Wearable device

Abstract

The embodiment of the invention discloses wearable equipment, and relates to the technical field of antennas. According to the specific scheme, the wearable device comprises a metal frame body, a display screen, a floor and a separator. The metal frame body is encircled to form an accommodating cavity; the display screen is arranged on one side of the metal frame body; the floor and the metal frame body are arranged at an interval; the isolation piece is electrically connected with the floor and arranged on the side, away from the display screen, of the metal frame. The metal frame body and the isolation piece are arranged at intervals in the direction perpendicular to the plane where the display screen is located (hereinafter referred to as the first direction), an annular area is defined by the projection of the metal frame body, the projection of the floor is located in the annular area, and the projection of the isolation piece and the projection of the metal frame body are at least partially overlapped; the magnetic field generated by the metal frame body and the magnetic field generated by the isolation piece are partially offset, so that the influence of a human body on antenna radiation is reduced, and the antenna radiation performance of the wearable equipment is improved.

Description

Technical Field

[0001] The present application relates to the field of antenna technology, and in particular to a wearable device. Background Art

[0002] With the development of smart wearable devices, the functions of smart wearable devices are increasing; smart wearable devices can realize wireless communication functions through antennas provided therein.

[0003] When worn, the antenna in the smart wearable device is close to the human body (such as the forearm), and the forearm has a significant impact on the radiation performance of the antenna in the device. Summary of the invention

[0004] The embodiment of the present application provides a wearable device, which weakens and adjusts the magnetic field on the side close to the human body by setting an isolation piece, thereby reducing the human body's absorption of antenna radiation and improving the antenna radiation performance.

[0005] In order to achieve the above purpose, the embodiment of the present application adopts the following technical solution:

[0006] In a first aspect, a wearable device is provided, the wearable device comprising: a metal frame, a display screen, a floor, and an isolating member. The metal frame surrounds and forms a receiving cavity; the display screen is disposed on one side of the metal frame; the floor is spaced apart from the metal frame; the isolating member is electrically connected to the floor and is disposed on a side of the metal frame away from the display screen. Along a direction perpendicular to the plane where the display screen is located (hereinafter referred to as the first direction, which is the same as the z direction), the metal frame and the isolating member are spaced apart, the projection of the metal frame surrounds and forms an annular area, the projection of the floor is located within the annular area, and the projection of the isolating member at least partially overlaps with the projection of the metal frame.

[0007] Based on this scheme, by setting an isolator on the side of the wearable device close to the human body, the weakening adjustment of the magnetic field on the side close to the human body during the antenna radiation process is achieved. Thus, by reducing the absorption loss of the human body to the radiated electromagnetic waves, the loss of the human body to the overall radiation performance of the antenna is reduced, and the radiation performance of the antenna is improved. Specifically, the current direction of the metal frame is opposite to the current direction of the floor. Since the isolator is electrically connected to the floor in series, the current direction of the isolator is the same as the current direction of the floor, so the current direction of the isolator is opposite to the current direction of the metal frame. Among them, the metal frame and the isolator are arranged at intervals. When the wearable device is in a wearing state, the distance from the isolator to the user can be the minimum distance from the isolator to the forearm skin of the wearable device. Similarly, the distance from the metal frame to the user can be the minimum distance from the metal frame to the forearm skin of the wearable device. The metal frame radiates signals as the radiator of the antenna. The magnetic field generated by the current on the metal frame is opposite to the magnetic field generated by the current on the isolator. Therefore, the magnetic field generated by the current on the isolator can partially offset the magnetic field generated by the current on the metal frame, weakening the magnetic field on the side close to the human body. The electrical connection between the isolating member and the floor can be formed in one piece or there can be a central electrical connector.

[0008] In one possible design, the floor is at least partially located in the accommodating cavity, a first gap is formed between the outer wall of the floor and the inner wall of the accommodating cavity, and along the first direction, the projection of the isolation member at least partially overlaps with the projection of the first gap.

[0009] Based on this solution, the floor is spaced apart from the metal frame, and is partially or entirely located in a receiving cavity surrounded by the metal frame, and the portion of the floor located in the receiving cavity forms a first gap relative to the metal frame. In addition to the portion disposed opposite to the metal frame, the isolator also includes a portion disposed opposite to the first gap. The size and shape of the isolator can be flexibly adjusted to suit the design of other related components of the wearable device for easy assembly.

[0010] In a possible design, along the first direction, a projection of the partition at least partially overlaps with a projection of the floor.

[0011] Based on this solution, the isolator includes not only a portion disposed opposite to the metal frame and a portion disposed opposite to the first gap, but also a portion disposed opposite to the floor, which not only meets the assembly requirements but also shortens the wiring of the electrical connection between the isolator and the floor.

[0012] In a possible design, the spacer is a plate-like structure. The plate-like structure refers to a structure without a hollow space, which may be square, circular, polygonal, or the like.

[0013] Based on this solution, the isolation member does not need to have holes, is easy to manufacture, and can be directly used as the bottom support of the wearable device to support internal devices.

[0014] In a possible design, a circular hole is opened in the middle of the plate-like structure, and the circular hole is coaxially arranged with the metal frame. The circular hole is opened in the middle of the plate-like structure to form a hollow structure, and the shape of the opening can be square, circular, polygonal, etc.

[0015] Based on this solution, the isolation piece can adapt to the bottom surround setting of the wearable device and flexibly adjust the shape of the opening.

[0016] In a possible design, the floor includes a first floor and a first extension portion connected to the first floor, the first floor is located in the accommodating cavity, the first extension portion extends along the first direction toward the annular hole, and the isolation piece is electrically connected to the extension portion.

[0017] Based on this solution, the first floor can be extended toward the human body to the plane where the isolation element is located, so that the floor can be electrically connected to the isolation element through the first extended portion, shortening the wiring of the electrical connection between the isolation element and the floor.

[0018] In a possible design, the floor includes a second floor and a second extension portion connected to the second floor, the second extension portion extends toward the isolation member along the first direction, and is integrally formed with the isolation member.

[0019] Based on this solution, the floor and the isolating member are formed in one piece, and no additional electrical connector is required to achieve electrical connection, so that the current direction of the isolating member can be the same as the current direction of the floor.

[0020] In a possible design, the edge of the plate-like structure has a bent portion that bends toward the direction where the metal frame is located. The bent portion is a right-angle bent structure or an arc-shaped bent structure.

[0021] Based on this solution, the wearable device can flexibly select the edge shape of the isolation piece to meet the requirements of aesthetics and adaptability.

[0022] In one possible design, the wearable device also includes at least two electrical connectors connected between the floor and the isolation member.

[0023] Based on this solution, the floor and the isolator are connected in series through at least two electrical connectors, so that the current on the floor is connected to the isolator, so that the current direction of the floor is the same as the current direction of the isolator. The electrical connector can be a wire connection or a low-impedance connection.

[0024] In one possible design, the electrical connection is an impedance.

[0025] In one possible design, the wearable device also includes a circuit board and a floor, the circuit board is located between the base plate and the display screen, the circuit board includes at least one zero potential reference point, and the floor includes the at least one zero potential reference point, so that the metal frame is grounded through the zero potential reference point on the floor.

[0026] In a possible design, the circuit board includes at least one feed source, and the at least one feed source is electrically connected to the metal frame, so that the at least one feed source feeds a current signal into the metal frame, and the metal frame radiates the signal as a radiator of the antenna.

[0027] In one possible design, the wearable device also includes a battery module, which is located between the display screen and the circuit board.

[0028] In a possible design, the wearable device is a watch, and the metal frame constitutes the side wall of the watch. The metal frame is the watch frame, wraps the side of the watch body, and extends from the display screen to the bottom plate to constitute the side wall of the watch. When the watch frame extends toward the bottom plate, the watch frame can be closer to the isolation member, and the isolation member has a more obvious effect of weakening the magnetic field on the side of the watch frame close to the human body.

[0029] In a possible design, the circuit board is the floor. The circuit board provides a zero potential reference for the wearable device, realizing the function of a reference ground. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of a smart watch wearing scenario and wearing status;

[0031] Figure 2a It is a front view of the smart watch;

[0032] Figure 2b This is the back view of the smart watch;

[0033] Figure 3 A schematic diagram of a smart watch;

[0034] Figure 4a A top view of an antenna structure constructed using a frame and a floor;

[0035] Figure 4b A side view of an antenna structure constructed using a frame and a floor;

[0036] Figure 5a and Figure 5b A schematic diagram comparing the two antenna schemes provided in the embodiments of the present application when in operation;

[0037] Figure 6aA schematic diagram of an antenna structure provided with a parasitic loop according to an embodiment of the present application;

[0038] Figure 6b A top view of the antenna structure provided for this embodiment;

[0039] Figure 7 A schematic diagram of electrical parameter distribution of an antenna solution provided in an embodiment of the present application when in operation;

[0040] Figure 8 For having Figure 6a and Figure 6b The S parameters and efficiency simulation diagram of the antenna composed as shown;

[0041] Figure 9a A ring diagram of an antenna structure of an isolated ring antenna solution provided in an embodiment of the present application;

[0042] Figure 9b A top view of an antenna structure of an isolation ring antenna solution provided in an embodiment of the present application;

[0043] Fig.10 A schematic diagram of electrical connection of an antenna structure provided in an embodiment of the present application;

[0044] Fig.11 A schematic diagram of the size identification of an antenna structure provided in an embodiment of the present application;

[0045] Fig.12 A schematic diagram of electrical parameter distribution of another antenna solution provided in an embodiment of the present application when it is working;

[0046] Fig.13 A schematic diagram of electrical parameter distribution of another antenna solution provided in an embodiment of the present application when it is working;

[0047] Fig.14 A simulation schematic diagram of an isolation ring antenna solution provided in an embodiment of the present application;

[0048] Fig.15 A schematic diagram of current distribution of each component in an antenna solution provided in an embodiment of the present application;

[0049] Fig.16 A schematic diagram of dimension identification of another antenna structure provided in an embodiment of the present application;

[0050] Fig.17 A schematic diagram of dimension identification of another antenna structure provided in an embodiment of the present application;

[0051] Fig.18 A schematic diagram of an antenna arrangement scheme in a watch provided in an embodiment of the present application;

[0052] Fig.19 A schematic diagram of a setting scheme of an isolation ring in a watch provided in an embodiment of the present application;

[0053] Fig. 20 A side view of a watch provided with an isolation ring according to an embodiment of the present application;

[0054] Fig.21 A schematic diagram of the edge of an isolating member provided in an embodiment of the present application;

[0055] Fig. 22 A schematic diagram of a spacer arrangement scheme provided in an embodiment of the present application;

[0056] Fig.23 A back view of an isolating member provided in an embodiment of the present application;

[0057] Fig.24 A schematic diagram of another isolating element arrangement scheme provided in an embodiment of the present application;

[0058] Fig.25 A back view of another isolating member provided in an embodiment of the present application;

[0059] Fig.26 A schematic diagram of another isolating element arrangement scheme provided in an embodiment of the present application;

[0060] Fig. 27 A back view of another isolation member provided in an embodiment of the present application. DETAILED DESCRIPTION

[0061] At present, smart wearable devices have been widely used. Taking a smart watch as an example, the smart wearable device can be worn on the user's forearm (such as the wrist) to provide the user with a smart experience. Figure 1 In some scenarios, the smart watch 100 can provide positioning functions for users. For example, the smart watch 100 can communicate wirelessly with positioning devices such as satellites 200 to obtain current positioning information. In other scenarios, the smart watch 100 can also monitor the user's vital signs information, such as the user's heart rate and other vital signs during exercise. The smart watch can communicate wirelessly with other electronic devices 300 (such as mobile phones, etc.), send the acquired vital signs information to the mobile phone, and realize data sharing. In other scenarios, the smart watch 100 can also provide voice call and data connection functions. For example, the voice call can be a voice call based on GSM, VoLTE, TDSCDMA, CDMA, VONR and other networks, and the data connection function can be a data connection based on WCDMA, TDSCDMA, CDMA, LTE, 5G NR, Bluetooth and WIFI (such as 2.4GWIFI and 5GWIFI) and other networks.

[0062] In some embodiments, an antenna may be provided in the smart wearable device to implement the wireless communication function in the above example. However, due to the limited size of the smart wearable device itself, the space available for the antenna is also relatively small. In some designs, the antenna design can be miniaturized by reusing the metal structure in the smart wearable device.

[0063] It should be noted that the embodiment of the present application takes a smart watch worn on the user's forearm as an example. Unless otherwise specified, the "distance from A to the user" mentioned below refers to the "minimum distance from A to the surface of the user's forearm", and other wearable devices refer to the "minimum distance from A to the surface of the part where it is worn".

[0064] The z-direction projection described in the embodiments of the present application refers to the projection along the z direction to the xoy plane. Unless otherwise specified, the projection described below refers to the z-direction projection. The relative arrangement of A and B described in the embodiments of the present application, unless otherwise specified, means that the projection of A in the z direction falls on B, and the projection of B in the z direction falls on B.

[0065] The "interval arrangement" of A and B described in the embodiments of the present application refers to the presence of a gap between A and B. The two can form a gap relative to each other or can form a gap by staggering.

[0066] In the embodiments of the present application, when an element is referred to as being "electrically connected" to another element, it may be directly on the other element or there may be an element in the middle. When an element is considered to be "electrically connected" to another element, it may be a contact connection, for example, it may be a wire connection. In the present application, low-impedance connectivity is used as an example of achieving electrical connection, and the implementation method of "electrical connection" is not limited.

[0067] The antenna scheme provided in the embodiment of the present application can be applied to smart wearable devices to support the wireless communication function of the smart wearable devices. For example, the smart wearable device can be a smart watch, a smart bracelet and other devices. It should be understood that the antenna scheme provided in the embodiment of the present application can also be applied to other electronic devices with use scenarios close to the human body. For example, the antenna scheme can also be applied to mobile phones, tablet computers, personal digital assistants (PDAs), augmented reality (AR) and virtual reality (VR) devices, media players and other portable mobile devices.

[0068] The embodiments of the present application do not impose any special restrictions on the specific form of the device.

[0069] For example, Figure 2a and Figure 2bAll of them are schematic diagrams of the appearance of a smart watch 100 (hereinafter referred to as the smart watch) provided in an embodiment of the present application. Figure 2a It is a front view of a smart watch 100 , which may include a display screen 101 and a watch frame 102 . Figure 2b It is a back view of the smart watch 100 , and the watch 100 may include a bottom 103 .

[0070] Please refer to Figure 3 , Figure 3 A schematic diagram of the composition of a watch 100 provided in an embodiment of the present application. The display screen 101, the watch frame 102, and the watch bottom 103 of the watch are assembled in sequence to obtain the appearance of the watch 100. Between the display screen 101 and the watch bottom 103, a plurality of structural / electronic components may be arranged inside the watch frame 102. Exemplarily, the plurality of structural / electronic components may include a battery 104, one or more circuit boards 105, a motor 106, a microphone 107, a speaker 108, a sensor 109, etc.

[0071] The following is a brief introduction of each.

[0072] The display screen 101 is used to display images, videos, etc. The display screen 101 includes a display panel. The display panel can be a liquid crystal display 101 (liquid crystal display, LCD), an organic light-emitting diode (organic light-emitting diode, OLED), an active matrix organic light-emitting diode or an active matrix organic light-emitting diode (active-matrixorganic light emitting diode, AMOLED), a flexible light-emitting diode (flex light-emitting diode, FLED), Miniled, MicroLed, Micro-oLed, quantum dot light-emitting diodes (quantum dot light-emitting diodes, QLED), etc. In some embodiments, the watch 100 may include one or more display screens 101. In different implementations, the shape of the display screen 101 can be circular, square, rectangular, etc. The direction perpendicular to the plane where the display screen 101 is located is the z direction.

[0073] In some embodiments, the watch 100 includes a plurality of components that can provide rigid support, such as a metal watch frame, or a non-metallic watch bottom such as plastic or ceramic.

[0074] Among them, the watch frame 102 is used to provide support in the directions around the watch body (such as x and y directions). A display screen 101 is provided on one side of the watch frame 102, and a watch bottom 103 is provided on the side of the watch frame 102 away from the display screen 101. The watch frame 102 may include a closed ring structure made of metal material. It is understandable that the shape of the watch frame 102 may be related to the shape of the watch 100, which is not limited here. In the embodiment of the present application, the watch frame 102 is annular. The metal material may include low carbon steel, aviation aluminum, high strength aluminum alloy, stainless steel, titanium alloy, etc. In some embodiments, the watch frame 102 may also include non-metallic materials. For example, plastic, ceramic and other materials are wrapped at least partially in the metal closed ring to achieve the personalized appearance configuration of the watch frame 102. Corresponding to different designs, the watch frame 102 can be round, square, rectangular, etc. Exemplarily, the watch frame 102 can also be realized by an in-mold injection molding process. For example, a metal skeleton is prepared by die casting, and plastic is injected on the outside of the metal skeleton to obtain a complete watch frame 102. In this example, the metal skeleton in the bezel 102 may correspond to the closed ring structure of the metal material in the bezel 102. It should be noted that in other embodiments of the present application, the ring structure of the metal material in the bezel 102 may also be open, such as one or more openings are provided on the ring structure. The bezel 102 may also extend along the z direction to form a closed ring structure wrapped around the bezel. In some embodiments, when the bezel is made of metal, the bezel may also be used as an antenna radiator to achieve functional reuse.

[0075] In some embodiments, one or more buttons 111 may be provided on the outside of the bezel 102. The button 111 may be used as a physical input component, and the button 111 may receive operations such as pressing, long pressing, and / or rotating to implement functions such as power on / off adjustment, volume adjustment, and time adjustment. The button 111 may be a mechanical button 111 or a touch button 111.

[0076] The bottom of the watch 100 is supported by the bottom of the watch 100. The bottom of the watch 103 may include non-metallic materials such as plastic, fiberglass, and / or ceramic. In some embodiments, the bottom of the watch 103 may also include metal materials such as low-carbon steel, aviation aluminum, high-strength aluminum alloy, stainless steel, and / or titanium alloy. In some embodiments, in order to provide better wearing comfort and improve the assembly fit between the watch frame 102 and the bottom of the watch 103, non-metallic materials may be filled between the watch frame 102 and the bottom of the watch 103 by injection molding or other processes.

[0077] The circuit board 105 inside the watch 100 may be one or more. In some embodiments, at least one printed circuit board (PCB) and / or flexible printed circuit board (FPC) may be disposed on the bottom 103 of the watch. Figure 3 As shown, the circuit board 105 may include FPC-1051, PCB1-1052 and PCB2-1053. The multiple circuit boards 105 may be connected by electronic circuits to achieve signal interaction. The specific implementation of different circuit boards 105 may be different.

[0078] The circuit board 105 can be used as a carrier of electronic components and electronic circuits, such as communication chips, radio frequency devices, power amplifiers, filter devices and other electronic components. Exemplarily, a processor can be provided on the circuit board 105. The processor can include one or more processing units, for example: the processor can include an application processor (application processor, AP), a modem processor, a graphics processor (graphics processing unit, GPU), an image signal processor (imagesignal processor, ISP), a controller, a video codec, a digital signal processor (digital signal processor, DSP), a baseband processor, and / or a neural network processor (neural-network processing unit, NPU), etc. Among them, different processing units can be independent devices or integrated in one or more processors. The processor can generate an operation control signal according to the instruction opcode and the timing signal to complete the control of fetching and executing instructions. A memory can also be provided in the processor for storing instructions and data. In some embodiments, the memory in the processor can be a high-speed cache memory. The memory can save instructions or data used by the processor or used more frequently. If the processor needs to use the instruction or data, it can be directly called from the memory. Repeated access is avoided, the waiting time of the processor is reduced, and the efficiency of the system is improved. In some embodiments, the processor may be a microprocessor (Microprocessor Unit, MPU) or a microcontroller unit (Microcontroller Unit, MCU).

[0079] Communication modules such as a radio frequency module may also be provided on the circuit board 105. The radio frequency module is connected to the baseband processor via a baseband line, and the radio frequency module may also be connected to an antenna, thereby realizing a wireless communication function. Exemplarily, when transmitting a signal, the baseband processor sends a digital signal to the radio frequency module via a baseband line, and the radio frequency module converts and processes the digital signal to obtain a corresponding analog signal. The radio frequency module transmits the analog signal to the antenna so that the antenna converts the analog signal into an electromagnetic wave and radiates it outward. When receiving a signal, the antenna converts the electromagnetic wave into an analog signal carrying information and transmits it to the radio frequency module. The radio frequency module processes the analog signal in the radio frequency domain and converts it into a digital signal, which is then transmitted to the baseband processor. The baseband processor parses the digital signal to obtain the information carried in the received signal.

[0080] In this example, the circuit board 105 can provide a zero potential reference for each electronic component. For example, a zero potential reference can be provided for the electronic components by laying a metal material (such as copper) in at least one PCB and / or FPC. Optionally, the circuit board 105 can be set with one or more zero potential reference points. In some logic implementations, the circuit board 105 can be used as a reference ground for the antenna. In the following description of the present application, the reference ground function of the circuit board 105 is abstracted as the floor 112 for description. Of course, in other embodiments, when the bottom of the table 103 includes at least part of metal, the bottom of the table 103 can cooperate with the floor 112 corresponding to the circuit board 105, or the bottom of the table 103 can be used independently as the floor 112.

[0081] In the embodiment of the present application, the bezel 102 can be used to cooperate with the floor 112 to realize the setting of the antenna. For example, the bezel 102 is a metal frame, which is a part of the antenna radiator, and the floor 112 is set as the reference ground of the antenna. In other embodiments, the gap between the bezel 102 and the floor 112 can form a slot antenna to support the wireless communication function of the watch 100.

[0082] It is understandable that in other embodiments, the watch 100 may also use other metal structures as part of the antenna radiator. For example, a metal frame is provided between the display screen 101 and the bottom 103 of the watch, and the metal frame is located in the receiving cavity formed by the watch frame 102, and serves as part of the antenna radiator. For another example, part of the watch frame 102 is a metal frame, and the metal frame serves as part of the antenna radiator.

[0083] As an example, see Figure 4a and Figure 4b , Figure 4a and Figure 4bAll of them are schematic diagrams of antenna structures constructed using a watch frame 102 and a floor 112. The watch frame 102 is annular in structure, forming the side wall of the watch 100 and surrounding a receiving cavity. Some components of the watch 100 are arranged in the receiving cavity formed by the watch frame 102. The watch frame 102 and the floor 112 are arranged at intervals. In some embodiments, the floor 112 is at least partially located in the receiving cavity, and a first gap 1001 is formed between the outer wall of the floor 112 and the inner wall of the receiving cavity. A feeding point can be set on the watch frame 102, and at least one grounding point can be set on the floor 112. The feeding point is used to connect a feed source, and the feed source can be set on a circuit board 105. When the antenna is working, the feed source can feed an electrical signal to the watch frame 102. In some embodiments, a matching tuning component can also be set between the feed source and the watch frame 102 for antenna port tuning, etc. For example, a small capacitor (such as a capacitor less than 1.5pF) can be set between the feed source and the watch frame 102. The grounding point can be used as a point on the meter frame 102 where the current flows back to the floor 112, that is, the meter frame 102 and the floor 112 are electrically connected to achieve grounding at this point. In some embodiments, for any grounding point, one or more components such as capacitors / inductors can be provided between the meter frame 102 and the floor 112 to achieve tuning of antenna parameters such as port impedance. Exemplarily, the components such as capacitors / inductors can be small impedance matching components. Specifically, it can be a large capacitor (such as a capacitor greater than 2pF) or a small inductor (such as an inductor less than 5nH) or 0 ohm, etc.

[0084] In other embodiments, the floor 112 may also be located outside the accommodating cavity and spaced apart from the frame 102 .

[0085] As an example, a top view of an antenna structure constructed using the frame 102 and the floor 112 is shown. Figure 4a As shown, the feeding point is set at the 9 o'clock position of the meter frame 102 to access the feed source, such as Figure 4a The grounding point is set at 6 o'clock between the table frame 102 and the floor 112, as shown in FIG. Figure 4a At point B shown in the figure, one or more capacitors / inductors can also be arranged at the grounding point to tune the antenna parameters such as port impedance. Figure 4b , along the 3 o'clock direction, it can be seen that the watch frame 102 and the floor 112 can be electrically connected at point B through a small impedance.

[0086] The antenna is set by setting a feeding point and a grounding point. For example, the perimeter of the frame 102 corresponds to 1λ, where λ is the operating wavelength. The excitation of the 1-times wavelength mode can be achieved by setting a feeding point and two grounding points, so that the resonance generated by the antenna can cover the operating frequency band. Exemplarily, taking the setting of an electrical connection point at the 9 o'clock direction of the frame 102 as an example, the electrical connection point is set as a feeding point, that is, a feed source is connected at the electrical connection point. A 0.5pF capacitor can be connected in series between the feed source and the frame 102.

[0087] A battery 104 is provided inside the watch 100 , and the battery 104 is used to supply power to the watch 100 .

[0088] The motor 106, microphone 107, speaker 108 and other components of the watch 100 can be connected to the circuit board 105 respectively, so that the processor on the circuit board 105 controls the corresponding components to realize the corresponding functions. The motor 106 can be used to generate vibration prompts. The motor 106 can be used for incoming call vibration prompts, and can also be used for touch vibration feedback. The microphone 107 is also called a "microphone" or a "microphone" and is used to convert sound signals into electrical signals. When making a call or sending a voice message, the user can make a sound by approaching the microphone 107 with his mouth to input the sound signal into the microphone 107. The watch 100 can be provided with at least one microphone 107. The speaker 108 is also called a "speaker" and is used to convert audio electrical signals into sound signals. The watch 100 can play music through the speaker 108, or output audio signals for hands-free calls.

[0089] One or more sensors 109 may also be provided on the circuit board 105. Such as air pressure sensor, gyroscope sensor, magnetic sensor, acceleration sensor, proximity light sensor, fingerprint sensor, touch sensor, etc. Different sensors 109 may be used to support various functions of the watch 100. For example, the pressure sensor and / or touch sensor may cooperate with the display screen 101 to realize the touch control function.

[0090] A health monitoring device 110 may also be provided in the watch 100. For example, a heart rate monitoring module, a blood pressure detection module, etc. The health monitoring device 110 may be used to detect the health signs of the user, and provide the acquired relevant data to the processor of the watch 100 or transmit it to other watches 100 for processing, so as to achieve the effect of being used for health detection.

[0091] The antenna solution provided in the embodiment of the present application can be applied to Figure 3 In the watch 100 shown. It should be noted that, Figure 3The components in the embodiment are only examples and do not constitute a limitation on the watch 100. In other embodiments, the watch 100 may further include more or fewer components, and the embodiment of the present application does not limit the specific components of the watch 100.

[0092] However, taking a watch as an example, users usually wear the watch on their wrists. Since the distance between the user's forearm and the watch is very close, the forearm will absorb the antenna radiation in the watch to a certain extent, affecting its radiation performance. The solution provided in the embodiment of the present application optimizes the magnetic field distribution in the surrounding space when the antenna in the watch is working, reduces the absorption of the antenna radiation by the human body, that is, reduces the performance degradation of the antenna in the wearing mode, thereby improving the radiation performance of the antenna in the wearing mode.

[0093] The principles of the solution provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0094] It should be understood that the antenna can radiate by converting the signal into electromagnetic waves in space. Electromagnetic waves can have electrical properties as well as magnetic properties. Taking the magnetic field as an example, since the human body is not a good conductor, when the smart watch is worn on the surface of the human body, the magnetic field close to the human body cannot generate enough induced current on the surface of the human body, resulting in a large amount of magnetic field directly entering the human body. After the magnetic field enters the human body, due to the transmission characteristics of electromagnetic waves, the magnetic field and electric field will be converted into each other in the human body, and the human body has a large loss of electric field, which will reduce the energy of the electromagnetic wave and affect the radiation performance of the antenna. Therefore, when the magnetic field distribution near the antenna (such as close to the forearm and away from the forearm) is relatively uniform, such as Figure 5a As shown in the radiation effect, the magnetic field on the side close to the human body is largely converted into an electric field and lost, so the radiation performance of the antenna will be greatly reduced compared to when the watch is not worn.

[0095] Under the same conditions, among the electromagnetic waves emitted by the antenna, the weaker the magnetic field distributed on the side close to the human body, the less magnetic field energy enters the human body, and the corresponding magnetic field converted into an electric field is smaller, and thus the human body loses less electromagnetic waves. In other words, by adjusting the magnetic field distribution around the antenna and setting the magnetic field distribution in the space close to the human body to a weak magnetic field, the loss of antenna radiation by the human body (such as the forearm) can be effectively reduced. Corresponding to smart wearable devices, by weakening the magnetic field distribution close to the human body, the electromagnetic wave loss of the antenna in the wearing mode can be reduced, and the antenna radiation performance can be improved. The solution provided in the embodiment of the present application achieves the following by weakening the magnetic field close to the human body and changing the overall magnetic field distribution around the antenna. Figure 5b The radiation effect shown. That is, a relatively weak magnetic field distribution is obtained on the side close to the forearm, and a relatively strong magnetic field distribution is obtained on the side away from the forearm. It can be understood that when the magnetic field on the side close to the human body is weakened, a smaller reduction in radiation performance can be obtained in the wearing mode, thereby obtaining better antenna performance.

[0096] As an example, the embodiment of the present application provides an antenna structure with a parasitic loop. Based on the above principle, by setting a parasitic loop structure in the watch 100, the magnetic field on the side close to the forearm can be adjusted. Figure 6a , Figure 6a The schematic diagram of the antenna structure with a parasitic loop provided in the embodiment of the present application may include a watch frame 102, a floor 112 and a parasitic loop 113. When the watch 100 is worn, the distance from the parasitic loop 113 to the user is smaller than the distance from the watch frame 102 to the user.

[0097] Please refer to Figure 6b , Figure 6b A top view of the antenna structure provided in this embodiment. In the following example, taking the case where the bezel 102 and the parasitic ring 113 are both in the shape of a ring and the floor 112 is in the shape of a circle as an example, the bezel 102, the parasitic ring 113 and the floor 112 are coaxially arranged, the parasitic ring 113 is arranged in the area below the z-axis close to the bezel 102, and the projection of the parasitic ring 113 falls in the first gap 1001 between the bezel 102 and the floor 112. In this way, the inner diameter of the parasitic ring 113 can be larger than the diameter of the floor 112, and at the same time, the outer diameter of the parasitic ring 113 can be smaller than the inner diameter of the bezel 102.

[0098] In this example, the floor 112 is arranged close to the meter frame 102, and there is a first gap 1001 between the two in the xoy plane. When the antenna is working, the current on the meter frame 102 is coupled to the floor 112, so that a current in the opposite direction to the meter frame 102 is generated on the floor 112. The parasitic ring 113 is arranged close to the meter frame 102, and there is a third gap 1003 between the two in the xoz plane. When the antenna is working, the current on the meter frame 102 is coupled to the parasitic ring 113, so that a current in the opposite direction to the meter frame 102 is generated on the parasitic ring 113.

[0099] For example, see Figure 7 , which is a cross-sectional view of the antenna when working. Figure 7 The figure shows the current distribution on the radiator when the antenna is working, and the corresponding magnetic field distribution diagram. Figure 7As shown, the two side frames 102 can be respectively distributed with currents perpendicular to the paper surface and inward, and correspondingly, the current on the floor 112 is perpendicular to the paper surface and outward. That is, the current flows in opposite directions on the frame 102 and the floor 112. Then, the direction of the magnetic field generated by the current is also different. For example, a clockwise magnetic field can be distributed around the frame 102, that is, the magnetic flux lines are clockwise. Correspondingly, a counterclockwise magnetic field can be distributed around the floor 112, that is, the magnetic flux lines are counterclockwise. In this example, a current can also be distributed on the parasitic ring 113. Since the parasitic ring 113 is distributed close to the frame 102, the current on the parasitic ring 113 can be mainly generated by coupling with the frame 102. The direction of the current on the parasitic ring 113 can be opposite to that of the frame 102 and the same as that of the floor 112. That is, a current perpendicular to the paper surface and outward can be distributed on the parasitic ring 113, and the direction of the magnetic field generated by the current on the parasitic ring 113 can be counterclockwise. This direction is opposite to the direction of the magnetic field generated by the current on the surface of the bezel 102, so it is possible to achieve a weakened adjustment of the magnetic field of the bezel 102. In this way, on the side close to the forearm, the magnetic field generated by the bezel 102 is weakened, so the forearm loss is correspondingly reduced, thereby reducing the radiation loss of the forearm to the antenna, thereby improving the radiation performance of the antenna.

[0100] Please refer to Figure 8 , Figure 8 For having Figure 6a and Figure 6b The S parameters and efficiency simulation diagram of the antenna shown in the figure. Figure 8 As shown, from the perspective of return loss (S11), after adding the parasitic loop 113 design, the resonance bandwidth of the frequency band near 1575MHz is reduced. In addition, at a frequency position lower than the main resonance near 1575MHz, the antenna can excite a smaller resonance. The smaller resonance can be a mode excited by the parasitic loop 113 after coupling.

[0101] From the perspective of radiation efficiency, after adding the parasitic ring 113 design, the radiation efficiency in the frequency band near the main resonance is significantly improved, with a peak value exceeding -8dB, which is more than 1dB higher than the solution without adding the parasitic ring 113 design.

[0102] From the perspective of system efficiency, the peak efficiency of the main resonance is more than 1 dB higher than that of the design without parasitic ring 113. Although S11 and efficiency bandwidth are reduced, this solution can provide an effect of improving radiation performance for a specific operating frequency band.

[0103] In combination with the foregoing description, it should be understood that the antenna scheme of the parasitic loop provided in the embodiment of the present application is to construct a resonant mode so that the parasitic loop structure 503 generates a current direction opposite to the watch frame 102, thereby weakening the magnetic field of the watch frame 102, but the scheme has the following two limitations. First, since the resonant mode itself has a frequency characteristic, it can only improve the radiation performance in the frequency band near a single resonance. Second, the parasitic loop 113 has a more obvious effect on improving efficiency in the scenario where the watch is not close to the arm. However, in the scenario where the watch is close to the arm, although the parasitic loop 113 can still play a role, the effect of improving efficiency is significantly reduced compared to the standard wearing scenario. Among them, the standard wearing scenario can be approximated as an arm posture model in which the watch and arm model are placed according to the placement requirements of CTIA (Cellular Telecommunications Industry Association). In other words, as the arm gradually gets closer to the watch, the efficiency improvement effect of the parasitic loop will be significantly deteriorated.

[0104] In view of the above two limitations of the parasitic loop antenna solution in improving the antenna radiation performance, the present application embodiment provides an antenna solution with an isolation ring. Figure 4a and Figure 4b The isolator antenna solution is also based on the aforementioned principle, but this solution can overcome the above two limitations of the parasitic loop antenna solution.

[0105] The following will describe in detail the antenna solution with an isolator provided in the embodiment of the present application in combination with specific examples. Take the antenna solution applied to a watch as an example, that is, Figure 3 The watch 100 shown is watch 100.

[0106] The antenna structure provided in the embodiment of the present application may include a radiator, a reference ground, and an isolator. In the embodiment of the present application, the bezel 102 may be used as the radiator of the antenna structure, the floor 112 may be used as the reference ground of the antenna structure, and the projection of the floor 112 on the plane (or xoy plane) where the bezel 102 is located is located inside the annular structure of the bezel 102. An isolator may also be provided near the bezel 102 and / or the floor 112, and the isolator is provided on the side of the bezel 102 away from the display screen 101. Please refer to Figure 9a and Figure 9b , Figure 9a and Figure 9bSchematic diagram of the antenna structure of the isolator antenna scheme provided in the embodiment of the present application. The isolator can be a plate-like structure or a ring-like structure, and the embodiment of the present application does not limit the shape of the isolator. It should be noted that the plate-like structure in the embodiment of the present application refers to a structure without hollowness, which can be square, circular, polygonal, etc., without limitation. The ring-like structure in the embodiment of the present application refers to a hollow structure, which can be regarded as a ring-like structure formed by opening a ring hole in the middle of any of the above-mentioned plate-like structures. The shape of the opening can be square, circular, polygonal, etc., without limitation. The shape of the roughly ring-like shape with a hollow center in the middle belongs to the scope of the ring structure that needs to be protected by the present invention. As an example, the isolator is a circular ring structure (which can be regarded as a circular hole in the middle of a circular plate-like structure). The isolator with a circular ring structure is referred to as an isolation ring hereinafter.

[0107] like Figure 9a As shown in the ring diagram of the antenna structure of the isolating element antenna scheme provided in the embodiment of the present application, exemplarily, in a watch with an antenna structure provided with an isolating ring, the watch frame 102 wraps the side of the watch body 100, and extends from the display screen 101 to the bottom 103 of the watch to form the side wall of the watch 100. The isolating ring 114 can be used as an isolating element of the antenna structure, and the circular hole of the isolating ring 114 is coaxially arranged with the watch frame 102. The isolating ring 114 can be a hollow annular structure made of metal. The metal material can include low carbon steel, aviation aluminum, high strength aluminum alloy, stainless steel, titanium alloy, etc. For another example, the isolating ring 114 can also be set in the watch by laser direct structuring (LDS) process or printing direct structuring (PDS) process, and the material of the isolating ring 114 can correspond to the metal material corresponding to the LDS process or the PDS process, such as silver, copper, etc. In some embodiments, the shape of the isolating ring 114 can be the same or similar to the shape of the watch frame 102 and / or the floor 112 for easy assembly. At the same time, based on the overall structural symmetry of the antenna, the magnetic field can also be adjusted.

[0108] In the following example, Figure 9a and Figure 9b The circular ring structure shown schematically identifies the table frame 102 and the isolation ring 114. Figure 9a and Figure 9b The circular structure schematically indicates the floor 112 as an example for illustration. Under different shape structures, the implementation of the isolation ring solution provided in the embodiment of the present application can refer to each other. The watch frame 102, the floor 112, and the isolation ring 114 can be coaxially arranged, and the isolation ring 114 is arranged in the area below the z-axis close to the watch frame 102.

[0109] In the embodiment of the present application, from the perspective of the entire watch, the isolation ring 114 can be located near or on the back of the watch, so that in the wearing mode, the isolation ring 114 can be located near the forearm. In some embodiments, the isolation ring 114 can be located on the bottom 103 of the watch. For example, the bottom 103 of the watch is made of plastic. From the perspective of the xoy plane, combined with Figure 2b In the back view of the xoy plane shown, the isolation ring 114 can be set on the outer surface of the bottom of the watch 103, so that when the watch 100 is in a worn state, the isolation ring 114 can be located between the floor 112 and / or the watch frame 102 and the forearm, that is, the distance from the isolation ring 114 to the user is less than the distance from the floor 112 and / or the watch frame 102 to the user. In other embodiments, the isolation member can also be set inside the bottom of the watch 103. Exemplarily, when the bottom of the watch 103 is made of non-metallic material, the isolation member of the metal material can be embedded in the bottom of the watch 103 through an injection molding process. Similar to the aforementioned example, even if the isolation member is set inside the bottom of the watch 103 and is not visible from the outside, when the watch 100 is in a worn state, the isolation member can also be located between the floor 112 and / or the watch frame 102 and the forearm.

[0110] like Figure 9a As shown, the watch frame 102 is a circular ring structure, which surrounds a receiving cavity. Along the axial direction of the circular ring structure, the projection of the floor 112 is located within the projection of the receiving cavity, and a first gap 1001 is formed between the outer wall of the floor 112 and the inner wall of the receiving cavity formed by the watch frame 102. The isolation ring 114 can be arranged near the watch frame 102 and the floor 112. Along the axial direction of the circular ring structure, the watch frame 102 and the isolation ring 114 are spaced apart, and the projection of the isolation ring 114 at least partially overlaps with the projection of the watch frame 102. Figure 9b The top view of the antenna structure of the isolator antenna solution provided by the embodiment of the present application is shown, and Figure 9a Corresponding to the annular view, the axial direction of the circular ring structure is Figure 9b In the z-direction of the isolating ring 114, the isolating ring 114 at least includes a portion disposed in the z-direction projection area of ​​the bezel 102, which is a portion of the isolating ring 114 disposed opposite to the bezel 102 in the z-direction, and a second gap 1002 is formed between the portion and the bezel 102. In other implementations, the isolating ring 114 may also include a portion disposed in the z-direction projection area of ​​the first gap 1001, or the isolating ring 114 may also include a portion disposed in the z-direction projection area of ​​the floor 112.

[0111] The isolation ring 114 and the floor 112 are connected in series by electrical connection. For example, the isolation ring 114 and the floor 112 can be electrically connected by an electrical connector 115 (see Fig.11), so that the constructed isolation element is connected in series with the reference ground, and the current on the reference ground is conducted to the isolation element. As an example, the electrical connector 115 can be an impedance to achieve a low impedance connection between the isolation element and the reference ground. The number of such low impedance connections is greater than or equal to 2, and can generally be set to 4. Please refer to Fig.10 , Fig.10 The schematic diagram of the antenna structure constructed by using the frame 102, the floor 112 and the isolation ring 114. Four electrical connection points can be set between the isolation ring 114 and the floor 112. The four electrical connection points are C, D, E, and F, which are respectively set at the 12 o'clock direction, the 3 o'clock direction, the 6 o'clock direction and the 9 o'clock direction. Correspondingly, the isolation ring 114 and the floor 112 are connected at C, D, E, and F respectively through the first electrical connector 1151, the second electrical connector 1152, the third electrical connector 1153, and the fourth electrical connector 1154.

[0112] Please refer to Fig.11 , Fig.11 A side view of an antenna structure provided in an embodiment of the present application. The section of the side view may be a xoz section passing through the geometric center of the xoy plane of the watch. The side view also includes the relevant dimensioning and description of the antenna structure. As an example, the isolation ring 114 includes a first portion 1141 disposed in the z-direction projection area of ​​the watch frame 102 and a second portion 1142 disposed in the z-direction projection area of ​​the first gap 1001. In this example, the outer radius of the watch frame 102 may be R1, the x-direction width of the watch frame 102 may be W, and the z-direction height of the watch frame 102 may be H. The radius of the floor 112 may be R2. The width of the first gap 1001 between the floor 112 and the watch frame 102 may be D. The outer radius of the isolation ring 114 may be r1, the inner radius of the isolation ring 114 may be r2, the x-direction width of the isolation ring 114 may be d, and the z-direction height of the isolation ring 114 may be h. In this example, the isolation ring 114 may not be on the same plane as the bezel 102 and the floor 112. For example, the z-direction distance from the plane where the upper surface of the isolation ring 114 is located to the plane where the lower surface of the bezel 102 is located may be g, which is the z-direction height of the second gap 1002 in the above description. As an example, in the following simulation, taking R1=23mm, R2=20mm, W=1mm, D=2mm, H=5mm, r1=23mm, r2=20mm, d=3mm, h=0.5mm, g=1.5mm as an example, 4 electrical connections may be set between the isolation ring 114 and the floor 112. The electrical connection component may be a 0 ohm low impedance component, which is located at 12 o'clock, 3 o'clock, 6 o'clock and 9 o'clock respectively. The present application does not limit the number and position of the electrical connections.

[0113] The following compares the antenna solution without an isolator with the antenna solution with an isolator to further illustrate the working mechanism and beneficial effects of the antenna solution with an isolator provided in the embodiment of the present application.

[0114] Please refer to Fig.12 , Fig.12 This is a cross-sectional view of the antenna structure without isolation ring when it is working. The antenna structure without isolation ring can be referred to Figure 4a and Figure 4b An equal-amplitude reverse current is generated between the meter frame 102 and the floor 112, such as Fig.12 The frame current I1 and floor current I2 are shown. Based on the above principle, it can be understood that this antenna structure is conducive to electromagnetic waves entering the human body through the magnetic field. At the same time, there is also a surface current I3 on ​​the surface of the floor 112 close to the human body, which is also easy to directly enter the human body, and then derive an electric field that is absorbed by the human body. In both cases, the closer the watch is worn to the human body, the greater the reduction in antenna radiation performance.

[0115] Please refer to Fig.13 , Fig.13 This is a cross-sectional view of the isolation ring antenna structure when it is working. The isolation antenna solution structure can be referred to Figure 9a and Figure 9b Since a closed isolation ring 114 is constructed between the meter frame 102 and the human body, and the isolation ring 114 is electrically connected to the floor 112, the edge of the isolation ring 114 will generate a current in the same direction as the floor current I2, such as Fig.13 The isolation loop current I4 is shown. It can be understood that since the floor current I2 is opposite to the meter frame current I1, and the isolation loop current I4 is the same as the floor current I2, the isolation loop current I4 is opposite to the meter frame current I1, which can weaken the magnetic field of the meter frame current I1 on the side close to the human body, which is beneficial to reduce the absorption of the antenna radiation by the human body.

[0116] At the same time, unlike the parasitic loop antenna solution, since the isolation ring 114 is electrically connected to the floor 112, the direction of the current on the isolation ring 114 can always be the same as the direction of the current on the floor 112, and thus always opposite to the direction of the current on the meter frame 102 (i.e., the isolation ring current I4). This reverse current is no longer limited to a single resonant mode of the above-mentioned parasitic loop antenna structure, but for all resonant modes on the meter frame 102, the isolation ring 114 can generate a reverse current accordingly, thereby solving the problem that the parasitic loop antenna solution can only improve the radiation performance in the frequency band near a single resonance.

[0117] Furthermore, the surface current I3 of the floor 112 close to the human body surface will also become smaller due to the shunting effect of the isolation ring 114, which will further reduce the absorption of the antenna radiation by the human body. At the same time, the isolation ring 114 is also conducive to the generation of a normal electric field, which is conducive to the transmission of electromagnetic waves along the human body surface, which will further reduce the absorption of the antenna radiation by the human body. Therefore, the antenna scheme provided in the embodiment of the present application can reduce the reduction in the radiation performance of the antenna in the wearing mode, thereby improving the radiation performance of the antenna in the wearing mode.

[0118] It should be noted that Fig.12 and Fig.13 I1, I2, and I3 are not exactly the same. In order to compare the current distribution of watch 1300 and watch 1400 when they are working, I1, I2, and I3 are used to refer to the frame current, floor current, and surface current respectively.

[0119] The following compares the antenna solution without a spacer and the antenna solution with a spacer by combining S-parameter simulation, and explains the radiation performance of the antenna in the wearing mode under the two solutions respectively.

[0120] Please refer to Fig.14 , which is a schematic diagram of the S parameters and efficiency simulation of the antenna under the above two schemes. Fig.14 As shown, after adding the isolation ring, the efficiency in all modes is significantly improved compared to the antenna solution without the isolation ring. Taking the frequency band near 1575MHz as an example, from the perspective of radiation efficiency, after adding the isolation ring 114, the radiation efficiency in the frequency band near 1575MHz is significantly improved, with a peak value exceeding -12dB, which is more than 5dB higher than the antenna solution without the isolation element. From the perspective of system efficiency, the peak efficiency in the frequency band near 1575MHz is also more than 4dB higher than the antenna solution without the isolation element. It can be understood that the above only takes the frequency band near 1575MHz as an example. Fig.14 It can be seen that the isolation element antenna solution can achieve similar effects in most frequency bands. Exemplarily, in the three modes of L = 1 / 2 wavelength, L = 2 / 2 wavelength, and L = 3 / 2 wavelength, L is the circumference of the outer diameter of the watch frame 102. The isolation element antenna solution has significantly improved radiation efficiency and system efficiency compared to the non-isolator antenna solution. In watches, the generally used working frequency bands may include GPS bands for positioning, Bluetooth bands for Bluetooth connections, etc., and the isolation element antenna solution can provide significant radiation performance improvements for each working frequency band of the watch.

[0121] Combination Fig.14 , please refer to Fig.15 , is the current distribution of each component in the isolation antenna solution. In order to explain it more clearly, Fig.15The following schematic diagrams of current distributions in three modes are given, namely L = 1 / 2 wavelength, L = 2 / 2 wavelength, and L = 3 / 2 wavelength, where L is the circumference of the outer diameter of the frame 102. Exemplarily, L = 46 mm. In this example, it can be found that in the above three modes, the current flow direction on the frame 102 is opposite to that of the floor 112, the current flow direction on the isolation ring 114 is the same as that of the floor 112, and is always opposite to that of the frame 102. At the same time, the distribution of the current intensity on the isolation ring 114 also basically corresponds to that of the frame 102, that is, the weak current points on the frame 102 are opposite to the weak current points on the isolation ring 114, and the strong current points on the frame 102 are opposite to the strong current points on the isolation ring 114, so that the magnetic field weakening effect of the isolation ring 114 on the frame 102 can be maximized.

[0122] Then, since in each mode, the current direction on the isolation ring 114 is opposite to the current direction on the frame 102, the magnetic field directions generated by each are opposite, and a magnetic field cancellation effect will occur in the space near the forearm. Thus, the weakening adjustment of the magnetic field generated by the frame 102 is realized. And because the distribution of the current intensity on the isolation ring 114 also basically corresponds to that of the frame 102, this is conducive to enhancing the magnetic field cancellation effect. Thus, the magnetic field intensity radiated by the frame 102 to the forearm is weak, and then the loss of the forearm to the antenna radiation is correspondingly reduced. Thus, the effect of improving the antenna radiation performance in each mode can be achieved.

[0123] The above Figure 9a-Figure 12 The antenna structure in the above is only an example of the isolation antenna solution provided by the embodiment of the present application. In this example, a second gap 1002 is formed between the first part 1401 where the isolation ring 114 and the frame 102 are oppositely arranged in the z direction, and the projection of the isolation ring 114 falls within the z - direction projection area of the frame 102 and the first gap 1001. The above Figure 13-Figure 15 As an example, the specific implementation and working effect of the isolation antenna solution are described in detail. From the above example, it can be known that in the isolation ring antenna structure, r1 = R1 and r2 = R2 can be satisfied. Please refer back Fig.11 .

[0124] It can be understood that the projection of the isolation ring 114 may not fall within the z - direction projection area of the floor 112, that is, r2 >= R2. In this case, the projection of the isolation ring 114 may partially fall within the z - direction projection area of the first gap 1001, that is, R2 = < r2 < (R2 + D), and at this time, r1 needs to satisfy r1 > (R2 + D), so as to ensure that the projection of the isolation ring 114 at least partially falls within the z - direction projection area of the frame 102, thereby realizing the weakening adjustment of the magnetic field generated by the frame 102. That is, the isolation ring 114 includes a first part 1141 arranged within the z - direction projection area of the frame 102 and a second part 1142 arranged within the z - direction projection area of the first gap 1001. Please refer back Fig.14 , Fig.14 where r1 < R1, but only as an example, on the basis of satisfying the foregoing conditions, r1 can be greater than or equal to R1, and the present application does not make any limitation thereto.

[0125] The projection of the isolation ring 114 can also fall within the z-direction projection area of the floor 112, that is, r2 < R2. In this case, the projection of the isolation ring 114 can fall within the z-direction projection areas of the bezel 102, the first gap 1001, and the floor 112. That is, at this time, r1 needs to satisfy r1 > (R2 + D), so as to ensure that at least part of the projection of the isolation ring 114 falls within the z-direction projection area of the bezel 102, thereby realizing the weakening adjustment of the magnetic field generated by the bezel 102. Please refer to Fig.16 , the isolation ring 114 includes a first part 1141 arranged within the z-direction projection area of the bezel 102, a second part 1142 arranged within the z-direction projection area of the first gap 1001, and a third part 1143 arranged within the z-direction projection area of the floor 112. Compared with Fig.10 the isolation element antenna scheme shown in Fig.16 in the isolation element antenna scheme shown, the isolation ring 114 directly extends to the area below the floor 112, shortening the wiring of the electrical connection between the isolation ring 114 and the floor 112.

[0126] The projection of the isolation ring 114 can also not fall within the first gap 1001 between the bezel 102 and the floor 112, that is, r2 >= (R2 + D), and r1 > r2, that is, r1 needs to satisfy at least r1 > (R2 + D), so as to ensure that at least part of the projection of the isolation ring 114 falls within the z-direction projection area of the bezel 102, thereby realizing the weakening adjustment of the magnetic field generated by the bezel 102. Please refer to Fig.17 , the isolation ring 114 includes a first part 1141 arranged within the z-direction projection area of the bezel 102. Compared with Fig.10 the isolation element antenna scheme shown in Fig.17 in the isolation element antenna scheme shown, the isolation ring 114 is relatively narrow and does not occupy too much space at the bottom of the watch 103, and has higher adaptability in various watches.

[0127] For the implementation of the above cases and their working effects, please refer to Figure 9a-Figure 15 the examples in

[0128] Please refer to Figure 18-Figure 20 , which is a specific example of an antenna scheme provided by an embodiment of the present application applied in an electronic device.

[0129] Please refer to Fig.18 , is a setting scheme for the antenna in the watch 200 provided in the embodiment of the present application. The watch 200 may include antenna 1 and antenna 2. Antenna 1 may include GPS L1 and BT bands, and antenna 2 may include 3G and 4G low, medium and high frequency bands (LB and MHB bands). Antenna 1 and antenna 2 both use the watch frame 102 as a radiator and the floor 112 as a reference ground. It should be noted that Fig. 20 The PCB 105 and the devices thereon can be abstracted as a floor 112. The floor 112 is Fig.18 The antenna 1 is connected to the first feed source 201 at point A1 of the meter frame 102, and connected to the ground with the floor 112 at point B1 of the meter frame 102; the antenna 2 is connected to the second feed source 202 at point A2 of the meter frame 102, and connected to the ground with the floor 112 at point B2 of the meter frame 102.

[0130] Please refer to Fig.19 , is a setting scheme of the isolation ring in the watch 200 provided in the embodiment of the present application. As shown in the back view of the xoy plane of the watch 200, the watch frame 102 can be a square ring, the display screen 101 can be a square, and the watch bottom 103 can be a circle. For ease of assembly, the shape of the isolation ring 114 can be the same or similar to the shape of the watch frame 102 and the display screen 101, and is also set to a square. The isolation ring 114 surrounds the outer edge of the watch bottom 103 in the xoy plane.

[0131] Please refer to Fig. 20 , is a side view of a watch 200 provided with an isolation ring according to an embodiment of the present application. The section of the side view may be a xoz section passing through the geometric center of the xoy plane of the watch. It is understood that the watch 200 may include the following: Figure 3Any component shown. Exemplarily, the watch 200 may include at least a display screen 101 and a bottom 103. In order to enable the electronic components of the watch 200 to work properly, a battery 104, a motor 106 and other components may also be included between the display screen 101 and the bottom 103. The watch 200 may also include at least one PCB 105 for carrying these internal components. At the same time, in order to provide a zero potential reference for the electronic components of the watch 200, a metal material may be laid in the PCB 105 to realize the function of the reference ground. The watch frame 102 may be used to provide support in all directions of the watch body, extending from the display screen 101 to the bottom 103, and at least wrapping part of the side of the watch 200. Compared with a watch in which the watch frame is only arranged on the plane where the display screen is located to surround the display screen, the watch 200 of this example is more solid, and the watch frame 102 as a radiator of the antenna structure is closer to the isolation ring 114, so that the isolation ring 114 can enhance the weakening effect of the magnetic field of the watch 200 on the side close to the human body. There is a first gap 1001 between the watch frame 102 and the floor 112. The isolation ring 114 may be disposed on the outer surface of the bottom 103 and extend from the side surface 1031 of the bottom 103 to the lower surface 1021 of the bezel 102. It is understood that there may be no gap between the bottom 103 and the isolation ring 114, or other devices may be filled between the two. Fig. 20 In order to more intuitively reflect the positional relationship between the components, the two are separated and shown, and are not used as a limitation on the bottom 103 and the isolation ring 114. In this example, the isolation ring 114 is arc-shaped in the xoz plane, so that the bottom and side of the watch 200 have a smooth transition and a more beautiful appearance. There is a second gap 1002 between the upper surface 1144 of the isolation ring 114 and the lower surface 1021 of the watch frame 102. The isolation ring 114 and the PCB 105 can be set to 4 electrical connections (only 2 of them are shown in the side view shown in the figure), and the isolation ring 114 and the PCB 105 are connected through the electrical connector 115, so that the current on the isolation ring is in the same direction as the current on the floor 112, and opposite to the current on the watch frame 102.

[0132] In this example, by testing the antenna radiation performance of the watch 200 when it works in the above-mentioned different frequency bands, it can be found that the isolation component has a certain improvement effect on the common watch working frequency bands such as GPS L1, BT band, LB and MHB band. By testing the antenna radiation efficiency of the watch 200 in each working frequency band under different arm postures, it can be found that the watch 200 with the added isolation component can not only improve the antenna radiation performance in the standard wearing scenario of the above-mentioned watch working frequency band, but also can adapt to the harsh scenario of being close to the arm, so that the antenna radiation performance does not deteriorate significantly compared with the standard wearing scenario.

[0133] From this example, it can be found that by setting an isolator in the watch, broadband improvement can be achieved, that is, the radiation performance of multiple working frequency bands in the watch can be improved. The isolator adjusts the magnetic field on the side of the watch close to the forearm, so that a relatively weak magnetic field distribution is obtained on the side close to the forearm, and a relatively strong magnetic field distribution is obtained on the side away from the forearm. The isolator can optimize the magnetic field distribution in the surrounding space when each antenna in the watch is working, reduce the human body's absorption of antenna radiation, and thus improve the radiation performance of the antenna in the wearing mode.

[0134] Furthermore, the isolation piece can achieve significant improvements in both scenarios where the wearer is worn close to the arm and in standard wearing conditions, and the antenna radiation performance in the scenario where the wearer is worn close to the arm does not deteriorate significantly compared to the scenario where the wearer is worn in standard conditions.

[0135] In the above description and simulation examples, the isolator is a closed ring-shaped metal body. In other implementations, the structure of the isolator may be different. The following examples illustrate different implementations of the isolator. It should be noted that the isolator antenna schemes under different shape structures provided in the embodiments of the present application can refer to the above embodiments for their implementation and beneficial effects.

[0136] In the above examples, the isolating member may have an appearance that is the same as or similar to that of the bezel 102 and / or the floor 112. In other implementations, the isolating member may also be other structures that are different from the appearance of the bezel 102 and / or the floor 112. The specific working mechanism and effect are similar to those in the above examples and will not be described in detail here. Fig.21 From the perspective of the section of the xoz plane or the yoz plane, the spacer can be in the shape of a thin sheet as shown in (1), or in the shape with a folded corner as shown in (2), or in the shape with a curved corner as shown in (3), etc., which are not exhaustive here. It should be noted that the spacer can be a plate structure or a ring structure. Fig.21 Shown is the edge shape of the spacer. Fig.21 The edge 1145 of the spacer shown in (1) is an example of an edge that is not bent; the edge of the spacer may also have a curved portion that is bent toward the direction where the bezel 102 is located. Fig.21 The separator bend 1146 shown in (2) is an example of a right-angle bend. Fig.21 The spacer curved portion 1147 shown in (3) is an example of an arc-shaped curve. The edge shape of the spacer can be flexibly selected based on the aesthetics and adaptability of the watch.

[0137] In other embodiments of the present application, please refer to Fig. 22, the floor 112 (reference ground) extends along the z direction toward the side close to the human body, and extends along the y direction toward the side close to the watch frame, and the projection of the extended portion 1121 of the floor 112 at least partially falls on the z-direction projection area of ​​the watch frame 102, and the distance from the extended portion 2201 to the user is smaller than the distance from the watch frame 102 to the user. The portion of the extended portion 2501 that is arranged opposite to the watch frame 102 in the z direction forms a second gap 1002. Since the extended portion 1121 is part of the floor 112, the current direction of the extended portion 1121 is the same as the current direction on the floor 112, and is always opposite to the current direction on the watch frame 102. In other words, the floor 112 and the isolation member are integrally formed. Combined with Fig.23 , Fig.23 This is the back view of the xoy plane of the watch in this example. The floor 112 extends to form the bottom of the watch, and the extension part 1121 can be set to a square shape. The working mechanism and effect of the extension part 1121 in this embodiment are similar to the first part 1141 of the isolation ring 114 in the above example, and will not be repeated here. In this solution, the floor 112 and the isolation part are integrally formed, and there is no need to achieve electrical connection through additional electrical connectors, so that the current direction of the isolation part can be the same as the current direction of the reference ground.

[0138] In other embodiments of the present application, please refer to Fig.24 , the isolating member in this example is a plate-like structure, hereinafter referred to as the isolating plate 116. A whole isolating plate 116 is constructed between the human body and the watch frame 102, and the isolating plate 116 is electrically connected to the floor 112, and the electrical connection can be set at multiple locations. Unlike the isolation ring 114, the isolating plate 116 is a complete metal plate with a plate-like structure, and its shape is not limited. The isolating plate 116 is between the human body and the watch frame 102, and a second gap 1002 is formed in the portion opposite to the watch frame 102 in the z direction, and the portion opposite to the watch frame 102 can be the edge portion 1161 of the isolating plate 116. Since the isolating plate 116 is electrically connected to the floor 112, the direction of the current on the edge portion 1161 of the isolating plate 116 is the same as the direction of the current on the floor 112, and is always opposite to the direction of the current on the watch frame 102. Combined with Fig.25 , Fig.25 This is a back view of the xoy plane of the watch in this example. The isolation plate 116 forms the bottom of the watch and can be set to a square shape. The working mechanism and effect of the edge portion 1161 in this embodiment are similar to those of the first portion 1141 of the isolation ring 114 in the above example, and will not be repeated here. In this solution, the isolation plate 116 does not need to be opened, the production is simple, and the isolation plate 116 can be directly used as the bottom of the watch to support the internal components.

[0139] In other embodiments of the present application, please refer to Fig.26, construct a circle of isolation ring 117 between the human body and the watch frame 102. The implementation method of the isolation ring 117 can refer to the isolation ring 114 in the above example. The difference in this example is that the floor 112 extends in the z direction to the side close to the human body, and the isolation ring 117 is electrically connected to the extended part 1122 of the floor 112, and the electrical connection can be set in multiple places. The floor 112 can extend toward the human body to the plane where the isolation ring 117 is located. Since the isolation ring 114 is electrically connected to the extended part 1122 of the floor 112, the direction of the current on the isolation ring 117 is the same as the direction of the current on the floor 112, and is always opposite to the direction of the current on the watch frame 102. Combined with Fig. 27 , Fig. 27 This is a back view of the xoy plane of the watch in this example. The floor 112 extends to form the bottom of the watch. The extension portion 1122 can be set to a circular shape, and the isolation ring 117 can be set to a square ring shape surrounding the outer edge of the extension portion 1122. The working mechanism and effect of the isolation ring 117 in this embodiment are similar to those of the isolation ring 114 in the above example, and will not be repeated here. In this solution, the floor 112 can be extended toward the human body to the plane where the isolation member is located, so that the floor 112 can be electrically connected to the isolation ring 117 through the extension portion 1122, shortening the wiring of the electrical connection between the isolation ring 117 and the reference ground.

[0140] It should be noted that if Figure 21-Figure 27 The deformation setting of the isolation member in the figure is only used as an example. In some other implementations, the isolation member can also achieve similar effects for other structures. Therefore, in the specific implementation process, the appropriate isolation member can be flexibly selected according to the needs, so as to effectively achieve the optimal improvement effect on the radiation performance of multiple working frequency bands. At the same time, the appropriate isolation ring shape can also be selected from the perspective of ease of assembly or aesthetics.

[0141] Thus, through the above Figure 9a-Figure 27 Based on the description, those skilled in the art should be able to have a relatively accurate understanding of the working mechanism of the isolation element provided in the embodiment of the present application and its effect on improving the antenna performance in the watch.

[0142] Although the present application has been described in conjunction with specific features and embodiments thereof, it is obvious that various modifications and combinations may be made thereto without departing from the spirit and scope of the present application. Accordingly, this specification and the drawings are merely exemplary illustrations of the present application as defined by the appended claims, and are deemed to have covered any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art may make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A wearable device, characterized in that: include: A metal frame, wherein the metal frame surrounds and forms a receiving cavity; A display screen is arranged on one side of the metal frame; A floor, spaced apart from the metal frame; as well as An isolation member, electrically connected to the floor, and disposed on a side of the metal frame away from the display screen; Along the first direction, the metal frame and the isolation member are spaced apart, the projection of the metal frame surrounds a ring-shaped area, the projection of the floor is located within the ring-shaped area, and the projection of the isolation member at least partially overlaps with the projection of the metal frame; the first direction is a direction perpendicular to the plane where the display screen is located.

2. The wearable device according to claim 1, wherein: The floor is at least partially located in the accommodating cavity, a first gap is formed between the outer wall of the floor and the inner wall of the accommodating cavity, and along the first direction, the projection of the isolation member at least partially overlaps with the projection of the first gap.

3. The wearable device according to claim 2, characterized in that: Along the first direction, a projection of the partition at least partially overlaps with a projection of the floor.

4. The wearable device according to any one of claims 1 to 3, characterized in that: The isolating element is a plate-shaped structure.

5. The wearable device according to claim 4, characterized in that: An annular hole is provided in the middle of the plate-like structure, and the annular hole is coaxially arranged with the metal frame.

6. The wearable device according to claim 5, characterized in that: The floor comprises a first floor and a first extension portion connected to the first floor, the first floor is located in the accommodating cavity, the first extension portion extends toward the annular hole along the first direction, and the isolation piece is electrically connected to the first extension portion.

7. The wearable device according to claim 4, characterized in that: The floor comprises a second floor and a second extension portion connected to the second floor, wherein the second extension portion extends toward the isolation member along the first direction and is formed integrally with the isolation member.

8. The wearable device according to any one of claims 4 to 7, characterized in that: The edge of the plate-like structure has a bent portion bent toward the direction where the metal frame is located.

9. The wearable device according to claim 8, characterized in that: The bending portion is a right-angle bending structure or an arc-shaped bending structure.

10. The wearable device according to any one of claims 1-6, 8-9, characterized in that: It also includes at least two electrical connectors connected between the floor and the isolation member.

11. The wearable device according to claim 10, wherein: The electrical connector is an impedance.

12. The wearable device according to any one of claims 1 to 11, characterized in that: It also includes a circuit board and a bottom plate, wherein the circuit board is located between the floor and the display screen, the circuit board includes at least one zero potential reference point, and the floor includes the at least one zero potential reference point.

13. The wearable device according to claim 12, wherein: The circuit board includes at least one feed source, and the at least one feed source is electrically connected to the metal frame.

14. The wearable device according to claim 13, wherein: The at least one feed source feeds a current signal into the metal frame, and the metal frame is grounded through the floor.

15. The wearable device according to any one of claims 12 to 14, characterized in that: It also includes a battery module, which is located between the display screen and the circuit board.

16. The wearable device according to any one of claims 1 to 15, characterized in that: The wearable device is a watch, and the metal frame constitutes the side wall of the watch.

17. The wearable device according to claim 16, wherein: The circuit board is the floor panel.

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