the frame 40 to generate a second electromagnetic wave signal, realizing multiple functions. Moreover, since the antenna structures and positions for exciting the first electromagnetic wave signal and the second electromagnetic wave signal are different, the performance requirements of the wearable device 100 can be met while adapting to the sizes of the bottom case 20 and the frame 40 of the wearable device 100.

[0105] In some embodiments, the frame 40 is disposed between the display screen 10 and the bottom case 20 and cooperates with the display screen 10 and the bottom case 20 to form the housing of the wearable device 100.

[0106] Wherein, the frame 40 can be entirely made of a conductive material, and the frame 40 is an integral frame, and the entire frame 40 is the second conductor 41. In some embodiments, the frame 40 is made of a conductive material, and the frame 40 is further separated into a plurality of frame segments through gaps, and the second conductor 41 can be one or some of the frame segments.

[0107] As Figure 5 shown, the frame 40 can also include the second conductor 41 and a frame body 42. The second conductor 41 can be a metal sheet disposed on the frame body 42, or the second conductor 41 is a metal layer formed on the inner surface and / or outer surface of the frame body 42 through a manufacturing process. Among them, the manner in which the second conductor 41 is disposed on the frame body 42 can refer to and be analogous to the manner in which the first conductor 21 is disposed on the bottom case body 22, which will not be elaborated here.

[0108] Among them, when the bottom case 20 further includes the bottom case body 22, whether the frame 40 is made of a conductive material or an insulating material, the first conductor 21 can be disposed at the middle position of the bottom case body 22, so that the peripheral region of the bottom case body 22 is tightly connected to the frame 40 to ensure the sealing of the housing of the wearable device 100 and ensure the mutual insulation between the first conductor 21 and the second conductor 41, that is, there is a gap D. When the bottom case 20 is entirely made of a conductive material, whether the frame 40 is made of a conductive material or an insulating material, the bottom case 20 and the end of the frame 40 close to the bottom case 20 can be hermetically connected through an insulating member to ensure the sealing of the housing of the wearable device 100 and ensure the mutual insulation between the first conductor 21 and the second conductor 41, that is, there is a gap D.

[0109] In some embodiments, the gap D between the second conductor 41 and the first conductor 21 is at least sufficient for the first electromagnetic wave signal to radiate out of the wearable device 100. Since the screen ratio is getting higher and higher, it is not necessary 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 the attenuation of the first electromagnetic wave signal caused by the reduction of the size of the gap D, and further avoid the reduction of the coverage range of the first electromagnetic wave signal.

[0110] In some embodiments, as Figure 6 shown, the first conductor 21 is partially electrically connected to the first conductor layer 31 of the first circuit board 30. Figure 7This is the illustration before connection, placed here for comparison and for convenient viewing. When the wearable device 100 is worn, the bottom case 20 is close to the human skin. The bottom case 20 includes a first conductor 21. 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 allows at least the first electromagnetic wave signal to radiate out 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 against the human body, resulting in the wearable device 100 being partially recessed into the skin. As a result, the corresponding part of the gap D between the second conductor 41 and the first conductor 21 that is recessed into the skin is blocked (for example, for a smartwatch, due to the strap, the areas near 12 o'clock and 6 o'clock of the gap D of the smartwatch are usually not blocked, while the areas near 9 o'clock and 3 o'clock of the gap D of the smartwatch are usually blocked because they are close to the human body). Since the human body is a dielectric, the human body affects the electric field generated by the first antenna structure A1 by shielding or blocking the gap D, and locally electrically connects the first conductor 21 to the first conductor layer 31 of the first circuit board 30 (directly short-circuit connection or through a small-impedance lumped or distributed device), thereby eliminating or weakening the influence 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 into the skin, good radiation performance can still be ensured.

[0111] 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, resulting in the loss of electromagnetic wave energy. Since the human body is a dielectric, when shielding or blocking the gap D, the human body is equivalent to an impedance and will affect the resonant frequency of the first antenna structure A1. Therefore, locally electrically connecting the first conductor 21 to the first conductor layer 31 of the first circuit board 30 can eliminate or weaken the influence of the human body impedance on the resonant frequency of the first antenna structure A1 and the loss of electromagnetic wave signal energy.

[0112] Among them, the first conductor 21 and the first conductor layer 31 of the first circuit board 30 can be directly short-circuited or connected through a small-impedance lumped or distributed device. Thus, the first conductor 21 and the first conductor layer 31 of the first circuit board 30 are equivalent to being short-circuited locally, thereby eliminating or weakening the electric field influence in the scenario where the wearable device 100 is partially recessed into the skin.

[0113] Among them, the partial electrical connection between the first conductor 21 and the first conductor layer 31 of the first circuit board 30 means that a partial area of the first conductor 21 is electrically connected to a partial area of the first conductor layer 31. In some embodiments, the partial areas of the first conductor 21 and the first conductor layer 31 may refer to the areas that may be blocked when the wearable device 100 is worn on the human body. For example, when the wearable device 100 is a smart watch, the partial areas of the first conductor 21 and the first conductor layer 31 may include the areas of the first conductor 21 and the first conductor layer 31 located at the 3 o'clock and 9 o'clock positions.

[0114] In some embodiments, as Figure 8 shown, the first conductor 21 is partially electrically connected to the second conductor 41. Among them, the first conductor 21 and the second conductor 41 can be directly short-circuited or connected through small-impedance lumped or distributed devices.

[0115] Similarly, locally electrically connecting the first conductor 21 and the second conductor 41 can also eliminate or weaken the influence of the human body blocking gap D on the electric field of the first antenna structure A1. Specifically, it can be analogously understood with reference to the explanation of the local electrical connection between the first conductor 21 and the first conductor layer 31 of the first circuit board 30 described above.

[0116] Among them, the partial electrical connection between the first conductor 21 and the second conductor 41 means that a partial area of the first conductor 21 is electrically connected to a partial area of the second conductor 41. In some embodiments, the partial areas of the first conductor 21 and the second conductor 41 may refer to the areas that may be partially recessed into the skin when the wearable device 100 is worn on the human body. For example, when the wearable device 100 is a smart watch, the partial areas of the first conductor 21 and 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.

[0117] In some embodiments, as Figure 9 shown, the wearable device 100 further includes a third feed V3, and the third feed V3 is disposed on the first circuit board 30. The first conductor 21 further includes a third feeding point F3, and the third feeding point F3 is spaced apart from the first feeding point F1; the third feed V3 is connected to the third feeding point F3 and is used to excite the first antenna structure A1 to generate a third electromagnetic wave signal through the third feeding point F3. Thus, the first antenna structure A3 can be excited by multiple feeds to generate corresponding electromagnetic wave signals respectively.

[0118] In which, the wearable device 100 may also include a plurality of feed sources (3 or more), which are all arranged on the first circuit board 30, and the first conductor 21 includes a plurality of feeding points corresponding to the plurality of feed sources, and the plurality of feed sources can excite the first antenna structure A1 to generate a plurality of electromagnetic wave signals through the corresponding plurality of feeding points, wherein the plurality of feeding points are arranged at intervals.

[0119] In some embodiments, Figure 4 As shown, the second feed source V2 is disposed on the first circuit board 30. Since various electronic components can be conveniently disposed on the first circuit board 30, it is relatively simple to dispose the second feed source V2 on the first circuit board 30.

[0120] In some embodiments, Figure 10 As shown, 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. Since the second feed source V2 is arranged on the first circuit board 30, when the second feed source V2 excites the second conductor 41 through the second feeding point F2, a corresponding electric field will be generated on the first circuit board 30, and this electric field will affect the first feed source V1 to excite 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, which can reduce this influence.

[0121] 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 through a small 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 in other ways, which are not limited here.

[0122] 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.

[0123] In some embodiments, Figure 11As shown, the wearable device 100 further includes a fourth feeder V4. The second conductor 41 further includes a fourth feeding point F4. The fourth feeding point F4 is spaced apart from the second feeding point F2. The fourth feeder V4 is disposed on the first circuit board 30 and is connected to the fourth feeding point F4. The fourth feeder V4 excites the second conductor 41 through the fourth feeding point F4 to generate a fourth electromagnetic wave signal. Thus, the first feeder V1, the second feeder V2, and the fourth feeder V4 can be disposed on the first circuit board 30. The first feeder V1 excites the first antenna structure A1 to generate a first electromagnetic wave signal through the first feeding point F1. The second feeder V2 and the fourth feeder V4 both excite the second conductor 41 to generate corresponding electromagnetic wave signals respectively.

[0124] Wherein, the wearable device 100 may further include a plurality of feeders (three or more). The plurality of feeders are all disposed on the first circuit board 30. The second conductor 41 includes a plurality of feeding points corresponding to the plurality of feeders. The plurality of feeders can excite the second conductor 41 through the corresponding plurality of feeding points to generate a plurality of electromagnetic wave signals. Among them, the plurality of feeding points are spaced apart from each other.

[0125] In some embodiments, such as Figure 12 and Figure 13 As shown, 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. The second feeder V2 is disposed on the first circuit board 30 (as Figure 12 shown) or the second circuit board 50 (as Figure 13 shown). Thus, when the wearable device 100 includes the first circuit board 30 and the second circuit board 50, and the first feeder V1 is disposed on the first circuit board 30, since the second feeder V2 can be disposed on the first circuit board 30 or the second circuit board 50, furthermore, when setting according to the frequency band required by the wearable device 100 and the layout requirements between various components, the second feeder 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 respectively.

[0126] In some embodiments, such as Figure 14As shown, the second feeder V2 is disposed on the first circuit board 30. The wearable device 100 further includes a fourth feeder V4. The second conductor 41 further includes a fourth feeding point F4. The fourth feeder V4 is disposed on the second circuit board 50 and is connected to the fourth feeding point F4. The fourth feeder V4 excites the second conductor 41 through the fourth feeding point F4 to generate a fourth electromagnetic wave signal. Thus, when set according to the size of the wearable device 100, the required frequency band, and the layout requirements among various components, the wearable device 100 can support the transceiver of multiple electromagnetic wave signals in the following manner: The first feeder V1 disposed on the first circuit board 30 can excite the first antenna structure A1 to generate a first electromagnetic wave signal. The second feeder V2 disposed on the first circuit board 30 can excite the second conductor 41 to generate a second electromagnetic signal. The fourth feeder V4 disposed on the second circuit board 50 can excite the second conductor 41 to generate a fourth electromagnetic wave signal.

[0127] In some embodiments, as Figure 15 shown, the wearable device 100 also includes a fourth feeder V4. The second conductor also includes a fourth feeding point F4. The fourth feeder V4 is connected to the fourth feeding point F4 and is used to excite the second conductor 41 through the fourth feeding point F4 to generate a fourth electromagnetic wave signal. Among them, different from Figure 14 the structure shown, the second feeder V2 and the fourth feeder V4 are both disposed on the second circuit board 50. Thus, when set according to the size of the wearable device 100, the required frequency band, and the layout requirements among various components, the wearable device 100 can also support the transceiver of multiple electromagnetic wave signals in the following manner: The first feeder V1 disposed on the first circuit board 30 can excite the first antenna structure A1 to generate a first electromagnetic wave signal. The second feeder V2 disposed on the second circuit board 50 can excite the second conductor 41 to generate a second electromagnetic signal. The fourth feeder V4 disposed on the second circuit board 50 can excite the second conductor 41 to generate a fourth electromagnetic wave signal.

[0128] Among them, the wearable device 100 may further include several other feeders (three or more), and the several other feeders are all disposed on the second circuit board 50. The second conductor 41 includes several other feeding points corresponding to and electrically connected to the several other feeders. The several other feeders can excite the second conductor 41 through the corresponding several feeding points to generate several other electromagnetic wave signals. Among them, the several other feeding points are spaced apart. Among them, the other feeders may be the same as or different from the fourth feeder V4, and the other electromagnetic wave signals may be the fourth electromagnetic wave signal or an electromagnetic wave signal different from the fourth electromagnetic wave signal.

[0129] In some embodiments, as Figure 16 shown, the wearable device 100 further includes a third conductor 60. The third conductor 60 is disposed between the first circuit board 30 and the second circuit board 50 and is 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 is spaced from the inner surface of the second conductor 41 with a spacing less than or equal to a preset distance. The third conductor 60 is at least used to isolate the electromagnetic wave signals generated by the excitation of the feeders disposed on the first circuit board 30 and the electromagnetic wave signals generated by the excitation of the feeders disposed on the second circuit board 50 from each other. Thus, the isolation degree of the electromagnetic wave signals respectively generated by the excitation of the feeders on the first circuit board 30 and the feeders on the second circuit board 50 can be improved.

[0130] Among them, 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, etc.

[0131] Among them, the preset distance may be a relatively small 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 with a spacing less than or equal to the preset distance, it can also play a good role in isolating the electromagnetic wave signals generated by the excitation of the feeders disposed on the first circuit board 30 and the electromagnetic wave signals generated by the excitation of the feeders disposed on the second circuit board 50 from each other.

[0132] In some embodiments, the battery E is disposed between the first circuit board 30 and the display screen 10, specifically, it may be disposed 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, and it may also be that the battery E is disposed between the third conductor 60 and the second circuit board 50, or disposed between the second circuit board 50 and the display screen 10, etc., or there may also be other setting methods, which are not limited here.

[0133] In some embodiments, such as Figure 17 shown, 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. The fifth feed source V5 is disposed on the second circuit board 50. The fifth feed source V5 excites the second antenna structure A2 through the fifth feed point F5 to generate a fifth electromagnetic wave signal. Wherein, the second antenna structure A2 is at least composed of the third conductor 60 and the second conductor layer 51 of the second circuit board 50. Thus, when setting according to the size of the wearable device 100, the required frequency band, and the layout requirements between various components, a solution can also 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, wherein the second antenna structure A2 is at least composed of the third conductor 60 and the second conductor layer 51 of the second circuit board 50.

[0134] Wherein, the third conductor 60 and the second circuit board 50 are also substantially parallel to the bottom case 20 (that is, it may not be completely parallel, and a certain inclination is allowed, such as an inclination within 10 degrees).

[0135] Wherein, in some embodiments, at least a portion of the third conductor 60 being parallel to the second circuit board 50 means that at least a portion of the surface with the largest area of the third conductor 60 is parallel to the surface with the largest area of the second circuit board 50.

[0136] In some embodiments, the second conductor layer 51 included in the second circuit board 50 is a certain layer structure in the second circuit board 50 and is parallel to the surface with the largest area of the second circuit board 50. Therefore, at least a portion of the third conductor 60 being parallel to the second circuit board 50 means that at least a portion of the third conductor 60 is parallel to the second conductor layer 51 included in the second circuit board 50.

[0137] Among them, similarly, when the wearable device 100 further includes a third conductor 60, and at least the third conductor 60 and the second conductor layer 51 of the second circuit board 50 form the second antenna structure A2, the wearable device 100 may further include a plurality of other feeders (two or more), and the plurality of other feeders are all disposed on the second circuit board 50. The third conductor 60 includes a plurality of feeding points corresponding to the plurality of other feeders. The plurality of other feeders can excite the second antenna structure A2 through the corresponding plurality of other feeding points to generate a plurality of electromagnetic wave signals. Among them, the plurality of other feeding points are spaced apart. Among them, the other feeder may be the same as or different from the fifth feeder 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.

[0138] Among them, as Figure 17 shown, the fifth feeding point F5 may also be located in the edge region of the third conductor 60, or, as Figure 18 shown, the fifth feeding point F5 may also be located in the middle region of the third conductor 60. The explanations of the middle region and the edge region can refer to the fact that the first feeding point F1 may be located in the middle region or the edge region of the first conductor 21 as described above, and will not be elaborated here.

[0139] Among them, as Figure 19 and Figure 20 shown, 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. Since the second feeder V2 or the fourth feeder V4 is disposed on the second circuit board 50, when the second feeder V2 or the fourth feeder V4 excites the second conductor 41 through the second feeding point F2, a corresponding electric field will be generated on the second circuit board 50, and this electric field will affect the fifth feeder V5 exciting the second antenna structure A2 through the fifth feeding point F5 to generate the fifth electromagnetic wave signal. Therefore, by electrically connecting the edge portion of the second conductor layer 51 of the second circuit board 50 close to the fifth feeding point F5 to the second conductor 41, this influence can be reduced.

[0140] Among them, the edge portion of the second conductor layer 51 of the second circuit board 50 close to the fifth feeding point F5 and the second conductor 41 can be connected by direct short-circuit connection or through small-impedance lumped or distributed devices. In other embodiments, the edge portion of the second conductor layer 51 of the second circuit board 50 close to the fifth feeding point F5 and the second conductor 41 can also be electrically connected in other ways, which are not limited here.

[0141] Further, 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 lines connecting the centers of the second circuit board 50, that is, the three lines have angles 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 coincident with the lines connecting the centers 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 coincident with the lines connecting the centers of the second circuit board 50 and the second feeding point F2, respectively. 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 to generate a second electromagnetic wave signal through the second feeding point F2, 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 to generate a fourth electromagnetic wave signal through the fourth feeding point F4.

[0142] In some embodiments, such as Figure 21 As shown, the positions of the first feeding point F1 and the second feeding point F2 projected on the first circuit board 30 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. Thus, the wearable device 100 can support WiFi signals, Bluetooth signals, GPS signals and cellular signals, and in the case where the positions of the first feeding point F1 and the second feeding point F2 projected on the first circuit board 30 are the same or different, both can be achieved by the first feed source V1 exciting the first antenna structure A1 through the first feeding point F1 and / or by the second feed source V2 exciting the second conductor 41 through the second feeding point F2.

[0143] 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.

[0144] In some embodiments, such as Figure 22As shown, the positions of the first feeding point F1, the second feeding point F2, and the third feeding point F3 projected onto the first circuit board 30 are different, and the lines connecting the positions of the first feeding point F1, the second feeding point F2, and the third feeding point F3 projected onto the first circuit board 30 to the center of the first circuit board 30 are located on different radial lines. 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.

[0145] Among them, the radial line refers to the line from the center of the first circuit board 30 to one edge point of the first circuit board 30. When the first circuit board 30 is circular, that is, when the shape of the projection of the first circuit board 30 in the direction perpendicular to the plane with the largest area of the first circuit board 30 is circular, the radial line can be understood as a radius line (not a diameter line). When the first circuit board 30 is of other shapes, that is, when the shape of the projection of the first circuit board 30 in the plane with the largest area of the first circuit board 30 is of other shapes, since the distances from various positions on the periphery of the first circuit board 30 to the center of the first circuit board 30 are generally different at this time, the radial line can be understood as radius lines with different lengths.

[0146] In some other embodiments, the first electromagnetic wave signal, the second electromagnetic wave signal, and the third electromagnetic wave signal can be other types of signals in addition to WiFi signals, Bluetooth signals, GPS signals, and cellular signals, and there is no limitation here.

[0147] In some embodiments, as Figure 23 shown, the positions of the first feeding point F1, the second feeding point F2, and the fifth feeding point F5 projected onto the first circuit board 30 are different, and the lines connecting the positions of the first feeding point F1, the second feeding point F2, and the fifth feeding point F5 projected onto the first circuit board 30 to the center of the first circuit board 30 are located on different radial lines. 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.

[0148] Among them, the radial line refers to the previous explanation. In some other embodiments, the first electromagnetic wave signal, the second electromagnetic wave signal, and the fifth electromagnetic wave signal can be other types of signals in addition to WiFi signals, Bluetooth signals, GPS signals, and cellular signals, and are not limited here.

[0149] In other embodiments, the positions of the first feeding point F1 and the fifth feeding point F5 projected on the first circuit board 30 may also be the same.

[0150] In some embodiments, the wearable device 100 is a smart watch and has a size of approximately 40mm×45mm×12mm. Under this overall size, Figure 4 the preferred sizes of the first conductor 21, the first circuit board 30, and the second conductor 41 in such a structure are determined, and the Figures 24 - 38 simulation test diagram obtained by testing under the preferred sizes is obtained. Among them, Figure 24 shows the echo loss curve S1, the system radiation efficiency curve Sr1, and the system total efficiency curve St1 when the first antenna structure A1 performs the transceiver of electromagnetic wave signals under the excitation of the first feed source V1. Among them, Figure 24 the abscissa in is frequency (unit: GHz), and the ordinate is amplitude (unit: dB). Among them, the reflection coefficient of the first electromagnetic wave signal generated by the input echo loss when the first feed source V1 excites the first antenna structure A1, and the frequency corresponding to the valley point of the input echo loss generally corresponds to the resonance frequency when the first feed source V1 excites the first antenna structure A1 to work.

[0151] From Figure 24 it can be seen that the input echo loss curve S1 has two valley points P1 and P2, and the frequencies corresponding to the two valley points P1 and P2 are 2.06GHz and 2.48GHz respectively. Among them, the frequency 2.06GHz corresponding to the valley point P1 is the first resonance frequency when the first feed source V1 excites the first antenna structure A1 to work, and the frequency 2.48GHz corresponding to the valley point P2 is the second resonance frequency when the first feed source V1 excites the first antenna structure A1 to work.

[0152] It can be seen that the input echo loss of the first antenna structure A1 is relatively low near the first resonance frequency of 2.06GHz and also relatively low near the second resonance frequency of 2.48GHz when performing the transceiver of electromagnetic wave signals under the excitation of the first feed source V1. Thus, the first antenna structure A1 can work well near the first resonance frequency and the second resonance frequency.

[0153] From Figure 24It can also be seen that the system radiation efficiency curve Sr1 of the first antenna structure A1 during the transmission and reception of electromagnetic wave signals under the excitation of the first feed V1 is relatively high in the frequency band from 2.06 GHz to 2.48 GHz, and the system total efficiency curve St1 of the first antenna structure A1 during the transmission and reception of electromagnetic wave signals under the excitation of the first feed V1 is also relatively high in the frequency band from 2.06 GHz to 2.48 GHz. Thus, the first antenna structure A1 can work well in the frequency band from 2.06 GHz to 2.48 GHz under the excitation of the first feed V1.

[0154] Figure 25 A cross-sectional schematic diagram of the electric field distribution when the first feed V1 excites the first antenna structure A1 to work at 2.05 GHz near the first resonance frequency of 2.06 GHz for the wearable device 100 is shown. Among them, Figure 25 The wearable device 100 is illustrated as a smartwatch, and it can be a cross-sectional schematic diagram cut along the 9 o'clock - 3 o'clock direction of the smartwatch. From Figure 25 it can be seen that at this time, the normal component of the electric field of the first antenna structure A1 is relatively large. Thus, the electric field generated by the first antenna structure A1 is not easily absorbed by the human body.

[0155] Figure 26 An antenna radiation pattern when the first feed V1 excites the first antenna structure A1 to work at the first resonance frequency of 2.06 GHz is shown. From Figure 26 it can be seen that when working at the first resonance frequency of 2.06 GHz, the radiation performance of the first antenna structure A1 in the vertical direction is good, and the antenna directivity is 6.556 dBi at this time. This shows that the first antenna structure A1 has a strong ability to radiate or receive signals in the vertical direction. Among them, the vertical direction can refer to the direction perpendicular to at least part of the first conductor 21 and the first circuit board 30.

[0156] Figure 27 A current distribution diagram when the first feed V1 excites the first antenna structure A1 to work at 2.05 GHz is shown. From Figure 27 it can be seen that the current flows along the long side direction on the first conductor 21. Thus, it can be obtained that the resonance frequency of the first antenna structure A1 is determined at least based on the long side length of the first conductor 21.

[0157] Figure 28 A cross-sectional schematic diagram of the electric field distribution when the first feed V1 excites the first antenna structure A1 to work at the second resonance frequency of 2.5 GHz is shown. Among them, Figure 28The wearable device 100 is illustrated as a smartwatch, and it can be a schematic cross-sectional view taken along the 9 o'clock - 3 o'clock direction of the smartwatch. At this time, the normal component of the electric field of the first antenna structure A1 is relatively large. Thus, the electric field generated by the first antenna structure A1 is not easily absorbed by the human body.

[0158] Figure 29 It is the antenna radiation pattern when the first feed V1 excites the first antenna structure A1 to operate at the second resonance frequency of 2.5 GHz. Figure 25 It can be seen that the radiation of the first antenna structure A1 in the vertical direction is better, and at this time the antenna directivity is 6.791 dBi. This indicates that the first antenna structure A1 has a stronger ability to radiate or receive signals in the vertical direction. Among them, the vertical direction can refer to the direction perpendicular to at least part of the first conductor 21 and the first circuit board 30.

[0159] Figure 30 It is the current distribution diagram when the first feed V1 excites the first antenna structure A1 to operate at the second resonance frequency of 2.5 GHz. Figure 30 It can be seen that the current flows along the short side direction on the first conductor 21. Thus, it can be obtained that the resonance frequency of the first antenna structure A1 is determined at least based on the short side length of the first conductor 21.

[0160] Figure 31 It shows the return loss curve S2, the system radiation efficiency curve Sr2, and the system total efficiency curve St2 of the second feed V2. Figure 31 It can be seen that the input return loss curve S2 has a valley point P3, and the frequency corresponding to the valley point P3 is 1.43 GHz. Among them, the frequency 1.43 GHz corresponding to the valley point P3 is the third resonance frequency when the second feed V2 excites the second conductor 41 to work.

[0161] Thus, it can be seen that the input return loss of the electromagnetic wave signal generated by the second conductor 41 under the excitation of the second feed V2 is relatively low near the third resonance frequency of 1.43 GHz. Thus, the second conductor 41 can work well near the third resonance frequency.

[0162] Figure 32 It is a schematic diagram of the first return loss curve and isolation curve of the wearable device 100. Among them, Figure 32 It can be a schematic diagram of the return loss curve and isolation curve obtained by simulating and testing the wearable device 100 including the first antenna structure A1 and the second conductor 41 in any of the previous embodiments when operating in the 2.5 GHz band and the 1.43 GHz band.

[0163] Specifically, when the wearable device 100 operates in the 2.5 GHz band, the first feeder V1 of the wearable device 100 can excite the first antenna structure A1 to operate in the 2.5 GHz band. When the wearable device 100 operates in the 1.43 GHz band, the second feeder V2 of the wearable device 100 can excite the second conductor 41 to operate in the 1.43 GHz band.

[0164] Among them, Figure 32 Figure shows the return loss curve S1 of the wearable device 100 operating in the 2.5 GHz band, the return loss curve S2 of the wearable device 100 operating in the 1.43 GHz band, and the isolation curve S20 reflecting the isolation between the 2.5 GHz band and the 1.43 GHz band.

[0165] Among them, the lower the absolute value of the isolation corresponding to the isolation curve S20, the worse the isolation. Conversely, the better the isolation. From Figure 32 it can be seen that the isolation value corresponding to 2.5 GHz is less than -24 dB, and the isolation value corresponding to 1.43 GHz is approximately -18 dB. Therefore, it can be seen that the isolation between the 2.5 GHz band and the 1.43 GHz band is very good, and the interference between them when operating simultaneously is small.

[0166] Figure 33 Figure is a simulation diagram of the system radiation efficiency curve Sr1 of the first feeder V1 and the system radiation efficiency curve Sr2 of the second feeder V2 when the wearable device 100 is worn on the arm. From Figure 33 it can be seen that the system radiation efficiency excited by the first feeder V1 is higher than that of the second feeder V2 in the entire frequency band.

[0167] According to the previous analysis, the first antenna structure A1 can operate well near the frequency bands of 2.07 GHz and 2.48 GHz under the excitation of the first feeder V1, close to WiFi signals, Bluetooth signals, and GPS signals. The second conductor 41 can operate well near the 1.43 GHz frequency under the excitation of the second feeder V2, close to some cellular signals. Therefore, in some embodiments, when the wearable device 100 includes Figure 9 a structure such as Figure 34As shown, the wearable device 100 further 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. The first matching circuit 103 is configured 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 GPS L1 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 configured 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 the 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 configured 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).

[0168] Wherein, the first matching circuit 103 and the third matching circuit 105 can be composed of a capacitor and / or an inductor and / or a resistor.

[0169] As Figure 34As shown, 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 feeder 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. 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 turned off. 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 an intermediate-frequency band, the second switch unit SW2 is turned on, and the first switch unit SW1 and the third switch unit SW3 are turned off. 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 turned off.

[0170] Among them, 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 each composed of a capacitor and / or an inductor and / or a resistor.

[0171] In some embodiments, as Figure 22 shown, the first feeding point F1 is located at the 7 o'clock direction of the wearable device 100, the second feeding point F2 is located at the 10 o'clock direction of the wearable device 100, and the third feeding point F3 is located at the 2 o'clock direction of the wearable device 100. At this time, the test results are obtained Figures 35 - 45 .

[0172] Figure 35 are simulation diagrams of the return loss curve S3, the system radiation efficiency curve Sr3, and the system total efficiency curve St3 of the signal generated by the first feeder V1 exciting the first antenna structure A1 through the first matching circuit. From Figure 35 it can be seen that the input return loss curve S3 has a valley point P4, and the frequency corresponding to the valley point P4 is 1.575 GHz, which belongs to the L1 band of GPS. Therefore, the first feeder V1 can excite the first antenna structure A1 through the first matching circuit to generate a GPS signal.

[0173] Figure 36 The antenna radiation pattern of the GPS signal generated by exciting the first antenna structure A1 by the first feed V1 through the first matching circuit. From Figure 36 It can be seen that at this time, the radiation performance of the first antenna structure A1 in the vertical direction is good, and the antenna directivity is 6.053 dBi at this time. This indicates that the first antenna structure A1 has a strong ability to radiate or receive signals in the vertical direction.

[0174] Figure 37 The simulation diagrams of the return loss curve S4, the system radiation efficiency curve Sr4, and the system total efficiency curve St4 of the signal generated by exciting the first antenna structure A1 by the third feed V3 through the third matching circuit. From Figure 37 It can be seen that the input return loss curve S4 has two valley points P5 and P6. The frequency corresponding to the valley point P5 is 2.15 GHz, and the frequency corresponding to the valley point P6 is 2.45 GHz.

[0175] The system radiation efficiency curve Sr4 of the signal generated by exciting the first antenna structure A1 by the third feed V3 through the third matching circuit is relatively high in the frequency band from 2.15 GHz to 2.45 GHz, and the system total efficiency curve St4 of the electromagnetic wave signal generated by the first antenna structure A1 under the excitation of the third feed V3 through the third matching circuit is also relatively high in the frequency band of 2.45 GHz. Thus, the first antenna structure A1 can work well in the frequency band near 2.45 GHz under the excitation of the third feed V3 through the third matching circuit, that is, it can work well in the Bluetooth frequency band and the Wifi frequency band (2.4 - 2.483 GHz).

[0176] Figure 38 The antenna radiation pattern of the signal generated by exciting the first antenna structure A1 by the third feed V3 through the third matching circuit. From Figure 38 It can be seen that at this time, the radiation performance of the first antenna structure A1 in the vertical direction is good, and it is weak in other directions, and the antenna directivity is 5.883 dBi at this time. This indicates that the first antenna structure A1 has a strong ability to radiate or receive signals in the vertical direction.

[0177] Figure 39 The simulation diagrams of the return loss curves S5, S6, and the efficiency curves Sr5, Sr6 of the signal generated by exciting the second conductor 41 by the second feed V2 through the second matching circuit. From Figure 39 It can be seen from this that cellular signals in the low frequency (B5 band and B8 band) can be excited at this time.

[0178] Figure 40Simulation diagrams of the return loss curves S7, S8, and efficiency curves Sr7, Sr8 of the signals generated by exciting the second conductor 41 by the second feed V2 through the second matching circuit. It can be seen from Figure 40 that at this time, cellular signals in the intermediate frequency (B1 band and B3 band) can be excited and generated.

[0179] Figure 41 Simulation diagrams of the return loss curve S9 and efficiency curve Sr9 of the signals generated by exciting the second conductor 41 by the second feed V2 through the second matching circuit. It can be seen from Figure 41 that at this time, cellular signals in the high frequency (B40 band and B41 band) can be excited and generated.

[0180] Figure 42 Schematic diagrams of the second return loss curve and isolation degree curve of the wearable device 100. Among them, Figure 42 it can be a schematic diagram of the return loss curve and isolation degree curve obtained by taking the wearable device 100 that simultaneously includes the first antenna structure A1 and the second conductor 41 in any of the foregoing embodiments and operating in the GPS L1 band and the B3 band as an example for simulation testing.

[0181] Specifically, the wearable device 100 operating in the GPS L1 band can be that the first feed V1 of the wearable device 100 excites the first antenna structure A1 through the first matching circuit to operate in the GPS L1 band, and the wearable device 100 operating in the B3 band can be that the second feed V2 of the wearable device 100 excites the second conductor 41 through the second matching circuit to operate in the B3 band.

[0182] Among them, Figure 42 it shows the return loss curve S10 of the wearable device 100 operating in the GPS L1 band, the return loss curve S11 of the wearable device 100 operating in the B3 band, and the isolation degree curve S21 reflecting the isolation between the GPS L1 band and the B3 band.

[0183] Among them, the lower the absolute value of the isolation degree corresponding to the isolation degree curve S21, the worse the isolation degree, and vice versa, the better the isolation degree. It can be seen from Figure 42 that at the resonant frequency of 1.75 GHz in the B3 band, the corresponding isolation degree value is approximately -16 dB, and at the resonant frequency of 1.575 GHz in the GPS L1 band, the corresponding isolation degree value is approximately -20 dB. Therefore, it can be seen that the isolation between the GPS L1 band and the B3 band is very good, and the interference between them when operating simultaneously is small.

[0184] Figure 43It is a schematic diagram of the third echo loss curve and isolation curve for the wearable device 100. Specifically, Figure 43 It is a simulation diagram of the echo loss curve S12 of the third feed V3 exciting the first antenna structure A1 to generate a 2.4 GHz Bluetooth signal through the third matching circuit, the echo loss curve S13 of the second feed V2 exciting the second conductor 41 to generate a cellular signal in the B41 frequency band through the second matching circuit, and the isolation curve S23. It can be seen from Figure 43 this that when the third feed V3 excites the first antenna structure A1 to operate in the 2.4 GHz frequency band through the third matching circuit, the isolation is about -18 dB. When the second feed V2 excites the second conductor 41 to operate in the B41 frequency band (2.496 GHz - 2.69 GHz) through the second matching circuit, the isolation is about -13 dB to -10 dB. Therefore, the isolation between the 2.4 GHz frequency band and the B41 frequency band is good; thus, the two can operate simultaneously.

[0185] Figure 44 It is a simulation diagram of the echo loss curve when the first feed V1 excites the first antenna structure A1 to generate a GPS signal through the first matching circuit when the second feed V2 switches different frequency band cellular signals through the second matching circuit. It can be seen from Figure 44 this that when the cellular switches different frequency bands, the impact on the GPS signal is small.

[0186] Figure 45 It is a simulation diagram of the echo loss curve when the third feed V3 excites the first antenna structure A1 to generate a Bluetooth signal through the third matching circuit when the second feed V2 switches different frequency band cellular signals through the second matching circuit. It can be seen from Figure 44 this that when the cellular switches different frequency bands, the impact on the Bluetooth signal is small.

[0187] 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 good effects.

[0188] In other embodiments, the positions of the first feeding point F1, the second feeding point F2, and the third feeding point F3 can also be other positions, which are not limited here. The first feed V1 can excite the first antenna structure A1 to generate a GPS signal through the first matching circuit.

[0189] 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. Here, it is implied that when replacing, the first feeding point F1 and the first feeding source V1 are regarded as an integral body, the third feeding point F3 and the third feeding source V3 are regarded as an integral body, and the fifth feeding point F5 and the fifth feeding source V5 are regarded as an integral body for replacement.

[0190] Similarly, the second feeding point F2 and the fourth feeding point F4 can also be replaced with each other. Similarly, here it is also implied that the second feeding point F2 and the second feeding source V2 are regarded as an integral body, and the fourth feeding point F4 and the fourth feeding source V4 are regarded as an integral body for replacement.

[0191] In the description of this application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication inside two components; it can be a communication connection; it can be an electrical connection. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0192] 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 orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application.

[0193] In the above embodiments, the descriptions of each embodiment have their own emphases. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0194] Referring to "embodiment" in this article means that the specific features, structures, or characteristics described in connection with the embodiment can be included in at least one embodiment of the present invention. The display of this phrase at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0195] The above is the implementation manner of the embodiments of this application. It should be noted that for those of ordinary skill in the technical field of this application, without departing from the principle of the embodiments of this application, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of this application.

Claims

1. A wearable device, characterized in that, The wearable device includes: A display screen; A bottom case, including a first conductor, and the first conductor includes a first feeding point; A first circuit board located between the first conductor and the display screen, and the first circuit board includes a first conductor layer; A first feed source disposed on the first circuit board, and the first feed source is electrically connected to the first feeding point; The first conductor and the first circuit board are spaced apart; the first feed source is configured to excite a first antenna structure through the first feeding point to generate a first electromagnetic wave signal, 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, wherein At least a part of the first conductor is parallel to the first conductor layer of the first circuit board.

3. The wearable device according to claim 1, wherein The first antenna structure is a cavity antenna structure or a patch antenna structure.

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

5. The wearable device according to claim 1, wherein The wearable device further includes: a second feed source and a frame, and the frame includes a second conductor; The second conductor includes a second feeding point, the frame is disposed between the display screen and the bottom case, 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 configured 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 radiate out from the wearable device.

7. The wearable device according to claim 6, wherein, The first conductor is locally electrically connected to the first conductor layer of the first circuit board.

8. The wearable device according to claim 6, wherein The first conductor is locally electrically connected to the second conductor.

9. The wearable device according to claim 1, wherein The bottom case further includes a bottom case body; The first conductor is a metal sheet disposed on the bottom case body; or, The first conductor is a metal layer formed on the inner surface and / or outer surface of the bottom case body by a manufacturing process.

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

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

12. The wearable device according to claim 5, wherein, The second feed source is disposed on the first circuit board.

13. The wearable device according to claim 12, wherein The edge portion of the first conductor layer of the first circuit board near the first feeding point is electrically connected to the second conductor.

14. The wearable device according to claim 12, wherein The wearable device further includes a fourth feed source, the second conductor further 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 is connected to the fourth feeding point, and the fourth feed source excites the second conductor through the fourth feeding point to generate a fourth electromagnetic wave signal.

15. The wearable device according to claim 5, wherein The wearable device further includes a second circuit board; The second circuit board is disposed 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, wherein, The second feed is disposed on the first circuit board. The wearable device further includes a fourth feed. The second conductor further includes a fourth feed point. The fourth feed is disposed on the second circuit board and connected to the fourth feed point. The fourth feed excites the second conductor to generate a fourth electromagnetic wave signal through the fourth feed point.

17. The wearable device according to claim 15, wherein The wearable device further includes a fourth feed. The second conductor further includes a fourth feed point. The fourth feed is connected to the fourth feed point and is configured to excite the second conductor to generate a fourth electromagnetic wave signal through the fourth feed point. Among them, both the second feed and the fourth feed are disposed on the second circuit board.

18. The wearable device according to any one of claims 15-17, characterized in that, The wearable device further includes a third conductor. The third conductor is disposed 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 from the inner surface of the second conductor with a spacing less than or equal to a preset distance. The third conductor is at least configured to isolate the electromagnetic wave signals excited by the feeds disposed on the first circuit board and the electromagnetic wave signals excited by the feeds disposed on the second circuit board from each other.

19. The wearable device according to claim 18, wherein At least a part 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 feed point. The wearable device further includes a fifth feed. The fifth feed is disposed on the second circuit board. The fifth feed excites the second antenna structure to generate a fifth electromagnetic wave signal through the fifth feed point. Among them, the second antenna structure is at least composed of the third conductor and the second conductor layer of the second circuit board.

20. The wearable device according to claim 5, wherein The positions of the first feed point and the second feed point projected onto 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, wherein The positions of the first feed point, the second feed point, and the third feed point projected onto the first circuit board are different, and the lines connecting the positions of the first feed point, the second feed point, and the third feed point projected onto the first circuit board to the center of the first circuit board are located on different radial lines. 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, wherein The positions of the first feeding point, the second feeding point, and the fifth feeding point projected onto the first circuit board are different, and the lines connecting the positions of the first feeding point, the second feeding point, and the fifth feeding point projected onto the first circuit board to the center of the first circuit board are located on different radial lines. 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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