CN115411503B - Antenna devices and electronic equipment - Google Patents
Antenna devices and electronic equipment Download PDFInfo
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- CN115411503B CN115411503B CN202110586740.8A CN202110586740A CN115411503B CN 115411503 B CN115411503 B CN 115411503B CN 202110586740 A CN202110586740 A CN 202110586740A CN 115411503 B CN115411503 B CN 115411503B
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
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Abstract
The application relates to an antenna device and an electronic device. The antenna device comprises a first antenna radiator and a second antenna radiator, wherein one end of the first antenna radiator is provided with a feed point, the feed point is used for being connected with a feed source, one end of the second antenna radiator is connected with the feed point, the other end of the second antenna radiator is grounded, the first antenna radiator is used for sending or/and receiving signals of a first frequency band, and the second antenna radiator is used for sending or/and receiving signals of a second frequency band, so that excitation current input through the feed source is divided by the first antenna radiator and the second antenna radiator through the feed point of the second antenna radiator, the current concentration condition of the antenna device can be balanced to a certain extent, and the current peak value of the whole first antenna radiator is reduced, so that the SAR value of the antenna device meets the specified requirement.
Description
Technical Field
The present disclosure relates to the field of mobile communications technologies, and in particular, to an antenna device and an electronic device.
Background
With the development and progress of technology, communication technology has been rapidly developed and advanced, and with the improvement of communication technology, the popularization of intelligent electronic products has been improved to an unprecedented level, and more intelligent terminals or electronic devices become an indispensable part of people's life, such as smart phones, smart bracelets, smart watches, smart televisions, computers, etc. Currently, a communication antenna is generally arranged in an electronic device to meet the communication requirement of a user. As the demands of people on communication efficiency and types are higher, the power of the antenna in the current electronic device is also higher, so that the radiation effect of the antenna on a human body is also higher, which will have adverse effects on the human body.
Disclosure of Invention
The embodiment of the application provides an antenna device and electronic equipment.
In a first aspect, embodiments of the present application provide an antenna apparatus that includes a first antenna radiator and a second antenna radiator. One end of the first antenna radiator is provided with a feed point, and the feed point is used for connecting a feed source. One end of the second antenna radiator is connected with the feed point, and the other end of the second antenna radiator is grounded. The first antenna radiator is used for transmitting or/and receiving signals of a first frequency band, and the second antenna radiator is used for transmitting or/and receiving signals of a second frequency band. Wherein the second frequency band is the same as the first frequency band; alternatively, the second frequency band is a sub-band of the first frequency band.
In a second aspect, an embodiment of the present application further provides an electronic device, including a feed source and the antenna apparatus described above, where the feed source is electrically connected to the feed point.
In the antenna device and the electronic equipment provided by the embodiments of the present invention, the antenna device includes a first antenna radiator and a second antenna radiator, one end of the first antenna radiator is provided with a feed point, the feed point is used for connecting a feed source, one end of the second antenna radiator is connected with the feed point, the other end of the second antenna radiator is grounded, the first antenna radiator is used for transmitting or/and receiving signals in a first frequency band, and the second antenna radiator is used for transmitting or/and receiving signals in a second frequency band, therefore, through connecting the second antenna radiator to the feed point of the first antenna radiator, excitation current input through the feed source is split by the first antenna radiator and the second antenna radiator, current concentration conditions of the antenna device can be balanced to a certain extent, thereby reducing current peaks of the whole first antenna radiator, and a single point of current does not basically exist on the radiator of the antenna device, but is split into at least two current strong points (the peak of the current strong points split on the first antenna radiator and the second antenna radiator is smaller than the peak of the current strong point of the first antenna radiator), so that the single point of current strong point is split to be weaker than the peak of the current strong peak of the first antenna radiator, and the first SAR is further formed by the first antenna radiator, and the SAR is more than the first SAR has a requirement of the first antenna and is formed.
Drawings
In order to more clearly illustrate the technical solutions of the application, the drawings that are required to be used in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the application and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of an antenna device according to an embodiment of the present application.
Fig. 2 is a schematic diagram of another antenna device according to an embodiment of the present application.
Fig. 3 is a schematic diagram of yet another antenna device according to an embodiment of the present application.
Fig. 4 is a schematic diagram of an operating frequency band of the first antenna radiator according to an embodiment of the present application.
Fig. 5 is a schematic diagram of a filtering circuit according to an embodiment of the present application.
Fig. 6 is a schematic diagram of radiation efficiency of the antenna device shown in fig. 3.
Fig. 7 is a schematic diagram of a simulation of a near field electric field distribution of the antenna apparatus shown in fig. 3.
Fig. 8 is a schematic diagram of still another structure of the antenna device provided in the embodiment of the present application.
Fig. 9 is a schematic diagram of still another structure of the antenna device provided in the embodiment of the present application.
Fig. 10 is a schematic diagram of still another structure of the antenna device provided in the embodiment of the present application.
Fig. 11 is a schematic view of still another structure of the antenna device provided in the embodiment of the present application.
Fig. 12 is a schematic diagram of an electronic device provided in an embodiment of the present application.
Fig. 13 is a schematic view of the internal structure of the electronic device shown in fig. 12.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
As used in embodiments of the present application, an "electronic device" includes, but is not limited to, a device configured to receive/transmit communication signals via a wireline connection (e.g., via a public-switched telephone network (PSTN), a Digital Subscriber Line (DSL), a digital cable, a direct cable connection, and/or another data connection/network) and/or via a wireless interface (e.g., for a cellular network, a Wireless Local Area Network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter, and/or another communication terminal). A communication terminal configured to communicate via a wireless interface may be referred to as a "wireless communication terminal," wireless terminal, "" electronic device, "and/or" electronic apparatus. Examples of electronic devices include, but are not limited to, satellites or cellular telephones; a Personal Communications System (PCS) terminal that may combine a cellular radiotelephone with data processing, facsimile and data communications capabilities; a PDA that can include a radiotelephone, pager, internet/intranet access, web browser, organizer, calendar, and/or a Global Positioning System (GPS) receiver; and conventional laptop and/or palmtop receivers, gaming machines, or other electronic devices that include radiotelephone transceivers.
Electromagnetic wave energy absorption ratio (SAR, specific Absorption Rate) is commonly referred to as an absorption ratio or absorption ratio, and refers to an electronic device electromagnetic wave energy absorption ratio. The specific meaning is as follows: under the action of external electromagnetic field, an induced electromagnetic field is generated in human body, and because each organ of human body is a consumable medium, the electromagnetic field in human body generates an induced current, so that the human body can absorb and dissipate electromagnetic energy, and SAR is commonly used in biological dosimetry to characterize the physical process. SAR is the electromagnetic power absorbed or consumed by human tissue per unit mass, and is expressed in W/kg, or mw/g. The expression formula is: sar=σ|ei| 2 2 ρ, wherein:
ei is the effective value of the electric field intensity in the cell tissue and is expressed as V/m;
sigma is the conductivity of human tissue, expressed as S/m;
ρ is the density of human tissue in kg/m 3 And (3) representing.
SAR in human tissue is proportional to the square of the electric field strength in that tissue and is determined by the parameters of the incident electromagnetic field (e.g., frequency, strength, direction, and source of the electromagnetic field), the relative position of the target, the genetic characteristics of typical tissues of the exposed human body, ground effects, and exposed environmental effects. Safety standards for human exposure to electromagnetic waves, such as the international standard, european standard of less than 2.0w/kg per 10 g and U.S. standard of less than 1.6mw/g per g, have been established in many countries and regions.
The methods for reducing SAR values commonly used at present mainly comprise the following steps: (1) The transmitting power of the antenna is directly reduced to reduce the absorption of electromagnetic waves by a human body, but the requirement of total radiating power (total radiated power, TRP) is hardly ensured by reducing the transmitting power of the antenna, the TRP is too low, the communication quality is also low, and the increasingly improved communication requirement on the market cannot be met generally; (2) The position of the antenna in the electronic equipment is arranged in the direction away from the head of the user so as to reduce the absorption of electromagnetic waves by the human body, but the current development trend of the electronic equipment is that the thickness is thinner and thinner, so that the space of the antenna is smaller and smaller, and the distance between the antenna and the head of the user is difficult to ensure; (3) The wave absorbing material is attached near the antenna to reduce the absorption of electromagnetic waves by human body, but because the space near the antenna is very small due to the structural design of the electronic equipment, the wave absorbing material is difficult to attach, and the cost of the wave absorbing material is higher. It can be seen that, up to now, there is still no better solution that can effectively reduce the SAR of the antenna.
Therefore, in view of the above problems, the inventors of the present application have found through a great number of repeated researches that the SAR hot spot of the antenna of the current electronic device is basically concentrated in a region with a stronger current distribution on the radiator, that is, a region with a higher current density on the radiator, and the corresponding generated SAR value is larger. In view of this, the inventors propose an antenna device of the present application and an electronic apparatus having the antenna device. The antenna device comprises a first antenna radiator and a second antenna radiator, wherein one end of the first antenna radiator is provided with a feed point, the feed point is used for being connected with a feed source, one end of the second antenna radiator is connected with the feed point, the other end of the second antenna radiator is grounded, the first antenna radiator is used for sending or/and receiving signals of a first frequency band, and the second antenna radiator is used for sending or/and receiving signals of a second frequency band, so that excitation current input through the feed source is divided by the first antenna radiator and the second antenna radiator through the feed point of the second antenna radiator, the current concentration condition of the antenna device can be balanced to a certain extent, and accordingly the current peak value of the whole first antenna radiator is reduced, and the SAR value of the whole antenna device is effectively reduced. Therefore, the antenna device provided by the embodiment of the application can ensure that the antenna device has a lower SAR value.
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.
Referring to fig. 1, an antenna device 100 according to an embodiment of the present application includes a first antenna radiator 110 and a second antenna radiator 120. The first antenna radiator 110 and the second antenna radiator 120 are used to transmit or/and receive signals. The first and second antenna radiators 110 and 120 are connected to a feed 30, respectively, and the feed 30 is used to feed excitation current to the first and second antenna radiators 110 and 120 so that the first and second antenna radiators 110 and 120 can resonate to transmit signals.
In an embodiment of the present application, one end of the first antenna radiator 110 is provided with a feeding point 111, the feeding point 111 being used to connect to the feed 30, so that the first antenna radiator 110 can transmit a signal when the feed 30 feeds an excitation current. One end of the second antenna radiator 120 is grounded. In the present specification, it should be understood that when one component is considered to be "connected" to another component, it may be directly connected to the other component or intervening components may also be present, that is, there may be an indirect connection between the two components. For example, in the present embodiment, the structure in which the feeding point 111 is connected to the feed 30 may be: the feed point 111 is directly connected to the feed 30 by a conductor; alternatively, other elements may exist between the feeding point 111 and the feed 30, for example, the feeding point 111 may be indirectly connected to the feed 30 through a capacitor to implement coupling feeding, and for example, the feeding point 111 may also be indirectly connected to the feed 30 through a matching circuit. In some embodiments, as shown in fig. 1, the other end of the first antenna radiator 110 may be an open end. In other embodiments, as shown in fig. 2, the other end of the first antenna radiator 110 is grounded.
In the embodiment of the present application, the first antenna radiator 110 is configured to transmit or/and receive signals in the first frequency band, that is, the first antenna radiator 110 may be configured to transmit or/and receive signals in the first frequency band.
In embodiments of the present application, the first antenna radiator 110 may be configured to transmit or/and receive signals of at least one operating frequency band, which may be, for example, long term evolution (Long Term Evolution, LTE) signals. The operating frequency band of the signal may be at least one frequency band of LTE, such as B3 frequency band (1.71 GHz-1.88 GHz), B32 frequency band (1.45 GHz-1.5 GHz), and so on. The signal may also be a New Radio (NR) signal, etc. The operating frequency band of the signal may also be at least one frequency band of NR, such as the N1 frequency band (1.92 GHz-2.17 GHz), the N2 frequency band (1.85 GHz-1.99 GHz), and so on. In an embodiment of the present application, the first frequency band may cover at least one operating frequency band. For example, the frequency range of the first frequency band may cover only the frequency range of a single operating frequency band, e.g., the frequency range of the first frequency band covers only the frequency range of the B3/N3 frequency band, and the first antenna radiator 110 may transmit or/and receive signals of the B3/N3 frequency band. For another example, the frequency range of the first frequency band may cover the frequency ranges of a plurality of working frequency bands, e.g., the frequency range of the first frequency band covers the frequency ranges of the B3/N3 frequency band and the B5/N5 frequency band, and the first antenna radiator 110 may transmit or/and receive signals of the B3/N3 frequency band or the B5/N5 frequency band.
In the embodiment of the present application, one end of the second antenna radiator 120 is connected to the feeding point 111, and the other end of the second antenna radiator 120 is grounded. It should be appreciated that one end of the second antenna radiator 120 may be directly physically connected to the feeding point 111, and that one end of the second antenna radiator 120 may also be connected between the feeding point 111 and the output end of the feed, so that the excitation current output via the feed can be split by the first antenna radiator 110 and the second antenna radiator 120. The second antenna radiator 120 is configured to transmit or/and receive signals in a second frequency band, i.e. the second antenna radiator 120 may be configured to transmit or/and receive signals in a second frequency band, it should be understood that the second frequency band may cover at least one operating frequency band.
In some embodiments, the second frequency band may be substantially the same as the first frequency band, i.e., the operating frequency band in which the first antenna radiator 110 and the second antenna radiator 120 may be used to transmit and/or receive signals, when the excitation current from the feed 30 is split by the first antenna radiator 110 and the second antenna radiator 120. It should be appreciated that at this point, the number of operating frequency bands for the signals supportable by the first and second antenna radiators 110 and 120 may be one or more. For example, the second frequency band is the same as the first frequency band, and both frequency bands can be 2000 MHz-2700 MHz, and the frequency band range covers the frequency band range of the B41/N41 frequency band (2496 MHz-2690 MHz), so that the first antenna radiator 110 and the second antenna radiator 120 can both support signals with the operating frequency band of B41/N41 frequency band. For another example, the second frequency band and the first frequency band are both 1 GHz-2 GHz, and the frequency band ranges cover the frequency band ranges of the B3/N3 and B32/N32 frequency bands, so that the first antenna radiator 110 and the second antenna radiator 120 can support signals with the working frequency bands of B3/N3 and B32/N32.
In some embodiments, the second frequency band may be a sub-band of the first frequency band, i.e. the first frequency band covers the second frequency band. At this time, the number of operating frequency bands of the signal supportable by the first antenna radiator 110 is greater than that of the signal supportable by the second antenna radiator 120. The number of operating frequency bands of the signal supportable by the second antenna radiator 120 may be one or more, and the operating frequency band of the signal supportable by the first antenna radiator 110 includes the operating frequency band of the signal supportable by the second antenna radiator 120. For example, the second frequency band is 1.4GHz to 1.6GHz, which covers the frequency range of the B32 band. The first frequency band is 1 GHz-2 GHz, and the frequency range of the frequency bands of B3 and B32 is covered, and the frequency range of the second frequency band is covered.
In the antenna device 100, the first antenna radiator 110 and the second antenna radiator 120 are provided, the feeding point 111 is provided at one end of the first antenna radiator 110, the feeding point 111 is connected to one end of the second antenna radiator 120, the exciting current is split by the first antenna radiator 110 and the second antenna radiator 120, the current concentration condition of the antenna device 100 can be balanced to a certain extent, and thus the current peak value of the whole first antenna radiator 110 is reduced, so that the radiator of the antenna device 100 basically does not have extremely strong current single points, but is split into at least two strong current points (the peak value of the at least two strong current points split by the first antenna radiator 110 and the second antenna radiator 120 is necessarily smaller than the peak value of the extremely strong current single point), and the original SAR single hot point is approximately dispersed to the first antenna radiator 110 and the second antenna radiator 120, so that the weak SAR multiple hot point is formed, and the SAR value of the antenna device 100 meets the requirement. Alternatively, even if a single current strong point exists in the radiator of the antenna device 100, since the excitation current is split by the first antenna radiator 110 and the second antenna radiator 120, the current concentration state of the antenna device 100 can be balanced to some extent, the peak value of the single current strong point is relatively low, the predetermined requirement is satisfied, and the SAR value of the antenna device 100 is further made to satisfy the predetermined requirement.
In the embodiment of the present application, the first antenna radiator 110 may be substantially in a strip shape, for example, the first antenna radiator 110 may be a metal strip, and the feeding point 111 is disposed at one end of the first antenna radiator 110. The second antenna radiator 120 may also be substantially strip-shaped, for example, the first antenna radiator 110 may be a metal strip, an elongated printed radiator, or the like. The extending direction of the second antenna radiator 120 coincides with the extending direction of the first antenna radiator 110, for example, the second antenna radiator 120 may be disposed at a parallel interval with the first antenna radiator 110, or the second antenna radiator 120 may be substantially parallel to the first antenna radiator 110, or the length direction of the second antenna radiator 120 may be substantially the same as the length direction of the first antenna radiator 110. In some embodiments, the first antenna radiator 110 and the second antenna radiator 120 may also have shapes other than straight, for example, the first antenna radiator 110 may be in a bent sheet shape, a sheet shape with branches, or the like, and the extending direction of the first antenna radiator 110 is understood to be the extending direction of the whole body thereof, such as the direction characterized by the length dimension; the second antenna radiator 120 may be a bent sheet, a sheet with branches, etc., and the extending direction of the second antenna radiator 120 should be understood as the extending direction of the whole thereof, such as the direction characterized by the length dimension, in which case the extending directions of the whole of the first antenna radiator 110 and the second antenna radiator 120 coincide.
In some embodiments, the antenna device 100 may operate in multiple operating frequency bands. When the antenna device 100 operates in different operating frequency bands, the SAR values generated correspondingly may be different. For example, when the antenna device 100 operates in a part of the plurality of operating frequency bands, the peak value of the SAR hot spot generated by the antenna device 100 is large, and the influence on the human body is large. When the antenna device 100 operates in other operating frequency bands among the plurality of operating frequency bands, the SAR value generated by the antenna device 100 is smaller, and the influence on the human body is smaller. In order to reduce the influence of the SAR hot spot peak generated during the operation of the antenna device 100 on the human body, referring to fig. 3, the antenna device 100 may further include a filter circuit 130, one end of the filter circuit 130 is connected to the feeding point 111, and the other end of the filter circuit 130 is connected to the second antenna radiator 120. The filter circuit 130 is configured to allow an excitation current corresponding to a signal in a specific frequency band (e.g., a signal belonging to a sub-band portion of the second frequency band in the first frequency band) that needs to reduce the SAR value to pass through the second antenna radiator 120, so that when the antenna device 100 operates in the specific frequency band, the second antenna radiator 120 and the first antenna radiator 110 can shunt the excitation current, and can balance the current concentration condition of the antenna device 100 to a certain extent, thereby reducing the current peak value of the entire first antenna radiator, and thus, the SAR value generated when the antenna device 100 operates in the specific frequency band meets the specified requirement. For a portion of the signals in the first frequency band that does not belong to the specific frequency band (e.g., a portion of the signals in the first frequency band that does not belong to the second frequency band), the SAR value generated by the portion of the signals corresponding to the portion of the signals may be considered to satisfy the specified requirement, and the SAR reduction processing is not required for the signals in the frequency band, when the signals in the frequency band need to be radiated, the filter circuit 130 may be in a high-impedance state (e.g., the excitation current corresponding to the signals in the frequency band may be reduced or even blocked from passing through the second antenna radiator 120), so that the signals in the frequency band may be radiated by the first antenna radiator 110, and normal operation of the antenna device 100 in other frequency bands may not be substantially affected, so that the antenna device 100 may be guaranteed to have better performance. It should be understood that the above-mentioned "specific frequency band" is a target frequency band set by the antenna device 100 to reduce SAR, where the specific frequency band may be the same as the second frequency band, or may be a sub-frequency band in the first frequency band, and the sub-frequency band is a sub-frequency band with relatively higher SAR value corresponding to all sub-frequency bands in the first frequency band; of course, the specific frequency band can be set according to the requirement. The number of sub-bands is also not necessarily limited, as it may be one or more.
For example, referring to fig. 4, the first frequency Band supported by the first antenna radiator 110 may include a first operating frequency Band1 and a second operating frequency Band2, that is, the first antenna radiator 110 may operate in the first operating frequency Band1 and the second operating frequency Band2. When the first antenna radiator 110 operates in the first operating Band1, the Band in which SAR needs to be reduced may be the first operating Band1. The filter circuit 130 needs to reduce the SAR value generated when the first antenna radiator 110 operates in the first operating Band1, and also needs to ensure that the first antenna radiator 110 operates normally in the second operating Band2. Therefore, the filter circuit 130 is configured to be in a conductive state when the first antenna radiator 110 is operated in the first operation Band1 and to be in a blocking state when the second operation Band2 is operated, so that the shunt effect of the second antenna radiator 120 can be utilized, so that for the first operation Band1, since the filter circuit 130 is configured to be in a conductive state, the first antenna radiator 110 and the second antenna radiator 120 radiate together through current shunt; for the second operating Band2, since the filter circuit 130 is configured in the high-impedance state/blocking state, the second antenna radiator 120 is split less or even equivalent to being disconnected from the feed source 30, and the second operating Band2 is mainly radiated or separately radiated by the first antenna radiator 110, so that the SAR value of the first operating Band of the antenna device 100 meets the requirement, and the normal radiation performance of the second operating Band is not affected.
In some embodiments, the second frequency Band supported by the second antenna radiator 120 may be the first operating frequency Band1, where the second frequency Band is a sub-frequency Band of the first frequency Band, so the specific frequency Band of the antenna apparatus 100 that needs to reduce the SAR value may be the second frequency Band. The filter circuit 130 is configured to allow excitation current corresponding to the signal of the second frequency band to pass, the excitation current from the feed 30 being split by the first antenna radiator 110 and the second antenna radiator 120. For example, when the first antenna radiator 110 is used to transmit or/and receive signals in the second frequency band, the excitation current from the feed 30 is split by the first antenna radiator 110 and the second antenna radiator 120.
In some embodiments, the filter circuit 130 may only allow the excitation current corresponding to the signal of a single operating band to pass. In other embodiments, when the antenna device 100 needs to reduce SAR values in multiple frequency bands, the filter circuit 130 may also be configured to allow excitation currents corresponding to signals in multiple operating frequency bands to pass. For example, when the second frequency band is a sub-band of the first frequency band, the filter circuit 130 is configured to allow an excitation current corresponding to a signal of the second frequency band to pass, such that the excitation current from the feed 30 is split by the first antenna radiator 110 and the second antenna radiator 120; as another example, when the second frequency band is a sub-band of the first frequency band, the filter circuit 130 is further configured to block a target excitation current from passing to the second antenna radiator 120, where the target excitation current corresponds to a signal that does not belong to the second frequency band among the signals of the first frequency band, and the "filter circuit 130 blocks the target excitation current" is understood that when the feed 30 outputs the target excitation current, the filter circuit 130 is in a high-impedance state to reduce or even completely block the target excitation current flowing to the second antenna radiator 120, and the target excitation current flows to the first antenna radiator 110, so that the first antenna radiator 110 radiates a signal that does not belong to the second frequency band among the signals of the first frequency band.
In some implementations, the filter circuit 130 may be a band reject filter. Referring to fig. 5, in some embodiments, the filter circuit 130 may include a first capacitor 131 and a first inductor 132. The first capacitor 131 and the first inductor 132 are connected in parallel, and the first capacitor 131 and the first inductor 132 connected in parallel are connected in series between the second antenna radiator 120 and the feeding point 111. It is understood that the capacitance value of the first capacitor 131 and the inductance value of the first inductor 132 may be determined according to the operating frequency band in which the SAR value needs to be reduced, for example, the first frequency band of the antenna apparatus 100 covers the B32 frequency band (1.45 GHz-1.5 GHz) and the B3 frequency band (1.71 GHz-1.88 GHz), the second frequency band of the antenna apparatus 100 covers the B3 frequency band (1.71 GHz-1.88 GHz), that is, the B3 frequency band is a frequency band in which the SAR value needs to be reduced, the filter circuit 130 is configured to allow the excitation current corresponding to the signal of the B3 frequency band to pass, and the filter circuit 130 is configured to prevent the excitation current corresponding to the signal of the B32 frequency band from passing. As an embodiment, the capacitance value of the first capacitor 131 may be 2.2pF (picofarad), and the inductance value of the first inductor 132 may be 5.1nH (nanohenry). It is to be understood that the structure of the filter circuit 130 is not limited thereto, and other embodiments of the filter circuit 130 may be adopted, so long as the filter circuit may be used to allow the excitation current corresponding to the signal of the operating frequency band requiring SAR reduction to pass, and prevent the excitation current corresponding to the signal of the other operating frequency band from passing, which is not limited thereto.
In some embodiments, the filter circuit 130 may include a plurality of band-stop filters, one ends of which are connected to one ends of the second antenna radiator 120, and a switch disposed between the other ends of the plurality of band-stop filters and the feeding point 111, through which the plurality of band-stop filters are connected to the feeding point 111. By adjusting the capacitance and inductance of the band-stop filter, a plurality of band-stop filters capable of passing excitation current corresponding to signals of different frequency bands are arranged, and one band-stop filter is selectively connected into a circuit, so that the second antenna radiator 120 can shunt the excitation current in different working frequency bands, and the excitation current is shunted in a plurality of working frequency bands needing SAR value reduction, thereby effectively reducing the SAR value. It will be appreciated that other structures for splitting the excitation current of the second antenna radiator 120 at multiple operating frequency bands may be used in the embodiments of the present application, which are not limited in this application.
Referring specifically to fig. 6, fig. 6 shows a schematic diagram of the radiation efficiency of a conventional antenna and the antenna device 100 provided in some embodiments of the present application, and it can be seen from the drawing that the antenna efficiency of the antenna device 100 provided in the embodiments of the present application does not change greatly compared with the antenna with the conventional radiator. Therefore, in the antenna device 100, by providing the first antenna radiator 110, the second antenna radiator 120 and the filter circuit 130, when the frequency band of the SAR value needs to be reduced, the filter circuit 130 allows the excitation current to pass, the first antenna radiator 110 and the second antenna radiator 120 shunt the excitation current, so as to improve the electric field distribution condition of the antenna device 100, and the maximum radiation intensity of the electric field of the frequency band of the SAR value needs to be reduced is relatively low, and the average value of the overall radiation is not reduced, so that the antenna device 100 still has high radiation efficiency.
With continued reference to fig. 7, fig. 7 is a schematic diagram illustrating a simulation of a near field electric field distribution of a conventional antenna and an antenna apparatus 100 provided in some embodiments of the present application, which illustrates an electric field intensity radiated when a resonant frequency of the antenna apparatus 100 is in a B3 band (1.71 GHz) and a corresponding SAR peak, wherein the filter circuit 130 is configured to pass an excitation current corresponding to a signal in the B3 band. As shown in fig. 7 (a), in the structure of the conventional radiator, it is not provided with a plurality of antenna radiators, which correspond to SAR peaks of 2.11796W/kg; in the structure of the antenna device provided in the present application, the diagram (b) of fig. 7 shows that the antenna device at least includes the first antenna radiator 110, the second antenna radiator 120 and the filter circuit 130, and the peak value of the SAR is 1.60775W/kg, which is reduced by 24% compared with the peak value of the normal antenna structure of the radiator.
Referring to fig. 8, in some embodiments, the antenna apparatus 100 may further include a matching circuit 140 connected to the second antenna radiator 120, wherein the second antenna radiator 120 is grounded through the matching circuit 140. The matching circuit 140 may be configured to adjust the ratio of the excitation current flowing through the first antenna radiator 110 to the excitation current flowing through the second antenna radiator 120 when the first antenna radiator 110 and the second antenna radiator 120 shunt the excitation current, so as to adjust the signal emission power of the first antenna radiator 110 based on the excitation current flowing therethrough and the signal emission power of the second antenna radiator 120 based on the excitation current flowing therethrough according to actual usage requirements.
In some embodiments, the matching circuit 140 is a capacitor. By setting the capacitance value, the ratio of the excitation current flowing through the first antenna radiator 110 to the excitation current flowing through the second antenna radiator 120 can be adjusted. For example, the larger the capacitance value, the smaller the ratio of the excitation current flowing through the first antenna radiator 110 to the excitation current flowing through the second antenna radiator 120, i.e., the smaller the excitation current flowing through the first antenna radiator 110, the larger the excitation current flowing through the second radiator.
In some embodiments, the second antenna radiator 120 and the external detector may form an equivalent capacitor, and the second antenna radiator 120 may generate a capacitance signal when a capacitance is formed between the second antenna radiator 120 and the external detector, where the external detector may include an electrical conductor (e.g., metal, human body, etc.) capable of exciting the capacitance signal to generate a signal. In this embodiment, the second antenna radiator 120 is configured to sense a distance between a target object, such as a human body, for example, a head, a body, a hand, etc., and the second antenna radiator 120 to generate a capacitance signal. When the target object is close to the second antenna radiator 120, the second antenna radiator 120 may induce a capacitive signal. For example, when the user's head is close to the mobile phone for receiving a call, the user's head is close to the second antenna radiator 120, the user's head and the second antenna radiator 120 may be equivalent to two plates of a capacitor, and the user's head and the second antenna radiator 120 form a capacitor. As can be seen from the formula c=εs/4pi kd (where ε is the dielectric constant, S is the plate area, d is the distance between the plates, and k is the electrostatic force constant), when the user approaches the mobile phone, i.e. approaches the second antenna radiator 120, the distance between the user and the second antenna radiator 120 becomes smaller, i.e. d decreases, and the capacitance C increases. Therefore, by acquiring the capacitance signal generated by the second antenna radiator 120, it is possible to detect whether the target object is close. When the capacitance value C increases, i.e. characterizes that the target object is approaching the antenna arrangement 100, the antenna arrangement 100 may decrease its transmit power depending on the situation of increasing distance, in order to decrease the influence of the radiation on the target object. Further, when the capacitance value C decreases, i.e. it is indicated that the target object is moving away from the antenna device 100, the antenna device 100 may increase its transmission power according to the situation that the distance decreases, so as to ensure the radiation efficiency of the antenna device 100.
In some embodiments, in order to further reduce the SAR peak of the antenna device 100, referring to fig. 9, the antenna device 100 may further include a sensor 150. One end of the sensor 150 is connected to a connection node between the matching circuit 140 and the second antenna radiator 120, and the sensor 150 determines whether the target object is approaching by receiving the capacitance signal of the second antenna radiator 120 by using the characteristic that the second antenna radiator 120 can form an equivalent capacitance with the target object to generate a capacitance signal. It should be understood that the term "connection node" in this specification is understood to mean a connection relationship where two elements are electrically connected, where the connection relationship may be a physical junction point or a set of points that are the same on a circuit (e.g., two elements are connected by a length of wire, where the electrical potentials of the points on the wire are approximately the same, then the connection node of the two elements may also be understood to be any point or points on the wire or wires).
In some embodiments, the sensor 150 is configured to convert the capacitance signal to a detection signal and transmit the detection signal to the controller. In order to flexibly set the position of the sensor 150, further, the antenna device 100 may further include a transmission line connected between the second antenna radiator 120 and the sensor 150, and the distance between the sensor 150 and the second antenna radiator 120 may be adjusted through the transmission line.
In an embodiment of the present application, the feed 30 feeds excitation current to the first and second antenna radiators 110, 120 to enable the first and second antenna radiators 110, 120 to resonate to transmit signals. The output power of the feed source 30 is controlled, so that the feed source 30 can feed exciting currents with different output powers, and the first antenna radiator 110 and the second antenna radiator 120 can generate resonance to send signals with different powers, namely, the transmitting powers of the first antenna radiator 110 and the second antenna radiator 120 can be controlled by controlling the output power of the feed source 30.
Further, the antenna device 100 may further include a controller 180, where the controller 180 is connected to the sensor 150, and is configured to control the transmission power of the first antenna radiator 110 and/or the second antenna radiator 120 according to the detection signal of the sensor 150. In some embodiments, the controller 180 may be electrically connected to the feed 30, and the controller 180 may be used to control the output power of the feed 30. Further, the controller 180 may be further configured to control the output power of the feed 30 according to the capacitance signal of the second antenna radiator 120, thereby controlling the transmission power of the first antenna radiator 110 and the second antenna radiator 120. In some embodiments, the controller 180 is configured to: when the capacitance signal received by the sensor 150 increases, the output power of the feed 30 is reduced, thereby reducing the transmit power of the first antenna radiator 110 or/and the second antenna radiator 120.
In some embodiments, there may be a predetermined functional relationship between the capacitance signal and the transmit power, and when the capacitance signal received by the sensor 150 increases, the controller 180 may be configured to decrease the transmit power of the first antenna radiator 110 or/and the second antenna radiator 120 based on the functional relationship; when the capacitance signal received by the sensor 150 decreases, the controller 180 may be configured to increase the transmit power of the first antenna radiator 110 or/and the second antenna radiator 120 based on the functional relationship. In other embodiments, a preset threshold may be set for the capacitance signal, and the controller 180 is configured to: when the capacitance signal received by the sensor 150 is greater than a preset threshold, the output power of the feed source 30 is reduced to a specified value, thereby reducing the transmission power of the first antenna radiator 110 or/and the second antenna radiator 120. The preset threshold value of the capacitance signal can represent a preset value of a distance between an external detection body (such as a user' S head) and the antenna device 100, where the preset value of the distance may be less than or equal to 30cm,20cm, or 10cm (e.g., the preset value of the distance may be any value of 0-50 cm), and the preset threshold value of the capacitance signal may be set by the above formula c=εs/4pi kd and the preset value of the distance. Therefore, the antenna device 100 may transmit the capacitance signal to the sensor 150 by multiplexing the second antenna radiator 120 as a detection terminal of the sensor 150, and further allow the controller 1901 to control the emission power of the first antenna radiator 110 and/or the second antenna radiator 120 according to the capacitance signal, so that the influence of the radiation of the antenna device 100 on the user can be reduced when the distance between the user and the antenna device 100 is small.
Further, when the capacitance signal received by the sensor 150 is less than or equal to the preset threshold, the controller 180 may increase the output power of the feed 30, thereby increasing the transmission power of the first antenna radiator 110 and the second antenna radiator 120. When the capacitance signal is smaller than the preset threshold, the output power of the feed source 30 is restored to the normal working power, and at this time, the distance between the target object and the second antenna radiator 120 exceeds the preset value, and the SAR value suffered by the target object is smaller at this distance, so that the output power of the feed source 30 is not controlled any more, and the first antenna radiator 110 and the second antenna radiator 120 restore to the emission power in normal working. The preset threshold value of the capacitance signal and the preset value of the distance between the target object and the second antenna radiator 120 may be set according to actual needs, which is not limited in this application.
Referring to fig. 10, in some embodiments, since one end of the second antenna radiator 120 is connected to the feed 30 and the other end of the second antenna radiator 120 is grounded, in order to avoid the ground feed 30 and the ground system from adversely affecting the detection accuracy of the sensor 150, so as to accurately obtain a capacitance signal between the second antenna radiator 120 and the target object, the antenna device 100 may be connected in series with a capacitor 40 on a path from the second antenna radiator 120 to the feed 30, and the capacitor 40 may be used to isolate direct current flowing from the feed 30. It should be noted that, the "path from the second antenna radiator 120 to the feed 30" is understood to be a path through which an excitation current flows when the second antenna radiator 120 radiates a signal in the second frequency band, for example, in some embodiments, one end of the second antenna radiator 120 is directly and physically connected to the feed point 111, and the "path from the second antenna radiator 120 to the feed 30" is understood to be a "path output from the feed 30, through the feed point 111 to the second antenna radiator 120", and in this case, the capacitor 40 may be connected in series between the feed point 111 and the second antenna radiator 120, for example, between the filter circuit 130 and the feed point 111, or between the second antenna radiator 120 and the filter circuit 130; as yet another example, in other embodiments, where one end of the second antenna radiator 120 is connected between the feed point 111 and the output end of the feed 30, then "the path from the second antenna radiator 120 to the feed 30" is understood as "the path from the feed 30 to the second antenna radiator 120 (which may not have to pass through the feed point 111)", where the capacitor 40 may be connected in series between the second antenna radiator 120 and the output end of the feed 30, such as between the filter circuit 130 and the output end of the feed 30, or between the second antenna radiator 120 and the filter circuit 130. Optionally, when the filter circuit 130 disposed between the second antenna radiator 120 and the feeding point 111 includes a capacitor, the capacitor 40 may also multiplex the capacitor of the filter circuit 130 to isolate the dc current from the feed source.
In some embodiments, the antenna device 100 may further have a capacitor 50 connected in series on a path from the second antenna radiator 120 to the ground, so as to isolate the dc current flowing from the ground, thereby isolating the interference of the dc current of the feed 30 and the ground on the capacitance value generated by the second antenna radiator 120. Further, the capacitor 50 may be connected in series between the connection node of the sensor 150 and the second antenna radiator 120 to ground, i.e. the second antenna radiator 120 may be grounded through the capacitor 50, while the sensor 150 is connected between the capacitor 50 and the second antenna radiator 120. Optionally, when the matching circuit 140 disposed between the second antenna radiator 120 and the ground includes a capacitor, the capacitor 50 may also multiplex the capacitor of the matching circuit 140 to isolate the dc current from the ground system.
In some embodiments, to reduce the effect of the sensor 150 on the first antenna radiator 110 and the second antenna radiator 120, the antenna device 100 may further include a second inductance 190. Wherein a second inductance 190 is connected in series between the sensor 150 and the second antenna radiator 120. The second inductor 190 may isolate the sensor 150 from the second antenna radiator 120, thereby reducing the influence of the sensor 150 on the first antenna radiator 110 and the second antenna radiator 120, and the value of the second inductor 190 may be set according to actual use requirements, for example, the value of the second inductor may be 100nH.
In some embodiments, the first antenna radiator 110 is one of a flexible circuit board antenna radiator, a laser direct structuring antenna radiator, a printed direct structuring antenna radiator, or a metal stub. In some embodiments, the second antenna radiator 120 is one of a flexible circuit board antenna radiator, a laser direct structuring antenna radiator, a printed direct structuring antenna radiator, or a metal stub.
Referring to fig. 11, in some embodiments, the antenna device 100 may further include a first connector 160. The first connection 160 is disposed between the second antenna radiator 120 and the first antenna radiator 110, and is configured to enable detachable connection between the second antenna radiator 120 and the first antenna radiator 110. In some embodiments, the antenna device 100 may further include a second connector 170. The second connector 170 is disposed at an end of the second antenna radiator 120 remote from the first antenna radiator 110, and is used for detachably connecting the second antenna radiator 120 to the ground. Alternatively, the first and second connectors 160 and 170 may be spring contact connectors such as spring pins, spring clips, or the like.
In the antenna device and the electronic equipment provided by the embodiment of the application, the antenna device comprises the first antenna radiator and the second antenna radiator, the feeding point is arranged at one end of the first antenna radiator and is used for being connected with the feed source, one end of the second antenna radiator is connected with the feeding point, the other end of the second antenna radiator is grounded, the first antenna radiator is used for sending or/and receiving signals of the first frequency band, and the second antenna radiator is used for sending or/and receiving signals of the second frequency band, so that excitation current input through the feed source is divided by the first antenna radiator and the second antenna radiator through the feeding point of the second antenna radiator, the current concentration condition of the antenna device can be balanced to a certain extent, and therefore the current peak value of the whole first antenna radiator is reduced, and the SAR value of the antenna device meets the specified requirement. Therefore, the antenna device provided by the embodiment of the application can ensure that the antenna device has a lower SAR value. Specifically, when the second antenna radiator radiates the second radio frequency signal, the excitation current is split, so that a very strong single point of current does not exist on the radiator of the antenna device basically, but is split into at least two strong points of current (the peak value of the at least two strong points of current split on the first antenna radiator and the second antenna radiator is necessarily smaller than the peak value of the very strong single point of current), and the original SAR single hot spot is approximately dispersed on the first antenna radiator and the second antenna radiator to form weaker SAR multiple hot spots, so that the SAR value of the antenna device meets the regulation requirement. Or even if a single current strong point exists on the radiator of the antenna device, the excitation current is split by the first antenna radiator and the second antenna radiator, so that the current concentration state of the antenna device can be balanced to a certain extent, the peak value of the single current strong point is relatively low, the requirement is met, and the SAR value of the antenna device is further met.
Referring to fig. 12, an embodiment of the present application further provides an electronic device 200, where the electronic device 200 may be, but is not limited to, an electronic device such as a mobile phone, a tablet computer, a smart watch, etc. The electronic device 200 of the present embodiment will be described by taking a mobile phone as an example.
The electronic device 200 includes the feed 30 and the antenna apparatus 100. Wherein the feed is electrically connected to the feed point 111. In the description of the present application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "inner," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience of description of the present application, but do not imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application.
In an embodiment of the present application, the electronic device 200 may further include a housing 1001 and a display screen. The display screen is connected to the housing 1001, and the antenna device is integrated in the housing 1001.
In some embodiments, the display screen generally includes a display panel, and may also include circuitry for responding to touch operations on the display panel, and the like. The display panel may be a liquid crystal display panel (Liquid Crystal Display, LCD), which in some embodiments may be a touch screen at the same time. In the description of the present specification, reference to the term "one embodiment," "some embodiments," or "other embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of terms are not necessarily for the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, features of different embodiments or examples described in the present specification may be combined and combined by those skilled in the art without contradiction.
In this embodiment, the housing 1001 includes a rear housing 1010 and a middle frame 1011, and the rear housing 1010 and the display screen are respectively disposed on two opposite sides of the middle frame 1011.
Referring to fig. 13, the middle frame 1011 may be an integrally formed structure, which may be structurally divided into a supporting portion 1012 and a frame 1013 surrounding the supporting portion 1012. It should be understood that the "carrier 1012" and "frame 1013" are merely named and divided for convenience of description, and the structure filling diagonal lines in the drawing are merely identified for distinction, and do not represent the actual structures of the two, and may not have obvious dividing lines therebetween, or may be assembled by two or more components, and the naming of the "carrier 1012" and "frame 1013" should not limit the structure of the central frame 1011. The supporting portion 1012 is used for supporting a part of the structure of the display screen, and may also be used for supporting or mounting electronic components of the electronic device 200, such as the motherboard 1005, the battery 1006, the sensor module 1007, etc., and the bezel 1013 is connected to the periphery of the supporting portion 1012. Further, the frame 1013 is disposed around the outer periphery of the carrier 1012 and protrudes relative to the surface of the carrier 1012, so that the two together form a space for accommodating the electronic component. In this embodiment, the display cover is disposed on the frame 1013, and the frame 1013, the rear case 1010, and the display form an exterior surface of the electronic device 200.
In this embodiment, the antenna apparatus 100 may be any one of the antenna apparatuses 100 provided in the above embodiment, or may be provided with any one or a combination of multiple features of the above antenna apparatus 100, and the related features may be referred to the foregoing embodiment, which is not described in detail.
In some embodiments, the antenna device 100 is integrated into the housing 1001, for example, the antenna device 100 may be disposed on the middle frame 1011 or on the rear case 1010, which is not limited in this specification. The antenna device 100 of the present embodiment may include a first antenna radiator 110 and a second antenna radiator 120, which are substantially the same as the aforementioned antenna devices. The first antenna radiator 110 may be disposed on the middle frame 1011, and the second antenna radiator 120 may be disposed on the carrier 1012.
Further, in the embodiment shown in fig. 13, the bezel 1013 is at least partially made of metal, and the antenna device 100 is integrated with the bezel 1013. In this embodiment, the bezel 1013 includes at least a portion of a metal structure that forms the first antenna radiator 110. In this way, the metal frame 1013 is used as a part of the radiator of the antenna device 100, which is beneficial to saving space in the electronic device 200, and also provides a larger headroom for the antenna device 100, which is beneficial to ensuring higher radiation efficiency. In some embodiments, the second antenna radiator 120 is disposed on the carrier 1012, and the antenna radiator may be one of a flexible circuit board antenna radiator, a laser direct structuring antenna radiator, and a printing direct structuring antenna radiator, so that the second antenna radiator may be disposed on the middle frame 1011 or the rear case 1010, and may be used for detecting a target object, and generating an induction signal when a capacitance is formed between the second antenna radiator and the target object.
Further, in this embodiment of the present application, the main board 1005 is disposed on the carrying portion 1012, a certain distance is provided between the edge of the main board 1005 and the first antenna radiator, so as to ensure that the antenna device has a larger clearance area, and the current concentration position on the main board 1005 and the current concentration position on the antenna device are dispersed as much as possible, so that the SAR value of the antenna device can be reduced to a certain extent. In this embodiment, the distance between the motherboard 1005 and the first antenna radiator may be 1-5mm, for example, the distance between the motherboard 1005 and the first antenna radiator may be 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, etc.
In the antenna device and the electronic equipment provided by the embodiments of the present invention, the antenna device includes a first antenna radiator and a second antenna radiator, one end of the first antenna radiator is provided with a feed point, the feed point is used for connecting a feed source, one end of the second antenna radiator is connected with the feed point, the other end of the second antenna radiator is grounded, the first antenna radiator is used for transmitting or/and receiving signals in a first frequency band, and the second antenna radiator is used for transmitting or/and receiving signals in a second frequency band, therefore, through connecting the second antenna radiator to the feed point of the first antenna radiator, excitation current input through the feed source is split by the first antenna radiator and the second antenna radiator, current concentration conditions of the antenna device can be balanced to a certain extent, thereby reducing current peaks of the whole first antenna radiator, and a single point of current does not basically exist on the radiator of the antenna device, but is split into at least two current strong points (the peak of the current strong points split on the first antenna radiator and the second antenna radiator is smaller than the peak of the current strong point of the first antenna radiator), so that the single point of current strong point is split to be weaker than the peak of the current strong peak of the first antenna radiator, and the first SAR is further formed by the first antenna radiator, and the SAR is more than the first SAR has a requirement of the first antenna and is formed.
It should be noted that, in the present specification, when one component is considered to be "disposed on" another component, it may be connected to or directly disposed on the other component, or there may be an intervening component (i.e., an indirect connection between the two).
In this specification, particular features or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction. Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, one of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not drive the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of the present application.
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| CN202110586740.8A CN115411503B (en) | 2021-05-27 | 2021-05-27 | Antenna devices and electronic equipment |
| PCT/CN2022/086085 WO2022247493A1 (en) | 2021-05-27 | 2022-04-11 | Antenna apparatus and electronic device |
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| CN118281541A (en) * | 2022-12-30 | 2024-07-02 | Oppo广东移动通信有限公司 | Antenna assembly and electronic equipment |
| CN119315276A (en) * | 2024-12-17 | 2025-01-14 | 北京国电高科科技有限公司 | A memory metal frequency-adjustable antenna circuit, antenna system and communication equipment |
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| WO2022247493A1 (en) | 2022-12-01 |
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