CN114843753B - Antenna device, control method thereof and electronic equipment - Google Patents

Abstract

The embodiment discloses an antenna device, a control method thereof and electronic equipment, wherein the antenna device comprises a switch assembly and an antenna, one antenna is connected with one switch assembly, one switch assembly is connected with a first resonance passage and a second resonance passage, the first resonance passage supports the antenna to resonate in an operating frequency band, and the second resonance passage supports the antenna to resonate in a non-operating frequency band; wherein: the switch component selectively conducts the first resonant passage or the second resonant passage to enable the antenna to resonate in an operating frequency band and a non-operating frequency band in a time division mode in unit time, and the average radio frequency power of the antenna in the unit time is lower than a preset power threshold value. By switching the resonant frequency, it is ensured that the average SAR does not exceed the standard in a unit time.

Description

Antenna device and control method thereof, and electronic device

Technical Field

The embodiments of the present disclosure relate to, but are not limited to, the field of antenna radio frequency technology, and in particular, to an antenna device and a control method thereof, and an electronic device.

Background technique

With the development of mobile communication technology, people are using more and more mobile terminals, especially mobile phones. However, these mobile terminals will generate electromagnetic radiation during the communication process. Electromagnetic radiation is a composite electromagnetic wave that transmits energy with mutually perpendicular electric and magnetic fields that change over time. Human life activities include a series of bioelectric activities, which are very sensitive to environmental electromagnetic waves. Therefore, electromagnetic radiation can affect and damage the human body.

In order to evaluate the impact of electromagnetic radiation from electronic devices on the human body, the industry has introduced the Specific Absorption Rate (SAR), which refers to the electromagnetic radiation energy absorbed by a unit mass of material per unit time. Taking electronic device radiation as an example, SAR refers to the ratio of radiation absorbed by the user's soft tissue. The lower the SAR value, the less radiation is absorbed by the soft tissue, and the less impact it has on the human body.

SAR is directly proportional to the RF transmission power. The higher the power, the higher the SAR value. In order to ensure that the SAR absorbed by the user's soft tissue is qualified, the conventional method used by terminal manufacturers such as mobile phones to solve the problem of SAR exceeding the standard is to reduce the RF power (power back-off), but this will reduce the communication capability of the electronic equipment and the base station.

Summary of the invention

The embodiments of the present disclosure provide an antenna device and a control method thereof, and an electronic device to ensure compliance with the specific absorption rate.

On the one hand, an embodiment of the present disclosure provides an antenna device, a switch component and an antenna, wherein an antenna is connected to a switch component, and a switch component is connected to a first resonant path and a second resonant path, wherein the first resonant path supports the antenna to resonate in a working frequency band, and the second resonant path supports the antenna to resonate in a non-working frequency band; wherein:

The switch component selects to conduct the first resonant path or the second resonant path to make the antenna resonate in the working frequency band and the non-working frequency band in a unit time, so that the average radio frequency power of the antenna in the unit time is lower than a preset power threshold.

On the other hand, an embodiment of the present disclosure further provides a control method for an antenna device, wherein the antenna device is any antenna device in the foregoing embodiments, and the control method for the antenna device includes:

The first resonant path or the second resonant path is selected to be turned on so that the antenna resonates in the working frequency band and the non-working frequency band in a unit time, so that the average radio frequency power of the antenna in the unit time is lower than a preset power threshold.

On the other hand, an embodiment of the present disclosure further provides an electronic device including the aforementioned antenna device.

The disclosed embodiment switches the resonance path through a switch component so that the antenna resonates in the working frequency band and the non-working frequency band in a unit time, and can change the radiation power of the signal without changing the total output power, thereby realizing dynamic adjustment of power. By dynamically adjusting the transmission power, it is ensured that the average SAR will not exceed the standard within a time window, and the communication quality and data throughput rate are guaranteed, giving users a better experience.

Other features and advantages of the present disclosure will be described in the following description, and partly become apparent from the description, or be understood by implementing the present disclosure. Other advantages of the present disclosure can be realized and obtained by the schemes described in the description, claims and drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings are used to provide an understanding of the technical solution of the present disclosure and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the technical solution of the present disclosure and do not constitute a limitation on the technical solution of the present disclosure. The shapes and sizes of the components in the accompanying drawings do not reflect the actual proportions and are only intended to illustrate the contents of the present disclosure.

FIG1 is a SAR value distribution diagram of a mobile terminal antenna;

FIG2 is a schematic diagram of the structure of an antenna device provided by an embodiment of the present disclosure;

FIG3 is a schematic diagram of the structure of another antenna device provided in an embodiment of the present disclosure;

FIG4 is a schematic diagram showing that the average power per unit time is less than Plimit;

FIG5 is a schematic structural diagram of another antenna device provided in an embodiment of the present disclosure;

FIG6 is a schematic diagram of the structure of another antenna device provided in an embodiment of the present disclosure;

FIG7 is a schematic diagram of the structure of an antenna device according to an application example of the present disclosure;

FIG8 is a graph showing voltage standing wave ratio at different frequency bands.

Detailed ways

The present disclosure describes multiple embodiments, but the description is exemplary rather than restrictive, and it is apparent to those skilled in the art that there may be more embodiments and implementations within the scope of the embodiments described in the present disclosure. Although many possible feature combinations are shown in the drawings and discussed in the specific embodiments, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment may be used in combination with any other feature or element in any other embodiment, or may replace any other feature or element in any other embodiment.

The present disclosure includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features, and elements disclosed in the present disclosure may also be combined with any conventional features or elements to form a unique invention scheme defined by the claims. Any features or elements of any embodiment may also be combined with features or elements from other invention schemes to form another unique invention scheme defined by the claims. Therefore, it should be understood that any feature shown and/or discussed in the present disclosure may be implemented individually or in any appropriate combination. Therefore, except for the limitations made according to the attached claims and their equivalents, the embodiments are not subject to other limitations. In addition, various modifications and changes may be made within the scope of protection of the attached claims.

In addition, when describing representative embodiments, the specification may have presented the method and/or process as a specific sequence of steps. However, to the extent that the method or process does not rely on the specific order of the steps described herein, the method or process should not be limited to the steps in the specific order described. As will be appreciated by those of ordinary skill in the art, other orders of steps are also possible. Therefore, the specific order of the steps set forth in the specification should not be interpreted as a limitation to the claims. In addition, the claims for the method and/or process should not be limited to the steps performed in the order written, and those skilled in the art can easily understand that these orders can be changed and still remain within the spirit and scope of the disclosed embodiments.

As mobile phones currently support more and more frequency bands, coupled with the popularity of full-screen phones and multiple lenses, the antenna environment is becoming increasingly harsh. Due to the limited number of antennas, one antenna may need to support many frequency bands. Therefore, it is necessary to use the antenna switch to adjust different resonance points to enable one antenna to support multiple frequency bands.

The specific absorption rate (SAR) is an internationally used indicator for evaluating the impact of radio waves on the human body. It is a safety indicator and is strictly regulated by regulatory agencies in countries (regions) around the world. The two internationally used standards are 1.6W/Kg of the Federal Communications Commission (FCC) of the United States and 2.0W/Kg of the European Union. For electromagnetic wave signals of different frequencies, the requirements of SAR regulatory agencies in different regions are slightly different. For example, for radio frequency signals below 3GHz, the FCC requires that the average SAR value within a time period of 100 seconds must not exceed the upper limit of 1.6W/Kg. Therefore, the real-time SAR value can exceed 1.6W/Kg. It is only necessary to ensure that the average value within the time window required by the regulations (such as 100ms for the FCC) is controlled within the range required by the regulations.

For a given conducted power and a given antenna, the location of the SAR hotspot (i.e., the highest SAR value) is fixed, the SAR distribution (i.e., the SAR gradient map) is fixed, and the maximum SAR value is also fixed. When the conducted power is adjusted, the location of the SAR hotspot is fixed, but the SAR value will change (the SAR value is proportional to the power). Figure 1 is a SAR value distribution diagram of a mobile terminal antenna. The solid line in the figure represents the antenna, and the dotted line represents the SAR value distribution. The SAR values on the same dotted circle are the same. The larger the dotted circle, the lower the SAR value, and the lower the RF power. The smaller the dotted circle, the higher the SAR value, and the higher the RF power, the higher the SAR hotspot value (the hotspot value at the center of the dotted circle is the highest). The regulatory agency requires that the point with the highest SAR value does not exceed the regulatory requirements, such as: FCC 1.6W/Kg, CE 2.0W/Kg.

To this end, an embodiment of the present disclosure provides an antenna device, as shown in FIG. 2 , including a switch component 20 and an antenna 30, wherein one antenna 30 is connected to one switch component 20, one switch component 20 connects more than two resonant paths but can only conduct one resonant path at the same time, one resonant path supports the antenna to resonate in one frequency band, and each resonant path supports a different frequency band, such as one switch component connects a first resonant path and a second resonant path, the first resonant path supports the antenna to resonate in a working frequency band, and the second resonant path supports the antenna to resonate in a non-working frequency band, wherein:

The switch component 20 selectively conducts the first resonant path or the second resonant path to make the antenna resonate in the working frequency band and the non-working frequency band in a unit time, so that the average RF power of the antenna in the unit time is lower than a preset power threshold.

The disclosed embodiment switches the resonance path through a switch component so that the antenna resonates in the working frequency band and the non-working frequency band in a time-sharing manner within a unit time, and can change the radiation power of the signal without changing the total output power, thereby realizing dynamic adjustment of the power. By dynamically adjusting the transmission power, it is ensured that within a unit time, the average RF power of the antenna is lower than the power threshold, and the average SAR does not exceed the standard, thereby ensuring the communication quality and data throughput rate, and providing users with a better experience.

In an exemplary embodiment, the antenna device may include N groups of switch components and antennas, each group includes a switch component and an antenna, and N is a positive integer greater than or equal to 1.

In an exemplary embodiment, the one switch component may connect a plurality of the second resonance paths, each second resonance path supporting a different frequency band.

In an exemplary embodiment, the switch component may be, for example, a tuning switch, which can change the antenna resonant frequency by connecting different matching circuits (e.g., capacitors and/or inductors) and changing the impedance of the antenna (e.g., changing the capacitance value and/or inductance value). The switch component may be connected to two or more resonant paths but can only make one resonant path conductive with the antenna at the same time. Among the multiple resonant paths connected to the switch component, one resonant path serves as the working resonant path of the antenna, and the other one or more resonant paths are non-working resonant paths. When the switch component is switched to the non-working resonant path, the antenna resonates in the non-working frequency band. When the switch component corresponds to three resonant paths, one of the resonant paths is the working resonant path, and the other two resonant paths are non-working resonant paths. The switch component switches the resonant path according to the control signal to make the antenna resonate in the non-working frequency band. The switch component may switch to a fixed one of the two non-working resonant paths each time, or may switch to different non-working resonant paths according to the average power.

In an exemplary embodiment, the switch component 20 switches the resonant path so that the antenna resonates in the working frequency band and the non-working frequency band in a unit time. It can be that, within the unit time, the switch component 20 periodically switches between the resonant path corresponding to the working frequency band (the first resonant path) and the resonant path corresponding to the non-working frequency band (the second resonant path); or, within the unit time, the switch component 20 performs non-periodic switching between the resonant path corresponding to the working frequency band and the resonant path corresponding to the non-working frequency band.

In an exemplary embodiment, the switch component 20 switches the resonant path so that the antenna resonates in the working frequency band and the non-working frequency band in a unit time. It can be that, in a unit time, the total time that the switch component 20 switches on the first resonant path is greater than or equal to or less than the total time that the switch component switches on the second resonant path.

In short, the time for the switch component 20 to switch to the resonant path corresponding to the non-working frequency band can be determined according to the average RF power of the antenna per unit time. When the antenna component switches the antenna to the resonant path corresponding to the non-working frequency band, the antenna efficiency is poor and the radiation power of the antenna is low, thereby lowering the average RF power and the SAR value. The time for the switch component 20 to switch to the resonant path corresponding to the non-working frequency band only needs to ensure that the average RF power is lower than the preset power threshold, or only needs to ensure that the average SAR value does not exceed the threshold value specified by the standard within the unit time.

For example, the time to switch to the resonant path corresponding to the non-working frequency band can be determined based on the distance between the user and the electronic device including the antenna device. For example, when the user is close to the antenna device, in order to reduce the SAR value, the time to switch to the resonant path corresponding to the non-working frequency band can be extended (including a single time extension, or extending the total time by frequent switching).

For example, it can be determined based on the frequency band supported by the resonant path. For example, the antenna currently operates in the first frequency band. In addition to corresponding to the resonant path that supports the first frequency band, the switch component also corresponds to a resonant path that supports the second frequency band. It can be determined based on the relationship between the first frequency band and the second frequency band. If the second frequency band is relatively close to the first frequency band (for example, there is partial overlap, or there is no overlap, but the difference between the closest frequencies is within a preset range), then after switching to the second frequency band, the radiation power is limitedly reduced, and it is necessary to extend the time for switching to the second frequency band to ensure that the average RF power is lower than the preset power threshold.

In an exemplary embodiment, as shown in FIG3 , the antenna device may further include a processor 10, and the processor 10 may be configured to obtain the current operating frequency band of the antenna after receiving a trigger signal, determine the resonant path that the switch component conducts, and send a control signal for switching the resonant path to the switch component. In this embodiment, the processor receives the trigger signal and sends a control signal to the switch component to control the resonant path that the switch component switches, which can make the control more precise.

In an exemplary embodiment, the trigger signal may be a sensing signal sent by a sensor, in which case the processor may be connected to the sensor, and the sensor is configured to send the trigger signal to the processor when a human body is detected approaching the antenna device. The above-mentioned sensor may be, for example, a distance sensor. In other embodiments, in addition to using a sensor for triggering, it may also be triggered by a software application (an app on an electronic device). For example, when the electronic device where the antenna device is located detects that a user has opened an application or is using a function (corresponding functional module), the software application or functional module sends a trigger signal to the processor, such as when there is an incoming call, it is triggered by the call module, or when there is a WeChat voice call, it is triggered by the WeChat application.

In an exemplary embodiment, as shown in FIG3 , the switch assembly 20 may be connected to a radio frequency transceiver, the radio frequency transceiver being configured to output a radio frequency signal, and the processor may be provided separately or may be integrated in the radio frequency transceiver. When the processor is integrated in the radio frequency transceiver, the aforementioned sensor may be connected to the processor via a baseband unit (Base Bend), that is, the sensor signal of the sensor may be first sent to the baseband unit, and then sent by the baseband unit to the processor in the radio frequency transceiver.

In an exemplary embodiment, the antenna device may also include a memory, which is connected to the processor and is used to store the frequency band and resonance information corresponding to the resonant path, so that the processor can query the frequency band and corresponding resonant parameters supported by the antenna device (referring to the parameters corresponding to when the antenna resonance point is set to a certain frequency band, such as impedance value, etc.). After obtaining the current operating frequency band of the antenna, the processor can determine which path the switch component needs to switch to based on the content stored in the memory, and then send a control signal to the switch component.

The disclosed embodiment can change the radiation power of the signal without changing the total output power by switching the resonant frequency, thereby realizing dynamic adjustment of the power. By dynamically adjusting the transmission power, it is ensured that the average SAR will not exceed the standard within a time window. For example, the antenna can transmit at a power higher than Plimit (the maximum power that meets the SAR limit requirements) in certain time periods, and at a power lower than Plimit in certain time periods, but the average power within a certain time window is ≤ Plimit, as shown in FIG4. In this way, the radiation power of the antenna can be reduced while the total output power remains unchanged, thereby realizing a reduction in SAR, ensuring communication quality and data throughput, and providing users with a better experience.

The above-mentioned electronic device may also be referred to as a terminal, which may be a mobile phone, a tablet computer, etc. In this example, a mobile phone is taken as an example for explanation, but the terminal described in the present disclosure is not limited to a mobile phone.

In an exemplary embodiment, as shown in FIG5 , the antenna device may further include a first amplifier 50, an input port of the first amplifier 50 is connected to a first output port of the RF transceiver, an output port of the first amplifier 50 is connected to the switch component 20, and the first amplifier 50 is configured to amplify the RF signal output by the RF transceiver. The first amplifier 50 may be a power amplifier, for example. 40 in the figure is a sensor connected to the processor 10.

In an exemplary embodiment, as shown in FIG. 6 , the antenna device may further include a second amplifier 60, an input port of the second amplifier 60 is connected to the switch component 20, an output port of the second amplifier 60 is connected to an input port of the RF transceiver, and the second amplifier 60 is configured to amplify a signal received by the antenna 30. The second amplifier 60 may be, for example, a low noise amplifier (LNA).

The above embodiment is described by taking one antenna as an example. In other embodiments, the antenna device may include multiple antennas, each of which is connected to a switch component.

The present disclosure also provides an antenna device control method, which is applicable to the antenna device as described above, and includes the following steps:

The first resonant path or the second resonant path is selected to be turned on so that the antenna resonates in the working frequency band and the non-working frequency band in a unit time, so that the average radio frequency power of the antenna in the unit time is lower than a preset power threshold.

For a communication device, when the antenna operates at a first resonant frequency and the first resonant frequency is within the network frequency band in which the electronic device operates, the radiated power is relatively high, and when the antenna operates at a second resonant frequency and the second resonant frequency is not within the network frequency band in which the electronic device operates, the radiated power is relatively low. The disclosed embodiment switches the resonant path so that the antenna resonates in the working frequency band and the non-working frequency band in a unit time, and can reduce the radiated power of the signal without changing the total output power. By reducing the radiated power, the average power is reduced, so that the SAR value is less than the standard value within a unit time range, thereby ensuring the communication quality and data throughput, and providing users with a better experience.

In an exemplary embodiment, the selection of conducting the first resonant path or the second resonant path may be: when a human body is detected approaching the antenna device, switching on the second resonant path so that the antenna resonates in a non-operating frequency band. By switching the resonant path when a human body is detected approaching the antenna device, the radiation power of the signal is reduced, the SAR value is reduced, and the impact of radiation on the human body can be reduced.

In an exemplary embodiment, the selectively conducting the first resonant path or the second resonant path so that the antenna resonates in the working frequency band and the non-working frequency band in a unit time may be:

Within a unit time, the switch component periodically switches between the resonant path corresponding to the working frequency band (the first resonant path) and the resonant path corresponding to the non-working frequency band (the second resonant path); or, within a unit time, the switch component non-periodically switches between the resonant path corresponding to the working frequency band and the resonant path corresponding to the non-working frequency band;

In an exemplary embodiment, the selectively conducting the first resonant path or the second resonant path so that the antenna resonates in the working frequency band and the non-working frequency band in a unit time may be:

In the unit time, the total time for the switch component to switch to the first resonant path is greater than or equal to or less than the total time for the switch component to switch to the second resonant path

In summary, the time when the switch component switches to the resonance path corresponding to the non-operating frequency band can be determined according to the average radio frequency power of the antenna during the time period.

By switching the resonant frequency, the embodiment of the present disclosure can change the radiation power of the signal without changing the total output power, realize dynamic adjustment of power, and ensure that the average power within a certain time window (i.e., unit time) is ≤ Plimit, thereby reducing SAR without changing the total output power and ensuring the communication quality of the device. The above time window can be, for example, a unit time period of a safety standard.

The following is an application example to illustrate the embodiment of the present disclosure, and Figure 7 is a schematic diagram of the application example. This example is described by taking the processor integrated in the RF transceiver as an example, and in this example, three paths are connected as an example, each path is used to achieve an antenna resonant frequency, where path 1 makes the antenna work in the a frequency band with the highest antenna efficiency, path 2 makes the antenna work in the b frequency band with the highest antenna efficiency, and path 3 makes the antenna work in the c frequency band with the highest antenna efficiency.

Assuming that the current network operating frequency band is a, the terminal operates in the a frequency band, the switch component opens the path 1, and the resonance point is set to the parameters corresponding to the a frequency band. At this time, the a frequency band has the highest efficiency, and the power is transmitted normally. The voltage standing wave ratio (VSWR) of the b frequency band and the c frequency band is poor, that is, the antenna efficiency of the antenna in the b frequency band and the c frequency band is poor, and the corresponding radiation power is also poor; the voltage standing wave ratio (VSWR) is an important indicator for measuring antenna performance. The smaller the VSWR value of the frequency band, the higher the efficiency of the antenna in this frequency band. Figure 8 is a VSWR curve diagram when the antenna operates in the a frequency band, the b frequency band and the c frequency band respectively. The frequency relationship between the a frequency band, the b frequency band and the c frequency band in Figure 8 is only an example. In other embodiments, the a frequency band and the b frequency band may not overlap, and the b frequency band and the c frequency band may not overlap. In actual application, it is sufficient to ensure that the switching resonant frequency is not within the operating frequency band range.

When it is detected that the user is close to the terminal, the processor integrated in the RF transceiver receives a trigger signal, searches for preset resonance information according to the current working frequency band a, for example, the preset resonance information records that the resonance point (resonance frequency) corresponding to the a frequency band belongs to the b frequency band (here is just an example, it can also be the c frequency band), the processor controls the antenna component to open the channel 2, and switches between channels 1 and 2 in a preset time period (or the time period when the user is close to the terminal), even if the antenna switches between the resonance frequency belonging to the a frequency band and the resonance frequency belonging to the b frequency band. In other embodiments, if the preset resonance information records that the resonance point corresponding to the a frequency band belongs to the c frequency band, the antenna component is controlled to switch between channels 1 and 3, even if the antenna switches between the resonance frequency belonging to the a frequency band and the resonance frequency belonging to the c frequency band. The current terminal working frequency band is still the a frequency band, but the antenna resonance point is in the b frequency band (or c frequency band). For the a frequency band, the antenna efficiency is poor, that is, the radiation power is poor.

Assume that the current network operating frequency band is b, the terminal operates in the b band, and the switch component opens path 2 to set the resonance point to the parameter corresponding to the b band. At this time, the b band has the highest efficiency, and the power is transmitted normally. The voltage standing wave ratio (VSWR) of the a band and the c band is poor, that is, the antenna efficiency of the antenna in the a band and the c band is poor, and the corresponding radiation power is also poor;

When it is detected that the user is close to the terminal, the processor integrated in the RF transceiver receives a trigger signal, and searches for preset resonance information according to the current working frequency band b obtained. For example, the preset resonance information records that the resonance point (resonance frequency) corresponding to the b frequency band belongs to the c frequency band (this is just an example, it can also be the a frequency band). The processor controls the antenna component to open channel 3 and switch between channels 2 and 3 in a preset time period (or a time period when the user is close to the terminal), even if the antenna switches between the resonance frequency belonging to the b frequency band and the resonance frequency belonging to the c frequency band. In other embodiments, if the preset resonance information records that the resonance point corresponding to the b frequency band belongs to the a frequency band, the antenna component is controlled to switch between channels 3 and 1, even if the antenna switches between the resonance frequency belonging to the b frequency band and the resonance frequency belonging to the a frequency band. The current terminal working frequency band is still the b frequency band, but the antenna resonance point is in other frequency bands. For the b frequency band, the antenna efficiency is poor, that is, the radiation power is poor.

The above application examples are for illustration only and are not exhaustive.

By controlling the switch component to switch between different paths at a certain time ratio, that is, the resonance point switches back and forth at a certain time ratio, the radiation power can be increased or decreased, thereby reducing the average power per unit time and reducing the SAR value.

The embodiments of the present disclosure also provide an electronic device including the antenna device. The electronic communication devices involved in the embodiments of the present disclosure may include various handheld devices with radio frequency transceiver functions, vehicle-mounted devices, virtual reality/augmented reality devices, wireless headphones, smart home devices, wearable devices, computing devices or other processing devices connected to a wireless modem, as well as various forms of user equipment (UE) (e.g., mobile phones), mobile stations (MS), terminal devices, etc.

In the description of the embodiments of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the meanings of the above terms in the present disclosure can be understood according to the circumstances.

The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

It will be appreciated by those skilled in the art that all or some of the steps, systems, and functional modules/units in the methods disclosed above may be implemented as software, firmware, hardware, and appropriate combinations thereof. In hardware implementations, the division between the functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed by several physical components in cooperation. Some or all components may be implemented as software executed by a processor, such as a digital signal processor or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or non-transitory medium) and a communication medium (or temporary medium). As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, it is well known to those of ordinary skill in the art that communication media typically contain computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

Claims (13)

1. An antenna device, characterized in that it comprises a switch component and an antenna, wherein one antenna is connected to one switch component, and one switch component connects a first resonant path and a second resonant path, wherein the first resonant path supports the antenna to resonate in a working frequency band, and the second resonant path supports the antenna to resonate in a non-working frequency band; wherein: The switch component selects to conduct the first resonant path or the second resonant path so that the antenna resonates in the working frequency band and the non-working frequency band in a unit time, so that the average radio frequency power of the antenna in the unit time is lower than a preset power threshold, wherein the antenna resonates in the working frequency band and the non-working frequency band in a unit time, including: the antenna switches back and forth between the working frequency band and the non-working frequency band in a unit time; Among them, the time for switching to the resonant path corresponding to the non-working frequency band is determined according to the distance between the user and the electronic device including the antenna device. When the user is close to the antenna device, the time for switching to the resonant path corresponding to the non-working frequency band is extended; or, the time for switching to the resonant path corresponding to the non-working frequency band is determined according to the frequency band supported by the resonant path. When the non-working frequency band is close to the working frequency band, the time for switching to the resonant path corresponding to the non-working frequency band is extended. 2. The antenna device according to claim 1, characterized in that The one switch component is connected to a plurality of the second resonance paths, and each second resonance path supports a different frequency band. 3. The antenna device according to claim 1 or 2 is characterized in that it also includes a processor, which is configured to obtain the current operating frequency band of the antenna after receiving a trigger signal, determine the resonant path that is turned on by the switch component, and send a control signal for switching the resonant path to the switch component. 4 . The antenna device according to claim 3 , wherein the processor is connected to a sensor, and the sensor is configured to send the trigger signal to the processor when a human body is detected approaching the antenna device. 5. The antenna device according to claim 1, wherein the switch component switches the resonance path so that the antenna resonates in a working frequency band and a non-working frequency band in a unit time, comprising: In the unit time, the switch component periodically switches between the first resonant path and the second resonant path; or During the unit time, the switch component performs non-periodic switching between the first resonant path and the second resonant path. 6. The antenna device according to claim 1, wherein the switch component switches the resonance path so that the antenna resonates in a working frequency band and a non-working frequency band in a unit time, comprising: Within the unit time, the total time during which the switch component switches on the first resonant path is greater than, equal to, or less than the total time during which the switch component switches on the second resonant path. 7 . The antenna device according to claim 3 , wherein the switch component is connected to a radio frequency transceiver, the radio frequency transceiver is configured to output a radio frequency signal, and the processor is integrated in the radio frequency transceiver. 8 . The antenna device according to claim 3 , further comprising a memory, wherein the memory is connected to the processor and configured to store a frequency band and resonance parameters corresponding to the resonance path. 9. A control method for an antenna device, characterized in that the antenna device comprises a switch component and an antenna, one antenna is connected to one switch component, one switch component is connected to a first resonant path and a second resonant path, the first resonant path supports the antenna to resonate in a working frequency band, and the second resonant path supports the antenna to resonate in a non-working frequency band; the control method for the antenna device comprises: Selecting to conduct the first resonant path or the second resonant path makes the antenna resonate in the working frequency band and the non-working frequency band in a unit time, so that the average radio frequency power of the antenna in the unit time is lower than a preset power threshold, wherein the antenna resonates in the working frequency band and the non-working frequency band in a unit time, including: the antenna switches back and forth between the working frequency band and the non-working frequency band in a unit time; Among them, the time for switching to the resonant path corresponding to the non-working frequency band is determined according to the distance between the user and the electronic device including the antenna device. When the user is close to the antenna device, the time for switching to the resonant path corresponding to the non-working frequency band is extended; or, the time for switching to the resonant path corresponding to the non-working frequency band is determined according to the frequency band supported by the resonant path. When the non-working frequency band is close to the working frequency band, the time for switching to the resonant path corresponding to the non-working frequency band is extended. 10. The control method according to claim 9, characterized in that the step of selectively conducting the first resonant path or the second resonant path comprises: When it is detected that a human body is approaching the antenna device, the second resonance path is switched on to make the antenna resonate in a non-operating frequency band. 11. The control method according to claim 9 or 10, characterized in that the step of selectively conducting the first resonant path or the second resonant path so that the antenna resonates in a working frequency band and a non-working frequency band in a unit time comprises: In the unit time, the switch component periodically switches between the first resonant path and the second resonant path; or During the unit time, the switch component performs non-periodic switching between the first resonant path and the second resonant path. 12. The control method according to claim 9 or 10, characterized in that the step of selectively conducting the first resonant path or the second resonant path so that the antenna resonates in a working frequency band and a non-working frequency band in a unit time comprises: Within the unit time, the total time during which the switch component switches to the first resonant path is greater than, equal to, or less than the total time during which the switch component switches to the second resonant path. 13. An electronic device, comprising the antenna device according to any one of claims 1 to 8.