Wristwatch

Abstract

The present application discloses a watch, belonging to the technical field of electronic products. The watch includes a housing and a circuit board. The housing is disposed around the circuit board. The circuit board includes a first terminal and a second terminal. The circuit board has a first operating mode and a second operating mode. The watch includes a positioning antenna. The housing is a non-conductive housing. The positioning antenna includes a first radiation branch and a second radiation branch disposed on the housing. The first radiation branch is coupled to the second radiation branch. When the circuit board is in the first operating mode, the first terminal is connected to the first radiation branch, the second terminal is connected to the second radiation branch, and the second terminal is grounded through a first matching circuit. Alternatively, the housing is a conductive housing. When the circuit board is in the second operating mode, the first terminal is connected to the conductive housing, the second terminal is the feeding terminal of a Long Term Evolution (LTE) antenna, and the second terminal is connected to the housing. A third terminal of the circuit board is connected to the housing, and the third terminal is grounded through a second matching circuit.

Description

Technical Field

[0001] The present application relates to the technical field of electronic products, and in particular to a watch. Background Art

[0002] As a new type of electronic device, smart watches are becoming a necessity in people's lives with their functions constantly upgraded and enriched. The continuous development of sensors, wireless communications and positioning technologies has brought more application scenarios to smart watches. The realization of these high-end functions is inseparable from the support of stable, efficient and anti-interference antennas. However, due to the variety of existing watch styles, different antenna forms are usually required for different watch styles, and different antenna forms usually have different antenna effects, which leads to the problem of poor antenna effects in some watches. Summary of the invention

[0003] The present application provides a watch, which can enable watches with a conductive frame and a non-conductive frame to have good antenna effects.

[0004] In the first aspect, an embodiment of the present application provides a watch, comprising a frame and a circuit board, wherein the frame is arranged around the circuit board, the circuit board comprises a first terminal and a second terminal, the circuit board has a first working mode and a second working mode, and the watch comprises a positioning antenna;

[0005] The frame is a non-conductive frame, the positioning antenna includes a first radiation branch and a second radiation branch arranged in the frame, the first radiation branch is coupled with the second radiation branch, the circuit board is in the first working mode, the first terminal is the feeding terminal of the positioning antenna, and the first terminal is connected to the first radiation branch, the second terminal is connected to the second radiation branch, and the second terminal is grounded through a first matching circuit, and the polarization mode of the positioning antenna is circular polarization; or,

[0006] The frame is a conductive frame, the circuit board is in the second working mode, the first terminal is a feeding terminal of the positioning antenna, and the first terminal is connected to the conductive frame, the second terminal is a long-term evolution LTE feeding terminal, and the second terminal is connected to the frame, the third terminal of the circuit board is connected to the frame, and the third terminal is grounded through a second matching circuit, and the polarization mode of the positioning antenna is circular polarization.

[0007] In the embodiments of the present application, since the circuit board has a first working mode and a second working mode, when the circuit board is in the first working mode, it can be applied to a watch with a non-conductive housing, and the polarization mode of the positioning antenna in the watch is circular polarization. Correspondingly, when the circuit board is in the second working mode, it can be applied to a watch with a conductive housing, and the polarization mode of the positioning antenna in the watch is circular polarization. In this way, the circuit board can be compatible with watches with conductive and non-conductive housings, and the polarization modes of watches with conductive and non-conductive housings are both circular polarization, so that watches with conductive and non-conductive housings both have good antenna effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 is one of the schematic diagrams of the internal structure of the watch in the embodiments of the present application;

[0009] Figure 2 is another schematic diagram of the internal structure of the watch in the embodiments of the present application;

[0010] Figure 3 is yet another schematic diagram of the internal structure of the watch in the embodiments of the present application;

[0011] Figure 4 is still another schematic diagram of the internal structure of the watch in the embodiments of the present application;

[0012] Figure 5 is one of the schematic diagrams of the internal structure of the watch in the embodiments of the present application;

[0013] Figure 6 is one of the schematic diagrams of the circuit board structure in the embodiments of the present application;

[0014] Figure 7 is another schematic diagram of the circuit board structure in the embodiments of the present application;

[0015] Figure 8 is the schematic diagram of the structure of the first radiation branch in the embodiments of the present application;

[0016] Figure 9 is for the present application Figure 1 Smith Chart of the GPS antenna for simulating the embodiment shown;

[0017] Figure 10 is for the present application Figure 1 Schematic diagram of the current distribution of the GPS antenna for simulating the embodiment shown;

[0018] Figure 11 is for the present application Figure 1 Schematic diagram of the efficiency of the GPS antenna for simulating the embodiment shown;

[0019] Figures 12 - 14 is for the present applicationFigure 1 Axial ratio schematic diagram of GPS antenna simulation for the illustrated embodiment;

[0020] Figures 15 - 16 This application is for Figure 1 Comparison schematic diagram of left - hand gain component and right - hand gain component of GPS antenna for the illustrated embodiment;

[0021] Figures 17 - 19 This application is for Figure 3 S - parameter schematic diagram of GPS antenna / LTE antenna / BT antenna obtained by simulating the illustrated embodiment;

[0022] Figures 20 - 21 This application is for Figure 3 Axial ratio schematic diagram of GPS antenna obtained by simulating the illustrated embodiment;

[0023] Figures 22 - 23 This application is for Figure 3 Comparison schematic diagram of left - hand gain component and right - hand gain component of GPS antenna obtained by simulating the illustrated embodiment;

[0024] Figure 24 This is for Figure 3 Current distribution schematic diagram of GPS frequency band obtained by simulating the illustrated embodiment;

[0025] Figures 25 - 32 Schematic diagram of relevant simulation parameters obtained by simulating the GPS antenna of this embodiment. Specific implementation mode

[0026] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope protected by the present application.

[0027] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are usually of the same category, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally represents an "or" relationship between the associated objects before and after.

[0028] The following will combine the accompanying drawings to provide a detailed description of a watch and an electronic device provided by an embodiment of the present application through specific embodiments and their application scenarios.

[0029] Please refer to Figures 1 - 5 , Figures 1 - 5 which is a schematic structural diagram of a watch provided by an embodiment of the present application. The watch includes a housing 100 and a circuit board 200. The housing 100 is disposed around the circuit board 200. The circuit board 200 includes a first terminal 210 and a second terminal 220. The circuit board 200 has a first operating mode and a second operating mode. The watch includes a positioning antenna 800;

[0030] The housing 100 is a non-conductive housing. The positioning antenna 800 includes a first radiation branch 300 and a second radiation branch 400 disposed on the housing 100. The first radiation branch 300 is coupled to the second radiation branch 400. When the circuit board 200 is in the first operating mode, the first terminal 210 is the feeding terminal of the positioning antenna 800, and the first terminal 210 is connected to the first radiation branch 300. The second terminal 220 is connected to the second radiation branch 400, and the second terminal 220 is grounded through a first matching circuit. The polarization mode of the positioning antenna 800 is circular polarization; or,

[0031] The housing 100 is a conductive housing. When the circuit board 200 is in the second operating mode, the first terminal 210 forms the feeding terminal of the positioning antenna 800, and the first terminal 210 is connected to the conductive housing. The second terminal 220 is the feeding terminal of Long Term Evolution (LTE), and the second terminal 220 is connected to the housing 100. The third terminal 230 of the circuit board 200 is connected to the housing 100, and the third terminal 230 is grounded through a second matching circuit. The polarization mode of the positioning antenna 800 is circular polarization.

[0032] The above LTE feeding terminal can be used as the feeding terminal of various LTE antennas. Among them, the LTE antenna can implement the cellular function of the watch.

[0033] Specifically, the housing 100 can be a non-conductive housing or a conductive housing. When the housing 100 is a non-conductive housing, the first matching circuit is used to adjust the operating mode of the positioning antenna 800 during the process of feeding a feeding signal from the first terminal 210 to the first radiating stub 300, so that the polarization mode of the positioning antenna 800 is circular polarization. Correspondingly, when the housing 100 is a conductive housing, the second matching circuit is used to adjust the operating mode of the positioning antenna 800 during the process of feeding a feeding signal from the first terminal 210 to the housing 100, so that the polarization mode of the positioning antenna 800 is circular polarization.

[0034] The above-mentioned first terminal 210, second terminal 220 and third terminal 230 can be terminals located near the edge of the circuit board 200. Please refer to Figure 1 , in some embodiments of the present application, the first terminal 210, second terminal 220 and third terminal 230 can also be located on the edge of the circuit board 200.

[0035] The above-mentioned first radiating stub 300 and second radiating stub 400 are fixed to the housing 100, and the arrangements of the first radiating stub 300 and the second radiating stub 400 can be located inside the housing 100, or the first radiating stub 300 and the second radiating stub 400 can also be located on the surface of the housing 100.

[0036] Among them, when the above-mentioned housing 100 is a non-conductive housing, the watch can be various non-metal watches. For example, it can be a plastic Bluetooth watch, various smartwatches, etc. When the above-mentioned housing 100 is a conductive housing, the watch can be various metal watches. For example, it can be a metal mid-frame cellular watch, etc.

[0037] The above-mentioned first radiating stub 300 and second radiating stub 400 can be conductive radiators capable of radiating signals. Among them, the first radiating stub 300 and the second radiating stub 400 can be embedded in the inner wall of the non-conductive housing, and one side of the first radiating stub 300 and the second radiating stub 400 located on the inner wall of the non-conductive housing is exposed to the outside, so that the corresponding terminals in the circuit board 200 can be connected to the first radiating stub 300 and the second radiating stub 400.

[0038] The above-mentioned positioning antenna 800 can be various antennas for position positioning. For example, the positioning antenna 800 can be a Global Positioning System (GPS) antenna. Hereinafter, taking the positioning antenna 800 as a GPS antenna as an example, the embodiments of the present application will be further explained.

[0039] Specifically, the housing 100 is a non-conductive housing. During the process of the first terminal 210 feeding a feed signal to the first radiating stub 300, a radiation pattern is formed in the first radiating stub 300, and the feed signal can be coupled to the second radiating stub 400, thereby forming another radiation pattern. The above-mentioned first matching circuit can adjust the phase difference between the two radiation patterns so that the polarization mode of the positioning antenna 800 is circular polarization, thereby improving the antenna effect. Among them, the first matching circuit can be composed of at least one of a capacitor and an inductor. In this way, by adjusting the capacitance value and / or the inductance value, the phase difference between the two radiation patterns can be adjusted. Please refer to Figure 1 The circuit board 200 may further include a grounding terminal 250 of the positioning antenna 800. The grounding terminal 250 of the positioning antenna 800 is located on one side of the first terminal 210, and the grounding terminal 250 of the positioning antenna 800 is electrically connected to the first radiating stub 300 to realize grounding of the positioning antenna 800.

[0040] Correspondingly, the housing 100 is a conductive housing. The conductive housing serves as a radiator for both the positioning antenna 800 and the LTE antenna at the same time. At this time, the watch can be a metal mid-frame cellular watch. During the process of the first terminal 210 feeding a feed signal to the first radiating stub 300, the positioning antenna 800 can generate two different operating modes in the housing 100. The above-mentioned second matching circuit can adjust the phase difference between the two radiation patterns in the housing 100 so that the polarization mode of the positioning antenna 800 is circular polarization, thereby improving the antenna effect. Among them, the second matching circuit can be composed of at least one of a capacitor and an inductor. In this way, by adjusting the capacitance value and / or the inductance value, the phase difference between the two radiation patterns can be adjusted. Among them, the above-mentioned positioning antenna 800 and LTE antenna can be grounded through the third terminal 230 respectively.

[0041] In addition, the housing 100 is a conductive housing. Since the housing 100 forms a radiator for both the positioning antenna 800 and the LTE antenna at the same time, in order to improve the isolation between the LTE antenna and the positioning antenna 800, the first terminal 210 can be connected to the feed source of the positioning antenna 800 through a matching circuit, and the second terminal 220 can be connected to the feed source of the LTE antenna through another matching circuit. In this way, the isolation between the positioning antenna 800 and the LTE antenna can be adjusted through the matching circuits connected to the two terminals to achieve relative isolation between the positioning antenna 800 and the LTE antenna.

[0042] It can be understood that when the circuit board 200 is in the first working mode, the first terminal 210 is electrically connected to the feeder of the positioning antenna 800, and the second terminal 220 is grounded through the first matching circuit. When the circuit board 200 is in the second working mode, the first terminal 210 is electrically connected to the feeder of the positioning antenna 800, the second terminal 220 is electrically connected to the feeder of the LTE antenna, and the third terminal 230 is grounded. That is, in different working modes of the circuit board 200, the circuits in the circuit board 200 connected to the first terminal 210, the second terminal 220, and the third terminal 230 may be different. Therefore, a switching element can be provided in the circuit board 200, so that the circuits connected to each terminal can be switched through the switching element. In addition, during the process of circuit printing, corresponding circuits can be printed according to the application scenario of the circuit board 200, and the application scenario may include: being applied to a watch with a non-conductive housing and being applied to a watch with a conductive housing.

[0043] In the related art, due to different antenna forms of metal watches and non-metal watches, the Bill of Materials (BOM) tables of metal watches and non-metal watches are different during the production process. However, the circuit board 200 provided in the embodiments of the present application can be compatible with metal watches and non-metal watches, so that the labor and material costs can be reduced.

[0044] In some embodiments of the present application, the GPS antenna can be an Inverted-F Antenna (IFA) antenna, a Monopole antenna. If it is an IFA antenna, there is a grounding position beside the GPS feed. This antenna can be a Flexible Printed Circuit (FPC) 200, an antenna manufactured by Laser-Direct-structuring (LDS), or an injection-molded steel sheet, and a parasitic grounding position is formed at the second terminal 220. Figure 9 This is the Smith Chart of the GPS antenna of the present application. Figure 10 This is the current distribution of the GPS antenna of the present application. It can be seen that there are currents on both the GPS first radiation branch 300 and the second radiation branch 400, that is, two modes are generated. These two modes are perpendicular to each other and the phase difference is 90 degrees, so circular polarization can be generated. Figure 11 This is for the present application Figure 1 The efficiency of the GPS antenna for simulating the shown embodiment. Figures 12 - 14 This is for the present application Figure 1 The axial ratio of the GPS antenna simulation for the shown embodiment. It can be seen that within the range of plus or minus 30 degrees in the normal direction of the watch dial, the axial ratio is less than 7 dB (the smaller the axial ratio, the better). Figures 15 - 16 This is for the present applicationFigure 1 The left - hand gain component and the right - hand gain component of the GPS antenna are compared in the illustrated embodiment, and it can be seen that the GPS antenna of the present application is a right - hand circularly polarized antenna.

[0045] Figures 17 - 19 For the present application Figure 3 The S - parameters of the GPS antenna / LTE antenna / BT antenna obtained by simulating the illustrated embodiment. Figures 20 - 21 For the present application Figure 3 The axial ratio of the GPS antenna obtained by simulating the illustrated embodiment. It can be seen that within the range of plus or minus 30 degrees in the normal direction of the watch dial, the axial ratio is less than 9 dB. Figures 22 - 23 For the present application Figure 3 The comparison between the left - hand gain component and the right - hand gain component of the GPS antenna obtained by simulating the illustrated embodiment. It can be seen that the GPS antenna of the metal middle - frame honeycomb watch in the first embodiment of the present application is right - hand circularly polarized. In particular, by loading an inductor at the third terminal 230, the axial ratio characteristic can be improved, the circular polarization effect of the GPS antenna can be enhanced, the positioning accuracy of the GPS can be improved, and the multipath interference can be reduced. Figure 24 For Figure 3 The schematic diagram of the current distribution in the GPS frequency band obtained by simulating the illustrated embodiment.

[0046] In this embodiment, since the circuit board 200 has a first working mode and a second working mode, when the circuit board 200 is in the first working mode, it can be applied to a watch with a non - conductive housing, and the polarization mode of the positioning antenna 800 in the watch is circular polarization. Correspondingly, when the circuit board 200 is in the second working mode, it can be applied to a watch with a conductive housing, and the polarization mode of the positioning antenna 800 in the watch is circular polarization. In this way, the circuit board 200 can be compatible with watches with conductive and non - conductive housings, and the polarization modes of the positioning antennas 800 in the watches with conductive and non - conductive housings are both circular polarization, so that the watches with conductive and non - conductive housings both have good antenna effects.

[0047] Optionally, the housing 100 is the non - conductive housing. During the process of feeding a feeding signal from the first terminal 210 to the first radiation branch 300, the first radiation branch 300 operates in a first radiation mode, and the second radiation branch 400 operates in a second radiation mode. The phase difference between the first radiation mode and the second radiation mode is 90°, so that the polarization mode of the positioning antenna 800 is circular polarization; or,

[0048] The housing 100 is a conductive housing. During the process of the first terminal 210 feeding a feeding signal to the first radiating stub 300, the positioning antenna 800 generates a third radiation mode and a fourth radiation mode in the housing 100, and the phase difference between the third radiation mode and the fourth radiation mode is 90°, so that the polarization mode of the positioning antenna 800 is circular polarization.

[0049] Specifically, the first matching circuit is used to adjust the phase difference between the first radiation mode and the second radiation mode to 90°, so that the polarization mode of the positioning antenna 800 is circular polarization. Correspondingly, the second matching circuit is used to adjust the phase difference between the third radiation mode and the fourth radiation mode to 90°, so that the polarization mode of the positioning antenna 800 is circular polarization.

[0050] In this embodiment, the housing 100 is the non-conductive housing, and the first matching circuit adjusts the phase difference between the two radiation modes of the positioning antenna 800 to 90°. The housing 100 is a conductive housing, and the second matching circuit adjusts the phase difference between the two radiation modes of the positioning antenna 800 to 90°. In this way, it can be realized that the polarization modes of the positioning antenna 800 in the watch with a non-conductive housing and the watch with a conductive housing are both circular polarization, thereby improving the antenna effect of the watch with a non-conductive housing and the watch with a conductive housing.

[0051] Optionally, the first radiating stub 300 and the second radiating stub 400 partially overlap, and the first radiating stub 300 and the second radiating stub 400 are coupled through the overlapping area.

[0052] The partial overlap of the first radiating stub 300 and the second radiating stub 400 specifically may mean that: there is a partial overlapping area between the end 340 of the first radiating stub 300 and the head 410 of the second radiating stub 400, and the first radiating stub 300 is coupled to the second radiating stub 400 through the partial overlapping area.

[0053] Wherein, the head 350 of the first radiating stub 300 may refer to: a small segment including the end of the first radiating stub 300 closer to the first terminal 210. The end 340 of the first radiating stub 300 may refer to: a small segment including the end of the first radiating stub 300 farther from the first terminal 210, that is, the distance between the head 350 of the first radiating stub 300 and the first terminal 210 is less than the distance between the end 340 of the first radiating stub 300 and the first terminal 210. The head of the second radiating stub 400 may refer to: a small segment of the second radiating stub 400 for receiving the coupled feeding signal.

[0054] The fact that there is a partial overlapping area between the end 340 of the first radiating stub 300 and the head 410 of the second radiating stub 400 means that the area of the end 340 of the first radiating stub 300 and the area of the head of the second radiating stub 400 are stacked, that is, the area of the end 340 of the first radiating stub 300 is opposite to the area of the head of the second radiating stub 400. Please refer to Figure 1 , there is a certain gap between the end 340 of the first radiating stub 300 and the head 410 of the second radiating stub 400, so that coupling occurs between the end 340 of the first radiating stub 300 and the head 410 of the second radiating stub 400.

[0055] Please refer to Figure 1 , in some embodiments of the present application, the head 410 of the second radiating stub 400 can extend to the side of the first radiating stub 300 facing away from the circuit board 200. In this way, a partial overlapping area can exist between the first radiating stub 300 and the second radiating stub 400. In addition, in some other embodiments of the present application, the head 410 of the second radiating stub 400 can also be extended between the first radiating stub 300 and the circuit board 200. In this way, a partial overlapping area can exist between the first radiating stub 300 and the second radiating stub 400.

[0056] The distance between the first terminal 210 and the head 350 of the first radiating stub 300 can be less than the distance between the first terminal 210 and the end 340 of the first radiating stub 300.

[0057] In this embodiment, by partially overlapping the first radiating stub 300 and the second radiating stub 400, and coupling the first radiating stub 300 and the second radiating stub 400 through the overlapping area, in the process of feeding a feeding signal from the first terminal 210 to the first radiating stub 300, the feeding signal in the first radiating stub 300 can be coupled to the second radiating stub 400 through the overlapping area between the first radiating stub 300 and the second radiating stub 400, so as to generate a second radiation mode in the second radiating stub 400.

[0058] Optionally, the watch further includes a Bluetooth (BT) antenna 500, the housing 100 is a non-conductive housing, and the third terminal 230 is a feeding terminal of the Bluetooth antenna 500.

[0059] Among them, the Bluetooth antenna 500 can be a conductive radiator capable of signal radiation. The Bluetooth antenna 500 can be embedded in the inner wall of the non-conductive housing, and one side of the Bluetooth antenna 500 located on the inner wall of the non-conductive housing is exposed to the outside, so that corresponding terminals in the circuit board 200 can be connected to the Bluetooth antenna 500.

[0060] Specifically, please refer to Figure 1 , the circuit board 200 further includes a Bluetooth ground terminal 240 located on one side of the third terminal 230. The Bluetooth ground terminal 240 is connected to the Bluetooth antenna 500 to realize the grounding of the Bluetooth antenna 500. Among them, the Bluetooth ground terminal 240 can be connected to the ground plane in the circuit board 200.

[0061] In this embodiment, by using the third terminal 230 of the circuit board 200 as the feeding terminal of the Bluetooth antenna 500, in this way, a Bluetooth function can be formed in a watch with a non-conductive housing.

[0062] Optionally, the housing 100 is a non-conductive housing. The first radiation branch 300 includes a first segment 310, a second segment 320, and a third segment 330 that are sequentially connected. The first segment 310 and the third segment 330 are arranged in parallel, and the second segment 320 is located on the side of the first segment 310 away from the second radiation branch 400.

[0063] The first segment 310 operates at a quarter wavelength of the positioning frequency band corresponding to the positioning antenna 800, and the third segment 330 operates at a quarter wavelength of the Bluetooth frequency band; the first terminal 210 is the feeding terminal of the Bluetooth antenna 500 in the watch.

[0064] Specifically, the feed source of the positioning antenna 800 and the feed source of the Bluetooth antenna 500 can be respectively electrically connected to the first terminal 210. In this way, the circuit board 200 can feed the feeding signal of the positioning antenna 800 and the feeding signal of the Bluetooth antenna 500 to the first radiation branch 300 through the first terminal 210. Since the first segment 310 operates at a quarter wavelength of the positioning frequency band corresponding to the positioning antenna 800, therefore, the first segment 310 can be used as the radiator of the positioning antenna 800. Correspondingly, since the third segment 330 operates at a quarter wavelength of the Bluetooth frequency band, therefore, the third segment 330 can form the radiator of the Bluetooth antenna 500. Among them, the positioning frequency band is the operating frequency band of the positioning antenna 800, and the Bluetooth frequency band is the operating frequency band of the Bluetooth antenna 500.

[0065] It can be understood that the above-mentioned first terminal 210 can be electrically connected to any one of the first segment 310, the second segment 320, and the third segment 330. The above-mentioned second segment 320 can be perpendicular to the first segment 310 and the third segment 330 respectively.

[0066] Please refer to Figure 8 , the length of the first segment 310 can be greater than the length of the third segment 330. The end 340 of the first radiation stub 300 can be located on the first segment 310. Specifically, one end of the first segment 310 close to the second radiation stub 400 can form the end 340 of the first radiation stub 300. That is, one end of the first segment 310 close to the second radiation stub 400 has a partial overlapping area with the head 410 of the second radiation stub 400, and one end of the first segment 310 close to the second radiation stub 400 is coupled to the head 410 of the second radiation stub 400.

[0067] Figures 25 to 32 The relevant simulation parameters obtained by simulating the GPS antenna of this embodiment can be seen that the GPS antenna can also achieve GPS circular polarization. This embodiment can realize GPS and BT co-feeding, reduce the space for separately setting the BT antenna, and further reduce the cost. The disadvantage is that the performance of the antenna is slightly worse.

[0068] In this embodiment, a dual-radiation branch is formed by the first radiation stub 300 to realize the dual-band design of the positioning antenna 800 and the Bluetooth antenna 500. In this way, the space required for separately setting the Bluetooth antenna 500 is reduced, the occupation of the space in the watch is avoided, and at the same time, the cost is further reduced.

[0069] Optionally, the watch further includes a Bluetooth antenna 500. The housing 100 is a conductive housing. The Bluetooth antenna 500 is spaced from the housing 100. The circuit board 200 further includes a fourth terminal 270, and the fourth terminal 270 is the feeding terminal of the Bluetooth antenna 500.

[0070] Specifically, the Bluetooth antenna 500 can be pasted on the bottom case of the watch. Please refer to Figure 6 , the fourth terminal 270 can be located between the first section and the third terminal 230. The fourth terminal 270 can be connected to one end of the Bluetooth antenna 500 to feed a feeding signal into the Bluetooth antenna 500.

[0071] In this embodiment, by using the fourth terminal 270 as the feeding terminal of the Bluetooth antenna 500, in this way, the Bluetooth function can be formed in the watch with a conductive housing.

[0072] Optionally, the circuit board 200 includes a first apex angle 280, a second apex angle 290, and a third apex angle 211. The first apex angle 280 and the second apex angle 290 are adjacent angles to each other. The second apex angle 290 and the third apex angle 211 are opposite angles to each other. The first terminal 210 is disposed adjacent to the first apex angle 280. The second terminal 220 is disposed adjacent to the second apex angle 290. The third terminal 230 is disposed adjacent to the third apex angle 211.

[0073] The fact that the first terminal 210 is disposed adjacent to the first apex angle 280 may mean that: the first terminal 210 is located near the first apex angle 280. Specifically, the fact that the first terminal 210 is disposed adjacent to the first apex angle 280 may specifically mean that: the distance between the first terminal 210 and the first apex angle 280 is less than a preset distance value, where the preset distance value is less than one quarter of the distance between the first apex angle 280 and the second apex angle 290. Or, please refer to Figure 1 , the first terminal 210 is between the first apex angle 280 and the second apex angle 290. The fact that the first terminal 210 is disposed adjacent to the first apex angle 280 may specifically mean that: the distance between the first terminal 210 and the first apex angle 280 is much less than the distance between the first terminal 210 and the second apex angle 290.

[0074] Correspondingly, the fact that the second terminal 220 is disposed adjacent to the second apex angle 290 may mean that: the second terminal 220 is located near the second apex angle 290. Specifically, the fact that the second terminal 220 is disposed adjacent to the second apex angle 290 may specifically mean that: the distance between the second terminal 220 and the second apex angle 290 is less than the preset distance value. Or, please refer to Figure 1 , the second terminal 220 is between the second apex angle 290 and the fourth apex angle 212. The fact that the second terminal 220 is disposed adjacent to the second apex angle 290 may specifically mean that: the distance between the second terminal 220 and the second apex angle 290 is much less than the distance between the second terminal 220 and the fourth apex angle 212.

[0075] Correspondingly, the fact that the third terminal 230 is disposed adjacent to the third apex angle 211 may mean that: the third terminal 230 is located near the third apex angle 211. Specifically, the fact that the third terminal 230 is disposed adjacent to the third apex angle 211 may specifically mean that: the distance between the third terminal 230 and the third apex angle 211 is less than the above-mentioned preset distance value. Or, please refer to Figure 1, the third terminal 230 is located between the third vertex angle 211 and the fourth vertex angle 212. The fact that the third terminal 230 is disposed adjacent to the third vertex angle 211 specifically may mean that: the distance between the third terminal 230 and the third vertex angle 211 is much smaller than the distance between the third terminal 230 and the fourth vertex angle 212.

[0076] In some embodiments of the present application, when the watch has a dial, the first terminal 210 may be located at the 11 o'clock direction of the dial, the second terminal 220 may be located at the 1 o'clock direction of the dial, and the third terminal 230 may be located at the 7 o'clock direction of the dial.

[0077] In this embodiment, through experiments, it is verified that when the first terminal 210 is disposed adjacent to the first vertex angle 280, the second terminal 220 is disposed adjacent to the second vertex angle 290, and the third terminal 230 is disposed adjacent to the third vertex angle 211, the antenna in the watch can have a better radiation effect.

[0078] Optionally, the circuit board 200 includes a fourth vertex angle 212, the fourth vertex angle 212 and the second vertex angle 290 are opposite angles to each other. The circuit board 200 further includes a fifth terminal 260. The fifth terminal 260 is a ground terminal, and the fifth terminal 260 is disposed adjacent to the fourth vertex angle 212.

[0079] The fact that the fifth terminal 260 is disposed adjacent to the fourth vertex angle 212 may mean that: the fifth terminal 260 is located near the fourth vertex angle 212. Specifically, the fact that the fifth terminal 260 is disposed adjacent to the fourth vertex angle 212 may specifically mean that: the distance between the fifth terminal 260 and the fourth vertex angle 212 is less than the above preset distance value. Or, please refer to Figure 3 , the fifth terminal 260 is located between the third vertex angle 211 and the fourth vertex angle 212. The fact that the fifth terminal 260 is disposed adjacent to the fourth vertex angle 212 may also specifically mean that: the distance between the fifth terminal 260 and the fourth vertex angle 212 is much smaller than the distance between the fifth terminal 260 and the third vertex angle 211.

[0080] Among them, the above conductive frame may be connected to only one ground terminal, i.e., the third terminal 230, that is, the conductive frame is not connected to the fifth terminal 260. At this time, the conductive frame is grounded through the third terminal 230. Or, the conductive frame may also be connected to two ground terminals, i.e., the third terminal 230 and the fifth terminal 260 at the same time. At this time, the conductive frame is grounded through the third terminal 230 and the fifth terminal 260 at the same time.

[0081] Specifically, the fifth terminal 260 may be a grounding terminal reserved on the circuit board 200. When the housing 100 is a conductive housing, the fifth terminal 260 may be connected to the housing 100. Alternatively, the fifth terminal 260 may not be connected to the housing 100. In some embodiments of the present application, the fifth terminal 260 may be preset not to be connected to the housing 100. During actual debugging, when the debugging result is not ideal, the fifth terminal 260 may be connected to the housing 100. In this way, the grounding method can be determined according to the final debugging result.

[0082] Specifically, when the watch has a dial, the fifth terminal 260 may be located at the 5 o'clock direction of the dial.

[0083] Figure 12 For the PCB layout of the embodiments of the present application, through the above discussion, GPS power feeding is set at the 11 o'clock direction, a grounding position or LTE power feeding is set at the 1 o'clock direction, and grounding positions are set at the 5 o'clock direction and the 7 o'clock direction. This PCB layout can enable a plastic Bluetooth watch and a metal middle frame cellular watch to share the same PCB. The plastic Bluetooth watch is grounded at the 1 o'clock direction, and the metal middle frame cellular watch receives LTE power feeding at the upper frame of the 1 o'clock direction. The BOM tables of the plastic Bluetooth watch and the metal middle frame cellular watch are different, reducing the labor and material costs. Moreover, the GPS antennas of both the plastic Bluetooth watch and the metal middle frame cellular watch can achieve right-handed circular polarization. It is the first time in the industry to achieve the cellular function on the metal middle frame and at the same time achieve GPS circular polarization, solving this industry problem and having great engineering value.

[0084] In this embodiment, by providing the fifth terminal 260 in the circuit board 200 as a reserved grounding terminal, it is convenient to select whether to ground the housing 100 through the fifth terminal 260 according to actual needs in the future.

[0085] Optionally, the watch further includes a first lug 600 and a second lug 700. The first lug 600 and the second lug are located at both ends of the housing 100, and the positioning antenna 800 is located between the first lug 600 and the circuit board 200.

[0086] Wherein, the first lug 600 and the second lug 700 may be metal lugs respectively, and the first lug 600 and the second lug 700 may be protrusions extending from the outer surface of the housing 100, that is, the first lug 600 and the second lug 700 may be integrally formed with the housing 100.

[0087] Please refer to Figure 2, the first radiation branch 300 of the positioning antenna 800 can be located between the first lug 600 and the circuit board 200. The Bluetooth antenna 500 in the above embodiment can be located between the second lug 700 and the circuit board 200. In this way, the positioning antenna 800 and the Bluetooth antenna 500 can be hidden at the two lugs of the watch.

[0088] In this embodiment, by disposing the positioning antenna 800 between the first lug 600 and the circuit board 200, in this way, the positioning antenna 800 can be hidden at the first lug 600.

[0089] Optionally, the first matching circuit includes a capacitor, and the second matching circuit includes an inductor.

[0090] In this embodiment, the first matching circuit can only include one capacitor, that is, the second terminal 220 is grounded through the capacitor. In this way, by adjusting the value of the capacitor, the phase difference between the first radiation mode and the second radiation mode can be adjusted to make the polarization mode of the positioning antenna 800 circular polarization. Correspondingly, the second matching circuit can only include one inductor, that is, the third terminal 230 is grounded through the inductor. In this way, by adjusting the value of the inductor, the phase difference between the third radiation mode and the fourth radiation mode can be adjusted to make the polarization mode of the positioning antenna 800 circular polarization.

[0091] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the spirit and scope protected by the claims of the present application, and all of them belong to the protection scope of the present application.

Claims

1. A watch, comprising a housing and a circuit board, wherein the housing surrounds the circuit board, characterized in that, The circuit board includes a first terminal and a second terminal. The circuit board has a first operating mode and a second operating mode. The watch includes a positioning antenna; The housing is a non-conductive housing. The positioning antenna includes a first radiation branch and a second radiation branch disposed on the housing. The first radiation branch is coupled to the second radiation branch. When the circuit board is in the first operating mode, the first terminal is the feeding terminal of the positioning antenna, and the first terminal is connected to the first radiation branch. The second terminal is connected to the second radiation branch, and the second terminal is grounded through a first matching circuit. The polarization mode of the positioning antenna is circular polarization; or, The housing is a conductive housing. When the circuit board is in the second operating mode, the first terminal is the feeding terminal of the positioning antenna, and the first terminal is connected to the conductive housing. The second terminal is the feeding terminal of Long Term Evolution (LTE), and the second terminal is connected to the housing. The third terminal of the circuit board is connected to the housing, and the third terminal is grounded through a second matching circuit. The polarization mode of the positioning antenna is circular polarization.

2. The watch according to claim 1, wherein The housing is the non-conductive housing. During the process of the first terminal feeding a feeding signal to the first radiation branch, the first radiation branch operates in a first radiation mode, and the second radiation branch operates in a second radiation mode. The phase difference between the first radiation mode and the second radiation mode is 90°; or, The housing is a conductive housing. During the process of the first terminal feeding a feeding signal to the first radiation branch, a third radiation mode and a fourth radiation mode are generated in the housing. The phase difference between the third radiation mode and the fourth radiation mode is 90°.

3. The watch according to claim 1, characterized in that, The first radiation branch and the second radiation branch partially overlap, and the first radiation branch and the second radiation branch are coupled through the overlapping area.

4. The watch according to claim 1, characterized in that, The watch further includes a Bluetooth antenna. The housing is a non-conductive housing. The third terminal of the circuit board is the feeding terminal of the Bluetooth antenna.

5. The watch according to claim 1, characterized in that, The housing is a non-conductive housing. The first radiation branch includes a first segment, a second segment, and a third segment connected in sequence. The first segment and the third segment are arranged in parallel, and the second segment is located on the side of the first segment away from the second radiation branch; The first segment operates at a quarter wavelength of the positioning frequency band corresponding to the positioning antenna, and the third segment operates at a quarter wavelength of the Bluetooth frequency band; the first terminal is the feeding terminal of the Bluetooth antenna in the watch.

6. The watch according to claim 1, characterized in that, The watch further includes a Bluetooth antenna. The housing is a conductive housing. The Bluetooth antenna is spaced from the housing, and the circuit board further includes a fourth terminal. The fourth terminal is the feeding terminal of the Bluetooth antenna.

7. The watch according to claim 1, characterized in that, The circuit board includes a first vertex angle, a second vertex angle, and a third vertex angle. The first vertex angle and the second vertex angle are adjacent angles to each other. The second vertex angle and the third vertex angle are opposite angles to each other. The first terminal is adjacent to the first vertex angle. The second terminal is adjacent to the second vertex angle. The third terminal is adjacent to the third vertex angle.

8. The watch according to claim 7, characterized in that, The circuit board includes a fourth vertex angle, which is diagonal to the first vertex angle. The circuit board further includes a fifth terminal, which is a ground terminal, and the fifth terminal is disposed adjacent to the fourth vertex angle.

9. The watch according to claim 1, characterized in that, The watch further includes a first lug and a second lug. The first lug and the second lug are located at two ends of the housing, and the positioning antenna is located between the first lug and the circuit board.

10. The watch according to claim 1, characterized in that, The first matching circuit includes a capacitor, and the second matching circuit includes an inductor.

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