WO2016015284A1 - 移动终端 - Google Patents

移动终端 Download PDF

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Publication number
WO2016015284A1
WO2016015284A1 PCT/CN2014/083425 CN2014083425W WO2016015284A1 WO 2016015284 A1 WO2016015284 A1 WO 2016015284A1 CN 2014083425 W CN2014083425 W CN 2014083425W WO 2016015284 A1 WO2016015284 A1 WO 2016015284A1
Authority
WO
WIPO (PCT)
Prior art keywords
radiator
mobile terminal
antenna
branch
grounding
Prior art date
Application number
PCT/CN2014/083425
Other languages
English (en)
French (fr)
Inventor
李元鹏
于亚芳
王汉阳
李建铭
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.)
Filing date
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 US15/326,678 priority Critical patent/US10347969B2/en
Priority to EP14898657.3A priority patent/EP3157098A4/en
Priority to CN201480060595.8A priority patent/CN105745785B/zh
Priority to PCT/CN2014/083425 priority patent/WO2016015284A1/zh
Publication of WO2016015284A1 publication Critical patent/WO2016015284A1/zh

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/12Supports; Mounting means
    • H01Q1/22Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242Supports; 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
    • H01Q1/243Supports; 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
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/36Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/44Details 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
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/48Earthing means; Earth screens; Counterpoises
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30Arrangements for providing operation on different wavebands
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30Arrangements for providing operation on different wavebands
    • H01Q5/307Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/357Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
    • H01Q5/364Creating multiple current paths
    • H01Q5/371Branching current paths
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30Arrangements for providing operation on different wavebands
    • H01Q5/378Combination of fed elements with parasitic elements
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04Resonant antennas
    • H01Q9/30Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/42Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/3827Portable transceivers

Definitions

  • the embodiments of the present invention relate to the field of communications technologies, and in particular, to a mobile terminal. Background technique
  • the design of the metal casing is generally adopted for the mobile terminal, and therefore, the antenna technology of the mobile terminal is put forward higher; specifically, the mobile terminal adopting the all-metal antenna scheme, the antenna is usually Exposed, however, when the user touches the metal casing, the antenna signal may deteriorate.
  • the mobile terminal in the prior art may, for example, design the antenna to the front of the mobile phone to be away from the user's contact; for example, a plastic sleeve or the like may be added outside the radiating portion of the metal antenna of the mobile phone to avoid Direct contact with the user. Summary of the invention
  • the embodiment of the invention provides a mobile terminal, which overcomes the problem that the antenna end of the metal casing of the prior art is deteriorated due to being touched by the user.
  • an embodiment of the present invention provides a mobile terminal, where the mobile terminal includes an antenna, and the antenna includes a first radiator and a second radiator electrically connected to the first radiator, and the Two ends of the first radiator respectively form a first ground branch and a second ground branch of the coupling portion, wherein the first radiator, the first ground branch and the second ground branch form a mobile terminal
  • An outer frame, the second radiator is disposed inside the outer frame formed by the first radiator, the first ground branch and the second ground branch, and the first radiator and the first The two radiators produce resonances in different frequency bands.
  • the first radiator works in a normal working frequency band when communicating, and the frequency band when the second radiator operates is higher than the normal working frequency band, where When the coupling portion formed between the first radiator and one of the grounding branches is touched by the user, the second radiator is frequency-shifted to the normal working frequency band to communicate with the first radiator.
  • the electrical connection regions of the first radiator and the second radiator form a feed of the antenna An electric portion; wherein the feeding portion is a coupling feed, a spacing between the first radiator and the second radiator is less than 1 mm, and a dielectric constant of the filling medium is between 2 and 6; Or the feeding portion is directly fed, the distance between the first radiator and the second radiator is less than 1 mm, the dielectric constant of the filling medium is between 2 and 6, and the A radiator and the second radiator are directly connected.
  • the antenna further includes: The matching circuit of the second radiator is connected, and the matching circuit includes a capacitor and an inductor for adjusting input impedances of the first radiator and the second radiator.
  • any one of the first to third possible implementations of the first aspect in a fourth possible implementation, are connected in parallel Radiation body.
  • the mobile terminal further includes: a metal back cover and a main board, wherein the main board is provided with a grounding surface;
  • the metal back cover is connected to the grounding surface of the main board, and the first radiator and the second radiator are directly connected to the main board through the matching circuit.
  • an end of the first grounding branch and an end of the second grounding branch are respectively connected to two of the metal back cover a first non-metallic material is filled between the first radiator and the first grounding branch and the second grounding branch, such that the metal back cover, the first grounding branch, and the second grounding branch are And the first radiator forms a metal casing of the integrated mobile terminal.
  • the first radiator, the first ground branch, and the second ground branch are disposed at At the top or bottom of the mobile terminal, one end of the second radiator is adjacent to the inner side of the metal back cover or the ground surface of the main board.
  • the mobile terminal provided by the embodiment of the present invention is configured to form a coupling structure with the first radiator at both ends of the first radiator by setting the radiation portion to the first radiator and the second radiator having different frequency bands.
  • Grounding branch wherein the first radiator and the grounding branches at both ends are formed.
  • FIG. 1 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of the mobile terminal provided by the embodiment shown in FIG. 1 being touched by a user;
  • FIG. 3 is a schematic diagram showing the relationship between the resonant frequency and the working efficiency of the antenna in the mobile terminal provided by the embodiment shown in FIG.
  • FIG. 5 is a schematic diagram of radiation of an antenna in a mobile terminal according to an embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of another mobile terminal according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of still another mobile terminal according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of still another mobile terminal according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of still another mobile terminal according to an embodiment of the present invention. detailed description
  • FIG. 1 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention.
  • the mobile terminal provided in this embodiment includes an antenna 100, and the antenna 100 includes a first radiator 110 and a second radiator 120 electrically connected to the first radiator 110, and two ends of the first radiator 110 Forming a first grounding branch 111 and a second grounding branch 112 of the coupling portion 110a; wherein the first radiator 110, the first grounding branch 111 and the second grounding branch 112 form an outer frame of the mobile terminal, the second radiator 120 is disposed inside the outer frame formed by the first radiator 110, the first grounding branch 111, and the second grounding branch 112, and the first radiator 110 and the second radiator 120 generate resonances of different frequency bands.
  • the electrical connection formed by the first radiator 110 and the second radiator 120 may be a direct connection or a coupling connection.
  • the embodiment does not limit the specifics of the first radiator 110 and the second radiator 120.
  • the second radiator 120 can be, for example, a “J” type, and the mobile terminal provided in this embodiment provided on the outer frame of the mobile terminal can be a mobile phone with an all-metal casing.
  • the antenna 100 having the first radiator 110 and the second radiator 120 can cover a wide range of LTE network bands, and the frequency band coverage can be between 791 MHz and 960 MHz, and 1710 MHz to 2690 MHz.
  • the frequency band 791 MHz to 960 MHz is specifically generated by the low frequency resonance of each of the first radiator 110 and the second radiator 120; the frequency band 1710 MHz to 2690 MHz is specifically generated by the first high frequency resonance and the second high frequency resonance,
  • the first high frequency resonance is generated by coupling between the second radiator 120 and the metal casing of the mobile phone, and the second high frequency resonance is generated by frequency doubling of the first radiator 110, and therefore, the two portions of the antenna 100 are radiated.
  • the body can cover the frequency band between 791MHz and 960MHz and between 1710MHz and 2690MHz; the coverage of the working frequency band is improved compared with the prior art mobile phone antenna.
  • the mobile terminal provided by the embodiment shown in FIG. 1 is touched by a user.
  • the mobile terminal provided in this embodiment forms a main radiator of the antenna 100, that is, the outer frame of the mobile terminal.
  • the first radiator 110 and the second radiator 120 can generate resonances of different frequency bands.
  • the radiator that is easy for the user to touch that is, the first radiator that constitutes the outer frame of the mobile terminal, can be used.
  • the working wavelengths of the two radiators can be controlled by adjusting the electrical lengths of the first radiator 110 and the second radiator 120.
  • the electrical length of the second radiator 120 can be, for example, greater than or equal to the first radiation.
  • One-eighth of the electrical length of the body 110 is achieved by controlling the electrical length of the two radiators to have different resonant frequencies.
  • the first radiator 110 when the user touches the gap between the first radiator 110 and one of the grounding branches, that is, the coupling portion 110a formed between the first radiator 110 and one of the grounding branches, the first radiator 110 is affected by The influence of the human body medium will shift to a lower frequency, and its performance will also drop significantly. Similarly, when the second radiator 120 is affected by the human body medium, the resonant frequency will also shift to a lower frequency.
  • the influence on the resonant frequency of the antenna is substantially the same. For example, when no one touches, the resonant frequency of the first radiator 110 is 810 MHz.
  • the resonance frequency of the first radiator 110 is shifted to 700 MHz, and after the touch of the coupling portion 110a, the resonance frequency of the first radiator 110 is shifted to 705 MHz.
  • the second radiator 120 by controlling the resonant frequency of the second radiator 120 during normal operation, when the user touches the gap between the first radiator 110 and one of the grounding branches, the second radiator 120 is The resonant frequency shifts to a low frequency to the normal operating frequency band of the first radiator 110 to replace the first radiator 110 for communication.
  • the normal operation referred to herein means that the mobile terminal has no user. The case when the coupling portion 110a is touched.
  • the antenna when the antenna is touched by the user, the antenna can still implement the radiation function as a whole; as shown in FIG. 3, in the mobile terminal provided in the embodiment shown in FIG.
  • a schematic diagram of the relationship between the resonant frequency of the antenna and the working efficiency, and the solid line portion is the relationship between the resonant frequency and the working efficiency of the antenna provided by the prior art after being affected by the human body medium, and the broken line portion is the first radiation provided by the embodiment of the present invention.
  • the antenna 100 of the mobile terminal provided by the embodiment increases the second radiator 120, the first radiation After the body 110 is affected by the human body medium, the added second radiator 120 still has a high working efficiency, and can meet the radiation requirement of the antenna 100. Therefore, when the body medium is affected, the antenna 100 of the mobile terminal provided in this embodiment may The working efficiency is ensured to meet the communication requirement; and the mobile terminal provided in this embodiment is When designing with an all-metal housing, there is no need to change the appearance of the metal housing.
  • the mobile terminal provided in this embodiment sets the radiating portion to have different frequency band resonances
  • the first radiator and the second radiator are respectively provided with grounding branches forming a coupling structure with the first radiator at both ends of the first radiator, wherein the first radiator and the grounding branches at both ends form the mobile terminal
  • the outer frame of the structure when the antenna of the structure is used for a mobile terminal having a metal casing, when the first radiator and the second radiator having different frequency bands are affected by the medium of the user, the second resonance frequency is higher
  • the radiation body is frequency-shifted to the resonant frequency range of the first radiator, and the first radiator is used for communication, thereby overcoming the problem that the antenna of the mobile terminal in the prior art is deteriorated due to being touched by the user, and correspondingly improved.
  • the performance of the antenna in the mobile terminal when the antenna of the structure is used for a mobile terminal having a metal casing, when the first radiator and the second radiator having different frequency bands are affected by the medium of the user, the second resonance frequency is higher
  • the first radiating body 110 and the first grounding branch 111 and the second grounding branch 112 disposed at both ends thereof are not directly connected, but are respectively connected to the first grounding branch 111 and
  • the second grounding branch 112 forms a coupling portion, that is, the first radiator 110 in FIG. 1 has a gap between the first grounding branch 111 and the second grounding branch 112, respectively; and the first radiator 110 and the second radiator 120
  • the electrical connection region forms the feed portion 130 of the antenna.
  • the mobile terminal provided in this embodiment is applied to high-frequency communication, and the antenna 100 of the mobile terminal needs to perform high-frequency signal radiation, and the foregoing embodiment can also be achieved.
  • the first radiator 110 can operate in a high frequency band, such as a Wireless-Fidelity (Wi-Fi) network or a Global Positioning System (GPS).
  • the frequency band correspondingly, the operating frequency band of the second radiator 120 is higher than the operating frequency band of the first radiator 110, when the user touches the coupling portion 110a of the outer frame formed by the first radiator 110 of the antenna 100,
  • the second radiator 120 can also be biased to the frequency band of Wi-Fi or GPS.
  • the design of the antenna in the mobile terminal provided by this embodiment has universal applicability as long as the operating frequency band of the second radiator 120 is controlled to be higher than the working frequency band of the first radiator 110, and when the user touches, It is ensured that the operating frequency band of the second radiator 120 can be reduced to the frequency band when the first radiator 110 is working normally.
  • FIG. 4 is a schematic diagram of radiation of an antenna in the prior art
  • FIG. 5 is a schematic diagram of radiation of an antenna in a mobile terminal according to an embodiment of the present invention.
  • the solid line part is the return loss of the antenna in the prior art
  • the broken line part is the return loss when the antenna in the prior art is touched by the user.
  • the antenna is normal.
  • the return loss during operation has standing waves in the low frequency band and the high frequency band.
  • the return loss has no standing wave in the high frequency band, that is, the frequency is completely shifted off;
  • FIG. 4 is a schematic diagram of radiation of an antenna in the prior art
  • FIG. 5 is a schematic diagram of radiation of an antenna in a mobile terminal according to an embodiment of the present invention.
  • the broken line portion is the return loss when the antenna in the prior art is touched by the user, and the solid line portion is the antenna in the embodiment.
  • the frequency offset effect of the two radiators 120, in the high frequency band, for example, the GPS band still has standing waves.
  • the first radiator 110 and the second radiator 120 of the antenna 100 are electrically connected radiators; optionally, the first radiator 110 and the second radiator 120 in this embodiment
  • the formed feeding portion 130 can be a coupling feed or a direct feed.
  • FIG. 2 provides a feed portion 130 of the antenna, which is specifically a coupling feed.
  • FIG. 6 is a schematic embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of another mobile terminal according to an embodiment of the present invention.
  • the feeding portion 130 of the antenna provided in the embodiment shown in FIG. 6 and FIG. 7 is specifically a direct feeding. . Specifically, if the coupling feed shown in FIG.
  • the coupling area can be increased as much as possible within the design range, thereby ensuring the coupling effect of the first radiator 110 and the second radiator 120; if the direct feeding shown in FIG. 6 or FIG. 7 is formed, the coupling feeding is performed On the basis of the design requirements of the first radiator 110 and the second radiator 120, the first radiator 110 and the second radiator 120 can also be directly connected by a metal connection to enhance the electrical connection effect of the radiator; It should be noted that, as shown in FIG. 6 and FIG. 7, the embodiment is not limited to the direction of the second radiator 120 in the outer frame formed by the first radiator 110 and the ground branch.
  • FIG. 8 a schematic structural diagram of a mobile terminal according to an embodiment of the present invention is provided, and a feeding of the antenna 100 in the mobile terminal provided by this embodiment is provided.
  • the portion 130 is also a direct feed, which is different from the two-part radiator connected by the metal wire in the embodiment shown in FIG. 6 and FIG. 7.
  • a part of the first radiator 110 and the second A part of the radiator 120 is directly connected to achieve the same feeding effect.
  • the feed power of the antenna 100 can supply power to the first radiator 110 and the second radiator 120 at the same time, that is, the first radiator 110 and the second radiator 120 are parallel radiators.
  • the antenna 100 further includes: a matching circuit 140 respectively connected to the first radiator 110 and the second radiator 120, the matching circuit 140 generally includes a capacitor and an inductor for adjusting An input impedance of the first radiator 110 and the second radiator 120; specifically, one end of the matching circuit 140 is connected to the first radiator 110 and the second radiator 120, and the other end of the matching circuit 140 is connected to the movement The RF end of the terminal, such that the radiator of the antenna 100 The impedance is conjugated to the impedance of the RF terminal.
  • FIG. 9 is a schematic structural diagram of still another mobile terminal according to an embodiment of the present invention.
  • the mobile terminal 10 provided in this embodiment further includes a metal back cover 20 and a main board (not shown in the figure).
  • the motherboard is provided with a grounding surface; wherein the metal back cover 20 is connected to the grounding surface of the main board, and the first radiator 110 and the second radiator 120 are directly connected to the main board through the matching circuit 140, FIG.
  • the illustrated embodiment is illustrated by taking the feed portion 130 formed by the first radiator 110 and the second radiator 120 as a direct feed.
  • first grounding branch 111 and one end of the second grounding branch 112 are respectively connected to two sides of the metal back cover 20, the first radiator 110 and the first grounding branch 111, the second The grounding branches 112 are respectively filled with a non-metal material, so that the metal back cover 20, the first grounding branch 111, the second grounding branch 112, and the first radiator 110 form a metal casing of the integrated mobile terminal 10, this embodiment
  • the metal casing with the overall effect meets the user's requirements for the appearance of the mobile terminal and has a good market prospect.
  • the specific process of the antenna 100 is that the signal is transmitted from the main board, and after passing through the matching circuit 140, the radiator of the antenna 100, that is, the first radiator 110 and the second radiator 120, and then the signal
  • the first grounding branch 111 and the second grounding branch 112 are coupled to both ends of the first radiator 110. Since the two grounding branches are connected to the metal casing 20, the metal casing 20 is connected to the grounding surface of the main board, so that the signal is returned to the main board.
  • the passage of the power line is formed, and the space forms an unclosed magnetic line of force, and the electric field and the magnetic field are converted into each other to form radiation for communication purposes.
  • the first radiator 110, the first grounding branch 112, and the second grounding branch 112 may be disposed at the top or the bottom of the mobile terminal 10, and one end of the second radiator 120 is close to the metal.
  • the mobile terminal provided by the embodiment has a design structure not only having an integrated metal casing, but also having a good radiation effect, and the second radiator having a higher resonance frequency band disposed inside the metal outer frame advantageously avoids the user. After touching the first radiator of the metal outer frame, causing the letter The problem of the number is worse.

Abstract

本发明实施例提供一种移动终端,该移动终端包括天线,该天线包括第一辐射体和与第一辐射体形成电连接的第二辐射体,以及与该第一辐射体的两端分别形成耦合部分的第一接地分支和第二接地分支;其中,第一辐射体、第一接地分支和第二接地分支形成该移动终端的外边框,该第二辐射体围设在第一辐射体、第一接地分支和第二接地分支形成的外边框的内侧,并且该第一辐射体和该第二辐射体产生不同频段的谐振。本发明实施例提供的移动终端克服了现有技术中的天线因被使用者触碰而导致信号变差的问题。

Description

移动终端
技术领域
本发明实施例涉及通信技术领域, 尤其涉及一种移动终端。 背景技术
为了满足用户对移动终端外观的需求, 通常对移动终端采用金属外壳 的设计方案, 因此, 对移动终端的天线技术提出了更高的要求; 具体地, 采用全金属天线方案的移动终端, 天线通常外露, 然而, 使用者接触金属 外壳时, 会导致天线信号变差。 为了避免上述问题, 现有技术中的移动终 端例如可以将天线设计到手机的正面, 以远离使用者的接触; 又例如可以 在手机的金属天线的辐射部分外面增加塑胶套等介质, 以避开使用者的直 接接触。 发明内容
本发明实施例提供一种移动终端, 克服了现有技术中金属外壳的移动终 端因被使用者触碰而导致天线信号变差的问题。
第一方面, 本发明实施例提供一种移动终端, 所述移动终端包括天线, 所述天线包括第一辐射体和与所述第一辐射体形成电连接的第二辐射体, 以 及与所述第一辐射体的两端分别形成耦合部分的第一接地分支和第二接地分 支, 其中, 所述第一辐射体、 所述第一接地分支和所述第二接地分支形成所 述移动终端的外边框, 所述第二辐射体围设在所述第一辐射体、 所述第一接 地分支和所述第二接地分支形成的外边框的内侧, 并且所述第一辐射体和所 述第二辐射体产生不同频段的谐振。
在第一方面的第一种可能的实现方式中, 所述第一辐射体进行通信时工 作在正常工作频段, 所述第二辐射体工作时的频段高于所述正常工作频段, 其中, 在所述第一辐射体与其中一个接地分支间形成的耦合部分被用户触碰 到时, 所述第二辐射体频偏到所述正常工作频段, 以替代所述第一辐射体进 行通信。 根据第一方面或第一方面的第一种可能的实现方式, 在第二种可能的实 现方式中, 所述第一辐射体和所述第二辐射体的电连接区域形成所述天线的 馈电部分; 其中, 所述馈电部分为耦合馈电, 所述第一辐射体与所述第二辐 射体之间的间距小于 1毫米, 并且填充介质的介电常数在 2到 6之间; 或者, 所述馈电部分为直接馈电, 所述第一辐射体与所述第二辐射体之间的间 距小于 1毫米, 填充介质的介电常数在 2到 6之间, 并且所述第一辐射体和 所述第二辐射体直接连接。
根据第一方面、第一方面的第一种和第二种可能的实现方式中任意一种, 在第三种可能的实现方式中, 所述天线还包括: 分别与所述第一辐射体和所 述第二辐射体连接的匹配电路, 所述匹配电路包括电容和电感, 用于调整所 述第一辐射体和所述第二辐射体的输入阻抗。
根据第一方面、第一方面的第一种到第三种可能的实现方式中任意一种, 在第四种可能的实现方式中, 所述第一辐射体和所述第二辐射体为并联的辐 射体。
根据第一方面的第四种可能的实现方式, 在第五种可能的实现方式中, 所述移动终端还包括: 金属后盖和主板, 所述主板上设置有接地表面;
其中, 所述金属后盖与所述主板的接地表面相连, 所述第一辐射体和所 述第二辐射体通过所述匹配电路直接连接到所述主板上。
根据第一方面的第五种可能的实现方式, 在第六种可能的实现方式中, 所述第一接地分支的一端和所述第二接地分支的一端分别连接在所述金属后 盖的两侧, 所述第一辐射体和所述第一接地分支、 所述第二接地分支间分别 填充非金属材料, 使得所述金属后盖、 所述第一接地分支、 所述第二接地分 支, 以及所述第一辐射体形成一体化的移动终端的金属外壳。
根据第一方面的第五种或第六种可能的实现方式, 在第七种可能的实现 方式中, 所述第一辐射体、 所述第一接地分支和所述第二接地分支设置在所 述移动终端的顶部或底部, 所述第二辐射体的一端靠近所述金属后盖的内侧 或者所述主板的接地表面。
本发明实施例所提供的移动终端, 通过将辐射部分设置为具有不同频段 谐振的第一辐射体和第二辐射体, 在第一辐射体的两端分别设置与该第一辐 射体形成耦合结构的接地分支, 其中, 该第一辐射体和两端的接地分支形成 该移动终端的外边框, 将该结构的天线用于具有金属外壳的移动终端时, 当 具有不同频段谐振的第一辐射体和第二辐射体在受到使用者的介质影响时, 谐振频段较高的第二辐射体可以主动频偏到第一辐射体的谐振频率范围内, 替代第一辐射体进行通信, 因此克服了现有技术中移动终端的天线因被使用 者触碰而导致信号变差的问题, 相应地提高了移动终端中天线的使用性能。 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案, 下面将对 实施例或现有技术描述中所需要使用的附图作一简单地介绍, 显而易见 地, 下面描述中的附图是本发明的一些实施例, 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为本发明实施例所提供的一种移动终端的结构示意图;
图 2为图 1所示实施例提供的移动终端被使用者触碰的示意图; 图 3为图 1所示实施例提供的移动终端中天线的谐振频率和工作效率关 系的示意图;
图 4为现有技术中的天线的辐射示意图;
图 5为本发明实施例所提供的一种移动终端中天线的辐射示意图; 图 6为本发明实施例所提供的另一种移动终端的结构示意图;
图 7为本发明实施例所提供的又一种移动终端的结构示意图;
图 8为本发明实施例所提供的还一种移动终端的结构示意图;
图 9为本发明实施例所提供的再一种移动终端的结构示意图。 具体实施方式
为使本发明实施例的目的、 技术方案和优点更加清楚, 下面将结合本 发明实施例中的附图, 对本发明实施例中的技术方案进行清楚、 完整地描 述, 显然,所描述的实施例是本发明一部分实施例, 而不是全部的实施例。 基于本发明中的实施例, 本领域普通技术人员在没有作出创造性劳动前提 下所获得的所有其他实施例, 都属于本发明保护的范围。
图 1为本发明实施例所提供的一种移动终端的结构示意图。如图 1所示, 本实施例提供的移动终端包括天线 100, 该天线 100包括第一辐射体 110和 与该第一辐射体 110形成电连接的第二辐射体 120, 以及与该第一辐射体 110 的两端分别形成耦合部分 110a的第一接地分支 111和第二接地分支 112; 其 中, 该第一辐射体 110、 第一接地分支 111和第二接地分支 112形成该移动 终端的外边框, 该第二辐射体 120围设在该第一辐射体 110、 第一接地分支 111和第二接地分支 112形成的外边框的内侧, 并且该第一辐射体 110和该 第二辐射体 120产生不同频段的谐振。 在本实施例中, 第一辐射体 110与第 二辐射体 120形成的电连接可以是直接连接, 也可以是耦合连接, 本实施例 不限制第一辐射体 110与第二辐射体 120的具体连接方式; 另外, 如图 1所 示, 第二辐射体 120例如可以为 "J"型, 环绕的设置在移动终端的外边框的 本实施例提供的移动终端, 可以为具有全金属外壳的手机。 本实施例提 供的移动终端中, 具有第一辐射体 110和第二辐射体 120的天线 100可以覆 盖较宽范围的 LTE网络频段,其频段覆盖范围可以在 791MHz到 960MHz之 间, 以及 1710MHz到 2690MHz之间, 举例来说, 频段 791MHz到 960MHz 具体由第一辐射体 110和第二辐射体 120各自的低频谐振产生;频段 1710MHz 到 2690MHz具体由该第一高频谐振和第二高频谐振产生,所述第一高频谐振 通过第二辐射体 120与手机金属外壳之间的耦合产生, 所述第二高频谐振通 过第一辐射体 110的倍频产生, 因此, 该天线 100的两部分辐射体可以覆盖 791MHz到 960MHz之间, 以及 1710MHz到 2690MHz之间的频段; 较现有 技术中的手机天线提高了工作频段的覆盖范围。
目前通常使用的手机, 在使用者触碰到天线的辐射体与接地分支间的缝 隙时, 天线性能会明显下降, 并影响手机的使用。 如图 2所示, 为图 1所示 实施例提供的移动终端被使用者触碰的示意图,本实施例所提供的移动终端, 由于该移动终端的外边框构成天线 100的主要辐射体, 即第一辐射体 110和 第二辐射体 120可以产生不同频段的谐振, 在具体实现中, 可以将使用者容 易触碰到的辐射体, 也就是用来构成移动终端的外边框的第一辐射体 110作 为通信时的主要辐射体,将其产生谐振的频率控制在正常工作的低频频段内, 而使第二辐射体 120产生谐振的频率高于第一辐射体 110产生谐振的频率, 例如可以是参与通信工作的较高工作频段, 也可以是不参与通信工作的高频 频段。 在具体实现中, 可以通过调整第一辐射体 110和第二辐射体 120的电 长度来控制该两个辐射体对应的工作波长, 第二辐射体 120的电长度例如可 以为大于等于第一辐射体 110电长度的 1/8,通过控制两个辐射体的电长度实 现其具有不同的谐振频率。
可以理解的, 在使用者触碰到第一辐射体 110与其中一个接地分支间的 缝隙时, 即第一辐射体 110与其中一个接地分支间形成的耦合部分 110a, 第 一辐射体 110因受人体介质的影响谐振频率会向更低频率偏移, 其性能也会 明显下降, 类似地, 第二辐射体 120受到人体介质的影响时, 谐振频率也会 相应的向更低频率偏移。 另外, 根据理论和实验的经验, 不同使用者在触碰 到上述耦合部分 110a时, 对天线谐振频率的影响大致相同, 例如, 在无人触 碰时, 第一辐射体 110的谐振频率是 810MHz, 杰克触碰耦合部分 110a后, 第一辐射体 110的谐振频率偏移到 700MHz, 汤姆触碰到耦合部分 110a后, 第一辐射体 110的谐振频率偏移到 705MHz。 在本发明实施例中, 通过对第 二辐射体 120正常工作时谐振频率的控制, 当使用者触碰到第一辐射体 110 与其中一个接地分支间的缝隙时, 使第二辐射体 120的谐振频率向低偏移到 第一辐射体 110的正常工作频段内, 以代替第一辐射体 110进行通信, 需要 说明的是, 这里所说的正常工作都是指所述移动终端在没有使用者触碰耦合 部分 110a时的情况。 因此, 本实施例提供的移动终端, 在其天线受到使用者 的触碰时, 天线在整体上还是可以实现辐射功能的; 如图 3所示, 为图 1所 示实施例提供的移动终端中天线的谐振频率和工作效率关系的示意图, 实线 部分为现有技术中提供的天线在受到人体介质影响后的谐振频率和工作效率 的关系, 虚线部分为本发明实施例提供的包括第一辐射体 110和第二辐射体 120的天线 100在受到人体介质影响后的谐振频率和工作效率的关系, 由于 本实施例提供的移动终端的天线 100增加了第二辐射体 120, 因而在第一辐 射体 110受到人体介质影响后, 增加的第二辐射体 120仍然具有较高的工作 效率, 可以满足天线 100的辐射要求, 因此在受到人体介质影响时, 本实施 例提供的移动终端的天线 100可以保证工作效率满足通信需求; 并且本实施 例提供的移动终端, 在使用全金属外壳的外观设计时, 不需要改变金属外壳 的形貌。
本实施例所提供的移动终端, 通过将辐射部分设置为具有不同频段谐振 的第一辐射体和第二辐射体, 在第一辐射体的两端分别设置与该第一辐射体 形成耦合结构的接地分支, 其中, 该第一辐射体和两端的接地分支形成该移 动终端的外边框, 将该结构的天线用于具有金属外壳的移动终端时, 当具有 不同频段谐振的第一辐射体和第二辐射体在受到使用者的介质影响时, 谐振 频率较高的第二辐射体频偏到第一辐射体的谐振频率范围内, 替代第一辐射 体进行通信, 因此克服了现有技术中移动终端的天线因被使用者触碰而导致 信号变差的问题, 相应地提高了移动终端中天线的使用性能。
需要说明的是, 本实施例在具体实现时, 第一辐射体 110与其两端设置 的第一接地分支 111和第二接地分支 112并不是直接连接, 而是分别与该第 一接地分支 111和该第二接地分支 112形成耦合部分, 即图 1中第一辐射体 110分别与第一接地分支 111和第二接地分支 112之间具有缝隙; 并且第一 辐射体 110和第二辐射体 120的电连接区域形成该天线的馈电部分 130。
在本实施例的另一种可能的实现方式中, 将本实施例提供的移动终端应 用在高频通信中, 该移动终端的天线 100则需要进行高频信号的辐射, 同样 可以达到上述实施例的使用效果, 具体地, 第一辐射体 110可以工作在高频 频段, 例如为无线保真 (Wireless-Fidelity, 简称为: Wi-Fi) 网络或者全球定 位系统(Global Positioning System, 简称为: GPS )频段, 相应地, 第二辐射 体 120的工作频段高于该第一辐射体 110的工作频段, 在使用者触碰到天线 100的第一辐射体 110形成的外边框的耦合部分 110a时, 第二辐射体 120同 样可以频偏到 Wi-Fi或者 GPS的使用频段。 本实施例提供的移动终端中天线 的设计方案具有普遍的适用性, 只要控制第二辐射体 120的工作频段高于第 一辐射体 110的工作频段,并且在收到使用者的触碰时,保证第二辐射体 120 的工作频段可以降低到第一辐射体 110正常工作时的频段即可。
举例来说明, 图 4为现有技术中的天线的辐射示意图, 图 5为本发明实 施例所提供的一种移动终端中天线的辐射示意图。 如图 4所示, 实线部分为 现有技术中天线正常工作时的回波损耗, 虚线部分为现有技术中的天线被使 用者触碰时的回波损耗, 由图 4可见, 天线正常工作时的回波损耗在低频频 段和高频频段均有驻波, 在使用者触碰到天线辐射体形成的边框时, 回波损 耗在高频频段已经没有驻波, 即完全频偏掉; 再如图 5所示, 虚线部分为现 有技术中的天线被使用者触碰时的回波损耗, 实线部分为本实施例中的天线 100被使用者触碰时的回波损耗, 由图 5可见, 本实施例提供的移动终端, 当人体触碰到天线 100的第一辐射体 110形成的外边框的耦合部分 110a时, 由于第二辐射体 120的频偏效果, 在高频频段, 例如是 GPS频段仍然有驻波 存在。
本发明实施例提供的移动终端中, 天线 100的第一辐射体 110和第二辐 射体 120为电连接的辐射体; 可选地, 本实施例中第一辐射体 110和第二辐 射体 120形成的馈电部分 130可以为耦合馈电或者直接馈电, 请参考图 2, 图 2所示实施例提供天线的馈电部分 130具体为耦合馈电, 图 6为本发明实 施例所提供的另一种移动终端的结构示意图, 图 7为本发明实施例所提供的 又一种移动终端的结构示意图, 图 6和图 7所示实施例提供的天线的馈电部 分 130具体为直接馈电。 具体地, 若是形成图 2所示的耦合馈电, 第一辐射 体 110与第二辐射体 120之间的间距要小于 1毫米, 并且填充介质的介电常 数在 2到 6之间, 进一歩地, 可以在设计范围内尽可能的提高耦合面积, 从 而保证第一辐射体 110与第二辐射体 120的耦合效果; 若是形成图 6或图 7 所示的直接馈电, 在上述耦合馈电对第一辐射体 110与第二辐射体 120的设 计要求的基础上, 该第一辐射体 110与该第二辐射体 120还可以通过金属连 线直接连接, 增强辐射体的电连接效果; 需要说明的是, 如图 6和图 7所示, 本实施例不限于第二辐射体 120在第一辐射体 110和接地分支构成的外边框 内的方向。 在本实施例的另一种可能的实现方式中, 如图 8所示, 为本发明 实施例所提供的还一种移动终端的结构示意图, 本实施例提供的移动终端中 天线 100的馈电部分 130也为直接馈电, 不同于图 6和图 7所示实施例通过 金属连线连接的两部分辐射体,本实施例形成的馈电结构中,第一辐射体 110 的一部分与第二辐射体 120的一部分直接相连, 可以达到同样的馈电效果。
需要说明的是, 天线 100的馈电源可以同时对第一辐射体 110和第二辐 射体 120供电, 即该第一辐射体 110和该第二辐射体 120为并联的辐射体。
进一歩地, 本实施例提供的移动终端中, 天线 100还包括: 分别与第一 辐射体 110和第二辐射体 120连接的匹配电路 140, 该匹配电路 140通常包 括电容和电感, 用于调整第一辐射体 110和第二辐射体 120的输入阻抗; 具 体地,该匹配电路 140的一端与该第一辐射体 110和该第二辐射体 120连接, 该匹配电路 140的另一端连接到移动终端的射频端, 使得天线 100的辐射体 的阻抗与射频端的阻抗实现共轭匹配。
图 9为本发明实施例所提供的再一种移动终端的结构示意图。如图所示, 在上述图 1、 图 2、 图 6〜图 8所示实施例提供的移动终端的基础上, 本实施 例提供的移动终端 10还包括金属后盖 20和主板 (图中未示出) , 该主板上 设置有接地表面; 其中, 该金属后盖 20与主板的接地表面相连, 第一辐射体 110和第二辐射体 120通过匹配电路 140直接连接到主板上, 图 9所示实施 例以第一辐射体 110和第二辐射体 120形成的馈电部分 130为直接馈电为例 予以示出。 进一歩地, 第一接地分支 111的一端和第二接地分支 112的一端 分别连接在金属后盖 20的两侧, 所述第一辐射体 110和所述第一接地分支 111、 所述第二接地分支 112间分别填充非金属材料, 使得金属后盖 20、 该 第一接地分支 111、该第二接地分支 112, 以及第一辐射体 110形成一体化的 移动终端 10的金属外壳, 本实施例中具有整体效果的金属外壳, 符合使用者 对移动终端外观的要求, 具有较好的市场前景。
本实施例提供的移动终端, 天线 100工作的具体过程为, 信号从主板发 射过来, 经过匹配电路 140后, 进入天线 100的辐射体, 即第一辐射体 110 和第二辐射体 120,然后信号耦合到第一辐射体 110两端的第一接地分支 111 和第二接地分支 112, 由于该两个接地分支和金属外壳 20相连, 金属外壳 20 又和主板的接地表面相连, 从而信号返回到主板, 形成电力线闭合的通路, 并且空间会形成不闭合的磁力线, 电场, 磁场相互转换就形成辐射, 以达到 通信的目的。
需要说明的是, 图 1、 图 2、 图 6〜图 8所示实施例提供的移动终端中仅 示出移动终端的天线部分, 图 9所示实施例提供的移动终端中天线的设计方 案与上述实施例中的天线相同, 因此, 在本实施例提供的移动终端中, 天线 的使用性能和有益效果与上述实施例相同, 故在此不再赘述。
可选地, 本实施例提供的移动终端, 第一辐射体 110、 第一接地分支 112 和第二接地分支 112可以设置在移动终端 10的顶部或底部, 第二辐射体 120 的一端靠近金属后盖 20的内侧或者主板的接地表面。
本实施例提供的移动终端, 其设计结构不仅具有整体化的金属外壳, 并 且具有良好的辐射效果, 由于在金属外边框内部设置的谐振频段较高的第二 辐射体, 有利的避免了使用者在触碰到金属外边框的第一辐射体后, 导致信 号变差的问题。
最后应说明的是: 以上各实施例仅用以说明本发明的技术方案, 而非对 其限制; 尽管参照前述各实施例对本发明进行了详细的说明, 本领域的普通 技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改, 或者对其中部分或者全部技术特征进行等同替换; 而这些修改或者替换, 并 不使相应技术方案的本质脱离本发明各实施例技术方案的范围。

Claims

权 利 要 求 书
1、 一种移动终端, 其特征在于, 所述移动终端包括天线, 所述天线包括 第一辐射体和与所述第一辐射体形成电连接的第二辐射体, 以及与所述第一 辐射体的两端分别形成耦合部分的第一接地分支和第二接地分支; 其中, 所 述第一辐射体、 所述第一接地分支和所述第二接地分支形成所述移动终端的 外边框, 所述第二辐射体围设在所述第一辐射体、 所述第一接地分支和所述 第二接地分支形成的外边框的内侧, 并且所述第一辐射体和所述第二辐射体 产生不同频段的谐振。
2、 根据权利要求 1所述的移动终端, 其特征在于, 所述第一辐射体进行 通信时工作在正常工作频段, 所述第二辐射体工作时的频段高于所述正常工 作频段, 其中, 在所述第一辐射体与其中一个接地分支间形成的耦合部分被 用户触碰到时, 所述第二辐射体频偏到所述正常工作频段, 以替代所述第一 辐射体进行通信。
3、 根据权利要求 1或 2所述的移动终端, 其特征在于, 所述第一辐射体 和所述第二辐射体的电连接区域形成所述天线的馈电部分; 其中, 所述馈电 部分为耦合馈电,所述第一辐射体与所述第二辐射体之间的间距小于 1毫米, 并且填充介质的介电常数在 2到 6之间; 或者,
所述馈电部分为直接馈电, 所述第一辐射体与所述第二辐射体之间的间 距小于 1毫米, 填充介质的介电常数在 2到 6之间, 并且所述第一辐射体和 所述第二辐射体直接连接。
4、 根据权利要求 1~3中任一项所述的移动终端, 其特征在于, 所述天线 还包括: 分别与所述第一辐射体和所述第二辐射体连接的匹配电路, 所述匹 配电路包括电容和电感, 用于调整所述第一辐射体和所述第二辐射体的输入 阻抗。
5、 根据权利要求 1~4中任一项所述的移动终端, 其特征在于, 所述第一 辐射体和所述第二辐射体为并联的辐射体。
6、根据权利要求 4所述的移动终端,其特征在于,所述移动终端还包括: 金属后盖和主板, 所述主板上设置有接地表面;
其中, 所述金属后盖与所述主板的接地表面相连, 所述第一辐射体和所 述第二辐射体通过所述匹配电路直接连接到所述主板上。
7、 根据权利要求 6所述的移动终端, 其特征在于, 所述第一接地分支的 一端和所述第二接地分支的一端分别连接在所述金属后盖的两侧, 所述第一 辐射体和所述第一接地分支、 所述第二接地分支间分别填充非金属材料, 使 得所述金属后盖、 所述第一接地分支、 所述第二接地分支, 以及所述第一辐 射体形成一体化的移动终端的金属外壳。
8、根据权利要求 6或 7所述的移动终端,其特征在于,所述第一辐射体、 所述第一接地分支和所述第二接地分支设置在所述移动终端的顶部或底部, 所述第二辐射体的一端靠近所述金属后盖的内侧或者所述主板的接地表面。
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