WO2019109630A1 - 天线组件及移动终端 - Google Patents

天线组件及移动终端 Download PDF

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Publication number
WO2019109630A1
WO2019109630A1 PCT/CN2018/093671 CN2018093671W WO2019109630A1 WO 2019109630 A1 WO2019109630 A1 WO 2019109630A1 CN 2018093671 W CN2018093671 W CN 2018093671W WO 2019109630 A1 WO2019109630 A1 WO 2019109630A1
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WO
WIPO (PCT)
Prior art keywords
antenna
nfc
coil
radiating section
capacitor
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Application number
PCT/CN2018/093671
Other languages
English (en)
French (fr)
Inventor
朱伟
李堃
王毅
卢士强
Original Assignee
华为技术有限公司
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.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201880057451.5A priority Critical patent/CN111052500B/zh
Publication of WO2019109630A1 publication Critical patent/WO2019109630A1/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
    • H01Q1/12—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
    • H01Q21/00—Antenna arrays or systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • 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 invention relates to the field of antenna technologies, and in particular, to an antenna assembly and a mobile terminal of a multi-antenna community.
  • NFC Near Field Communication
  • GSM Global System for Mobile Communications
  • WCDMA Wideband Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • the embodiment of the present application provides an antenna assembly, which designs an NFC antenna and other antennas as a common structure, and can effectively utilize space to ensure performance of each antenna.
  • the present application provides an antenna assembly, including: a first antenna, a second antenna, a first coil, and a first tuning component, the first antenna includes a first radiator segment, and the second antenna includes a first antenna a second radiant section, the first coil includes a first end, a second end, and a coil body connected between the first end and the second end and arranged in a plurality of turns, the first radiant section Electrically connected between the first end and the NFC feed circuit, the second radiating section is electrically connected between the second end and the ground, and two ends of the first tuning member are respectively connected to the first One end and the second end, the first radiating section, the first coil and the second radiating section together constitute an NFC antenna, and a parallel circuit composed of the first tuning member and the coil body is used for Isolating signals of the NFC antenna from signals of the first antenna and the second antenna.
  • the first coil is disposed between the first radiating section and the second radiating section to form an NFC antenna structure, and the coil body of the first coil is multi-turn wound to multiplex the space to enhance the strength of the NFC antenna signal.
  • the signals of the first antenna and the second antenna are not affected, that is, the performance of the NFC antenna is improved in a limited space by the arrangement of the coil body.
  • the parallel circuit formed by the first tuning member and the coil body can form isolation between the NFC antenna signal and the first antenna and the second antenna signal.
  • the first coil is a PCB coil or a wire wound inductor.
  • the number of turns of the first coil is proportional to the magnetic flux of the NFC signal, and the more the number of turns of the coil body, the larger the magnetic flux of the NFC signal.
  • the present application does not limit the shape, number of turns, and winding direction of the first coil.
  • the shape of the first coil winding may be rectangular, circular or other irregular shape.
  • the first tuning component is a first capacitor.
  • Forming a multi-antenna body of the NFC antenna and the first and second antennas by connecting the first capacitor in parallel with the first coil, and improving the signal strength of the NFC antenna, the parallel circuit formed by the first capacitor and the first coil is Conducive to saving the internal space of the mobile terminal, no complicated isolation circuit is required, and the cost is low.
  • the antenna assembly further includes a first lumped device serially coupled between the first end of the first coil and the first radiating segment, the first lumped device for constructing Resonant band stop, ensuring mutual isolation between the non-NFC signals of the first antenna and the second antenna, that is, ensuring that the signal of the first antenna cannot be transmitted to the second radiating segment, and also ensuring the second antenna The signal cannot be transmitted to the first radiating section, and the first lumped device forms a band-stop filter between the first antenna and the second antenna to ensure the performance of the first antenna and the second antenna.
  • the first lumped device includes a parallel circuit formed by a parallel connection of a second capacitor and a first inductor, one end of the parallel circuit being connected to the first radiating segment, and the other end of the parallel circuit Connected to the first end of the first coil.
  • a second inductor is connected in series between the NFC feed circuit and the first radiating segment, and the second inductor is used for a signal passing through the NFC antenna and blocks a non-NFC antenna signal.
  • the second inductor can also be replaced by a device having a similar function.
  • a second coil and a second tuning component are disposed between the NFC feeding circuit and the first radiating section, and two ends of the second coil are electrically connected to the NFC feeding circuit respectively And the first radiating section, the second tuning component and the second coil form a parallel circuit for forming a signal of the NFC antenna and a signal of the first antenna and the second antenna.
  • the magnetic flux brought by the second coil is increased by the arrangement of the second coil, and the performance of the NFC antenna is further improved.
  • the second tuning component is a sixth capacitor.
  • a second lumped device is further disposed between the NFC feed circuit and the first radiant segment, and the second lumped device includes a seventh capacitor and a third inductor connected in parallel, and a parallel circuit connected in series between the first radiating section and the second coil, the second lumped device for constructing a resonant band stop to ensure a signal between the first antenna and the second antenna Isolated from each other.
  • the first antenna further includes a first feeding branch electrically connected to the first radiating section, and includes a first feeding point and a series connection in the a third capacitance between the first feed point and the first radiant section, the third capacitance being used to filter out signals of the low frequency NFC antenna.
  • the first antenna further includes a first grounding branch, the first grounding branch is electrically connected to the first radiating section, and includes a series connection between the ground and the first radiating section And a fourth capacitor for filtering a signal of the low frequency NFC antenna.
  • the second antenna further includes a second feed branch electrically connected to the second radiating section, and includes a second feed point and connected in series a fifth capacitance between the second feed point and the second radiant section, the fifth capacitance being used to filter out signals of the low frequency NFC antenna.
  • the antenna assembly further includes a third antenna, a third coil, and a third tuning component
  • the third antenna includes a third radiating section, and two ends of the third coil are electrically connected to the first radiating And a third radiant section electrically connected between the third coil and the NFC feed circuit, and two ends of the third tuning component are respectively connected to the third coil
  • the parallel circuit formed by the third tuning component and the third coil is used to form a signal of the NFC antenna from the signals of the first antenna and the third antenna.
  • a third lumping device is further disposed between the third coil and the third radiant segment, and the third lumped device comprises a parallel connection of an eighth capacitor and a fourth inductor, and is connected in series a parallel circuit between the third radiating section and the third coil, the third lumped device for constructing a resonant band stop to ensure a signal between the first antenna and the third antenna Isolated from each other.
  • the NFC feed circuit includes an NFC chip and a balun, and an NFC feed point is disposed between the NFC feed circuit and the first radiant section, and the balun is electrically connected Between the NFC feed point and the NFC chip, the NFC chip is used to output a differential signal, and the balun is used to convert the differential signal into a single-ended signal.
  • the NFC feed circuit includes an NFC chip for outputting a differential signal
  • the NFC chip includes a first output end and a second output end
  • the NFC feed circuit and the An NFC feed point is provided between the first radiant sections
  • the first output is electrically connected to the NFC feed point
  • the second output is electrically connected to the second radiant section.
  • a fifth inductance is connected in series between the second output end and the second radiating section, and the fifth inductor is used for signals passing through the NFC antenna and blocks non-NFC antenna signals.
  • a ninth capacitor is connected in series between the second radiant section and the ground for filtering out a low frequency NFC signal, and the ninth capacitor and the fifth inductor are sequentially connected in series and the second Between the outputs.
  • the present application provides a mobile terminal, including the foregoing antenna component, where the antenna component is disposed in a casing of the mobile terminal, and the first radiating section and the second radiating section are the mobile terminal.
  • a metal frame or a metal structural member disposed inside the outer casing.
  • FIG. 1 is a schematic diagram of a mobile terminal provided with an antenna assembly according to an embodiment of the present application.
  • FIG. 2 is a schematic diagram of an antenna assembly provided by an embodiment of the present application.
  • FIG. 3 is an enlarged schematic view of the first coil and the first tuning member in the antenna assembly shown in FIG. 2.
  • FIG. 4 is a schematic diagram of an antenna assembly provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of an antenna assembly provided by an embodiment of the present application.
  • FIG. 6 is a schematic diagram of an antenna assembly provided by an embodiment of the present application.
  • FIG. 7 is a schematic diagram of an antenna assembly provided by an embodiment of the present application.
  • FIG. 8 is a schematic diagram of an antenna assembly provided by an embodiment of the present application.
  • the antenna assembly 100 provided by the present application is applied in the mobile terminal 200.
  • the position within the dotted line frame is the position at which the antenna assembly 100 is disposed in the mobile terminal 200.
  • the mobile terminal 100 can be a terminal product such as a mobile phone or a tablet.
  • the antenna assembly 100 can be disposed at the top of the mobile terminal 200 or at other locations.
  • the present application does not limit the specific location of the antenna assembly 100 in the mobile terminal.
  • an antenna assembly 100 includes a first antenna 10, a second antenna 20, a first coil 30, and a first tuning component 40.
  • the first antenna 10 includes a first a radiator segment 11
  • the second antenna 20 includes a second radiating section 21, the first coil 30 including a first end 31, a second end 33, and a first end 31 and a second end 33 connected thereto
  • the coil body 32 is disposed in a plurality of turns, and the first radiating section 11 is electrically connected between the first end 31 and the NFC feed circuit FN, and the second radiating section 21 is electrically connected between the second end 33 and the ground G, the ground G may be the ground on the main board in the mobile terminal 200, or the metal bracket or the metal casing in the mobile terminal 200 may be used as the ground.
  • the parallel circuit formed by the first tuning member 40 and the coil body 32 is used to form a signal of the NFC antenna from the signals of the first antenna 10 and the second antenna 20.
  • the antenna assembly 100 is disposed in the outer casing of the mobile terminal 200, and a gap is disposed between the first radiating section 11 and the second radiating section 21, and the first radiating section 11 and the second radiating section 21 are A metal frame of the mobile terminal 200 or a metal structural member disposed inside the casing.
  • the working frequency bands of the first antenna 10 and the second antenna 20 may be: 700 MHz to 960 MHz, and 1.71 GHz to 2.69 GHz.
  • the first antenna 10 and the second antenna 20 may include a Long Term Evolution (LTE) band, for example, 704 MHz-716 MHz, 1700 MHz-1755 MHz, 1850 MHz-1900 MHz, Global System for Mobile Communications (GSM) band
  • LTE Long Term Evolution
  • GSM Global System for Mobile Communications
  • WCDMA Wideband Code Division Multiple Access
  • 1920 MHz-1980 MHz, etc. may also include a frequency band that implements a GPS function.
  • the first coil 30 is disposed between the first radiating section 11 and the second radiating section 21 to form an NFC antenna structure, and the coil body 32 of the first coil 30 is wound in multiple turns, and can be in the same position.
  • the multi-turn current is generated, so that the coil body 32 multiplexes the space and the magnetic flux increases, and the strength of the NFC antenna signal can be improved without affecting the signals of the first antenna and the second antenna.
  • the parallel circuit formed by the first tuning member 40 and the coil body 32 can form an isolation between the NFC antenna signal and the signals of the first antenna 10 and the second antenna 20.
  • the first coil 30 is a PCB coil or a wire wound inductor.
  • the number of turns of the coil body 32 of the first coil 30 is proportional to the magnetic flux of the NFC signal, and the more the coil body 32 is wound, the larger the magnetic flux of the NFC signal.
  • the present application does not limit the shape, the number of turns, and the winding direction of the first coil 30.
  • the shape in which the first coil 30 is wound may be rectangular, circular or other irregular shape.
  • the first tuning component 40 is a first capacitor C1.
  • the first capacitor C1 has the advantages of simple structure and low cost as a tuning component, and does not need to provide a complicated tuning circuit.
  • the parallel circuit formed by the first capacitor C1 and the first coil 30 is beneficial for saving the internal space of the mobile terminal, and does not require complicated isolation circuits. And has the advantage of low cost.
  • the antenna assembly further includes a first lumped device 50 connected in series between the first end 31 of the first coil 30 and the first radiating segment 11, the first lumped The device 50 is configured to construct a resonant band stop to ensure mutual isolation between the non-NFC signals of the first antenna 10 and the second antenna 20, that is, to ensure that the signal of the first antenna 10 cannot be transmitted to the second radiant section 21, Similarly, it can be ensured that the signal of the second antenna 20 cannot be transmitted to the first radiating section 11, and the first lumped device 50 forms a band-stop filter between the first antenna 10 and the second antenna 20 to ensure the first antenna 10 and the first antenna The performance of the two antennas 20.
  • the first lumped device 50 includes a parallel circuit formed by a parallel connection of a second capacitor C2 and a first inductor L1, one end of the parallel circuit being connected to the first radiating section 11, the parallel The other end of the circuit is connected to the first end 31 of the first coil 30.
  • a second inductor L2 is connected in series between the NFC feed circuit FN and the first radiating segment 11, and the second inductor L2 is used to pass signals of the NFC antenna. And block non-NFC antenna signals.
  • the first antenna 10 further includes a first feeding branch F1, the first feeding branch F1 is electrically connected to the first radiating section 11 and includes a first feeding point 12 And a third capacitor C3 connected in series between the first feed point 12 and the first radiating section 11, the third capacitor C3 for filtering out signals of the low frequency NFC antenna.
  • the first antenna 10 further includes a first ground branch G1, the first ground branch G1 is electrically connected to the first radiating section 11, and includes a series connection and the first A fourth capacitor C4 between the radiating segments 11 for filtering out signals of the low frequency NFC antenna.
  • the second antenna 20 further includes a second feeding branch F2, the second feeding branch F2 is electrically connected to the second radiating section 21, and includes a second feeding point 22 And a fifth capacitor C5 connected in series between the second feed point 22 and the second radiating section 21, the fifth capacitor C5 is for filtering out the signal of the low frequency NFC antenna.
  • the first feeding branch F1, the second feeding branch F2, and the first grounding branch G1 may be disposed on a circuit board in the mobile terminal, the first coil 30, the first tuning member 40, and the first The lumped device 50 can be placed on a separate circuit board within the mobile terminal.
  • the signal return path of the NFC antenna is: the signal flows out from the NFC feed circuit FN, and sequentially passes through the second inductor L2, the first radiating section 11, the first lumped device 50, the first coil 30, and the second radiation.
  • the segment 21 eventually flows to the ground of the second radiating section 21.
  • the signal low-frequency return path of the first antenna 10 is: the signal flows from the first feeding point 12 of the first feeding branch F1 to the third capacitor C3, passes through the third capacitor C3, and sequentially passes through the first radiating section 11 and the fourth capacitor. C4 eventually flows to the ground of the first ground branch G1.
  • the signal low-frequency return path of the second antenna 20 is: the signal flows from the second feeding point 22 of the second feeding branch F2 to the fifth capacitor C5, passes through the fifth capacitor C5, passes through the second radiating section 21, and flows to the second The grounding end of the radiating section 21.
  • the first antenna and the second antenna of the non-NFC antenna there are various current paths, and only the low frequency return path is described in the present embodiment.
  • a second coil 30a and a second tuning member 40a are disposed between the NFC feed circuit FN and the first radiating section 11. Two ends of the second coil 30a are electrically connected to the NFC feed circuit FN and the first radiating section 11, respectively, and the second tuning component 40a and the second coil 30a form a parallel circuit for forming
  • the signal of the NFC antenna is isolated from the signals of the first antenna 10 and the second antenna 20.
  • the structure of the second coil 30a can be the same as that of the first coil 30, and the second tuning member 40a The structure may be the same as that of the first tuning member 40.
  • the second tuning component 40a is a sixth capacitor C6.
  • a second lumping device 50a is further disposed between the NFC feed circuit FN and the first radiating segment 11, and the second lumping device 50a includes a seventh capacitor C7 and a third
  • the inductor L3 is configured in parallel, and is connected in parallel between the first radiating section 11 and the second coil 30a, and the second lumping device 50a is configured to construct a resonant band stop to ensure the non-first antenna 10
  • the NFC signal is isolated from the NFC signal.
  • the antenna assembly further includes a third antenna 60, a third coil 30b, and a third tuning component 40b.
  • the third antenna 60 includes a third radiating section 61, and the third coil 30b The two ends are respectively electrically connected to the first radiating section 11 and the third radiating section 61, and the third radiating section 61 is electrically connected between the third coil 30b and the NFC feeding circuit FN.
  • the two ends of the third tuning member 40b are respectively connected to the two ends of the third coil 30b, and the parallel circuit formed by the third tuning member 40b and the third coil 30b is used to form the signal of the NFC antenna. Isolation of signals of the first antenna 10 and the third antenna 60.
  • the first radiating section 11, the second radiating section 21 and the third radiating section 61 are all part of the metal frame of the mobile terminal, and the first radiating section 11 and the second radiating section 21 are separated by a gap, A radiant section 11 and a third radiant section 61 are also isolated by a gap.
  • the first radiating section 11 is disposed on the short side of the top of the mobile terminal, and the second radiating section 21 and the third radiating section 61 extend from the two sides of the first radiating section 11 to two respectively. Long side.
  • a third lumping device 50b is further disposed between the third coil 30b and the third radiating segment 61, and the third lumping device 50b includes an eighth capacitor C8 and a fourth inductor.
  • L4 is formed in parallel, and is connected in parallel between the third radiating section 61 and the third coil 30b, and the third concentrator 50b is used to construct a resonant band stop to ensure the first antenna 10 The mutual isolation from the non-NFC signal of the third antenna 60.
  • the third radiating section 61 and the NFC feed circuit FN are connected in series with an inductive component, and the inductive component functions in the same manner as the second inductor L2 in FIGS. 4 and 5 for The signal of the NFC antenna is described, and the non-NFC antenna signal is blocked.
  • the NFC feed circuit FN includes an NFC chip 91 and a balun 92, and an NFC feed point is disposed between the NFC feed circuit FN and the first radiating section 11. 93.
  • the balun 92 is electrically connected between the NFC feed point 93 and the NFC chip 91.
  • the NFC chip 91 is configured to output a differential signal, and the balun 92 is used to convert the differential signal.
  • the single-ended signal is fed from the NFC feed point 93 and further flows into the first radiant section 11.
  • a filter circuit 94 or other isolation device is further disposed between the NFC chip 91 and the balun 92.
  • the filter circuit 94 is a low-pass filter circuit for filtering high-order harmonics of the transmitted signal.
  • a matching circuit 95 is also provided between the balun 92 and the NFC feed point 93. The matching circuit 95 is used to match the impedance of the antenna and the 92 port of the balun to obtain a better transmission power of the antenna.
  • the device that converts the differential signal outputted by the NFC chip 91 into a single-ended signal is not limited to the balun 92, and can be replaced with other devices having the same function, for example, a double-ended signal is constructed by a lumped device.
  • a circuit that converts to a single-ended signal is not limited to the balun 92, and can be replaced with other devices having the same function, for example, a double-ended signal is constructed by a lumped device.
  • a circuit that converts to a single-ended signal is not limited to the balun 92, and can be replaced with other devices having the same function, for example, a double-ended signal is constructed by a lumped device.
  • the NFC feed circuit FN includes an NFC chip 91 for outputting a differential signal, and the NFC chip 91 includes a first output end 97 and a second output end 98 .
  • An NFC feed point 93 is disposed between the NFC feed circuit FN and the first radiating section 11, and the first output end 97 is electrically connected to the NFC feed point 93, and the second output end 98 is electrically connected to the second radiant section 21.
  • a second inductor L2 is connected in series between the NFC feed point 93 and the first radiating section 11, and the first antenna 10 includes a first feed branch F1 and a first ground branch G1, and its structure is the same as that of FIG.
  • the embodiment shown in Figure 5 has the same architecture.
  • the second antenna 20 includes a second feed branch F2 having the same architecture as the embodiment of the embodiment shown in FIGS. 4 and 5.
  • a parallel circuit formed by the first coil 30 and the first tuning member 40 and a first lumped device 50 between the first radiating section 11 of the first antenna 10 and the second radiating section 21 of the second antenna 20, the specific structure and the diagram 4 is the same as the embodiment of the embodiment shown in FIG.
  • a fifth inductor L5 is connected in series between the second output terminal 98 and the second radiating segment 21, and the fifth inductor L5 is used to pass signals of the NFC antenna and block non-NFC antennas. signal.
  • a ninth capacitor C9 is connected in series between the second radiant section 21 and the ground, and a ninth capacitor C9 is used to filter out the low frequency NFC signal, and the ninth capacitor C9 and the fifth inductor L5 are sequentially Connected in series between ground and the second output 98.
  • the first antenna 10 and the second antenna 20 described in the embodiments of the present application may be a loop type antenna, an IFA type antenna, a slot antenna, a CRLH (composite right/left handed (CRLH) composite right and left hand) type antenna, or the like.
  • CRLH composite right/left handed (CRLH) composite right and left hand

Abstract

本申请涉及一种天线组件，包括第一天线、第二天线、第一线圈和第一调谐件，第一天线包括第一辐射体段，第二天线包括第二辐射段，第一线圈包括第一端、第二端及呈多圈卷绕设置的线圈体，第一辐射段电连接在第一端和NFC馈电电路之间，第二辐射段电连接在第二端和地之间，第一调谐件的两端分别连接至第一端和第二端，第一辐射段、第一线圈和第二辐射段共同构成NFC天线，第一调谐件与线圈体构成的并联电路用于形成NFC天线的信号与第一天线及第二天线的信号的隔离。本申请还提供一种移动终端。本申请实现了NFC天线与多天线共体且能够复用移动终端内部空间，提升NFC天线信号强度。

Description

天线组件及移动终端 技术领域
本发明涉及天线技术领域，特别涉及多天线共体的天线组件及移动终端。
背景技术
随着近距离非接触式通信技术的发展和应用，NFC(Near field communication，近场通信)功能逐渐成了众多终端产品的标准配置。通常将普通的NFC天线设置在终端内部，以实现NFC功能。然而，随着终端产品的功能需要的增加，需要在其内部设置多种类型的天线，例如：用于实现全球移动通信系统(Global System for Mobile Communications,GSM)频带的天线、用于实现宽带码分多址(Wideband Code Division Multiple Access,WCDMA)频带的天线、用于实现GPS功能的频段的天线等。若将各类型天线彼此独立设置在终端内，必定会因终端内部空间有限，导致天线性能受损。
如何设计NFC天线与其它天线形成多天线共体架构的同时，能够有效利用空间，且保证各天线性能，为业界研究的方向。
发明内容
本申请实施例提供一种天线组件，将NFC天线和其它的天线设计为共体架构，且能够有效利用空间，保证各天线性能。
第一方面，本申请提供一种天线组件，包括：第一天线、第二天线、第一线圈和第一调谐件，所述第一天线包括第一辐射体段，所述第二天线包括第二辐射段，所述第一线圈包括第一端、第二端及连接在所述第一端和所述第二端之间且呈多圈卷绕设置的线圈体，所述第一辐射段电连接在所述第一端和NFC馈电电路之间，所述第二辐射段电连接在所述第二端和地之间，所述第一调谐件的两端分别连接至所述第一端和所述第二端，所述第一辐射段、所述第一线圈和所述第二辐射段共同构成NFC天线，所述第一调谐件与所述线圈体构成的并联电路用于形成所述NFC天线的信号与所述第一天线及所述第二天线的信号的隔离。
本申请实施例通过设置第一线圈在第一辐射段和第二辐射段之间，构成NFC天线架构，且第一线圈的多圈卷绕设置的线圈体能复用空间，提升NFC天线信号的强度，同时不影响第一天线和第二天线的信号，即通过线圈体的设置，在有限的空间内，使得NFC天线性能得到提升。通过第一调谐件和线圈体构成的并联电路能够形成NFC天线信号与第一天线及第二天线信号之间的隔离。
一种实施方式中，所述第一线圈为PCB线圈或绕线电感。第一线圈的匝数与NFC信号的磁通量成正比，线圈体卷绕圈数越多，NFC信号磁通量越大。本申请不限定第一线圈的形状、匝数及绕线方向。第一线圈缠绕的形状可以为矩形、圆形或其它不规则形状。
具体而言，所述第一调谐件为第一电容。通过将第一电容与第一线圈并联的方式，形成NFC天线和第一、第二天线的多天线共体，且能够提升NFC天线信号强度，第一电容和第一线圈的形成的并联电路有利于节约移动终端内部空间，不需要复杂的隔离电路，且具 成本低的优势。
一种实施方式中，天线组件还包括串接在所述第一线圈的所述第一端和所述第一辐射段之间的第一集总器件，所述第一集总器件用于构造谐振带阻，保证所述第一天线和所述第二天线的非NFC信号之间的相互隔离，即保证第一天线的信号无法传送至第二辐射段，同样，也能保证第二天线的信号无法传送至第一辐射段，第一集总器件在第一天线和第二天线之间形成带阻滤波，保证第一天线和第二天线的性能。
一种实施方式中，所述第一集总器件包括由第二电容和第一电感并联形成的并联电路，所述并联电路的一端连接至所述第一辐射段，所述并联电路的另一端连接至所述第一线圈的所述第一端。
一种实施方式中，所述NFC馈电电路和所述第一辐射段之间串接第二电感，所述第二电感用于通过所述NFC天线的信号，且阻止非NFC天线信号。第二电感也可以用具有相似功能的器件代替。
一种实施方式中，所述NFC馈电电路和所述第一辐射段之间设有第二线圈和第二调谐件，所述第二线圈的两端分别电连接至所述NFC馈电电路和所述第一辐射段，所述第二调谐件与所述第二线圈构成并联电路，用于形成所述NFC天线的信号与所述第一天线及所述第二天线的信号的隔离。本实施方式通过第二线圈的设置，增加了第二线圈带来的磁通量，进一步提升了NFC天线的性能。
一种实施方式中，所述第二调谐件为第六电容。
一种实施方式中，所述NFC馈电电路和所述第一辐射段之间还设有第二集总器件，所述第二集总器件包括由第七电容和第三电感并联构成，且串联在所述第一辐射段和所述第二线圈之间的并联电路，所述第二集总器件用于构造谐振带阻，保证所述第一天线和所述第二天线的信号之间的相互隔离。
一种实施方式中，所述第一天线还包括第一馈电支路，所述第一馈电支路电连接至所述第一辐射段，且包括第一馈电点和串联在所述第一馈电点和所述第一辐射段之间的第三电容，所述第三电容用于滤除低频的所述NFC天线的信号。
一种实施方式中，所述第一天线还包括第一接地支路，所述第一接地支路电连接至所述第一辐射段，且包括串联在地和所述第一辐射段之间的第四电容，所述第四电容用于滤除低频的所述NFC天线的信号。
一种实施方式中，所述第二天线还包括第二馈电支路，所述第二馈电支路电连接至所述第二辐射段，且包括第二馈电点和串联在所述第二馈电点和所述第二辐射段之间的第五电容，所述第五电容用于滤除低频的所述NFC天线的信号。
一种实施方式中，天线组件还包括第三天线、第三线圈和第三调谐件，所述第三天线包括第三辐射段，所述第三线圈的两端分别电连接所述第一辐射段和所述第三辐射段，所述第三辐射段电连接在所述第三线圈和所述NFC馈电电路之间，所述第三调谐件的两端分别连接至所述第三线圈的两端，所述第三调谐件和所述第三线圈构成的并联电路用于形成所述NFC天线的信号与所述第一天线及所述第三天线的信号的隔离。
一种实施方式中，所述第三线圈和所述第三辐射段之间还设有第三集总器件，所述第三集总器件包括由第八电容和第四电感并联构成，且串联在所述第三辐射段和所述第三线 圈之间的并联电路，所述第三集总器件用于构造谐振带阻，保证所述第一天线和所述第三天线的信号之间的相互隔离。
一种实施方式中，所述NFC馈电电路包括NFC芯片和巴伦，所述NFC馈电电路和所述第一辐射段之间设有NFC馈电点，所述巴伦电连接在所述NFC馈电点和所述NFC芯片之间，所述NFC芯片用于输出差分信号，所述巴伦用于将所述差分信号转换为单端信号。
一种实施方式中，所述NFC馈电电路包括NFC芯片，所述NFC芯片用于输出差分信号，所述NFC芯片包括第一输出端和第二输出端，所述NFC馈电电路和所述第一辐射段之间设有NFC馈电点，所述第一输出端电连接至所述NFC馈电点，所述第二输出端电连接至所述第二辐射段。
一种实施方式中，所述第二输出端和所述第二辐射段之间串联第五电感，所述第五电感用于通过所述NFC天线的信号，且阻止非NFC天线信号。
一种实施方式中，所述第二辐射段和地之间串联第九电容，用于滤除低频的NFC信号，所述第九电容和所述第五电感依次串联在地和所述第二输出端之间。
第二方面，本申请提供一种移动终端，包括前述天线组件，所述天线组件设于所述移动终端的外壳内，所述第一辐射段和所述第二辐射段为所述移动终端的金属边框或者设于所述外壳内部的金属结构件。
附图说明
图1是本申请一种实施方式提供的设有天线组件的移动终端的示意图。
图2是本申请一种实施方式提供的天线组件的示意图。
图3是图2所示的天线组件中的第一线圈及第一调谐件的放大示意图。
图4是本申请一种实施方式提供的天线组件的示意图。
图5是本申请一种实施方式提供的天线组件的示意图。
图6是本申请一种实施方式提供的天线组件的示意图。
图7是本申请一种实施方式提供的天线组件的示意图。
图8是本申请一种实施方式提供的天线组件的示意图。
具体实施方式
下面结合附图，对本发明的实施例进行描述。
本申请提供的天线组件100应用在移动终端200内，图1所代表的实施例中，虚线框内的位置就是移动终端200中设置天线组件100的位置。移动终端100可以为手机、平板等终端产品。天线组件100可以设置在移动终端200的顶端，也可以设置在其它位置，本申请不限定天线组件100在移动终端中的具体位置。
请参阅图2和图3，本申请一种实施方式提供的天线组件100包括第一天线10、第二天线20、第一线圈30和第一调谐件40，所述第一天线10包括第一辐射体段11，所述第二天线20包括第二辐射段21，所述第一线圈30包括第一端31、第二端33及连接在所述第一端31和所述第二端33之间且呈多圈卷绕设置的线圈体32，所述第一辐射段11电连接在所述第一端31和NFC馈电电路FN之间，所述第二辐射段21电连接在所述第二端33 和地G之间，地G可以为移动终端200内主板上的地，也可以将移动终端200内金属支架或金属壳体作为地。
所述第一调谐件40的两端分别连接至所述第一端31和所述第二端33，所述第一辐射段11、所述第一线圈30和所述第二辐射段21共同构成NFC天线，图1所示的实施例子中，其中带箭头的虚线延伸形成的路径为NFC天线的电流路径。所述第一调谐件40与所述线圈体32构成的并联电路用于形成所述NFC天线的信号与所述第一天线10及所述第二天线20的信号的隔离。
所述天线组件100设于所述移动终端200的外壳内，第一辐射段11和第二辐射段21之间设有间隙，所述第一辐射段11和所述第二辐射段21为所述移动终端200的金属边框或者设于所述外壳内部的金属结构件。第一天线10和第二天线20的工作频段可以为：700MHz～960MHz，1.71GHz～2.69GHz。第一天线10和第二天线20可以包括长期演进(Long Term Evolution,LTE)频带，例如：704MHz-716MHz,1700MHz-1755MHz,1850MHz-1900MHz、全球移动通信系统(Global System for Mobile Communications,GSM)频带，例如，824MHz-849MHz、宽带码分多址(Wideband Code Division Multiple Access,WCDMA)频带，例如，1920MHz-1980MHz等，也可以包括实现GPS功能的频段。
本申请实施例通过设置第一线圈30在第一辐射段11和第二辐射段21之间，构成NFC天线架构，且第一线圈30的线圈体32呈多圈卷绕设置，能够在同一位置产生多圈的电流，使得线圈体32复用空间且磁通量增加，可以提升NFC天线信号的强度，同时不影响第一天线和第二天线的信号。通过第一调谐件40和线圈体32构成的并联电路能够形成NFC天线信号与第一天线10及第二天线20信号之间的隔离。
一种实施方式中，所述第一线圈30为PCB线圈或绕线电感。第一线圈30之线圈体32的匝数与NFC信号的磁通量成正比，线圈体32卷绕圈数越多，NFC信号磁通量越大。本申请不限定第一线圈30的形状、匝数及绕线方向。第一线圈30缠绕的形状可以为矩形、圆形或其它不规则形状。
具体而言，所述第一调谐件40为第一电容C1。第一电容C1作为调谐件具有结构简单成本低的优势，不需要设置复杂的调谐电路，第一电容C1和第一线圈30形成的并联电路有利于节约移动终端内部空间，不需要复杂的隔离电路，且具成本低的优势。
一种实施方式中，天线组件还包括串接在所述第一线圈30的所述第一端31和所述第一辐射段11之间的第一集总器件50，所述第一集总器件50用于构造谐振带阻，保证所述第一天线10和所述第二天线20的非NFC信号之间的相互隔离，即保证第一天线10的信号无法传送至第二辐射段21，同样，也能保证第二天线20的信号无法传送至第一辐射段11，第一集总器件50在第一天线10和第二天线20之间形成带阻滤波，保证第一天线10和第二天线20的性能。
一种实施方式中，所述第一集总器件50包括由第二电容C2和第一电感L1并联形成的并联电路，所述并联电路的一端连接至所述第一辐射段11，所述并联电路的另一端连接至所述第一线圈30的所述第一端31。
请参阅图4，一种实施方式中，所述NFC馈电电路FN和所述第一辐射段11之间串接第二电感L2，所述第二电感L2用于通过所述NFC天线的信号，且阻止非NFC天线信号。
一种实施方式中，所述第一天线10还包括第一馈电支路F1，所述第一馈电支路F1电连接至所述第一辐射段11，且包括第一馈电点12和串联在所述第一馈电点12和所述第一辐射段11之间的第三电容C3，所述第三电容C3用于滤除低频的所述NFC天线的信号。
一种实施方式中，所述第一天线10还包括第一接地支路G1，所述第一接地支路G1电连接至所述第一辐射段11，且包括串联在地和所述第一辐射段11之间的第四电容C4，所述第四电容C4用于滤除低频的所述NFC天线的信号。
一种实施方式中，所述第二天线20还包括第二馈电支路F2，所述第二馈电支路F2电连接至所述第二辐射段21，且包括第二馈电点22和串联在所述第二馈电点22和所述第二辐射段21之间的第五电容C5，所述第五电容C5用于滤除低频的所述NFC天线的信号。
具体而言，第一馈电支路F1、第二馈电支路F2、第一接地支路G1可以设置在移动终端内的电路板上，第一线圈30、第一调谐件40和第一集总器件50可以设置在移动终端内单独的一块电路板上。
请参阅图5，NFC天线的信号回流路径为:信号从NFC馈电电路FN流出，依次经过第二电感L2、第一辐射段11、第一集总器件50、第一线圈30、第二辐射段21，最终流向第二辐射段21的接地端。第一天线10的信号低频回流路径为：信号从第一馈电支路F1的第一馈电点12流向第三电容C3，经过第三电容C3后，依次经过第一辐射段11第四电容C4,最终流向第一接地支路G1的地。第二天线20的信号低频回流路径为：信号从第二馈电支路F2的第二馈电点22流向第五电容C5，经过第五电容C5后，经过第二辐射段21，流向第二辐射段21的接地端。具体而言，作为非NFC天线的第一天线和第二天线，具有多种电流路径，本实施方式中只描述了低频回流路径。
请参阅图6，一种实施方式中，所述NFC馈电电路FN和所述第一辐射段11之间设有第二线圈30a和第二调谐件40a。所述第二线圈30a的两端分别电连接至所述NFC馈电电路FN和所述第一辐射段11，所述第二调谐件40a与所述第二线圈30a构成并联电路，用于形成所述NFC天线的信号与所述第一天线10及所述第二天线20的信号的隔离。本实施方式通过第二线圈30a的设置，增加了第二线圈30a带来的磁通量，进一步提升了NFC天线的性能，第二线圈30a的结构可以与第一线圈30相同,第二调谐件40a的结构可以与第一调谐件40的结构相同。
一种实施方式中，所述第二调谐件40a为第六电容C6。
一种实施方式中，所述NFC馈电电路FN和所述第一辐射段11之间还设有第二集总器件50a，所述第二集总器件50a包括由第七电容C7和第三电感L3并联构成，且串联在所述第一辐射段11和所述第二线圈30a之间的并联电路，所述第二集总器件50a用于构造谐振带阻，保证第一天线10的非NFC信号与NFC信号相互隔离。
请参阅图7，一种实施方式中，天线组件还包括第三天线60、第三线圈30b和第三调谐件40b，所述第三天线60包括第三辐射段61，所述第三线圈30b的两端分别电连接所述第一辐射段11和所述第三辐射段61，所述第三辐射段61电连接在所述第三线圈30b和所述NFC馈电电路FN之间，所述第三调谐件40b的两端分别连接至所述第三线圈30b的两端，所述第三调谐件40b和所述第三线圈30b构成的并联电路用于形成所述NFC天线的信号与所述第一天线10及所述第三天线60的信号的隔离。
一种实施方式中，第一辐射段11、第二辐射段21和第三辐射段61均为移动终端金属边框的一部分，第一辐射段11和第二辐射段21之间通过间隙隔离，第一辐射段11和第三辐射段61之间亦通过间隙隔离。具体而言，以移动终端为手机为例，第一辐射段11设置在移动终端顶部短边上，第二辐射段21和第三辐射段61从第一辐射段11的两侧分别延伸至两个长边。
一种实施方式中，所述第三线圈30b和所述第三辐射段61之间还设有第三集总器件50b，所述第三集总器件50b包括由第八电容C8和第四电感L4并联构成，且串联在所述第三辐射段61和所述第三线圈30b之间的并联电路，所述第三集总器50b件用于构造谐振带阻，保证所述第一天线10和所述第三天线60的非NFC信号之间的相互隔离。
图7所示的实施例中，第三辐射段61和NFC馈电电路FN串联一电感元件，此电感元件的作用与图4和图5中的第二电感L2的作用相同，用于通过所述NFC天线的信号，且阻止非NFC天线信号。
请参阅图5，一种实施方式中，所述NFC馈电电路FN包括NFC芯片91和巴伦92，所述NFC馈电电路FN和所述第一辐射段11之间设有NFC馈电点93，所述巴伦92电连接在所述NFC馈电点93和所述NFC芯片91之间，所述NFC芯片91用于输出差分信号，所述巴伦92用于将所述差分信号转换为单端信号,所述单端信号从NFC馈电点93馈入，进一步流入第一辐射段11。本实施方式中，NFC芯片91和巴伦92之间还设有滤波电路94或其它隔离器件，滤波电路94为低通滤波电路，作用是滤除发射信号的高次谐波。巴伦92和NFC馈电点93之间还设有匹配电路95，所述匹配电路95用于匹配天线和巴伦92口的阻抗，使天线获得较好的发射功率。
具体而言，将NFC芯片91所输出的差分信呈转换为单端信号的器件不局限于巴伦92，还可以使用具有相同功能的其它器件替代，例如：通过集总器件构造具有双端信号转换为单端信号的电路。
一种实施方式中，请参阅图8，所述NFC馈电电路FN包括NFC芯片91，所述NFC芯片用于输出差分信号，所述NFC芯片91包括第一输出端97和第二输出端98，所述NFC馈电电路FN和所述第一辐射段11之间设有NFC馈电点93，所述第一输出端97电连接至所述NFC馈电点93，所述第二输出端98电连接至所述第二辐射段21。
本实施方式中，NFC馈电点93与第一辐射段11之间串联第二电感L2，第一天线10包括第一馈电支路F1和第一接地支路G1，其架构与图4和图5所示的实施例子架构相同。第二天线20包括第二馈电支路F2，其架构与图4和图5所示的实施例子架构相同。第一天线10的第一辐射段11和第二天线20的第二辐射段21之间串联第一线圈30和第一调谐件40形成的并联电路及第一集总器件50，具体架构与图4和图5所示的实施例子架构相同。
一种实施方式中，所述第二输出端98和所述第二辐射段21之间串联第五电感L5，所述第五电感L5用于通过所述NFC天线的信号，且阻止非NFC天线信号。
一种实施方式中，所述第二辐射段21和地之间串联第九电容C9，第九电容C9用于滤除低频的NFC信号，所述第九电容C9和所述第五电感L5依次串联在地和所述第二输出端98之间。
本申请各实施例中所述的第一天线10和第二天线20可以为Loop型天线、IFA型天线、缝隙天线、CRLH(composite right/left handed(CRLH)复合左右手)型天线等。
以上对本申请实施例所提供的一种天线组件和移动终端进行了详细介绍，本文中应用了具体个例对本申请的原理及实施例进行了阐述，以上实施例的说明只是用于帮助理解本申请的方法及其核心思想；同时，对于本领域的一般技术人员，依据本申请的思想，在具体实施例及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本申请的限制。

Claims (19)

  1. 一种天线组件，其特征在于，包括：第一天线、第二天线、第一线圈和第一调谐件，所述第一天线包括第一辐射体段，所述第二天线包括第二辐射段，所述第一线圈包括第一端、第二端及连接在所述第一端和所述第二端之间且呈多圈卷绕设置的线圈体，所述第一辐射段电连接在所述第一端和NFC馈电电路之间，所述第二辐射段电连接在所述第二端和地之间，所述第一调谐件的两端分别连接至所述第一端和所述第二端，所述第一辐射段、所述第一线圈和所述第二辐射段共同构成NFC天线，所述第一调谐件与所述线圈体构成的并联电路用于形成所述NFC天线的信号与所述第一天线及所述第二天线的信号的隔离。
  2. 如权利要求1所述的天线组件，其特征在于，所述第一线圈为PCB线圈或绕线电感。
  3. 如权利要求1或2所述的天线组件，其特征在于，所述第一调谐件为第一电容。
  4. 如权利要求1至3任一项所述的天线组件，其特征在于，还包括串接在所述第一线圈的所述第一端和所述第一辐射段之间的第一集总器件，所述第一集总器件用于构造谐振带阻，保证所述第一天线和所述第二天线的非NFC信号之间的相互隔离。
  5. 如权利要求4所述的天线组件，其特征在于，所述第一集总器件包括由第二电容和第一电感并联形成的并联电路，所述并联电路的一端连接至所述第一辐射段，所述并联电路的另一端连接至所述第一线圈的所述第一端。
  6. 如权利要求1至5任一项所述的天线组件，其特征在于，所述NFC馈电电路和所述第一辐射段之间串接第二电感，所述第二电感用于通过所述NFC天线的信号，且阻止非NFC天线信号。
  7. 如权利要求1至5任一项所述的天线组件，其特征在于，所述NFC馈电电路和所述第一辐射段之间设有第二线圈和第二调谐件，所述第二线圈的两端分别电连接至所述NFC馈电电路和所述第一辐射段，所述第二调谐件与所述第二线圈构成并联电路，用于形成所述NFC天线的信号与所述第一天线及所述第二天线的信号的隔离。
  8. 如权利要求7所述的天线组件，其特征在于，所述第二调谐件为第六电容。
  9. 如权利要求7或8所述的天线组件，其特征在于，所述NFC馈电电路和所述第一辐射段之间还设有第二集总器件，所述第二集总器件包括由第七电容和第三电感并联构成，且串联在所述第一辐射段和所述第二线圈之间的并联电路，所述第二集总器件用于构造谐振带阻，保证所述第一天线和所述第二天线的信号之间的相互隔离。
  10. 如权利要求1至9任一项所述的天线组件，其特征在于，所述第一天线还包括第一馈电支路，所述第一馈电支路电连接至所述第一辐射段，且包括第一馈电点和串联在所述第一馈电点和所述第一辐射段之间的第三电容，所述第三电容用于滤除低频的所述NFC天线的信号。
  11. 如权利要求1至10任一项所述的天线组件，其特征在于，所述第一天线还包括第一接地支路，所述第一接地支路电连接至所述第一辐射段，且包括串联在地和所述第一辐射段之间的第四电容，所述第四电容用于滤除低频的所述NFC天线的信号。
  12. 如权利要求1至11任一项所述的天线组件，其特征在于，所述第二天线还包括第二馈电支路，所述第二馈电支路电连接至所述第二辐射段，且包括第二馈电点和串联在所述第 二馈电点和所述第二辐射段之间的第五电容，所述第五电容用于滤除低频的所述NFC天线的信号。
  13. 如权利要求1至5任一项所述的天线组件，其特征在于，还包括第三天线、第三线圈和第三调谐件，所述第三天线包括第三辐射段，所述第三线圈的两端分别电连接所述第一辐射段和所述第三辐射段，所述第三辐射段电连接在所述第三线圈和所述NFC馈电电路之间，所述第三调谐件的两端分别连接至所述第三线圈的两端，所述第三调谐件和所述第三线圈构成的并联电路用于形成所述NFC天线的信号与所述第一天线及所述第三天线的信号的隔离。
  14. 如权利要求13所述的天线组件，其特征在于，所述第三线圈和所述第三辐射段之间还设有第三集总器件，所述第三集总器件包括由第八电容和第四电感并联构成，且串联在所述第三辐射段和所述第三线圈之间的并联电路，所述第三集总器件用于构造谐振带阻，保证所述第一天线和所述第三天线的信号之间的相互隔离。
  15. 如权利要求1-12任一项所述的天线组件，其特征在于，所述NFC馈电电路包括NFC芯片和巴伦，所述NFC馈电电路和所述第一辐射段之间设有NFC馈电点，所述巴伦电连接在所述NFC馈电点和所述NFC芯片之间，所述NFC芯片用于输出差分信号，所述巴伦用于将所述差分信号转换为单端信号。
  16. 如权利要求1-12任一项所述的天线组件，其特征在于，所述NFC馈电电路包括NFC芯片，所述NFC芯片用于输出差分信号，所述NFC芯片包括第一输出端和第二输出端，所述NFC馈电电路和所述第一辐射段之间设有NFC馈电点，所述第一输出端电连接至所述NFC馈电点，所述第二输出端电连接至所述第二辐射段。
  17. 如权利要求16所述的天线组件，其特征在于，所述第二输出端和所述第二辐射段之间串联第五电感，所述第五电感用于通过所述NFC天线的信号，且阻止非NFC天线信号。
  18. 如权利要求17所述的天线组件，其特征在于，所述第二辐射段和地之间串联第九电容，用于滤除低频的NFC信号，所述第九电容和所述第五电感依次串联在地和所述第二输出端之间。
  19. 一种移动终端，其特征在于，所述移动终端包括如权利要求1至权利要求18任一项所述的天线组件，所述天线组件设于所述移动终端的外壳内，所述第一辐射段和所述第二辐射段为所述移动终端的金属边框或者设于所述外壳内部的金属结构件。
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