WO2018019080A1 - 一种nfc天线结构及移动终端 - Google Patents

一种nfc天线结构及移动终端 Download PDF

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Publication number
WO2018019080A1
WO2018019080A1 PCT/CN2017/090738 CN2017090738W WO2018019080A1 WO 2018019080 A1 WO2018019080 A1 WO 2018019080A1 CN 2017090738 W CN2017090738 W CN 2017090738W WO 2018019080 A1 WO2018019080 A1 WO 2018019080A1
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WIPO (PCT)
Prior art keywords
metal floor
nfc
antenna structure
coil
nfc antenna
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PCT/CN2017/090738
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English (en)
French (fr)
Inventor
蒋锐
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Vivo Mobile Communication Co Ltd
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Vivo Mobile Communication Co Ltd
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Publication of WO2018019080A1 publication Critical patent/WO2018019080A1/zh
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • 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
    • H01Q1/243—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 with built-in antennas
    • 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
    • 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

Definitions

  • the present disclosure relates to the field of communications, and more particularly to an NFC antenna structure and a mobile terminal.
  • the NFC antenna design in the related art is to place a complete coil on a metal floor such as a metal back cover or a screen bracket.
  • the metal floor such as the metal back cover or the screen bracket has a shielding effect on the electromagnetic field, which will hinder Magnetic field radiation affects the performance of the NFC antenna; in addition, the eddy current radiation formed on the metal floor such as the metal back cover or the screen bracket also interferes with the magnetic field generated by the NFC coil, affecting the performance of the NFC antenna.
  • the present disclosure provides an NFC antenna structure and a mobile terminal, which can solve the problem that the metal floor such as a metal back cover or a screen bracket interferes with the NFC antenna structure in the NFC antenna design in the related art.
  • an embodiment of the present disclosure provides an NFC antenna structure, which is applied to a mobile terminal, where the NFC antenna structure includes:
  • a metal floor wherein a part of the NFC coil is fixed on the metal floor, and the first end of the NFC coil is in contact with the metal floor, and the second end is in contact with the ground spring on the main board;
  • the feed is in contact with the metal floor, and the signal current from the feed is conducted to the NFC coil through the metal floor, and an on current is formed between the first end and the second end of the NFC coil.
  • an embodiment of the present disclosure provides a mobile terminal including the above-described NFC antenna structure.
  • an embodiment of the present disclosure provides an NFC antenna structure and a mobile terminal, by fixing a part of an NFC coil to a metal floor, and the first end of the NFC coil is in contact with the metal floor, and the second end is The ground shrapnel on the main board contacts and connects the feed to the metal floor.
  • the metal floor is designed as a part of the NFC coil, so that the signal current sent by the feed is conducted to the NFC coil through the metal floor, so that the NFC coil is
  • the conduction current is formed between the first end and the second end, so that the metal floor becomes a favorable part of the magnetic field radiation of the NFC antenna structure, which solves the interference of the metal floor on the magnetic field generated by the NFC antenna structure, and can greatly improve the structure of the NFC antenna. Performance.
  • FIG. 1 is a schematic structural diagram of an NFC antenna structure provided by an embodiment of the present disclosure
  • FIG. 2 is a schematic view showing a current flow direction of the NFC antenna structure shown in FIG. 1;
  • FIG. 3 is a schematic diagram showing another structure of an NFC antenna structure provided by an embodiment of the present disclosure.
  • FIG. 4 is a schematic diagram showing still another structure of an NFC antenna structure provided by an embodiment of the present disclosure.
  • Figure 5 is a schematic view showing the current flow of the NFC antenna structure shown in Figure 4.
  • FIG. 6 is a schematic diagram showing still another structure of an NFC antenna structure provided by an embodiment of the present disclosure.
  • Embodiments of the present disclosure provide an NFC antenna structure that can be applied to a mobile terminal, wherein the mobile terminal can include, for example, a mobile phone, a notebook computer, a tablet computer, and the like.
  • the NFC antenna structure includes: a feed 110 disposed on the main board; an NFC coil 120; a metal floor 130 , wherein a part of the NFC coil 120 is fixed on the metal floor 130 , and the NFC coil 120 is One end is in contact with the metal floor 130, and the second end is in contact with the ground spring (not shown) on the main board; the feed 110 is in contact with the metal floor 130, and the signal current from the feed 110 is conducted through the metal floor 130.
  • the NFC coil 120 forms an on current between the first end and the second end of the NFC coil 120.
  • the NFC antenna structure of the embodiment of the present disclosure includes a feed source 110, a metal floor 130, and an NFC coil 120.
  • the feed source 110 is disposed on the main board and is in contact with the metal floor 130 and connected to the first contact point 111, the NFC coil 120.
  • a portion of the NFC coil 120 is fixedly connected to the metal floor 130, and the first end of the NFC coil 120 is in contact with the metal floor 130 to be connected to the second contact point 121.
  • the signal 110 provided on the main board sends a signal current
  • the metal floor 130 is passed through the metal floor 130.
  • the signal current is conducted from the first contact point 111 to the second contact point 121, and then to the NFC coil 120.
  • the second end of the NFC coil 120 is in contact with the ground dome disposed on the main board to be connected to the third contact point 122.
  • an on current is formed between the first end and the second end of the NFC coil 120, and the third contact point 122 is connected to the ground shrapnel at the second end, and the current is transmitted through the ground shrapnel. Pass to the ground wire on the motherboard to form a complete loop.
  • the NFC coil 120 is partially fixedly disposed on the metal floor 130, the shielding effect of the metal floor 130 on the NFC antenna structure can be effectively eliminated, and at the same time, the signal current is conducted by the metal floor 130, and the metal floor 130 is changed into an NFC coil.
  • the metal floor 130 becomes an advantageous part of the magnetic field radiation of the NFC antenna structure, thereby enhancing the performance of the NFC antenna structure.
  • the NFC coil 120 is a planar metal coil formed by winding from the inside to the outside (or from the outside to the inside), which can be wound into a rectangular shape, a circular shape or the like.
  • the metal floor 130 may include a plurality of portions separated from each other, and the NFC coils 120 may be fixedly disposed on a plurality of portions of the metal floor 130 separated from each other.
  • the NFC antenna structure further includes a slit that divides the metal floor 130 into the first part.
  • the minute portion 131 and the second portion 132, the NFC coil 120 includes a first coil portion disposed on the first portion 131, and a second coil portion disposed on the second portion 132; the first coil portion and the second coil portion A portion of the metal floor 130 that is fixed to the NFC coil.
  • the NFC antenna structure may further include short wires 140 respectively connected to the first portion 131 and the second portion 132, wherein the contact point of the feed 110 with the metal floor 130 and the NFC The contact points of the first end of the coil and the metal floor 130 are respectively separated by two parts of the metal floor 130; the signal current from the feed 110 is conducted to the NFC coil 120 through the metal floor 130 and the short wire 140, and the NFC coil 120 An on current is formed between one end and the second end.
  • the first contact point 111 in which the feed source 110 is in contact with the metal floor 130 and the second contact point 121 in which the first end of the NFC coil 120 is in contact with the metal floor 130 are respectively located in different parts of the metal floor 130 which are separated from each other and pass through
  • the short wire 140 connects the first portion 131 and the second portion 132 to conduct signal currents from the feed source 110, so that the signal current from the feed source 110 can be conducted in two portions of the metal floor 130 that are separated from each other.
  • the NFC antenna structure can make full use of the two parts of the metal floor 130 phase separation to enhance the performance of the NFC antenna structure.
  • the following embodiments of the NFC antenna structure can be referred to to further understand the above embodiments of the present disclosure.
  • the feed source 110 is in contact with the first portion 131 of the metal floor 130 and is connected to the first contact point 111;
  • the NFC coil 120 includes a first coil portion disposed on the first portion 131 and disposed at the second a second coil portion on portion 132 and a third coil portion spanning slit 133, the third coil portion is not in contact with metal floor 130;
  • NFC coil 120 is rectangularly wound, and the first end of NFC coil 120 is opposite to metal floor 130
  • the two portions 132 are in contact with the second contact point 121, wherein the first contact point 111 and the second contact point 121 are located near opposite diagonals of the inner circumference of the NFC coil 120;
  • the short wiring 140 is disposed in the slit 133 and respectively
  • the first portion 131 is connected to the second portion 132, and the short wire 140 is adjacent to the second contact point 121;
  • the second end of the NFC coil 120 is in contact with the ground spring piece and connected to the third contact point 122, wherein the ground shrapn
  • the feed 110 sends a signal current, and the signal current is uploaded by the first contact point 111 on the first portion 131 of the metal floor 130. And conducting, via short wire 140, to second contact point 121 (ie, the first end of NFC coil 120) on second portion 132, and then conducting on NFC coil 120, and at the first end and the second end The conduction current is formed, and then transmitted to the ground shrapnel via the third contact point 122 (ie, the second end), and reaches a ground line on the main board to form a complete loop, thereby generating a magnetic field, thereby realizing the NFC function.
  • second contact point 121 ie, the first end of NFC coil 120
  • third contact point 122 ie, the second end
  • the utilization ratio of the metal floor can be increased, that is, the distance between the first contact point 111 and the second contact point 121 can be shortened on the basis of the foregoing first example NFC antenna structure.
  • the first contact point 111 in which the feed source 110 is in contact with the first portion 131 and the second contact point in which the first end is in contact with the second portion 132 121 is located near the same side of the inner circumference of the NFC coil 120.
  • the distance between the first contact point 111 and the second contact point 121 is shortened, and in the specific application of the NFC antenna structure of the second example (refer to The current flow direction shown in FIG. 2), after the signal current from the feed 110 is conducted to the second portion 132 via the first portion 131 and the short wiring 140, the signal current is conducted to the second contact point 121 on the second portion 132.
  • the increase in distance increases the utilization of the second portion 132 of the metal floor 130, making the metal floor 130 an advantageous part of the magnetic field radiation of the NFC antenna structure, further enhancing the performance of the NFC antenna structure.
  • the position of the NFC coil 120 and the feed 110 on the metal floor can be changed.
  • the feed source 110 is in contact with the second portion 132 of the metal floor 130 and is connected to the first contact point 111.
  • the first end of the NFC coil 120 is in contact with the first portion 131 of the metal floor 130 and is connected to the second contact point 121.
  • the arrow shown in FIG. 5 is the current direction, and the signal current from the feed 110 is uploaded by the first contact point 111 on the second portion 132 of the metal floor 130. And conducting through the short wire 140 to the second contact point 121 on the first portion 131 (ie, the first end of the NFC coil 120), then conducting on the NFC coil 120, and between the first end and the second end Forming an on current, and then conducting to the ground shrapnel via the third contact point 122 (ie, the second end), and reaching a ground line on the main board to form a complete loop.
  • the current flow direction of the NFC antenna structure in the third example The current flow directions of the NFC antenna structure in an example and a second example are opposite.
  • the first portion 131 and the second portion 132 of the metal floor 130 are completely separated, and the first coil portion of the NFC coil 120 is fixed to the first portion 131, and the second coil portion Fixed to the second portion 132.
  • the contact point of the feed source 110 with the metal floor 130 and the contact point of the first end with the metal floor 130 are located on the metal floor 130.
  • the same portion, that is, the first contact point 111 and the second contact point 121 are located at the same portion of the metal floor 130, that is, the first contact point 111 and the second contact point 121 are simultaneously located at the first portion 131 or the second portion 132.
  • the first contact point 111 and the second contact point 121 are simultaneously located in the first portion 131.
  • the signal current emitted by the feed 110 is conducted by the first portion 131 of the metal floor 130.
  • the first portion 131 is changed to a portion of the NFC coil.
  • the second portion of the metal floor 130 is not utilized, and therefore, a deformation as a fourth example
  • the metal floor 130 may include only the first portion 131 when the structure permits.
  • a portion of the NFC coil 120 is fixed to the first portion 131 of the metal floor 130, and the first contact point 111 and the second contact point 121 are simultaneously located.
  • the first part 131 may be simultaneously located in the second portion 132.
  • the current flow of the NFC antenna structure and the NFC antenna structure in the fourth example The current flows in the opposite direction.
  • the contact point between the second end of the NFC coil 120 and the ground shrapnel on the main board may be That is, the third contact point 122 is located in the projection area of the metal floor 130 projected on the main board.
  • the NFC coil 120 may be made of a flexible circuit board and attached to a fixed metal floor 130.
  • the NFC coil 120 can also be directly formed on the metal floor 130 by a printing process or an LDS (Laser Direct Structuring) process.
  • the metal floor 130 can be a metal back cover or a display stand on the mobile terminal.
  • the metal floor 130 can also be a Printed Circuit Board (PCB).
  • PCB Printed Circuit Board
  • embodiments of the present disclosure also provide a mobile terminal including the above-described NFC antenna structure.
  • the main structure of the mobile terminal can refer to related technologies, and details are not described herein.
  • the metal floor of the NFC antenna structure may be a printed circuit board, or a metal back cover or a display stand of the mobile terminal.
  • the mobile terminal may be a mobile phone, a notebook computer, a tablet computer, or the like.
  • the mobile terminal having the NFC antenna structure also has corresponding technical effects, and details are not described herein again.
  • the NFC antenna structure and the mobile terminal provided by the embodiments of the present disclosure are configured to fix a part of the NFC coil to the metal floor, and the first end of the NFC coil is in contact with the metal floor, and the second end is in contact with the ground shrapnel on the main board.
  • the feed source is in contact with the metal floor.
  • the metal floor is designed as a part of the NFC coil, so that the signal current sent by the feed is conducted to the NFC coil through the metal floor, and the first end and the second end of the NFC coil are made.
  • the conduction current is formed between the metal floor to become a favorable part of the magnetic field radiation of the NFC antenna structure, which solves the interference of the metal floor on the magnetic field generated by the NFC antenna structure, and can greatly improve the performance of the NFC antenna structure.
  • connection In the present disclosure, the terms "connected”, “fixed”, “set”, etc., are to be understood broadly, and may be either a fixed connection or a detachable connection, or Integral; can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium, which can be the internal communication of two elements or the interaction of two elements.
  • intermediate medium which can be the internal communication of two elements or the interaction of two elements.

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  • Near-Field Transmission Systems (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)

Abstract

本公开文本提供一种NFC天线结构及移动终端，其中，该NFC天线结构应用于移动终端，NFC天线结构包括：设置于主板上的馈源；NFC线圈；金属地板，其中NFC线圈的一部分固定于金属地板上，且NFC线圈的第一端与主板上的地弹片接触连接，第二端与金属地板接触连接；馈源与金属地板接触连接，馈源发出的信号电流通过金属地板传导至NFC线圈，NFC线圈的第二端与第一端之间形成导通电流。

Description

一种NFC天线结构及移动终端
相关申请的交叉引用
本申请主张在2016年7月28日在中国提交的中国专利申请No.201610614506.0的优先权，其全部内容通过引用包含于此。
技术领域
本公开文本涉及通信领域，特别是指一种NFC天线结构及移动终端。
背景技术
随着移动终端对于金属质感的要求越来越凸显，移动终端上的金属占比不断增加，如今，金属外壳已成为一种潮流。但金属外壳会导致NFC(NearField Communication，近场通信)天线性能指标大幅下降的问题。
相关技术中的NFC天线设计都是在金属后盖或者屏支架等金属地板上放置一个完整的线圈，在这种情形下，由于金属后盖或者屏支架等金属地板对电磁场存在屏蔽作用，将阻碍磁场辐射，影响NFC天线性能；另外，金属后盖或者屏支架等金属地板上形成的涡流辐射，也会对NFC线圈产生的磁场进行干扰，影响NFC天线的性能。
发明内容
本公开文本提供一种NFC天线结构及移动终端，能够解决相关技术中的NFC天线设计中，金属后盖或者屏支架等金属地板对NFC天线结构产生干扰的问题。
第一方面，本公开文本实施例提供一种NFC天线结构，应用于移动终端，该NFC天线结构包括：
设置于主板上的馈源；
NFC线圈；
金属地板，其中NFC线圈的一部分固定于金属地板上，且NFC线圈的第一端与金属地板接触连接，第二端与主板上的地弹片接触连接；
馈源与金属地板接触连接，馈源发出的信号电流通过金属地板传导至NFC线圈，NFC线圈的第一端与第二端之间形成导通电流。
第二方面，本公开文本实施例提供一种移动终端，该移动终端包括上述NFC天线结构。
与相关技术相比，本公开文本的实施例提供的NFC天线结构及移动终端，通过将NFC线圈的一部分固定于金属地板上，且NFC线圈的第一端与金属地板接触连接，第二端与主板上的地弹片接触连接，将馈源与金属地板接触连接，此时，将金属地板设计成NFC线圈的一部分，从而通过金属地板使馈源发出的信号电流传导至NFC线圈，使NFC线圈的第一端与第二端之间形成导通电流，这样，将金属地板变为NFC天线结构的磁场辐射的有利部分，解决了金属地板对NFC天线结构产生磁场的干扰，能够大幅提高NFC天线结构的性能。
附图说明
为了更清楚地说明本公开文本实施例的技术方案，下面将对本公开文本实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开文本的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1表示本公开文本实施例提供的NFC天线结构的一种结构示意图；
图2表示图1所示的NFC天线结构的电流流向示意图；
图3表示本公开文本实施例提供的NFC天线结构的另一种结构示意图；
图4表示本公开文本实施例提供的NFC天线结构的又一种结构示意图；
图5表示图4所示的NFC天线结构的电流流向示意图；
图6表示本公开文本实施例提供的NFC天线结构的再一种结构示意图。
具体实施方式
下面将结合本公开文本一些实施例中的附图，对本公开文本一些实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本公开文本一部分实施例，而不是全部的实施例。基于本公开文本中的实施例，本 领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本公开文本保护的范围。
本公开文本实施例提供一种NFC天线结构，该NFC天线结构可应用于移动终端，其中，该移动终端可以包括诸如手机、笔记本电脑、平板电脑等。
请参见图1至图6，该NFC天线结构包括：设置于主板上的馈源110；NFC线圈120；金属地板130，其中NFC线圈120的一部分固定于金属地板130上，且NFC线圈120的第一端与金属地板130接触连接，第二端与主板上的地弹片(图未示出)接触连接；馈源110与金属地板130接触连接，馈源110发出的信号电流通过金属地板130传导至NFC线圈120，NFC线圈120的第一端与第二端之间形成导通电流。
本公开文本实施例的NFC天线结构包括馈源110、金属地板130以及NFC线圈120；其中，馈源110设置于主板上，且与金属地板130接触连接于第一接触点111，NFC线圈120的一部分固定设置于金属地板130上，并且NFC线圈120的第一端与金属地板130接触连接于第二接触点121，这样，在设置于主板上的馈源110发出信号电流后，通过金属地板130将信号电流由第一接触点111传导至第二接触点121，进而传导至NFC线圈120；另外，NFC线圈120的第二端与设置在主板上的地弹片接触连接于第三接触点122，在信号电流传导至NFC线圈120后，NFC线圈120的第一端和第二端之间形成导通电流，并在第二端与地弹片接触连接的第三接触点122，将电流经由地弹片传递至主板上的地线，以形成一个完整的回路。这里，由于NFC线圈120是部分固定设置在金属地板130上，可以有效消除金属地板130对于NFC天线结构的屏蔽作用，同时，利用金属地板130对信号电流进行传导，将金属地板130变为NFC线圈的一部分，使金属地板130成为NFC天线结构的磁场辐射的有利部分，进而增强NFC天线结构的性能。
另外，该NFC线圈120为由内向外(或由外向内)逐层绕制形成的平面金属线圈，其可以绕制成矩形、圆形或其他形状。
在一实施例中，金属地板130可以包括相互分离的多个部分，并且，NFC线圈120可以固定设置在金属地板130相互分离的多个部分上。具体地，在本实施例中，NFC天线结构还包括缝隙，该缝隙将金属地板130分成第一部 分131和第二部分132，NFC线圈120包括设置于第一部分131上的第一线圈部分，以及包括设置于第二部分132上的第二线圈部分；该第一线圈部分和第二线圈部分即为NFC线圈固定于金属地板130的部分。
参见图1至图5，在一实施例中，该NFC天线结构还可以包括分别与第一部分131和第二部分132连接的短接线140，其中，馈源110与金属地板130的接触点以及NFC线圈的第一端与金属地板130的接触点分别处于金属地板130相分离的两个部分；馈源110发出的信号电流通过金属地板130以及短接线140传导至NFC线圈120，NFC线圈120的第一端与第二端之间形成导通电流。这里，馈源110与金属地板130接触连接的第一接触点111和NFC线圈120的第一端与金属地板130接触连接的第二接触点121分别位于金属地板130相分离的不同部分，并且通过短接线140将该第一部分131和第二部分132连接，以对馈源110发出的信号电流进行传导，使馈源110发出的信号电流可在金属地板130相分离的两个部分进行传导，从而使NFC天线结构可以充分利用金属地板130相分离的两个部分，增强NFC天线结构的性能。
具体地，可以参见以下几种NFC天线结构的设置方式，以对本公开文本上述实施例做进一步理解。
参见图1，在第一示例中，馈源110与金属地板130的第一部分131接触连接于第一接触点111；NFC线圈120包括设置于第一部分131上的第一线圈部分、设置于第二部分132上的第二线圈部分以及跨越缝隙133的第三线圈部分，第三线圈部分未与金属地板130接触；NFC线圈120呈矩形绕制，NFC线圈120的第一端与金属地板130的第二部分132接触连接于第二接触点121，其中，第一接触点111和第二接触点121位于NFC线圈120的内圈相对的两个对角附近；短接线140设置于缝隙133且分别与第一部分131和第二部分132连接，短接线140靠近第二接触点121；NFC线圈120的第二端与地弹片接触连接于第三接触点122，其中，地弹片和馈源110均设置于主板上，且均位于缝隙133。
在具体应用中，参见图2，图2中所示箭头为电流方向，馈源110发出信号电流，信号电流由第一接触点111在金属地板130的第一部分131上传 导，并经短接线140传导至位于第二部分132上的第二接触点121(即NFC线圈120的第一端)，然后在NFC线圈120上传导，并在第一端和第二端之间形成导通电流，再经第三接触点122(即第二端)传导至地弹片，并到达主板上的地线形成一个完整的回路，从而产生磁场，进而可以实现NFC功能。
另外，为进一步提高NFC天线结构的性能，可增加金属地板的利用率，即在前述第一示例NFC天线结构的基础上，可以缩短第一接触点111与第二接触点121之间的距离，请参见图3，与前述第一示例相比较，在第二示例中，馈源110与第一部分131接触连的第一接触点111和第一端与第二部分132接触连接的第二接触点121位于NFC线圈120内圈的同一侧边附近，此时，第一接触点111和第二接触点121之间的距离缩短，而在第二示例的NFC天线结构的具体应用中(这里可以参照图2所示的电流流向示意图)，馈源110发出的信号电流在经第一部分131以及短接线140传导至第二部分132后，信号电流在第二部分132上传导至第二接触点121的距离增加，增加了对于金属地板130的第二部分132的利用部分，使金属地板130成为NFC天线结构的磁场辐射的有利部分，进一步增强NFC天线结构的性能。
另外，作为上述第二示例的NFC天线结构的一种变形，可以改变NFC线圈120及馈源110在金属地板上的设置位置，此时，参见图4，与前述第二示例相比较，在第三示例中，馈源110与金属地板130的第二部分132接触连接于第一接触点111，NFC线圈120的第一端与金属地板130的第一部分131接触连接于第二接触点121。
参见图5，在第三示例的NFC天线结构的具体应用中，图5中所示箭头为电流方向，馈源110发出的信号电流由第一接触点111在金属地板130的第二部分132上传导，并经短接线140传导至位于第一部分131上的第二接触点121(即NFC线圈120的第一端)，然后在NFC线圈120上传导，并在第一端和第二端之间形成导通电流，再经第三接触点122(即第二端)传导至地弹片，并到达主板上的地线形成一个完整的回路，这里，第三示例中NFC天线结构的电流流向与第一示例和第二示例中NFC天线结构的电流流向相反。
另外，在一实施例中，金属地板130的第一部分131和第二部分132完全分离，NFC线圈120的第一线圈部分固定于第一部分131，第二线圈部分 固定于第二部分132，此时，为使NFC天线结构的形成完整的电流通路，需将馈源110与金属地板130的接触点以及第一端与金属地板130的接触点位于金属地板130的同一部分，也就是说，第一接触点111和第二接触点121位于金属地板130的同一部分，即将第一接触点111和第二接触点121同时位于第一部分131或者第二部分132。
参见图6，在第四示例中，第一接触点111和第二接触点121同时位于第一部分131，在具体应用中，馈源110发出的信号电流利用金属地板130的第一部分131进行传导，将第一部分131变为NFC线圈的一部分。另外，由于上述第四示例中，只利用金属地板130的第一部分131对馈源110发出的信号电流进行传导，并未利用金属地板130的第二部分，因此，作为第四示例的一种变形，在结构允许的情况下，该金属地板130可以只包括第一部分131，此时，NFC线圈120的一部分固定于金属地板130的第一部分131，第一接触点111和第二接触点121同时位于第一部分131。当然，作为第四示例的另一种变形，同样可以将第一接触点111和第二接触点121同时位于第二部分132，此时，NFC天线结构的电流流向与第四示例中NFC天线结构的电流流向相反。
另外，在一实施例中，为减少NFC天线结构对移动终端中的其它天线(例如WiFi天线、蓝牙天线)的影响，可以将NFC线圈120的第二端与主板上的地弹片的接触点，即第三接触点122，位于金属地板130投影于主板的投影区域内。
此外，NFC线圈120可以采用柔性电路板制成，并将一部分贴附固定金属地板130上。NFC线圈120也可以采用印刷工艺或者LDS(Laser Direct Structuring，激光直接成型技术)工艺直接制成于金属地板130。
另外，金属地板130可以为移动终端上的金属后盖或者显示屏支架。当然金属地板130也可以为印制电路板(Printed Circuit Board，PCB)。
另外，本公开文本实施例还提供一种移动终端，该移动终端包括上述NFC天线结构。该移动终端的主体结构可以参考相关技术，这里不作赘述。
在一实施例中，该NFC天线结构的金属地板可以为印制电路板，或者移动终端的金属后盖或显示屏支架。
本公开文本实施例中，该移动终端可以为手机、笔记本电脑或者平板电脑等。
由于上述实施例提供的NFC天线结构具备前述技术效果，因此具有该NFC天线结构的移动终端同样具备相应技术效果，这里不再赘述。
本公开文本实施例提供的NFC天线结构及移动终端，通过将NFC线圈的一部分固定于金属地板上，且NFC线圈的第一端与金属地板接触连接，第二端与主板上的地弹片接触连接，将馈源与金属地板接触连接，此时，将金属地板设计成NFC线圈的一部分，从而通过金属地板使馈源发出的信号电流传导至NFC线圈，使NFC线圈的第一端与第二端之间形成导通电流，这样，将金属地板变为NFC天线结构的磁场辐射的有利部分，解决了金属地板对NFC天线结构产生磁场的干扰，能够大幅提高NFC天线结构的性能。
应理解，说明书的描述中，提到的参考术语“一实施例”、“一个实施例”或“一些实施例”意味着与实施例有关的特定特征、结构或特性包括在本公开文本的至少一个实施例或示例中。因此，在整个说明书各处出现的“在一实施例中”、“在一个实施例中”或“在一些实施例中”未必一定指相同的实施例。此外，这些特定的特征、结构或特性可以任意适合的方式结合在一个或多个实施例中。
另外，在本文中的一个或多个实施例中，诸如“包括”或“包含”用于说明存在列举的特征或组件，但不排除存在一个或多个其它列举的特征或者一个或多个其它组件。
在本公开文本中，除非另有明确的规定和限定，术语“连接”、“固定”、“设置”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本公开文本中的具体含义。
以上所述是本公开文本的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本公开文本所述原理的前提下，还可以作出若干改进和润饰，这些改进和润饰也应视为本公开文本的保护范围。

Claims (10)

  1. 一种应用于移动终端的NFC天线结构，包括：
    设置于主板上的馈源；
    NFC线圈；
    金属地板，其中所述NFC线圈的一部分固定于所述金属地板上，且所述NFC线圈的第一端与所述金属地板接触连接，第二端与主板上的地弹片接触连接；
    所述馈源与所述金属地板接触连接，所述馈源发出的信号电流通过所述金属地板传导至所述NFC线圈，所述NFC线圈的第一端与第二端之间形成导通电流。
  2. 根据权利要求1所述的NFC天线结构，其中，
    所述NFC天线结构包括缝隙，所述缝隙将所述金属地板分成第一部分和第二部分，所述NFC线圈包括设置于所述第一部分上的第一线圈部分，以及包括设置于所述第二部分上的第二线圈部分。
  3. 根据权利要求2所述的NFC天线结构，还包括：
    分别与所述第一部分和所述第二部分连接的短接线；
    其中，所述馈源与所述金属地板的接触点以及所述NFC线圈的第一端与所述金属地板的接触点分别处于所述金属地板相分离的两个部分；
    所述馈源发出的信号电流通过所述金属地板以及所述短接线传导至所述NFC线圈，所述NFC线圈的第一端与第二端之间形成导通电流。
  4. 根据权利要求2所述的NFC天线结构，其中，所述馈源与所述金属地板的接触点以及所述NFC线圈的第一端与所述金属地板的接触点位于所述金属地板的同一部分。
  5. 根据权利要求1所述的NFC天线结构，其中，所述NFC线圈的第二端与所述主板上的地弹片的接触点位于所述金属地板投影于所述主板的投影区域内。
  6. 根据权利要求1所述的NFC天线结构，其中，所述NFC线圈采用柔性电路板制成。
  7. 根据权利要求1所述的NFC天线结构，其中，所述NFC线圈采用印刷工艺或者LDS工艺制成于所述金属地板。
  8. 一种移动终端，包括如权利要求1至7任一项所述的NFC天线结构。
  9. 根据权利要求8所述的移动终端，其中，所述NFC天线结构的金属地板为印制电路板、所述移动终端的金属后盖或者所述移动终端的显示屏支架。
  10. 根据权利要求8所述的移动终端，其中，所述移动终端为手机或者平板电脑。
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