CN112449035B - Electronic equipment - Google Patents

Abstract

An embodiment of the present application provides an electronic device, including: a near-field communication chip, configured to provide a differential excitation current; a ground plane, formed with a conductive path; a conductor structure; a capacitive sensor, the capacitive sensor includes a first plate; The conductor structure, the conductive path and the first plate jointly form a conductive loop for transmission of the differential excitation current. In the electronic device, due to the conductor structure and the first plate can be respectively arranged in different parts of the electronic device according to the requirements of the internal space design of the electronic device, and then connected by the conductive path formed on the ground plane to form a loop, so that the design of the NFC antenna can be realized through the conductor structure of different parts of the electronic device and the capacitive sensor with the ground plane, so the polar plate of the capacitive sensor can be reused as the NFC antenna, which can not only save the space occupied by the NFC antenna, but also make the NFC The layout of the antenna can be more flexible.

Description

Electronic equipment

technical field

The present application relates to the field of electronic technology, in particular to an electronic device.

Background technique

With the development of communication technology, electronic devices such as smart phones can realize more and more functions, and the communication modes of electronic devices are also more diversified. For example, a common electronic device may support various communication modes such as cellular network communication, Wireless Fidelity (Wi-Fi) communication, Global Positioning System (Global Positioning System, GPS) communication, Bluetooth (Bluetooth, BT) communication, and the like. In addition, with the advancement of communication technology, electronic devices can gradually realize Near Field Communication (NFC) recently.

On the other hand, with the development of electronic technology, electronic equipment is becoming more and more miniaturized and thinner, and the internal space of electronic equipment is also getting smaller and smaller. Antennas of various communication systems and electronic devices such as sensors occupy a lot of space in electronic equipment. Lots of interior space. Therefore, how to reasonably design the NFC antenna of the electronic device has become a difficult problem.

Contents of the invention

The embodiment of the present application provides an electronic device, which can save the space occupied by the NFC antenna in the electronic device, and the layout of the NFC antenna can be more flexible.

An embodiment of the present application provides an electronic device, including:

A near-field communication chip, including a first differential signal terminal and a second differential signal terminal, the first differential signal terminal and the second differential signal terminal are used to provide a differential excitation current;

a ground plane, including a first ground point and a second ground point arranged at intervals, and the ground plane forms a conductive path between the first ground point and the second ground point;

The conductor structure includes a first feeding end and a first grounding end arranged at intervals, the first feeding end is electrically connected to the first differential signal end, and the first grounding end is electrically connected to the first grounding point. connect;

A capacitive sensor, used to detect the distance of the external conductor, the capacitive sensor includes a first pole plate, and the first pole plate includes a second feeding terminal and a second grounding terminal arranged at intervals, and the second feeding terminal and The second differential signal terminal is electrically connected, and the second ground terminal is electrically connected to the second ground point;

Wherein, the conductor structure, the conductive path and the first plate jointly form a conductive loop for the transmission of the differential excitation current.

In the electronic device provided in the embodiment of the present application, by setting the conductor structure and the first plate of the multiplexing capacitive sensor, and connecting the conductor structure and the first plate to two different ground points of the same ground plane, and The ground plane between the two ground points is used to form a conductive path, so that a conductive loop for NFC differential excitation current transmission can be formed through the conductor structure, the first plate and the conductive path. Since the conductor structure and the first plate can be arranged in different parts of the electronic device according to the requirements of the internal space design of the electronic device, and then connected to form a circuit through the conductive path formed on the ground plane, the electronic The conductor structure of different parts of the device and the capacitive sensor cooperate with the ground plane to realize the design of the NFC antenna, so the plate of the capacitive sensor can be reused as the NFC antenna, which not only saves the space occupied by the NFC antenna, but also makes the layout of the NFC antenna more flexible .

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings that need to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of a first structure of an electronic device provided by an embodiment of the present application.

FIG. 2 is a schematic diagram of a second structure of an electronic device provided by an embodiment of the present application.

Fig. 3 is a schematic diagram of setting an antenna device in an electronic device according to an embodiment of the present application.

FIG. 4 is a schematic diagram of a third structure of an electronic device provided by an embodiment of the present application.

FIG. 5 is a schematic diagram of a fourth structure of an electronic device provided by an embodiment of the present application.

FIG. 6 is a schematic diagram of a fifth structure of an electronic device provided by an embodiment of the present application.

FIG. 7 is a schematic diagram of a sixth structure of an electronic device provided by an embodiment of the present application.

FIG. 8 is a schematic diagram of a seventh structure of an electronic device provided by an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Apparently, the described embodiments are only some of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of this application.

An embodiment of the present application provides an electronic device. The electronic equipment can be devices such as smart phones and tablet computers, and can also be game equipment, AR (Augmented Reality, augmented reality) equipment, automotive equipment, data storage devices, audio playback devices, video playback devices, notebook computers, desktop computing devices, etc. equipment etc.

Referring to FIG. 1 , FIG. 1 is a schematic diagram of a first structure of an electronic device 100 provided in an embodiment of the present application.

The electronic device 100 includes a display screen 10 , a casing 20 , a circuit board 30 and a battery 40 .

Wherein, the display screen 10 is disposed on the casing 20 to form a display surface of the electronic device 100 for displaying information such as images and texts. Wherein, the display screen 10 may include a liquid crystal display (Liquid Crystal Display, LCD) or an organic light-emitting diode display (Organic Light-Emitting Diode, OLED) and other types of display screens.

It can be understood that the display screen 10 may include a display surface and a non-display surface opposite to the display surface. The display surface is the surface of the display screen 10 facing the user, that is, the surface of the display screen 10 visible to the user on the electronic device 100 . The non-display surface is the surface of the display screen 10 facing the inside of the electronic device 100 . Wherein, the display surface is used to display information, and the non-display surface does not display information.

It can be understood that a cover plate may also be provided on the display screen 10 to protect the display screen 10 and prevent the display screen 10 from being scratched or damaged by water. Wherein, the cover plate may be a transparent glass cover plate, so that the user can observe the content displayed on the display screen 10 through the cover plate. It can be understood that the cover plate may be a glass cover plate made of sapphire.

The casing 20 is used to form the outer contour of the electronic device 100, so as to accommodate electronic devices and functional components of the electronic device 100, and at the same time form a sealing and protection function for the electronic devices and functional components inside the electronic device. For example, the camera, circuit board, vibration motor and other functional components of the electronic device 100 can all be arranged inside the casing 20 . It can be understood that the housing 20 may include a middle frame and a battery cover.

Wherein, the middle frame may be a thin plate or sheet structure, or a hollow frame structure. The middle frame is used to provide support for electronic devices or functional components in the electronic device 100 , so as to install the electronic devices and functional components of the electronic device 100 together. For example, structures such as grooves, protrusions, and through holes may be provided on the middle frame to facilitate installation of electronic devices or functional components of the electronic device 100 . It can be understood that the material of the middle frame may include metal or plastic.

The battery cover is connected to the middle frame. For example, the battery cover can be bonded to the middle frame by an adhesive such as double-sided tape to realize the connection with the middle frame. Wherein, the battery cover is used together with the middle frame and the display screen 10 to seal the electronic devices and functional components of the electronic device 100 inside the electronic device 100 to protect the electronic devices and functional components of the electronic device 100 . Understandably, the battery cover can be integrally formed. During the forming process of the battery cover, structures such as rear camera mounting holes can be formed on the battery cover. Understandably, the material of the battery cover may also include metal or plastic.

The circuit board 30 is disposed inside the casing 20 . For example, the circuit board 30 can be installed on the middle frame of the casing 20 for fixing, and the circuit board 30 can be sealed inside the electronic device through the battery cover. Wherein, the circuit board 30 may be a main board of the electronic device 100 . One or more functional components such as a processor, a camera, an earphone jack, an acceleration sensor, a gyroscope, and a motor may also be integrated on the circuit board 30 . Meanwhile, the display screen 10 can be electrically connected to the circuit board 30 so as to control the display of the display screen 10 through the processor on the circuit board 30 . It can be understood that due to the limitation of the internal design space of the electronic device 100, the circuit board 30 may also include a plurality of independent circuit boards arranged at intervals from each other, for example, may include a main circuit board and an auxiliary circuit board arranged at intervals from each other. Electronic devices or functional components can be integrated on the circuit board and the sub-circuit board.

The battery 40 is provided inside the housing 20 . For example, the battery 40 can be installed on the middle frame of the casing 20 for fixing, and the battery 40 can be sealed inside the electronic device through the battery cover. Meanwhile, the battery 40 is electrically connected to the circuit board 30 , so that the battery 40 supplies power to the electronic device 100 . Wherein, the circuit board 30 may be provided with a power management circuit. The power management circuit is used to distribute the voltage provided by the battery 40 to various electronic devices in the electronic device 100 .

Wherein, the electronic device 100 is further provided with an antenna device. The antenna device is used to realize the wireless communication function of the electronic device 100 , for example, the antenna device may be used to realize the near field communication (NFC communication) function. The antenna device is arranged inside the casing 20 of the electronic device 100 . Wherein, it can be understood that some components of the antenna device can be integrated on the circuit board 30 inside the housing 20, for example, the signal processing chip and signal processing circuit in the antenna device can be integrated on the circuit board 30 superior. In addition, some components of the antenna device may also be directly arranged inside the casing 20 . For example, radiators or conductor structures used by the antenna device for radiating signals may be arranged directly inside the housing 20 .

Referring to FIG. 2 , FIG. 2 is a second schematic structural diagram of an electronic device 100 provided in an embodiment of the present application. Wherein, the antenna device includes a near field communication chip 21 , a ground plane 22 and a conductor structure 23 . The electronic device 100 also includes a capacitive sensor 31 and a sensor processing circuit 32 .

Wherein, a near field communication chip (NFC chip) 21 may be used to provide differential excitation current. The differential excitation current includes two current signals. The amplitudes of the two current signals are the same and the phases are opposite, or it can be understood that the phases of the two current signals differ by 180 degrees. In addition, the differential excitation current is a balanced signal. It can be understood that if the analog signal is directly transmitted during the transmission process, it is an unbalanced signal; if the original analog signal is inverted, then the inverted analog signal and the original analog signal are transmitted at the same time, and the inverted analog signal and the original The analog signal is called a balanced signal. The balanced signal passes through the differential amplifier during the transmission process, and the original analog signal and the inverted analog signal are subtracted to obtain an enhanced original analog signal. Since the two transmission lines are subject to the same interference during the transmission process, the subtraction In the process, the same interference signal is subtracted, so the anti-interference performance of the balanced signal is better.

The NFC chip 21 includes a first differential signal terminal 211 and a second differential signal terminal 212 . For example, the first differential signal terminal 211 may be a positive (+) port of the NFC chip 21 , and the second differential signal terminal 212 may be a negative (−) port of the NFC chip 21 . The first differential signal terminal 211 and the second differential signal terminal 212 are used to provide the differential excitation current. For example, the differential excitation current provided by the NFC chip 21 can be output to the antenna device via the first differential signal terminal 211, and flow back into the NFC chip 21 via the second differential signal terminal 212, thereby form a current loop.

Wherein, it can be understood that the NFC chip 21 can be arranged on the circuit board 30 of the electronic device 100, or a smaller independent circuit board can be arranged in the electronic device 100, and the NFC chip 21 can be integrated into the circuit board 30 of the electronic device 100. described above on a separate circuit board. The independent circuit board may be, for example, a secondary circuit board in the electronic device 100 .

The ground plane 22 is used to form a common ground. Wherein, the ground plane 22 may be formed by a conductor, a printed circuit or a metal printed layer in the electronic device 100 . For example, the ground plane 22 may be disposed on the circuit board 30 of the electronic device 100 . The ground plane 22 can also be formed on the casing 20 of the electronic device 100, for example, the ground plane 22 can be formed through the middle frame of the casing 20, or the battery cover of the casing 20 can also be used to form the ground plane 22. ground plane 22.

The ground plane 22 includes a first ground point 221 and a second ground point 222 arranged at intervals. The first ground point 221 and the second ground point 222 can be, for example, the ends of the ground plane 22, or can also be raised structures on the ground plane 22, or can also be the ends of the ground plane 22. 22 , or a certain area on the ground plane 22 , and so on.

Wherein, the ground plane 22 forms a conductive path between the first ground point 221 and the second ground point 222 , and the conductive path can be used to conduct current. That is, when a voltage signal is applied to the first ground point 221 and the second ground point 222, a current can be generated between the first ground point 221 and the second ground point 222, thereby forming a current loop . It can be understood that when the NFC chip 21 provides a differential excitation current, the conductive path between the first ground point 221 and the second ground point 222 can be used to transmit the differential excitation current.

The conductor structure 23 includes a first feeding end 231 and a first grounding end 232 arranged at intervals. The first feed end 231 is electrically connected to the first differential signal end 211 of the NFC chip 21 , so that the first differential signal end 211 feeds power to the first feed end 231 . For example, the differential excitation current provided by the NFC chip 21 may be transmitted to the first feed terminal 231 via the first differential signal terminal 211 , so as to feed power to the conductor structure 23 . The first ground terminal 232 is electrically connected to the first ground point 221 of the ground plane 22 , so as to realize the ground return of the conductor structure 23 .

It can be understood that the conductor structure 23 may be a metal structure in the electronic device 100 or a structure such as a metal trace on a circuit board. For example, the conductor structure 23 may be a metal branch formed on the casing 20, for example, the conductor structure 23 may be a metal branch formed on the middle frame of the casing 20, or the conductor structure 23 may be a casing 20 metal stubs formed on the battery cover. For another example, the electronic device 100 may include a camera, a decorative ring made of metal may be arranged around the camera, and the conductor structure 23 may be the decorative ring. For another example, the conductor structure 23 may also be a metal trace on a flexible printed circuit (FPC) in the electronic device 100, and the FPC may be, for example, an FPC of a display screen, an FPC of a camera, or an FPC of a motor. and other structures. For another example, the conductor structure 23 may also be a printed circuit on the circuit board 30 of the electronic device 100 .

The capacitive sensor 31 is disposed inside the housing 20 . For example, the capacitive sensor 31 can be arranged on the middle frame of the casing 20 for fixing. Alternatively, the capacitive sensor 31 can also be arranged on the circuit board 30 . Wherein, the capacitive sensor 31 is used to detect the distance of the external conductor. The external conductor may be, for example, a human body, such as a user's hand, face and other parts. The external conductor may also be an external metal object, such as an NFC receiver (such as a subway card reader) and the like. The capacitive sensor 31 can be used as a proximity sensor of the electronic device 100 to detect the distance of an external conductor, so as to detect the approach or distance of an external object such as a human body or a metal object. In addition, the capacitive sensor 31 can also be used as a touch sensor of the electronic device 100 to detect a user's touch operation.

The capacitive sensor 31 includes a first plate, such as the first plate 24 . The first pole plate 24 can be multiplexed as an NFC antenna, so as to transmit the differential excitation current through the first pole plate 24 . Wherein, the first pole plate 24 includes a second feeding terminal 241 and a second grounding terminal 242 arranged at intervals. The second feed terminal 241 is electrically connected to the second differential signal terminal 212 of the NFC chip 21 , so as to realize the power feeding from the second differential signal terminal 212 to the second feed terminal 241 . For example, the differential excitation current provided by the NFC chip 21 can be transmitted to the second differential signal terminal 212 via the second feed terminal 241 , so as to feed power to the first plate 24 . The second ground terminal 242 is electrically connected to the second ground point 222 of the ground plane 22 , so as to realize the return of the first plate 24 to ground.

It can be understood that the capacitive sensor 31 also includes a second plate, such as the second plate 311 . The second pole plate 311 is spaced apart from the first pole plate 24 . Wherein, both the second pole plate 311 and the first pole plate 24 are metal pole plates, for example, both may be copper alloy pole plates. The second pole plate 311 can be arranged in parallel with the first pole plate 24 to form a parallel plate capacitor; or, the first pole plate 24 can be arranged around the outer periphery of the second pole plate 311 . It can be understood that an insulating medium may also be provided between the second pole plate 311 and the first pole plate 24 .

The sensor processing circuit 32 is electrically connected to the capacitive sensor 31 . Wherein, it can be understood that the sensor processing circuit 32 may be electrically connected to both the first plate 24 and the second plate 311 of the capacitive sensor 31 , so as to process the signal detected by the capacitive sensor 31 . Wherein, the sensor processing circuit 32 may be disposed on the circuit board 30 of the electronic device 100 , or the sensor processing circuit 32 may also be integrated in a processor of the electronic device 100 .

In addition, in order to realize the isolation between the first polar plate 24 when transmitting the differential excitation current and the detected signal, or improve the isolation when transmitting two signals, the first polar plate 24 and the A filter circuit is provided between the sensor processing circuits 32 . The filter circuit can allow the signal detected by the capacitive sensor 31 to pass through, and prevent the differential excitation current from passing through.

Wherein, the conductor structure 23 , the conductive path on the ground plane 22 and the first plate 24 jointly form a conductive loop for the transmission of the differential excitation current. That is, the differential excitation current is output from a signal terminal of the NFC chip 21, for example, output from the first differential signal terminal 211, then fed into the conductor structure 23, and transmitted to the The conductive path on the ground plane 22 is then transmitted to the first plate 24 through the conductive path, and finally returns to the second differential signal terminal 212 of the NFC chip 21 through the first plate 24, Thus forming a complete current loop.

It can be understood that when the conductive loop transmits the differential excitation current, the conductive structure 23, the conductive path on the ground plane 22, and the first pole plate 24 can jointly generate an alternating electromagnetic field, thereby outward The NFC signal is radiated to realize the NFC communication of the electronic device 100 .

Wherein, when the conductive loop transmits the differential excitation current, the conductor structure 23 generates a first near-field communication radiation field (a first NFC radiation field). The first NFC radiation field may cover a certain spatial area around the electronic device 100 . The first polar plate 24 generates a second near-field communication radiation field (second NFC radiation field). The second NFC radiation field may also cover a certain spatial area around the electronic device 100 . Wherein, the second NFC radiation field at least partially overlaps with the first NFC radiation field, so that the area of the NFC radiation field around the electronic device 100 can be enhanced, and the field strength of the overlapping area can be enhanced. Therefore, the effective reading and writing (card swiping) area of the NFC antenna of the electronic device 100 can be increased, and the stability of the NFC antenna of the electronic device 100 when reading and writing (swiping a card) can be improved.

In addition, when the conductive loop transmits the differential excitation current, the ground plane 22 may generate a third near-field communication radiation field (a third NFC radiation field). The third NFC radiation field may also cover a certain spatial area around the electronic device 100 . Wherein, the third NFC radiation field at least partially overlaps with the first NFC radiation field, and the third NFC radiation field at least partially overlaps with the second NFC radiation field. Therefore, the area of the NFC radiation field around the electronic device 100 can be further enhanced, and the field strength of the overlapping area can be enhanced.

For example, in practical applications, when an NFC receiver (such as a subway card reader) reads an NFC signal near the position of the conductor structure 23, the first NFC radiation field formed by the conductor structure 23 is used as the main radiation field, so Both the second NFC radiation field formed by the first pole plate 24 and the third NFC radiation field formed by the ground plane 22 can compensate the main radiation field, so that the field strength of the main radiation field can be adjusted Weaker locations are compensated to enhance the field strength over the entire area of the main radiation field. Similarly, when the NFC receiver reads the NFC signal near the position of the first pole plate 24, the second NFC radiation field formed by the first pole plate 24 is used as the main radiation field, and the first NFC radiation field , the third NFC radiation field can compensate the main radiation field.

Therefore, in the electronic device 100 of the present application, it can be guaranteed that the NFC signal can be sent and received at any position of the NFC radiation field formed by the conductor structure 23, the first plate 24, and the ground plane 22, thereby Realize NFC communication between the electronic device 100 and other electronic devices.

Referring to FIG. 3 at the same time, FIG. 3 is a schematic diagram of the arrangement of the antenna device in the electronic device 100 provided by the embodiment of the present application.

Wherein, the near field communication chip (NFC chip) can be integrated on the circuit board of the electronic device, the conductor structure can be arranged on one end of the electronic device, for example, the conductor structure can be arranged on the top of the electronic device, and the ground plane can be formed on the electronic device. On the circuit board, the first polar plate can be arranged on one side of the electronic device, for example, the first polar plate can be arranged on the right side of the electronic device. Thus, the differential excitation current provided by the NFC chip can be transmitted from the NFC chip to the conductor structure at the top of the electronic device, then from the conductor structure to the ground plane on the circuit board of the electronic device, and then from the ground plane on the circuit board to the ground plane. The first polar plate on the right side of the electronic device is finally reflowed from the second conductor structure into the NFC chip.

It should be noted that the arrangement of the conductor structure on the top of the electronic device and the arrangement of the first plate on the right side of the electronic device is merely an example, rather than limiting the embodiment of the present application. It can be understood that the conductor structure can also be arranged on other parts of the electronic device, and the first electrode plate can also be arranged on other parts of the electronic device, so that different parts of the electronic device can communicate with other electronic devices. For example, NFC communication can be realized through the front of the electronic device (that is, the side where the display screen of the electronic device is located), and through the back of the electronic device (that is, the side where the battery cover of the electronic device is located) NFC communication is also possible.

It should be noted that when the electronic device radiates an NFC signal, the NFC chip in the electronic device can actively provide a differential excitation current. And when the electronic device receives NFC signals radiated by other electronic devices as an NFC receiver, an induced current may be generated in the electronic device, and the induced current can also be understood as the differential excitation current provided by the NFC chip, or understood The differential excitation current passively provided for the NFC chip. That is, whether the electronic device acts as an NFC transmitter to radiate NFC signals, or acts as an NFC receiver to receive NFC signals radiated by other electronic devices, the NFC chip in the electronic device can provide a differential excitation current.

In the electronic device provided in the embodiment of the present application, by setting the conductor structure and the first plate of the multiplexing capacitive sensor, and connecting the conductor structure and the first plate to two different ground points of the same ground plane, and The ground plane between the two ground points is used to form a conductive path, so that a conductive loop for NFC differential excitation current transmission can be formed through the conductor structure, the first plate and the conductive path. Since the conductor structure and the first plate can be arranged in different parts of the electronic device according to the requirements of the internal space design of the electronic device, and then connected to form a circuit through the conductive path formed on the ground plane, the electronic The conductor structure of different parts of the device and the capacitive sensor cooperate with the ground plane to realize the design of the NFC antenna, so the plate of the capacitive sensor can be reused as the NFC antenna, which not only saves the space occupied by the NFC antenna, but also makes the layout of the NFC antenna more flexible .

Referring to FIG. 4 , FIG. 4 is a schematic diagram of a third structure of an electronic device 100 provided in an embodiment of the present application. Wherein, the electronic device 100 shown in FIG. 4 is different from the electronic device 100 shown in FIG. 3 in that: the second plate 311 of the capacitive sensor 31 can be reused as the conductor structure 23 . That is, the conductor structure 23 includes the second plate 311 . The first feeding end 231 and the first grounding end 232 on the conductor structure 23 are arranged on the second pole plate 311 at intervals.

It can be understood that the differential excitation current provided by the NFC chip 21 may include a first current and a second current, and the phase of the first current is opposite to that of the second current. Wherein, the first differential signal terminal 211 of the NFC chip 21 is used to output the first current, and the second differential signal terminal 212 of the NFC chip 21 is used to output the second current.

It should be noted that since the first pole plate 24 and the second pole plate 311 jointly form the capacitive sensor 31, the distance between the first pole plate 24 and the second pole plate 311 is relatively small. Small. For example, the distance between the first pole plate 24 and the second pole plate 311 may be 3mm (millimeter). At this time, the NFC radiation field formed by the first pole plate 24 almost overlaps with the NFC radiation field formed by the second pole plate 311 . And when the phase between the current transmitted by the first pole plate 24 and the current transmitted by the second pole plate 311 is opposite, the NFC radiation field formed by the first pole plate 24 and the second pole plate 311 The directions of the formed NFC radiation fields are also opposite, and at this time, the two NFC radiation fields will weaken each other or even cancel each other out.

In order to make the NFC radiation field formed by the first pole plate 24 and the NFC radiation field formed by the second pole plate 311 strengthen each other, it is necessary to make the NFC radiation field formed by the first pole plate 24 and the second pole plate 311 mutually strengthen each other. The direction of the NFC radiation field formed by the board 311 is the same. Therefore, the phase of the current transmitted by the second pole plate 311 can be adjusted by a phase shifter, so that the phase of the current transmitted by the second pole plate 311 is the same as the phase of the current transmitted by the first pole plate 24 .

Wherein, the electronic device 100 includes a phase shifter 234 . The phase shifter 234 is both electrically connected to the first differential signal terminal 211 and the first feed terminal 231 . That is, the first feed terminal 231 is electrically connected to the first differential signal terminal 211 through the phase shifter 234 . The phase shifter 234 is used to adjust the phase of the first current output by the first differential signal terminal 211, so that the phase of the adjusted first current is the same as the second phase of the output of the second differential signal terminal 212. The phases of the currents are the same. Therefore, when the second pole plate 311 transmits the first current and the first pole plate 24 transmits the second current, the direction of the NFC radiation field formed by the second pole plate 311 is It can be in the same direction as the NFC radiation field formed by the first pole plate 24, so that the NFC radiation field formed by the second pole plate 311 and the NFC radiation field formed by the first pole plate 24 reinforce each other to improve The signal strength when the electronic device 100 radiates the NFC signal outward.

Referring to FIG. 5 , FIG. 5 is a schematic diagram of a fourth structure of an electronic device 100 provided in an embodiment of the present application. The difference between the electronic device 100 shown in FIG. 5 and the electronic device 100 shown in FIG. 3 is that the electronic device 100 includes a main circuit board 33 , a secondary circuit board 34 and a flexible circuit board (FPC) 35 . The main circuit board 33 and the auxiliary circuit board 34 may be arranged at different positions in the electronic device 100 at intervals. Wherein, the main circuit board 33 is electrically connected with the auxiliary circuit board 34 through the FPC 35, so as to realize the electrical connection between the main circuit board 33 and the auxiliary circuit board 34. The FPC 35 is provided with a metal wire 351, and the metal wire 351 can be reused as the conductor structure 23. That is, the conductor structure 23 includes the metal wire 351 . Wherein, the first feeding end 231 and the first grounding end 232 are disposed on the metal trace 351 at intervals.

Wherein, it can be understood that both the near field communication chip 21 and the ground plane 22 may be disposed on the main circuit board 33 .

Referring to FIG. 6 , FIG. 6 is a schematic diagram of a fifth structure of an electronic device 100 provided in an embodiment of the present application. Wherein, the antenna device of the electronic device 100 further includes a first non-near-field communication chip 25 and a second non-near-field communication chip 26 . It can be understood that both the first non-near-field communication chip 25 and the second non-near-field communication chip 26 can be integrated on the circuit board 30 of the electronic device 100 .

In the description of this application, it should be understood that terms such as "first" and "second" are only used to distinguish similar objects, and cannot be interpreted as indicating or implying relative importance or implicitly indicating the indicated technology number of features.

The first non-near-field communication chip 25 is used for providing a first non-near-field communication excitation signal. Wherein, the first non-NFC excitation signal is an unbalanced signal. The first non-near-field communication excitation signal may include one of a cellular network signal, a Wi-Fi signal, a GPS signal, and a BT signal. Correspondingly, the first non-near-field communication chip 25 may be a cellular communication chip for providing the cellular network signal; the first non-near-field communication chip 25 may be a Wi-Fi chip for providing the Wi-Fi signal; the first non-near-field communication chip 25 can be a GPS chip for providing the GPS signal; the first non-near-field communication chip 25 can also be a BT chip for providing the BT Signal.

The conductor structure 23 also includes a third feeding end 233 . The third feeding end 233 is spaced apart from the first feeding end 231 and the first grounding end 232 . The third feeding terminal 233 is electrically connected to the first non-near field communication chip 25, and the first non-near field communication chip 25 is grounded. Therefore, the first non-near-field communication chip 25 can feed the first non-near-field communication excitation signal to the conductor structure 23 through the third feeding terminal 233 . Therefore, the conductor structure 23 can also be used to transmit the first non-near-field communication excitation signal.

It can be understood that the conductor structure 23 can be used to transmit the differential excitation current provided by the NFC chip 21, and can also be used to transmit the first non-near field communication excitation signal provided by the first non-near field communication chip 25. , so that the multiplexing of the conductor structure 23 can be realized, and the number of conductor structures used to transmit wireless signals in the electronic device 100 can be reduced, thereby saving the internal space of the electronic device 100 .

Among them, it should be noted that the frequency of NFC signals is usually 13.56MHz (megahertz), the frequency of cellular network signals is usually above 700MHz, the frequency of Wi-Fi signals is usually 2.4GHz (gigahertz) or 5GHz, and the frequency of GPS signals The frequency usually includes multiple frequency bands such as 1.575GHz, 1.227GHz, 1.381GHz, 1.841GHz, etc., and the frequency of the BT signal is usually 2.4GHz. Therefore, compared to cellular network signals, Wi-Fi signals, GPS signals, and BT signals, NFC signals are low-frequency signals, while cellular network signals, Wi-Fi signals, GPS signals, and BT signals are all high-frequency signals. Or it can also be understood that the NFC signal is a low-frequency signal, the first non-near-field communication excitation signal is a high-frequency signal, and the frequency of the NFC signal is lower than the frequency of the first non-near-field communication excitation signal.

In addition, it should be noted that when transmitting a wireless signal, the lower the frequency of the wireless signal, the longer the required length of the radiator; and the higher the frequency of the wireless signal, the shorter the required length of the radiator. That is, the length of the radiator required for transmitting the NFC signal is greater than the length of the radiator required for transmitting the first non-near-field communication excitation signal.

Therefore, in the conductor structure 23 , the distance between the first feeding end 231 and the first grounding end 232 is greater than the distance between the third feeding end 233 and the first grounding end 232 . Therefore, in the conductor structure 23 , the length of the radiator transmitting the NFC signal is longer than the length of the radiator transmitting the first non-near-field communication excitation signal.

In addition, in order to reduce the overall length of the conductor structure 23 , it may be set that the third feeding end 233 and the first feeding end 231 are located on the same side of the first grounding end 232 . That is, the third feeding end 233 is located between the first feeding end 231 and the first grounding end 232 . Compared with the third feeding end 233 and the first feeding end 231 being located on different sides of the first grounding end 232, the third feeding end 233 and the first feeding end 231 located on the same side of the first ground terminal 232 can reuse the part between the third feed terminal 233 and the first ground terminal 232 , so that the overall length of the conductor structure 23 can be reduced.

The second non-near-field communication chip 26 is used for providing a second non-near-field communication excitation signal. Wherein, the second non-NFC excitation signal is an unbalanced signal. The second non-near-field communication excitation signal may include one of a cellular network signal, a wireless fidelity signal (Wi-Fi signal), a global positioning system signal (GPS signal), and a Bluetooth signal (BT signal). Correspondingly, the second non-near-field communication chip 26 may be a cellular communication chip for providing the cellular network signal; the second non-near-field communication chip 26 may be a Wi-Fi chip for providing the Wi-Fi signal; the second non-near-field communication chip 26 can be a GPS chip for providing the GPS signal; the second non-near-field communication chip 26 can also be a BT chip for providing the BT Signal.

Wherein, it should be noted that the second non-near-field communication excitation signal and the first non-near-field communication excitation signal may be signals of the same communication type, or may be signals of different communication types. Correspondingly, the second non-near-field communication chip 26 and the first non-near-field communication chip 25 may be of the same type, or may be of different types.

The first pole plate 24 also includes a fourth feeding end 243 . The fourth feeding end 243 is spaced apart from the second feeding end 241 and the second grounding end 242 . The fourth feeding terminal 243 is electrically connected to the second non-near field communication chip 26, and the second non-near field communication chip 26 is grounded. Therefore, the second non-near-field communication chip 26 can feed the second non-near-field communication excitation signal to the first plate 24 through the fourth feeding terminal 243 . Therefore, the first pole plate 24 can also be used to transmit the second non-NFC excitation signal.

It can be understood that the first plate 24 can be used to transmit the differential excitation current provided by the NFC chip 21, and can also be used to transmit the second non-near field communication provided by the second non-near field communication chip 26. The excitation signal can realize the multiplexing of the first plate 24 , which can further reduce the number of conductor structures used to transmit wireless signals in the electronic device 100 , thereby further saving the internal space of the electronic device 100 .

Similarly, in the first pole plate 24, the distance between the second feeding end 241 and the second grounding end 242 is greater than the distance between the fourth feeding end 243 and the second grounding end 242 . Therefore, in the first polar plate 24 , the length of the radiator transmitting the NFC signal is longer than the length of the radiator transmitting the second non-near-field communication excitation signal.

In addition, in order to reduce the overall length of the first pole plate 24 , it can be set that the fourth feeding end 243 and the second feeding end 241 are located on the same side of the second grounding end 242 . That is, the fourth feeding end 243 is located between the second feeding end 241 and the second grounding end 242 . Compared with the fourth feeding end 243 and the second feeding end 241 located on different sides of the second grounding end 242, the fourth feeding end 243 and the second feeding end 241 The part between the fourth feeding end 243 and the second grounding end 242 can be reused on the same side of the second grounding end 242 , so that the overall length of the first pole plate 24 can be reduced.

Referring to FIG. 7 , FIG. 7 is a schematic diagram of a sixth structure of an electronic device 100 provided in an embodiment of the present application. Wherein, the antenna device of the electronic device 100 further includes a first matching circuit 271, a second matching circuit 272, a third matching circuit 273, a first filtering circuit 281, a second filtering circuit 282, a third filtering circuit 283 and a fourth filter circuit 284 . It can be understood that a matching circuit may also be called a matching network, a tuning circuit, a tuning network, and the like. A filter circuit can also be called a filter network.

The first matching circuit 271 is connected to the first differential signal terminal 211 of the NFC chip 21, the second differential signal terminal 212 of the NFC chip 21, the first feeding terminal 231 of the conductor structure 23, the first The second feed end 241 of one pole plate 24 is electrically connected. The first matching circuit 271 is used to match the impedance of the conductive loop when transmitting the differential excitation current.

Wherein, the first matching circuit 271 includes a first input terminal 271a, a second input terminal 271b, a first output terminal 271c, and a second output terminal 271d. The first input terminal 271a is electrically connected to the first differential signal terminal 211 of the NFC chip 21, the second input terminal 271b is electrically connected to the second differential signal terminal 212 of the NFC chip 21, and the first The output end 271c is electrically connected to the first feed end 231 of the conductor structure 23 , and the second output end 271d is electrically connected to the second feed end 241 of the first plate 24 .

The first filter circuit 281 is disposed between the first differential signal terminal 211 of the NFC chip 21 and the first input terminal 271 a of the first matching circuit 271 . The first filter circuit 281 is used to filter out a first interference signal between the first differential signal terminal 211 and the first input terminal 271a. The first interference signal is an electrical signal other than the differential excitation current provided by the NFC chip 21 .

The second filtering circuit 282 is disposed between the second differential signal terminal 212 of the NFC chip 21 and the second input terminal 271b of the first matching circuit 271 . The second filter circuit 282 is used to filter out the second interference signal between the second differential signal terminal 212 and the second input terminal 271b. The second interference signal is an electrical signal other than the differential excitation current provided by the NFC chip 21 .

The second matching circuit 272 is electrically connected to the first non-NFC chip 25 and the third feeding end 233 of the conductor structure 23 . The second matching circuit 272 is used to match the impedance of the conductor structure 23 when transmitting the first non-NFC excitation signal.

The third filter circuit 283 is disposed between the first non-NFC chip 25 and the second matching circuit 272 . The third filter circuit 283 is used to filter out a third interference signal between the first non-NFC chip 25 and the second matching circuit 272 . The third interference signal is an electrical signal other than the first non-near-field communication excitation signal provided by the first non-near-field communication chip 25 .

The third matching circuit 273 is electrically connected to the second non-NFC chip 26 and the fourth feeding end 243 of the first plate 24 . The third matching circuit 273 is used to match the impedance of the first plate 24 when transmitting the second non-NFC excitation signal.

The fourth filter circuit 284 is disposed between the second non-NFC chip 26 and the third matching circuit 273 . The fourth filter circuit 284 is used to filter out a fourth interference signal between the second non-NFC chip 26 and the third matching circuit 273 . The fourth interference signal is an electrical signal other than the second non-near-field communication excitation signal provided by the second non-near-field communication chip 26 .

Wherein, it can be understood that the first matching circuit 271 , the second matching circuit 272 and the third matching circuit 273 may all include circuits composed of capacitors and inductors in any series or in parallel. The first filter circuit 281 , the second filter circuit 282 , the third filter circuit 283 , and the fourth filter circuit 284 may also include circuits composed of any series connection or parallel connection of capacitors and inductors.

Referring to FIG. 8 , FIG. 8 is a schematic diagram of a seventh structure of an electronic device 100 provided in an embodiment of the present application.

The first matching circuit 271 may include, for example, four capacitors C1, C2, C3, and C4. Wherein, the capacitor C1 is connected in series with the first differential signal terminal 211 of the NFC chip 21 , and the capacitor C2 is connected in series with the second differential signal terminal 212 of the NFC chip 21 . The capacitor C3 is connected in series with the capacitor C4, and after being connected in parallel with the NFC chip 21, and the capacitor C3 and the capacitor C4 are grounded. It can be understood that the capacitance values of the capacitors C1, C2, C3, and C4 can be set according to actual needs.

The first filter circuit 281 may include, for example, an inductor L1 and a capacitor C5. Wherein, the inductor L1 is connected in series between the first differential signal terminal 211 and the first matching circuit 271 , and the capacitor C5 is connected in parallel with the NFC chip 21 and grounded. It can be understood that the inductance value of the inductor L1 and the capacitance value of the capacitor C5 can be set according to actual needs.

The second filtering circuit 282 may include, for example, an inductor L2 and a capacitor C6. Wherein, the inductor L2 is connected in series between the second differential signal terminal 212 and the first matching circuit 271 , and the capacitor C6 is connected in parallel with the NFC chip 21 and grounded. It can be understood that the inductance value of the inductor L2 and the capacitance value of the capacitor C6 can be set according to actual needs.

The second matching circuit 272 may include, for example, capacitors C7 and C8. Wherein, the capacitor C7 is connected in series between the third feeding end 233 of the conductor structure 23 and the first non-near-field communication chip 25 , and the capacitor C8 is connected in parallel with the first non-near-field communication chip 25 and grounded. It can be understood that the capacitance values of the capacitors C7 and C8 can be set according to actual needs.

The third filtering circuit 283 may include, for example, an inductor L3 and a capacitor C9. Wherein, the inductor L3 is connected in series between the first non-near-field communication chip 25 and the second matching circuit 272 , and the capacitor C9 is connected in parallel with the first non-near-field communication chip 25 and grounded. It can be understood that the inductance value of the inductor L3 and the capacitance value of the capacitor C9 can be set according to actual needs.

The third matching circuit 273 may include, for example, capacitors C10 and C11. Wherein, the capacitor C10 is connected in series between the fourth feeding end 243 of the first plate 24 and the second non-near field communication chip 26 , and the capacitor C11 is connected in parallel with the second non-near field communication chip 26 and grounded. It can be understood that the capacitance values of the capacitors C10 and C11 can be set according to actual needs.

The fourth filtering circuit 284 may include, for example, an inductor L4 and a capacitor C12. Wherein, the inductor L4 is connected in series between the second non-near-field communication chip 26 and the third matching circuit 273 , and the capacitor C12 is connected in parallel with the second non-near-field communication chip 26 and grounded. It can be understood that the inductance value of the inductor L4 and the capacitance value of the capacitor C12 can be set according to actual needs.

The electronic device provided by the embodiments of the present application has been introduced in detail above. In this paper, specific examples are used to illustrate the principles and implementation methods of the present application, and the descriptions of the above embodiments are only used to help understand the present application. At the same time, for those skilled in the art, based on the idea of this application, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be construed as limiting the application.

Claims (15)

1. An electronic device, characterized in that, comprising: A near-field communication chip, including a first differential signal terminal and a second differential signal terminal, the first differential signal terminal and the second differential signal terminal are used to provide a differential excitation current; A first non-near-field communication chip, configured to provide a first non-near-field communication excitation signal; a ground plane, including a first ground point and a second ground point arranged at intervals, and the ground plane forms a conductive path between the first ground point and the second ground point; The conductor structure includes a first feeding end, a third feeding end and a first grounding end arranged at intervals, the first feeding end is electrically connected to the first differential signal end, and the third feeding end is connected to the The first non-near-field communication chip is electrically connected, and the first ground terminal is electrically connected to the first ground point; A capacitive sensor, used to detect the distance of an external conductor, the capacitive sensor includes a first pole plate and a second pole plate, the second pole plate is spaced apart from the first pole plate, and the first pole plate includes a spacer A second feeding terminal and a second grounding terminal are provided, the second feeding terminal is electrically connected to the second differential signal terminal, the second grounding terminal is electrically connected to the second grounding point, and the conductor The structure includes the second pole plate, the first feeding terminal and the first grounding terminal are arranged on the second pole plate at intervals; Wherein, the conductor structure, the conduction path and the first pole plate jointly form a conduction loop for the transmission of the differential excitation current, and when the conduction loop transmits the differential excitation current, the conductor structure generates a second A near-field communication radiation field, the first polar plate generates a second near-field communication radiation field, the second near-field communication radiation field at least partially overlaps with the first near-field communication radiation field, and the conductor structure further It is used for transmitting the first non-near-field communication excitation signal. 2. The electronic device according to claim 1, characterized in that: The differential excitation current includes a first current and a second current, the phase of the first current is opposite to that of the second current, the first differential signal terminal is used to output the first current, and the first Two differential signal terminals are used to output the second current; The electronic device further includes a phase shifter, the first feeding terminal is electrically connected to the first differential signal terminal through the phase shifter, and the phase shifter is used to adjust the phase of the first current , so that the adjusted phase of the first current is the same as the phase of the second current. 3. The electronic device according to claim 1, further comprising a main circuit board, an auxiliary circuit board and a flexible circuit board, the main circuit board is electrically connected to the auxiliary circuit board through the flexible circuit board, Metal traces are arranged on the flexible circuit board, the conductor structure includes the metal traces, and the first feed end and the first ground end are arranged on the metal traces at intervals. 4. The electronic device according to claim 3, wherein the near field communication chip and the ground plane are both arranged on the main circuit board. 5. The electronic device according to claim 1, wherein the ground plane generates a third near-field communication radiation field, and the third near-field communication radiation field is at least partly the same as the first near-field communication radiation field overlapping, and the third near-field communication radiation field at least partially overlaps with the second near-field communication radiation field. 6. The electronic device according to any one of claims 1 to 5, wherein the third feeding terminal and the first feeding terminal are located on the same side of the first grounding terminal, and the first The distance between the feeding end and the first grounding end is greater than the distance between the third feeding end and the first grounding end. 7. The electronic device according to any one of claims 1 to 5, further comprising: A second non-near-field communication chip, configured to provide a second non-near-field communication excitation signal; The first pole plate also includes a fourth feed end, the fourth feed end is electrically connected to the second non-near-field communication chip, and the first pole plate is also used to transmit the second non-near-field communication chip. Field communication excitation signal. 8. The electronic device according to claim 7, wherein the fourth feeding terminal and the second feeding terminal are located on the same side of the second grounding terminal, and the second feeding terminal and the second feeding terminal are located on the same side of the second grounding terminal. The distance between the second ground terminal is greater than the distance between the fourth feed terminal and the second ground terminal. 9. The electronic device according to any one of claims 1 to 5, further comprising a first matching circuit, the first matching circuit is connected to the first differential signal terminal and the second differential signal terminal . The first feed end and the second feed end are electrically connected, and the first matching circuit is used to match the impedance of the conductive loop when transmitting the differential excitation current. 10. The electronic device according to claim 9, characterized in that: The first matching circuit includes a first input terminal, a second input terminal, a first output terminal, and a second output terminal; The first input terminal is electrically connected to the first differential signal terminal, the second input terminal is electrically connected to the second differential signal terminal, and the first output terminal is electrically connected to the first feed terminal , the second output end is electrically connected to the second feed end. 11. The electronic device according to claim 10, further comprising: a first filter circuit, arranged between the first differential signal terminal and the first input terminal; The second filtering circuit is arranged between the second differential signal terminal and the second input terminal. 12. The electronic device according to any one of claims 1 to 5, further comprising a second matching circuit, the second matching circuit is connected to the first non-near-field communication chip, the third feeder The electrical terminals are electrically connected, and the second matching circuit is used to match the impedance of the conductor structure when transmitting the first non-near-field communication excitation signal. 13. The electronic device according to claim 12, further comprising a third filter circuit disposed between the first non-near-field communication chip and the second matching circuit. 14. The electronic device according to claim 7, further comprising a third matching circuit, the third matching circuit is electrically connected to the second non-near-field communication chip and the fourth feeding terminal, The third matching circuit is used to match the impedance of the first plate when transmitting the second non-near-field communication excitation signal. 15. The electronic device according to claim 14, further comprising a fourth filter circuit disposed between the second non-near-field communication chip and the third matching circuit.

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