WO2018153019A1 - Nfc antenna and terminal device - Google Patents

Nfc antenna and terminal device Download PDF

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Publication number
WO2018153019A1
WO2018153019A1 PCT/CN2017/095024 CN2017095024W WO2018153019A1 WO 2018153019 A1 WO2018153019 A1 WO 2018153019A1 CN 2017095024 W CN2017095024 W CN 2017095024W WO 2018153019 A1 WO2018153019 A1 WO 2018153019A1
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WO
WIPO (PCT)
Prior art keywords
nfc antenna
nfc
phase shifting
antenna coils
phase
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2017/095024
Other languages
French (fr)
Chinese (zh)
Inventor
孙玉新
张小伟
王吉康
储嘉慧
侯猛
杨小丽
王家明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to CN201780005367.4A priority Critical patent/CN108701890A/en
Publication of WO2018153019A1 publication Critical patent/WO2018153019A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/2258—Supports; Mounting means by structural association with other equipment or articles used with computer equipment
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/44—Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/48—Earthing means; Earth screens; Counterpoises
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
    • H04B5/24—Inductive coupling
    • H04B5/26—Inductive coupling using coils
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/40—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by components specially adapted for near-field transmission
    • H04B5/43—Antennas

Definitions

  • the embodiments of the present invention relate to the field of communications, and in particular, to an NFC antenna and a terminal device.
  • NFC Near Field Communication
  • the NFC-enabled terminal device can be used as an airport check-in verification, a building access key, a traffic card, and a payment card.
  • the space of the NFC antenna architecture is being compressed, which inevitably affects the area of the NFC card, and the NFC card area is limited, resulting in poor experience of the user using the NFC function of the terminal device.
  • the embodiments of the present invention provide an NFC antenna and a terminal device, which are used to solve the problem that the NFC card swipe area is limited, and the user experience of using the NFC function of the terminal device is poor.
  • an embodiment of the present application provides an NFC antenna, including: an NFC signal source, N NFC antenna coils, and N-1 phase shifting modules, where N ⁇ 2 and an integer; N the NFCs An antenna coil is arranged in an order, and one phase shifting module is connected between two adjacent NFC antenna coils; the NFC signal source is connected to a feeding point of any one of the N NFC antenna coils .
  • the phase shifting module comprises: a phase shifter or a phase shifting circuit.
  • the N NFC antenna coils are respectively provided with a coil grounding point, the coil grounding point is connected to a grounding point of the main board, and between the coil grounding point and the grounding point of the main board A filter is provided.
  • the filter comprises: a band pass filter or a band stop filter.
  • a matching circuit is further disposed between the NFC antenna coil and the phase shifting module.
  • the NFC antenna coil is at least one of the following: a metal bezel and a bracket combination.
  • the embodiment of the present application provides a terminal device, including the NFC antenna according to the above first aspect.
  • the NFC antenna provided by the embodiment of the present invention connects the N NFC antenna coils by using a phase shifting module, and maintains the current directions of the N NFC antenna coils to be uniform, forming a current closed loop of the N antenna coils, and expanding the current closed loop.
  • the effective card swipe area of the NFC antenna is expanded, and the experience effect of the user using the NFC function of the terminal device is improved.
  • FIG. 1 is a schematic structural diagram of an NFC antenna according to an embodiment of the present invention.
  • FIG. 2 is a topological diagram of an NFC antenna according to an embodiment of the present invention.
  • FIG. 3 is a topological diagram of an NFC antenna according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of an RC phase shifting circuit according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a matching circuit according to an embodiment of the present invention.
  • the embodiment of the present invention provides an NFC antenna, which is applied to a terminal device.
  • the terminal device may be, but not limited to, a smart phone, a tablet computer, or the like.
  • the NFC antenna provided by the embodiment of the present invention includes: an NFC signal source, N NFC antenna coils, and N-1 phase shifting modules, where N ⁇ 2 and an integer; N NFC antenna coils are arranged in an orderly manner according to the architecture, and A phase shifting module is connected between two adjacent NFC antenna coils; the NFC signal source is connected to a feeding point of any one of the N NFC antenna coils.
  • FIG. 1 is a schematic structural diagram of an NFC antenna according to an embodiment of the present invention.
  • an NFC antenna including two NFC antenna coils is used as an example.
  • the NFC antenna includes: an NFC signal source and two NFCs.
  • An antenna coil (ANT1 and ANT2) and a phase shifting module are described below.
  • the NFC antenna includes two NFC antenna coils and a phase shifting module.
  • the NFC antenna of this embodiment specifically includes:
  • Two NFC antenna coils are arranged in an orderly manner, and one phase shifting module is connected between adjacent two NFC antenna coils; one loop grounding point and one feeding point are arranged on each NFC antenna coil, and the NFC signal source is connected to At the feed point of any one of the two NFC antenna coils.
  • the NFC antenna coil can be set according to the architecture of the terminal device (for example, according to the form of the terminal device antenna), and in the embodiment, the NFC antenna coils are connected in sequence, so two NFCs need to be set.
  • the order of the antenna coils one-way connection between each NFC antenna coil), such as 2, 3, 4, etc. of NFC antenna coils, when there are 3 NFC antenna coils (ANT1, ANT2 and ANT3), ANT1 ANT2 and ANT3 are connected in one direction, and one phase shifting module is connected between ANT1 and ANT2, and one phase shifting module is connected between ANT2 and ANT3.
  • the phase shifting module comprises: a phase shifter or a phase shifting circuit, wherein the phase shifting module can make the current directions in the two NFC antenna coils coincide, that is, the ANT1 and the ANT2 form a closed loop current in series. Loop.
  • FIG. 2 is a topological diagram of an NFC antenna according to an embodiment of the present invention.
  • ANT1 and ANT2 are arranged in an orderly manner, and phase shifting modules A, ANT1 and ANT2 are disposed adjacent to ANT1 and ANT2.
  • the connection relationship is established by the phase shifting module A, and the current is offset at the contact point of the ANT1, ANT2 and the phase shifting module A.
  • the phase shifting module A places the ANT1 and the phase shifting module A
  • the current is phase-shifted so that the current of ANT1 flows into ANT2, and the current directions in ANT1 and ANT2 are kept the same; at the contact point of the upper half of ANT2, phase-shifting module A will ANT2 and phase-shifting module A
  • the current is phase-shifted to cause the current of ANT2 to flow into ANT1, and keep the current directions in ANT1 and ANT2 consistent, thereby expanding the current closed-loop loop of one antenna coil into two antenna coils in the prior art.
  • the current closed-loop loop and the expansion of the current closed-loop loop expand the effective swipe area of the NFC antenna and improve the user experience of using the NFC function of the terminal device.
  • FIG. 3 is a topological diagram of another NFC antenna according to an embodiment of the present invention, where the NFC antenna includes three NFC antenna coils (ANT1, ANT2, and ANT3) and 2 phase shifts Module, ANT1 and ANT2 are connected to a phase shifting module, and ANT2 and ANT3 are connected to a phase shifting module. At the junction of ANT1 and ANT2, the current in ANT1 is in the ANT2 with the action of the phase shifting module.
  • ANT1, ANT2, and ANT3 the current in ANT1 is in the ANT2 with the action of the phase shifting module.
  • the junction is subjected to phase shift processing so that the current of ANT1 flows into ANT2, and the current directions in ANT1 and ANT2 are kept the same; at the junction of ANT2 and ANT3, the current in ANT2 is operated by the action of the phase shifting module.
  • the phase of ANT3 is phase-shifted so that the current of ANT2 flows into ANT3, and the current direction of ANT2 and ANT3 is kept the same.
  • the current of ANT3 flows into ANT2, and the current of ANT3 flows into ANT1, and ANT1 and ANT2 are performed.
  • the phase shifting circuit may be: an RC phase shifting circuit, and the RC phase shifting circuit specifically includes: a series circuit and a parallel capacitor to form an RC shift Phase circuit, ANT1 is connected to the input terminal U of the RC phase shifting circuit, ANT2 is connected to the output terminal U i of the RC phase shifting circuit, and the current of the ANT1 is phase-deflected by the RC phase shifting circuit to flow to the ANT2.
  • the phase shifting circuit may be other circuits having a current phase offset in addition to the RC phase shifting circuit, which is not specifically limited in this embodiment.
  • the function of the phase shifting module is to deflect the current of the NFC antenna coil.
  • the deflection angle of the current phase is 180°, and, for example, when the number of NFC antenna coils is three.
  • the deflection angle of the current phase can be set according to the positions of the three NFC antenna coils.
  • the current phase of the ANT1 at the junction with the ANT2 is 90°, and the current phase of the ANT2 is connected to the ANT3.
  • the deflection angle of the current is 180°. Therefore, the deflection angle of the current phase can be set according to the architecture of the NFC antenna, which is not limited in this embodiment.
  • two NFC antenna coils are respectively provided with a coil grounding point, and the coil grounding point is connected to a grounding point of the main board, and a filter is further disposed between the coil grounding point and the grounding point of the main board.
  • a filter is further disposed between the coil grounding point and the grounding point of the main board.
  • the filter comprises: a band pass filter or a band stop filter.
  • phase shifter or phase shifting circuit By connecting the coil grounding point of the NFC antenna coil to the grounding point of the main board area, and setting a band pass or band stop (NFC operating band) filter between them to realize the return current in the main board area return path, phase shifter or phase shifting circuit There is a low-pass effect in the design process, and the band-passing direction is in the NFC operating band, and the band-stop is high-frequency above 500MHz; the grounding point of the main board area passes the band-pass or band-stop filter to guide the NFC current return path to ensure the NFC signal. There is no distortion during transmission.
  • NFC operating band band pass or band stop
  • a matching circuit is further disposed between the NFC antenna coil and the phase shifting module.
  • FIG. 5 shows a schematic diagram of a matching circuit including an input terminal U and an output terminal U i .
  • the feed point of the ANT 1 is connected to the input terminal U of the matching circuit.
  • the output terminal U i is connected to the NFC signal source; the feed point of the ANT2 is connected to the input terminal U of the matching circuit, and the output terminal U i is connected to the phase shifting module, thereby achieving impedance matching between the NFC coil and the chip.
  • the NFC antenna coil may be one of the following: a metal frame and a bracket combination.
  • the NFC antenna coil can be designed with a metal frame; the NFC antenna coil can also be a combination of a metal frame and a bracket, for example, the bracket can be laser formed (Laser-Direct-structuring, LDS) or Flexible Printed Circuit (FPC); NFC antenna coils can also be realized by metal frame, LDS process and FPC process.
  • LDS Laser-Direct-structuring
  • FPC Flexible Printed Circuit
  • An embodiment of the present invention further provides a terminal device, including the foregoing NFC antenna.
  • the terminal device in this embodiment may be, but not limited to, a smart phone, a tablet computer, etc.
  • the NFC antenna when the terminal device is a metal structure, the NFC antenna may be implemented by using a metal frame, or a combination of a metal frame and a bracket;
  • the NFC antenna can be implemented in the form of a bracket combination.
  • the NFC antenna may be separately configured or shared with other communication antennas, which is not specifically limited in this embodiment.
  • the terminal device can realize NFC function through NFC antenna, for example, as airport boarding verification, building access key, traffic card and payment card, etc., increasing the current closed loop area of the NFC antenna coil, expanding the effective card swipe area of the NFC antenna, and improving the user.
  • NFC feature of the terminal device.
  • the components in the device in the embodiment may be distributed in the device of the embodiment according to the embodiment, or may be correspondingly changed in one or more devices different from the embodiment.
  • the components of the above embodiments may be combined into one component or may be further split into a plurality of subcomponents.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Hardware Design (AREA)
  • General Engineering & Computer Science (AREA)
  • Near-Field Transmission Systems (AREA)

Abstract

The embodiments of the present invention relate to an NFC antenna and a terminal device. The NFC antenna comprises: an NFC signal source, N NFC antenna coils and N-1 phase-shifting modules, wherein N ≥ 2 and is an integer. The N NFC antenna coils are arranged in an orderly manner, and one of the phase-shifting modules is connected between two adjacent NFC antenna coils; and the NFC signal source is connected to a feeding point of any one of the N NFC antenna coils. By means of using a phase-shifting module, N NFC antenna coils are connected, and current directions of the N NFC antenna coils are maintained to be consistent, so as to form a current closed loop of the N antenna coils; and the expansion of the current closed loop correspondingly expands the effective swiping area of an NFC antenna, and the user experience effect of using the NFC function of a terminal device is improved.

Description

一种NFC天线及终端设备NFC antenna and terminal equipment 技术领域Technical field

本发明实施例涉及通信领域，尤其涉及一种NFC天线及终端设备。The embodiments of the present invention relate to the field of communications, and in particular, to an NFC antenna and a terminal device.

背景技术Background technique

随着移动支付及短距离通信(Near Field Communication,NFC)应用的发展，越来越多的终端设备具备NFC功能(例如，智能手机)。NFC是由非接触式射频识别及互联互通技术整合演变而来，在单一芯片上结合感应式读卡器、感应式卡片和点对点的功能，能在短距离内与兼容设备进行识别和数据交换。具有NFC功能的终端设备可作为机场登机验证、大厦的门禁钥匙、交通一卡通和支付卡等。With the development of mobile payment and Near Field Communication (NFC) applications, more and more terminal devices have NFC functions (for example, smart phones). NFC is an evolution of contactless RFID and interoperability technology that combines inductive readers, inductive cards and peer-to-peer functions on a single chip to identify and exchange data with compatible devices over short distances. The NFC-enabled terminal device can be used as an airport check-in verification, a building access key, a traffic card, and a payment card.

在终端设备小型化的背景下，NFC天线架构空间正在被压缩，必然影响NFC刷卡的面积，NFC刷卡面积受限，导致用户使用终端设备NFC功能的体验效果差。In the background of miniaturization of the terminal device, the space of the NFC antenna architecture is being compressed, which inevitably affects the area of the NFC card, and the NFC card area is limited, resulting in poor experience of the user using the NFC function of the terminal device.

发明内容Summary of the invention

本发明实施例提供了一种NFC天线及终端设备，用以解决NFC刷卡面积受限，导致用户使用终端设备NFC功能的体验效果差的问题。The embodiments of the present invention provide an NFC antenna and a terminal device, which are used to solve the problem that the NFC card swipe area is limited, and the user experience of using the NFC function of the terminal device is poor.

第一方面，本申请实施例提供了一种NFC天线，包括：NFC信号源、N个NFC天线线圈和N-1个移相模块，其中，N≥2，且为整数；N个所述NFC天线线圈有序设置，且相邻两个所述NFC天线线圈之间连接有一个所述移相模块；所述NFC信号源连接到所述N个NFC天线线圈中的任意一个的馈电点上。In a first aspect, an embodiment of the present application provides an NFC antenna, including: an NFC signal source, N NFC antenna coils, and N-1 phase shifting modules, where N≥2 and an integer; N the NFCs An antenna coil is arranged in an order, and one phase shifting module is connected between two adjacent NFC antenna coils; the NFC signal source is connected to a feeding point of any one of the N NFC antenna coils .

在一个可能的设计中，所述移相模块包括：移相器或移相电路。In one possible design, the phase shifting module comprises: a phase shifter or a phase shifting circuit.

在一个可能的设计中，N个所述NFC天线线圈分别设置有线圈接地点，所述线圈接地点与主板的接地点连接，且在所述线圈接地点与所述主板的接地点之间还设置有滤波器。In a possible design, the N NFC antenna coils are respectively provided with a coil grounding point, the coil grounding point is connected to a grounding point of the main board, and between the coil grounding point and the grounding point of the main board A filter is provided.

在一个可能的设计中，所述滤波器包括：带通滤波器或带阻滤波器。In one possible design, the filter comprises: a band pass filter or a band stop filter.

在一个可能的设计中，在所述NFC天线线圈与所述移相模块之间还设置有匹配电路。In one possible design, a matching circuit is further disposed between the NFC antenna coil and the phase shifting module.

在一个可能的设计中，所述NFC天线线圈至少为以下之一：金属边框和支架组合。In one possible design, the NFC antenna coil is at least one of the following: a metal bezel and a bracket combination.

第二方面，本申请实施例提供了一种终端设备，包括上述第一方面所述的NFC天线。In a second aspect, the embodiment of the present application provides a terminal device, including the NFC antenna according to the above first aspect.

本发明实施例提供的NFC天线，通过采用移相模块，将N个NFC天线线圈连接，且保持N个NFC天线线圈的电流方向一致，形成N个天线线圈的电流闭环回路，电流闭环回路的扩大相应扩大了NFC天线的有效刷卡面积，提升用户使用终端设备NFC功能的体验效果。 The NFC antenna provided by the embodiment of the present invention connects the N NFC antenna coils by using a phase shifting module, and maintains the current directions of the N NFC antenna coils to be uniform, forming a current closed loop of the N antenna coils, and expanding the current closed loop. Correspondingly, the effective card swipe area of the NFC antenna is expanded, and the experience effect of the user using the NFC function of the terminal device is improved.

附图说明DRAWINGS

图1为本发明实施例提供的一种NFC天线的结构示意图；1 is a schematic structural diagram of an NFC antenna according to an embodiment of the present invention;

图2本发明实施例提供的一种NFC天线的拓扑图；FIG. 2 is a topological diagram of an NFC antenna according to an embodiment of the present invention;

图3本发明实施例提供的一种NFC天线的拓扑图；FIG. 3 is a topological diagram of an NFC antenna according to an embodiment of the present invention;

图4为本发明实施例提供的一种RC移相电路的结构示意图；4 is a schematic structural diagram of an RC phase shifting circuit according to an embodiment of the present invention;

图5为本发明实施例提供的一种匹配电路的结构示意图。FIG. 5 is a schematic structural diagram of a matching circuit according to an embodiment of the present invention.

具体实施方式detailed description

本发明实施例提供了一种NFC天线，应用于终端设备，在本发明实施例中，终端设备可以是，但不限于：智能手机、平板电脑等设备。本发明实施例提供的NFC天线包括：NFC信号源、N个NFC天线线圈和N-1个移相模块，其中，N≥2，且为整数；N个NFC天线线圈按照架构有序设置，且相邻两个NFC天线线圈之间连接有一个移相模块；NFC信号源连接到N个NFC天线线圈中的任意一个NFC天线线圈的馈电点上。通过多天线的思想，扩大了NFC天线的有效刷卡面积，提升用户使用终端设备NFC功能的体验效果。The embodiment of the present invention provides an NFC antenna, which is applied to a terminal device. In the embodiment of the present invention, the terminal device may be, but not limited to, a smart phone, a tablet computer, or the like. The NFC antenna provided by the embodiment of the present invention includes: an NFC signal source, N NFC antenna coils, and N-1 phase shifting modules, where N≥2 and an integer; N NFC antenna coils are arranged in an orderly manner according to the architecture, and A phase shifting module is connected between two adjacent NFC antenna coils; the NFC signal source is connected to a feeding point of any one of the N NFC antenna coils. Through the idea of multi-antenna, the effective card swipe area of the NFC antenna is expanded, and the experience effect of the user using the NFC function of the terminal device is improved.

图1为本发明实施例提供的一种NFC天线的结构示意图，如图1所示，将以NFC天线包括2个NFC天线线圈为例进行介绍，该NFC天线包括：NFC信号源、2个NFC天线线圈(ANT1和ANT2)和1个移相模块，下面将以NFC天线包括2个NFC天线线圈和1个移相模块为例进行介绍，本实施例的NFC天线具体包括：FIG. 1 is a schematic structural diagram of an NFC antenna according to an embodiment of the present invention. As shown in FIG. 1 , an NFC antenna including two NFC antenna coils is used as an example. The NFC antenna includes: an NFC signal source and two NFCs. An antenna coil (ANT1 and ANT2) and a phase shifting module are described below. The NFC antenna includes two NFC antenna coils and a phase shifting module. The NFC antenna of this embodiment specifically includes:

2个NFC天线线圈有序设置，且相邻2个NFC天线线圈之间连接有1个移相模块；每个NFC天线线圈上设置有一个圈接地点和一个馈电点，NFC信号源连接到2个NFC天线线圈中的任意一个NFC天线线圈的馈电点上。Two NFC antenna coils are arranged in an orderly manner, and one phase shifting module is connected between adjacent two NFC antenna coils; one loop grounding point and one feeding point are arranged on each NFC antenna coil, and the NFC signal source is connected to At the feed point of any one of the two NFC antenna coils.

在本发明实施例中，NFC天线线圈可根据终端设备的架构进行设置(如根据终端设备天线的形式进行设置)，且在本实施例中NFC天线线圈是顺次连接，因此需要设置两个NFC天线线圈的顺序(每个NFC天线线圈之间为单向连接)，如NFC天线线圈为2个、3个、4个等，当有3个NFC天线线圈(ANT1、ANT2和ANT3)，ANT1、ANT2和ANT3单向连接，且ANT1和ANT2之间连接1个移相模块，ANT2和ANT3之间连接1个移相模块。In the embodiment of the present invention, the NFC antenna coil can be set according to the architecture of the terminal device (for example, according to the form of the terminal device antenna), and in the embodiment, the NFC antenna coils are connected in sequence, so two NFCs need to be set. The order of the antenna coils (one-way connection between each NFC antenna coil), such as 2, 3, 4, etc. of NFC antenna coils, when there are 3 NFC antenna coils (ANT1, ANT2 and ANT3), ANT1 ANT2 and ANT3 are connected in one direction, and one phase shifting module is connected between ANT1 and ANT2, and one phase shifting module is connected between ANT2 and ANT3.

可选的，作为本发明的一个实施例，移相模块包括：移相器或移相电路，移相模块可以使2个NFC天线线圈中的电流方向一致，即ANT1和ANT2形成串联的闭环电流回路。Optionally, as an embodiment of the present invention, the phase shifting module comprises: a phase shifter or a phase shifting circuit, wherein the phase shifting module can make the current directions in the two NFC antenna coils coincide, that is, the ANT1 and the ANT2 form a closed loop current in series. Loop.

例如，图2本发明实施例提供的一种NFC天线的拓扑图，如图2所示，ANT1和ANT2按照架构有序设置，在ANT1和ANT2相邻处设置有移相模块A，ANT1和ANT2通过移相模块A建立连接关系，在ANT1、ANT2和移相模块A的接触点处电流发生偏移，在ANT1的下半线圈的接触点处，移相模块A将ANT1和移相模块A处的电流进行相位偏移处理，以使ANT1的电流流入ANT2中，且保持ANT1和ANT2中的电流方向一致；在ANT2的上半线圈的接触点处，移相模块A将ANT2和移相模块A处的电流进行相位偏移处理，以使ANT2的电流流入ANT1中，且保持ANT1和ANT2中的电流方向一致，由此，将现有技术中一个天线线圈的电流闭环回路扩展为两个天线线圈的电流闭环回路，电流闭环回路的扩大相应扩大了NFC天线的有效刷卡面积，提升用户使用终端设备NFC功能的体验效果。For example, FIG. 2 is a topological diagram of an NFC antenna according to an embodiment of the present invention. As shown in FIG. 2, ANT1 and ANT2 are arranged in an orderly manner, and phase shifting modules A, ANT1 and ANT2 are disposed adjacent to ANT1 and ANT2. The connection relationship is established by the phase shifting module A, and the current is offset at the contact point of the ANT1, ANT2 and the phase shifting module A. At the contact point of the lower half coil of the ANT1, the phase shifting module A places the ANT1 and the phase shifting module A The current is phase-shifted so that the current of ANT1 flows into ANT2, and the current directions in ANT1 and ANT2 are kept the same; at the contact point of the upper half of ANT2, phase-shifting module A will ANT2 and phase-shifting module A The current is phase-shifted to cause the current of ANT2 to flow into ANT1, and keep the current directions in ANT1 and ANT2 consistent, thereby expanding the current closed-loop loop of one antenna coil into two antenna coils in the prior art. The current closed-loop loop and the expansion of the current closed-loop loop expand the effective swipe area of the NFC antenna and improve the user experience of using the NFC function of the terminal device.

在本实施例中，NFC天线线圈的个数还可为多个，图3为本发明实施例提供的另一种NFC天线的拓扑图，该NFC天线包括3个NFC天线线圈(ANT1、ANT2和ANT3)和2个移相 模块，ANT1和ANT2之间连接1个移相模块，ANT2和ANT3之间连接1个移相模块；在ANT1和ANT2的连接处，通过移相模块的作用，将ANT1中的电流在与ANT2的连接处进行相位偏移处理，以使ANT1的电流流入ANT2中，且保持ANT1和ANT2中的电流方向一致；在ANT2和ANT3的连接处，通过移相模块的作用，将ANT2中的电流在与ANT3的连接处进行相位偏移处理，以使ANT2的电流流入ANT3中，且保持ANT2和ANT3中的电流方向一致，对应的，ANT3的电流流入ANT2，以及ANT3的电流流入ANT1，进行ANT1、ANT2和ANT3形成一电流闭环回路，将现有技术中一个天线线圈的电流闭环回路扩展为三个天线线圈的电流闭环回路，电流闭环回路的扩大相应扩大了NFC天线的有效刷卡面积，提升用户使用终端设备NFC功能的体验效果。In this embodiment, the number of NFC antenna coils may also be multiple. FIG. 3 is a topological diagram of another NFC antenna according to an embodiment of the present invention, where the NFC antenna includes three NFC antenna coils (ANT1, ANT2, and ANT3) and 2 phase shifts Module, ANT1 and ANT2 are connected to a phase shifting module, and ANT2 and ANT3 are connected to a phase shifting module. At the junction of ANT1 and ANT2, the current in ANT1 is in the ANT2 with the action of the phase shifting module. The junction is subjected to phase shift processing so that the current of ANT1 flows into ANT2, and the current directions in ANT1 and ANT2 are kept the same; at the junction of ANT2 and ANT3, the current in ANT2 is operated by the action of the phase shifting module. The phase of ANT3 is phase-shifted so that the current of ANT2 flows into ANT3, and the current direction of ANT2 and ANT3 is kept the same. Correspondingly, the current of ANT3 flows into ANT2, and the current of ANT3 flows into ANT1, and ANT1 and ANT2 are performed. Forming a current closed loop circuit with ANT3, expanding the current closed loop of one antenna coil in the prior art into a current closed loop of three antenna coils, and expanding the current closed loop circuit correspondingly expands the effective card swipe area of the NFC antenna, thereby improving the user's use of the terminal. The experience of the device NFC function.

图4为本发明实施例中移相电路的一种示例，如图4所示，移相电路可以是：RC移相电路，该RC移相电路具体包括：串联电路和并位电容组成RC移相电路，ANT1连接RC移相电路的输入端U，ANT2连接RC移相电路的输出端Ui，ANT1的电流经RC移相电路实现电流的相位偏转，流向ANT2中。4 is an example of a phase shifting circuit according to an embodiment of the present invention. As shown in FIG. 4, the phase shifting circuit may be: an RC phase shifting circuit, and the RC phase shifting circuit specifically includes: a series circuit and a parallel capacitor to form an RC shift Phase circuit, ANT1 is connected to the input terminal U of the RC phase shifting circuit, ANT2 is connected to the output terminal U i of the RC phase shifting circuit, and the current of the ANT1 is phase-deflected by the RC phase shifting circuit to flow to the ANT2.

在本发明实施例中，移相电路除RC移相电路外，还可以是其它形式的具有电流相位偏移的电路，对此，本实施例不作具体限定。In the embodiment of the present invention, the phase shifting circuit may be other circuits having a current phase offset in addition to the RC phase shifting circuit, which is not specifically limited in this embodiment.

需要说明的是，移相模块的作用在于使NFC天线线圈的电流实现偏转，如当NFC天线线圈为2个时，电流相位的偏转角度为180°，又如，当NFC天线线圈为3个时，可根据3个NFC天线线圈有序设置的位置进行电流相位的偏转角度设置，在图3中ANT1在与ANT2连接处的电流相位的偏转角度为90°，ANT2在与ANT3连接处的电流相位的偏转角度为180°，因此，对于电流相位的偏转角度可根据NFC天线的架构进行设定，对此，本实施例不作具体限定。It should be noted that the function of the phase shifting module is to deflect the current of the NFC antenna coil. For example, when the number of NFC antenna coils is two, the deflection angle of the current phase is 180°, and, for example, when the number of NFC antenna coils is three. The deflection angle of the current phase can be set according to the positions of the three NFC antenna coils. In Figure 3, the current phase of the ANT1 at the junction with the ANT2 is 90°, and the current phase of the ANT2 is connected to the ANT3. The deflection angle of the current is 180°. Therefore, the deflection angle of the current phase can be set according to the architecture of the NFC antenna, which is not limited in this embodiment.

可选的，作为本发明的一个实施例，2个NFC天线线圈分别设置有线圈接地点，线圈接地点与主板的接地点连接，且在线圈接地点与主板的接地点之间还设置有滤波器。Optionally, as an embodiment of the present invention, two NFC antenna coils are respectively provided with a coil grounding point, and the coil grounding point is connected to a grounding point of the main board, and a filter is further disposed between the coil grounding point and the grounding point of the main board. Device.

可选的，作为本发明的一个实施例，滤波器包括：带通滤波器或带阻滤波器。Optionally, as an embodiment of the present invention, the filter comprises: a band pass filter or a band stop filter.

通过将NFC天线线圈的线圈接地点与主板区域接地点连接，并在此之间设置带通或带阻(NFC工作频段)滤波器实现引导电流在主板区域回流路径，移相器或移相电路在设计过程有低通效应，及在NFC工作频段是带通移向，对于高频500MHz以上是带阻；主板区域接地点通过带通或带阻滤波器，引导NFC电流回流路径，保证NFC信号在传输过程中不会失真。By connecting the coil grounding point of the NFC antenna coil to the grounding point of the main board area, and setting a band pass or band stop (NFC operating band) filter between them to realize the return current in the main board area return path, phase shifter or phase shifting circuit There is a low-pass effect in the design process, and the band-passing direction is in the NFC operating band, and the band-stop is high-frequency above 500MHz; the grounding point of the main board area passes the band-pass or band-stop filter to guide the NFC current return path to ensure the NFC signal. There is no distortion during transmission.

可选的，作为本发明的一个实施例，在所述NFC天线线圈与所述移相模块之间还设置有匹配电路。Optionally, as an embodiment of the present invention, a matching circuit is further disposed between the NFC antenna coil and the phase shifting module.

例如，图5示出了一种匹配电路的示意图，该匹配电路包括输入端U和输出端Ui,在图1所示的NFC天线中，ANT1的馈电点连接该匹配电路的输入端U，输出端Ui连接NFC信号源；ANT2的馈电点连接该匹配电路的输入端U，输出端Ui连接移相模块，由此，实现NFC线圈与芯片之间的阻抗匹配。For example, FIG. 5 shows a schematic diagram of a matching circuit including an input terminal U and an output terminal U i . In the NFC antenna shown in FIG. 1 , the feed point of the ANT 1 is connected to the input terminal U of the matching circuit. The output terminal U i is connected to the NFC signal source; the feed point of the ANT2 is connected to the input terminal U of the matching circuit, and the output terminal U i is connected to the phase shifting module, thereby achieving impedance matching between the NFC coil and the chip.

可选的，作为本发明的一个实施例，NFC天线线圈可以为以下之一：金属边框和支架组合。Optionally, as an embodiment of the present invention, the NFC antenna coil may be one of the following: a metal frame and a bracket combination.

例如，当终端设备包括金属边框时，NFC天线线圈可以采用金属边框设计；NFC天线线圈还可以采用金属边框和支架的组合设计，例如，支架可以采用激光成型工艺 (Laser-Direct-structuring，LDS)或者柔性电路工艺(Flexible Printed Circuit，FPC)；NFC天线线圈还可以通过金属边框、LDS工艺和FPC工艺互相转接实现。For example, when the terminal device includes a metal frame, the NFC antenna coil can be designed with a metal frame; the NFC antenna coil can also be a combination of a metal frame and a bracket, for example, the bracket can be laser formed (Laser-Direct-structuring, LDS) or Flexible Printed Circuit (FPC); NFC antenna coils can also be realized by metal frame, LDS process and FPC process.

本发明实施例还提供一种终端设备，包括上述的NFC天线。An embodiment of the present invention further provides a terminal device, including the foregoing NFC antenna.

本实施例的终端设备可以是但不限于：智能手机、平板电脑等设备，当该终端设备为金属架构时，NFC天线可采用金属边框实现，或采用金属边框与支架组合的形式实现；当该终端设备为非金属架构时，NFC天线可采用支架组合的形式实现。需要说明的是，在终端设备中该NFC天线可单独设置，也可与其它通讯天线共用，对此，本实施例不作具体限定。The terminal device in this embodiment may be, but not limited to, a smart phone, a tablet computer, etc., when the terminal device is a metal structure, the NFC antenna may be implemented by using a metal frame, or a combination of a metal frame and a bracket; When the terminal device is a non-metal structure, the NFC antenna can be implemented in the form of a bracket combination. It should be noted that, in the terminal device, the NFC antenna may be separately configured or shared with other communication antennas, which is not specifically limited in this embodiment.

终端设备可以通过NFC天线实现NFC功能，例如作为机场登机验证、大厦的门禁钥匙、交通一卡通和支付卡等，增加NFC天线线圈的电流闭环回路面积，扩大了NFC天线的有效刷卡面积，提升用户使用终端设备NFC功能的体验效果。The terminal device can realize NFC function through NFC antenna, for example, as airport boarding verification, building access key, traffic card and payment card, etc., increasing the current closed loop area of the NFC antenna coil, expanding the effective card swipe area of the NFC antenna, and improving the user. Experience the effects of using the NFC feature of the terminal device.

本领域普通技术人员可以理解：附图只是一个实施例的示意图，附图中的模块或流程并不一定是实施本发明所必须的。It will be understood by those of ordinary skill in the art that the drawings are only a schematic diagram of an embodiment, and the modules or processes in the drawings are not necessarily required to implement the invention.

本领域普通技术人员可以理解：实施例中的装置中的部件可以按照实施例描述分布于实施例的装置中，也可以进行相应变化位于不同于本实施例的一个或多个装置中。上述实施例的部件可以合并为一个部件，也可以进一步拆分成多个子部件。It will be understood by those skilled in the art that the components in the device in the embodiment may be distributed in the device of the embodiment according to the embodiment, or may be correspondingly changed in one or more devices different from the embodiment. The components of the above embodiments may be combined into one component or may be further split into a plurality of subcomponents.

以上所述，仅为本发明实施例较佳的具体实施方式，但本发明实施例的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到的变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明实施例的保护范围应该以权利要求的保护范围为准。 The above is only a preferred embodiment of the present invention, but the scope of protection of the embodiments of the present invention is not limited thereto, and any person skilled in the art can easily within the technical scope disclosed by the present invention. All changes or substitutions contemplated are intended to be included within the scope of the invention. Therefore, the scope of protection of the embodiments of the present invention should be determined by the scope of the claims.

Claims (7)

一种NFC天线，其特征在于，包括：An NFC antenna, comprising: NFC信号源、N个NFC天线线圈和N-1个移相模块，其中，N≥2，且为整数；An NFC signal source, N NFC antenna coils, and N-1 phase shifting modules, wherein N≥2 and being an integer; N个所述NFC天线线圈有序设置，且相邻两个所述NFC天线线圈之间连接有一个所述移相模块；N said NFC antenna coils are arranged in an orderly manner, and one phase shifting module is connected between adjacent two of said NFC antenna coils; 所述NFC信号源连接到所述N个NFC天线线圈中的任意一个的馈电点上。The NFC signal source is coupled to a feed point of any one of the N NFC antenna coils. 根据权利要求1所述的NFC天线，其特征在于，所述移相模块包括：移相器或移相电路。The NFC antenna according to claim 1, wherein the phase shifting module comprises: a phase shifter or a phase shifting circuit. 根据权利要求1所述的NFC天线，其特征在于，N个所述NFC天线线圈分别设置有线圈接地点，所述线圈接地点与主板的接地点连接，且在所述线圈接地点与所述主板的接地点之间还设置有滤波器。The NFC antenna according to claim 1, wherein N of the NFC antenna coils are respectively provided with a coil grounding point, the coil grounding point is connected to a grounding point of the main board, and the coil grounding point is A filter is also provided between the grounding points of the main board. 根据权利要求3所述的NFC天线，其特征在于，所述滤波器包括：带通滤波器或带阻滤波器。The NFC antenna according to claim 3, wherein the filter comprises: a band pass filter or a band stop filter. 根据权利要求1所述的NFC天线，其特征在于，在所述NFC天线线圈与所述移相模块之间还设置有匹配电路。The NFC antenna according to claim 1, wherein a matching circuit is further disposed between the NFC antenna coil and the phase shifting module. 根据权利要求1-5任一项所述的NFC天线，其特征在于，所述NFC天线线圈至少为以下之一：金属边框和支架组合。The NFC antenna according to any one of claims 1 to 5, wherein the NFC antenna coil is at least one of the following: a metal frame and a bracket combination. 一种终端设备，其特征在于，包括如权利要求1-6任一项所述的NFC天线。 A terminal device, comprising the NFC antenna according to any one of claims 1-6.
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CN112803147A (en) * 2019-11-14 2021-05-14 华为技术有限公司 Antenna and mobile terminal
CN112803147B (en) * 2019-11-14 2023-05-05 华为技术有限公司 Antenna and mobile terminal
CN110890616A (en) * 2019-11-28 2020-03-17 维沃移动通信有限公司 an electronic device

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