CN114899587A - Antenna, electronic device and communication method - Google Patents
Antenna, electronic device and communication method Download PDFInfo
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- CN114899587A CN114899587A CN202210461851.0A CN202210461851A CN114899587A CN 114899587 A CN114899587 A CN 114899587A CN 202210461851 A CN202210461851 A CN 202210461851A CN 114899587 A CN114899587 A CN 114899587A
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- 238000004891 communication Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000006698 induction Effects 0.000 claims description 14
- 230000001939 inductive effect Effects 0.000 claims description 9
- 230000001965 increasing effect Effects 0.000 description 10
- 230000000875 corresponding effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000004907 flux Effects 0.000 description 4
- 230000002238 attenuated effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000013598 vector Substances 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
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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
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses an antenna, an electronic device and a communication method, wherein the antenna comprises: NFC active antenna coil, at least one passive coil and the controller that is connected with the switch, wherein: the at least one passive coil connected with the switch is connected with the controller, the at least one passive coil connected with the switch is arranged in the NFC active antenna coil, and the geometric center of the at least one passive coil connected with the switch is deviated from the geometric center of the NFC active antenna coil; the controller controls the switch in at least one of the passive coils remote from the sensing area to be closed when a partial area of the NFC active antenna coil is opposite to the sensing area of the NFC terminal for communication.
Description
Technical Field
The present invention relates to the field of electronic communications technologies, and in particular, to an antenna, an electronic device, and a communication method.
Background
Near Field Communication (NFC) is a short-range high-frequency radio technology, which is evolved from contactless radio frequency identification, and combines the functions of an inductive card reader, an inductive card and a point-to-point on a single chip, so as to perform identification and data exchange with compatible devices in a short distance. At present, the NFC function on the mobile phone enables daily use of a user to be more convenient and fast, and can be used as a bus card, an access card, a meal card and the like.
Under some scenes, communication is carried out between an NFC terminal with an NFC function and an NFC reader, the NFC antenna with the NFC terminal comprises an NFC antenna coil, induced current is induced by a magnetic field generated by an active coil in the NFC reader through the NFC antenna coil, so that the NFC terminal is driven to work, when the NFC antenna coil and the active coil of the NFC reader are dislocated, magnetic field vectors generated by the active coil of the NFC reader are opposite inside and outside the active coil, the magnetic field in the NFC antenna coil is superposition of vectors in two directions, so that magnetic flux in the NFC antenna coil can be reduced, the dislocation degree between the NFC antenna coil and the active coil is larger, the magnetic flux in the NFC antenna coil is smaller, the induced current generated by the NFC antenna coil is smaller, and the NFC terminal cannot be driven to work. Therefore, an inoperable area, that is, a blind area, of the NFC antenna may occur, resulting in poor NFC performance of the NFC terminal, and therefore how to enlarge an operable area of the NFC antenna in the blind area is a technical problem that needs to be solved by a person skilled in the art.
Disclosure of Invention
The invention discloses an antenna, electronic equipment and a communication method, which aim to solve the problem of poor NFC performance of an NFC terminal.
In a first aspect, an embodiment of the present application discloses an antenna, configured to communicate with an NFC terminal, including: NFC active antenna coil, at least one passive coil and the controller that is connected with the switch, wherein: the at least one passive coil connected with a switch is connected with the controller, the at least one passive coil connected with a switch is arranged in the NFC active antenna coil, and the geometric center of the at least one passive coil connected with a switch is deviated from the geometric center of the NFC active antenna coil; the controller controls the switch in at least one of the passive coils remote from the sensing area to be closed when a partial area of the NFC active antenna coil is opposite to the sensing area of the NFC terminal for communication.
In a second aspect, an embodiment of the present application discloses an electronic device, including a device motherboard and the antenna of the first aspect, the device motherboard includes an antenna chip, and the antenna is electrically connected to the antenna chip.
In a third aspect, an embodiment of the present application discloses a communication method applied to the electronic device in the second aspect, including: detecting the relative position of an NFC active antenna coil and an induction area of an NFC terminal; controlling the switch in at least one of the passive coils, which is far away from the inductive area, to be closed when the partial area of the NFC active antenna coil is opposite to the inductive area of the NFC terminal.
The technical scheme disclosed by the embodiment of the application comprises the following steps: NFC active antenna coil, at least one passive coil and the controller that is connected with the switch, wherein: the at least one passive coil connected with a switch is connected with the controller, the at least one passive coil connected with a switch is arranged in the NFC active antenna coil, and the geometric center of the at least one passive coil connected with a switch is deviated from the geometric center of the NFC active antenna coil; the controller controls the switch in at least one of the passive coils remote from the sensing area to be closed when a partial area of the NFC active antenna coil is opposite to the sensing area of the NFC terminal for communication. Consequently through the magnetic field in the reinforcing NFC active antenna coil to the magnetic flux in the passive coil at increase NFC terminal, thereby the working area in the work blind area at increase NFC terminal improves the NFC performance at NFC terminal.
Drawings
Fig. 1 is a schematic structural diagram of a communication device according to an embodiment of the present invention;
fig. 2 to fig. 7 are schematic structural diagrams of a first antenna according to an embodiment of the disclosure;
fig. 8 to fig. 10 are schematic structural diagrams of a second antenna according to the disclosure of the embodiment of the present invention;
fig. 11 to fig. 13 are schematic structural diagrams of a third antenna according to the disclosure of the present invention;
fig. 14 to fig. 24 are schematic structural diagrams of a fourth antenna disclosed in the embodiment of the present invention;
fig. 25 to 29 are schematic structural diagrams of a fifth antenna according to the disclosure of the embodiment of the present invention
Fig. 30 is a flowchart illustrating a communication method according to an embodiment of the present invention.
Description of reference numerals:
100-electronic device, 101-NFC active antenna coil, 102-passive coil, 103-switch;
200-NFC terminal, 201-antenna coil;
300-blind area.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The technical solutions disclosed in the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Referring to fig. 1 to 29, an embodiment of the present application discloses a communication device, including an electronic device 100 and an NFC terminal 200, where the electronic device is provided with a device motherboard and an antenna, the device motherboard includes an antenna chip, and the antenna is electrically connected to the antenna chip, where the electronic device 100 may be a mobile phone, a tablet, or the like, the antenna chip may be an NFC chip, and the antenna may include an NFC active antenna coil, and the NFC active antenna coil may communicate with the NFC terminal 200.
The NFC terminal 200 includes an antenna coil, an area where the antenna coil of the NFC terminal 200 is located is an induction area of the NFC terminal 200, the NFC active antenna coil 101 of the electronic device 100 is arranged opposite to the antenna coil 201, the NFC active antenna coil 101 generates an induction magnetic field when being powered on, and the antenna coil 201 induces an induction current in a magnetic field generated by the NFC active antenna coil 101, so that communication is performed between the NFC active antenna coil 101 and the NFC terminal.
When the partial region of the NFC active antenna coil 101 is opposite to the sensing region of the NFC terminal, that is, the partial region of the NFC active antenna coil 101 is opposite to the antenna coil 201, it is described that the NFC active antenna coil 101 is misaligned with the sensing region of the NFC terminal, and at this time, the switch 103 of the passive coil 102 in at least one passive coil far from the sensing region of the NFC terminal is controlled to be closed. With the switch 103 closed, a current opposite to the current in the NFC active antenna coil 101 is generated in the passive coil 102, the direction of the magnetic field outside the coil of the passive coil 102 is in the same direction as the direction of the magnetic field inside the coil of the NFC active antenna coil 101, and the direction of the magnetic field inside the coil of the antenna coil 201 includes the direction of the magnetic field outside the coil of the passive coil 102, the direction of the magnetic field inside the coil of the NFC active antenna coil 101, and the direction of the magnetic field outside the coil of the NFC active antenna coil 101.
Specifically, the antenna coil 201 of the NFC terminal 200 and the NFC active antenna coil 101 of the electronic device 100 may have a square shape or a circular shape, the passive coil 102 may be configured to conform to the shape of the NFC active antenna coil 101, and the area of the passive coil 102 is smaller than that of the NFC active antenna coil 101. When the geometric centers of the NFC active antenna coil 101 and the antenna coil 201 of the electronic device 100 are aligned, the communication efficiency between the NFC terminal 200 and the electronic device 100 is high, and the success rate of card reading of the NFC terminal 200 is improved, when the geometric centers of the NFC active antenna coil 101 and the antenna coil 201 of the electronic device 100 are deviated, that is, the NFC active antenna coil 101 and the antenna coil 201 are misaligned, the success rate of card reading of the NFC terminal 200 is low, and therefore, increasing the area in which the electronic device 100 can work in the NFC dead zone is a necessary way to improve the success rate of card reading of the NFC terminal 200.
The antenna disclosed by the embodiment of the application is used for communicating with an NFC terminal, and comprises an NFC active antenna coil 101, a controller (not shown in the figure) and at least one passive coil 102 connected with a switch 103, wherein the at least one passive coil 102 connected with the switch 103 is connected with the controller, the at least one switch 103 is connected with and arranged in the NFC active antenna coil 101, and the geometric center of the at least one passive coil 102 connected with the switch 103 deviates from the geometric center of the NFC active antenna coil 101. When a partial area of the NFC active antenna coil 101 is opposite to the sensing area of the NFC terminal 200 for communication, the controller controls the switch in at least one passive coil 102 far away from the sensing area to be closed, so that a current opposite to the current in the NFC active antenna coil 101 is generated in the passive coil 102, and correspondingly, the direction of the magnetic field outside the passive coil 102 is in the same direction as the direction of the magnetic field inside the NFC active antenna coil 101.
The switch 103 may be a single-pole single-throw switch, the passive coil 102 may be disposed in the NFC active antenna coil 101 and far away from the antenna coil, one passive coil 102 is connected to the single-pole single-throw switch, one end of the passive coil 102 is used for being connected to a moving contact of the single-pole single-throw switch, one end of the passive coil 102 is connected to a stationary contact of the single-pole single-throw switch, and the NFC active antenna coil 101 and the passive coil 102 connected to the switch 103 are located on the same horizontal plane. When the switch 103 is open, the passive coil 102 in the NFC active antenna coil 101 is not closed, and no coupling current is generated in the passive coil 102, and when the switch 103 is closed, the passive coil 102 in the NFC active antenna coil 101 is closed, and an induced current having a direction opposite to that of the current in the NFC active antenna coil 101 is generated in the passive coil 102, the direction of the magnetic field inside the passive coil 102 is opposite to that of the magnetic field inside the NFC active antenna coil 101, and the direction of the magnetic field outside the passive coil 102 is the same as that of the magnetic field inside the NFC active antenna coil 101.
In one possible implementation, the passive coil 102 is a single passive coil 102, and the passive coil 102 is embedded in the edge region of the NFC active antenna coil 101.
For example, taking the example of fig. 3 where the NFC active antenna coil 101 is shifted to the right with respect to the antenna coil 201 of the NFC terminal 200, as shown in fig. 2 to 7, after the terminal device is powered on, the current direction of the NFC active antenna coil 101 built in the terminal device is clockwise, the passive coil 102 with the single-pole single-throw switch is built in the NFC active antenna coil 101, and when the single-pole single-throw switch is turned off, the passive coil 102 in the NFC active antenna coil 101 is not closed, so that a coupling current is not generated, the magnetic field direction in the loop of the NFC active antenna coil 101 is inward, and the magnetic field direction in the loop of the NFC active antenna coil 101 is outward. When the single-pole single-throw switch is closed, the passive coil 102 in the NFC active antenna coil 101 is closed, and an induced current having a direction opposite to that of the NFC active antenna coil 101 is generated, a magnetic field generated by the induced current of the passive coil 102 in the coil of the passive coil 102 has a direction opposite to that of a magnetic field in the coil of the NFC active antenna coil 101, and a magnetic field generated by the induced current of the passive coil 102 outside the coil of the passive coil 102 has the same direction as that of a magnetic field in the coil of the NFC active antenna coil 101. After the magnetic field generated by the induced current of the passive coil 102 outside the passive coil 102 is superposed with the magnetic field in the coil of the NFC active antenna coil 101, the magnetic field on the left side inside the NFC active antenna coil 101 is enhanced, when the passive coil 102 is located on the right side of the NFC active antenna coil 101, because the magnetic field generated by the passive coil 102 is relatively greatly attenuated, the change of the magnetic field is not obvious, at this time, the position where the magnetic field in the coil of the NFC active antenna coil 101 and the magnetic field generated by the antenna coil of the NFC terminal 200 are mutually offset can be moved leftward, therefore, the blind area 300 also moves leftward, so that the working area of NFC in the blind area 300 is increased, the NFC performance of the NFC terminal is improved, and the success rate of NFC card swiping and card reading is effectively improved.
In one possible implementation manner, when the partial region of the NFC active antenna coil 101 is opposite to the sensing region of the NFC terminal 200 for communication, the switching state of the switch 103 in each passive coil 102 is sequentially switched from the open state to the closed state until the switching state of the switch 103 of at least one passive coil 102 far away from the sensing region is switched to the closed state.
Further, taking the example that the NFC active antenna coil 101 in fig. 3 is deviated to the right with respect to the antenna coil 201 of the NFC terminal 200, as shown in fig. 8 to fig. 10, two passive coils 102 with single-pole single-throw switches may be additionally disposed in the NFC active antenna coil 101, and four states may be combined by the two single-pole single-throw switches to generate four different effects, and when both switches 103 are in an off state, there is no influence on the magnetic field in the NFC active antenna coil 101; when the switch 103 of the passive coil 102 on the left side in the NFC active antenna coil 101 is closed and the switch 103 of the passive coil 102 on the right side in the NFC active antenna coil 101 is opened, the blind area 300 will move rightward (optimizing the blind area on the right side), increasing the area in the blind area 300 where NFC can work; when the switch 103 of the passive coil 102 on the left side in the NFC active antenna coil 101 is turned off and the switch 103 of the passive coil 102 on the right side of the NFC active antenna coil 101 is turned on, the blind area 300 moves to the left (the left blind area is optimized), so that the working area of NFC in the blind area is increased; when the switch 103 of the left passive coil 102 of the NFC active antenna coil 101 and the switch 103 of the right passive coil 102 of the NFC active antenna coil 101 are both closed, the blind area 300 may present a state in which the periphery is expanded outward, which increases the working area of NFC in the blind area.
In one possible implementation, the passive coils 102 are multiple, the switch 103 may be a single-pole double-throw switch, and two adjacent passive coils 102 are connected to the single-pole double-throw switch.
At least one passive coil 102 connected with a switch in the NFC active antenna coil 101 is arranged at intervals, and the NFC active antenna coil 101 and the at least one passive coil 102 connected with a switch 103 are located on the same horizontal plane. The passive coils 102 may be located in the NFC active antenna coil 101 at a position remote from the antenna coil, one passive coil 102 being connected to one single pole single throw switch. One end of each of the two adjacent passive coils 102 is connected to a fixed contact of the single-pole double-throw switch, the other end of one passive coil 102 of the two adjacent passive coils 102 is used for being connected to a first movable contact of the single-pole double-throw switch, and the other end of the other passive coil 102 is used for being connected to a second movable contact of the single-pole double-throw switch.
Specifically, as shown in fig. 11 to 13, two passive coils 102 in the NFC active antenna coil 101 are disposed adjacent to each other, and a single-pole double-throw switch is connected between the two passive coils 102, three different effects can be produced by three states of the single-pole double-throw switch, when the single-pole double-throw switch is turned off, the passive coil 102 in the NFC active antenna coil 101 is not closed, so that no coupling current is generated, the direction of the magnetic field in the coil of the NFC active antenna coil 101 is inward, and the direction of the magnetic field in the coil of the NFC active antenna coil 101 is outward.
When the single pole double throw switch is in a connected state with the port 1, the left passive coil 102 in the NFC active antenna coil 101 is closed, and an induced current in a direction opposite to that of the current in the NFC active antenna coil 101 is generated, a magnetic field generated by the induced current in the passive coil 102 in the coil of the passive coil 102 is in a direction opposite to that of a magnetic field in the coil of the NFC active antenna coil 101, and a magnetic field generated by the induced current in the passive coil 102 outside the coil of the passive coil 102 is in the same direction as that of the magnetic field in the coil of the NFC active antenna coil 101. After the magnetic field generated by the induced current of the passive coil 102 outside the passive coil 102 is superposed with the magnetic field in the coil of the NFC active antenna coil 101, the magnetic field on the right side inside the NFC active antenna coil 101 is enhanced, when the passive coil 102 is located on the left side of the NFC active antenna coil 101, because the magnetic field generated by the passive coil 102 is relatively greatly attenuated, the change of the magnetic field is not obvious, at this time, the position where the magnetic field in the coil of the NFC active antenna coil 101 and the magnetic field generated by the antenna coil of the NFC terminal 200 are mutually offset can move to the right, therefore, the blind area also moves to the right, thereby increasing the working area of NFC in the blind area, improving the NFC performance of the NFC terminal, and effectively improving the success rate of NFC swiping and reading cards.
When the single pole double throw switch is in a connected state with the port 2, the passive coil 102 on the right side in the NFC active antenna coil 101 is closed, an induced current in a direction opposite to the current direction of the NFC active antenna coil 101 is generated, a magnetic field generated by the induced current of the passive coil 102 in the coil of the passive coil 102 is in a direction opposite to the magnetic field generated by the coil of the NFC active antenna coil 101, and a magnetic field generated by the induced current of the passive coil 102 outside the coil of the passive coil 102 is in the same direction as the magnetic field generated by the coil of the NFC active antenna coil 101. After the magnetic field generated by the induced current of the passive coil 102 outside the coil of the passive coil 102 is superposed with the magnetic field in the coil of the NFC active antenna coil 101, the magnetic field on the left side inside the NFC active antenna coil 101 is enhanced, when the passive coil 102 is located on the right side of the NFC active antenna coil 101, because the magnetic field generated by the passive coil 102 is relatively greatly attenuated, the change of the magnetic field is not obvious, at this time, the position where the magnetic field in the coil of the NFC active antenna coil 101 and the magnetic field generated by the antenna coil of the NFC terminal 200 are mutually offset can be moved leftward, therefore, the blind area also moves leftward, thereby the working area of NFC in the blind area is increased, the NFC performance of the NFC terminal is improved, and the success rate of NFC swiping and reading cards is effectively improved.
Further, taking the example in fig. 3 that the NFC active antenna coil 101 is displaced rightward with respect to the antenna coil of the NFC terminal 200, the NFC active antenna coil 101 has a plurality of passive coils 102 built therein, the plurality of passive coils 102 are spaced apart from each other in the NFC active antenna coil 101, and when the NFC active antenna coil 101 is misaligned with the antenna coil, the switch 103 of the passive coil 102 located at a position away from the antenna coil in the NFC active antenna coil 101 is closed. As shown in fig. 14 to 24, adding four passive coils 102 with single-pole single-throw switches to the NFC active antenna coil 101 can produce sixteen different effects through sixteen states of four single-pole single-throw switches combination, where S1 denotes the switch at the upper left corner, S2 denotes the switch at the upper right corner, S3 denotes the switch at the lower left corner, and S4 denotes the switch at the lower right corner. As shown in table 1, where 0 indicates that the switch 103 is in an open state and 1 indicates that the switch 103 is in a closed state.
TABLE 1 switching states and corresponding effects
When the single-pole single-throw switch is in a closed state, the passive coil 102 in the NFC active antenna coil 101 is closed, an induced current in a direction opposite to that of the current in the NFC active antenna coil 101 is generated, a magnetic field generated by the induced current in the passive coil 102 in the coil of the passive coil 102 is in a direction opposite to that of the magnetic field in the coil of the NFC active antenna coil 101, and a magnetic field generated by the induced current in the passive coil 102 outside the coil of the passive coil 102 in a direction identical to that of the magnetic field in the coil of the NFC active antenna coil 101. The induced current of the passive coil 102 increases the magnetic field inside the NFC active antenna coil 101 after the magnetic field generated outside the coil of the passive coil 102 is superimposed with the magnetic field inside the coil of the NFC active antenna coil 101. Therefore, the blind area can also be moved, so that the working area of the NFC in the blind area is increased, the NFC performance of the NFC terminal is improved, and the success rate of NFC card swiping and reading is effectively improved.
Further, in actual operation, in a normal state, the switches 103 of the four passive coils 102 are all in an off state, and when the NFC active antenna coil 101 of the electronic device 100 is in the work blind area 300, the four single-pole single-throw switches may be traversed until the NFC terminal is in a state in which the NFC terminal can work. The four passive coils 102 with single-pole single-throw switches are used for realizing the self-adaptive optimization of the dead zones of the NFC terminal 200 in more directions, and the working performance of NFC in different directions can be further improved.
Further, taking the example in fig. 3 that the NFC active antenna coil 101 is displaced rightward with respect to the antenna coil of the NFC terminal 200, the NFC active antenna coil 101 has a plurality of passive coils 102 built therein, the plurality of passive coils 102 are spaced apart from each other in the NFC active antenna coil 101, and when the NFC active antenna coil 101 is misaligned with the antenna coil, the switch 103 of the passive coil 102 located at a position away from the antenna coil in the NFC active antenna coil 101 is closed. As shown in fig. 25 to 29, two passive coils 102 with single-pole double-throw switches are added to the NFC active antenna coil 101, and four different effects can be produced by four states of a combination of the two passive coils with single-pole double-throw switches, as shown in table 2, where S1 denotes an upper side switch, S2 denotes a lower side switch, 1 denotes a connection state of the switch S1 to the port 1, 2 denotes a connection state of the switch S1 to the port 2, 3 denotes a connection state of the switch S2 to the port 3, and 4 denotes a connection state of the switch S2 to the port 4.
TABLE 2 switch states and corresponding effects
| Switch 103 state (S1, S2) | Effect |
| (1,3) | Optimizing right side blind zone |
| (2,3) | Optimizing left side blind zone |
| (1,4) | Optimizing blind areas at upper right corner and lower left corner |
| (2,4) | Optimizing blind areas at upper left corner and lower right corner |
When the single pole double throw switch is in a state of being connected with the port, the passive coil 102 in the NFC active antenna coil 101 is closed, and an induced current in a direction opposite to that of the NFC active antenna coil 101 is generated, a magnetic field generated by the induced current of the passive coil 102 in the coil of the passive coil 102 is in a direction opposite to that of a magnetic field in the coil of the NFC active antenna coil 101, and a magnetic field generated by the induced current of the passive coil 102 outside the coil of the passive coil 102 is in the same direction as that of the magnetic field in the coil of the NFC active antenna coil 101. The induced current of the passive coil 102 increases the magnetic field inside the NFC active antenna coil 101 after the magnetic field generated outside the coil of the passive coil 102 is superimposed with the magnetic field inside the coil of the NFC active antenna coil 101. Therefore, the blind area can also be moved, so that the working area of the NFC in the blind area is increased, the NFC performance of the NFC terminal is improved, and the success rate of NFC card swiping and reading is effectively improved.
During actual work, when the position of the NFC active antenna coil 101 is in the working blind area 300, state traversal may be performed by starting the two single-pole double-throw switches until the NFC terminal can work, and on the basis of realizing adaptive optimization of card swiping blind areas of the electronic device 100 in more directions, the two single-pole double-throw switches not only increase the area in the blind area where the NFC terminal can work, but also save the space of the electronic device.
As shown in fig. 30, an embodiment of the present application discloses a communication method, which may be executed by the electronic device in the foregoing embodiment, and the method includes the following steps:
step S3000: the relative position of the NFC active antenna coil and the inductive region of the NFC terminal is detected.
Specifically, the relative position between the NFC active antenna coil and the induction area of the NFC terminal includes that the NFC active antenna coil is aligned with the induction area of the NFC terminal and the NFC active antenna coil is misaligned with the induction area of the NFC terminal, and the misalignment position between the NFC active antenna coil and the antenna coil can be determined by the degree of deviation between the NFC antenna and the NFC terminal.
In one possible implementation, detecting the relative position of the NFC active antenna coil and the inductive region of the NFC terminal includes: detecting the actual signal strength of the NFC terminal; and determining the relative position corresponding to the actual signal strength according to the corresponding relation between the signal strength and the relative position, and determining that the partial area of the NFC active antenna coil is opposite to the induction area of the NFC terminal under the condition that the actual signal strength is lower than a threshold value. The relation between the signal strength of the NFC terminal and the relative position between the NFC terminal and the electronic equipment can be stored in the electronic equipment, different relative positions correspond to different signal strengths, the threshold value is used as a reference, the relative position corresponding to the signal strength lower than the threshold value is a positive position, and the relative position corresponding to the signal strength not lower than the threshold value is a dislocation position. The threshold may be determined according to practical situations, and the embodiment of the present application is not limited herein. Therefore, after the electronic device detects the actual signal strength of the NFC terminal, the actual relative position between the NFC terminal and the electronic device is determined according to the correspondence between the signal strength and the relative position.
Step S3001: and controlling the switch in at least one passive coil far away from the induction area to be closed when the partial area of the NFC active antenna coil is opposite to the induction area of the NFC terminal. Such that a current is generated in the passive coil that is opposite to a current in the NFC active antenna coil.
It should be noted that the communication methods disclosed in the embodiments of the present application have the same or similar points as those in the embodiments described above, and reference may be made to the embodiments, and details are not repeated herein.
Through the technical scheme disclosed by the embodiment of the application, the magnetic field in the NFC active antenna coil is enhanced, so that the magnetic flux in the passive coil of the NFC terminal is increased, the working area in the working blind area of the NFC terminal is increased, and the NFC performance of the NFC terminal is improved.
In the above embodiments of the present invention, the difference between the embodiments is mainly described, and different optimization features between the embodiments can be combined to form a better embodiment as long as they are not contradictory, and further description is omitted here in view of brevity of the text.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (11)
1. An antenna for communicating with an NFC terminal, the antenna comprising an NFC active antenna coil, at least one passive coil connected to a switch, and a controller, wherein:
the at least one passive coil connected with a switch is connected with the controller, the at least one passive coil connected with a switch is arranged in the NFC active antenna coil, and the geometric center of the at least one passive coil connected with a switch is deviated from the geometric center of the NFC active antenna coil;
the controller controls the switch in at least one of the passive coils, which is far from the sensing area, to be closed when a partial area of the NFC active antenna coil is opposite to the sensing area of the NFC terminal for communication.
2. The antenna of claim 1, wherein the passive coil is a plurality of passive coils, and wherein the at least one passive coil of the NFC active antenna coils is spaced apart and connected to a switch.
3. An antenna according to claim 1 or 2, characterized in that the NFC active antenna coil and the at least one passive coil with a switch connected thereto are in the same horizontal plane.
4. The antenna of claim 2, wherein the switches comprise single-pole double-throw switches, and two adjacent passive coils are connected to one single-pole double-throw switch;
one end of each of two adjacent passive coils is connected with a fixed contact of the single-pole double-throw switch, the other end of one of the two adjacent passive coils is used for being connected with a first movable contact of the single-pole double-throw switch, and the other end of the other passive coil is used for being connected with a second movable contact of the single-pole double-throw switch.
5. The antenna of claim 2, wherein when the partial area of the NFC active antenna coil is opposite to the inductive area of the NFC terminal for communication, the switch state of the switch in each passive coil is sequentially switched from an open state to a closed state until the switch state of the switch of at least one passive coil far from the inductive area is switched to the closed state.
6. The antenna of claim 1, wherein said switches comprise single-pole single-throw switches, one of said passive coils is connected to one of said single-pole single-throw switches, one end of said passive coil is adapted to be connected to a moving contact of said single-pole single-throw switch, and the other end of said passive coil is connected to a stationary contact of said single-pole single-throw switch.
7. The antenna of claim 1, wherein the passive coil is single, and wherein the passive coil is built into the border region of the NFC active antenna coil.
8. An electronic device, comprising a device main board and the antenna of any one of claims 1 to 7, wherein the device main board comprises an antenna chip, and the antenna is electrically connected to the antenna chip.
9. A communication method applied to the electronic device of claim 8, comprising:
detecting the relative position of an NFC active antenna coil and an induction area of an NFC terminal;
and when the partial area of the NFC active antenna coil is opposite to the induction area of the NFC terminal, controlling the switch in at least one passive coil far away from the induction area to be closed.
10. The communication method of claim 9, wherein detecting the relative position of the NFC active antenna coil and the inductive region of the NFC terminal comprises:
detecting the actual signal strength of the NFC terminal;
and determining the relative position corresponding to the actual signal strength according to the corresponding relation between the signal strength and the relative position, and determining that the partial area of the NFC active antenna coil is opposite to the induction area of the NFC terminal under the condition that the actual signal strength is lower than a threshold value.
11. The communication method according to claim 9, wherein when the partial area of the NFC active antenna coil is opposite to the sensing area of the NFC terminal for communication, the switching state of the switch in each passive coil is sequentially switched from the open state to the closed state until the switching state of the switch of at least one passive coil far from the sensing area is switched to the closed state.
Priority Applications (2)
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| CN202210461851.0A CN114899587A (en) | 2022-04-28 | 2022-04-28 | Antenna, electronic device and communication method |
| PCT/CN2023/090309 WO2023207905A1 (en) | 2022-04-28 | 2023-04-24 | Antenna, electronic device, and communication method |
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| CN202210461851.0A CN114899587A (en) | 2022-04-28 | 2022-04-28 | Antenna, electronic device and communication method |
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| WO (1) | WO2023207905A1 (en) |
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| WO2024056000A1 (en) * | 2022-09-16 | 2024-03-21 | 维沃移动通信有限公司 | Electronic device |
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