Watch

Abstract

The invention 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 a first watch lug and a second watch lug, a frame body area connected with the first watch lug is provided with a first feeding point, and a frame body area connected with the second watch lug is provided with a second feeding point; the circuit board comprises a first radio frequency circuit and a second radio frequency circuit, 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; under the condition that the frame body accesses a first antenna signal from the first radio frequency circuit, the frame body generates first circular polarization; and under the condition that the frame body accesses a second antenna signal from the second radio frequency circuit, the frame body generates second circular polarization, and 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 technical field of electronic products, and particularly to a watch. Background Art

[0002] With the development of technology, various types of smart watches have become increasingly popular. In related technologies, some smart watches usually deploy antennas in the housing, and two or more antennas can be integrated in the housing. When there are two circularly polarized antennas with opposite polarization directions among the antennas deployed in the housing, since different circularly polarized antennas with opposite polarization directions cannot coexist in the same housing in related technologies, it is usually necessary to change the polarization form of the two circularly polarized antennas to linear polarization for deployment to ensure that the two antennas can work properly. However, this deployment method will cause both of the two antennas to lose 50% of their energy, thereby degrading the antenna performance of the two antennas. It can be seen that in related technologies, there is a problem that different circularly polarized antennas with opposite polarization directions cannot coexist in the same housing. Summary of the Invention

[0003] This application relates to a watch, which can solve the problem in related technologies that different circularly polarized antennas with opposite polarization directions cannot coexist in the same housing.

[0004] In a first aspect, an embodiment of this application provides a watch, including a housing and a circuit board. The housing surrounds the circuit board, and the outer side wall of the circuit board faces the inner wall of the housing. The housing includes a first watch band connection position and a second watch band connection position. The first watch band connection position includes a first lug and a second lug arranged at intervals along the housing. The second watch band connection position includes a third lug and a fourth lug arranged at intervals along the housing. The first lug is symmetrically arranged with respect to the fourth lug at the center, and the second lug is symmetrically arranged with respect to the third lug at the center. A first feeding point is provided in the area of the housing connected to the first lug, and a second feeding point is provided in the area of the housing connected to the second lug.

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

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

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

[0008] When the housing accesses the second antenna signal from the second radio frequency circuit, the second antenna signal sequentially excites a third resonance mode of the second housing region and a fourth resonance mode of the third housing region, wherein there is an included angle between the phase of the third resonance mode and the phase of the fourth resonance mode, so that the housing 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 the embodiment of the present application, by electrically connecting the first radio frequency circuit to the first feeding point of the housing and the second radio frequency circuit to the second feeding point of the housing, when the housing accesses the first antenna signal from the first radio frequency circuit, the first antenna signal sequentially excites a first resonance mode of the first housing region and a second resonance mode of the second housing region, wherein there is an included angle between the phase of the first resonance mode and the phase of the second resonance mode, so that the housing generates a first circular polarization; when the housing accesses the second antenna signal from the second radio frequency circuit, the second antenna signal sequentially excites a third resonance mode of the second housing region and a fourth resonance mode of the third housing region, wherein there is an included angle between the phase of the third resonance mode and the phase of the fourth resonance mode, so that the housing 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. That is, when the housing accesses the first antenna signal from the first radio frequency circuit, the first circular polarization can be realized, and when the housing accesses the second antenna signal from the second radio frequency circuit, the second circular polarization can be realized, and the rotation direction of the first circular polarization is opposite to the rotation direction of the second circular polarization. Thus, circular polarization antennas with different rotation directions can coexist in the housing, which is beneficial to improving the antenna performance of the antenna in the housing. Description of the Drawings

[0010] Figure 1 is one of the schematic diagrams of the internal structure of the watch in the embodiment of the present application;

[0011] Figure 2 is another schematic diagram of the internal structure of the watch in the embodiment of the present application;

[0012] Figure 3 is a schematic diagram of three postures when the user wears the watch;

[0013] Figure 4 isFigure 2 Cross-sectional view of the watch in

[0014] Figure 5 One of the schematic diagrams of the antenna circuit principle in the embodiments of the present application;

[0015] Figure 6 It is for Figure 2 Schematic diagram of the simulation efficiency obtained by simulating the first GPS antenna in the shown embodiment;

[0016] Figure 7 It is for Figure 2 Pattern obtained by simulating the first GPS antenna in the shown embodiment;

[0017] Figure 8 It is for Figure 2 Schematic diagram of the simulation efficiency obtained by simulating the second GPS antenna in the shown embodiment;

[0018] Figure 9 It is for Figure 2 Pattern obtained by simulating the second GPS antenna in the shown embodiment;

[0019] Figure 10 It is for Figure 2 Schematic diagram of the 2D direction comparison (Phi = 0° section) obtained by simulating the first GPS antenna and the second GPS antenna in the shown embodiment;

[0020] Figure 11 It is for Figure 2 Schematic diagram of the 2D direction comparison (Phi = 90° section) obtained by simulating the first GPS antenna and the second GPS antenna in the shown embodiment;

[0021] Figure 12 It is for Figure 2 Schematic diagram of the 2D direction comparison (Theta = 90° section) obtained by simulating the first GPS antenna and the second GPS antenna in the shown embodiment;

[0022] Figure 13 It is for Figure 2 Schematic diagram of the simulation result when feeding at the second position point in the shown embodiment;

[0023] Figure 14 It is for Figure 2 Schematic diagram of the simulation result when feeding at the third position point in the shown embodiment;

[0024] Figure 15 It is for Figure 2 Isolation curve graph obtained by simulating the first GPS antenna and the second GPS antenna in the shown embodiment;

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

[0026] Figure 17 is the electric field distribution diagram obtained by simulating the second GPS antenna in the embodiment shown in Figure 2 ;

[0027] Figure 18 is the schematic diagram of the comparison of the electric field distributions obtained by simulating the first GPS antenna and the second GPS antenna in the embodiment shown in Figure 2 ;

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

[0029] Figure 20 is the schematic diagram of the current distribution obtained by simulating the second GPS antenna in the embodiment shown in Figure 2 ;

[0030] Figure 21(a) is the schematic diagram of the comparison of the radiation patterns obtained by respectively simulating the second GPS antenna in the embodiment shown in Figure 2 in the grounded and ungrounded states;

[0031] Figure 21(b) is one of the schematic diagrams of the simulation results obtained by simulating the first GPS antenna in the embodiment shown in Figure 2 ;

[0032] Figure 22 is the second schematic diagram of the simulation results obtained by simulating the first GPS antenna in the embodiment shown in Figure 2 ;

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

[0034] Figure 24 is the third schematic diagram of the internal structure of the watch in the embodiment of the present application;

[0035] Figure 25 is the Figure 24 cross-sectional view of the watch in

[0036] Figure 26 is one of the schematic diagrams of the simulation results obtained by simulation when the antenna in Figure 24 only includes the first groove;

[0037] Figure 27 is in Figure 24Schematic diagram II of the simulation results obtained when the antenna in

[0038] Figure 28 is only in the case of including the first groove; Figure 24 Schematic diagram I of the simulation results obtained when the antenna in

[0039] Figure 29 is only in the case of including the second groove; Figure 24 Schematic diagram II of the simulation results obtained when the antenna in

[0040] Figure 30 is only in the case of including the second groove; Figure 24 Schematic diagram of the simulation results obtained when the antenna in

[0041] Figure 31 is simultaneously including the first groove and the second groove;

[0042] Figure 32 is Figure 31 a cross-sectional view of the watch in

[0043] Figure 33 Schematic diagram II of the antenna circuit principle in the embodiments of the present application;

[0044] Figure 34 Schematic diagram III of the antenna circuit principle in the embodiments of the present application;

[0045] Figure 35 Schematic diagram IV of the antenna circuit principle in the embodiments of the present application;

[0046] Figure 36 Schematic diagram of the simulation results obtained by simulating the antenna when the housing is a circular housing. Detailed implementation manners

[0047] 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 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 of protection of the present application.

[0048] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable 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 generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0049] A watch provided in an embodiment of the present application is described in detail below through specific embodiments and application scenarios in conjunction with the accompanying drawings.

[0050] See also Figure 1 and Figure 2 The embodiment of the present application provides a watch, the watch comprising a frame 100 and a circuit board 200, the frame 100 is arranged around 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 comprises a first strap connection position and a second strap connection position, the first strap connection position comprises a first lug 120 and a second lug 130 arranged at intervals along the frame 100, the second strap connection position comprises a third lug 110 and a fourth lug 140 arranged at intervals along the frame 100, the first lug 120 is arranged symmetrically with respect to the center of the fourth lug 140, the second lug 130 is arranged symmetrically with respect to the center of the third lug 110, the frame area connected to the first lug 120 is provided with a first feeding point 121, and the frame area connected to the second lug 130 is provided with a second feeding point 131;

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

[0052] The circuit board 200 includes a first RF circuit 1100 and a second RF circuit 1200, wherein the first RF circuit 1100 is electrically connected to the first feeding point 121, and the second RF circuit 1200 is electrically connected to the second feeding point 131;

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

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

[0055] The above-mentioned first lug 120 being symmetrically arranged with respect to the center of the fourth lug 140 may mean that the first lug 120 is symmetrically arranged with respect to the center of the housing 100 with respect to the fourth lug 140. Correspondingly, the second lug 130 being symmetrically arranged with respect to the center of the third lug 110 may mean that the second lug 130 is symmetrically arranged with respect to the center of the housing 100 with respect to the third lug 110. Among them, the "center" refers to the center of the housing structure. For example, when the housing 100 is a rectangular housing, the "center" is the intersection of the two diagonals of the rectangular housing. Another example is that when the housing 100 is a circular housing, the "center" is the center of the housing 100.

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

[0057] Among them, the above-mentioned housing 100 can be the middle frame of a watch, and the housing 100 is a conductive housing 100. For example, it can be a housing 100 made of various metal materials.

[0058] The above-mentioned first watch band connection position and the second watch band connection position can be located on two opposite sides of the housing 100, and the first end of the watch band of the watch is connected to the first watch band connection position, and the second end of the watch band is connected to the second watch band connection position. In some embodiments of the present application, the first watch band connection position may further include a first connecting shaft, the first connecting shaft is located between the first lug 120 and the second lug 130, and both ends of the first connecting shaft are respectively connected to the first lug 120 and the second lug 130, and the first end of the watch band is connected to the first connecting shaft. Correspondingly, the second watch band connection position may further include a second connecting shaft, the second connecting shaft is located between the third lug 110 and the fourth lug 140, and both ends of the second connecting shaft are respectively connected to the third lug 110 and the fourth lug 140, and the second end of the watch band is connected to the second connecting shaft.

[0059] Please refer to Figure 2 , in some embodiments of the present application, Figure 2 is a rear view of the watch. The first lug 120 and the first feeding point 121 can be located at the 1 o'clock direction of the watch. Herein, the 1 o'clock direction refers to the direction where the watch hand points to the 1 o'clock position on the dial. The second lug 130 and the second feeding point 131 can be located at the 11 o'clock direction of the watch. Correspondingly, the third lug 110 can be located at the 5 o'clock direction of the watch, and the fourth lug 140 can be located at the 7 o'clock direction of the watch. In addition, in some other embodiments of the present application, the first lug 120 and the first feeding point 121 can be located at the 2 o'clock direction, 7 o'clock direction or 8 o'clock direction. Correspondingly, other position points can be adjusted adaptively according to the position change of the first lug 120. For the sake of easy understanding, hereinafter, taking the first lug 120 and the first feeding point 121 being located at the 1 o'clock direction of the watch, the second lug 130 and the second feeding point 131 being located at the 11 o'clock direction of the watch, the third lug 110 being located at the 5 o'clock direction of the watch, and the fourth lug 140 being located at the 7 o'clock direction of the watch as an example, the watch in the embodiments of the present application will be further explained.

[0060] It should be noted that in order to make the electrical length of the first frame area 150 and the electrical length of the third frame area 170 greater than the electrical length of the second frame area 160 respectively, the actual length of the first frame area 150 can be made greater than the actual length of the second frame area 160. At the same time, the actual length of the third frame area 170 is made greater than the actual length of the second frame area 160. For example, the frame 100 can be set as a rectangular frame. The first frame area 150 and the third frame area 170 are respectively the areas where two opposite sides in the length direction of the rectangular frame are located, and the second frame area 160 is the area where one side in the width direction of the rectangular frame is located. In addition, when the frame 100 is a circular frame, the position of the lug can also be adjusted to make the actual length of the first frame area 150 greater than the actual length of the second frame area 160, and at the same time, make the actual length of the third frame area 170 greater than the actual length of the second frame area 160.

[0061] Currently, the main global positioning systems are the Beidou Navigation Satellite System (BDS), the Global Navigation Satellite System (GPS), the Global Navigation Satellite System (GLONASS), and the Galileo satellite navigation system. These navigation systems all transmit signals to the ground in the form of circularly polarized waves. Therefore, terminal devices on the ground also need to use circularly polarized antennas to completely receive positioning signals. If linearly polarized antennas are used, there will be a 50% energy loss, reducing the receiving efficiency of ground terminal devices.

[0062] Currently, the Beidou short message satellite communication system also uses a circularly polarized receiving antenna. Therefore, the antenna for the ground terminal to transmit Beidou short messages also needs to be circularly polarized to achieve better communication performance. However, the antenna of the Beidou short message communication system uses left-handed circular polarization, and the positioning system uses right-handed circular polarization. The positioning system GNLOASS operates at 1.602 GHz, and the uplink of Beidou satellites operates at 1.618 GHz. The frequencies are basically overlapping. On smart watches, due to the similar frequency bands and space limitations, generally only one antenna can be shared. And the frequency points of these two communication systems are similar and the polarizations are opposite, so the antenna polarizations cannot coexist.

[0063] In the related art, the antenna of the current watch cannot satisfy both the right-handed circular polarization of the positioning system and the left-handed circular polarization of Beidou short messages. Generally, linear polarization is used, and in this way, both systems will lose 50% of the energy, but it can ensure normal operation, only the performance will decline.

[0064] In some embodiments of the present 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. Among them, the first antenna and the second antenna can be two circularly polarized antennas respectively. Among them, 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 frame 100 of the watch. Taking the first antenna as the GPS antenna and the second antenna as the transmitting antenna of the Beidou satellite in the embodiments of the present application as an example, the watch in the embodiments of the present application will be further explained.

[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, therefore, the above-mentioned first resonance mode and the fourth resonance mode can be respectively the long-side modes of the frame 100, and the above-mentioned second resonance mode and the third resonance mode can be respectively the short-side modes of the frame 100. In some embodiments of the present application, the first resonance mode can be the quarter-wavelength mode of the first frame region 150. The second resonance mode can be the quarter-wavelength mode of the second frame region 160. The third resonance mode can be the quarter-wavelength mode of the second frame region 160. The fourth resonance mode can be the quarter-wavelength mode of the third frame region 170.

[0066] The fact that there is an included angle between the phase of the above-mentioned first resonance mode and the phase of the second resonance mode can mean that: the included angle between the phase of the first resonance mode and the phase of the second resonance mode is within the interval (0°, 90°]. Correspondingly, the fact that there is an included angle between the phase of the above-mentioned third resonance mode and the phase of the fourth resonance mode can mean that: the included angle between the phase of the third resonance mode and the phase of the fourth resonance mode is within (0°, 90°]. In some embodiments of the present application, the included angle between the phase of the first resonance mode and the phase of the second resonance mode can be 90° or close to 90°, and, the included angle between the phase of the third resonance mode and the phase of the fourth resonance mode can be 90° or close to 90°.

[0067] Please refer to Figure 19 , directly feeding power to 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 have a phase difference of 90 degrees and are orthogonal to each other. Feeding power at different positions can change the order of excitation of these two modes, and thus the polarization mode of the antenna can be adjusted. Therefore, if only one upper frame of the present application is fed with power, that is, feeding power at a position close to the corner (such as 11 o'clock / 1 o'clock / 5 o'clock / 7 o'clock), circular polarization can be achieved. Feeding power in the 1 o'clock direction, such as Figure 19As shown, the 0-degree phase is the mode in the long-side direction, and the 90-degree phase is the mode in the short-side direction. That is, by first exciting the mode in the long-side direction and then exciting the mode in the short-side direction, right-handed circular polarization can be achieved. Feeding at the 11 o'clock direction is exactly the opposite. By first exciting the mode in the short-side direction and then exciting the mode in the long-side direction, left-handed circular polarization can be achieved. That is, polarization reconfigurability can be realized by selecting different feeding positions. When the GPS antenna needs to work, it can be switched to the feeding at the 1 o'clock position through a switch. At this time, the polarization of the antenna is right-handed circular polarization, which matches the polarization mode of the GPS satellite, with small polarization loss, thus improving the signal quality of the GPS and enhancing the user experience. When the Beidou satellite needs to transmit, it can be switched to the feeding at the 11 o'clock position through a switch. At this time, the polarization of the antenna is left-handed circular polarization, which matches the polarization mode of the Beidou satellite's uplink, reducing polarization loss, thus improving the signal quality of the Beidou satellite and enhancing the communication experience. That is, in this embodiment, the above-mentioned first circular polarization is right-handed circular polarization, and the above-mentioned second circular polarization is left-handed circular polarization.

[0068] It should be noted that the above-mentioned housing 100 accessing the first antenna signal from the first radio frequency circuit 1100 means that the housing 100 accesses the first antenna signal from the first radio frequency circuit 1100 through the first feeding point 121. Correspondingly, the above-mentioned housing 100 accessing the second antenna signal from the second radio frequency circuit 1200 means that the housing 100 accesses the second antenna signal from the second radio frequency circuit 1200 through the second feeding point 131.

[0069] In this embodiment, by electrically connecting the first radio frequency circuit 1100 to the first feeding point 121 of the housing 100 and the second radio frequency circuit 1200 to the second feeding point 131 of the housing 100, when the housing 100 receives the first antenna signal from the first radio frequency circuit 1100, the first antenna signal sequentially excites the first resonance mode of the first housing area 150 and the second resonance mode of the second housing area 160. Among them, there is an included angle between the phase of the first resonance mode and the phase of the second resonance mode, so that the housing 100 generates a first circular polarization; when the housing 100 receives the second antenna signal from the second radio frequency circuit 1200, the second antenna signal sequentially excites the third resonance mode of the second housing area 160 and the fourth resonance mode of the third housing area 170. Among them, there is an included angle between the phase of the third resonance mode and the phase of the fourth resonance mode, so that the housing 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 housing 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. And the rotation direction of the first circular polarization is opposite to that of the second circular polarization, so that circularly polarized antennas with different rotation directions can coexist in the housing 100, which is beneficial to improving the antenna performance of the antennas in the housing 100.

[0070] Optionally, the first radio frequency circuit 1100 is the radio frequency circuit of the first antenna, 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 in the first frequency band, and the perimeter of the housing 100 is equal to the wavelength corresponding to the center frequency point of the first frequency band.

[0071] Among them, the first antenna can be various positioning antennas, and the second antenna can be the transmitting antenna of the Beidou satellite. Since the operating frequency bands of the positioning antenna and the transmitting antenna of the Beidou satellite are both around 1.6 GHz, therefore, the two can be regarded as the same operating frequency band, that is, both are in the first operating frequency band. For example, the first antenna can be a GPS antenna, and the second antenna is the transmitting antenna of the Beidou satellite. Among them, the operating frequency band of the GPS antenna is mainly around 1.575 GHz, and the operating frequency band of the transmitting antenna of the Beidou satellite is mainly around 1.618 GHz. Another example is that the first antenna can be a GNLOASS antenna, and the second antenna is the transmitting antenna of the Beidou satellite. Among them, the operating frequency band of the GNLOASS antenna is mainly around 1.602 GHz, and the operating frequency band of the transmitting antenna of the Beidou satellite is mainly around 1.618 GHz.

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

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

[0074] Optionally, the housing 100 is a non-seamed housing structure, and the shape of the housing 100 is rectangular or circular.

[0075] Among them, the housing 100 being a non-seamed housing structure means that the housing 100 is a complete housing 100, that is, no seam needs to be opened in the housing 100.

[0076] Please refer to Figure 2 , in some embodiments of the present application, the housing 100 is a rectangular housing. In the embodiments of the present application, by changing the order of excitation of the above-mentioned long side mode and short side mode, a left-handed circular polarization mode and a right-handed circular polarization mode can be respectively excited in the housing 100. Please refer to Figure 36 , in some embodiments of the present application, the housing 100 is a circular housing, that is, the watch is a circular watch. Please refer to Figure 36 , which is a simulation schematic diagram for a circular watch. It can be seen from the simulation results that the circular housing also has a similar rule to the above-mentioned rectangular housing. Therefore, a left-handed circular polarization mode and a right-handed circular polarization mode can also be respectively excited in the housing 100.

[0077] In this embodiment, since the shape of the housing 100 is rectangular or circular, in this way, the coexistence of circular polarizations with different rotation directions can be respectively realized in the housings 100 of circular watches and rectangular watches, which is beneficial for applying to various types of watches.

[0078] Optionally, when the housing 100 is a rectangular housing, the preset rectangular area is the rectangle enclosed by the four side frames of the housing 100. The first housing area 150, the second housing area 160, and the third housing area 170 are respectively the areas where three successively connected side frames of the housing 100 are located, and the length of the side frame of the first housing area 150 is greater than the length of the side frame of the second housing area 160.

[0079] Please refer toFigure 2 , in some embodiments of the present application, the borders of the first frame area 150 and the borders of the second frame area 160 are two opposite long sides of a rectangular frame. Correspondingly, the border of the second frame area 160 is a short side of the rectangular frame. At this time, the border of the second frame area 160 may specifically be the top border of the watch. Correspondingly, the borders of the first frame area 150 and the second frame area 160 are two side borders of the watch, and two watch lugs are respectively arranged on the two side borders.

[0080] In this embodiment, by making the frame 100 a rectangular frame, the first frame area 150, the second frame area 160, and the third frame area 170 are respectively the areas where 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. In this way, it is beneficial to make the electrical lengths of the first frame area 150 and the third frame area 170 respectively greater than the electrical length of the second frame area 160.

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

[0082] In this embodiment, by making the value range of the length of the border of the first frame area 150 be 43 mm to 50 mm and the value range of the length of the border of the second frame area 160 be 35 mm to 40 mm, in the process of the frame 100 accessing the first antenna signal or the second antenna signal, a quarter resonance mode can be excited in the long side and the short side of the frame 100 respectively, which is beneficial to exciting the circular polarization mode of the frame 100.

[0083] In some embodiments of the present application, when the frame 100 is a circular frame, the value range of the diameter of the frame 100 is 42 mm to 48 mm.

[0084] Optionally, the watch further includes an insulating bottom case 700. An annular radiator 300 is provided on the inner wall of the insulating bottom case 700. The annular radiator 300 includes a third feeding point 310, and the first radio frequency circuit 1100 is also electrically connected to the third feeding point 310.

[0085] It can be understood that the first radio frequency circuit 1100 can also form another GPS antenna with the loop radiator 300. For the convenience of understanding, in the embodiments of the present application, the GPS antenna formed by the first radio frequency circuit 1100 and the housing 100 is referred to as the first GPS antenna, and the GPS antenna formed by the first radio frequency circuit 1100 and the loop radiator 300 is referred to as the second GPS antenna. Among them, when the GPS of the watch works, in the embodiments of the present application, the pattern reconstruction of the GPS antenna can be realized by means of dual-antenna switching. Among them, the first GPS antenna can generate a pattern perpendicular to the screen 900 of the watch and facing the zenith direction. The second GPS antenna can generate a horizontally omnidirectional pattern. During the operation of the watch, the optimal antenna can be selected according to the user's usage scenario to achieve pattern complementarity, thereby improving the user communication experience. For example, please refer to Figure 3 (a). When the user wearing the watch is in a cycling scenario, since the watch face is facing the sky, at this time, the first GPS antenna can be selected to work. Correspondingly, please refer to Figure 3 (b). When the user wearing the watch is in a walking scenario, since the side of the watch is facing the sky, therefore, the second GPS antenna can be selected to work. Please refer to Figure 3 (c). When the user wearing the watch is in a running scenario, since the user's arm is constantly swinging, therefore, the current posture of the watch can be judged according to the detection results of relevant sensors in the watch, and the first GPS antenna or the second GPS antenna can be selected to work according to the posture of the watch, so that the pattern of the GPS antenna in the watch always faces the sky, thereby improving the positioning accuracy and the user experience.

[0086] Among them, the number of sensors included in the relevant sensors can be multiple. For example, it can include sensors such as an accelerometer and a gyroscope in the watch that can judge the posture of the watch. Specifically, a logic algorithm can be pre-configured in the controller of the watch, and the controller in the watch judges the posture of the watch according to the detection results of multiple sensors such as the accelerometer and the gyroscope, and selects the first GPS antenna or the second GPS antenna to work according to the posture of the watch through the logic algorithm. For example, please refer to Figure 23 , when the posture of the watch is posture 1, the first GPS antenna can be controlled to work and the second GPS antenna does not work. When the posture of the watch is posture 2, the first GPS antenna can be controlled not to work and the second GPS antenna works. Among them, the posture 1 and the posture 2 can include various preset postures. For example, the posture 1 can include the posture in which the watch face faces the sky or a posture similar to this posture. The posture 2 can include the posture in which the side frame of the watch faces the sky or a posture similar to this posture.

[0087] In Figure 2In the illustrated embodiment, the above-mentioned annular radiator 300 may be an insert steel sheet made on the insulating bottom shell 700. The insulating bottom shell 700 may be a plastic bottom shell. The insert steel sheet may be disposed at a boss position in the center of the bottom shell close to the human body, and the insert steel sheet is in an annular structure with an annular diameter of 22 mm to 28 mm. The circular hole in the insert steel sheet may be used as a light transmission hole for photoplethysmography (PPG). Among them, the insert steel sheet may be injection-molded inside the plastic bottom shell by means of in-mold injection. The thickness of the plastic bottom shell is 0.7 mm to 1.0 mm, and the thickness of the steel sheet is 0.1 mm to 0.4 mm. Please refer to Figure 4 It is a cross-sectional view of a watch in some embodiments of the present application. Since the second GPS antenna is implemented by the process of in-mold injection of a steel sheet into the plastic bottom shell, this implementation method has a low cost.

[0088] In this embodiment, by making the watch further include an insulating bottom shell 700, an annular radiator 300 is provided on the inner wall of the insulating bottom shell 700. The annular radiator 300 includes a third feeding point 310, and the first radio frequency circuit 1100 is electrically connected to the third feeding point 310. Since the first GPS antenna can generate a radiation pattern perpendicular to the screen 900 of the watch and facing the zenith direction. The second GPS antenna can generate a horizontally omnidirectional radiation pattern. Therefore, during the operation of the watch, the optimal antenna can be selected according to the user's usage scenario to achieve the complementarity of the radiation patterns, thereby improving the user's communication experience.

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

[0090] Among them, the position in the annular radiator 300 opposite to the first feeding point 121 may be the position in the annular radiator 300 closest to the first feeding point 121.

[0091] In some embodiments of the present application, the first radio frequency circuit 1100 may be located in an area of the circuit board 200 close to the first feeding point 121.

[0092] In this embodiment, by making the third feeding point 310 located at a position in the annular radiator 300 opposite to the first feeding point 121, in this way, the first radio frequency circuit 1100 can be relatively close to both the first watch lug 120 and the third feeding point 310, thereby reducing the path loss during the operation of the first antenna.

[0093] Optionally, the watch further includes a first flexible printed circuit board 400 (FPC). The first FPC 400 is disposed opposite to the third housing area 170 and is coupled to the third housing area 170. One end of the first FPC 400 facing the second feeding point 131 is grounded through a matching device 500, where the matching device 500 is a capacitor or an inductor.

[0094] Please refer to Figure 2 , in some embodiments of the present application, one end of the first FPC 400 facing the second feeding point 131 may be located at the 10 o'clock position of the watch. A first metal elastic sheet may be provided at this position. One end of the first metal elastic sheet is electrically connected to the first FPC 400 disposed on the inner side of the plastic bottom case, and the other end of the first metal elastic sheet is electrically connected to an inductor or a capacitor on the main board. The other end of the inductor or the capacitor is connected to the ground of the main board. There is a reduced gap between the first FPC 400 and the third housing area 170 to enable the first FPC 400 to be coupled to the third housing area 170.

[0095] FIG. 21(b) is the polarization analysis of the first GPS antenna. Through the decomposition of the far-field radiation pattern, it can be seen that the right-handed component of the first GPS antenna is significantly higher than the left-handed component, which is right-handed circular polarization. Figure 22 It can be seen that by loading a capacitor through the first FPC 400, the effect of circular polarization can be significantly improved. It can be seen that if a 4.7 pF capacitor is loaded, the axial ratio of circular polarization can be significantly improved, the right-handed component can be increased, thus improving the purity of circular polarization and the reception intensity of GPS signals, and improving the user positioning experience.

[0096] In this embodiment, by loading a capacitor or an inductor to the ground on the inner side of the bottom case through the first FPC 400, the right-handed circular polarization component can be improved, and the GPS positioning effect can be enhanced.

[0097] Optionally, the annular radiator 300 includes at least two grounding points 320, and the at least two grounding points 320 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 feeding point 310 is located at the edge of the annular radiator 300. The grounding point 320 closest to the third feeding point 310 among the at least two grounding points 320 is the first grounding point. The distance between the first grounding point and the third feeding point 310 is greater than one quarter of the wavelength corresponding to the center frequency band of the first frequency band, and the grounding point 320 is grounded.

[0099] Among them, the number of the grounding points 320 can be set as required. For example, please refer to Figure 1 , in some embodiments of the present application, the number of the grounding points 320 is three. In some other embodiments of the present application, the number of the grounding points 320 is two.

[0100] It can be understood that the above-mentioned third feeding point 310 and grounding point 320 can be respectively located at the edge of the annular radiator 300.

[0101] The distance between the above-mentioned first grounding point and the third feeding point 310 means: the minimum distance from the first grounding point along the outer edge of the annular radiator 300 to the third feeding point 310.

[0102] As shown in FIG. 21(a), it is a comparison of the radiation patterns of the second GPS antenna without grounding and with two-point grounding. Among them, the left figure in FIG. 21(a) is the simulation result of the second GPS antenna without grounding, and the right figure in FIG. 21(a) is the simulation result of the second GPS antenna with two-point grounding. It can be seen from FIG. 21(a) that by multi-point grounding, the radiation pattern of the antenna can be changed, from the direction perpendicular to the screen 900 to the horizontal omnidirectional. By grounding, the current on the annular radiator 300 converges towards the middle, forming a vortex current, thus generating a horizontal omnidirectional radiation pattern.

[0103] In this embodiment, by making the annular radiator 300 include at least two grounding points 320 and grounding the grounding points 320, in this way, the current on the annular radiator 300 can converge towards the middle, forming a vortex current, thus generating a horizontal omnidirectional radiation pattern.

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

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

[0106] Among them, the first switching element 1300 and the second switching element 1400 can be single-pole triple-throw switches respectively. The above-mentioned first moving end 1310 is the common end of the first switching element 1300, and the first switching element 1300 can conduct the first moving end 1310 and any one of the first fixed ends 1320. Correspondingly, the above-mentioned second moving end 1410 is the common end of the second switching element 1400, and the second switching element 1400 can conduct the second moving end 1410 and any one of the second fixed ends 1420.

[0107] Please refer to Figure 5 , the one-to-one electrical connection between the first radio frequency circuit 1100, the transmitting end of the second radio frequency circuit 1200, the receiving end of the second radio frequency circuit 1200 and the three first fixed ends 1320 means that: the first radio frequency circuit 1100 is electrically connected to one of the first fixed ends 1320, the transmitting end of the second radio frequency circuit 1200 is electrically connected to one of the first fixed ends 1320, the receiving end of the second radio frequency circuit 1200 is electrically connected to one of the first fixed ends 1320, and among 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, the first fixed ends 1320 connected by any two are different.

[0108] Please refer to Figure 5 , the one-to-one electrical connection between the first feeding point 121, the second feeding point 131, the third feeding point 310 and the three second fixed ends 1420 means that: the first feeding point 121 is electrically connected to one of the second fixed ends 1420, the second feeding point 131 is electrically connected to one of the second fixed ends 1420, the third feeding point 310 is electrically connected to one of the second fixed ends 1420, and among the first feeding point 121, the second feeding point 131, and the third feeding point 310, the second fixed ends 1420 connected by any two are different.

[0109] It can be understood that by controlling the conduction states of the first switching element 1300 and the second switching element 1400, any one of "the first radio frequency circuit 1100, the transmitting end of the second radio frequency circuit 1200, the receiving end of the second radio frequency circuit 1200" can be conducted with any one of "the first feeding point 121, the second feeding point 131, the third feeding point 310".

[0110] Among them, the one-to-one electrical connection between the first feeding point 121, the second feeding point 131, the third feeding point 310 and the three second fixed ends 1420 means that: the three second fixed ends 1420 of the second switching element 1400 are respectively connected to the first feeding point 121, the second feeding point 131, and the third feeding point 310.

[0111] It can be understood that the above-mentioned first GPS antenna and Beidou transmitting antenna are middle frame antennas and share a middle frame radiator, except that the feeding positions are different. The second GPS antenna is an antenna made on the bottom case.

[0112] In some embodiments of the present application, the above-mentioned first feeding point 121 can be electrically connected to a second fixed end 1420 of a second switching element 1400 arranged on the circuit board 200 through a second metal elastic sheet 610. Correspondingly, the above-mentioned second feeding point 131 can be electrically connected to a second fixed end 1420 of a second switching element 1400 arranged on the circuit board 200 through a third metal elastic sheet 620. The above-mentioned third feeding point 310 can be electrically connected to a second fixed end 1420 of a second switching element 1400 arranged on the circuit board 200 through a fourth metal elastic sheet.

[0113] In this embodiment, the first moving end 1310 is electrically connected to the second moving end 1410, and the transmitting end of the first radio frequency circuit 1100, the second radio frequency circuit 1200, and the receiving end of the second radio frequency circuit 1200 are electrically connected to the three first fixed ends 1320 in one-to-one correspondence; the first feeding point 121, the second feeding point 131, and the third feeding point 310 are electrically connected to the three second fixed ends 1420 in one-to-one correspondence. In this way, by controlling the conduction states of the first switching element 1300 and the second switching element 1400, one antenna can be selected from the first GPS antenna, the second GPS antenna, and the Beidou transmitting antenna as the receiving antenna for Beidou satellites according to three dimensions of antenna efficiency, polarization characteristics, and direction, which is beneficial to improving the antenna quality of the receiving antenna for Beidou satellites. At the same time, based on this circuit connection structure, a GPS antenna with a suitable radiation pattern can be selected to work according to the usage scenario. Specifically, by controlling the conduction states of the first switching element 1300 and the second switching element 1400, the reconfigurability of the radiation pattern of the GPS antenna can be realized. At the same time, by switching the feeding points of the switching element switching frame 100, the circular polarization rotation direction of the watch antenna can be switched, satisfying the coexistence of the GPS positioning system and the Beidou short message function antenna, and greatly improving the antenna receiving and transmitting capabilities of the two systems, that is, the reconfigurability of the circular polarization rotation direction can be realized, greatly enhancing the user's GPS positioning experience and satellite communication experience. Figure Three Shown is the efficiency of the first GPS antenna, and the efficiency is -12.8 dB.

[0114] Figure 6 Shown is the radiation pattern of the first GPS antenna, and the first GPS antenna generates a radiation pattern perpendicular to the watch face. Figure 7 Shown is the efficiency of the second GPS antenna, and the efficiency is -10 dB. Figure 8 Shown is the radiation pattern of the second GPS antenna, and the second GPS antenna generates a radiation pattern perpendicular to the watch face. Figure 9It is the radiation pattern of the second GPS antenna, generating an omnidirectional radiation pattern in the horizontal direction. Figure 10 and Figure 11 and Figure 12 are respectively the 2D cross-sectional comparison diagrams of Phi = 0°, Phi = 90 degrees, and Theta = 90°. It can be seen from the comparison that due to the complementary radiation patterns of the two antennas, by selecting the optimal radiation pattern, the optimal antenna can be selected in each direction. The gain in some directions is about 10 dB, which can greatly improve the GPS experience of users in various scenarios. For example, in the cycling state, select the first GPS antenna to generate a radiation pattern perpendicular to the dial, and in the walking scenario, select the second GPS antenna to generate a horizontal omnidirectional radiation pattern, so that in any scenario, the optimal antenna is selected, making the radiation pattern of the antenna face the sky and improving the GPS positioning experience of users. Among them, Figures 10 to 12 in, the middle frame antenna refers to the above-mentioned first GPS antenna, and correspondingly, the bottom case antenna refers to the above-mentioned second GPS antenna.

[0115] Figure 13 As shown, when feeding power at the 1 o'clock direction, the middle frame antenna is right-handed circular polarization and serves as the first GPS antenna. Figure 14 As shown, when feeding power at the 11 o'clock direction, it is left-handed circular polarization and serves as the transmitting antenna for Beidou satellite communication.

[0116] Figure 15 is the isolation degree of the two antennas. Figure 16 is the electric field cross-sectional diagram of the first GPS antenna, and its main radiation is generated by the gap between the middle frame and the screen 900. Figure 17 is the electric field cross-sectional diagram of the second GPS antenna, and the main radiation depends on the entire watch metal and the human body. Among them, the watch metal can include the metal middle frame, battery 800, PCB, etc. Among them, the human body acts as the ground of the antenna, thus greatly increasing the aperture of the antenna and making the efficiency of the second GPS antenna higher. Figure 18 is the comparison of the electric field cross-sections of the two antennas. Figure 19 is the current distribution of the first GPS antenna. Figure 20 is the current distribution of the second GPS antenna.

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

[0118] In this embodiment, by adopting the FPC form and attaching it to the inner wall of the insulating bottom case 700 to form the annular radiator 300, in this way, it is beneficial to simplify the design form of the antenna and reduce the cost.

[0119] Optionally, the annular radiator 300 is provided with at least one notch 330.

[0120] Please refer to Figure 24 In some embodiments of the present application, a plurality of notches 330 may be formed on the outer edge of the annular radiator 300 and arranged at intervals along the axial direction of the annular radiator 300. At the same time, a plurality of notches 330 may also be formed on the inner edge of the annular radiator 300 and arranged at intervals along the axial direction of the annular radiator 300. Among them, the notch 330 is a strip-shaped notch 330 arranged along the radial direction of 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, the second FPC can be prevented from wrinkling, so that the second FPC can closely fit the inner wall of the insulating bottom case 700.

[0122] Optionally, please refer to Figure 31 The annular radiator 300 is a conductive layer printed on the inner wall of the insulating bottom case 700.

[0123] In some embodiments of the present application, the above-mentioned annular radiator 300 may be a conductive layer formed by printing conductive silver paste on the inner wall of the insulating bottom case 700 by using a direct pad printing process (PrintingDirect Structure, PDS).

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

[0125] Optionally, please refer to Figure 33 The watch further includes a three-stage three-way 3P3T switch 1500. The 3P3T switch 1500 includes three first connection ends 1510 and three second connection ends 1520. Among the first connection ends 1510 and the second connection ends 1520, one is an input end and the other is an output end;

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

[0127] Please refer to Figure 33, the above three first connection terminals 1510 may be the three connection terminals on the left side of the 3P3T switch 1500. Correspondingly, the above three second connection terminals 1520 may be the three connection terminals on the right side of the 3P3T switch 1500. It can be understood that the 3P3T switch 1500 can conduct any one of the left connection terminals and one of the right connection terminals to form a conduction path. At this time, one of the first GPS antenna, the second GPS antenna, and the Beidou transmitting antenna is in the working state. In addition, the 3P3T switch 1500 can conduct two of the left connection terminals and two of the right connection terminals to form two conduction paths. At this time, two of the first GPS antenna, the second GPS antenna, and the Beidou transmitting antenna are in the working state. The 3P3T switch 1500 can also conduct three of the left connection terminals and three of the right connection terminals to form three conduction paths. At this time, the first GPS antenna, the second GPS antenna, and the Beidou transmitting antenna are all in the working state.

[0128] It can be understood that in the embodiments of the present application, according to the actual scenario requirements, based on the 3P3T switch 1500, 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 to meet the requirements of different scenarios.

[0129] 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, the receiving end of the second radio frequency circuit 1200 to the three first connection terminals 1510 in one-to-one correspondence; the first feeding point 121, the second feeding point 131, the third feeding point 310 are electrically connected to the three second connection terminals 1520 in one-to-one correspondence. In this way, by controlling the conduction state of the 3P3T switch 1500, 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 to meet the requirements of different scenarios.

[0130] Optionally, please refer to Figure 34 , the watch further includes a first combiner 1600 and a third switch 1700. The third switch 1700 includes a third moving end 1710 and three third fixed ends 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 feeding point 121, the second feeding point 131, the third feeding point 310 are electrically connected to the three third fixed ends 1720 in one-to-one correspondence.

[0132] Among them, please refer to Figure 34The one-to-one corresponding electrical connection between the first feeding point 121, the second feeding point 131, the third feeding point 310 and the three third fixed terminals 1720 means that the three second fixed terminals 1420 of the third switching element 1700 are respectively connected to the first feeding point 121, the second feeding point 131, and the third feeding point 310.

[0133] The above-mentioned first combiner 1600 can transmit the RF signals of the transmitting end of the first RF circuit 1100, the second RF circuit 1200, and the receiving end of the second RF circuit 1200 simultaneously or separately. Correspondingly, the third switching element 1700 is a single-pole triple-throw switch, and the third switching element 1700 can conduct the third moving terminal 1710 and any one of the third fixed terminals 1720.

[0134] In this embodiment, by electrically connecting the transmitting end of the first RF circuit 1100, the second RF circuit 1200, and the receiving end of the second RF circuit 1200 to the third moving terminal 1710 through the first combiner 1600 respectively; the first feeding point 121, the second feeding point 131, and the third feeding point 310 are electrically connected to the three third fixed terminals 1720 in a one-to-one correspondence. In this way, by controlling the conduction state of the third switching element 1700, one of the first GPS antenna, the second GPS antenna, and the Beidou transmitting antenna can be put into the working state to adapt to different working scenarios.

[0135] Optionally, please refer to Figure 35 The watch further includes a second combiner 1800 and a fourth switching element 1900. The fourth switching element 1900 includes a fourth moving terminal 1910 and two fourth fixed terminals 1920;

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

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

[0138] In this embodiment, by electrically connecting the first radio frequency circuit 1100 to the fourth moving end 1910, the first feeding point 121 and the second feeding point 131 are electrically connected to the two fourth fixed ends 1920 in one-to-one correspondence. The transmitting end and the receiving end of the second radio frequency circuit 1200 are respectively electrically connected to the third feeding point 310 through the second combiner 1800. In this way, by controlling the conduction state of the fourth switching element 1900, the first radio frequency circuit 1100 can be conducted to the first GPS antenna or the second GPS antenna, so as to realize the reconfigurability of the GPS antenna pattern. Correspondingly, the above-mentioned first combiner 1600 can transmit the radio frequency signals of the transmitting end and the receiving end of the second radio frequency circuit 1200 simultaneously or separately to realize the transceiver function of the Beidou antenna. It can be understood that the Beidou antenna can work simultaneously with the GPS antenna, or they can also work separately, and there is no limitation in this regard.

[0139] Optionally, a first groove is formed in the inner wall of the second frame area 160. The first groove is located at the middle position in the length direction of the second frame area 160. The thickness of the frame 100 at the first groove ranges from 0.1 mm to 0.5 mm, and the dimension of the first groove along the length direction of the second frame area 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. A second groove is formed in the inner wall of the fourth frame area 180. The second groove is located at the middle position in the length direction of the fourth frame area 180. The thickness of the frame 100 at the second groove ranges from 0.1 mm to 0.5 mm, and the dimension of the second groove along the length direction of the fourth frame area 180 ranges from 1 mm to 10 mm.

[0141] In some embodiments of the present application, the above-mentioned first groove may be located at the 12 o'clock direction of the watch. Correspondingly, the above-mentioned second groove may be located at the 6 o'clock direction 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 in the figure, by cutting off parts of the metal middle frame at the 12 o'clock and 6 o'clock directions of the middle frame to form the first groove and the second groove, such a setting can achieve the goal of neither changing the unique identifier (ID) of the watch nor its appearance, while improving the right-handed circular polarization component of the first GPS antenna and enhancing the GPS positioning experience. Among them, the thickness of the cut-off part of the metal middle frame at the 12 o'clock direction is 0.1 mm to 0.5 mm, and the width is 1 mm - 10 mm, which can be flexibly adjusted according to the structure and the situation of dispensing glue, making the length of the metal middle frame in the length direction longer. By perturbing the way, the ratio of the current paths in the length direction and the width direction of the metal middle frame is changed, thereby changing the phase difference between the two modes in the length direction and the width direction of the excited middle frame, and further optimizing the circular polarization and enhancing the right-handed circular polarization component. Similarly, parts of the metal middle frame at the 6 o'clock direction can also be cut off. Or, parts of the middle frame metal at the 12 o'clock and 6 o'clock directions can be cut off simultaneously.

[0143] Among them, from Figure 26 it can be seen that in the embodiment of the present application, by cutting off part of the metal middle frame at the 12 o'clock direction, the right-handed circular polarization can be enhanced. From Figure 27 it can be seen that in the embodiment of the present application, by cutting off part of the metal middle frame at the 12 o'clock direction, the axial ratio of 3 dB can be improved. Figure 28 It can be seen that in the embodiment of the present application, by cutting off part of the metal middle frame at the 6 o'clock direction, the right-handed circular polarization is further improved. Figure 29 It can be seen that in the embodiment of the present application, by cutting off part of the metal middle frame at the 6 o'clock direction, the axial ratio of 1.8 dB can be improved. Figure 30 It can be seen that in the embodiment of the present application, by cutting off parts of the metal middle frame at the 6 o'clock and 12 o'clock directions, the antenna efficiency remains basically unchanged, and the right-handed component is increased by 0.5 dB, that is, the right-handed circular polarization component can be enhanced, the axial ratio can be improved, and the left-handed circular polarization component can be suppressed.

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

[0145] 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 of embodiments without departing from the purpose of the present application and the scope protected by the claims. These embodiments are all within the protection scope of the present application.

Claims

1. A watch, characterized in that: The invention comprises a frame and a circuit board, wherein the frame is arranged around the circuit board, and the outer side wall of the circuit board is opposite to the inner side wall of the frame; the frame comprises a first strap connection position and a second strap connection position, the first strap connection position comprises a first lug and a second lug arranged at intervals along the frame, the second strap connection position comprises a third lug and a fourth lug arranged at intervals along the frame, the first lug is arranged symmetrically with respect to the center of the fourth lug, the second lug is arranged symmetrically with respect to the center of the third lug, the frame region connected to the first lug is provided with a first feeding point, and the frame region connected to the second lug is provided with a second feeding point; 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, and 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 comprises a first radio frequency circuit and a second radio frequency circuit, the first radio frequency circuit is electrically connected to the first feeding point, and the second radio frequency circuit is electrically connected to the second feeding point; When the frame is connected to the first antenna signal from the first radio frequency circuit, the first antenna signal sequentially excites a first resonance mode of the first frame area and a second resonance mode of the second frame area, wherein an angle exists between a phase of the first resonance mode and a phase of the second resonance mode, so that the frame generates a first circular polarization; When the frame is connected to the second antenna signal from the second RF circuit, the second antenna signal sequentially excites the third resonance mode of the second frame area and the fourth resonance mode of the third frame area, wherein an angle exists between the phase of the third resonance mode and the phase of the fourth resonance 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 RF circuit is the RF circuit of the first antenna, the second RF circuit is the RF circuit of the second antenna, the operating frequency bands of the first antenna and the second antenna are both in the first frequency band, and the circumference 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 body is a non-break frame body structure, and the shape of the frame body is rectangular or circular.

4. The watch according to claim 3, characterized in that: When the frame is rectangular in shape, the first frame area, the second frame area and the third frame area are respectively areas where three sequentially connected borders of the frame are located, 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 frame of the first frame area ranges from 43 mm to 50 mm, and the length of the frame of the second frame area ranges from 35 mm to 40 mm.

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

7. The watch according to claim 6, characterized in that: The third feeding point is located in the annular radiator at a position directly opposite to the first feeding point.

8. The watch according to claim 6, characterized in that: The watch also includes a first flexible circuit board FPC, which is arranged opposite to the third frame area and coupled to the third frame area, and one end of the first FPC facing the second feeding 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 comprises at least two grounding points, and the at least two grounding points are arranged at intervals along the edge of the annular radiator; The first RF circuit is the RF circuit of the first antenna, the operating frequency band of the first antenna is the first frequency band, the third feeding point is located at the edge of the annular radiator, the grounding point closest to the third feeding point among the at least two grounding points is the first grounding point, and the distance between the first grounding point and the third feeding 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 further comprises a first switch element and a second switch element, wherein the first switch element comprises a first movable end and three first stationary ends, and the second switch element comprises a second movable end and three second stationary ends; The first moving end is electrically connected to the second moving end, the first RF circuit, the transmitting end of the second RF circuit, and the receiving end of the second RF circuit are electrically connected to the three first fixed ends in a one-to-one correspondence; the first feeding point, the second feeding point, and the third feeding point are electrically connected to the three second fixed ends in a one-to-one correspondence.

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 bottom shell.

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

13. The watch according to claim 6, characterized in that: The watch further comprises a three-level three-way 3P3T switch, wherein the 3P3T switch comprises three first connection terminals and three second connection terminals, wherein one of the first connection terminals and the second connection terminals is an input terminal and the other is an output terminal; The first RF circuit, the transmitting end of the second RF circuit, and the receiving end of the second RF circuit are electrically connected to the three first connection ends in a one-to-one correspondence; the first feeding point, the second feeding point, and the third feeding point are electrically connected to the three second connection ends in a one-to-one correspondence.

14. The watch according to claim 6, characterized in that The watch further comprises a first combiner and a third switch element, wherein the third switch element comprises a third movable end and three third fixed ends; The transmitting end of the first RF circuit, the transmitting end of the second RF circuit, and the receiving end of the second RF circuit are electrically connected to the third moving end through the first combiner respectively; the first feeding point, the second feeding point, and the third feeding point are electrically connected to the three third fixed ends in a one-to-one correspondence.

15. The watch according to claim 6, characterized in that The watch further comprises a second combiner and a fourth switch element, wherein the fourth switch element comprises a fourth moving end and two fourth fixed ends; The first RF circuit is electrically connected to the fourth moving end, the first feeding point and the second feeding point are electrically connected to the two fourth fixed ends in a one-to-one correspondence, and the transmitting end of the second RF circuit and the receiving end of the second RF circuit are electrically connected to the third feeding point through the second combiner, respectively.

16. A 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 region, the first groove is located in the middle of the length direction of the second frame region, the thickness of the frame at the first groove ranges from 0.1 mm to 0.5 mm, and the dimension of the first groove along the length direction of the second frame region 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, and a second groove is provided on the inner wall of the fourth frame area. The second groove is located in the middle position of the length direction of the fourth frame area, and the thickness of the frame at the second groove ranges from 0.1 mm to 0.5 mm. The size of the second groove along the length direction of the fourth frame area ranges from 1 mm to 10 mm.

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