CN219833028U - NFC antenna, NFC device and intelligent terminal - Google Patents

Abstract

The application provides an NFC antenna, an NFC device and an intelligent terminal, which comprise at least two radiators, wherein one ends of the at least two radiators are connected with a grounding point, the other ends of the at least two radiators are respectively connected with a feed point, and the at least two feed points are connected with a switch. According to the application, the space occupied by the NFC antenna on the main board bracket of the intelligent terminal can be reduced, the space utilization rate of the whole machine is improved, and the user experience is improved.

Description

NFC antenna, NFC device and intelligent terminal

Technical Field

The application relates to the technical field of intelligent terminals, in particular to an NFC antenna, an NFC device and an intelligent terminal.

Background

Near field communication (Near F ie l d Commun i cat i on, NFC for short), is a wireless communication technology that enables devices to communicate with each other without using the internet. NFC functionality is typically achieved by a differential structure, i.e. the antenna is provided with two pins, each pin being connected by a circuit to a set of receivers and transmitters, respectively, which are connected to the chip.

In the process of designing and implementing the present application, the inventors found that at least the following problems exist in the related art: some schemes for realizing NFC functions through a differential structure can occupy more motherboard bracket space of the intelligent terminal.

The foregoing description is provided for general background information and does not necessarily constitute prior art.

Disclosure of Invention

Aiming at the technical problems, the NFC antenna, the NFC device and the intelligent terminal provided by the utility model can reduce the space of a main board bracket of the intelligent terminal and improve the user experience.

The utility model provides an NFC antenna, which comprises at least one antenna component, wherein the antenna component comprises at least one of a conductive frame, a main board, a rotating shaft, a wire and a radiator; the antenna component is L-shaped or in-line structure.

Optionally, the antenna component comprises a radiator, and a conductive bezel or motherboard; one end of the radiator is connected with the feed point, the other end of the radiator is connected with one end of the conductive frame or the main board in series, and the other end of the conductive frame or the main board is connected with the grounding point.

Optionally, the antenna component comprises a first radiator, a second radiator and a third radiator, the first radiator is arranged on the rotating shaft of the folding screen terminal, the second radiator and the third radiator are respectively arranged on two sides of the rotating shaft, and the second radiator and the third radiator are close to the rotating shaft and the frame of the folding screen terminal; one end of the first radiator is connected with the feed point, the other end of the first radiator is connected with one ends of the second radiator and the third radiator, and the other ends of the second radiator and the third radiator are connected with the grounding point.

Optionally, the antenna component comprises a main board and a wire, one end of the wire is connected with one end of the main board, the other end of the wire is connected with the feed point, and the other end of the main board is connected with the grounding point; alternatively, the antenna component includes a main board and at least two wires, any two adjacent wires of the wires being connected in series with the main board.

Optionally, the antenna component includes a radiator, and a conductive frame or a rotating shaft, where the radiator includes at least two radiating portions, and any two adjacent radiating portions in the radiating portions are connected in series with the conductive frame or the rotating shaft; one end of the antenna component is connected with the feed point, and the other end is connected with the grounding point.

The application also provides an NFC antenna, which comprises at least two radiators, wherein one ends of the at least two radiators are connected with a grounding point, the other ends of the at least two radiators are respectively connected with a feed point, and the at least two feed points are connected with a switch.

Optionally, at least two radiators are disposed on two sides of the rotating shaft, and a distance between the at least two radiators is a preset distance.

Optionally, the spacing between the at least two radiators is greater than or equal to 10mm.

The application also provides an NFC device, which comprises the NFC antenna and a circuit module; one end of the NFC antenna is connected with the circuit module, and the other end of the NFC antenna is grounded.

Optionally, the circuit module comprises a matching circuit, a filter circuit and a switch, the NFC antenna and the matching circuit comprise at least two, and the NFC antenna is connected with the matching circuit; one end of the switch is connected with the filter circuit, and the other end of the switch is connected with at least two matching circuits.

The application further provides an intelligent terminal comprising the NFC antenna and/or the NFC device.

As described above, the NFC antenna, the NFC device and the intelligent terminal can reduce the space of the main board bracket of the intelligent terminal occupied by the NFC antenna by changing the structure of the NFC antenna and the position of the NFC antenna arranged on the intelligent terminal, improve the space utilization rate of the whole machine, avoid the interference of the NFC module and other modules in space and improve the user experience.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application. In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.

Fig. 1 is a schematic diagram of a hardware structure of a mobile terminal implementing various embodiments of the present application;

fig. 2 is a schematic structural diagram of an NFC antenna according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of another NFC antenna according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of another NFC antenna according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of another NFC antenna according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of another NFC antenna according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of another NFC antenna according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of another NFC antenna according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of another NFC antenna according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of an NFC device according to an embodiment of the present application;

fig. 11 is a schematic circuit connection diagram of an NFC device according to an embodiment of the present application;

fig. 12 is a schematic circuit diagram of another NFC device according to an embodiment of the present application.

Reference numerals illustrate:

100: a mobile terminal; 101: an RF unit; 102: wi F i module; 103: an audio output unit; 104: an A/V input unit; 1041: a graphics processor; 1042: a microphone; 105: a sensor; 106: a display unit; 1061: a display panel; 107: a user input unit; 1071: a touch panel; 1072: other input devices; 108: an interface unit; 109: a memory; 110: a processor; 111: a power supply;

201: a radiator; 202: a conductive bezel; 203: a feeding point; 204: a grounding point;

301: a radiator; 302: a main board; 303: a feeding point; 304: a grounding point;

401: a first radiator; 402: a second radiator; 403: a third radiator; 404: a rotating shaft; 405: a feeding point; 406: a grounding point; 407: a grounding point;

501: a conductive bezel; 502: a first radiation portion; 503: a second radiation portion; 504: a feeding point; 505: a grounding point; 506: a grounding point;

601: a radiator; 602: a feeding point; 603: a grounding point;

701: a rotating shaft; 702: a first radiation portion; 703: a second radiation portion; 704: a feeding point; 705: a grounding point;

801: a first radiator; 802: a second radiator; 803: a grounding point; 804: a feeding point; 805: a feeding point; 806: a switch; 807: a chip;

901: a first radiator; 902: a second radiator; 903: a switch; 904: a grounding point; 905: a rotating shaft; 906: a feeding point; 907: a feeding point;

1001: an NFC antenna; 1002: a matching circuit; 1003: an impedance converter; 1004: a filter circuit; 1005: a transceiver; 1006: a chip; 1007: and (3) a switch.

The achievement of the objects, functional features and advantages of the present application will be further described with reference to the accompanying drawings, in conjunction with the embodiments. Specific embodiments of the present application have been shown by way of the above drawings and will be described in more detail below. The drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but rather to illustrate the inventive concepts to those skilled in the art by reference to the specific embodiments.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the application. Rather, they are merely examples of apparatus consistent with aspects of the application as detailed in the accompanying claims.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the element defined by the phrase "comprising one … …" does not exclude the presence of additional identical elements in a process, method, article, or apparatus that comprises the element, and alternatively, elements having the same name in different embodiments of the application may have the same meaning or may have different meanings, a particular meaning of which is to be determined by its interpretation in this particular embodiment or further in connection with the context of this particular embodiment.

It should be understood that although the terms first, second, third, etc. may be used herein to describe various information, these information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope herein. The word "if" as used herein may be interpreted as "at … …" or "at … …" or "responsive to a determination", depending on the context. Furthermore, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes," and/or "including" specify the presence of stated features, steps, operations, elements, components, items, categories, and/or groups, but do not preclude the presence, presence or addition of one or more other features, steps, operations, elements, components, items, categories, and/or groups. The terms "or", "and/or", "including at least one of", and the like, as used herein, may be construed as inclusive, or mean any one or any combination. For example, "including at least one of: A. b, C "means" any one of the following: a, A is as follows; b, a step of preparing a composite material; c, performing operation; a and B; a and C; b and C; a and B and C ", again as examples," A, B or C "or" A, B and/or C "means" any of the following: a, A is as follows; b, a step of preparing a composite material; c, performing operation; a and B; a and C; b and C; a and B and C). An exception to this definition will occur only when a combination of elements, functions, steps or operations are in some way inherently mutually exclusive.

The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrase "if determined" or "if detected (stated condition or event)" may be interpreted as "when determined" or "in response to determination" or "when detected (stated condition or event)" or "in response to detection (stated condition or event), depending on the context.

It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

In the following description, suffixes such as "module", "part" or "unit" for representing elements are used only for facilitating the description of the present application, and have no specific meaning per se. Thus, "module," "component," or "unit" may be used in combination.

The intelligent terminal may be implemented in various forms. For example, the smart terminals described in the present application may include smart terminals such as mobile phones, tablet computers, notebook computers, palm computers, personal digital assistants (Persona l Digita lAss i stant, PDA), portable media players (Portab l e Med ia P l ayer, PMP), navigation devices, wearable devices, smart bracelets, pedometers, and stationary terminals such as digital TVs, desktop computers, and the like.

The following description will be given taking a mobile terminal as an example, and those skilled in the art will understand that the configuration according to the embodiment of the present application can be applied to a fixed type terminal in addition to elements particularly used for a moving purpose.

Referring to fig. 1, which is a schematic diagram of a hardware structure of a mobile terminal implementing various embodiments of the present application, the mobile terminal 100 may include: RF (radio Frequency) unit 101, wiFi module 102, audio output unit 103, a/V (audio/video) input unit 104, sensor 105, display unit 106, user input unit 107, interface unit 108, memory 109, processor 110, and power source 111. Those skilled in the art will appreciate that the mobile terminal structure shown in fig. 1 is not limiting of the mobile terminal and that the mobile terminal may include more or fewer components than shown, or may combine certain components, or a different arrangement of components.

The following describes the components of the mobile terminal in detail with reference to fig. 1:

the radio frequency unit 101 may be used for receiving and transmitting signals during the information receiving or communication process, specifically, after receiving downlink information of the base station, processing the downlink information by the processor 110; and, the uplink data is transmitted to the base station. Typically, the radio frequency unit 101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. Optionally, the radio frequency unit 101 may also communicate with networks and other devices via wireless communication. The wireless communication may use any communication standard or protocol including, but not limited to, GSM (G l oba l System of Mobi l e commun i cat ion, global system for mobile communications), GPRS (Genera l Packet Rad io Serv ice ), CDMA2000 (Code Di v i s ion Mu l t ip l e Access, 2000, CDMA 2000), WCDMA (Wideband Code Di v i s ion Mu lt ip l e Access ), TD-SCDMA (Time Di v i s ion-Synchronous Code Di vi s ion Mu lt ip l e Access, time division synchronous code division multiple access), FDD-LTE (Frequency D i vi s i on Dup l exi ng-Long Term Evo l ut ion, frequency division duplex long term evolution), TDD-LTE (Time Di vi s ion Dup l exi ng-Long Term Evo l ut ion, time division duplex long term evolution), and 5G, among others.

Wi F i belongs to a short-distance wireless transmission technology, and the mobile terminal can help a user to send and receive e-mails, browse web pages, access streaming media and the like through the Wi F i module 102, so that wireless broadband internet access is provided for the user. Although fig. 1 shows a WiFi module 102, it is understood that it does not belong to the necessary constitution of a mobile terminal, and can be omitted entirely as required within the scope of not changing the essence of the present application.

The audio output unit 103 may convert audio data received by the radio frequency unit 101 or the WiFi module 102 or stored in the memory 109 into an audio signal and output as sound when the mobile terminal 100 is in a call signal reception mode, a talk mode, a recording mode, a voice recognition mode, a broadcast reception mode, or the like. Also, the audio output unit 103 may also provide audio output (e.g., a call signal reception sound, a message reception sound, etc.) related to a specific function performed by the mobile terminal 100. The audio output unit 103 may include a speaker, a buzzer, and the like.

The a/V input unit 104 is used to receive an audio or video signal. The a/V input unit 104 may include a graphics processor (Graph ics Process i ng Un it, GPU) 1041 and a microphone 1042, the graphics processor 1041 processing image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 106. The image frames processed by the graphics processor 1041 may be stored in the memory 109 (or other storage medium) or transmitted via the radio frequency unit 101 or the WiFi module 102. The microphone 1042 can receive sound (audio data) via the microphone 1042 in a phone call mode, a recording mode, a voice recognition mode, and the like, and can process such sound into audio data. The processed audio (voice) data may be converted into a format output that can be transmitted to the mobile communication base station via the radio frequency unit 101 in the case of a telephone call mode. The microphone 1042 may implement various types of noise cancellation (or suppression) algorithms to cancel (or suppress) noise or interference generated in the course of receiving and transmitting the audio signal.

The mobile terminal 100 also includes at least one sensor 105, such as a light sensor, a motion sensor, and other sensors. Optionally, the light sensor includes an ambient light sensor and a proximity sensor, optionally, the ambient light sensor may adjust the brightness of the display panel 1061 according to the brightness of ambient light, and the proximity sensor may turn off the display panel 1061 and/or the backlight when the mobile terminal 100 moves to the ear. As one of the motion sensors, the accelerometer sensor can detect the acceleration in all directions (generally three axes), and can detect the gravity and direction when stationary, and can be used for applications of recognizing the gesture of a mobile phone (such as horizontal and vertical screen switching, related games, magnetometer gesture calibration), vibration recognition related functions (such as pedometer and knocking), and the like; as for other sensors such as fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc. that may also be configured in the mobile phone, the detailed description thereof will be omitted.

The display unit 106 is used to display information input by a user or information provided to the user. The display unit 106 may include a display panel 1061, and the display panel 1061 may be configured in the form of a liquid crystal display (Liqu i d Crysta l Di sp l ay, LCD), an organic Light-emitting Diode (OLED), or the like.

The user input unit 107 may be used to receive input numeric or character information and to generate key signal inputs related to user settings and function control of the mobile terminal. Alternatively, the user input unit 107 may include a touch panel 1071 and other input devices 1072. The touch panel 1071, also referred to as a touch screen, may collect touch operations thereon or thereabout by a user (e.g., operations of the user on the touch panel 1071 or thereabout by using any suitable object or accessory such as a finger, a stylus, etc.) and drive the corresponding connection device according to a predetermined program. The touch panel 1071 may include two parts of a touch detection device and a touch controller. Optionally, the touch detection device detects the touch azimuth of the user, detects a signal brought by touch operation, and transmits the signal to the touch controller; the touch controller receives touch information from the touch detection device, converts it into touch point coordinates, and sends the touch point coordinates to the processor 110, and can receive and execute commands sent from the processor 110. Alternatively, the touch panel 1071 may be implemented in various types of resistive, capacitive, infrared, surface acoustic wave, and the like. The user input unit 107 may include other input devices 1072 in addition to the touch panel 1071. Alternatively, other input devices 1072 may include, but are not limited to, one or more of a physical keyboard, function keys (e.g., volume control keys, first switch keys, etc.), a trackball, mouse, joystick, etc., as is not limited in detail herein.

Alternatively, the touch panel 1071 may overlay the display panel 1061, and when the touch panel 1071 detects a touch operation thereon or thereabout, the touch panel 1071 is transferred to the processor 110 to determine the type of touch event, and the processor 110 then provides a corresponding visual output on the display panel 1061 according to the type of touch event. Although in fig. 1, the touch panel 1071 and the display panel 1061 are two independent components for implementing the input and output functions of the mobile terminal, in some embodiments, the touch panel 1071 may be integrated with the display panel 1061 to implement the input and output functions of the mobile terminal, which is not limited herein.

The interface unit 108 serves as an interface through which at least one external device can be connected with the mobile terminal 100. For example, the external devices may include a wired or wireless headset port, an external power (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 108 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the mobile terminal 100 or may be used to transmit data between the mobile terminal 100 and an external device.

Memory 109 may be used to store software programs as well as various data. The memory 109 may mainly include a storage program area and a storage data area, and alternatively, the storage program area may store an operating system, an application program required for at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, phonebook, etc.) created according to the use of the handset, etc. Alternatively, the memory 109 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage device.

The processor 110 is a control center of the mobile terminal, connects various parts of the entire mobile terminal using various interfaces and lines, and performs various functions of the mobile terminal and processes data by running or executing software programs and/or modules stored in the memory 109 and calling data stored in the memory 109, thereby performing overall monitoring of the mobile terminal. Processor 110 may include one or more processing units; preferably, the processor 110 may integrate an application processor and a modem processor, the application processor optionally handling mainly an operating system, a user interface, an application program, etc., the modem processor handling mainly wireless communication. It will be appreciated that the modem processor described above may not be integrated into the processor 110.

The mobile terminal 100 may further include a power source 111 (e.g., a battery) for supplying power to the respective components, and preferably, the power source 111 may be logically connected to the processor 110 through a power management system, so as to perform functions of managing charging, discharging, and power consumption management through the power management system.

Although not shown in fig. 1, the mobile terminal 100 may further include a bluetooth module or the like, which is not described herein.

Based on the above-mentioned mobile terminal hardware structure, various embodiments of the present application are presented.

First embodiment

The embodiment of the application provides an NFC antenna, which comprises at least one antenna component, wherein the antenna component comprises at least one of a conductive frame, a main board, a rotating shaft, a wire and a radiator; the antenna component is L-shaped or in-line structure.

Alternatively, the NFC antenna may be applied to a folding screen terminal. The conductive frame may include a conductive frame of the folding screen terminal, the main board may include a main board i layout of the folding screen terminal, and the rotating shaft may include a rotating shaft on the folding screen terminal, to which the folding portion is connected. Alternatively, the radiator may comprise a flexible circuit board (F l exib l e Pr i nted Ci rcu it, abbreviated as FPC) whose surface is entirely covered with a nonmetallic magnetic material.

Alternatively, the flexible printed circuit board is a flexible printed circuit board which is made of polyimide or polyester film as a base material and has high reliability, excellent flexibility, high wiring density, light weight, thin thickness and good flexibility. Therefore, the FPC may be employed as a main body of the radiator. Optionally, the surface of the FPC is also completely covered with a non-metal magnetic material, optionally, ferrite, the non-metal magnetic material may guide the magnetic field to increase the magnetic flux, and the non-metal magnetic material is completely covered on the surface of the FPC, which may increase the performance of the radiator. Alternatively, the width of the radiator may be set to 2 to 5 millimeters (mm), alternatively, the width of the radiator may be set to 2mm, 3mm, 5mm, or the like.

Optionally, through at least one in electrically conductive frame, mainboard, pivot, wire, the radiator, can constitute L type structure or a style of calligraphy structure with the NFC antenna to can reduce the intelligent terminal's that the NFC antenna occupy mainboard space in the at utmost, promote complete machine space utilization, avoid NFC module and other modules interference in space, promoted user experience. Optionally, the NFC antenna may include any reasonable structure such as a C-type structure or a U-type structure, in addition to an L-type structure or a linear structure.

In an alternative embodiment of the application, the antenna component comprises a radiator, and a conductive bezel or motherboard; one end of the radiator is connected with the feed point, the other end of the radiator is connected with one end of the conductive frame or the main board in series, and the other end of the conductive frame or the main board is connected with the grounding point.

Optionally, the NFC antenna in this embodiment may include a radiator and a conductive bezel, or may include a radiator and a motherboard. Through the series connection of radiator and electrically conductive frame, perhaps the series connection of radiator and mainboard, can make NFC antenna constitute L type structure to can reduce the intelligent terminal's that NFC antenna occupy mainboard space in the at utmost, promote complete machine space utilization, avoid NFC module and other modules interference in space, promoted user experience.

As shown in fig. 2 and 3, in the optional folding screen terminal, since the main board changes greatly after folding, the performance also changes, and the folding and opening states need to be compatible, the structure of the NFC antenna may be different from that in the transverse folding screen terminal, as shown in fig. 2. Fig. 2 is a schematic structural diagram of an NFC antenna according to an embodiment of the present application, where in fig. 2, the NFC antenna may be disposed on a folding screen terminal, and the NFC antenna includes a radiator 201 and a conductive frame 202. The vertical folding screen terminal comprises a conductive frame 202, one end of a radiator 201 is connected with a feed point 203, the other end of the radiator is connected with one end of the conductive frame 202, the other end of the conductive frame 202 is connected with a grounding point 204, and the ground point 204 is grounded to form a loop. In fig. 2, a radiator 201 and a conductive frame 202 form an NFC antenna with an L-shaped structure, so as to realize an NFC function.

Fig. 3 is a schematic structural diagram of another NFC antenna according to an embodiment of the present application, where in fig. 3, the NFC antenna may be disposed on a folding screen terminal, and the NFC antenna includes a radiator 301 and a main board 302, where one end of the radiator 301 is connected to a feeding point 303, the other end of the radiator 301 is connected to one end of the main board 302, and the other end of the main board 302 is connected to a grounding point 304. In fig. 3, the radiator 301 and the main board 302 may be connected by the spring leg, so as to form an NFC antenna with an L-shaped structure, so that after the loop current passes through the radiator 301, the spring leg and the main board 302, the radiating area of the NFC antenna may be increased, and the performance of the NFC antenna may be unchanged under the condition that the radiator is reduced.

Optionally, the NFC antenna may also be applied to a non-folding screen terminal, and by applying the NFC antenna to different devices, the NFC functions of multiple devices may be implemented, thereby expanding the application range of the NFC antenna.

In an alternative embodiment of the application, the antenna component comprises a first radiator, a second radiator and a third radiator, wherein the first radiator is arranged on the rotating shaft of the folding screen terminal, the second radiator and the third radiator are respectively arranged at two sides of the rotating shaft, and the second radiator and the third radiator are close to the rotating shaft and the frame of the folding screen terminal; one end of the first radiator is connected with the feed point, the other end of the first radiator is connected with one ends of the second radiator and the third radiator, and the other ends of the second radiator and the third radiator are connected with the grounding point.

Optionally, the folding screen terminal may include a vertical folding screen terminal, and may also include a horizontal folding screen terminal, where the antenna component may include a first radiator, a second radiator, and a third radiator, as shown in fig. 4, fig. 4 is a schematic structural diagram of another NFC antenna provided in the embodiment of the present application, and taking the vertical folding screen terminal as an example, the first radiator 401 may be disposed on the rotating shaft 404, and the second radiator 402 and the third radiator 403 are disposed on two sides of the rotating shaft 404 near the frame. In fig. 4, one end of a first radiator 401 is connected to a feed point 405, the other end is connected to one end of a second radiator 402 and one end of a third radiator 403, the other end of the second radiator 402 is connected to a ground point 406, and the other end of the third radiator 403 is connected to a ground point 407.

Optionally, the radiators on two sides of the rotating shaft may be selected, that is, the first radiator and the second radiator are selected, or the first radiator and the third radiator are selected, so that an NFC function is realized, and performance of the NFC antenna is ensured to the greatest extent.

Alternatively, the application range of the NFC antenna can be enlarged by the structure of different radiators.

In an alternative embodiment of the application, the antenna component comprises a main board and a wire, one end of the wire is connected with one end of the main board, the other end of the wire is connected with the feed point, and the other end of the main board is connected with the grounding point; alternatively, the antenna component includes a main board and at least two wires, any two adjacent wires of the wires being connected in series with the main board.

Alternatively, the radiator may be replaced with a wire, so that the NFC antenna is formed by connecting the wires through the motherboard. There may be two cases, one is that one end of a straight-line main board is connected with one end of a wire, the other end of the wire is connected with a feeding point, and the other end of the main board is grounded, so that a straight-line NFC antenna is formed; the other is that the two ends of the linear main board are connected with the wires, so that a linear NFC antenna is formed, one end of the linear NFC antenna is connected with the feed point, and the other end of the linear NFC antenna is connected with the grounding point. Different NFC antenna structures can expand the application range of NFC antennas.

Alternatively, the main board does not need to be provided with a non-metal magnetic material, and the wire can be provided with the non-metal magnetic material.

In an alternative embodiment of the application, the antenna component comprises a radiator and a conductive frame or shaft, the radiator comprising at least two radiating portions, any two adjacent radiating portions of the radiating portions being in series with the conductive frame or shaft; one end of the antenna component is connected with the feed point, and the other end is connected with the grounding point.

Alternatively, the radiator may comprise at least two radiating portions, the at least two radiating portions being connected in series.

Alternatively, a conductive bezel or shaft may be connected in series between any two adjoining ones of the at least two radiating portions. As shown in fig. 5 and 7.

Fig. 5 is a schematic structural diagram of another NFC antenna according to an embodiment of the present application, where in fig. 5, the NFC antenna may be applied to a terminal with a horizontal folding screen. The NFC antenna comprises a radiator and a conductive frame 501, and the radiator may comprise two radiating portions, namely a first radiating portion 502 and a second radiating portion 503, and the conductive frame 501 is included on the transverse folding screen terminal. One end of the first radiating portion 502 is connected to the feeding point 504, the other end is connected to one end of the conductive frame 501, the other end of the conductive frame 501 is connected to one end of the second radiating portion 503, and the other end of the second radiating portion 503 is connected to the grounding point 505, so as to form a loop. Alternatively, the other end of the conductive frame 501 (the end connected to the second radiating portion 503) may also be connected to a ground point 506, thereby forming the structure of the NFC antenna shown in fig. 2.

Optionally, the first radiating portion 502, the conductive bezel 501 and the second radiating portion 503 form a single coil of a C-type structure, thereby implementing NFC functionality.

Alternatively, the radiator may be a single coil of a C-shaped structure alone, alternatively, the single coil of the C-shaped structure is formed by at least two radiating portions, and the shape of the at least two radiating portions may include an L-shaped structure, a straight line structure, a C-shaped structure, or the like. The radiator may not be connected to the conductive frame, so that the NFC function is realized, as shown in fig. 6, the radiator 601 may include a U-shape, and the U-shape radiator 601 may be a single U-shape or may be formed by connecting at least two radiator in a straight shape and/or L-shape end to end.

Fig. 6 is a schematic structural diagram of another NFC antenna according to an embodiment of the present application, in fig. 6, a radiator 601 on a terminal of a transverse folding screen has a U-shaped structure, one end of the radiator 601 is connected to a feeding point 602, and the other end is connected to a grounding point 603, so as to form a loop.

Alternatively, the NFC antenna may be applied to a vertical folding screen terminal including a hinge. In order to avoid the influence on the NFC performance, the rotating shaft and the radiator may be combined, so that the NFC performance of the vertical folding screen terminal is not limited by space, as shown in fig. 7.

Fig. 7 is a schematic structural diagram of another NFC antenna according to an embodiment of the present application, in fig. 7, the NFC antenna includes a radiator and a rotating shaft 701, where the radiator may include two radiating portions, namely a first radiating portion 702 and a second radiating portion 703, and one end of the first radiating portion 702 is connected to a feeding point 704, the other end is connected to one end of the rotating shaft 701, the other end of the rotating shaft 701 is connected to one end of the second radiating portion 703, and the other end of the second radiating portion 703 is connected to a grounding point 705.

Optionally, the NFC antenna may also include only a radiator, and the radiator may include three radiating portions, that is, a first radiating portion, a second radiating portion, and a third radiating portion, and the second radiating portion may be disposed on the rotating shaft. One end of the first radiation part is connected with the feed point, the other end of the first radiation part is connected with one end of the second radiation part, the other end of the second radiation part is connected with one end of the second radiation part, and the other end of the second radiation part is connected with the grounding point.

Optionally, the connection between the radiator and the rotating shaft can be realized through a connecting sheet, and the connecting sheet can ensure that the radiator and the rotating shaft keep good contact under the condition that the rotating shaft rotates.

Second embodiment

The embodiment of the application also provides an NFC antenna, which comprises at least two radiators, wherein one ends of the at least two radiators are connected with a grounding point, the other ends of the at least two radiators are respectively connected with a feed point, and the at least two feed points are connected with a switch.

Optionally, in order to improve performance of the NFC function, the NFC antenna may be provided with at least two radiators, and then the at least two radiators are connected through a switch, so as to select the radiator with high radiation intensity through the switch. Alternatively, the NFC antenna may comprise at least two feeding points, each radiator being connected to a feeding point, the feeding points being connected to the switch. As shown in fig. 8 and 9.

Fig. 8 is a schematic structural diagram of another NFC antenna according to an embodiment of the present application, in fig. 8, two radiators are taken as an example, one end of a first radiator 801 and one end of a second radiator 802 are connected to the same ground 803, the other end of the first radiator 801 is connected to a feeding point 804, the other end of the second radiator 802 is connected to a feeding point 805, the feeding point 804 and the feeding point 805 are both connected to a switch 806, and the switch 806 is connected to a chip 807. The chip 807 can control the communication of the radiator with high signal radiation intensity in the first radiator 801 and the second radiator 802 through the switch 806, so that the performance of the NFC antenna can be improved.

Alternatively, the NFC antenna shown in fig. 8 may be applied to a folding screen terminal or a non-folding screen terminal. When applied to a folding screen terminal, as shown in fig. 9, fig. 9 is a schematic structural diagram of another NFC antenna provided in an embodiment of the present application, in fig. 9, taking an NFC antenna applied to a vertical folding screen terminal as an example, the NFC antenna includes two radiators, a U-shaped radiator, that is, a first radiator 901 and a second radiator 902 are respectively disposed on an upper and a lower folded bodies of the vertical folding screen terminal, and a switch 903 and a grounding point 904 are disposed on a rotating shaft 905 of the vertical folding screen terminal. One end of the first radiator 901 and one end of the second radiator 902 are connected through a grounding point 904, the other end of the first radiator 901 is connected with a feeding point 906, the other end of the second radiator 902 is connected with a feeding point 907, and the feeding point 906 and the feeding point 907 are both connected with a switch 903.

Alternatively, the grounded portions of the two radiators, and the ground point, may be provided on the motherboard or FPC.

In an alternative embodiment of the application, at least two radiators are arranged on two sides of the rotating shaft, and the distance between the at least two radiators is a preset distance.

Alternatively, the NFC antenna as shown in fig. 8 and 9 may be applied to a folding screen terminal, and at least two radiators included in the NFC antenna may be disposed at both sides of a rotation axis of the folding screen terminal. In order to avoid mutual influence between the radiators on the back surface, thereby influencing the performance of the NFC antenna, a certain distance between at least two radiators can be required to be kept so as to ensure the performance of the NFC antenna. Optionally, the spacing between the at least two radiators is greater than or equal to 10 millimeters.

In an alternative embodiment of the present application, the foregoing NFC antenna may be applied to a folding screen terminal (including a horizontal folding screen terminal and a vertical folding screen terminal, etc.), and an image capturing device on the folding screen terminal may be set to 1 mm or more with the NFC antenna.

Third embodiment

The application also provides an NFC device, which comprises the NFC antenna and a circuit module; one end of the NFC antenna is connected with the circuit module, and the other end of the NFC antenna is grounded.

Optionally, the circuit module may include a matching circuit, an impedance converter, a filter circuit, two sets of transceivers and a chip, and one end of the NFC antenna may be connected to the circuit module, and the other end is grounded. The structure of the NFC device provided in this embodiment may be as shown in fig. 10. Referring to fig. 10, fig. 10 is a schematic structural diagram of an NFC device according to an embodiment of the present application, one end of an NFC antenna 1001 is sequentially connected to a chip 1006 through a matching circuit 1002, an impedance converter 1003, a filtering circuit 1004, two sets of transceivers 1005, and the other end of the NFC antenna 1001 is grounded.

Alternatively, since incorrect impedance matching may cause instability of the circuit and decrease circuit efficiency and increase nonlinear distortion, load impedance transferred between the impedance converter 1003 and the NFC antenna 1001 may be matched with characteristic impedance by the matching circuit 1002, thereby increasing stability of the circuit, improving circuit efficiency, and reducing nonlinear distortion of the circuit.

Alternatively, the impedance converter 1003 may perform a conversion process on the received impedance to convert a high impedance to a low impedance, alternatively, the impedance converter 1003 may include a balun.

Optionally, the filter circuit 1004 may adjust the transmission impedance value between the transceiver 1005 and the impedance transformer 1003 to a preset impedance value. In tuning the performance of the NFC device, the impedance may be adjusted to a desired impedance value, i.e., a preset impedance value, on the smith chart by the filter circuit 1004. Optionally, the filtering circuit 1004 may also filter out ripple in the rectified output voltage.

Optionally, the transceiver 1005 includes a receiver and a transmitter for enabling signal interaction between the target device and a counterpart device interacting with the target device, to which the NFC apparatus may be applied. The transceivers 1005 have two groups, i.e., two receivers and two transmitters, and the two groups of transceivers 1005 are symmetrical to ensure balanced states of parameters, such as voltage, current, phase, etc., over the entire circuit; optionally, circuit efficiency may also be improved.

Optionally, a chip 1006 is used to monitor the radiation performance of the NFC antenna 1001.

Optionally, a schematic circuit connection diagram of the NFC antenna 1001, the matching circuit 1002, the impedance converter 1003, the filter circuit 1004, the two sets of transceivers 1005 and the chip 1006 may be shown in fig. 11, and fig. 11 is a schematic circuit connection diagram of an NFC device according to an embodiment of the present application.

In an alternative embodiment of the present application, the impedance transformer 1003 and the matching circuit 1002 are single ended circuits.

Optionally, the circuit is designed into a single-ended input/output circuit scheme, the circuit signal passes through the two paths of RX receivers and the two paths of transmitters TX, is processed by the filter circuit 1004 from the chip 1006, is converted into a single-ended circuit by the impedance of the impedance converter 1003, and then reaches the NFC antenna 1001 by the matching circuit 1002. Because the traditional differential structure is abandoned, the area of the NFC device can be reduced through the single-ended input and output circuit, and therefore the occupation of the space of the main board bracket of the intelligent terminal is reduced.

In an optional embodiment of the present application, the circuit module includes a matching circuit, a filter circuit, and a switch, where the NFC antenna and the matching circuit each include at least two, and the NFC antenna is connected to the matching circuit; one end of the switch is connected with the filter circuit, and the other end of the switch is connected with at least two matching circuits.

Optionally, the circuit module further comprises an impedance converter, a filter circuit, two sets of transceivers and a chip. Referring to fig. 8 and fig. 9, an NFC antenna with high radiation intensity may be selected through a switch, a circuit connection schematic diagram may be shown in fig. 12, fig. 12 is a circuit connection schematic diagram of another NFC device provided by an embodiment of the present application, two radiators in fig. 8 and fig. 9 may be respectively used as an NFC antenna 1001, each NFC antenna 1001 is connected to a matching circuit 1002, each matching circuit 1002 is connected to an impedance converter 1003, and a switch 1007 is connected between the filtering circuit 1004 and the two impedance converters 1003. When the switch 1007 is connected to the two NFC antennas 1001, the chip 1006 can detect the radiation performance of the two NFC antennas 1001, and close the NFC antenna with poor radiation performance through the switch 1007, and only connect the NFC antenna with good radiation performance, so that the performance of the NFC antenna can be improved.

In an alternative embodiment of the application, the NFC device is applied to a landscape or portrait folding screen terminal.

Optionally, the folding main bodies in the transverse folding screen terminal are distributed in the left and right directions of the rotating shaft, that is, the transverse folding screen terminal is transversely folded; the folding main body of the vertical folding screen terminal is distributed in the upper direction and the lower direction of the rotating shaft, namely, the vertical folding screen terminal is vertically folded.

Alternatively, the NFC function may be implemented in a landscape or portrait folding screen terminal by applying the NFC device to the landscape or portrait folding screen terminal.

In an alternative embodiment of the present application, any one of the spring leg, the spring piece, the connecting piece, the PI N leg, and the like may be selected for connection between the foregoing devices, so as to implement signal communication between the connected devices.

The NFC device can reduce the space occupied by the NFC antenna on the main board bracket of the intelligent terminal, improve the space utilization rate of the whole machine and avoid the interference of the NFC module and other modules in space; the problem of poor NFC performance caused by too short conductive frames can be avoided; the magnetic field distribution is larger, so that the user experience is better.

Fourth embodiment

The embodiment of the application also provides an intelligent terminal, which comprises the NFC antenna in any embodiment and/or an NFC device.

In the embodiment of the intelligent terminal provided by the application, any of the above NFC antennas may be included, and/or all technical features of the embodiment of the NFC device may be substantially the same as those of the embodiments of the device, and the description expansion and explanation contents are not repeated herein.

It can be understood that the above scenario is merely an example, and does not constitute a limitation on the application scenario of the technical solution provided by the embodiment of the present application, and the technical solution of the present application may also be applied to other scenarios. For example, as one of ordinary skill in the art can know, with the evolution of the system architecture and the appearance of new service scenarios, the technical solution provided by the embodiment of the present application is also applicable to similar technical problems.

The foregoing embodiment numbers of the present application are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.

The units in the device of the embodiment of the application can be combined, divided and deleted according to actual needs.

In the present application, the same or similar term concept, technical solution and/or application scenario description will be generally described in detail only when first appearing and then repeatedly appearing, and for brevity, the description will not be repeated generally, and in understanding the present application technical solution and the like, reference may be made to the previous related detailed description thereof for the same or similar term concept, technical solution and/or application scenario description and the like which are not described in detail later.

In the present application, the descriptions of the embodiments are emphasized, and the details or descriptions of the other embodiments may be referred to.

The technical features of the technical scheme of the application can be arbitrarily combined, and all possible combinations of the technical features in the above embodiment are not described for the sake of brevity, however, as long as there is no contradiction between the combinations of the technical features, the application shall be considered as the scope of the description of the application.

From the description of the above embodiments, it will be apparent to those skilled in the art that the above embodiments may be implemented by means of software plus necessary general hardware platforms, or may be implemented by hardware.

The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the application, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.

Claims (4)

1. An NFC antenna is characterized by comprising at least one antenna component part, wherein the antenna component part comprises at least one of a conductive frame, a main board, a rotating shaft, a wire and a radiator; the antenna component is of an L-shaped structure or a straight-line-shaped structure;

The antenna component comprises a first radiator, a second radiator and a third radiator, wherein the first radiator is arranged on a rotating shaft of the folding screen terminal, the second radiator and the third radiator are respectively arranged on two sides of the rotating shaft, and the second radiator and the third radiator are close to the rotating shaft and the frame of the folding screen terminal;

one end of the first radiator is connected with a feed point, the other end of the first radiator is connected with one ends of the second radiator and the third radiator, and the other ends of the second radiator and the third radiator are connected with a grounding point; or,

the antenna component comprises the main board and the wire, one end of the wire is connected with one end of the main board, the other end of the wire is connected with a feed point, and the other end of the main board is connected with a grounding point; or,

the antenna component comprises the main board and at least two wires, and any two adjacent wires in the wires are connected with the main board in series.

2. An NFC device, comprising the NFC antenna and circuit module of claim 1;

one end of the NFC antenna is connected with the circuit module, and the other end of the NFC antenna is grounded.

3. The apparatus of claim 2, wherein the circuit module comprises a matching circuit, a filter circuit, and a switch, the NFC antenna and the matching circuit each comprising at least two, the NFC antenna being connected to the matching circuit; one end of the switch is connected with the filter circuit, and the other end of the switch is connected with the at least two matching circuits.

4. A smart terminal comprising an NFC antenna as claimed in claim 1 and/or comprising an NFC device as claimed in claim 2 or 3.