WO2016065630A1 - 一种无线移动设备 - Google Patents

一种无线移动设备 Download PDF

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Publication number
WO2016065630A1
WO2016065630A1 PCT/CN2014/090091 CN2014090091W WO2016065630A1 WO 2016065630 A1 WO2016065630 A1 WO 2016065630A1 CN 2014090091 W CN2014090091 W CN 2014090091W WO 2016065630 A1 WO2016065630 A1 WO 2016065630A1
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WIPO (PCT)
Prior art keywords
metal frame
point
circuit board
mobile device
antenna
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PCT/CN2014/090091
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English (en)
French (fr)
Inventor
王汉阳
王洪裕
徐慧梁
吕书文
李建铭
王磊
陈丽娜
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华为技术有限公司
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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 BR112017008681-6A priority Critical patent/BR112017008681B1/pt
Priority to CN201480047676.4A priority patent/CN105745787B/zh
Priority to PCT/CN2014/090091 priority patent/WO2016065630A1/zh
Priority to EP14904882.9A priority patent/EP3200280B1/en
Priority to US15/523,227 priority patent/US10347988B2/en
Publication of WO2016065630A1 publication Critical patent/WO2016065630A1/zh

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Classifications

    • 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
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
    • H01Q5/364—Creating multiple current paths
    • H01Q5/371—Branching current paths
    • 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
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/10—Resonant slot antennas
    • 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
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
    • H01Q5/364—Creating multiple current paths
    • 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
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/378—Combination of fed elements with parasitic elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/13—Receivers

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a wireless mobile device.
  • wireless mobile devices have the advantages of portability and the like. Especially for mobile devices such as mobile phones, in order to pursue a more beautiful appearance, in addition to the compact size of the whole machine, more and more metal parts are applied to the design of wireless mobile devices.
  • FIG. 1 is a schematic structural diagram of a mobile phone setting antenna in the prior art.
  • the mobile phone shown in FIG. 1 includes a metal frame 01, a circuit board 02 located in the metal frame 01, a gap 012 formed between the metal frame 01 and the circuit board 012, and the design of the main antenna, the diversity antenna, and the GPS antenna in the mobile phone.
  • the resonance is generated by the gap 012 between the metal frame 01 and the circuit board 02, and then the resonance frequency of the slot antenna is controlled by setting the grounding point 03 and the feeding point 04 at different positions in the gap 012.
  • the gap 12 controls the resonant frequency by controlling the position of the grounding point and the feeding point
  • the generated resonant frequency is its dominant frequency and its harmonics, and can usually only be used for the design of a single-band antenna.
  • the present invention provides a wireless mobile device having at least one slot antenna that can meet the operational requirements of multiple operating frequency bands, improving the compactness of the structure in the wireless mobile device.
  • a wireless mobile device in a first aspect, includes a metal frame, a circuit board disposed in the metal frame, and a gap between at least one side of the circuit board and the metal frame, wherein The method includes: a first grounding point, a second grounding point, a feeding point, and at least one antenna open branch, wherein:
  • the first grounding point is connected to the circuit board and the metal frame
  • the second grounding point is connected to the circuit board and the metal frame
  • the feeding point is located at the first grounding point and the second grounding Connected between the locations and to the circuit board and the metal frame;
  • Each of the antenna open branches is suspended in the outer space of the circuit board, and one end is connected to the metal frame across the gap, and a connection point of the antenna open branch and the metal frame is located at the feeding point and the Second grounding point between.
  • the at least one antenna open stub includes a first antenna open stub and a second antenna open stub, and the first antenna open stub is connected to the metal frame a point is located between the feed point and the second ground point, and a connection point of the second antenna open branch and the metal frame is located at a connection point of the first antenna open branch and the metal frame Between the second grounding points.
  • the electrical length of the first antenna open stub is the first ground point and the first antenna open branch One-half the electrical length between the connection points of the metal frame.
  • the electrical length of the second antenna open stub is the first ground point and the second antenna open node One-half the electrical length between the connection points of the metal frame.
  • the width of the slit is greater than or equal to 0.5 mm.
  • the feeding point is located between the first grounding point and the second grounding point, and is connected to the circuit board and the metal frame, including :
  • the feed point has a strip structure, and one end of the feed point is connected to the circuit board, and the other end is connected to the metal frame.
  • the feeding point is located between the first ground point and the second ground point, and the circuit board and the metal Frame connection, including:
  • the feed point has a ring structure, and the feed point is disposed on the circuit board and coupled to the metal frame.
  • the first grounding point and the second grounding point, the feeding point, the portion between the first grounding point and the second grounding point, the metal frame and the circuit board cooperate to form the first a slot antenna of a working frequency band; and, each antenna open branch and a first ground point, a feed point, a portion of the gap between the first ground point and the antenna open branch and the metal frame connection point, the metal frame, and the circuit board Cooperate with antennas that form other resonant frequencies. Therefore, the first working frequency band and the other working frequency bands in the wireless mobile device form an effective resonance through a gap between the circuit board and the metal frame, and the radiation efficiency of the antenna is not affected by the metal frame, and therefore, in the wireless mobile device.
  • the slot antenna has a relatively high radiant power in the required operating frequency band.
  • the slot antenna in the above wireless mobile device simultaneously satisfies the working requirements of the first working frequency band and each working frequency band corresponding to each antenna open branch, thereby improving the compactness of the wireless mobile device structure.
  • FIG. 1 is a schematic structural diagram of a wireless mobile device setting antenna in the prior art
  • FIG. 2 is a schematic structural diagram of setting an antenna in a wireless mobile device according to the present invention.
  • 3 is a schematic diagram of return loss when the working frequency band of the slot antenna is 1.5 GHz;
  • FIG. 4 is a schematic diagram of return loss of an antenna in a wireless mobile device according to the present invention.
  • FIG. 2 is a schematic structural diagram of setting an antenna in a wireless mobile device according to an embodiment of the present invention.
  • the wireless mobile device includes a metal frame 1, a circuit board 2 disposed in the metal frame 1, and a gap 3 between at least one side of the circuit board 2 and the metal frame 1, the wireless The mobile device further includes: a first grounding point 8, a second grounding point 4, a feeding point 7, and at least one antenna open branch, such as the first antenna open branch 6 and the second antenna open branch 5 as shown in FIG. 2; :
  • the first grounding point 8 is connected to the circuit board 2 and the metal frame 1
  • the second grounding point 4 is connected to the circuit board 2 and the metal frame 1
  • the feeding point 7 is located between the first grounding point 8 and the second grounding point 4, and Connected to the circuit board 2 and the metal frame 1;
  • each antenna open branch is suspended in the outer space of the circuit board 2, and one end is connected to the metal frame 1 across the slot 3.
  • the connection point between the antenna open branch and the metal frame 1 is located at the feed point 7 and the second ground point 4. between.
  • the upper side and the left side of the circuit board 2 have a gap 3 between the metal frame 1, and the first grounding point 8 is disposed on the left side of the circuit board 2 with the gap 3.
  • the portion between the metal frames 1 and the second grounding point 4 are disposed at a portion where the slit is located between the upper side of the circuit board 2 and the metal frame 1.
  • the gap 3 is formed between the left side of the circuit board 2 and the metal frame 1, and the first grounding point 8 and the second grounding point 4 are both disposed with the left side of the circuit board 2 and the metal frame 1. Within the gap (not shown).
  • the first grounding point 8, the feeding point 7, the second grounding point 4, the circuit board 2, the metal frame 1 and a portion of the slot 3 between the first grounding point 8 and the second grounding point 4 can form a slot antenna of the first working frequency band, and the wavelength of the first working frequency band is specifically a slot 3 for forming a slot of the first working frequency band.
  • the electrical length of the antenna portion is twice; at the same time, each antenna open branch and the first ground point 8, the feed point 7, the circuit board 2, the metal frame 1 and the slot 3 are located at the first ground point 8 and the antenna open branch
  • the partial connection between the connection points of the metal frame 1 forms a slot antenna of a working frequency band, and the wavelength of the working frequency band is a partial electrical length of the slot 3 between the first grounding point 8 and the connection point between the antenna open branch and the metal frame 1 double.
  • the first working frequency band and the other working frequency bands form an effective resonance through the gap between the circuit board and the metal frame, and the radiation efficiency of the slot antenna is not affected by the metal frame, so
  • the radiant power of the slot antenna in the required working frequency band is relatively high.
  • the slot antenna in the wireless mobile device can simultaneously meet the working requirements of the first working frequency band and the working frequency band corresponding to each antenna open branch, and improves the compactness of the wireless mobile device structure.
  • At least one antenna open branch in the wireless mobile device includes a first antenna open node 6 and a second antenna open node 5, and a connection point of the first antenna open branch 6 and the metal frame 1 is at a feeding point. Between the seventh grounding point 4 and the second grounding point 4, the connection point of the second antenna open branch 5 and the metal frame 1 is located between the connection point of the first antenna open branch 6 and the metal frame 1 and the second grounding point 4.
  • the electrical length of the first antenna open stub 6 is one-half of the electrical length between the first ground point 8 and the junction of the first antenna open stub 6 and the metal frame 1.
  • the electrical length of the second antenna open stub 5 is one-half the electrical length between the first ground point 8 and the junction of the second antenna open stub 5 and the metal frame 1.
  • a portion of the first grounding point 8 and the second grounding point 4, the feeding point 7, the gap 3 between the first grounding point 8 and the second grounding point 4, the metal frame 1 and the circuit board 2 may form a kind of a GPS slot antenna having a center resonant frequency of 1.575 GHz for receiving a GPS signal, and an electrical length of a portion of the slot 3 between the first ground point 8 and the second ground point 4 is a half wavelength of a resonant frequency in the GPS antenna;
  • An antenna open branch 6 and a first ground point 8, a feed point 7, a portion of the gap 3 between the first ground point 8 and a connection point of the first antenna open branch 6 and the metal frame 1, the metal frame 1 and the circuit board 2 cooperate to form a wireless local area network antenna with a resonant frequency of 5 GHz; at the same time, the second antenna open branch 5 and the first ground point 8, the feed point 7, the gap 3 are located at the first ground point 8 and the second antenna open branch 5 and the metal frame The portion between the connection points of 1
  • the first grounding point 8 and the second grounding point 4, the feeding point 7, the portion where the slot 3 is located between the first grounding point 8 and the second grounding point 4, the metal frame 1 and the circuit board 2 cooperate
  • the resonant frequency of the formed slot antenna is 1.575 Ghz, and the resonance of the antenna is in the GPS band, and the antenna can generate three resonances between 1.4-6 Ghz, as shown in FIG. 3, wherein the secondary mode is one wavelength, three modes. For 1.5 wavelengths, the ratio between their resonant frequencies is close to 1:2:3.
  • connection point of the first antenna open branch 6 and the metal frame 1 added at the slot 3 is
  • the electrical length between the first grounding point 8 is half wavelength of Wifi 5 GHz, and the electrical length of the first antenna open branch 6 is 1/4 wavelength of Wifi 5 GHz; under this condition, since the first antenna open branch 6 passes through 1 /4 wavelength impedance conversion, a short circuit occurs at the connection point of the first antenna open branch 6 and the metal frame 1, that is, a high current point.
  • this impedance transformation causes the effective ground point of the antenna to be connected from the second The position 4 is moved to the connection point of the first antenna open branch 6 and the metal frame 1, and the effective grounding points of other frequencies are unchanged, thus electrically reducing the size of the slot antenna, and the slot antenna can generate higher resonance.
  • Frequency ie 5GHz.
  • the second antenna open section 5 is used to cause the antenna to generate a resonant frequency of Wifi 2.4 GHz.
  • the result of the return loss of the above-mentioned wireless mobile terminal after adding the first antenna open section 6 and the second antenna open section 5 is as shown in FIG. 4, and the frequency band covers GPS, Wifi 2.4 GHz, Wifi 5.2 GHz and 5.8 GHz, and further Enables the antenna of a wireless mobile device to operate in these bands.
  • the width of the slit 3 is 0.5 mm or more, such as 0.5 mm, 0.55 mm, 0.6 mm, 0.7 mm, 0.75 mm, 0.8 mm, 0.9 mm, 0.95 mm, 1 mm, or the like.
  • the feeding point 7 can be set in various ways:
  • the feed point 7 may have a strip structure, and one end of the feed point 7 is connected to the circuit board 2, and the other end is connected to the metal frame 1. That is, the slot antenna in the wireless mobile device can be directly fed by the feed point 7 having a strip structure, so that the electric field at the feed point 7 is relatively strong.
  • the feed point 7 can also have a ring structure, and the feed point 7 is arranged on the circuit board 2 and is coupled to the metal frame 1 . That is, the slot antenna is fed by coupling.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

本发明涉及通信技术领域，公开一种无线移动设备，包括金属框架、设置于金属框架内的电路板，电路板的至少一个侧边与金属框架之间具有缝隙，第一接地点与电路板以及金属框架连接，第二接地点与电路板以及金属框架连接，馈入点位于第一接地点与第二接地点之间、且与电路板和金属框架连接；每一条天线开路枝节悬浮于所述电路板外侧空间、且一端跨过所述缝隙与所述金属框架连接，所述天线开路枝节与所述金属框架的连接点位于所述馈入点与所述第二接地点之间。上述无线移动设备中，多个频段天线均通过电路板与金属框架之间的缝隙形成谐振，天线的辐射效率不会受到金属框架的影响，因此，上述无线移动设备中缝隙天线在所需频段内的辐射功率都比较高，且无线移动设备中的天线结构紧凑性高。

Description

一种无线移动设备 技术领域
本发明涉及通信技术领域，特别涉及一种无线移动设备。
背景技术
在通信技术领域，无线移动设备具有便携性等优势。尤其是手机等移动设备，为了追求更加漂亮的外观，除了紧凑的整机尺寸外，越来越多的金属部件应用到了无线移动设备的设计中。
但是，在无线移动设备中，金属部件的引入在增加了无线移动设备外观美观性的同时会对无线移动设备中的天线性能造成很大的影响。
如图1所示，图1为现有技术中一种手机设置天线的结构示意图。图1所示的手机中，包括金属框架01、位于金属框架01内的电路板02，金属框架01与电路板012之间形成间隙012，上述手机中的主天线、分集天线、GPS天线的设计都是由金属框架01和电路板02之间的间隙012形产生谐振、然后再通过在间隙012内不同的位置设置接地点03以及馈入点04来控制缝隙天线的谐振频率。
现有技术中，间隙12虽然通过控制接地点和馈入点的位置来控制谐振频率，但产生的谐振频率为其主频率及其谐波，通常只能用于单一频段天线的设计。
发明内容
本发明提供了一种无线移动设备，该无线移动设备中具有至少一个可满足多个工作频段的工作需求的缝隙天线，提高了无线移动设备中结构的紧凑性。
第一方面，提供一种无线移动设备，包括金属框架、设置于所述金属框架内的电路板，所述电路板的至少一个侧边与所述金属框架之间具有缝隙，其特征在于，还包括：第一接地点、第二接地点、馈入点、至少一条天线开路枝节，其中：
所述第一接地点与所述电路板以及金属框架连接，所述第二接地点与所述电路板以及金属框架连接，所述馈入点位于所述第一接地点与所述第二接地点之间、且与所述电路板和所述金属框架连接；
每一条天线开路枝节悬浮于所述电路板外侧空间、且一端跨过所述缝隙与所述金属框架连接，所述天线开路枝节与所述金属框架的连接点位于所述馈入点与所述第二接地点之 间。
结合上述第一方面，在第一种可能的实现方式中，所述至少一条天线开路枝节包括第一天线开路枝节和第二天线开路枝节，所述第一天线开路枝节与所述金属框架的连接点位于所述馈入点和所述第二接地点之间，所述第二天线开路枝节与所述金属框架的连接点位于所述第一天线开路枝节与所述金属框架的连接点和所述第二接地点之间。
结合上述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，所述第一天线开路枝节的电长度为所述第一接地点和所述第一天线开路枝节与金属框架的连接点之间电长度的二分之一。
结合上述第一方面的第一种可能的实现方式，在第三种可能的实现方式中，所述第二天线开路枝节的电长度为所述第一接地点和所述第二天线开路枝节与金属框架的连接点之间电长度的二分之一。
结合上述第一方面，在第四种可能的实现方式中，所述缝隙的宽度大于等于0.5mm。
结合上述第一方面、第一方面的第一种可能的实现方式、第一方面的第二种可能的实现方式、第一方面的第三种可能的实现方式、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，所述馈入点位于所述第一接地点与所述第二接地点之间、且与所述电路板和所述金属框架连接，包括：
所述馈入点具有条形结构，且所述馈入点的一端与所述电路板连接，另一端与所述金属框架连接。
结合上述第一方面、第一方面的第一种可能的实现方式、第一方面的第二种可能的实现方式、第一方面的第三种可能的实现方式、第一方面的第四种可能的实现方式，在第一方面的第六种可能的实现方式中，所述馈入点位于所述第一接地点与所述第二接地点之间、且与所述电路板和所述金属框架连接，包括：
所述馈入点具有环形结构，所述馈入点设置于所述电路板、且与所述金属框架之间耦合连接。
上述第一方面提供的无线移动设备中，第一接地点与第二接地点、馈入点、缝隙位于第一接地点与第二接地点之间的部分、金属框架以及电路板配合可以形成第一工作频段的缝隙天线；并且，每一条天线开路枝节与第一接地点、馈入点、缝隙位于第一接地点与该天线开路枝节与金属框架连接点之间的部分、金属框架以及电路板配合形成其他谐振频率的天线。因此，上述无线移动设备中第一工作频段和其他工作频段均通过电路板与金属框架之间的缝隙形成有效的谐振，天线的辐射效率不会受到金属框架的影响，因此，上述无线移动设备中缝隙天线在所需工作频段内的辐射功率都比较高。上述无线移动设备中的缝隙天线同时满足第一工作频段以及每一个天线开路枝节对应的各工作频段的工作需求，提高了无线移动设备结构的紧凑性。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例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为现有技术中一种无线移动设备设置天线的结构示意图；
图2为本发明提供的一种无线移动设备中设置天线的结构示意图；
图3为缝隙天线的工作频段为1.5GHZ时的回波损耗示意图；
图4为本发明提供的一种无线移动设备中天线的回波损耗示意图。
具体实施方式
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，所描述的实施例仅仅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，都属于本发明保护的范围。
请参考图2，图2为本发明实施例提供的一种无线移动设备中设置天线的结构示意图。
如图2所示，本实施例提供的无线移动设备包括金属框架1、设置于金属框架1内的电路板2，电路板2的至少一个侧边与金属框架1之间具有缝隙3，上述无线移动设备还包括：第一接地点8、第二接地点4、馈入点7、至少一条天线开路枝节，如图2中所示的第一天线开路枝节6和第二天线开路枝节5；其中：
第一接地点8与电路板2以及金属框架1连接，第二接地点4与电路板2以及金属框架1连接，馈入点7位于第一接地点8与第二接地点4之间、且与电路板2和金属框架1连接；
同时，每一条天线开路枝节悬浮于电路板2的外侧空间、且一端跨过缝隙3与金属框架1连接，天线开路枝节与金属框架1的连接点位于馈入点7与第二接地点4之间。
如图2中所示方位，电路板2的上侧边和左侧边与金属框架1之间具有缝隙3，此时，第一接地点8设置于缝隙3位于电路板2的左侧边与金属框架1之间的部位，而第二接地点4设置于缝隙位于电路板2的上侧边与金属框架1之间的部位。
当然，还可以是电路板2的左侧边与金属框架1之间形成上述缝隙3，而第一接地点8和第二接地点4均设置与电路板2的左侧边与金属框架1之间的缝隙内(图中未示出)。
上述无线移动设备中，第一接地点8、馈入点7、第二接地点4、电路板2、金属框架 1以及缝隙3位于第一接地点8和第二接地点4之间的部分配合能够形成第一工作频段的缝隙天线，且第一工作频段波长具体为缝隙3用于形成第一工作频段的缝隙天线部分的电长度的两倍；同时，每一个天线开路枝节与第一接地点8、馈入点7、电路板2、金属框架1以及缝隙3位于第一接地点8和该天线开路枝节与金属框架1连接点之间的部分配合形成一种工作频段的缝隙天线，该工作频段的波长为缝隙3位于第一接地点8和该天线开路枝节与金属框架1连接点之间部分电长度的两倍。因此，上述无线移动设备中的缝隙天线中，第一工作频段和其他工作频段均通过电路板与金属框架之间的缝隙形成有效的谐振，缝隙天线的辐射效率不会受到金属框架的影响，因此，上述无线移动设备中缝隙天线在所需工作频段内的辐射功率都比较高。上述无线移动设备中的缝隙天线能够同时满足上述第一工作频段以及每一个天线开路枝节对应的工作频段的工作需求，提高了无线移动设备结构的紧凑性。
一种优选实施方式中，上述无线移动设备中的至少一条天线开路枝节包括第一天线开路枝节6和第二天线开路枝节5，第一天线开路枝节6与金属框架1的连接点位于馈入点7与第二接地点4之间，第二天线开路枝节5与金属框架1的连接点位于第一天线开路枝节6与金属框架1的连接点和第二接地点4之间。
且优选地，第一天线开路枝节6的电长度为第一接地点8与第一天线开路枝节6与金属框架1连接点之间电长度的二分之一。第二天线开路枝节5的电长度为第一接地点8和第二天线开路枝节5与金属框架1的连接点之间电长度的二分之一。
如，第一接地点8与第二接地点4、馈入点7、缝隙3位于第一接地点8与第二接地点4之间的部分、金属框架1以及电路板2配合可以形成一种中心谐振频率为1.575GHz的GPS缝隙天线，用于接收GPS信号，缝隙3位于第一接地点8与第二接地点4之间的部分的电长度为上述GPS天线中谐振频率的半波长；第一天线开路枝节6与第一接地点8、馈入点7、缝隙3位于第一接地点8和第一天线开路枝节6与金属框架1的连接点之间的部分、金属框架1以及电路板2配合形成谐振频率为5GHz的无线局域网天线；同时，第二天线开路枝节5与第一接地点8、馈入点7、缝隙3位于第一接地点8和第二天线开路枝节5与金属框架1的连接点之间的部分、金属框架1以及电路板2配合形成谐振频率为2.4Ghz的无线局域网天线。
上述无线移动设备中，第一接地点8与第二接地点4、馈入点7、缝隙3位于第一接地点8与第二接地点4之间的部分、金属框架1以及电路板2配合形成的缝隙天线的谐振频率为1.575Ghz，该天线的谐振在GPS频段，则该天线在1.4-6Ghz之间可以产生三个谐振，如图3所示，其中二次模为一个波长，三次模为1.5个波长，其谐振频率之间的比例接近1:2:3。
上述无线移动设备中，缝隙3处增加的第一天线开路枝节6与金属框架1的连接点到 第一接地点8之间的电长度为Wifi 5GHz的半波长，且第一天线开路枝节6的电长度为Wifi 5GHz的1/4波长；在此条件下，由于第一天线开路枝节6经过1/4波长的阻抗变换，在第一天线开路枝节6与金属框架1的连接点会产生短路，即高电流点，对Wifi 5GHz频段而言，这个阻抗变换导致天线的有效接地点从第二接地点4移动到了第一天线开路枝节6与金属框架1的连接点处，而其他频率的有效接地点不变，这样就从电气上缩小了缝隙天线的尺寸，可以使缝隙天线产生更高的谐振频率，即5GHz。基于同样的原理，第二天线开路枝节5用于使天线产生Wifi 2.4GHz的谐振频率。
上述无线移动终端添加了第一天线开路枝节6和第二天线开路枝节5后的回波损耗仿真结果如图4所示，其频段覆盖了GPS、Wifi2.4GHz、Wifi5.2GHz和5.8GHz，进而能够使无线移动设备的天线能够工作在这些频段。
优选地，在上述各实施方式的基础上，缝隙3的宽度大于等于0.5mm，如0.5mm、0.55mm、0.6mm、0.7mm、0.75mm、0.8mm、0.9mm、0.95mm、1mm等。
上述各实施方式提供的无线移动设备中，馈入点7的设置方式可以有多种：
如图2中所示，馈入点7可以具有条形结构，且馈入点7的一端与电路板2连接，另一端与金属框架1连接。即无线移动设备中的缝隙天线可以由具有条形结构的馈入点7直接馈电，进而使馈入点7处的电场比较强。
当然，馈入点7还可以具有环形结构，馈入点7设置于电路板2、且与金属框架1之间耦合连接。即缝隙天线通过耦合馈电。
显然，本领域的技术人员可以对本发明实施例进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。

Claims (7)

  1. 一种无线移动设备，包括金属框架、设置于所述金属框架内的电路板，所述电路板的至少一个侧边与所述金属框架之间具有缝隙，其特征在于，还包括：第一接地点、第二接地点、馈入点、至少一条天线开路枝节，其中：
    所述第一接地点与所述电路板以及金属框架连接，所述第二接地点与所述电路板以及金属框架连接，所述馈入点位于所述第一接地点与所述第二接地点之间、且与所述电路板和所述金属框架连接；
    每一条天线开路枝节悬浮于所述电路板外侧空间、且一端跨过所述缝隙与所述金属框架连接，所述天线开路枝节与所述金属框架的连接点位于所述馈入点与所述第二接地点之间。
  2. 根据权利要求1所述的无线移动设备，其特征在于，所述至少一条天线开路枝节包括第一天线开路枝节和第二天线开路枝节，所述第一天线开路枝节与所述金属框架的连接点位于所述馈入点和所述第二接地点之间，所述第二天线开路枝节与所述金属框架的连接点位于所述第一天线开路枝节与所述金属框架的连接点和所述第二接地点之间。
  3. 根据权利要求2所述的无线移动设备，其特征在于，所述第一天线开路枝节的电长度为所述第一接地点和所述第一天线开路枝节与金属框架的连接点之间电长度的二分之一。
  4. 根据权利要求2所述的无线移动设备，其特征在于，所述第二天线开路枝节的电长度为所述第一接地点和所述第二天线开路枝节与金属框架的连接点之间电长度的二分之一。
  5. 根据权利要求1所述的无线移动设备，其特征在于，所述缝隙的宽度大于等于0.5mm。
  6. 根据权利要求1～5任一项所述的无线移动设备，其特征在于，所述馈入点位于所述第一接地点与所述第二接地点之间、且与所述电路板和所述金属框架连接，包括：
    所述馈入点具有条形结构，且所述馈入点的一端与所述电路板连接，另一端与所述金属框架连接。
  7. 根据权利要求1～5任一项所述的无线移动设备，其特征在于，所述馈入点位于所述第一接地点与所述第二接地点之间、且与所述电路板和所述金属框架连接，包括：
    所述馈入点具有环形结构，所述馈入点设置于所述电路板、且与所述金属框架之间耦合连接。
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