CN110474167B - Electromagnetic wave control method and device - Google Patents
Electromagnetic wave control method and device Download PDFInfo
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- CN110474167B CN110474167B CN201910790719.2A CN201910790719A CN110474167B CN 110474167 B CN110474167 B CN 110474167B CN 201910790719 A CN201910790719 A CN 201910790719A CN 110474167 B CN110474167 B CN 110474167B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
- H01Q3/34—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means
- H01Q3/36—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means with variable phase-shifters
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Abstract
The invention discloses a method and a device for controlling electromagnetic waves, wherein the method comprises the following steps: when an object is detected to be close to the antenna array, determining a phase adjustment mode of a radiation beam of each antenna unit in the antenna array so as to enable the phase of the radiation beam of each antenna unit to be a target phase; the phase adjustment mode comprises phase adjustment and non-phase adjustment; and superposing and synthesizing the radiation beams of the antenna units with the phases as the target phases to obtain the target electromagnetic wave in the preset direction. The invention controls the direction of the radiation wave beam of each antenna unit in the antenna array, further controls the direction of the superposed and synthesized electromagnetic wave, and leads the direction of the synthesized electromagnetic wave to be the direction far away from the human body, thereby realizing the reduction of SAR, not needing to reduce the transmitting power, ensuring the radio frequency performance and further ensuring the signal quality.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to an electromagnetic wave control method and apparatus.
Background
Electronic devices such as cell phones have transmitting antennas that generate electromagnetic radiation when transmitting signals. SAR (Specific Absorption Rate) is an electromagnetic wave energy Absorption ratio of a mobile phone or other electronic equipment, and is defined as: under the action of the external electromagnetic field, an induction electromagnetic field is generated in the human body. In consideration of safety, the SAR value of electronic equipment such as a mobile phone and the like cannot be larger than the specified range of the safe SAR. Therefore, when a human body or an object approaches an electronic device such as a mobile phone, it is necessary to adjust an electromagnetic wave absorption ratio of the electronic device such as the mobile phone so that the electromagnetic wave absorption ratio is not greater than a range specified by the safety SAR.
However, when the SAR is controlled by the conventional method, the direction of the electromagnetic wave radiated by the antenna is not adjusted, but the transmission power of the antenna is reduced, which causes a problem of reduction of the radio frequency performance.
Disclosure of Invention
An embodiment of the present invention provides an electromagnetic wave control method and apparatus, which are used to solve the problem in the prior art that when controlling an SAR, a mode of reducing transmission power is adopted, so that radio frequency performance is reduced.
In order to solve the technical problem, the embodiment of the application adopts the following technical scheme: a method of controlling electromagnetic waves, comprising:
when an object is detected to be close to the antenna array, determining a phase adjustment mode of a radiation beam of each antenna unit in the antenna array so as to enable the phase of the radiation beam of each antenna unit to be a target phase;
the phase adjustment mode comprises phase adjustment and non-phase adjustment;
and superposing and synthesizing the radiation beams of the antenna units with the phases as the target phases to obtain the target electromagnetic wave in the preset direction.
Optionally, the determining a phase adjustment manner of a radiation beam of each antenna unit in the antenna array so that a phase of the radiation beam of each antenna unit is a target phase includes:
determining the target phase of the main radiation beam of each antenna unit according to the position of the object;
and according to each target phase, performing phase adjustment on the phase of a main radiation beam in at least one antenna unit in the antenna array so as to enable the phase of the radiation beam of each antenna unit to be the target phase.
Optionally, the method further includes:
when no object is detected to be close to the antenna array, phase adjustment is performed on the phase of the radiation main beam in at least one antenna unit in the antenna array according to a preset phase of the radiation main beam of each antenna unit, so that the phase of the radiation main beam of each antenna unit is a target phase;
or, when it is detected that no object is close to the antenna array, the phase of the main radiation beam of each antenna unit in each antenna array is kept unchanged, so that the current phase of the main radiation beam of each antenna unit is the target phase.
Optionally, the determining the target phase of the main radiation beam of each antenna unit according to the position of the object specifically includes:
determining a relative position of the object to the antenna array;
determining the beam direction of the target electromagnetic wave to be a direction far away from the object based on the relative position of the object;
and determining the target phase of the radiation main beam of each antenna unit according to the direction of the target electromagnetic wave.
Optionally, the performing phase adjustment specifically includes:
and performing phase adjustment on the phase of the radiation main beam of the antenna unit by using a phase shifter corresponding to the antenna unit so as to enable the phase of the radiation main beam of the adjusted antenna unit to be a target phase.
Optionally, the phase adjusting the phase of the radiation main beam of the antenna unit by using the phase shifter corresponding to the antenna unit, so that the adjusted phase of the radiation main beam of the antenna unit is a target phase, specifically including:
receiving an initial radio frequency current by using a phase shifter corresponding to the antenna unit;
according to the target phase of the radiation main beam of the antenna unit, carrying out phase adjustment on the received initial radio frequency current by using a phase shifter corresponding to the antenna unit to obtain a target radio frequency current corresponding to the antenna unit;
and outputting the target radio frequency current to the corresponding antenna unit so as to enable the phase of the main radiation beam of the antenna unit to be the target phase of the main radiation beam of the antenna unit.
Optionally, the method further includes: detecting whether an object approaches the antenna array by using a sensor to obtain a first detection result or a second detection result; wherein the first detection result is: detecting an object near the antenna array: the second detection result is: no object is detected near the antenna array.
Optionally, before the phase adjustment of the radiation main beam in the at least one antenna unit, the method further includes: and adjusting the amplitude of the main radiation beam of each antenna unit to enable the amplitude of the main radiation beam of each antenna unit to be a preset value.
Optionally, the adjusting the amplitude of the main radiation beam of each antenna unit specifically includes: and adjusting the amplitude of the initial radio frequency current by using a radio frequency chip so as to enable the amplitude of the radio frequency current received by each antenna unit to be a preset value.
In order to solve the above technical problem, the present application also provides an electromagnetic wave control apparatus, including:
the first adjusting module is used for determining a phase adjusting mode of a radiation beam of each antenna unit in the antenna array under the condition that an object is detected to be close to the antenna array, so that the phase of the radiation beam of each antenna unit is a target phase; the phase adjustment mode comprises phase adjustment and non-phase adjustment;
and the control module is used for superposing and synthesizing the radiation beams of the antenna units with the phases as the target phases to obtain the target electromagnetic waves in the preset direction.
Optionally, the first adjusting module is configured to:
determining the target phase of the main radiation beam of each antenna unit according to the position of the object;
and according to each target phase, performing phase adjustment on the phase of a main radiation beam in at least one antenna unit in the antenna array so as to enable the phase of the radiation beam of each antenna unit to be the target phase.
Optionally, the apparatus further includes a second adjusting module, where the second adjusting module is configured to: when no object is detected to be close to the antenna array, phase adjustment is performed on the phase of the radiation main beam in at least one antenna unit in the antenna array according to a preset phase of the radiation main beam of each antenna unit, so that the phase of the radiation main beam of each antenna unit is a target phase;
or, when it is detected that no object is close to the antenna array, the phase of the main radiation beam of each antenna unit in each antenna array is kept unchanged, so that the current phase of the main radiation beam of each antenna unit is the target phase.
Optionally, when the first adjusting module is configured to determine the target phase of the main radiation beam of each antenna unit according to the position of the object, the first adjusting module is specifically configured to: determining a relative position of the object to the antenna array;
determining the beam direction of the target electromagnetic wave to be a direction far away from the object based on the relative position of the object;
and determining the target phase of the radiation main beam of each antenna unit according to the direction of the target electromagnetic wave.
Optionally, when the first adjusting module and the second adjusting module perform phase adjustment, the first adjusting module and the second adjusting module are specifically configured to:
and performing phase adjustment on the phase of the radiation main beam of the antenna unit by using a phase shifter corresponding to the antenna unit so as to enable the phase of the radiation main beam of the adjusted antenna unit to be a target phase.
Optionally, the first adjusting module and the second adjusting module are configured to perform phase adjustment on a phase of a radiation main beam of the antenna unit by using a phase shifter corresponding to the antenna unit, so that when the phase of the radiation main beam of the adjusted antenna unit is a target phase, the first adjusting module and the second adjusting module are specifically configured to:
receiving an initial radio frequency current by using a phase shifter corresponding to the antenna unit;
according to the target phase of the radiation main beam of the antenna unit, carrying out phase adjustment on the received initial radio frequency current by using a phase shifter corresponding to the antenna unit to obtain a target radio frequency current corresponding to the antenna unit;
and outputting the target radio frequency current to the corresponding antenna unit so as to enable the phase of the main radiation beam of the antenna unit to be the target phase of the main radiation beam of the antenna unit.
Optionally, the apparatus further includes a detection module, where the detection module is configured to detect whether an object is close to the antenna array by using a sensor, so as to obtain a first detection result or a second detection result; wherein the first detection result is: detecting that an object is close to the antenna array; the second detection result is: no object is detected near the antenna array.
Optionally, the apparatus further includes a third adjusting module, where the third adjusting module is configured to: and adjusting the amplitude of the main radiation beam of each antenna unit to enable the amplitude of the main radiation beam of each antenna unit to be a preset value.
Optionally, the third adjusting module is specifically configured to: and adjusting the amplitude of the initial radio frequency current by using a radio frequency chip so as to enable the amplitude of the radio frequency current received by each antenna unit to be a preset value.
The embodiment of the invention has the beneficial effects that: the direction of the radiation main beam of each antenna unit in the antenna array is controlled, and then the direction of the electromagnetic wave synthesized by superposition is controlled, so that the direction of the synthesized electromagnetic wave is the direction far away from a human body, SAR reduction is realized, the emission power does not need to be reduced, the radio frequency performance is guaranteed, and further the signal quality is guaranteed.
Drawings
FIG. 1 is a flow chart of an electromagnetic wave control method according to the present invention;
FIG. 2 is a flow chart of an electromagnetic wave control method according to the present invention;
FIG. 3 is a flowchart illustrating an electromagnetic wave control method according to the present invention;
FIG. 4 is a flowchart illustrating an electromagnetic wave control method according to the present invention;
FIG. 5 is a flowchart illustrating an electromagnetic wave control method according to the present invention;
FIG. 6 is a block diagram showing the structure of an electromagnetic wave control device according to the present invention;
fig. 7 is a block diagram of a millimeter wave antenna module in the electromagnetic wave control device according to the embodiment of the present invention.
Detailed Description
Various aspects and features of the present application are described herein with reference to the drawings.
It will be understood that various modifications may be made to the embodiments of the present application. Accordingly, the foregoing description should not be construed as limiting, but merely as exemplifications of embodiments. Those skilled in the art will envision other modifications within the scope and spirit of the application.
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with a general description of the application given above and the detailed description of the embodiments given below, serve to explain the principles of the application.
These and other characteristics of the present application will become apparent from the following description of preferred forms of embodiment, given as non-limiting examples, with reference to the attached drawings.
It should also be understood that, although the present application has been described with reference to some specific examples, a person of skill in the art shall certainly be able to achieve many other equivalent forms of application, having the characteristics as set forth in the claims and hence all coming within the field of protection defined thereby.
The above and other aspects, features and advantages of the present application will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.
Specific embodiments of the present application are described hereinafter with reference to the accompanying drawings; however, it is to be understood that the disclosed embodiments are merely exemplary of the application, which can be embodied in various forms. Well-known and/or repeated functions and constructions are not described in detail to avoid obscuring the application of unnecessary or unnecessary detail. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present application in virtually any appropriately detailed structure.
The specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," which may each refer to one or more of the same or different embodiments in accordance with the application.
An embodiment of the present invention provides an electromagnetic wave control method, as shown in fig. 1, specifically including the following steps:
step S101, when an object is detected to be close to an antenna array, determining a phase adjustment mode of a radiation beam of each antenna unit in the antenna array so as to enable the phase of the radiation beam of each antenna unit to be a target phase; the phase adjustment mode comprises phase adjustment and non-phase adjustment;
in this step, a sensor may be specifically used to detect whether an object is close to the antenna array, so as to obtain a first detection result or a second detection result; wherein the first detection result is: detecting that an object is close to the antenna array; the second detection result is: no object is detected near the antenna array.
Step S102, performing superposition synthesis on the radiation beams of each antenna unit with the target phase, to obtain a target electromagnetic wave in a predetermined direction.
In this embodiment, an antenna array is disposed in the electronic device. Because the directivity of a single antenna is limited, two or more single antennas working at the same frequency are fed and spatially arranged according to certain requirements to form an antenna array; each antenna in the antenna array is referred to as an antenna element. Specifically, each antenna unit can have radiation, and the radiation field of the antenna far zone is theoretically analyzed, so that a directional diagram function is obtained, and an antenna directional diagram is calculated and drawn; the antenna pattern is generally in the shape of petals, known as lobes or beams. The lobe containing the maximum radiation direction is called a main lobe (radiation main beam), the other lobes are called side lobes or side lobes and are divided into a first side lobe, a second side lobe and the like, and the beam opposite to the main lobe direction is called a back lobe. When the phase is adjusted, the phase of the main radiation beam (main lobe) can be adjusted, and correspondingly, while the phase of the main radiation beam is adjusted, the phases of the side lobes and the back lobe also change correspondingly. In the beam superposition synthesis, the main radiation beam of each antenna unit is mainly used for synthesis, and the side lobe and the back lobe are small and can be ignored.
According to the embodiment of the invention, the phase of the radiation main beam of each antenna unit in the antenna array is adjusted, so that the direction of the superposed and synthesized electromagnetic wave can be controlled to be a preset direction, and the control of the specified direction of the electromagnetic wave is realized.
Another embodiment of the present invention provides an electromagnetic wave control method, as shown in fig. 2, including the following steps:
step S201, when an object is detected to be close to an antenna array, determining a target phase of a main radiation beam of each antenna unit according to the position of the object;
the determining the target phase of the main radiation beam of each antenna unit in this step specifically includes: determining a relative position of the object to the antenna array; determining the beam direction of the target electromagnetic wave to be a direction far away from the object based on the relative position of the object; and determining the target phase of the radiation main beam of each antenna unit according to the direction of the target electromagnetic wave.
Step S202, performing phase adjustment on the phase of the main radiation beam in at least one antenna unit in the antenna array according to each target phase, so that the phase of the radiation beam of each antenna unit is the target phase.
Step S203, superimpose and combine the radiation beams of each antenna unit with the target phase, so as to obtain a target electromagnetic wave in a predetermined direction.
In the embodiment of the invention, when an object is detected to be close to the equipment, the position of the object is determined by taking the antenna array as a reference object, and then the target phase of the radiation main beam of each antenna unit is determined, so that the direction of the finally synthesized electromagnetic wave is the direction departing from the object, and thus the SAR can be reduced, the emission power does not need to be reduced, and the radio frequency performance and the signal quality are ensured.
Another embodiment of the present invention provides an electromagnetic wave control method, as shown in fig. 3, including the following steps:
step S301, when an object is detected to be close to an antenna array, determining the relative position of the object to the antenna array;
the relative position of the object is determined by using the antenna array as a reference.
Step S302, determining the beam direction of the target electromagnetic wave to be a direction far away from the object based on the relative position of the object; the step determines the direction of the finally synthesized target electromagnetic wave by determining the relative position of the object so that the synthesized target electromagnetic wave can be far away from the human body, thereby reducing the SAR.
Step S303, determining a target phase of the radiation main beam of each antenna unit according to the direction of the target electromagnetic wave.
Step S304, according to each of the target phases, a phase shifter corresponding to the antenna unit is used to perform phase adjustment on the phase of the main radiation beam of the antenna unit, so that the adjusted phase of the main radiation beam of the antenna unit is the target phase.
Specifically, when performing phase adjustment, the method includes: receiving an initial radio frequency current by using a phase shifter corresponding to the antenna unit; according to the target phase of the radiation main beam of the antenna unit, carrying out phase adjustment on the received initial radio frequency current by using a phase shifter corresponding to the antenna unit to obtain a target radio frequency current corresponding to the antenna unit; and outputting the target radio frequency current to the corresponding antenna unit so as to enable the phase of the main radiation beam of the antenna unit to be the target phase of the main radiation beam of the antenna unit.
In the adjusting step, the phase of the radiation main beam of each antenna array in the antenna array may be adjusted according to an actual situation, or the phase of the radiation main beam of only some antenna units in the antenna array may be adjusted. For example, when the calculated target phase of the main radiation beam of a certain antenna element is the same as the current phase thereof, the phase of the main radiation beam of the antenna element is not adjusted. That is, when performing phase adjustment, only the phase of the main radiation beam of the antenna unit with the target phase different from the current phase is subjected to phase adjustment, so as to ensure that the phase of the main radiation beam of each antenna unit, which is finally used for synthesizing the target electromagnetic wave, is the target phase.
Step S305, superimpose and combine the radiation beams of each antenna unit with the target phase, to obtain a target electromagnetic wave in a predetermined direction.
According to the embodiment of the invention, when an object is detected to be close to the equipment, the position of the object is determined by taking the antenna array as a reference object, and then the direction far away from the object is determined to be the direction of the target electromagnetic wave, so that the target phase of the main radiation beam of each antenna unit is reversely deduced. Therefore, the direction of the finally synthesized electromagnetic wave is the direction departing from the object, the SAR can be reduced, the emission power does not need to be reduced, and therefore the radio frequency performance and the signal quality are guaranteed.
Another embodiment of the present invention provides an electromagnetic wave control method, as shown in fig. 4, including the steps of:
step S401, when an object is detected to be close to an antenna array, determining the relative position of the object to the antenna array;
step S402, determining the beam direction of the target electromagnetic wave to be a direction far away from the object based on the relative position of the object;
step S403, determining a target phase of the main radiation beam of each antenna unit according to the direction of the target electromagnetic wave.
Step S404, adjusting the amplitude of the main radiation beam of each antenna unit to make the amplitude of the main radiation beam of each antenna unit be a preset value;
in the specific implementation process of this step, the amplitude adjustment can be performed on the initial radio frequency current by using the radio frequency chip, so that the amplitude of the radio frequency current received by each antenna unit is the maximum value, and the intensity of the electromagnetic wave is synthesized to ensure the signal quality.
Step S405, according to each of the target phases, performing phase adjustment on the phase of the main radiation beam of the antenna unit by using the phase shifter corresponding to the antenna unit, so that the adjusted phase of the main radiation beam of the antenna unit is the target phase.
Step S406, superimpose and combine the radiation beams of each antenna unit with the target phase, so as to obtain a target electromagnetic wave in a predetermined direction.
In this embodiment, before the phase of the antenna unit is adjusted, the amplitude of the radiation main beam is adjusted to make the radiation main beam reach the maximum value, so as to ensure the amplitude of the synthesized target electromagnetic wave and ensure the signal quality during communication.
An embodiment of the present invention provides an electromagnetic wave control method, as shown in fig. 5, including the following steps:
step S501, when it is detected that no object is close to the antenna array, performing phase adjustment on a phase of a radiation main beam in at least one antenna unit in the antenna array according to a preset phase of the radiation main beam of each antenna unit, so that the phase of the radiation main beam of each antenna unit is a target phase;
or, when it is detected that no object is close to the antenna array, the phase of the main radiation beam of each antenna unit in each antenna array is kept unchanged, so that the current phase of the main radiation beam of each antenna unit is the target phase.
In the step of adjusting the phase, a specific adjusting method is to perform phase adjustment on the phase of the radiation main beam of the antenna unit by using a phase shifter corresponding to the antenna unit, so that the adjusted phase of the radiation main beam of the antenna unit is a target phase. The phase adjusting of the phase of the radiation main beam of the antenna unit by using the phase shifter corresponding to the antenna unit so as to make the adjusted phase of the radiation main beam of the antenna unit be a target phase specifically includes: receiving an initial radio frequency current by using a phase shifter corresponding to the antenna unit; according to the target phase of the radiation main beam of the antenna unit, carrying out phase adjustment on the received initial radio frequency current by using a phase shifter corresponding to the antenna unit to obtain a target radio frequency current corresponding to the antenna unit; and outputting the target radio frequency current to the corresponding antenna unit so as to enable the phase of the main radiation beam of the antenna unit to be the target phase of the main radiation beam of the antenna unit.
Step S502, superimpose and combine the radiation beams of each antenna unit with the target phase, so as to obtain a target electromagnetic wave in a predetermined direction.
In the embodiment of the invention, when no object is detected to be close to the antenna array, the SAR does not need to be adjusted, so that the direction of the synthesized electromagnetic wave can be adjusted according to actual needs to enable the direction of the synthesized electromagnetic wave to be a preset direction; or the direction of the synthesized electromagnetic wave is not adjusted so as to keep the direction of the electromagnetic wave unchanged as the current direction.
An embodiment of the present invention provides an electromagnetic wave control device, as shown in fig. 6, including:
a first adjusting module 1, configured to determine, when an object is detected to be close to an antenna array, a phase adjustment manner of a radiation beam of each antenna unit in the antenna array, so that a phase of the radiation beam of each antenna unit is a target phase; the phase adjustment mode comprises phase adjustment and non-phase adjustment;
and the control module 2 is configured to superimpose and synthesize radiation beams of each antenna unit with a target phase, so as to obtain a target electromagnetic wave in a predetermined direction.
Specifically, the first adjusting module is configured to: determining the target phase of the main radiation beam of each antenna unit according to the position of the object; and according to each target phase, performing phase adjustment on the phase of a main radiation beam in at least one antenna unit in the antenna array so as to enable the phase of the radiation beam of each antenna unit to be the target phase.
In this embodiment, the apparatus further includes a second adjusting module, where the second adjusting module is configured to: when no object is detected to be close to the antenna array, phase adjustment is performed on the phase of the radiation main beam in at least one antenna unit in the antenna array according to a preset phase of the radiation main beam of each antenna unit, so that the phase of the radiation main beam of each antenna unit is a target phase;
or, when it is detected that no object is close to the antenna array, the phase of the main radiation beam of each antenna unit in each antenna array is kept unchanged, so that the current phase of the main radiation beam of each antenna unit is the target phase.
In this embodiment, when the first adjusting module is configured to determine the target phase of the main radiation beam of each antenna unit according to the position of the object, the first adjusting module is further configured to: determining a relative position of the object to the antenna array; determining the beam direction of the target electromagnetic wave to be a direction far away from the object based on the relative position of the object; and determining the target phase of the radiation main beam of each antenna unit according to the direction of the target electromagnetic wave. In this embodiment, when an object is detected to approach the device, the position of the object is determined by using the antenna array as a reference object, and then the direction away from the object is determined as the direction of the target electromagnetic wave, so as to reversely derive the target phase of the main radiation beam of each antenna unit. Therefore, the direction of the finally synthesized electromagnetic wave is the direction departing from the object, the SAR can be reduced, the emission power does not need to be reduced, and therefore the radio frequency performance and the signal quality are guaranteed.
In this embodiment, when performing the phase adjustment, the first adjusting module and the second adjusting module are both configured to:
and performing phase adjustment on the phase of the radiation main beam of the antenna unit by using a phase shifter corresponding to the antenna unit so as to enable the phase of the radiation main beam of the adjusted antenna unit to be a target phase.
In this embodiment, the first adjusting module and the second adjusting module are configured to perform phase adjustment on the phase of the radiation main beam of the antenna unit by using the phase shifter corresponding to the antenna unit, so that when the phase of the radiation main beam of the adjusted antenna unit is the target phase, both the first adjusting module and the second adjusting module are further configured to:
receiving an initial radio frequency current by using a phase shifter corresponding to the antenna unit; according to the target phase of the radiation main beam of the antenna unit, carrying out phase adjustment on the received initial radio frequency current by using a phase shifter corresponding to the antenna unit to obtain a target radio frequency current corresponding to the antenna unit; and outputting the target radio frequency current to the corresponding antenna unit so as to enable the phase of the main radiation beam of the antenna unit to be the target phase of the main radiation beam of the antenna unit.
In a specific implementation process of the embodiment of the invention, the device further comprises a detection module, wherein the detection module is used for detecting whether an object approaches the antenna array by using the sensor so as to obtain a first detection result or a second detection result; wherein the first detection result is: detecting that an object is close to the antenna array; the second detection result is: no object is detected near the antenna array.
Preferably, the electromagnetic wave control apparatus according to the embodiment of the present invention further includes a third adjusting module, where the third adjusting module is configured to: and adjusting the amplitude of the main radiation beam of each antenna unit to enable the amplitude of the main radiation beam of each antenna unit to be a preset value.
Specifically, the third adjusting module is specifically configured to: and adjusting the amplitude of the initial radio frequency current by using a radio frequency chip so as to enable the amplitude of the radio frequency current received by each antenna unit to be a preset value.
According to the embodiment of the invention, the amplitude of the main radiation beam is adjusted by arranging the third adjusting module, so that the amplitude of the main radiation beam is the maximum value, the amplitude of the target electromagnetic wave synthesized by the main radiation beam subsequently can be maximized, and the communication quality of the equipment is further ensured.
In the embodiment of the invention, the phase of the radiation beam of each antenna unit in the antenna array is adjusted, so that the control of the direction of the target electromagnetic wave synthesized by the radiation beam of each antenna unit to be a predetermined method, such as the direction away from an object or the direction deviating from the object, is realized, the control of the SAR is realized, and the standard of the SAR is achieved.
Still another embodiment of the present invention provides an electromagnetic wave control apparatus including a millimeter wave antenna module, as shown in fig. 7. The millimeter wave antenna module includes: the antenna array, the phase shifter, the radio frequency chip and the power management module; wherein, the radio frequency chip includes again: an up/down conversion module and an auxiliary circuit module. When an object is near the antenna array. The intermediate frequency signal is input into the module and modulated and demodulated to a millimeter wave frequency band and an intermediate frequency through an internal radio frequency chip, the phase of the radio frequency signal is controlled by a phase shifter arranged between the radio frequency chip and the antenna array, and the wave beam of the antenna array is shaped by combining amplitude information. When the human body approaches to the antenna array, the maximum radiation value of the antenna is moved to the opposite direction of the head, thereby achieving the standard of SAR.
The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the scope of the present invention is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present invention, and such modifications and equivalents should also be considered as falling within the scope of the present invention.
Claims (8)
1. A method for controlling an electromagnetic wave, comprising:
when an object is detected to be actively close to the antenna array, determining a phase adjustment mode of a radiation beam of each antenna unit in the antenna array so as to enable the phase of the radiation beam of each antenna unit to be a target phase;
the phase adjustment mode comprises phase adjustment and non-phase adjustment;
superposing and synthesizing the radiation beams of the antenna units with the phases as target phases to obtain target electromagnetic waves in a preset direction;
the determining a phase adjustment manner of a radiation beam of each antenna unit in the antenna array so that a phase of the radiation beam of each antenna unit is a target phase includes:
determining a relative position of the object to the antenna array;
determining the beam direction of the target electromagnetic wave to be a direction far away from the object based on the relative position of the object;
determining a target phase of a radiation main beam of each antenna unit according to the direction of the target electromagnetic wave;
and according to each target phase, performing phase adjustment on the phase of the main radiation beam in at least one antenna unit in the antenna array so as to enable the phase of the main radiation beam of each antenna unit to be the target phase.
2. The method of claim 1, wherein the method further comprises:
when no object is detected to be close to the antenna array, phase adjustment is performed on the phase of the radiation main beam in at least one antenna unit in the antenna array according to a preset phase of the radiation main beam of each antenna unit, so that the phase of the radiation main beam of each antenna unit is a target phase;
or, when it is detected that no object is close to the antenna array, the phase of the main radiation beam of each antenna unit in each antenna array is kept unchanged, so that the current phase of the main radiation beam of each antenna unit is the target phase.
3. The method according to any of claims 1-2, wherein the performing phase adjustment specifically comprises:
and performing phase adjustment on the phase of the radiation main beam of the antenna unit by using a phase shifter corresponding to the antenna unit so as to enable the phase of the radiation main beam of the adjusted antenna unit to be a target phase.
4. The method according to claim 3, wherein the phase adjusting the phase of the main radiation beam of the antenna unit by using the phase shifter corresponding to the antenna unit, so that the adjusted phase of the main radiation beam of the antenna unit is the target phase, specifically includes:
receiving an initial radio frequency current by using a phase shifter corresponding to the antenna unit;
according to the target phase of the radiation main beam of the antenna unit, carrying out phase adjustment on the received initial radio frequency current by using a phase shifter corresponding to the antenna unit to obtain a target radio frequency current corresponding to the antenna unit;
and outputting the target radio frequency current to the corresponding antenna unit so as to enable the phase of the main radiation beam of the antenna unit to be the target phase of the main radiation beam of the antenna unit.
5. The method of claim 1, wherein the method further comprises: detecting whether an object approaches the antenna array by using a sensor to obtain a first detection result or a second detection result; wherein the first detection result is: detecting that an object is close to the antenna array; the second detection result is: no object is detected near the antenna array.
6. The method according to claim 1 or 2, wherein prior to said phase adjusting the phase of the main beam of radiation in at least one antenna unit, the method further comprises: and adjusting the amplitude of the main radiation beam of each antenna unit to enable the amplitude of the main radiation beam of each antenna unit to be a preset value.
7. The method of claim 6, wherein the adjusting the amplitude of the main radiation beam of each of the antenna elements comprises: and adjusting the amplitude of the initial radio frequency current by using a radio frequency chip so as to enable the amplitude of the radio frequency current received by each antenna unit to be a preset value.
8. An electromagnetic wave control device, comprising:
the adjusting module is used for determining a phase adjusting mode of a radiation beam of each antenna unit in the antenna array under the condition that an object is detected to actively approach the antenna array, so that the phase of the radiation beam of each antenna unit is a target phase; the phase adjustment mode comprises phase adjustment and non-phase adjustment;
the control module is used for superposing and synthesizing the radiation beams of the antenna units with the phases as target phases to obtain target electromagnetic waves in a preset direction;
the adjustment module is specifically configured to: determining a relative position of the object to the antenna array;
determining the beam direction of the target electromagnetic wave to be a direction far away from the object based on the relative position of the object;
determining a target phase of a radiation main beam of each antenna unit according to the direction of the target electromagnetic wave;
and according to each target phase, performing phase adjustment on the phase of the main radiation beam in at least one antenna unit in the antenna array so as to enable the phase of the main radiation beam of each antenna unit to be the target phase.
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| CN112864622B (en) * | 2019-11-26 | 2022-11-01 | 内蒙古工业大学 | Beam direction control method and device based on arc array antenna |
| CN113382112B (en) * | 2020-02-24 | 2023-04-07 | 北京小米移动软件有限公司 | Method and device for controlling transmission power, computer equipment and storage medium |
| WO2022141046A1 (en) * | 2020-12-29 | 2022-07-07 | 华为技术有限公司 | Antenna apparatus and base station |
| CN114679196A (en) * | 2022-04-07 | 2022-06-28 | Oppo广东移动通信有限公司 | Radio frequency system, control method thereof and electronic equipment |
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