Wearable device

Abstract

The application provides a wearable device, comprising: a metal shell, the metal shell comprising a bottom wall and a side wall, the bottom wall and the side wall enclosing a first cavity and forming a first opening at an end of the side wall away from the bottom wall; a signal penetration part arranged at the first opening; a dial in contact with the signal penetration part, the signal penetration part being located between the metal shell and the dial; a feeding part arranged in the first cavity, the feeding part and the metal shell constituting a waveguide antenna, wherein, in the direction from the bottom wall to the first opening, the side wall is a stepped structure, and the area of the first opening is greater than the area of the bottom wall. In the embodiment of the application, the waveguide antenna can transmit electromagnetic waves through the signal penetration part, thereby realizing communication of the wearable device, and the stepped structure can increase the wave band of the waveguide antenna.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of electronic equipment, and particularly relates to a wearable device. BACKGROUND

[0002] In the related art, the antenna of the smart watch usually adopts an antenna type with low aperture efficiency such as a monopole antenna or a loop antenna, and due to the limited space of the smart watch, the gain and bandwidth of the antenna are poor, and the antenna pattern of the monopole antenna or the loop antenna is omnidirectional, so that part of the energy of the antenna is absorbed by the human body when the user wears the smart watch, thereby reducing the efficiency of the antenna. SUMMARY

[0003] The present application aims to provide a wearable device which can solve one of the problems of poor gain and bandwidth of the antenna of the smart watch.

[0004] To solve the above technical problems, the present application is implemented as follows:

[0005] In a first aspect, the present application provides a wearable device, comprising:

[0006] A metal shell, the metal shell comprising a bottom wall and a side wall, the bottom wall and the side wall enclosing a first cavity, and forming a first opening at one end of the side wall away from the bottom wall;

[0007] A signal penetration part arranged at the first opening;

[0008] A dial in contact with the signal penetration part, the signal penetration part being located between the metal shell and the dial;

[0009] A feeding part arranged in the first cavity, the feeding part and the metal shell constituting a waveguide antenna, wherein the side wall is a stepped structure in the direction from the bottom wall to the first opening, and the area of the first opening is greater than the area of the bottom wall.

[0010] In the embodiments of the present application, the wearable device comprises a metal shell, a signal penetration part, a dial and a feeding part, wherein the metal shell comprises a bottom wall and a side wall, the side wall is arranged on the periphery of the bottom wall, the side wall and the bottom wall enclose a first cavity with a first opening, the first opening corresponds to the bottom wall, the feeding part is arranged in the first cavity and connected with the metal shell, thereby the metal shell and the feeding part constitute a waveguide antenna, and the dial and the metal shell have the signal penetration part therebetween, the waveguide antenna can transmit electromagnetic waves through the signal penetration part, thereby realizing the communication of the wearable device.

[0011] Wherein, along the direction from the bottom wall of the metal shell to the first opening, the side wall is in a stepped structure, and the area of the first opening is greater than the area of the bottom wall, thereby the metal shell forms a horn structure with a small bottom and a large opening, and the stepped structure can increase the wave band of the waveguide antenna.

[0012] Moreover, the horn structure formed by the metal shell constitutes an aperture antenna, and the gain and bandwidth of the aperture antenna can be greatly improved compared with the monopole antenna and loop antenna in the prior art. The metal shell makes full use of the space of the wearable device, thereby helping to reduce the volume of the wearable device.

[0013] In addition, the direction of the waveguide antenna is outward radiation from the first opening, so that the metal shell of the wearable device is in contact with the human body, greatly reducing the absorption of the human body to the antenna energy and improving the efficiency of the antenna.

[0014] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and / or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0015] The above and / or additional aspects and advantages of the application will become apparent and be readily appreciated from the description of the embodiments, which follows, including the detailed description and the accompanying drawings.

[0016] Figure 1 is a schematic diagram of a wearable device provided by an embodiment of the application;

[0017] Figure 2 is a schematic diagram of a metal shell and a feed part in a wearable device provided by an embodiment of the application;

[0018] Figure 3 is a schematic diagram of a metal shell and a feed part in a wearable device provided by an embodiment of the application;

[0019] Figure 4 is a field distribution schematic diagram of a metal shell and a feed part in a wearable device provided by an embodiment of the application;

[0020] Figure 5 is an antenna two-dimensional directional diagram of a metal shell and a feed part in a wearable device provided by an embodiment of the application;

[0021] Figure 6 is an antenna three-dimensional directional diagram of a metal shell and a feed part in a wearable device provided by an embodiment of the application;

[0022] Figure 7 is a schematic diagram of a wearable device provided by an embodiment of the application;

[0023] Figure 8is a schematic diagram of a metal shell and a feeding part in a wearable device provided by an embodiment of the present application;

[0024] Figure 9 is a field distribution schematic diagram of a metal shell and a feeding part in a wearable device provided by an embodiment of the present application;

[0025] Figure 10 is an antenna direction superposition diagram of a metal shell and a feeding part in a wearable device provided by an embodiment of the present application;

[0026] Figure 11 is a schematic diagram of a wearable device provided by an embodiment of the present application;

[0027] Figure 12 is a schematic diagram of a circuit board in a wearable device provided by an embodiment of the present application.

[0028] Figures 1 to 12 Reference signs:

[0029] 100, wearable device; 110, metal shell; 112, bottom wall; 114, side wall; 116, step surface; 120, signal penetration part; 130, dial; 140, feeding part; 150, circuit board; 152, through hole; 160, columnar waveguide antenna. DETAILED DESCRIPTION

[0030] Embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0031] The terms "first", "second" in the description and claims of the present application can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally means that the front and rear associated objects are in an "or" relationship.

[0032] In the description of this application, it should be understood that the terms "length", "width", "thickness", "upper", "lower", "bottom", "inner", "outer", "horizontal", "vertical", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0033] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] The following is combined with Figures 1 to 12 Describes a wearable device 100 according to an embodiment of this application.

[0035] like Figure 1 , Figure 7 and Figure 11 As shown, a wearable device 100 according to an embodiment of this application includes: a metal housing 110, the metal housing 110 including a first cavity and a first opening; a signal penetrating portion 120 disposed at the first opening of the housing; a dial 130 in contact with the signal penetrating portion 120, the signal penetrating portion 120 being located between at least a portion of the metal housing 110 and at least a portion of the dial 130; and a power supply portion 140 disposed within the first cavity, the power supply portion 140 and the metal housing 110 constituting a waveguide antenna. Specifically, the power supply portion 140 is disposed at the middle position of the metal housing 110.

[0036] In embodiments of this application, the wearable device 100 includes a metal housing 110, a signal penetrating portion 120, a dial 130, and a power supply portion 140. The metal housing 110 has a first cavity and a first opening. The power supply portion 140 is disposed within the first cavity and connected to the metal housing 110. Thus, the metal housing 110 and the power supply portion 140 constitute a waveguide antenna. Furthermore, the signal penetrating portion 120 is located between the dial 130 and the metal housing 110, allowing the waveguide antenna to transmit electromagnetic waves, thereby enabling communication by the wearable device 100. The signal penetrating portion 120 can be of any shape and is used for radiation from the waveguide antenna.

[0037] And, the antenna formed by the horn structure of the metal shell 110 is a kind of aperture antenna, the gain and bandwidth of which can be greatly improved compared with the monopole antenna and loop antenna in the prior art, and the metal shell 110 makes full use of the space of the wearable device 100, which helps to reduce the volume of the wearable device 100.

[0038] And, the direction of the waveguide antenna is outward radiation from the first opening, so that the metal shell 110 of the wearable device 100 is in contact with the human body, greatly reducing the absorption of the antenna energy by the human body and improving the efficiency of the antenna.

[0039] And, as shown in Figure 2 , Figure 3 and Figure 8 , the metal shell 110 includes a bottom wall 112, a feeding portion 140 arranged on the bottom wall 112, and a side wall 114 arranged on the periphery of the bottom wall 112, and the first opening and the bottom wall 112 are respectively arranged at two ends of the side wall 114 away from each other. Specifically, the metal shell 110 includes a bottom wall 112 and a side wall 114 arranged on the periphery of the bottom wall 112, and the bottom wall 112 and the first opening are respectively arranged at two ends of the side wall 114 away from each other, and the metal shell 110 forms a larger horn structure, thereby improving the efficiency of the entire antenna.

[0040] Further, the bottom wall 112 and the side wall 114 are of an integrated structure or a split structure, for example, an integrated metal shell 110 is obtained by stamping or cutting, or a split metal shell 110 is obtained by welding or splicing.

[0041] And, as shown in Figure 8 , the side wall 114 is in a quadrangular cylindrical structure, and the metal shell 110 and the feeding portion 140 form a rectangular waveguide horn antenna. Specifically, the side wall 114 is in a quadrangular cylindrical structure, and the bottom wall 112 is in a rectangular plate structure, so that the metal shell 110 and the feeding portion 140 form a rectangular waveguide horn antenna.

[0042] Further, as shown in Figure 8 and Figure 9 , the side wall 114 is in a stepped structure in the direction from the bottom wall 112 to the first opening, and the area of the first opening is greater than that of the bottom wall 112. Specifically, the side wall 114 is in a stepped structure in the direction from the bottom wall 112 to the first opening of the metal shell 110, and the area of the first opening is greater than that of the bottom wall 112, and further, the metal shell 110 forms a horn structure with a small bottom and a large opening, and the stepped structure can increase the wave band of the waveguide antenna. The stepped structure can be a single-step or a multi-step.

[0043] As a possible implementation, as shown inFigure 1 、 Figure 7 and Figure 11 As shown in , the signal penetration part 120 is in a ring structure, the outer ring of the signal penetration part 120 is in contact with the metal shell 110, and the inner ring of the signal penetration part 120 is in contact with the dial 130. Specifically, the signal penetration part 120 is in a ring structure, the signal penetration part 120 is arranged between the metal shell 110 and the dial 130, and then the waveguide antenna formed by the metal shell 110 and the feed part 140 can radiate to the outside of the first opening in a larger area, and the entire radiation aperture is more regular, and then the direction of the antenna is more balanced, thereby improving the efficiency of the antenna.

[0044] As a possible implementation, the signal penetration part 120 is an insulating signal penetration part 120. Specifically, the signal penetration part 120 can be an insulating signal penetration part 120, which reduces the shielding effect on the antenna and improves the radiation effect of the antenna.

[0045] As a possible implementation, as shown in Figure 1 , Figure 7 and Figure 11 , the signal penetration part 120 is sealingly connected with the metal shell 110, and the signal penetration part 120 is sealingly connected with the dial 130. Specifically, the signal penetration part 120 is sealingly connected with the metal shell 110 and the dial 130, thereby improving the waterproof performance of the wearable device 100, and reducing the influence of external components on the waveguide antenna.

[0046] Further, the signal penetration part 120 can be made of plastic or plastic material, and in the manufacturing process, the signal penetration part 120, the dial 130 and the metal shell 110 are integrally molded by injection molding process.

[0047] As a possible implementation, as shown in Figure 3 , the side wall 114 is in a cylindrical structure, and the metal shell 110 and the feed part 140 constitute a circular waveguide horn antenna. Specifically, the side wall 114 is in a cylindrical structure, and the bottom wall 112 is in a circular plate structure, so that the metal shell 110 and the feed part 140 form a circular waveguide horn antenna.

[0048] Further, as shown in Figure 2 , the side wall 114 is in a stepped structure along the direction from the bottom wall 112 to the first opening, and the area of the first opening is larger than the area of the bottom wall 112. Specifically, the side wall 114 is in a stepped structure along the direction from the bottom wall 112 of the metal shell 110 to the first opening, and the area of the first opening is larger than the area of the bottom wall 112, and then the metal shell 110 forms a horn structure with a small bottom and a large opening, and the stepped structure can increase the wave band of the waveguide antenna. The stepped structure can be a single-step or a multi-step.

[0049] Wherein, the main mode of the circular waveguide is TE11 mode, TE01 mode and TM01 mode, the antenna directivity pattern of the TE11 mode is not axisymmetric, and there are nulls in some directions, and the bottom wall 112 and the first opening of the metal shell 110 are composed of two circles with different radii, and the two different radii of the side wall 114 can be utilized, wherein the diameter of the first opening is R1, the diameter of the bottom wall 112 is R2, the distance from the stepped surface 116 of the side wall 114 to the first opening is D1, and the distance from the stepped surface 116 of the side wall 114 to the bottom wall 112 is D2, thereby forming the TE11 mode of the main mode in the circular waveguide with the diameter R1 of the first opening, utilizing the discontinuity of the stepped structure of the side wall 114 to generate the high-order mode TM11 mode and TE12 mode, and by adjusting the ratio of R2 and R1 and / or the length difference of D1 and D2, the mode ratio and phase can be adjusted, and the directivity pattern of the waveguide antenna can be adjusted for different use scenarios.

[0050] Further, by changing the form of the feed source, the effects of adjusting the mode ratio and phase and adjusting the directivity pattern of the waveguide antenna for different use scenarios can also be achieved.

[0051] Specifically, as shown in Figure 4 When excited by the feed part 140, the electric field and the magnetic field excited by the feed part 140 are rotationally symmetric around the feed part 140, and the TE01 mode field distribution is closest to one of the cylindrical waveguide main modes, so the main mode of the cylindrical waveguide excited by the feed part 140 is the TE01 mode, and thus the main mode of the waveguide antenna excited by the circular waveguide is also the TE01 mode.

[0052] Wherein, as shown in Figure 5 and Figure 6 The electric field and the magnetic field of the metal shell 110 excited by the feed part 140 of the present application are rotationally symmetric about the axis of the circular waveguide, so the basic directivity pattern of the antenna is close to rotational symmetry, and has strong beam pointing and low sidelobes.

[0053] Since the stepped circular waveguide horn antenna formed by the metal shell 110 and the feed part 140 provided by the present application is a semi-closed structure antenna, the efficiency is also concentrated in the area above the dial 130, so when the human body wears the wearable device 100, the human body has a small absorption of the electromagnetic waves of the antenna.

[0054] And since the main mode of the cylindrical waveguide and the aperture field distribution of the conical horn are basically the same, the feed part 140 and the metal shell 110 have better adaptability, the antenna has higher system efficiency, and the sidelobe is lower, and the bit error rate is lower.

[0055] As a possible implementation, as shown in Figure 8 and Figure 9As shown, the step surface 116 of the step structure is inclined when the side wall 114 is in a quadrangular cylindrical structure. Specifically, the step surface 116 is inclined, and the step surface 116 is lower at one end of the bottom wall 112 than at the other end close to the first opening, so that the metal shell 110 is closer to the horn structure, improving the radiation effect of the antenna.

[0056] Specifically, the wearable device 100 provided in the present application has a square structure, and the interface of the metal shell 110 is rectangular, so that when the metal shell 110 is fed at the feed part 140, a rectangular waveguide is formed, and the metal shell 110 forms a corner horn structure, and the main mode excited by the waveguide is the TE10 mode, as shown in Figure 9 As shown, the TE10 mode is formed on the basis of the bottom wall 112, where the arrow represents the direction, and the density of the field strength, and the current distribution in the feed waveguide is as shown in Figure 9 As shown, the rectangular waveguide excited by the TE10 mode suddenly widens at the step structure, the length of the two sides increases, and the TE30 mode is formed on the basis of the step surface 116. By appropriately adjusting the size ratio of the dial 130 and the horn, the phases of the TE10 mode and the TE30 mode can be opposite at the position of the first opening (i.e., the aperture of the waveguide antenna) corresponding to the feed part 140 (i.e., the middle position of the aperture of the waveguide antenna), and in-phase at the edge position of the first opening (i.e., the edge position of the aperture of the waveguide antenna), so as to form a central part that is concave downward, has a wide beam pattern, and the directional pattern of this shape can ensure that the upper half of the dial 130 is close to uniform radiation.

[0057] Thus, the directions of the antenna superimposed with the TE10 mode and the TE30 mode are superimposed, increasing the frequency band of the antenna.

[0058] Furthermore, as shown in Figure 10 The directional pattern of the antenna is more uniform, and the antenna of the wearable device 100 can better adapt to different usage requirements in different scenarios and has better signals in complex environments.

[0059] As a possible implementation, as shown in Figure 1 , Figure 7 , Figure 11 and Figure 12 The circuit board 150 is further included, which is arranged in the first cavity and has a gap between the circuit board 150 and the side wall 114, and the signal penetration part 120 is arranged corresponding to the gap. Specifically, the circuit board 150 is used to receive control instructions and perform related operations, and the circuit board 150 can realize signal transmission through the waveguide antenna.

[0060] As a possible implementation, as shown in Figure 1 , Figure 7 and Figure 11As shown, there is a gap between the peripheral side of the circuit board 150 and the side wall 114. Specifically, the circuit board 150 is not connected to the side wall 114, thereby avoiding the radiation port of the waveguide antenna, and improving the efficiency of the antenna.

[0061] As a possible implementation, as shown in FIG. 1, the metal shell 110 further comprises a cylindrical waveguide antenna 160, which is arranged in the metal shell 110 and located inside the first cavity. The cylindrical waveguide antenna 160 comprises a second cavity and a second opening, and the second opening is directed to the dial 130. The feed part 140 is located in the second cavity. The cylindrical waveguide antenna 160, the metal shell 110 and the feed part 140 constitute a coaxial waveguide antenna. Figure 11

[0062] Further, the cross section of the metal shell 110 is circular, and the cross section of the cylindrical waveguide antenna 160 is circular.

[0063] Specifically, the cylindrical waveguide antenna 160 is arranged in the metal shell 110, and the structure of the cylindrical waveguide antenna 160 is basically the same as that of the metal shell 110. The size of the cylindrical waveguide antenna 160 is smaller than that of the metal shell 110. The cylindrical waveguide antenna 160 comprises a second cavity and a second opening, and the first opening and the second opening are directed in the same direction. Thus, the cylindrical waveguide antenna 160, the metal shell 110 and the feed part 140 constitute a coaxial waveguide antenna, which effectively increases the width of the lobe of the antenna and the bandwidth.

[0064] Specifically, a hollow cylindrical waveguide antenna 160 is added at the center of the metal shell 110. Thus, the metal shell 110, the cylindrical waveguide antenna 160 and the feed part 140 constitute a coaxial waveguide antenna. The main mode of the coaxial waveguide antenna is TEM mode, which can provide a wider lobe width and bandwidth. The working frequency f1 is determined by the distance R3 from the side wall 114 of the metal shell 110 to the side wall 114 of the cylindrical waveguide antenna 160 and the diameter R4 of the cylindrical waveguide antenna 160.

[0065] The cylindrical waveguide antenna 160 can constitute a cylindrical waveguide antenna alone, and the main mode is TE11 mode, TE01 mode or TM01 mode. Thus, a higher gain and stronger directivity can be provided, and the working frequency f2 is determined by the inner core diameter R4.

[0066] In this way, the coaxial waveguide antenna has the characteristics of multiple frequencies, and the working frequencies of the two can be adjusted independently without affecting each other.

[0067] Furthermore, the working frequency of the metal shell 110 and the frequency of the cylindrical waveguide antenna 160 can be close to each other, thereby increasing the bandwidth and further increasing the frequency band and the bandwidth.

[0068] As a possible implementation, as shown in FIG. 1, the metal shell 110 further comprises a cylindrical waveguide antenna 160, which is arranged in the metal shell 110 and located inside the first cavity. The cylindrical waveguide antenna 160 comprises a second cavity and a second opening, and the second opening is directed to the dial 130. The feed part 140 is located in the second cavity. The cylindrical waveguide antenna 160, the metal shell 110 and the feed part 140 constitute a coaxial waveguide antenna. Figure 12 ​As shown, the circuit board 150 comprises a through hole 152, and the second opening is arranged corresponding to the through hole 152. Specifically, the through hole 152 is arranged on the circuit board 150, and the through hole 152 corresponds to the second opening of the columnar waveguide antenna 160, so as to enhance the radiation space of the columnar waveguide antenna 160 and improve the efficiency of the antenna.

[0069] The through hole 152 can be a circular hole.

[0070] As a possible implementation, the metal shell 110 is provided with a groove on the side facing the first cavity. Specifically, by arranging the groove on the side of the metal shell 110 facing the first cavity, the mode ratio and phase are adjusted, and the directivity pattern of the waveguide antenna can be adjusted for different use scenarios.

[0071] As a possible implementation, a metal column is further arranged on the metal shell 110 and located in the first cavity. Specifically, by arranging the metal column on the metal shell 110, the mode ratio and phase are adjusted, and the directivity pattern of the waveguide antenna can be adjusted for different use scenarios.

[0072] The metal column and the groove can be arranged on the metal shell 110 at the same time, so as to adjust the mode ratio and phase, and the directivity pattern of the waveguide antenna can be adjusted for different use scenarios.

[0073] As a possible implementation, the edges of the first opening are in the same plane. Specifically, the edges of the first opening are uniformly without recesses and protrusions, so that the radiation of the antenna is more uniform, and the efficiency of the antenna is improved.

[0074] As a possible implementation, the wearable device 100 further comprises a battery module for powering the components such as the feeding part 140 and the watch face 130.

[0075] The watch face 130 comprises a display module.

[0076] Further, the wearable device 100 is a watch, specifically a smart watch, and the wearable device 100 further comprises a watchband connected with the shell or the signal penetration part 120.

[0077] In the description of the present specification, the description referring to the terms "one embodiment", "a specific embodiment", or the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0078] While the embodiments of the application have been shown and described, it is to be understood that the embodiments can be varied, modified, substituted and changed by those skilled in the art without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. A wearable device, comprising: The wearable device comprises: a metal shell comprising a bottom wall and a side wall, the bottom wall and the side wall enclosing a first cavity and forming a first opening at an end of the side wall away from the bottom wall; a signal penetration part arranged at the first opening; a dial in contact with the signal penetration part, the signal penetration part being located between the metal shell and the dial; a feeding part arranged in the first cavity, the feeding part and the metal shell forming a waveguide antenna, wherein the side wall is in a stepped structure in a direction from the bottom wall to the first opening, and an area of the first opening is greater than an area of the bottom wall; a columnar waveguide antenna arranged in the metal shell and located inside the first cavity, the columnar waveguide antenna comprising a second cavity and a second opening, the second opening being directed towards the dial, the feeding part being located in the second cavity, the columnar waveguide antenna, the metal shell and the feeding part forming a coaxial waveguide antenna.

2. The wearable device according to claim 1, wherein the signal penetration part is in a ring structure, an outer ring of the signal penetration part being in contact with the metal shell, and an inner ring of the signal penetration part being in contact with the dial.

3. The wearable device according to claim 1, wherein the signal penetration part is an insulating signal penetration part.

4. The wearable device according to any one of claims 1 to 3, wherein the signal penetration part is in sealed connection with the metal shell, and the signal penetration part is in sealed connection with the dial.

5. The wearable device according to any one of claims 1 to 3, wherein the side wall is in a cylindrical structure, the metal shell and the feeding part forming a circular waveguide horn antenna; or the side wall is in a quadrangular cylindrical structure, the metal shell and the feeding part forming a rectangular waveguide corner horn antenna.

6. The wearable device according to claim 5, wherein when the side wall is in the quadrangular cylindrical structure, a step surface of the stepped structure is arranged in an inclined manner.

7. The wearable device of any one of claims 1-3, wherein, The wearable device further comprises: a circuit board arranged in the first cavity, the circuit board having a gap between the circuit board and the side wall, and the signal penetration part being arranged corresponding to the gap.

8. The wearable device according to claim 7, wherein the circuit board comprises a through hole, and the second opening is arranged corresponding to the through hole.

9. The wearable device according to any one of claims 1 to 3, wherein the metal shell is provided with a groove on a side of the metal shell facing the first cavity, and / or a metal column is arranged in the metal shell and located in the first cavity.

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