Watch

Abstract

The invention discloses a watch, and relates to the technical field of electronic products. The watch comprises a reflector antenna and a connecting shaft, the reflector antenna comprises a feed source assembly and an arc-shaped reflector plate, the circle center of the arc-shaped reflector plate is located at the central axis of the watch, and the radiation end of the feed source assembly faces the arc-shaped reflector plate; the feed source assembly is arranged at the position of the center shaft, the feed source assembly can rotate around the center shaft, the feed source assembly is fixedly connected with the arc-shaped reflector plate through the connecting shaft, and the arc-shaped reflector plate can rotate around the center shaft under the action of the gravity of the arc-shaped reflector plate. When the arc-shaped reflector plate rotates around the central shaft, the arc-shaped reflector plate drives the feed source assembly to rotate synchronously through the connecting shaft.

Description

Technical Field

[0001] This application relates to the technical field of electronic products, and more particularly to a watch. Background Art

[0002] With the rapid popularization of wearable devices, as a portable terminal integrating functions such as health monitoring, sports tracking, and mobile communication, the wireless communication performance of smart watches directly depends on the design and optimization of antennas. Driven by the requirements of miniaturization and multi-functionality, smart watch antenna technology has evolved from external components to highly integrated forms. Early smart watches mostly used simple single-band antennas, such as Bluetooth antennas. However, with the integration of multi-mode communications such as cellular networks, Wireless Fidelity (Wi-Fi), Global Positioning System (GPS), and Near Field Communication (NFC), antenna design faces multiple challenges, such as space limitations, human body near-field interference, multi-band compatibility, and energy efficiency optimization, etc.

[0003] Currently, wearable watch devices mainly use the form of a slotted inverted-F antenna (IFA), and the radiation of electromagnetic waves is achieved through the slot. This antenna form is often difficult to achieve omnidirectional coverage, which inevitably leads to unpredictable situations in the optimal radiation direction of the antenna when the user makes some changes while wearing the watch. For example, when the user looks at the watch, the arm is parallel to the horizontal plane, and the slot radiation direction is also the horizontal plane; when the user walks or exercises, the arm is perpendicular to the horizontal plane, and the radiation direction is towards the ground, etc.

[0004] Currently, the most common function of smart watches is high-speed communication, and this function has strong requirements for the radiation ability of the antenna itself. In the case of traditional solutions, when the user's usage method is uncertain, it is difficult to unify the radiation direction of the antenna. In this way, there will be strong path loss in the antenna in some scenarios in the smart watch. For example, when the radiation direction of the antenna in the smart watch is towards the ground, it will bring strong path loss. It can be seen that in the related art, there is a problem that the path loss of the antenna in the smart watch is too high in some usage scenarios. Summary of the Invention

[0005] This application provides a watch, which is beneficial to reducing the path loss of the antenna in the watch.

[0006] In a first aspect, this application provides a watch, including: a reflector antenna and a connecting shaft, the reflector antenna includes a feed component and an arc-shaped reflector, the center of the arc-shaped reflector is located on the central axis of the watch, and the radiation end of the feed component faces the arc-shaped reflector;

[0007] The feed component is disposed at the central axis, and the feed component can rotate around the central axis. The feed component is fixedly connected to the arc-shaped reflector through the connecting shaft, and the arc-shaped reflector can rotate around the central axis under the action of its own gravity. During the rotation of the arc-shaped reflector around the central axis, the arc-shaped reflector drives the feed component to rotate synchronously through the connecting shaft.

[0008] In the embodiment of the present application, since the center of the arc-shaped reflector is located at the central axis of the watch, and at the same time, the feed component is disposed at the central axis, and the radiation end of the feed component faces the arc-shaped reflector, therefore, the radiation end of the feed component faces the concave surface of the arc-shaped reflector. And the feed component is fixedly connected to the arc-shaped reflector through the connecting shaft. During the rotation of the arc-shaped reflector around the central axis, the arc-shaped reflector drives the feed component to rotate synchronously through the connecting shaft. In this way, the radiation end of the feed component can always face the concave surface of the arc-shaped reflector. At the same time, since the arc-shaped reflector can rotate around the central axis under the action of its own gravity, and the feed component is disposed at the central axis of the watch, the arc-shaped reflector can move to the lower part of the radiation end of the feed component under the action of its own gravity. In this way, during the operation of the reflector antenna, since the arc-shaped reflector can be automatically adjusted to the lower part of the radiation end of the feed component, and the concave surface of the arc-shaped reflector can reflect the electromagnetic waves radiated by the radiation end, and the electromagnetic waves reflected by the concave surface of the arc-shaped reflector face upward, it can be ensured that the main radiation direction of the reflector antenna always faces upward, avoiding the problem of path loss caused by ground reflection, which is beneficial to reducing the path loss of the antenna in the watch. Description of the Drawings

[0009] Figure 1 is a schematic diagram of the internal structure of the watch in the embodiment of the present application;

[0010] Figure 2 is one of the cross-sectional views of the watch in the embodiment of the present application;

[0011] Figure 3 is a partial schematic diagram of the connection between the feeding component and the conductive shaft in the embodiment of the present application;

[0012] Figure 4 is the second cross-sectional view of the watch in the embodiment of the present application. Detailed Embodiments

[0013] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0014] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same category, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally indicates an "or" relationship between the associated objects before and after.

[0015] Next, a watch provided by the embodiments of the present application will be described in detail in conjunction with the accompanying drawings, through specific embodiments and their application scenarios.

[0016] Please refer to Figures 1 to Figure 4 , the embodiments of the present application provide a watch, including: a reflector antenna 100 and a connecting shaft 200. The reflector antenna 100 includes a feed component 110 and an arc-shaped reflector 120. The center of the arc-shaped reflector 120 is located at the central axis 700 of the watch, and the radiation end 111 of the feed component 110 faces the arc-shaped reflector 120;

[0017] The feed component 110 is arranged at the central axis 700 of the watch, and the feed component 110 can rotate around the central axis 700. The feed component 110 is fixedly connected to the arc-shaped reflector 120 through the connecting shaft 200, and the arc-shaped reflector 120 can rotate around the central axis 700 under the action of its own gravity. During the rotation of the arc-shaped reflector 120 around the central axis 700, the arc-shaped reflector 120 drives the feed component 110 to rotate synchronously through the connecting shaft 200.

[0018] Among them, the watch can be various types of smart watches.

[0019] Please refer to Figure 1 , the above-mentioned arc-shaped reflector 120 includes a parabolic surface 121. The parabolic surface 121 is the concave surface of the arc-shaped reflector 120, and the radiation end 111 of the feed component 110 faces the parabolic surface 121. The parabolic surface 121 is also called the reflector surface.

[0020] It can be understood that the above feed component 110 is fixedly connected to the paraboloid 121 of the arc-shaped reflector 120 through the connecting shaft 200. Since the center of the arc-shaped reflector 120 is located at the central axis 700 of the watch, and at the same time, the feed component 110 is arranged at the central axis 700, and the radiation end 111 of the feed component 110 faces the arc-shaped reflector 120, therefore, the radiation end 111 of the feed component 110 is opposite to the paraboloid 121 of the arc-shaped reflector 120. And the feed component 110 is fixedly connected to the arc-shaped reflector 120 through the connecting shaft 200. During the process of the arc-shaped reflector 120 rotating around the central axis 700, the arc-shaped reflector 120 drives the feed component 110 to rotate synchronously through the connecting shaft 200. In this way, the radiation end 111 of the feed component 110 can always face the paraboloid 121.

[0021] During the operation of the reflector antenna 100, the feed component 110 radiates electromagnetic waves to the paraboloid 121. After the electromagnetic waves are transmitted to the paraboloid 121, they are reflected by the paraboloid 121 and propagated to the outside. Among them, Figure 1 the dotted line structure in it is the schematic of the propagation path of the electromagnetic wave.

[0022] The above feed component 110 can be electrically connected to the circuit board inside the watch. Specifically, the feed component 110 can be electrically connected to the radio frequency circuit in the circuit board. In this way, the feed component 110 can access the radio frequency signal from the radio frequency circuit and radiate the accessed radio frequency signal in the form of electromagnetic waves to the outside.

[0023] It can be understood that during the process of the arc-shaped reflector 120 rotating around the central axis 700 under the action of its own gravity and the feed component 110 rotating accordingly, the feed component 110 is always located at the central axis 700. Among them, the feed component 110 can be rotatably installed at the central axis 700.

[0024] It should be noted that since the arc-shaped reflector 120 can rotate around the central axis 700 under the action of its own gravity, therefore, the arc-shaped reflector 120 is always located below the central axis 700 under the action of its own gravity. And the feed component 110 is arranged at the central axis 700 of the watch, and the radiation end 111 of the feed component 110 always faces the paraboloid 121. Therefore, the paraboloid 121 can always be located below the radiation end 111 of the feed component 110.

[0025] The operating frequency band of the above-mentioned reflector antenna 100 can be set as required. In some embodiments of the present application, the operating frequency band of the reflector antenna 100 is the millimeter-wave band. For example, it can be the fifth-generation mobile communication technology (5G) millimeter-wave bands commonly used in the 3rd Generation Partnership Project (3GPP) standards such as the n257 band (26.5 GHz - 29.5 GHz) and the n260 band (37G - 40 GHz).

[0026] It can be understood that the radiation end 111 of the above-mentioned feed component 110 is the main radiation direction of the feed component 110. In the embodiments of the present application, by making the radiation end 111 of the feed component 110 always face the parabolic surface 121, the transmission loss of the reflector antenna 100 can be further reduced.

[0027] In this embodiment, since the center of the arc-shaped reflector 120 is located on the central axis 700 of the watch, and at the same time, the feed component 110 is arranged on the central axis 700, and the radiation end 111 of the feed component 110 faces the arc-shaped reflector 120, therefore, the radiation end 111 of the feed component 110 is opposite to the concave surface of the arc-shaped reflector 120. And the feed component 110 is fixedly connected to the arc-shaped reflector 120 through the connecting shaft 200. During the rotation of the arc-shaped reflector 120 around the central axis 700, the arc-shaped reflector 120 drives the feed component 110 to rotate synchronously through the connecting shaft 200. In this way, the radiation end 111 of the feed component 110 can always face the parabolic surface 121. At the same time, since the arc-shaped reflector 120 can rotate around the central axis 700 under the action of its own gravity, and the feed component 110 is arranged on the central axis 700 of the watch, therefore, the arc-shaped reflector 120 can adjust the parabolic surface 121 to be below the radiation end 111 of the feed component 110 under the action of its own gravity. In this way, during the operation of the reflector antenna 100, since the parabolic surface 121 can be automatically adjusted to be below the radiation end 111 of the feed component 110, and the parabolic surface 121 can reflect the electromagnetic waves radiated by the radiation end 111, and the electromagnetic waves reflected by the parabolic surface 121 face upward, so that the main radiation direction of the reflector antenna 100 can always face upward, that is, the maximum radiation direction is always in the upper hemisphere region, avoiding the problem of path loss caused by ground reflection, which is beneficial to reducing the path loss of the antenna in the watch.

[0028] Optionally, the feed component 110 includes a feed body 112 and a conductive knob 113, and the feed body 112 is fixedly connected to the conductive knob 113;

[0029] The watch further includes a circuit board and a conductive shaft 600. The axis of the conductive shaft 600 is the central axis 700. One end of the conductive shaft 600 is electrically connected to the circuit board, and the other end of the conductive shaft 600 is rotatably connected to the conductive knob 113. The conductive knob 113 is fixedly connected to the arc-shaped reflector 120 through the connecting shaft 200.

[0030] Wherein, the conductive shaft 600 can be fixedly connected to the circuit board, or the conductive shaft 600 can also be fixedly connected to the bottom case of the watch. The above-mentioned feed source body 112 is fixedly connected to the conductive knob 113, and the feed source body 112 is electrically conductive with the conductive knob 113.

[0031] The above-mentioned feed source body 112 can be an oscillator or an oscillator array, or a horn or a horn array, etc. The above-mentioned conductive knob 113 can be a twistable connector for connecting the feed source body 112 and the conductive shaft 600, and this connector can ensure that the feed source body 112 can rotate around the above-mentioned central axis 700.

[0032] It can be understood that the radio frequency signal output by the above-mentioned radio frequency circuit can be transmitted to the feed source body 112 through the conductive shaft 600 and the conductive knob 113 in sequence, and is output in the form of electromagnetic waves by the feed source body 112.

[0033] The above-mentioned feed source assembly 110 is fixedly connected to the parabolic surface 121 through the connecting shaft 200 specifically means that: the conductive knob 113 in the feed source assembly 110 is fixedly connected to the parabolic surface 121 through the connecting shaft 200. During the rotation of the arc-shaped reflector 120 around the central axis 700, the arc-shaped reflector 120 drives the conductive knob 113 to rotate around the conductive shaft 600 through the connecting shaft 200, and the feed source body 112 rotates synchronously with the conductive knob 113, and the conductive shaft 600 remains stationary.

[0034] The above-mentioned connection that the other end of the conductive shaft 600 is rotatably connected to the conductive knob 113 can mean that: the end of the conductive shaft 600 is embedded in the shaft hole of the conductive knob 113. At this time, the conductive knob 113 can rotate around the axis of the conductive shaft 600. Or, a shaft hole can be opened at the end of the conductive shaft 600, and the conductive knob 113 can be embedded in the shaft hole at the end of the conductive shaft 600. At this time, the conductive knob 113 can rotate around the axis of the conductive shaft 600. Or, the end of the conductive shaft 600 is connected to the conductive knob 113 through various types of rotating connectors, which can be specifically set according to needs. Please refer to Figure 3, in some embodiments of the present application, the end of the conductive shaft 600 is embedded in the shaft hole of the conductive knob 113, that is, the conductive knob 113 is sleeved on the end of the conductive shaft 600.

[0035] In this embodiment, by making the feed component 110 include a feed body 112 and a conductive knob 113, the feed body 112 is fixedly connected to the conductive knob 113, one end of the conductive shaft 600 is electrically connected to the circuit board, the other end of the conductive shaft 600 is rotatably connected to the conductive knob 113, and the conductive knob 113 is fixedly connected to the arc-shaped reflector 120 through the connecting shaft 200. Thus, during the rotation of the arc-shaped reflector 120 around the central axis 700, the arc-shaped reflector 120 can drive the feed component 110 to rotate around the conductive shaft 600 through the connecting shaft 200, which is beneficial to ensuring that the radiation end 111 of the feed component 110 always faces the arc-shaped reflector 120.

[0036] Optionally, the conductive knob 113 is cylindrical, and the axis of the conductive knob 113 is the central axis 700. The length of the conductive knob 113 is 1 / 4λ, and the characteristic impedance value of the conductive knob 113 is Wherein, the conductive shaft 600 is a coaxial cable, λ is the dielectric wavelength of the insulating medium in the conductive shaft 600, Z1 is the characteristic impedance value of the conductive shaft 600, and Z2 is the characteristic impedance value of the feed body 112.

[0037] Wherein, the above-mentioned characteristic impedance value is the impedance value of the characteristic impedance. Among them, the characteristic impedance is an inherent characteristic of the radio frequency transmission line that affects the amplitude and phase changes of the radio wave voltage and current, and is equal to the ratio of the voltage to the current at each point.

[0038] In some embodiments of the present application, in addition to enabling the feed body 112 to rotate around the central axis 700, the above-mentioned conductive knob 113 can also achieve impedance matching between the feed body 112 and the conductive shaft 600 according to the 1 / 4 impedance transformer principle.

[0039] Wherein, the above-mentioned coaxial cable generally includes four layers from the inside to the outside: a central conductor, an insulating layer, a shielding layer, and an outer skin. Among them, the central conductor can be a conductive copper wire, the insulating layer is usually a plastic layer covering the surface of the central conductor, the shielding layer is usually a mesh conductive body covering the surface of the insulating layer, and the outer skin is an insulating material layer covering the outside of the shielding layer. The above-mentioned λ can be the dielectric wavelength of the dielectric in the insulating layer of the conductive shaft 600. It can be understood that the above-mentioned conductive shaft 600 can conduct the circuit board and the conductive knob 113 through the central conductor.

[0040] In some embodiments of the present application, the length L of the conductive knob 113 is 1 / 4λ, where the length of the conductive knob 113 is the height of the conductive knob 113, that is, the dimension of the conductive knob 113 along the central axis 700 direction. The characteristic impedance value of the conductive knob 113

[0041] It can be understood that since L = 1 / 4λ, therefore, by changing the dielectric wavelength of the insulating medium in the insulating layer of the conductive shaft 600, the shortening of L can be achieved, which is beneficial to be applicable to thinner watches.

[0042] In this embodiment, since the length of the conductive knob 113 is 1 / 4λ, the characteristic impedance value of the conductive knob 113 is In this way, the impedance matching between the feed body 112 and the conductive shaft 600 can be achieved through the conductive knob 113.

[0043] Optionally, please refer to Figure 3 , the feed body 112 is a horn-shaped feed body 112, and the radiation end 111 is the open end of the feed body 112.

[0044] It can be understood that the feed body 112 can be a hollow horn-shaped structure.

[0045] In this embodiment, by making the feed body 112 be a horn-shaped feed body 112 and the radiation end 111 be the open end of the feed body 112, in this way, the main radiation direction of the feed body 112 can be its radiation end 111, and the radiator of the feed body 112 always faces the parabolic surface 121. Therefore, the main radiation direction of the feed body 112 can always face the parabolic surface 121, which is beneficial to reducing the transmission loss of the reflector antenna 100.

[0046] Optionally, the watch further includes a dielectric plate 300. The dielectric plate 300 is located between the feed assembly 110 and the arc-shaped reflector 120. The dielectric plate 300 includes at least two dielectric layers. The at least two dielectric layers are stacked along the extension direction of the central axis 700. Among the at least two dielectric layers, the dielectric constants of different dielectric layers are different;

[0047] The reflector antenna 100 includes at least two operating frequency bands corresponding to the at least two dielectric layers one by one;

[0048] In the at least two operating frequency bands, the center frequency point of each operating frequency band is equal to the dielectric wavelength in the corresponding dielectric layer.

[0049] It can be understood that the electromagnetic waves output by the above feed component 110 need to be propagated through the dielectric plate 300 to the parabolic surface 121. Among them, each dielectric layer in the dielectric plate 300 can be used to propagate the electromagnetic waves output by the feed component 110.

[0050] Among the above at least two operating frequency bands, the condition that the center frequency points of each operating frequency band have equal medium wavelengths in the corresponding dielectric layers can mean that: among the at least two operating frequency bands, the center frequency points of each operating frequency band have medium wavelengths of the first wavelength in the corresponding dielectric layers. Among them, the center frequency point of the first operating frequency band has a medium wavelength of the first wavelength in the dielectric layer corresponding to the first operating frequency band, and the first operating frequency band is any one of the at least two operating frequency bands.

[0051] Since the medium wavelength of the center frequency point of the above first operating frequency band in the corresponding dielectric layer can be expressed as: where λ0 represents the wavelength of the center frequency point of the first operating frequency band in a vacuum medium, and ε r is the dielectric constant of the dielectric layer corresponding to the first operating frequency band. And among at least two dielectric layers, the values of λ g are the same, and the values of ε r are different. Therefore, the corresponding λ0 values of each dielectric layer are different. λ0 corresponds to the operating frequency band, that is, different λ0 values mean different corresponding operating frequency bands. Therefore, by adjusting ε r the range of the corresponding operating frequency band can be changed. That is, by adjusting the dielectric constants of each dielectric layer, the reflector antenna 100 can operate at specific at least two operating frequency bands, and by controlling the number of dielectric layers included in the dielectric plate 300, the number of operating frequency bands of the reflector antenna 100 can be changed.

[0052] In this embodiment, by making the watch further include a dielectric plate 300, the dielectric plate 300 is located between the feed component 110 and the arc-shaped reflector 120. The dielectric plate 300 includes at least two dielectric layers, and the at least two dielectric layers are stacked along the extending direction of the central axis 700. Among the at least two dielectric layers, the dielectric constants of different dielectric layers are different; the reflector antenna 100 includes at least two operating frequency bands corresponding one-to-one to the at least two dielectric layers; among the at least two operating frequency bands, the center frequency points of each operating frequency band have equal medium wavelengths in the corresponding dielectric layers. In this way, the reflector antenna 100 can operate at specific at least two operating frequency bands, that is, two or more different frequency bands can be integrated in the reflector antenna 100 to achieve multi-band operation.

[0053] Optionally, among the at least two operating frequency bands, the center frequency of each operating frequency band has a first wavelength in the corresponding dielectric layer, and the distance between the radiation end 111 and the parabolic surface 121 is one quarter of the first wavelength.

[0054] In this embodiment, by making the distance between the radiation end 111 and the parabolic surface 121 be one quarter of the first wavelength, in this way, it can be ensured that the reflector antenna 100 has good antenna performance in each of the at least two operating frequency bands.

[0055] Optionally, the at least two dielectric layers include a first dielectric layer 310 and a second dielectric layer 320. The dielectric constant of the first dielectric layer 310 is 2.7, and the operating frequency band corresponding to the first dielectric layer 310 is the n257 band;

[0056] The dielectric constant of the second dielectric layer 320 is 3.2, and the operating frequency band corresponding to the second dielectric layer 320 is the n260 band.

[0057] Wherein, the distance between the radiation end 111 and the parabolic surface 121 can be represented by R. When the watch is a circular watch, R can also be used as the radius of the watch.

[0058] In some embodiments of the present application, R = λ g / 4. The dielectric constant of the dielectric layer corresponding to the first operating frequency band should satisfy the following formula: Considering the commonly used 5G millimeter wave frequency bands n257 (26.5 GHz - 29.5 GHz) and n260 (37G - 40 GHz) in the current 3GPP standard, and the radius of a commonly used watch is about 4 cm, that is, R = 4 cm. Therefore, the relative dielectric constants of the two layers can be calculated respectively by the above formula. The first dielectric layer 310 is used for the n257 band, and a crystal material such as 5CB with a relative dielectric constant of 2.7 can be used. The second dielectric layer 320 is used for the n260 band, and polytetrafluoroethylene (PTFE) with a relative dielectric constant of 3.2 can be used. It should be noted that the first dielectric layer 310 and the second dielectric layer 320 in the embodiments of the present application are both examples. In fact, other dielectric layers can be added as needed, or the first dielectric layer 310 and the second dielectric layer 320 in this embodiment can be replaced by other dielectric layers.

[0059] In this embodiment, by making the at least two dielectric layers include a first dielectric layer 310 and a second dielectric layer 320, the dielectric constant of the first dielectric layer 310 is 2.7, and the operating frequency band corresponding to the first dielectric layer 310 is the n257 frequency band; the dielectric constant of the second dielectric layer 320 is 3.2, and the operating frequency band corresponding to the second dielectric layer 320 is the n260 frequency band. Thus, the operating frequency band of the reflector antenna 100 can include the n257 frequency band and the n260 frequency band.

[0060] Optionally, the dielectric plate 300 is the dial dielectric plate 300 of the watch.

[0061] It can be understood that the dial of the watch can be made in the dielectric plate 300.

[0062] In this embodiment, since the above dielectric plate 300 can be reused as the dial dielectric plate 300, thus, the dielectric plate 300 does not need to additionally occupy the internal space of the watch, which is beneficial to the miniaturization of the watch.

[0063] Optionally, the connecting shaft 200 is attached to the first end face 330 of the dielectric plate 300.

[0064] Wherein, the first end face 330 may be the end face of the dielectric plate 300 facing the bottom case of the watch.

[0065] In this embodiment, by making the connecting shaft 200 attached to the first end face 330 of the dielectric plate 300, thus, during the process that the arc-shaped reflector 120 rotates around the central axis 700 under the action of its own gravity, the connecting shaft 200 can rotate around the central axis 700 within the first end face 330. Due to the limiting effect of the dielectric plate 300, the connecting shaft 200 can be prevented from swinging towards the side of the dielectric plate 300, which is beneficial to enabling the arc-shaped reflector 120 to slide within a set area.

[0066] Optionally, the watch further includes a frame 500. There is an annular gap 400 between the dielectric plate 300 and the frame 500. The arc-shaped reflector 120 is disposed in the annular gap 400, and the arc-shaped reflector 120 can rotate around the central axis 700 along the annular gap 400 under the action of its own gravity.

[0067] It can be understood that the annular gap 400 can serve as a slide rail for the arc-shaped reflector 120, and the arc-shaped reflector 120 can rotate within a 360° range along the annular gap 400, that is, the arc-shaped reflector 120 can slide to any position of the annular gap 400.

[0068] In this embodiment, there is an annular gap 400 between the dielectric plate 300 and the frame 500. The arc-shaped reflector 120 is disposed in the annular gap 400, and the arc-shaped reflector 120 can rotate around the central axis 700 along the annular gap 400 under the action of its own gravity. In this way, the arc-shaped reflector 120 can rotate within a range of 360° in the annular gap 400, which is conducive to adjusting the parabolic surface 121 below the radiation end 111 of the feed component 110 in various postures of the watch.

[0069] Optionally, the connecting shaft 200 is an insulating shaft.

[0070] Among them, the connecting shaft 200 can be a rigid shaft made of various insulating materials. For example, it can be a plastic shaft.

[0071] In this embodiment, since the connecting shaft 200 is an insulating shaft, the influence of the connecting shaft 200 on the electromagnetic wave propagation process can be reduced, which is conducive to improving the antenna performance of the reflector antenna 100.

[0072] 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. Those of ordinary skill in the art can make many forms without departing from the spirit of the present application and the scope protected by the claims, and all of them fall within the protection scope of the present application.

Claims

1. A watch, characterized in that, Comprising: A reflector antenna and a connecting shaft, the reflector antenna comprising a feed component and an arc-shaped reflector, the center of the arc-shaped reflector being located on the central axis of the watch, and the radiation end of the feed component facing the arc-shaped reflector; The feed component is disposed on the central axis, and the feed component is rotatable about the central axis. The feed component is fixedly connected to the arc-shaped reflector through the connecting shaft, and the arc-shaped reflector is rotatable about the central axis under the action of its own gravity. During the rotation of the arc-shaped reflector about the central axis, the arc-shaped reflector drives the feed component to rotate synchronously through the connecting shaft.

2. The watch according to claim 1, characterized in that, The feed component comprises a feed body and a conductive knob, and the feed body is fixedly connected to the conductive knob; The watch further comprises a circuit board and a conductive shaft, the axis of the conductive shaft being the central axis. One end of the conductive shaft is electrically connected to the circuit board, and the other end of the conductive shaft is rotatably connected to the conductive knob. The conductive knob is fixedly connected to the arc-shaped reflector through the connecting shaft.

3. The watch according to claim 2, characterized in that, The conductive knob is cylindrical, and the axis of the conductive knob is the central axis. The length of the conductive knob is 1 / 4λ, and the characteristic impedance value of the conductive knob is Wherein, the conductive shaft is a coaxial cable, λ is the dielectric wavelength of the insulating medium in the conductive shaft, Z1 is the characteristic impedance value of the conductive shaft, and Z2 is the characteristic impedance value of the feed source body.

4. The watch according to claim 2, characterized in that, The feed body is a horn-shaped feed body, and the radiation end is the open end of the feed body.

5. The watch according to claim 1, characterized in that, The watch further comprises a dielectric plate, the dielectric plate being located between the feed component and the arc-shaped reflector. The dielectric plate comprises at least two dielectric layers, and the at least two dielectric layers are stacked along the extending direction of the central axis. Among the at least two dielectric layers, the dielectric constants of different dielectric layers are different; The reflector antenna comprises at least two operating frequency bands corresponding to the at least two dielectric layers one by one; Among the at least two operating frequency bands, the center frequency point of each operating frequency band has the same medium wavelength in the corresponding dielectric layer.

6. The watch according to claim 5, characterized in that, Among the at least two operating frequency bands, the center frequency point of each operating frequency band has a medium wavelength of a first wavelength in the corresponding dielectric layer, and the distance between the radiation end and the arc-shaped reflector is one quarter of the first wavelength.

7. The watch according to claim 5, characterized in that, The at least two dielectric layers comprise a first dielectric layer and a second dielectric layer, the dielectric constant of the first dielectric layer is 2.7, and the operating frequency band corresponding to the first dielectric layer is the n257 frequency band; The dielectric constant of the second dielectric layer is 3.2, and the operating frequency band corresponding to the second dielectric layer is the n260 frequency band.

8. The watch according to claim 5, characterized in that, The connecting shaft is in contact with the first end face of the dielectric plate.

9. The watch according to claim 5, characterized in that, The watch further comprises a housing, and there is an annular gap between the dielectric plate and the housing. The arc-shaped reflector is disposed in the annular gap, and the arc-shaped reflector is rotatable about the central axis along the annular gap under the action of its own gravity.

10. The watch according to any one of claims 1 to 9, characterized in that, The connecting shaft is an insulating shaft.

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