Watch

Abstract

The application discloses a watch and belongs to the technical field of electronic products. The watch comprises a frame body and a circuit board. The frame body comprises first and second watch lugs. A frame body region connected with the first watch lug is provided with a first feeding point, and a frame body region connected with the second watch lug is provided with a second feeding point. The circuit board comprises first and second radio frequency circuits. The first radio frequency circuit is electrically connected with the first feeding point, and the second radio frequency circuit is electrically connected with the second feeding point. In the case that the frame body accesses a first antenna signal from the first radio frequency circuit, the frame body generates a first circular polarization. In the case that the frame body accesses a second antenna signal from the second radio frequency circuit, the frame body generates a second circular polarization. The rotation direction of the first circular polarization is opposite to that of the second circular polarization.

Description

Technical Field

[0001] This application relates to the field of electronic product technology, specifically to a watch. Background Technology

[0002] With technological advancements, smartwatches of various types are becoming increasingly popular. In some smartwatches, antennas are typically deployed within the frame, and this frame can integrate more than two antennas. When two circularly polarized antennas with opposite rotation directions are deployed within the frame, because circularly polarized antennas with different rotation directions cannot coexist in the same frame, it is usually necessary to change the polarization of the two circularly polarized antennas to linear polarization to ensure their proper functioning. However, this deployment method results in both antennas losing 50% of their energy, thus degrading their antenna performance. Therefore, it is evident that related technologies suffer from the problem of circularly polarized antennas with different rotation directions being unable to coexist in the same frame. Summary of the Invention

[0003] This application relates to a watch that can solve the problem in related technologies where circularly polarized antennas with different rotation directions cannot coexist in the same frame.

[0004] In a first aspect, embodiments of this application provide a watch, including a frame and a circuit board. The frame surrounds the circuit board, and the outer wall of the circuit board is opposite to the inner wall of the frame. The frame includes a first strap connection position and a second strap connection position. The first strap connection position includes a first lug and a second lug arranged at intervals along the frame. The second strap connection position includes a third lug and a fourth lug arranged at intervals along the frame. The first lug is symmetrically arranged with respect to the fourth lug, and the second lug is symmetrically arranged with respect to the third lug. A first power supply point is provided in the frame area connected to the first lug, and a second power supply point is provided in the frame area connected to the second lug.

[0005] The frame area between the third lug and the first lug is the first frame area, the frame area between the first lug and the second lug is the second frame area, and the frame area between the second lug and the fourth lug is the third frame area. The electrical length of the first frame area and the electrical length of the third frame area are respectively greater than the electrical length of the second frame area.

[0006] The circuit board includes a first radio frequency circuit and a second radio frequency circuit, wherein the first radio frequency circuit is electrically connected to the first feed point and the second radio frequency circuit is electrically connected to the second feed point;

[0007] When the frame receives a first antenna signal from the first radio frequency circuit, the first antenna signal sequentially excites a first resonant mode in the first frame region and a second resonant mode in the second frame region, wherein there is an angle between the phase of the first resonant mode and the phase of the second resonant mode, so that the frame generates a first circular polarization;

[0008] When the frame receives the second antenna signal from the second radio frequency circuit, the second antenna signal sequentially excites the third resonant mode and the fourth resonant mode of the second frame region, wherein there is an angle between the phase of the third resonant mode and the phase of the fourth resonant mode, so that the frame generates a second circular polarization, and the rotation direction of the first circular polarization is opposite to the rotation direction of the second circular polarization.

[0009] In this embodiment, by electrically connecting the first radio frequency circuit to the first feed point of the frame and the second radio frequency circuit to the second feed point of the frame, when the frame receives a first antenna signal from the first radio frequency circuit, the first antenna signal sequentially excites a first resonant mode in the first frame region and a second resonant mode in the second frame region, wherein there is an angle between the phases of the first resonant mode and the second resonant mode, so that the frame generates a first circular polarization; when the frame receives a second antenna signal from the second radio frequency circuit, the second antenna signal sequentially excites the second frame region... The third resonant mode and the fourth resonant mode of the third frame region, wherein there is an angle between the phase of the third resonant mode and the phase of the fourth resonant mode, so that the frame generates a second circular polarization. The rotation direction of the first circular polarization is opposite to that of the second circular polarization. That is, when the frame receives the first antenna signal from the first radio frequency circuit, it can achieve the first circular polarization, and when it receives the second antenna signal from the second radio frequency circuit, it can achieve the second circular polarization. Since the rotation direction of the first circular polarization is opposite to that of the second circular polarization, it is possible for circularly polarized antennas with different rotation directions to coexist in the frame, which is beneficial to improving the antenna performance of the antenna in the frame. Attached Figure Description

[0010] Figure 1 This is one of the schematic diagrams of the internal structure of the watch in the embodiments of this application;

[0011] Figure 2 This is the second schematic diagram of the internal structure of the watch in the embodiments of this application;

[0012] Figure 3 These are diagrams illustrating three possible postures for a user while wearing a watch;

[0013] Figure 4 yes Figure 2 A cross-sectional view of the watch in the picture;

[0014] Figure 5 This is one of the schematic diagrams of the antenna circuit in the embodiments of this application;

[0015] Figure 6 Yes Figure 2 A schematic diagram of the simulation efficiency obtained by simulating the first GPS antenna in the embodiment shown.

[0016] Figure 7 Yes Figure 2 The radiation pattern obtained by simulation of the first GPS antenna in the illustrated embodiment;

[0017] Figure 8 Yes Figure 2 A schematic diagram of the simulation efficiency obtained by simulating the second GPS antenna in the embodiment shown.

[0018] Figure 9 Yes Figure 2 The radiation pattern obtained by simulation of the second GPS antenna in the illustrated embodiment;

[0019] Figure 10 Yes Figure 2 A 2D directional comparison diagram (Phi = 0° cross-section) obtained by simulating the first GPS antenna and the second GPS antenna in the embodiment shown.

[0020] Figure 11 Yes Figure 2 A 2D directional comparison diagram (Phi = 90° cross-section) obtained by simulating the first GPS antenna and the second GPS antenna in the embodiment shown.

[0021] Figure 12 Yes Figure 2 A 2D directional comparison diagram (Theta = 90° cross-section) obtained by simulating the first GPS antenna and the second GPS antenna in the embodiment shown.

[0022] Figure 13 Yes Figure 2 The schematic diagram shows the simulation results when power is supplied at the second location point in the embodiment shown.

[0023] Figure 14 Yes Figure 2 A schematic diagram of the simulation results when power is supplied at the third location point in the embodiment shown;

[0024] Figure 15 Yes Figure 2 The isolation curves obtained from the simulation of the first and second GPS antennas in the illustrated embodiment.

[0025] Figure 16 Yes Figure 2 The electric field distribution diagram obtained by simulating the first GPS antenna in the illustrated embodiment;

[0026] Figure 17 Yes Figure 2 The electric field distribution diagram obtained by simulation of the second GPS antenna in the embodiment shown;

[0027] Figure 18 Yes Figure 2 A schematic diagram comparing the electric field distribution obtained by simulating the first GPS antenna and the second GPS antenna in the embodiment shown.

[0028] Figure 19 Yes Figure 2 A schematic diagram of the current distribution obtained by simulating the first GPS antenna in the illustrated embodiment;

[0029] Figure 20 Yes Figure 2 A schematic diagram of the current distribution obtained from the simulation of the second GPS antenna in the illustrated embodiment;

[0030] Figure 21(a) shows the... Figure 2 A schematic diagram comparing the radiation patterns of the second GPS antenna in the illustrated embodiment under grounded and ungrounded states, respectively.

[0031] Figure 21(b) shows the... Figure 2 One of the simulation results of the first GPS antenna in the illustrated embodiment;

[0032] Figure 22 Yes Figure 2 The second schematic diagram of the simulation results of the first GPS antenna in the illustrated embodiment;

[0033] Figure 23 This is a schematic diagram illustrating the control principle for switching between the first GPS antenna and the second GPS antenna in an embodiment of this application;

[0034] Figure 24 This is the third schematic diagram of the internal structure of the watch in the embodiments of this application;

[0035] Figure 25 yes Figure 24 A cross-sectional view of the watch in the picture;

[0036] Figure 26 Is Figure 24 One of the simulation results is shown in the diagram where the antenna only includes the first groove.

[0037] Figure 27 Is Figure 24The second schematic diagram shows the simulation results obtained when the antenna only includes the first groove.

[0038] Figure 28 Is Figure 24 One of the simulation results is shown in the diagram where the antenna only includes the second groove.

[0039] Figure 29 Is Figure 24 The second schematic diagram shows the simulation results obtained when the antenna only includes the second groove.

[0040] Figure 30 Is Figure 24 A schematic diagram of the simulation results obtained when the antenna in the image includes both the first groove and the second groove.

[0041] Figure 31 This is the fourth schematic diagram of the internal structure of the watch in the embodiments of this application;

[0042] Figure 32 yes Figure 31 A cross-sectional view of the watch in the picture;

[0043] Figure 33 This is the second schematic diagram of the antenna circuit in the embodiments of this application;

[0044] Figure 34 This is the third schematic diagram of the antenna circuit in the embodiments of this application;

[0045] Figure 35 This is the fourth schematic diagram of the antenna circuit in the embodiments of this application;

[0046] Figure 36 This is a schematic diagram of the simulation results obtained when the frame is circular. Detailed Implementation

[0047] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0048] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0049] The following description, in conjunction with the accompanying drawings, details a watch provided in this application through specific embodiments and application scenarios.

[0050] Please see Figure 1 and Figure 2 This application provides a watch, which includes a frame 100 and a circuit board 200. The frame 100 surrounds the circuit board 200, and the outer wall of the circuit board 200 is opposite to the inner wall of the frame 100. The frame 100 includes a first strap connection position and a second strap connection position. The first strap connection position includes a first lug 120 and a second lug 130 arranged at intervals along the frame 100. The second strap connection position includes a third lug 110 and a fourth lug 140 arranged at intervals along the frame 100. The first lug 120 is symmetrically arranged with respect to the fourth lug 140, and the second lug 130 is symmetrically arranged with respect to the third lug 110. The frame area connected to the first lug 120 is provided with a first power supply point 121, and the frame area connected to the second lug 130 is provided with a second power supply point 131.

[0051] The frame region between the third lug 110 and the first lug 120 is the first frame region 150, the frame region between the first lug 120 and the second lug 130 is the second frame region 160, and the frame region between the second lug 130 and the fourth lug 140 is the third frame region 170. The electrical length of the first frame region 150 and the electrical length of the third frame region 170 are respectively greater than the electrical length of the second frame region 160.

[0052] The circuit board 200 includes a first radio frequency circuit 1100 and a second radio frequency circuit 1200. The first radio frequency circuit 1100 is electrically connected to the first feed point 121, and the second radio frequency circuit 1200 is electrically connected to the second feed point 131.

[0053] When the frame 100 receives a first antenna signal from the first radio frequency circuit 1100, the first antenna signal sequentially excites a first resonant mode of the first frame region 150 and a second resonant mode of the second frame region 160, wherein there is an angle between the phase of the first resonant mode and the phase of the second resonant mode, so that the frame 100 generates a first circular polarization.

[0054] When the frame 100 receives the second antenna signal from the second radio frequency circuit 1200, the second antenna signal sequentially excites the third resonant mode of the second frame region 160 and the fourth resonant mode of the third frame region 170, wherein there is an angle between the phase of the third resonant mode and the phase of the fourth resonant mode, so that the frame 100 generates a second circular polarization, and the rotation direction of the first circular polarization is opposite to the rotation direction of the second circular polarization.

[0055] The aforementioned central symmetry of the first lug 120 with respect to the fourth lug 140 can be interpreted as follows: the first lug 120 is centrally symmetrical with respect to the fourth lug 140 about the frame 100. Correspondingly, the central symmetry of the second lug 130 with respect to the third lug 110 can be interpreted as follows: the second lug 130 is centrally symmetrical with respect to the third lug 110 about the frame 100. Here, "center" refers to the center of the frame structure. For example, when the frame 100 is a rectangular frame, the "center" is the intersection of the two diagonals of the rectangular frame. Or, for example, when the frame 100 is a circular frame, the "center" is the center of the circle of the frame 100.

[0056] The electrical length mentioned above refers to the ratio of the physical length of the transmission line to the transmission wavelength.

[0057] The frame 100 can be the middle frame of a watch, and the frame 100 is a conductive frame 100, for example, it can be a frame 100 made of various metal materials.

[0058] The aforementioned first and second strap connection positions can be located on opposite sides of the frame 100, with the first end of the watch strap connected to the first strap connection position and the second end of the watch strap connected to the second strap connection position. In some embodiments of this application, the first strap connection position may further include a first connecting shaft, located between the first lug 120 and the second lug 130, with both ends of the first connecting shaft connected to the first lug 120 and the second lug 130 respectively, and the first end of the watch strap connected to the first connecting shaft. Correspondingly, the second strap connection position may further include a second connecting shaft, located between the third lug 110 and the fourth lug 140, with both ends of the second connecting shaft connected to the third lug 110 and the fourth lug 140 respectively, and the second end of the watch strap connected to the second connecting shaft.

[0059] Please see Figure 2 In some embodiments of this application, Figure 2 As shown in the back view of the watch, the first lug 120 and the first power supply point 121 can be located at the 1 o'clock position, where the 1 o'clock position refers to the position where the watch hands point to the 1 o'clock position on the dial. The second lug 130 and the second power supply point 131 can be located at the 11 o'clock position. Correspondingly, the third lug 110 can be located at the 5 o'clock position, and the fourth lug 140 can be located at the 7 o'clock position. Furthermore, in some other embodiments of this application, the first lug 120 and the first power supply point 121 can be located at the 2 o'clock, 7 o'clock, or 8 o'clock position. Accordingly, the other positions can be adjusted to adapt to the changes in the position of the first lug 120. For ease of understanding, the following description uses the example of the first lug 120 and the first power supply point 121 being located at the 1 o'clock position of the watch, the second lug 130 and the second power supply point 131 being located at the 11 o'clock position of the watch, the third lug 110 being located at the 5 o'clock position of the watch, and the fourth lug 140 being located at the 7 o'clock position of the watch to further explain the watch in the embodiment of this application.

[0060] It should be noted that, in order to ensure that the electrical lengths of the first frame region 150 and the third frame region 170 are respectively greater than the electrical length of the second frame region 160, the actual length of the first frame region 150 can be greater than the actual length of the second frame region 160, and simultaneously, the actual length of the third frame region 170 can be greater than the actual length of the second frame region 160. For example, the frame 100 can be set as a rectangular frame, with the first frame region 150 and the third frame region 170 being the regions containing two opposite sides along the length direction of the rectangular frame, and the second frame region 160 being the region containing one side along the width direction of the rectangular frame. Furthermore, when the frame 100 is a circular frame, the position of the lugs can also be adjusted to ensure that the actual length of the first frame region 150 is greater than the actual length of the second frame region 160, and simultaneously, the actual length of the third frame region 170 is greater than the actual length of the second frame region 160.

[0061] Currently, the main global positioning systems include the BeiDou Navigation Satellite System (BDS), the Global Positioning Satellite System (GPS), the GLONASS Navigation Satellite System, and the Galileo Navigation Satellite System. All of these navigation systems transmit signals to the ground using circularly polarized waves. Therefore, ground-based terminal equipment also needs to use circularly polarized antennas to receive positioning signals completely. If linearly polarized antennas are used, there will be a 50% energy loss, reducing the reception efficiency of ground-based terminal equipment.

[0062] Currently, the BeiDou satellite communication system for SMS also uses circularly polarized receiving antennas. Therefore, the antennas of ground terminals transmitting BeiDou SMS messages also need to be circularly polarized to achieve better communication performance. However, the antennas of the BeiDou SMS communication system use left-hand circular polarization, while the positioning system uses right-hand circular polarization. The positioning system GNLOASS operates at 1.602 GHz, while the uplink of the BeiDou satellite operates at 1.618 GHz. The frequencies are basically overlapping. In smartwatches, due to the similar frequency bands and space constraints, they can generally only share one antenna. However, since these two communication systems have similar frequencies but opposite polarizations, their antenna polarizations cannot coexist.

[0063] In related technologies, current watch antennas cannot satisfy both the right-hand circular polarization of the positioning system and the left-hand circular polarization of Beidou SMS. They are generally linearly polarized, which results in a 50% energy loss for both systems, but it can still ensure normal operation, only with a decrease in performance.

[0064] In some embodiments of this application, the first radio frequency circuit 1100 is the radio frequency circuit of the first antenna, and the second radio frequency circuit 1200 is the radio frequency circuit of the second antenna. The first antenna and the second antenna can each be two circularly polarized antennas. The first antenna and the second antenna can be any two circularly polarized antennas with opposite rotation directions that need to be deployed in the watch case 100. This application uses the example of the first antenna being a GPS antenna and the second antenna being a BeiDou satellite transmitting antenna to further explain the watch in this application embodiment.

[0065] It should be noted that, since the electrical lengths of the first frame region 150 and the third frame region 170 are respectively greater than the electrical length of the second frame region 160, the first resonant mode and the fourth resonant mode can be the long-side modes of the frame 100, and the second resonant mode and the third resonant mode can be the short-side modes of the frame 100. In some embodiments of this application, the first resonant mode can be a quarter-wavelength mode of the first frame region 150. The second resonant mode can be a quarter-wavelength mode of the second frame region 160. The third resonant mode can be a quarter-wavelength mode of the second frame region 160. The fourth resonant mode can be a quarter-wavelength mode of the third frame region 170.

[0066] The angle between the phases of the first and second resonant modes mentioned above can mean that the angle between the phases of the first and second resonant modes is within the range (0°, 90°). Correspondingly, the angle between the phases of the third and fourth resonant modes mentioned above can mean that the angle between the phases of the third and fourth resonant modes is within the range (0°, 90°). In some embodiments of this application, the angle between the phases of the first and second resonant modes can be 90° or close to 90°, and the angle between the phases of the third and fourth resonant modes can be 90° or close to 90°.

[0067] Please see Figure 19 Directly feeding the frame 100 can excite two modes of the frame 100, namely the long-side mode and the short-side mode. The long-side mode and the short-side mode are 90 degrees out of phase and are orthogonal to each other. Feeding at different positions can change the order in which these two modes are excited, thus controlling the polarization of the antenna. Therefore, if this application only requires feeding the upper frame, that is, feeding near the corner (such as 11 o'clock / 1 o'clock / 5 o'clock / 7 o'clock), circular polarization can be achieved. Feeding at the 1 o'clock position, such as... Figure 19As shown, the 0-degree phase corresponds to the long side mode, and the 90-degree phase corresponds to the short side mode. This means that the long side mode is excited first, followed by the short side mode, achieving right-hand circular polarization. Feeding at the 11 o'clock position is the opposite: the short side mode is excited first, followed by the long side mode, achieving left-hand circular polarization. Thus, polarization can be reconfigured by selecting different feeding positions. When the GPS antenna needs to operate, a switch can be used to switch to the 1 o'clock position for feeding. In this case, the antenna polarization is right-hand circular polarization, matching the polarization of GPS satellites, resulting in less polarization loss and thus improving GPS signal quality and user experience. When BeiDou satellite transmission is required, a switch can be used to switch to the 11 o'clock position for feeding. In this case, the antenna polarization is left-hand circular polarization, matching the uplink polarization of BeiDou satellites, reducing polarization loss and thus improving BeiDou satellite signal quality and communication experience. In this embodiment, the first circular polarization is right-hand circular polarization, and the second circular polarization is left-hand circular polarization.

[0068] It should be noted that, when the frame 100 receives the first antenna signal from the first radio frequency circuit 1100, it means that the frame 100 receives the first antenna signal from the first radio frequency circuit 1100 through the first feed point 121. Correspondingly, when the frame 100 receives the second antenna signal from the second radio frequency circuit 1200, it means that the frame 100 receives the second antenna signal from the second radio frequency circuit 1200 through the second feed point 131.

[0069] In this embodiment, by electrically connecting the first RF circuit 1100 to the first feed point 121 of the frame 100 and the second RF circuit 1200 to the second feed point 131 of the frame 100, when the frame 100 receives a first antenna signal from the first RF circuit 1100, the first antenna signal sequentially excites the first resonant mode of the first frame region 150 and the second resonant mode of the second frame region 160, wherein there is an angle between the phase of the first resonant mode and the phase of the second resonant mode, so that the frame 100 generates a first circular polarization; when the frame 100 receives a second antenna signal from the second RF circuit 1200, the second antenna signal sequentially excites the first resonant mode of the first frame region 150 and the second resonant mode of the second frame region 160. The third resonant mode of the second frame region 160 and the fourth resonant mode of the third frame region 170 are described, wherein there is an angle between the phase of the third resonant mode and the phase of the fourth resonant mode, so that the frame 100 generates a second circular polarization. The rotation direction of the first circular polarization is opposite to that of the second circular polarization. That is, when the frame 100 receives the first antenna signal from the first radio frequency circuit 1100, it can achieve the first circular polarization, and when it receives the second antenna signal from the second radio frequency circuit 1200, it can achieve the second circular polarization. Since the rotation direction of the first circular polarization is opposite to that of the second circular polarization, it is possible for circularly polarized antennas with different rotation directions to coexist in the frame 100, which is beneficial to improving the antenna performance of the antenna in the frame 100.

[0070] Optionally, the first radio frequency circuit 1100 is the radio frequency circuit of the first antenna, and the second radio frequency circuit 1200 is the radio frequency circuit of the second antenna. The operating frequency bands of the first antenna and the second antenna are both located in the first frequency band, and the perimeter of the frame 100 is equal to the wavelength corresponding to the center frequency point of the first frequency band.

[0071] The first antenna can be any type of positioning antenna, and the second antenna can be a transmitting antenna for a BeiDou satellite. Since both the positioning antenna and the BeiDou satellite transmitting antenna operate at approximately 1.6 GHz, they can be considered to operate at the same frequency, i.e., both are located in the first operating frequency band. For example, the first antenna can be a GPS antenna, and the second antenna can be a BeiDou satellite transmitting antenna. The GPS antenna mainly operates at approximately 1.575 GHz, and the BeiDou satellite transmitting antenna mainly operates at 1.618 GHz. As another example, the first antenna can be a GNLOASS antenna, and the second antenna can be a BeiDou satellite transmitting antenna. The GNLOASS antenna mainly operates at approximately 1.602 GHz, and the BeiDou satellite transmitting antenna mainly operates at 1.618 GHz.

[0072] The wavelength corresponding to the center frequency of the first frequency band mentioned above refers to the wavelength of the electromagnetic wave in a vacuum medium at the frequency value indicated by the center frequency of the first frequency band.

[0073] In this embodiment, by making the first radio frequency circuit 1100 the radio frequency circuit of the first antenna and the second radio frequency circuit 1200 the radio frequency circuit of the second antenna, the operating frequency bands of the first antenna and the second antenna are respectively located in the first frequency band, and the perimeter of the frame 100 is equal to the wavelength corresponding to the center frequency point of the first frequency band, it is beneficial to excite the circular polarization mode in the frame 100 when the frame 100 receives the first antenna signal from the first radio frequency circuit 1100 and the second antenna signal from the second radio frequency circuit 1200.

[0074] Optionally, the frame 100 is a non-seamless frame structure, and the frame 100 is rectangular or circular in shape.

[0075] Wherein, the frame 100 is a non-seamless frame structure, which means that the frame 100 is a complete frame 100, that is, there is no need to open a seam in the frame 100.

[0076] Please see Figure 2 In some embodiments of this application, the frame 100 is a rectangular frame. By changing the order in which the long-side and short-side modes are excited, left-handed circular polarization modes and right-handed circular polarization modes can be excited within the frame 100, respectively. Please refer to... Figure 36 In some embodiments of this application, the frame 100 is a circular frame, that is, the watch is a round watch. Please refer to [link / reference]. Figure 36 The figure shows a simulation diagram for a round watch. The simulation results show that the round frame has a similar pattern to the rectangular frame mentioned above. Therefore, the left-hand circular polarization mode and the right-hand circular polarization mode can be excited in the frame 100 respectively.

[0077] In this embodiment, since the frame 100 is rectangular or circular, different directions of circular polarization can coexist in the frame 100 of round and rectangular watches, which is beneficial for adapting to various types of watches.

[0078] Optionally, when the frame 100 is a rectangular frame, the preset rectangular area is a rectangle formed by the four borders of the frame 100. The first frame area 150, the second frame area 160 and the third frame area 170 are the areas where the three sequentially connected borders of the frame 100 are located, and the length of the border of the first frame area 150 is greater than the length of the border of the second frame area 160.

[0079] Please see Figure 2 In some embodiments of this application, the borders of the first frame region 150 and the second frame region 160 are the two opposite long sides of a rectangular frame. Correspondingly, the border of the second frame region 160 is the short side of the rectangular frame. In this case, the border of the second frame region 160 can specifically be the top border of the watch, and correspondingly, the borders of the first frame region 150 and the second frame region 160 are the two side borders of the watch, with the two lugs of the watch respectively located on the two side borders.

[0080] In this embodiment, by making the frame 100 a rectangular frame, the first frame region 150, the second frame region 160, and the third frame region 170 are the three sequentially connected border regions of the frame 100, and the length of the border of the first frame region 150 is greater than the length of the border of the second frame region 160, it is beneficial to achieve that the electrical length of the first frame region 150 and the electrical length of the third frame region 170 are greater than the electrical length of the second frame region 160.

[0081] Optionally, the length of the border of the first frame area 150 is in the range of 43mm to 50mm, and the length of the border of the second frame area 160 is in the range of 35mm to 40mm.

[0082] In this embodiment, by setting the length of the frame of the first frame region 150 to a range of 43mm to 50mm and the length of the frame of the second frame region 160 to a range of 35mm to 40mm, a quarter-resonant mode can be excited in the long and short sides of the frame 100 respectively during the process of the frame 100 receiving the first antenna signal or the second antenna signal, thereby facilitating the excitation of the circular polarization mode of the frame 100.

[0083] In some embodiments of this application, when the frame 100 is a circular frame, the diameter of the frame 100 ranges from 42mm to 48mm.

[0084] Optionally, the watch also includes an insulating back case 700, the inner wall of which is provided with an annular radiator 300, the annular radiator 300 including a third feed point 310, and the first radio frequency circuit 1100 is also electrically connected to the third feed point 310.

[0085] It is understood that the first radio frequency circuit 1100 can also form another GPS antenna with the ring radiator 300. For ease of understanding, in this embodiment, the GPS antenna formed by the first radio frequency circuit 1100 and the frame 100 is referred to as the first GPS antenna, and the GPS antenna formed by the first radio frequency circuit 1100 and the ring radiator 300 is referred to as the second GPS antenna. When the watch's GPS is working, in this embodiment, a dual-antenna switching method can be used to reconstruct the GPS antenna's radiation pattern. The first GPS antenna can generate a radiation pattern perpendicular to the watch screen 900 and facing the zenith. The second GPS antenna can generate a horizontal omnidirectional radiation pattern. During watch operation, the optimal antenna can be selected based on the user's usage scenario to achieve complementary radiation patterns, thereby improving the user's communication experience. For example, please refer to... Figure 3 (a) When the user wearing the watch is cycling, the first GPS antenna can be selected to operate because the watch face is facing the sky. See also [link to relevant documentation]. Figure 3 (b) When the user is walking, the second GPS antenna can be selected to operate because the side of the watch faces the sky. Please see [link to relevant documentation]. Figure 3 (c) When the user wearing the watch is running, the watch's current posture can be determined by the detection results of the relevant sensors in the watch due to the continuous swing of the user's arm. Based on the posture of the watch, the first GPS antenna or the second GPS antenna can be selected to work so that the radiation pattern of the GPS antenna in the watch is always facing the sky, thereby improving positioning accuracy and enhancing the user experience.

[0086] The related sensors can be multiple, including, for example, sensors such as accelerometers and gyroscopes in the watch that can determine the watch's attitude. Specifically, a logic algorithm can be pre-configured in the watch's controller. The controller determines the watch's attitude based on the detection results from multiple sensors such as the accelerometer and gyroscope, and then selects either the first or second GPS antenna to operate based on the watch's attitude. For example, please refer to [link to relevant documentation]. Figure 23 When the watch is in posture 1, the first GPS antenna can be controlled to work, while the second GPS antenna is not. When the watch is in posture 2, the first GPS antenna can be controlled to be not working, while the second GPS antenna is working. Posture 1 and posture 2 can include various preset postures. For example, posture 1 can include the watch face facing the sky or a similar posture. Posture 2 can include the side bezel of the watch facing the sky or a similar posture.

[0087] exist Figure 2In the illustrated embodiment, the aforementioned annular radiator 300 can be an insert steel sheet fabricated within the insulating base shell 700. The insulating base shell 700 can be a plastic base shell. The insert steel sheet can be positioned at a protrusion near the center of the base shell close to the human body, and the insert steel sheet has an annular structure with a diameter of 22mm to 28mm. The circular hole in the insert steel sheet can serve as a light-transmitting hole for photoplethysmograph (PPG). The insert steel sheet can be injection molded into the plastic base shell using in-mold injection molding. The thickness of the plastic base shell is 0.7mm to 1.0mm, and the thickness of the steel sheet is 0.1mm to 0.4mm. Please refer to [link to relevant documentation]. Figure 4 The image shows a cross-sectional view of a watch in some embodiments of this application. Since the second GPS antenna is implemented using a process of injection molding a steel sheet into a plastic mold in the bottom shell, this implementation method is low in cost.

[0088] In this embodiment, the watch also includes an insulating back cover 700, the inner wall of which is provided with an annular radiator 300. The annular radiator 300 includes a third feed point 310, and the first radio frequency circuit 1100 is electrically connected to the third feed point 310. Since the first GPS antenna can generate a radiation pattern perpendicular to the watch screen 900 and facing the zenith, and the second GPS antenna can generate a horizontal omnidirectional radiation pattern, the optimal antenna can be selected according to the user's usage scenario during watch operation to achieve complementary radiation patterns, thereby improving the user's communication experience.

[0089] Optionally, the third feed point 310 is located in the annular radiator 300 at a position directly opposite the first feed point 121.

[0090] The position in the annular radiator 300 that is directly opposite the first feed point 121 can be the position in the annular radiator 300 that is closest to the first feed point 121.

[0091] In some embodiments of this application, the first radio frequency circuit 1100 may be located in the area of ​​the circuit board 200 near the first feed point 121.

[0092] In this embodiment, by positioning the third feed point 310 in the annular radiator 300 directly opposite the first feed point 121, the first radio frequency circuit 1100 can be placed closer to both the first lug 120 and the third feed point 310, thereby reducing path loss during the operation of the first antenna.

[0093] Optionally, the watch further includes a first flexible printed circuit (FPC) 400, which is disposed opposite to the third frame region 170 and coupled to the third frame region 170. One end of the first FPC 400 facing the second feed point 131 is grounded through a matching device 500, wherein the matching device 500 is a capacitor or an inductor.

[0094] Please see Figure 2 In some embodiments of this application, one end of the first FPC400 facing the second power supply point 131 can be located at the 10 o'clock position of the watch. A first metal spring can be disposed at this position. One end of the first metal spring is electrically connected to the first FPC400 disposed on the inner side of the plastic back cover, and the other end of the first metal spring is electrically connected to an inductor or capacitor on the motherboard. The other end of the inductor or capacitor is connected to the ground of the motherboard. There is a reduced gap between the first FPC400 and the third frame region 170 to allow the first FPC400 to couple with the third frame region 170.

[0095] Figure 21(b) shows the polarization analysis of the first GPS antenna. Through the decomposition of the far-field radiation pattern, it can be seen that the right-hand circular polarization of the first GPS antenna is significantly higher than that of the left-hand circular polarization. Figure 22 It can be seen that by loading a capacitor in the first FPC400, the effect of circular polarization can be significantly improved. It can be seen that loading a 4.7pF capacitor can significantly improve the axial ratio of circular polarization, increase the right-hand component, and thus improve the purity of circular polarization, improve the reception strength of GPS signal, and improve the user positioning experience.

[0096] In this embodiment, by loading a capacitor or inductor to ground on the first FPC400 on the inner side of the bottom shell, the right-hand circular polarization component can be improved, thereby enhancing the GPS positioning effect.

[0097] Optionally, the annular radiator 300 includes at least two grounding points 320, which are arranged at intervals along the edge of the annular radiator 300.

[0098] The first radio frequency circuit 1100 is the radio frequency circuit of the first antenna. The operating frequency band of the first antenna is the first frequency band. The third feed point 310 is located at the edge of the annular radiator 300. Among the at least two grounding points 320, the grounding point 320 closest to the third feed point 310 is the first grounding point. The distance between the first grounding point and the third feed point 310 is greater than one-quarter of the wavelength corresponding to the center frequency band of the first frequency band. The grounding point 320 is grounded.

[0099] The number of grounding points 320 can be set as needed, for example, please refer to [link to relevant documentation]. Figure 1 In some embodiments of this application, the number of grounding points 320 is three. In other embodiments of this application, the number of grounding points 320 is two.

[0100] It is understood that the aforementioned third feed point 310 and ground point 320 can be located at the edges of the annular radiator 300, respectively.

[0101] The distance between the first grounding point and the third feed point 310 refers to the minimum distance from the first grounding point along the outer edge of the annular radiator 300 to the third feed point 310.

[0102] Figure 21(a) shows a comparison of the radiation patterns of the second GPS antenna with and without grounding at two points. The left image in Figure 21(a) shows the simulation result of the second GPS antenna without grounding, while the right image shows the simulation result of the second GPS antenna with two points grounding. As can be seen from Figure 21(a), by grounding at multiple points, the radiation pattern of the antenna can be changed from the direction perpendicular to the screen 90° to a horizontal omnidirectional pattern. Grounding causes the current on the ring radiator 300 to converge towards the center, forming eddy currents, thus producing a horizontal omnidirectional radiation pattern.

[0103] In this embodiment, by including at least two grounding points 320 in the annular radiator 300, the grounding points 320 are grounded, so that the current on the annular radiator 300 can converge towards the center to form eddy current, thus generating a horizontal omnidirectional radiation pattern.

[0104] Optionally, the watch further includes a first switch 1300 and a second switch 1400, wherein the first switch 1300 includes a first moving end 1310 and three first stationary ends 1320, and the second switch 1400 includes a second moving end 1410 and three second stationary ends 1420.

[0105] The first moving end 1310 is electrically connected to the second moving end 1410. The transmitting end of the first radio frequency circuit 1100, the transmitting end of the second radio frequency circuit 1200, and the receiving end of the second radio frequency circuit 1200 are electrically connected to the three first stationary ends 1320 in a one-to-one correspondence. The first feed point 121, the second feed point 131, and the third feed point 310 are electrically connected to the three second stationary ends 1420 in a one-to-one correspondence.

[0106] The first switching element 1300 and the second switching element 1400 can each be a single-pole three-throw switch. The first moving terminal 1310 is the common terminal of the first switching element 1300, and the first switching element 1300 can connect the first moving terminal 1310 to any one of the first stationary terminals 1320. Correspondingly, the second moving terminal 1410 is the common terminal of the second switching element 1400, and the second switching element 1400 can connect the second moving terminal 1410 to any one of the second stationary terminals 1420.

[0107] Please see Figure 5 The one-to-one electrical connection between the transmitting end of the first RF circuit 1100, the receiving end of the second RF circuit 1200 and the three first stationary terminals 1320 means that: the first RF circuit 1100 is electrically connected to one of the first stationary terminals 1320, the transmitting end of the second RF circuit 1200 is electrically connected to one of the first stationary terminals 1320, and the receiving end of the second RF circuit 1200 is electrically connected to one of the first stationary terminals 1320, and any two of the first RF circuit 1100, the transmitting end of the second RF circuit 1200 and the receiving end of the second RF circuit 1200 are connected to different first stationary terminals 1320.

[0108] Please see Figure 5 The one-to-one electrical connection between the first feed point 121, the second feed point 131, the third feed point 310 and the three second stationary terminals 1420 means that: the first feed point 121 is electrically connected to one of the second stationary terminals 1420, the second feed point 131 is electrically connected to one of the second stationary terminals 1420, and the third feed point 310 is electrically connected to one of the second stationary terminals 1420, and any two of the first feed point 121, the second feed point 131, and the third feed point 310 are connected to different second stationary terminals 1420.

[0109] It is understandable that by controlling the conduction state of the first switch 1300 and the second switch 1400, any one of the "first RF circuit 1100, the transmitting end of the second RF circuit 1200, and the receiving end of the second RF circuit 1200" can be connected to any one of the "first feed point 121, the second feed point 131, and the third feed point 310".

[0110] The one-to-one electrical connection between the first power supply point 121, the second power supply point 131, the third power supply point 310 and the three second stationary terminals 1420 means that the three second stationary terminals 1420 of the second switch 1400 are respectively connected to the first power supply point 121, the second power supply point 131, and the third power supply point 310.

[0111] It is understandable that the first GPS antenna and the Beidou transmitting antenna mentioned above are mid-frame antennas and share the same mid-frame radiator, only the power supply position is different. The second GPS antenna is an antenna made on the bottom shell.

[0112] In some embodiments of this application, the first power supply point 121 can be electrically connected to a second stationary terminal 1420 of the second switch 1400 disposed in the circuit board 200 via a second metal spring 610. Correspondingly, the second power supply point 131 can be electrically connected to a second stationary terminal 1420 of the second switch 1400 disposed in the circuit board 200 via a third metal spring 620. The third power supply point 310 can be electrically connected to a second stationary terminal 1420 of the second switch 1400 disposed in the circuit board 200 via a fourth metal spring.

[0113] In this embodiment, the first moving terminal 1310 is electrically connected to the second moving terminal 1410, and the transmitting terminals and receiving terminals of the first RF circuit 1100, the second RF circuit 1200, and the three first stationary terminals 1320 are electrically connected to each other. The first feed point 121, the second feed point 131, and the third feed point 310 are electrically connected to each other. Thus, the conduction state of the first switching element 1300 and the second switching element 1400 can be controlled according to the antenna efficiency, polarization characteristics, and direction. Figure 3 From the first GPS antenna, the second GPS antenna, and the BeiDou transmitting antenna, one antenna can be selected as the receiving antenna for the BeiDou satellite, thereby improving the antenna quality of the BeiDou satellite receiving antenna. Simultaneously, based on this circuit connection structure, a GPS antenna with an appropriate radiation pattern can be selected to operate according to the usage scenario. Specifically, by controlling the conduction state of the first switch 1300 and the second switch 1400, the radiation pattern of the GPS antenna can be reconfigured. Furthermore, by switching the feed point of the housing 100, the circular polarization rotation direction of the watch antenna can be switched, satisfying the coexistence of the GPS positioning system and the BeiDou SMS function antenna, and greatly improving the antenna receiving and transmitting capabilities of both systems. This achieves reconfigurable circular polarization rotation direction, significantly enhancing the user's GPS positioning and satellite communication experience.

[0114] Figure 6 The figure shows the efficiency of the first GPS antenna, which is -12.8 dB. Figure 7 This is the radiation pattern of the first GPS antenna, which generates a radiation pattern perpendicular to the dial. Figure 8 The efficiency of the second GPS antenna is -10dB. Figure 9This generates an omnidirectional radiation pattern in the horizontal direction for the second GPS antenna. Figure 10 and Figure 11 and Figure 12 The images show a 2D cross-sectional comparison at Phi = 0°, Phi = 90°, and Theta = 90°. The comparison demonstrates that because the radiation patterns of the two antennas are complementary, selecting the optimal radiation pattern ensures that the best antenna is chosen in all directions. In some directions, the gain is around 10dB, significantly improving the user's GPS experience in various scenarios. For example, while cycling, selecting the first GPS antenna produces a radiation pattern perpendicular to the watch face, while while walking, selecting the second GPS antenna produces a horizontal omnidirectional radiation pattern. This ensures that the optimal antenna is selected in any scenario, aligning the antenna's radiation pattern towards the sky, thus enhancing the user's GPS positioning experience. Figures 10 to 12 In this context, the middle frame antenna refers to the first GPS antenna mentioned above, and correspondingly, the bottom shell antenna refers to the second GPS antenna mentioned above.

[0115] Figure 13 As shown, when fed from the 1 o'clock direction, the middle frame antenna is right-hand circularly polarized, serving as the first GPS antenna. Figure 14 As shown, the power supply is located at the 11 o'clock position and is left-hand circularly polarized, serving as the transmitting antenna for BeiDou satellite communication.

[0116] Figure 15 This represents the isolation between the two antennas. Figure 16 This is a cross-sectional view of the electric field of the first GPS antenna. Its main radiation is generated by the gap between the mid-frame and the screen at 90°. Figure 17 This is a cross-sectional view of the electric field of the second GPS antenna. The main radiation is generated by the entire metal of the watch and the human body. The metal of the watch may include the metal frame, battery 800, PCB, etc. The human body acts as the ground of the antenna, thus greatly increasing the antenna aperture and making the second GPS antenna more efficient. Figure 18 This is a comparison of the electric field cross-sections of the two antennas. Figure 19 The current distribution of the first GPS antenna is shown. Figure 20 This represents the current distribution of the second GPS antenna.

[0117] Optionally, the annular radiator 300 is a second FPC attached to the inner wall of the insulating base shell 700.

[0118] In this embodiment, the annular radiator 300 is formed by attaching an FPC to the inner wall of the insulating base 700, which simplifies the antenna design and reduces costs.

[0119] Optionally, the annular radiator 300 has at least one notch 330.

[0120] Please see Figure 24 In some embodiments of this application, a plurality of notches 330 arranged at intervals along the axial direction of the annular radiator 300 may be provided on the outer edge of the annular radiator 300. At the same time, a plurality of notches 330 arranged at intervals along the axial direction of the annular radiator 300 may also be provided on the inner edge of the annular radiator 300. The notches 330 are strip-shaped notches 330 arranged radially along the annular radiator 300, and one end of the notch 330 extends to the outer edge of the annular radiator 300 or extends to the inner edge of the annular radiator 300.

[0121] In this embodiment, by providing at least one notch 330 in the annular radiator 300, wrinkling of the second FPC can be prevented, allowing the second FPC to fit tightly against the inner wall of the insulating base shell 700.

[0122] Optionally, please see Figure 31 The annular radiator 300 is a conductive layer printed on the inner wall of the insulating base shell 700.

[0123] In some embodiments of this application, the aforementioned annular radiator 300 may be a conductive layer formed by printing conductive silver paste on the inner wall of the insulating base shell 700 using a direct pad printing (PDS) process.

[0124] In this embodiment, by making the annular radiator 300 a conductive layer printed on the inner wall of the insulating base shell 700, it is beneficial to improve the performance of the second GPS antenna and make its design more flexible.

[0125] Optionally, please see Figure 33 The watch also includes a three-level three-channel 3P3T switch 1500, which includes three first connection terminals 1510 and three second connection terminals 1520. Of the first connection terminal 1510 and the second connection terminal 1520, one is an input terminal and the other is an output terminal.

[0126] The transmitting end of the first radio frequency circuit 1100, the receiving end of the second radio frequency circuit 1200, and the three first connection terminals 1510 are electrically connected in a one-to-one correspondence; the first feed point 121, the second feed point 131, and the third feed point 310 are electrically connected in a one-to-one correspondence with the three second connection terminals 1520.

[0127] Please see Figure 33The three first connection terminals 1510 mentioned above can be the three connection terminals on the left side of the 3P3T switch 1500, and correspondingly, the three second connection terminals 1520 mentioned above can be the three connection terminals on the right side of the 3P3T switch 1500. It can be understood that the 3P3T switch 1500 can connect any one of the left connection terminals with one of the right connection terminals to form a conductive path. In this case, one of the first GPS antenna, the second GPS antenna, and the BeiDou transmitting antenna is in a working state. Furthermore, the 3P3T switch 1500 can connect two of the left connection terminals with two of the right connection terminals to form two conductive paths. In this case, two of the first GPS antenna, the second GPS antenna, and the BeiDou transmitting antenna are in a working state. The 3P3T switch 1500 can also connect three of the left connection terminals with three of the right connection terminals to form three conductive paths. In this case, the first GPS antenna, the second GPS antenna, and the BeiDou transmitting antenna are all in a working state.

[0128] It is understood that, in the embodiments of this application, at least one of the first GPS antenna, the second GPS antenna, and the Beidou transmitting antenna can be controlled to enter the working state based on the 3P3T switch 1500, according to the actual needs of the scenario, so as to adapt to the needs of different scenarios.

[0129] In this embodiment, by electrically connecting the transmitting end of the first radio frequency circuit 1100, the receiving end of the second radio frequency circuit 1200, and the three first connection terminals 1510 in a one-to-one correspondence; and by electrically connecting the first feed point 121, the second feed point 131, and the third feed point 310 to the three second connection terminals 1520 in a one-to-one correspondence, at least one of the first GPS antenna, the second GPS antenna, and the Beidou transmitting antenna can be controlled to enter the working state by controlling the conduction state of the 3P3T switch 1500, so as to adapt to the needs of different scenarios.

[0130] Optionally, please see Figure 34 The watch also includes a first combiner 1600 and a third switch 1700, the third switch 1700 including a third moving terminal 1710 and three third stationary terminals 1720;

[0131] The transmitting end of the first radio frequency circuit 1100, the transmitting end of the second radio frequency circuit 1200, and the receiving end of the second radio frequency circuit 1200 are respectively electrically connected to the third moving end 1710 through the first combiner 1600; the first feed point 121, the second feed point 131, and the third feed point 310 are electrically connected to the three third stationary ends 1720 in a one-to-one correspondence.

[0132] Please see below. Figure 34The above-mentioned first power supply point 121, second power supply point 131, third power supply point 310 and the three third fixed terminals 1720 are connected in a one-to-one correspondence, which means that the three second fixed terminals 1420 of the third switch 1700 are connected to the first power supply point 121, the second power supply point 131 and the third power supply point 310 respectively.

[0133] The first combiner 1600 can transmit radio frequency signals from the transmitting end of the first radio frequency circuit 1100, the transmitting end of the second radio frequency circuit 1200, and the receiving end of the second radio frequency circuit 1200 simultaneously or individually. Correspondingly, the third switch 1700 is a single-pole three-throw switch, and the third switch 1700 can connect the third moving end 1710 and any one of the third stationary ends 1720.

[0134] In this embodiment, by electrically connecting the transmitting end of the first radio frequency circuit 1100, the transmitting end of the second radio frequency circuit 1200, and the receiving end of the second radio frequency circuit 1200 to the third moving end 1710 through the first combiner 1600 respectively; and by electrically connecting the first feed point 121, the second feed point 131, and the third feed point 310 to the three third stationary ends 1720 in a one-to-one correspondence, one of the first GPS antenna, the second GPS antenna, and the Beidou transmitting antenna can be controlled to enter the working state by controlling the conduction state of the third switch 1700, so as to adapt to different working scenarios.

[0135] Optionally, please see Figure 35 The watch also includes a second combiner 1800 and a fourth switch 1900, the fourth switch 1900 including a fourth moving terminal 1910 and two fourth stationary terminals 1920;

[0136] The first radio frequency circuit 1100 is electrically connected to the fourth moving terminal 1910. The first feed point 121 and the second feed point 131 are electrically connected to the two fourth stationary terminals 1920 in a one-to-one correspondence. The transmitting end and the receiving end of the second radio frequency circuit 1200 are electrically connected to the third feed point 310 through the second combiner 1800, respectively.

[0137] Please see Figure 35 The fourth switching element 1900 can be a single-pole double-throw switch.

[0138] In this embodiment, by electrically connecting the first RF circuit 1100 to the fourth moving terminal 1910, and the first feed point 121 and the second feed point 131 to the two fourth stationary terminals 1920 in a one-to-one correspondence, and by electrically connecting the transmitting and receiving terminals of the second RF circuit 1200 to the third feed point 310 via the second combiner 1800, the first RF circuit 1100 can be connected to either the first or second GPS antenna by controlling the conduction state of the fourth switch 1900, thereby enabling the reconfigurability of the GPS antenna pattern. Correspondingly, the first combiner 1600 can simultaneously or individually transmit the RF signals from the transmitting and receiving terminals of the second RF circuit 1200 to achieve the transceiver function of the BeiDou antenna. It is understood that the BeiDou antenna can operate simultaneously with the GPS antenna, or they can operate independently; there are no restrictions on this.

[0139] Optionally, a first groove is formed on the inner wall of the second frame region 160. The first groove is located at the middle position along the length direction of the second frame region 160. The thickness of the frame 100 at the first groove ranges from 0.1 mm to 0.5 mm. The dimension of the first groove along the length direction of the second frame region 160 ranges from 1 mm to 10 mm; and / or,

[0140] The frame area between the third lug 110 and the fourth lug 140 is the fourth frame area 180. The inner wall of the fourth frame area 180 is provided with a second groove. The second groove is located at the middle position of the length direction of the fourth frame area 180. The thickness of the frame 100 at the second groove is between 0.1mm and 0.5mm. The dimension of the second groove along the length direction of the fourth frame area 180 is between 1mm and 10mm.

[0141] In some embodiments of this application, the first groove may be located at the 12 o'clock position of the watch, and correspondingly, the second groove may be located at the 6 o'clock position of the watch.

[0142] Specifically, in order to further improve the circular polarization effect of the first GPS antenna, such as Figures 25-30As shown, by removing portions of the metal frame at the 12 o'clock and 6 o'clock positions, the first and second grooves are formed. This arrangement allows for the improvement of the right-hand circular polarization component of the first GPS antenna without altering the watch's unique identifier (ID) and appearance, thus enhancing the GPS positioning experience. The thickness of the removed portion of the metal frame at the 12 o'clock position is 0.1mm–0.5mm, and the width is 1mm–10mm. This can be flexibly adjusted according to the structure and adhesive application, resulting in a longer length of the metal frame. By perturbating the current path ratio in the length and width directions of the metal frame, the phase difference between the two excitation modes in the length and width directions is altered, thereby optimizing the circular polarization and improving the right-hand circular polarization component. Similarly, a portion of the metal frame at the 6 o'clock position can also be removed. Alternatively, portions of the metal frame at both the 12 o'clock and 6 o'clock positions can be removed simultaneously.

[0143] Among them, by Figure 26 As can be seen, the embodiments of this application can improve the right-hand circular pole by removing a portion of the metal frame at the 12 o'clock position. Figure 27 As can be seen, the axial ratio can be improved by 3dB by removing part of the metal mid-frame in the 12 o'clock direction in the embodiments of this application. Figure 28 As can be seen, the embodiments of this application further improve right-handed circular polarization by removing part of the metal midframe in the 6 o'clock direction. Figure 29 As can be seen, the axial ratio can be improved by 1.8dB by removing part of the metal mid-frame at the 6 o'clock position in the embodiments of this application. Figure 30 As can be seen, in this embodiment of the application, by removing the metal middle frame at the 6 o'clock and 12 o'clock positions, the antenna efficiency remains basically unchanged, and the right-hand circular polarization component is increased by 0.5dB, which can improve the right-hand circular polarization component, improve the axial ratio, and suppress the left-hand circular polarization component.

[0144] In this embodiment, by providing a first groove and / or a second groove in the frame 100, it is beneficial to improve the right-hand circular polarization component and enhance the GPS positioning effect.

[0145] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other implementations under the guidance of this application without departing from the spirit and scope of the claims. All of these implementations are within the protection scope of this application.

Claims

1. A watch, characterized in that, The device includes a frame and a circuit board. The frame surrounds the circuit board, and the outer wall of the circuit board is opposite to the inner wall of the frame. The frame includes a first strap connection position and a second strap connection position. The first strap connection position includes a first lug and a second lug arranged at intervals along the frame. The second strap connection position includes a third lug and a fourth lug arranged at intervals along the frame. The first lug is symmetrically arranged with respect to the fourth lug, and the second lug is symmetrically arranged with respect to the third lug. A first power supply point is provided in the frame area connected to the first lug, and a second power supply point is provided in the frame area connected to the second lug. The frame area between the third lug and the first lug is the first frame area, the frame area between the first lug and the second lug is the second frame area, and the frame area between the second lug and the fourth lug is the third frame area. The electrical length of the first frame area and the electrical length of the third frame area are respectively greater than the electrical length of the second frame area. The circuit board includes a first radio frequency circuit and a second radio frequency circuit, wherein the first radio frequency circuit is electrically connected to the first feed point and the second radio frequency circuit is electrically connected to the second feed point; When the frame receives a first antenna signal from the first radio frequency circuit, the first antenna signal sequentially excites a first resonant mode in the first frame region and a second resonant mode in the second frame region, wherein there is an angle between the phase of the first resonant mode and the phase of the second resonant mode, so that the frame generates a first circular polarization; When the frame receives the second antenna signal from the second radio frequency circuit, the second antenna signal sequentially excites the third resonant mode and the fourth resonant mode of the second frame region, wherein there is an angle between the phase of the third resonant mode and the phase of the fourth resonant mode, so that the frame generates a second circular polarization, and the rotation direction of the first circular polarization is opposite to the rotation direction of the second circular polarization.

2. The watch according to claim 1, characterized in that, The first radio frequency circuit is the radio frequency circuit of the first antenna, and the second radio frequency circuit is the radio frequency circuit of the second antenna. The operating frequency bands of the first antenna and the second antenna are both located in the first frequency band, and the perimeter of the frame is equal to the wavelength corresponding to the center frequency point of the first frequency band.

3. The watch according to claim 1, characterized in that, The frame is a non-seamless frame structure, and the shape of the frame is rectangular or circular.

4. The watch according to claim 3, characterized in that, When the frame is rectangular, the first frame area, the second frame area, and the third frame area are the three sequentially connected border areas of the frame, and the length of the border of the first frame area is greater than the length of the border of the second frame area.

5. The watch according to claim 4, characterized in that, The length of the border of the first frame area ranges from 43mm to 50mm, and the length of the border of the second frame area ranges from 35mm to 40mm.

6. The watch according to claim 1, characterized in that, The watch also includes an insulating back case, the inner wall of which is provided with an annular radiator, the annular radiator including a third feed point, and the first radio frequency circuit is also electrically connected to the third feed point.

7. The watch according to claim 6, characterized in that, The third feed point is located in the annular radiator, directly opposite the first feed point.

8. The watch according to claim 6, characterized in that, The watch also includes a first flexible circuit board (FPC), which is disposed opposite to the third frame area and coupled to the third frame area. One end of the first flexible circuit board (FPC) facing the second power supply point is grounded through a matching device, wherein the matching device is a capacitor or an inductor.

9. The watch according to claim 6, characterized in that, The annular radiator includes at least two grounding points, which are arranged at intervals along the edge of the annular radiator. The first radio frequency circuit is the radio frequency circuit of the first antenna, the operating frequency band of the first antenna is the first frequency band, the third feed point is located at the edge of the annular radiator, the grounding point closest to the third feed point among the at least two grounding points is the first grounding point, and the distance between the first grounding point and the third feed point is greater than one-quarter of the wavelength corresponding to the center frequency band of the first frequency band.

10. The watch according to claim 6, characterized in that, The watch also includes a first switch and a second switch, the first switch including a first moving end and three first stationary ends, and the second switch including a second moving end and three second stationary ends; The first moving end is electrically connected to the second moving end, and the transmitting end of the first radio frequency circuit, the transmitting end of the second radio frequency circuit, the receiving end of the second radio frequency circuit, and the three first stationary ends are electrically connected to each other in a corresponding manner; the first feed point, the second feed point, the third feed point, and the three second stationary ends are electrically connected to each other in a corresponding manner.

11. The watch according to claim 6, characterized in that, The annular radiator is a second FPC attached to the inner wall of the insulating base shell.

12. The watch according to claim 11, characterized in that, The annular radiator has at least one notch.

13. The watch according to claim 6, characterized in that, The watch also includes a three-level three-way 3P3T switch, which includes three first connection terminals and three second connection terminals. Of the first connection terminals and the second connection terminals, one is an input terminal and the other is an output terminal. The transmitting end of the first radio frequency circuit, the receiving end of the second radio frequency circuit, and the three first connection terminals are electrically connected to each other in a one-to-one correspondence; the first feed point, the second feed point, and the third feed point are electrically connected to the three second connection terminals in a one-to-one correspondence.

14. The watch according to claim 6, characterized in that, The watch also includes a first combiner and a third switch, the third switch including a third moving terminal and three third stationary terminals; The transmitting end of the first radio frequency circuit, the transmitting end of the second radio frequency circuit, and the receiving end of the second radio frequency circuit are respectively electrically connected to the third moving end through the first combiner; the first feed point, the second feed point, and the third feed point are electrically connected to the three third stationary ends one by one.

15. The watch according to claim 6, characterized in that, The watch also includes a second combiner and a fourth switch, the fourth switch including a fourth moving terminal and two fourth stationary terminals; The first radio frequency circuit is electrically connected to the fourth moving terminal. The first feed point and the second feed point are electrically connected to the two fourth stationary terminals in a one-to-one correspondence. The transmitting end and the receiving end of the second radio frequency circuit are electrically connected to the third feed point through the second combiner.

16. The watch according to any one of claims 1 to 15, characterized in that, A first groove is formed on the inner wall of the second frame area. The first groove is located at the middle position along the length of the second frame area. The thickness of the frame at the first groove ranges from 0.1 mm to 0.5 mm. The dimension of the first groove along the length of the second frame area ranges from 1 mm to 10 mm; and / or, The frame area between the third lug and the fourth lug is the fourth frame area. The inner wall of the fourth frame area is provided with a second groove. The second groove is located at the middle position of the length direction of the fourth frame area. The thickness of the frame at the second groove is between 0.1 mm and 0.5 mm. The dimension of the second groove along the length direction of the fourth frame area is between 1 mm and 10 mm.

Images