Tunable antenna assembly, antenna tuning method and wearable device

Abstract

The application discloses a tunable antenna assembly, an antenna tuning method and a wearable device. The tunable antenna assembly comprises a substrate, an antenna body and a driving assembly. The substrate is provided with a signal feed point and a ground feed point. The antenna body is electrically connected with the signal feed point and the ground feed point. The driving assembly is drivingly connected with the substrate and / or the antenna body, and is used for driving the substrate and / or the antenna body to move, so as to adjust the relative position between the antenna body and the signal feed point and the ground feed point. The application drives the substrate and / or the antenna body to move through the driving assembly, adjusts the relative position between the antenna body and the signal feed point and the ground feed point, changes the resonance point of the antenna body, and then adjusts the working frequency band of the antenna body, so that the working frequency band of the antenna body is matched with the working frequency band of a base station. Through the adjustment of the relative position between the antenna body and the signal feed point and the ground feed point, the preset radiation efficiency can be achieved at different working frequency bands, the emission power of radio frequency signals is reduced, and the power consumption of an electronic device is reduced.

Description

Technical Field

[0001] This invention relates to the field of antenna technology, and more specifically to a tunable antenna assembly, an antenna tuning method, and a wearable device. Background Technology

[0002] Battery capacity in wearable electronic devices is limited by device size, preventing them from being made large. Improving battery life requires reducing standby power consumption. Wireless communication is a significant contributor to the power consumption of wearable electronic devices. Currently, antennas in wearable devices typically operate only within fixed frequency bands. When the surrounding environment changes, the radiation efficiency of antennas within a fixed frequency band may decrease, requiring the radio frequency transmitter to increase its transmission power to maintain consistent radiation performance, thus increasing power consumption. Summary of the Invention

[0003] The main objective of this invention is to provide a tunable antenna assembly, an antenna tuning method, and a wearable device, with the aim of reducing power consumption.

[0004] To achieve the above objectives, the present invention proposes a tunable antenna assembly, the tunable antenna assembly comprising:

[0005] The substrate is provided with a signal feed point and a ground feed point;

[0006] The antenna body is electrically connected to the signal feed point and the ground feed point;

[0007] A driving component is provided, which is drivingly connected to the substrate and / or the antenna body. The driving component is used to drive the substrate and / or the antenna body to move, so as to adjust the relative position between the antenna body and the signal feed point and the ground feed point.

[0008] In one embodiment, the tunable antenna assembly further includes:

[0009] A controller, electrically connected to the drive assembly, is used to control the operation of the drive assembly to drive the substrate and / or antenna body to move.

[0010] In one embodiment, the driving component includes:

[0011] The motor is electrically connected to the controller and is also driven by the base plate or antenna body;

[0012] A first conductive sheet, one end of which is fixed to the substrate and electrically connected to the signal feed point of the substrate, and the other end of which abuts against the antenna body;

[0013] The second conductive sheet has one end fixed to the substrate and electrically connected to the signal feed point of the substrate, and the other end of the second conductive sheet abuts against the antenna body.

[0014] The controller is used to control the motor to operate, thereby driving the substrate to move and causing the first conductive sheet and the second conductive sheet to move relative to the antenna body; or, the controller is used to control the motor to operate, thereby driving the antenna body to move relative to the first conductive sheet and the second conductive sheet.

[0015] In one embodiment, the number of antenna bodies is multiple;

[0016] Multiple antenna bodies are disposed on the same substrate;

[0017] Alternatively, multiple antenna bodies may be disposed on at least two of the substrates.

[0018] In one embodiment, the number of the driving components corresponds to the number of the antenna bodies;

[0019] Alternatively, the number of driving components corresponds to the number of substrates.

[0020] In one embodiment, the relative positions of some of the plurality of antenna bodies to the substrate are adjustable, and at least one of the plurality of antenna bodies is fixed to the substrate.

[0021] In one embodiment, the antenna body is arranged in an arc shape and is disposed on the periphery of the substrate.

[0022] In one embodiment, the tunable antenna assembly further includes:

[0023] A matching circuit is disposed on the substrate. The input terminal of the matching circuit is connected to the controller, and the output terminal of the matching circuit is electrically connected to the signal feed point. The matching circuit is used to adjust the impedance between the controller and the antenna body.

[0024] The present invention also proposes an antenna tuning method applied to the above-mentioned tunable antenna assembly, wherein the tunable antenna assembly includes a control substrate and an antenna body, and the substrate is provided with a signal feed point and a ground feed point; the antenna tuning method includes:

[0025] Obtain the base station's frequency band signal and location configuration table;

[0026] The relative position of the target between the antenna body and the signal feed point and the ground feed point is determined according to the frequency band signal and the location configuration table;

[0027] Drive the substrate and / or antenna body to move so as to adjust the position of the antenna body to correspond to the target relative position between the signal feed point and the ground feed point.

[0028] In one embodiment, before the step of obtaining the frequency band signal and location configuration table of the base station, the antenna tuning method further includes:

[0029] The antenna body is controlled to operate sequentially in multiple preset frequency bands, and when the antenna body is operating in each preset frequency band, the relative position information between the substrate and the antenna body is obtained when the tunable antenna assembly reaches the preset performance standard.

[0030] A location configuration table is generated based on the relative location information of each frequency band.

[0031] In one embodiment, the antenna tuning method further includes:

[0032] Obtain the location information of the tunable antenna assembly;

[0033] The operating frequency band of the antenna is determined based on the location information;

[0034] The relative positions of the antenna body with the signal feed point and the ground feed point are determined according to the operating frequency band and the location configuration table.

[0035] Drive the substrate and / or antenna body to move in order to adjust the relative position between the antenna body and the signal feed point and the ground feed point.

[0036] The present invention also proposes a wearable device, the wearable device comprising:

[0037] Display screen;

[0038] The tunable antenna assembly described above has its antenna body located below the display screen.

[0039] This invention drives the substrate and / or antenna body to move via a driving component, adjusting the relative position of the antenna body with the signal feed point and ground feed point, changing the resonant point of the antenna body, and thus adjusting the operating frequency band of the antenna body to match the operating frequency band of the base station. In this way, by adjusting the relative position of the antenna body with the signal feed point and ground feed point, a preset radiation efficiency can be achieved in different operating frequency bands, reducing the transmission power of radio frequency signals and lowering the power consumption of electronic devices. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0041] Figure 1 This is a top view schematic diagram of an embodiment of the tunable antenna assembly of the present invention;

[0042] Figure 2 This is a top view schematic diagram of another embodiment of the tunable antenna assembly of the present invention;

[0043] Figure 3 This is a top view schematic diagram of another embodiment of the tunable antenna assembly of the present invention;

[0044] Figure 4 This is a side view of an embodiment of the tunable antenna assembly of the present invention.

[0045] label name label name 100 substrate 200 Antenna body 110 signal feed point 120 ground feed point 300 conductive sheet 310 ball bearing 210 First antenna body 220 Second antenna body

[0046] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0049] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0050] In electronic devices, the antenna's position and resonant point are fixed, meaning its operating frequency band is fixed. When a user carrying the electronic device moves, the antenna switches to communicate with the corresponding base station in the area. Different base stations may operate at different frequency bands, but the antenna's operating frequency band is fixed, and the communication frequency band between the antenna and the base station is the base station's operating frequency band. When the base station's operating frequency band and the antenna's operating frequency band do not match, the antenna's radiation efficiency in the base station's operating frequency band will be lower than its radiation efficiency in its own operating frequency band. To ensure that the radiation efficiency and communication quality remain unchanged, the antenna's radio frequency signal transmission power needs to be increased. For example, if the antenna's operating frequency band is 1800–1900MHz, while the base station's operating frequency band is 2100–2200MHz, a transmission power of 100mW will result in a radiation efficiency of 60% in the 1800–1900MHz band and 30% in the 2100–2200MHz band, which meets the communication requirements with a base station operating in the 1800–1900MHz band. When the base station switches its operating frequency band to 2100–2200MHz, to achieve a radiation efficiency of 60%, the transmission power needs to be increased to 200mW. Increasing the antenna's transmission power will increase the power consumption of electronic devices, which is detrimental to their battery life.

[0051] To solve the above problems, refer to Figures 1-4 This invention proposes a tunable antenna assembly, the tunable antenna assembly comprising:

[0052] The substrate 100 is provided with a signal feed point 110 and a ground feed point 120;

[0053] The antenna body 200 is electrically connected to the signal feed point 110 and the ground feed point 120;

[0054] A driving assembly is drivingly connected to the substrate 100 and / or the antenna body 200. The driving assembly is used to drive the substrate 100 and / or the antenna body 200 to move, so as to adjust the relative position between the antenna body 200 and the signal feed point 110 and the ground feed point 120.

[0055] In this embodiment, there can be multiple ground feed points 120. An antenna body 200 may need multiple operating frequency bands, therefore multiple ground feed points 120 are needed to excite and generate multiple operating frequency bands.

[0056] In practical applications, the tunable antenna assembly of this invention can be installed in electronic devices (such as electronic watches, electronic glasses, etc.). The tunable antenna assembly communicates with base stations in the area to achieve functions such as calls and network connectivity. When a user carrying an electronic device moves to different areas, the tunable antenna will switch to the corresponding base station for communication. It is understood that when the tunable antenna assembly matches the operating frequency band of the base station, the tunable antenna assembly has high radiation efficiency in the operating frequency band of the base station, high signal transmission efficiency with the base station, and low power consumption of the electronic device. In order to reduce the power consumption of the electronic device, when the operating frequency band of the base station changes, the operating frequency band of the tunable antenna assembly also needs to be changed accordingly. The driving component drives the substrate 100 and / or the antenna body 200 to move, adjusts the relative position between the antenna body 200 and the signal feed point 110 and the ground feed point 120, changes the structure of the antenna body 200, thereby changing the current distribution of the antenna body 200, causing changes in the electromagnetic field around the antenna body 200, changing the resonant point of the antenna body 200, and thus changing the operating frequency band of the antenna body 200, so that the operating frequency band of the antenna body 200 matches the operating frequency band of the base station. When the driving component is connected to the antenna body 200, the antenna body 200 is fixed on the base plate, and the driving component is connected to the base plate to drive the base plate to move the antenna.

[0057] In practical applications, the relative positions of the antenna 200 with the signal feed point 110 and the ground feed point 120 can be recorded at different operating frequency bands while meeting antenna performance standards, generating a position configuration table. The tunable antenna assembly also includes a memory where the position configuration table is stored. When the antenna 200 is operating, the current relative position between the antenna 200 and the signal feed point 110 and the ground feed point 120 is the initial position, and the current operating frequency band is the initial operating frequency band. The tunable antenna assembly communicates with the base station to obtain the base station's current operating frequency band. When the operating frequency band of the base station is different from the initial operating frequency band of the antenna 200, the relative position of the antenna 200 with the signal feed point 110 and the ground feed point 120 corresponding to the current operating frequency band of the base station is determined by querying the position configuration table in the memory. The driving component drives the base plate 100 and / or the antenna 200 to move, so as to adjust the position of the antenna 200 to correspond to the target relative position between the signal feed point 110 and the ground feed point 120, thereby changing the resonant point of the antenna 200 and adjusting the operating frequency band of the antenna 200 to match the operating frequency band of the base station.

[0058] For example, refer to Figures 1-3The initial frequency band of the antenna 200 is 1800–1900 MHz. When the operating frequency band of the base station is 2100–2200 MHz, the driving substrate 100 rotates counterclockwise and / or the antenna 200 rotates clockwise, causing the antenna 200 to shift away from the signal feed point 110, thereby generating a resonant point of 2100–2200 MHz and adjusting the operating frequency band of the antenna 200 to 2100–2200 MHz. When the operating frequency band of the base station is 1600–1700 MHz, the driving substrate 100 rotates clockwise and / or the antenna 200 rotates counterclockwise, causing the antenna 200 to shift towards the signal feed point 110 and the ground feed point 120, thereby generating a resonant point of 1600–1700 MHz and adjusting the operating frequency band of the antenna 200 to 1600–1700 MHz.

[0059] This invention drives the substrate 100 and / or antenna 200 to move via a driving component, adjusting the relative position of the antenna 200 with the signal feed point 110 and the ground feed point 120. This changes the resonant point of the antenna 200, thereby adjusting the operating frequency band of the antenna 200 to match the operating frequency band of the base station. In this way, by adjusting the relative position of the antenna 200 with the signal feed point 110 and the ground feed point 120, a preset radiation efficiency can be achieved in different operating frequency bands, reducing the transmission power of radio frequency signals and lowering the power consumption of electronic devices.

[0060] In one embodiment, the tunable antenna assembly further includes:

[0061] A controller, electrically connected to the drive assembly, is used to control the operation of the drive assembly to drive the substrate 100 and / or the antenna 200 to move.

[0062] In this embodiment, the controller communicates with the base station to obtain the base station's current operating frequency band. The controller stores a position configuration table. When the base station's operating frequency band differs from the initial operating frequency band, the controller determines the target relative position between the antenna 200 and the signal feed point 110 and ground feed point 120 corresponding to the base station's current operating frequency band in the position configuration table. The controller then controls the drive component to operate, causing the substrate 100 and / or the antenna 200 to move, adjusting the relative position of the antenna 200 with the signal feed point 110 and ground feed point 120 to the target relative position. This changes the resonant point of the antenna 200, adjusting its operating frequency band to match the base station's operating frequency band. This allows the antenna 200 to achieve a preset radiation efficiency, reducing the transmission power of the radio frequency signal and lowering the power consumption of the electronic device.

[0063] In this embodiment, the tunable antenna assembly also includes a transmitter. The transmitter's input is connected to the controller, and its output is connected to the signal feed point 110. The transmitter is used to transmit a radio frequency signal of a corresponding power to the antenna body 200. When the environment around the antenna body 200 is good and the received signal is strong, the transmitter's transmission power can be reduced accordingly to further reduce power consumption; when the environment around the antenna body 200 is poor and the received signal is weak, the transmitter's transmission power can be increased accordingly to meet signal transmission requirements.

[0064] In one embodiment, the driving component includes:

[0065] The motor is electrically connected to the controller and is also drivenly connected to the substrate 100 or the antenna body 200;

[0066] A first conductive sheet 300, one end of which is fixed to the substrate 100 and electrically connected to the signal feed point 110 of the substrate 100, and the other end of which abuts against the antenna body 200.

[0067] The second conductive sheet 300 has one end fixed to the substrate 100 and electrically connected to the signal feed point 110 of the substrate 100, and the other end of the second conductive sheet 300 abuts against the antenna body 200.

[0068] The controller is used to control the motor to drive the substrate 100 to move, thereby causing the first conductive sheet 300 and the second conductive sheet 300 to move relative to the antenna body 200; or, the controller is used to control the motor to drive the antenna body 200 to move relative to the first conductive sheet 300 and the second conductive sheet 300.

[0069] Reference Figure 4 In this embodiment, the antenna body 200 can be fixed to the housing of the electronic device. The antenna body 200 is electrically connected to the signal feed point 110 and the ground feed point 120 via the first conductive plate 300 and the second conductive plate 300, respectively. The controller controls the motor to drive the substrate 100 and / or the antenna body 200 to rotate, adjusting the relative position between the antenna body 200 and the first and second conductive plates 300. In this embodiment, the conductive plates 300 achieve electrical connection between the antenna body 200 and the signal feed point 110 and the ground feed point 120 while maintaining a certain distance between the antenna body 200 and the substrate 100, avoiding friction caused by contact between the antenna body 200 and the substrate 100, which would hinder the relative movement between the antenna body 200 and the substrate 100.

[0070] The first conductive sheet 300 and the second conductive sheet 300 can be made of elastic elements to generate a certain pressure when the antenna body 200 abuts against the first conductive sheet 300 and the second conductive sheet 300, ensuring more stable electrical contact between the antenna body 200 and the first and second conductive sheets 300. Furthermore, a ball bearing 310 is provided at the end of the first and second conductive sheets 300 that abuts against the antenna body 200. The controller controls the motor to operate, driving the substrate 100 and / or the antenna body 200 to move, thereby driving the ball bearing 310 to rotate, making the relative movement between the antenna body 200 and the conductive sheet 300 smoother.

[0071] In one embodiment, the number of antenna bodies 200 is multiple;

[0072] Multiple antenna bodies 200 are disposed on the same substrate 100;

[0073] Alternatively, multiple antenna bodies 200 may be disposed on at least two substrates 100.

[0074] In this embodiment, the tunable antenna assembly can be configured with multiple antenna elements 200 to meet the functions of different frequency bands, such as WiFi antenna, Bluetooth antenna, cellular antenna, GPS antenna, etc. Multiple antenna elements 200 can be disposed on the same substrate 100. When the driving component drives the substrate 100 to move, it will simultaneously change the resonant point of all antennas on the substrate 100; alternatively, the driving component can drive multiple antenna elements 200 to move separately, so as to adjust the resonant point of each antenna element 200 individually.

[0075] Multiple antenna bodies 200 can also be disposed on at least two substrates 100. When it is necessary to adjust the resonant point of the antenna body 200, the driving component drives the corresponding substrate 100 to move to achieve more accurate adjustment; or drives the corresponding antenna body 200 to move to adjust the resonant point of each antenna body 200 separately.

[0076] Reference Figures 1-3In one embodiment, there are two antenna bodies 200, namely a first antenna body 210 and a second antenna body 220. The first antenna body 210 is a cellular antenna, mainly used for communication with base stations and mobile devices; the second antenna body 220 is a WiFi antenna, mainly used for communication with routers and mobile devices. The first antenna body 210 and the second antenna body 220 are disposed on the same substrate 100, and the first antenna body 210 and the second antenna body 220 have a certain height difference. The initial operating frequency band of the first antenna body 210 is LTE band 1 (1920-1980MHz). When the operating frequency band of the base station communicating with the first antenna body 210 changes to LTE band 7 (2500-2570MHz), the substrate 100 is controlled to rotate counterclockwise, or the first antenna body 210 is controlled to rotate clockwise, to adjust the resonant point of the first antenna body 210 to meet the performance requirements of the LTE band 7 frequency band.

[0077] In another embodiment, the driving component drives the first antenna body 210 or the second antenna body 220 to move, or drives the substrate 100 and the first antenna body 210 / second antenna body 220 to rotate, so that the first antenna body 210 and the second antenna body 220 partially overlap. The overlapping part of the first antenna body 210 and the second antenna body 220 couples to generate a new resonant point, thereby adjusting the resonant point of the first antenna body 210 and the second antenna body 220.

[0078] In one embodiment, the number of the driving components corresponds to the number of the antenna bodies 200;

[0079] Alternatively, the number of driving components corresponds to the number of substrates 100.

[0080] When the driving components are connected to the antenna body 200, the number of driving components corresponds to the number of antenna bodies 200, so that each antenna body 200 can be adjusted individually.

[0081] When the driving component is connected to the substrate 100, the number of driving components corresponds to the number of substrates 100, so as to adjust the antenna body 200 on each substrate 100.

[0082] In one embodiment, the relative positions of some of the plurality of antenna bodies 200 with respect to the substrate 100 are adjustable, and at least one of the plurality of antenna bodies 200 is fixed to the substrate 100.

[0083] In this embodiment, at least one antenna body 200 is fixed on the substrate 100, and its relative position with the corresponding signal feed point 110 and ground feed point 120 is also fixed. The driving component can drive the substrate 100 or other corresponding antennas to move, adjust the relative position between other antenna bodies 200 and their corresponding signal feed points 110 and ground feed points 120, and will not change the relative position between the antenna body 200 fixed on the substrate 100 and its corresponding signal feed point 110 and ground feed point 120, thereby reducing the impact of adjusting other antenna bodies 200 on the fixed antenna body 200.

[0084] In one embodiment, the antenna body 200 is arranged in an arc shape and is disposed on the periphery of the substrate 100.

[0085] In this embodiment, the substrate 100 is generally provided with other functional circuits in the center. The antenna body 200 is arranged in an arc around the periphery of the substrate 100, which can fit more closely to the edge of the substrate 100, so as to avoid the functional circuits in the center of the substrate 100 and reduce the influence of the surrounding environment on the antenna body 200.

[0086] In one embodiment, the tunable antenna assembly further includes:

[0087] A matching circuit is disposed on the substrate 100. The input terminal of the matching circuit is connected to the controller, and the output terminal of the matching circuit is electrically connected to the signal feed point 110. The matching circuit is used to adjust the impedance between the controller and the antenna body 200.

[0088] When the driving component is connected to the antenna body 200, the performance of the antenna body 200 may be affected by the driving component, resulting in reduced radiation efficiency. In this embodiment, the impedance between the controller and the antenna body 200 is adjusted by a matching circuit to reduce the impact of the driving component or the environment on the antenna and improve the antenna's radiation efficiency.

[0089] The present invention also provides an antenna tuning method applied to the above-mentioned tunable antenna assembly, the tunable antenna assembly including a control substrate and an antenna body; the antenna tuning method includes:

[0090] Obtain the base station's frequency band signal and location configuration table;

[0091] The relative position of the target between the antenna body and the signal feed point and the ground feed point is determined according to the frequency band signal and the location configuration table;

[0092] Drive the substrate and / or antenna body to move so as to adjust the position of the antenna body to correspond to the target relative position between the signal feed point and the ground feed point.

[0093] The tunable antenna assembly of this invention can be installed in electronic devices (such as electronic watches, electronic glasses, etc.). The tunable antenna assembly communicates with base stations within the area to achieve functions such as calls and internet access. When a user carrying the electronic device moves to different areas, the tunable antenna will switch to the corresponding base station for communication. It is understood that when the tunable antenna assembly matches the operating frequency band of the base station, the antenna's radiation efficiency is higher, and the power consumption of the electronic device is lower. To reduce the power consumption of the electronic device, when the operating frequency band of the base station changes, the operating frequency band of the tunable antenna assembly also needs to be changed accordingly. In this embodiment, the resonant point of the tunable antenna assembly is adjusted by driving the base plate and / or the antenna body to move, thereby adjusting the operating frequency band of the tunable antenna assembly so that the antenna body's operating frequency band matches the base station's operating frequency band. Specifically, when the driving component is connected to the antenna body, the antenna body is fixed to the base plate, and the driving component is connected to the base plate to drive the base plate to move the antenna.

[0094] In practical applications, the relative positions of the antenna body with the signal feed point and ground feed point can be recorded at different operating frequency bands while meeting antenna performance standards, generating a position configuration table. The tunable antenna assembly also includes a memory where the position configuration table is stored. Initially, the relative positions of the antenna body with the signal feed point and ground feed point are the initial positions, and the operating frequency band is the initial operating frequency band. The tunable antenna assembly communicates with the base station to obtain the base station's current operating frequency band. When the base station's operating frequency band differs from the initial operating frequency band, the relative positions of the antenna body with the signal feed point and ground feed point corresponding to the base station's current operating frequency band are determined by querying the position configuration table in the memory. This is the target relative position, driving the base plate and / or the antenna body to move, adjusting the relative positions of the antenna body with the signal feed point and ground feed point to the target relative position, thereby changing the antenna body's resonant point and adjusting the antenna body's operating frequency band to match the base station's operating frequency band.

[0095] For example, refer to Figure 1 The initial frequency band of the antenna is 1800–1900MHz. When the base station operates at 2100–2200MHz, the drive substrate rotates counterclockwise and / or the antenna rotates clockwise, causing the antenna to shift clockwise relative to the signal feed point and ground feed point to generate a resonant point at 2100–2200MHz, thus adjusting the antenna's operating frequency band to 2100–2200MHz. When the base station operates at 1600–1700MHz, the drive substrate rotates clockwise and / or the antenna rotates counterclockwise, causing the antenna to shift counterclockwise relative to the signal feed point and ground feed point to generate a resonant point at 1600–1700MHz, thus adjusting the antenna's operating frequency band to 1600–1700MHz.

[0096] This invention adjusts the relative position of the antenna body with respect to the signal feed point and ground feed point by driving the substrate and / or antenna body to change the resonant point of the antenna body, thereby adjusting the operating frequency band of the antenna body to match the operating frequency band of the base station. In this way, by adjusting the relative position of the antenna body with respect to the signal feed point and ground feed point, a preset radiation efficiency can be achieved in different operating frequency bands, reducing the transmission power of radio frequency signals and lowering the power consumption of electronic devices.

[0097] In one embodiment, before the step of obtaining the frequency band signal and location configuration table of the base station, the antenna tuning method further includes:

[0098] The antenna body is controlled to operate sequentially in multiple preset frequency bands, and when the antenna body is operating in each preset frequency band, the relative position information between the substrate and the antenna body is obtained when the tunable antenna assembly reaches the preset performance standard.

[0099] A location configuration table is generated based on the relative location information of each frequency band.

[0100] In this embodiment, the antenna can be any one of a cellular antenna, a WiFi antenna, a Bluetooth antenna, and a GPS antenna. After the antenna is tuned and matched to meet the efficiency and directivity requirements of a certain operating frequency band, the relative positions between the antenna and the signal feed point and the ground feed point are recorded, generating a position configuration table corresponding to the operating frequency band and the antenna position. For example, the antenna is controlled to operate sequentially in LTE band 1 (1920-1980MHz), LTE band 7 (2500-2570MHz), and LTE band 8 (880-915MHz). When the antenna reaches the preset performance standard, the relative positions between the substrate and the antenna are recorded as the first relative position, the second relative position, and the third relative position, respectively, generating a position configuration table for the antenna in LTE band 1 (1920-1980MHz), LTE band 7 (2500-2570MHz), and LTE band 8.

[0101] When the operating frequency band of the base station changes, the relative position between the antenna body and the signal feed point and the ground feed point corresponding to the operating frequency band of the base station is determined by querying the location table. The target relative position between the antenna body and the signal feed point and the ground feed point is then determined, and the antenna body or substrate is driven to move so that the relative position between the antenna body and the signal feed point and the ground feed point reaches the target relative position to match the operating frequency band of the base station.

[0102] In one embodiment, the antenna tuning method further includes:

[0103] Obtain the location information of the tunable antenna assembly;

[0104] The operating frequency band of the antenna is determined based on the location information;

[0105] The relative positions of the antenna body with the signal feed point and the ground feed point are determined according to the operating frequency band and the location configuration table.

[0106] Drive the substrate and / or antenna body to move in order to adjust the relative position between the antenna body and the signal feed point and the ground feed point.

[0107] In this embodiment, the function of the antenna body can be determined based on the location information of the tunable antenna assembly, thereby determining the operating frequency band of the antenna body. For example, when the location information of the tunable antenna body is at home, it indicates that the tunable antenna assembly needs to use WiFi functionality. Therefore, the target relative position between the antenna body and the signal feed point and the ground feed point when operating in the WiFi frequency band is determined according to the location configuration table, and the substrate and / or antenna body are moved to adjust the position of the antenna body to correspond to the target relative position between the signal feed point and the ground feed point. When the location information of the tunable antenna body is on a mountain, it indicates that the tunable antenna assembly needs to use 4G functionality. Therefore, the target relative position between the antenna body and the signal feed point and the ground feed point when operating in the 4G frequency band is determined according to the location configuration table, and the substrate and / or antenna body are moved to adjust the position of the antenna body to correspond to the target relative position between the signal feed point and the ground feed point.

[0108] The present invention also provides a wearable device, the wearable device comprising:

[0109] Display screen;

[0110] The tunable antenna assembly described above has its antenna body located below the display screen.

[0111] In this embodiment, the antenna is positioned below the display screen, maximizing its distance from the human body and making the surrounding environment more conducive to radiation. The antenna's radiation direction is directly above the display screen. If metal lugs are present around the antenna, the antenna can be positioned at a certain distance from the metal lugs to reduce the influence of the metal on the antenna.

[0112] The detailed structure of the tunable antenna assembly can be referred to in the above embodiments, and will not be repeated here. It is understood that since the above-mentioned tunable antenna assembly is used in the wearable device of the present invention, the embodiments of the wearable device of the present invention include all the technical solutions of all the embodiments of the above-mentioned tunable antenna assembly, and the technical effects achieved are exactly the same, and will not be repeated here.

[0113] The above are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A tunable antenna assembly, characterized by The tunable antenna assembly comprises: a substrate provided with a signal feed point and a ground feed point; an antenna body electrically connected with the signal feed point and the ground feed point; a driving assembly, which is drivingly connected with the substrate and / or the antenna body, and is used to drive the substrate and / or the antenna body to move so as to adjust the relative position between the antenna body and the signal feed point and the ground feed point; when the antenna body is driven to deviate in a direction away from the signal feed point and the ground feed point, the operating frequency band of the antenna body is increased; and when the antenna body is driven to deviate in a direction close to the signal feed point and the ground feed point, the operating frequency band of the antenna body is decreased; the tunable antenna assembly further comprises: a controller electrically connected with the driving assembly, and used to control the driving assembly to work so as to drive the substrate and / or the antenna body to move; the driving assembly comprises: a motor electrically connected with the controller, and further drivingly connected with the substrate or the antenna body; a first conductive sheet, one end of which is fixed on the substrate and electrically connected with the signal feed point of the substrate, and the other end of which is in abutment with the antenna body; a second conductive sheet, one end of which is fixed on the substrate and electrically connected with the ground feed point of the substrate, and the other end of which is in abutment with the antenna body; the controller is used to control the motor to work so as to drive the substrate to move, and drive the first conductive sheet and the second conductive sheet to move relative to the antenna body; or the controller is used to control the motor to work so as to drive the antenna body to move relative to the first conductive sheet and the second conductive sheet.

2. The tunable antenna assembly of claim 1, wherein, The number of the antenna bodies is plural; the plural antenna bodies are arranged on the same substrate; or, the plural antenna bodies are arranged on at least two substrates.

3. The tunable antenna assembly of claim 2, wherein, The number of the driving assemblies corresponds to the number of the antenna bodies; or, the number of the driving assemblies corresponds to the number of the substrates.

4. The tunable antenna assembly of claim 2, wherein, The relative position between part of the plural antenna bodies and the substrate is adjustable, and at least one of the plural antenna bodies is fixed on the substrate.

5. The tunable antenna assembly of claim 3, wherein, The antenna body is arranged in a circular arc and arranged on the circumferential side of the substrate.

6. The tunable antenna assembly of claim 1, wherein, The tunable antenna assembly further comprises: a matching circuit arranged on the substrate, an input end of the matching circuit being connected with the controller, and an output end of the matching circuit being electrically connected with the signal feed point; the matching circuit is used to adjust the impedance between the controller and the antenna body.

7. A method of tuning an antenna, applied to the tunable antenna assembly according to any one of claims 1-6, the tunable antenna assembly comprising a control substrate and an antenna body, the substrate being provided with a signal feed point and a ground feed point; characterized in that, The antenna tuning method comprises: obtaining the frequency band signal and the position configuration table of a base station; determining the target relative position between the antenna body and the signal feed point and the ground feed point according to the frequency band signal and the position configuration table; driving the substrate and / or the antenna body to move so as to adjust the position of the antenna body to the target relative position between the signal feed point and the ground feed point.

8. The antenna tuning method of claim 7, wherein, Before the step of obtaining the frequency band signal and the position configuration table of the base station, the antenna tuning method further comprises: The control antenna body works in multiple preset frequency bands in turn, and when the antenna body works in each preset frequency band, the relative position information between the substrate and the antenna body when the tunable antenna assembly reaches a preset performance standard is obtained; A position configuration table is generated according to the relative position information of each frequency band.

9. The antenna tuning method of claim 8, wherein, The antenna tuning method further comprises: Obtaining position information of the tunable antenna assembly; Determining the working frequency band of the antenna body according to the position information; Determining the relative position between the antenna body and the signal feed point and the ground feed point according to the working frequency band and the position configuration table; Driving the substrate and / or antenna body to move to adjust the relative position between the antenna body and the signal feed point and the ground feed point.

10. A wearable device, comprising: The wearable device comprises: A display screen; The tunable antenna assembly according to any one of claims 1-6, wherein the antenna body of the tunable antenna assembly is arranged below the display screen.

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