WO2014000582A1 - 一种手机的3g天线及3g手机 - Google Patents

一种手机的3g天线及3g手机 Download PDF

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Publication number
WO2014000582A1
WO2014000582A1 PCT/CN2013/077328 CN2013077328W WO2014000582A1 WO 2014000582 A1 WO2014000582 A1 WO 2014000582A1 CN 2013077328 W CN2013077328 W CN 2013077328W WO 2014000582 A1 WO2014000582 A1 WO 2014000582A1
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WIPO (PCT)
Prior art keywords
antenna
mobile phone
slot
frequency
low
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PCT/CN2013/077328
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English (en)
French (fr)
Inventor
潘灵建
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惠州Tcl移动通信有限公司
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Publication of WO2014000582A1 publication Critical patent/WO2014000582A1/zh

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Classifications

    • 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
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/42—Resonant 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
    • 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
    • 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

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a 3G antenna and a 3G antenna of a mobile phone. Background technique
  • the mobile phone In the existing smart phones, the internals often use a broken board structure—the mobile phone includes a mobile phone main board and a mobile phone sub-board, and the mobile phone main board is separated from the mobile phone sub-board by a coaxial cable.
  • the structure is designed for mainstream brands used in mainstream full-screen smartphones, such as Samsung, Huawei, ZTE, Lenovo, TCL and other smart phones.
  • the biggest advantage is that the battery can be designed between the mobile phone motherboard and the mobile phone sub-board, which makes the mobile phone thinner and the battery capacity larger.
  • this design method also makes the design environment of the mobile phone antenna worse and worse, such as: speakers, microphones, USB interfaces and other devices that have a great influence on the performance of the antenna are placed in the antenna area, but the antenna requirements are getting higher and higher, especially The bandwidth that the antenna needs to meet must meet the range of the 3G frequency band (higher than the bandwidth requirement of the previous 2G).
  • the bandwidth of the low frequency is affected, the radiated power of the low frequency is relatively low, and the receiving sensitivity of the low frequency is also deteriorated.
  • the traditional IFA antenna is not parasitic, the high frequency has only one resonance, which can only satisfy the antenna performance of the existing 2G mobile phone, and cannot meet the bandwidth requirement of the current mainstream smartphone 3G frequency band. Therefore, the structure of the antenna of the mobile phone needs to be improved. Summary of the invention
  • the present invention aims to provide a 3G antenna and a 3G mobile phone for a mobile phone, and to improve the performance of the antenna for the existing broken design structure of the ultra-thin full-screen smart phone to ensure good communication. .
  • a 3G antenna of a mobile phone comprising a low frequency trace, a high frequency trace, a location and a feed point, wherein a first slot is disposed between the low frequency trace and the high frequency trace, and one end of the low frequency trace One end of the high frequency trace is separated by the first slot, and the other end of the low frequency trace is connected to the other end of the high frequency trace; the location is located outside the feed point, at the location and feed point A second slot is disposed between the second slot and the second slot has at least one slot.
  • the extending slots are two.
  • the extending slot is disposed along a direction of the first slot.
  • the other end of the low frequency trace is connected to the other end of the high frequency trace.
  • the length of the low frequency trace is greater than the length of the high frequency trace.
  • the second slot is located at the top of the area enclosed by the point and the feed point.
  • a 3G mobile phone includes a mobile phone motherboard, a battery compartment, a mobile phone sub-board and a coaxial cable.
  • the battery compartment is located between the mobile phone motherboard and the mobile phone sub-board, and the mobile phone mainboard is connected to the mobile phone sub-board through a coaxial cable.
  • a 3G antenna and a 3G antenna are provided on the handset board. Matching and RF modules;
  • the 3G antenna includes a low frequency trace, a high frequency trace, a location, and a feed point, and a first slot is disposed between the low frequency trace and the high frequency trace, and one end of the low frequency trace and the high frequency trace One end is separated by the first slot, and the other end of the low frequency trace is connected to the other end of the high frequency trace; the location is located outside the feed point, and between the location and the feed point is disposed a second slot, and the second slot has at least one extending slot;
  • the 3G antenna is matched with a first capacitor, a second capacitor, a first inductor, and a second inductor.
  • the 3G antenna is connected to the radio frequency module through a first inductor and a second capacitor, and one end of the first capacitor is connected to the 3G antenna.
  • One end of the first inductor is grounded, and the other end is connected to one end of the second capacitor and the RF module, and the other end is grounded.
  • the extension slots are two.
  • the length of the low frequency trace is greater than the length of the high frequency trace.
  • the extending slot is disposed along a direction of the first slot.
  • the 3G antenna and the 3G mobile phone of the mobile phone provided by the present invention include a low frequency trace, a high frequency trace, a place and a feed point, and the low frequency trace and the high frequency trace are set. a first slot, one end of the low frequency trace and one end of the high frequency trace are separated by the first slot, and the other end of the low frequency trace is connected to the other end of the high frequency trace. A second slot is disposed between the location and the feed point, and the second slot has at least one extension slot.
  • the structure of the 3G antenna is such that the high and low frequencies of the antenna have less influence on each other, thereby being in a very harsh environment.
  • the 3G antenna of the present invention uses one parastation with respect to the common antenna trace, which reduces the cost of the 3G antenna and achieves better performance of the antenna.
  • FIG. 1 is a schematic diagram of a wiring of a 3G antenna of a mobile phone according to the present invention.
  • FIG. 2 is a schematic diagram of resonance of a 3G antenna of the mobile phone of the present invention.
  • 3 is a schematic structural view of a 3G mobile phone of the present invention.
  • FIG. 4 is a schematic diagram of 3G antenna matching of a 3G mobile phone according to the present invention.
  • the invention provides a 3G antenna and a 3G mobile phone.
  • a 3G antenna and a 3G mobile phone By designing a new 3G antenna and matching with the 3G antenna, a wider bandwidth can be obtained in a state where the antenna environment is poor and the antenna height is low, so that the bandwidth can be obtained. Get better OTA (Over - the - Air Technology) performance.
  • FIG. 1 is a schematic diagram of a 3G antenna of a mobile phone of the present invention.
  • the figure is a schematic diagram of the 3G antenna of the present invention being developed into a 2D state.
  • the 3G antenna is folded into a body shape (such as a cylinder, a square column, etc.) and attached to the mobile phone.
  • the 3G antenna of the mobile phone provided by the present invention includes a low frequency trace 100, a high frequency trace 200, a location 300, and a feed point 400.
  • a first slot 101 is disposed between the low frequency trace 100 and the high frequency trace 200, and the length and width of the first slot 101 can be controlled.
  • the high-frequency and low-frequency resonance of the antenna is different in the form of the high-frequency line wrapped by the conventional low-frequency trace, that is, the end of the high-frequency trace 200 is not wrapped by the low-frequency trace 100.
  • the length of the low frequency trace 100 is greater than the length of the high frequency trace 200, so that the high and low frequencies of the antenna have little influence on each other, so that good efficiency can be radiated in a very harsh environment.
  • one end of the low frequency trace 100 and one end of the high frequency trace 200 are separated by the first slot 101 , and the other end of the low frequency trace 100 and the other end of the high frequency trace 200 Connected at one end.
  • the other end of the low frequency trace 100 is connected to the other end of the high frequency trace 200, that is, the other end of the low frequency trace 100 is integrally provided with the other end of the high frequency trace 200.
  • one end of the low frequency trace 100 and one end of the high frequency trace 200 are not connected, and the other end of the low frequency trace 100 is connected to the other end of the high frequency trace 200, that is, the antenna Low- and high-frequency traces are a whole, not two separate parts.
  • the location 300 is located outside the feed point 400, that is, the feed point 400 is closer to the middle of the antenna than the location 300.
  • a second slot 301 is disposed between the location 300 and the feed point 400.
  • the depth and direction of the second slot 301 can be set according to actual debugging conditions, and the second slot 301 has at least one slot. 302, mainly used to control the bandwidth of high frequencies.
  • the second slot 301 is located at a top end of a region enclosed between the location 300 and the feed point 400.
  • the extension slot 302 is two, and the extension slot 302 is disposed along the direction of the first slot 101.
  • the two extending slots 302 respectively extend in two directions of the second slot 301 to form a "T"-shaped structure, so that the high frequency of the 3G antenna exhibits a second resonance, thereby increasing the high frequency bandwidth, and the resonance diagram thereof is as follows.
  • Figure 2 shows.
  • B1 represents The resonance generated by the low frequency trace 100
  • B2 represents the resonance produced by the high frequency trace 200
  • B3 represents the resonance generated by the extension slot 302.
  • the length and width of the first slot 101, the second slot 301, and the extension slot 302 are not limited, and may be finely adjusted according to actual conditions, as long as the resonance requirement of the 3G antenna can be met, and the extension is
  • the slots 302 may be one or two.
  • the direction of the extending groove 302 can also be arbitrarily set as long as the resonance B3 can be generated, so that the resonance depth of the B3 can satisfy the requirements of the 3G antenna.
  • the embodiment of the present invention may first try to extend one of the slots. For example, if the extension slot 302 extends to the left side of the 3G antenna, if the resonance B3 becomes deeper during the test, it is debugged. When the frequency of the 3G antenna is within the required frequency range, and the depth of the resonance reaches the efficiency requirement of the 3G antenna, the other slot may not be extended (ie, the right slot of the 3G antenna may not be provided with the second slot 301 extending the slot 302) In this case, only one extension slot is needed.
  • the extending slot 302 can change the resonant depth of B3, because the depth of the resonance changes the efficiency of the antenna. Specifically, several extending slots 302 can be used in combination with a specific mobile phone for debugging.
  • the present invention separates the high frequency trace 200 of the antenna from the low frequency trace 100 through the first slot 101, and controls the resonance of the antenna high frequency and low frequency by the length and width of the first slot 101.
  • the low frequency trace 100 is long and the high frequency trace 200 is short, so that the interaction between the high and low frequencies is small, so that good efficiency can be radiated in a very harsh environment.
  • the 3G antenna of the present invention only needs one feed point 400 and one ground point 300.
  • the 3G antenna of the present invention uses less parasitic than the common antenna trace, and the antenna can be reduced. Cost, but also achieve better sex
  • a second slot 301 is opened between the feed point 400 and the location 300.
  • the depth and direction of the second slot 301 are controlled according to actual debugging, and the second slot 301 extends to the high frequency trace 200.
  • the extending slot 302 is coupled to the second resonance of the high frequency. After the high frequency resonance caused by the extending slot 302, the length of the extending slot 302 can be adjusted to match the RF module of the mobile phone. Higher efficiency and power.
  • the embodiment further provides a 3G mobile phone.
  • the mobile phone motherboard 10, the battery compartment 20, the mobile phone sub-board 30, and the coaxial cable 40, the battery compartment. 20 is located between the mobile phone motherboard 10 and the mobile phone sub-board 30.
  • the mobile phone main board 10 and the mobile phone sub-board 30 are connected by a coaxial cable 40 having standard interfaces at both ends.
  • a 3G antenna, a 3G antenna matching 31, and a radio frequency module 32 are disposed on the handset sub-board 30.
  • the 3G antenna has been described in detail above and will not be described here.
  • the 3G antenna matching 31 includes a first capacitor C1, a second capacitor C2, a first inductor L1, and a second inductor L2.
  • the 3G antenna sequentially passes through the first inductor L1 and the second capacitor C2.
  • the RF module 32 is connected.
  • One end of the first capacitor C1 is connected to one end of the 3G antenna and the first inductor L1, the other end of the first capacitor C1 is grounded, and one end of the second inductor L2 is connected to one end of the second capacitor C2 and the radio frequency module 32.
  • the other end of the second inductor L2 is grounded.
  • the capacitance of the first capacitor CI is smaller than the second capacitor C2, and the capacitance of the first capacitor C1 is preferably 0.5 pF to 3 pF, and the capacitance of the second capacitor C2 is preferably
  • the inductance of the first inductor L1 is smaller than the inductance of the second inductor L2, wherein the inductance of the first inductor L1 is preferably lnh ⁇ 3.9nh, and the inductance of the second inductor L2 is preferably 10nl! ⁇ 22nh.
  • the present invention is directed to the design of a full-screen intelligent 3G mobile phone with a built-in PIAF/IFA (a PIFA antenna is a planar inverted F antenna and an IFA antenna is an inverted F antenna) to implement GSM (Global System for Mobile Communications, Global System for Mobile Communications) 900/DCS/PCS, and Bandl/2/4/5/8 or CDMA cell/pcs/AWS bands or GSM900/DCS1800 (Digital Cellular System at 1800MHz, 1800MHz Digital Cellular System)/TDSCDMA-A
  • the frequency band (TDSCDMA is Time Division-Synchronous Code Division Multiple Access, which is in the range of 2010 ⁇ 2025Mhz), so that the mobile phone antenna satisfies the ⁇ and SAR (Specific Absorption Ratio) & HAC ( Hearing Aid Compatibility, hearing aid compatibility).
  • the table below shows the results in the 3G test.
  • TRP total radiant power
  • TIS total omnidirectional sensitivity
  • WCDMABC2 20.3 20.5 20.5 -108.1
  • the conventional antenna has poor performance due to the increase of parasitic, and the low frequency performance is improved after the 3G antenna of the present invention is used, and the high frequency performance is superior to the conventional antenna.
  • the SAR&HAC test results in the working frequency bands of the 3G antenna are as follows:
  • the 3G antenna fabricated by the embodiment of the present invention has no increase in the SAR/HAC value of the GSM850 band when the total radiated power TRP is superior to the conventional antenna, and the high frequency PCS1900 In the case of a large increase in TRP, the HAC has declined, which has clear guiding significance. It can be seen that the performance of the 3G antenna of the present invention can meet the high-end requirements of the European and American markets through FCC certification.
  • the present invention couples the second resonance of the high frequency through the slot between the feed point and the place, and can not match the efficiency output of the low frequency, and can also match the low frequency to the mobile phone RF module through fine adjustment.
  • the high frequency bandwidth is improved, thereby improving the performance of the antenna and ensuring good communication.
  • the 3G antenna of the present invention does not need to increase parasitic, and has lower cost and better performance than conventional antennas.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Support Of Aerials (AREA)
  • Waveguide Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

本发明公开了一种手机的3G天线及3G手机，其3G天线包括低频走线、高频走线、地点和馈点，所述低频走线和高频走线之间设置有第一开槽，所述低频走线的一端和高频走线的一端被所述第一开槽隔开，所述低频走线的另一端与高频走线的另一端连接；所述地点位于馈点的外侧，在所述地点和馈点之间设置有第二开槽，且所述第二开槽具有至少一延伸槽。本发明使得天线的高低频相互影响较小，从而在很恶劣的环境下能辐射出很好的效率，并且通过延伸槽能耦合出高频的第二个谐振，提升了高频带宽，从而提升了天线的性能，保证良好的通信。

Description

一种手机的 3G天线及 3G手机 技术领域
本发明涉及通信技术领域， 特别涉及一种手机的 3G天线及 3G 天线。 背景技术
现有的智能手机，其内部往往采用断板结构——手机包括手机主 板和手机子板， 手机主板与手机子板分开， 通过一根同轴线缆连接。 该结构设计在主流全屏智能手机中运用的主流品牌，如：三星、华为、 中兴、联想、 TCL等智能手机。 其最大优势是电池可设计在手机主板 和手机子板之间， 从而使手机变的更加薄， 电池容量更加大。 但是这 种设计方式也使得手机天线的设计环境越来越差， 如： 喇叭、 麦克、 USB接口等对天线性能影响较大的器件都放到天线区域， 但是天线 要求却越来越高， 特别是天线所需满足的带宽都要满足 3G频段的范 围 （比以往 2G的带宽要求更高）。
目前， 一般采用在传统天线走线上增加寄生来增加带宽， 其缺点 是低频的带宽会受到影响， 低频的辐射功率会比较低， 低频的接收灵 敏度也会变差。 传统的 IFA天线如果不加寄生， 高频只有一个谐振， 只能满足现有的 2G手机的天线性能，不能满足现在主流智能手机 3G 频段的带宽要求。 因此， 手机的天线的结构需要进行改进。 发明内容
鉴于上述现有技术的不足之处，本发明的目的在于提供一种手机 的 3G天线及 3G手机，针对现有超薄全屏智能手机的断板设计结构， 提升天线的性能， 以确保良好的通信。
为了达到上述目的， 本发明采取了以下技术方案：
一种手机的 3G天线， 其包括低频走线、 高频走线、地点和馈点， 所述低频走线和高频走线之间设置有第一开槽，所述低频走线的一端 和高频走线的一端被所述第一开槽隔开，所述低频走线的另一端与高 频走线的另一端连接； 所述地点位于馈点的外侧， 在所述地点和馈点 之间设置有第二开槽 , 且所述第二开槽具有至少一延伸槽。
所述的手机的 3G天线中， 所述延伸槽为两条。
所述的手机的 3G天线中， 所述延伸槽沿第一开槽的方向设置。 所述的手机的 3G天线中， 所述低频走线的另一端与高频走线的 另一端连通。
所述的手机的 3G天线中， 所述低频走线的长度大于高频走线的 长度。
所述的手机的 3G天线中， 所述第二开槽位于地点与馈点之间包 围的区域的顶端。
一种 3G手机， 包括手机主板、 电池仓、 手机子板和同轴线缆， 所述电池仓位于手机主板和手机子板之间，所述手机主板通过同轴线 缆与手机子板连接， 其中， 在手机子板上设置有 3G天线、 3G天线 匹配和射频模块；
所述 3G天线包括低频走线、 高频走线、 地点和馈点， 所述低频 走线和高频走线之间设置有第一开槽，所述低频走线的一端和高频走 线的一端被所述第一开槽隔开，所述低频走线的另一端与高频走线的 另一端连接； 所述地点位于馈点的外侧， 在所述地点和馈点之间设置 有第二开槽， 且所述第二开槽具有至少一延伸槽；
所述 3G天线匹配包括第一电容、 第二电容、 第一电感和第二电 感， 所述 3G天线依次通过第一电感和第二电容与射频模块连接， 所 述第一电容的一端连接 3G天线和第一电感的一端， 另一端接地， 第 二电感的一端连接第二电容的一端和射频模块， 另一端接地。
所述的 3G手机中， 所述延伸槽为两条。
所述的 3G手机中， 所述低频走线的长度大于高频走线的长度。 所述的 3G手机中 , 所述延伸槽沿第一开槽的方向设置。
相较于现有技术， 本发明提供的手机的 3G天线及 3G手机， 其 3G天线包括低频走线、 高频走线、 地点和馈点， 所述低频走线和高 频走线之间设置有第一开槽，所述低频走线的一端和高频走线的一端 被所述第一开槽隔开，所述低频走线的另一端与高频走线的另一端连 接， 在所述地点和馈点之间设置有第二开槽， 且所述第二开槽具有至 少一延伸槽， 这种 3G天线的结构设计使得天线的高低频相互影响较 小， 从而在很恶劣的环境下能辐射出很好的效率， 并且通过延伸槽能 耦合出高频的第二个谐振，提升了高频带宽，从而提升了天线的性能， 保证良好的通信。 同时， 相对于普通天线走线， 本发明的 3G天线少用一个寄生， 在降低了 3G天线的成本的同时， 使天线达到了更好的性能。 附图说明
图 1为本发明手机的 3G天线的走线示意图。
图 2为本发明手机的 3G天线的谐振示意图。
图 3为本发明 3G手机的结构示意图。
图 4为本发明 3G手机的 3G天线匹配示意图。
具体实施方式
本发明提供一种 3G天线及 3G手机， 通过设计新的 3G天线走 线， 并配合该 3G天线的匹配， 在天线环境较差、 天线高度较低的状 态下能获得较宽的带宽， 从而能获得更好的 OTA(Over - the - Air Technology , 空中下载技术)性能。
为使本发明的目的、 技术方案及效果更加清楚、 明确， 以下参照 附图并举实施例对本发明进一步详细说明。应当理解， 此处所描述的 具体实施例仅用以解释本发明， 并不用于限定本发明。
请参阅图 1 , 图 1为本发明手机的 3G天线的走线示意图。 该图 是本发明 3G天线走线展开成 2D状态的示意， 在实际使用时， 3G天 线会折成立体形状（如圓柱、 方柱等）贴在手机上。
如图 1所示， 本发明提供的手机的 3G天线包括低频走线 100、 高频走线 200、 地点 300和馈点 400。 所述低频走线 100和高频走线 200之间设置有第一开槽 101 , 该第一开槽 101的长度和宽度可以控 制天线高频与低频的谐振，其走线形式与传统低频走线包裹高频直线 的形式不同， 即高频走线 200的末端没有被低频走线 100包裹。
本实施例中，所述低频走线 100的长度大于高频走线 200的长度， 使天线的高、低频之间相互影响较小， 从而在很恶劣的环境下能辐射 出很好的效率。
请继续参阅图 1 , 所述低频走线 100的一端和高频走线 200的一 端被所述第一开槽 101隔开，所述低频走线 100的另一端与高频走线 200的另一端连接。 此处可理解为， 所述低频走线 100的另一端与高 频走线 200的另一端连通， 即低频走线 100的另一端与高频走线 200 的另一端一体设置。 所述此处可理解为， 低频走线 100的一端和高频 走线 200的一端没有连接， 而低频走线 100的另一端与高频走线 200 的另一端是有连接的， 即天线的低、 高频走线是一个整体， 而不是独 立的两部分。
其中， 所述地点 300位于馈点 400的外侧， 即馈点 400相对地点 300更靠近天线的中部。 在所述地点 300和馈点 400之间设置有第二 开槽 301 , 该第二开槽 301的深度和方向可根据实际调试情况进行设 置， 且所述第二开槽 301具有至少一延伸槽 302, 主要用于控制高频 的带宽。优选地， 所述第二开槽 301位于地点 300与馈点 400之间包 围的区域的顶端， 所述延伸槽 302为两条， 且延伸槽 302沿第一开槽 101的方向设置。 即两条延伸槽 302分别向第二开槽 301的两个方向 延伸， 组成类似 "T" 字型结构， 使 3G天线的高频出现第二个谐振， 从而增加高频带宽， 其谐振示意图如图 2所示。 在图 2中， B1表示 低频走线 100产生的谐振， B2表示高频走线 200产生的谐振， B3表 示延伸槽 302产生的谐振。
应当说明的是， 本发明对第一开槽 101、 第二开槽 301、 延伸槽 302的长度、 宽度没有限制， 可以根据实际情况进行微调， 只要能满 足 3G天线的谐振要求即可， 而且延伸槽 302可以为一条， 也可以为 两条。 所述延伸槽 302的方向也可以任意设置， 只要能产生谐振 B3 , 使 B3的谐振深度满足 3G天线的要求即可。
请结合图 1和图 2, 在具体实施时， 本发明实施例可以先尝试延 伸其中的一条槽， 如延伸槽 302向 3G天线左侧延伸后， 在测试时如 果谐振 B3变深， 在调试到了 3G天线所需的频率范围内， 并且谐振 的深度达到了 3G天线所需的效率要求时，可以不去延伸另一条槽（即 3G天线的右侧可以不设置第二开槽 301延伸槽 302 ), 这种情况只需 要一条延伸槽。 当延伸其中一条槽后， 如果谐振 B3变深， 但是谐振 依然没有到达 3G天线所需的频率范围内或者天线的效率不够， 此时 增加另一条延伸槽， 来改变谐振 B3的中心频率， 另一条延伸槽 302 可以改变 B3的谐振深度， 因为谐振的深度会改变天线的效率， 具体 先用几条延伸槽 302可结合具体的手机进行调试。
请继续参阅图 1 , 本发明将天线的高频走线 200与低频走线 100 通过第一开槽 101分开，并通过第一开槽 101的长短与宽度来控制天 线高频与低频的谐振，并且使低频走线 100较长、高频走线 200较短， 使高低频之间相互影响较小，从而在很恶劣的环境下能辐射出很好的 效率。 而且，本发明的 3G天线只需要一个馈点 400和一个接地点 300, 针对现有 3G手机的高带宽要求，相对于普通天线走线，本发明的 3G 天线少用了一个寄生， 可以降低天线的成本， 同时还可达到更好的性
•6匕
匕。
同时， 在馈点 400与地点 300之间开第二开槽 301 , 该第二开槽 301的深度与方向根据实际调试中进行控制， 并且第二开槽 301延伸 到高频走线 200, 通过该延伸槽 302耦合出高频的第二个谐振， 当延 伸槽 302引起的高频谐振出来后，还可以通过对延伸槽 302的长短或 是粗细微调，从而与手机的射频模块匹配，来输出更高的效率和功率。
基于上述的手机的 3G天线，本实施例还对应提供一种 3G手机， 如图 3所示， 其包括手机主板 10、 电池仓 20、 手机子板 30和同轴线 缆 40, 所述电池仓 20位于手机主板 10和手机子板 30之间 , 所述手 机主板 10与手机子板 30通过两端具有标准接口的同轴线缆 40连接。 在所述手机子板 30上设置有 3G天线、 3G天线匹配 31和射频模块 32。 其中， 3G天线在上文已进行了详细描述， 此处不再贅述。
请一并参阅图 4, 所述 3G天线匹配 31包括第一电容 Cl、 第二 电容 C2、第一电感 L1和第二电感 L2,所述 3G天线依次通过第一电 感 L1和第二电容 C2与射频模块 32连接， 所述第一电容 C1的一端 连接 3G天线和第一电感 L1的一端， 第一电容 C1的另一端接地， 第 二电感 L2的一端连接第二电容 C2的一端和射频模块 32, 第二电感 L2的另一端接地。 具体实施时， 所述第一电容 CI的容值比第二电容 C2小， 第一 电容 C1的容值优选为 0.5pF〜3pF, 第二电容 C2的容值优选为
6.8pF〜22pF。第一电感 L1的电感量比第二电感 L2的电感量小，其中， 第一电感 L1的电感量优选为 lnh〜3.9nh, 第二电感 L2的电感量优选 为 10nl！〜 22nh。
为了便于理解， 本发明针对配合内置的 PIAF/IFA ( PIFA天线为 平面倒 F天线， IFA天线为倒 F天线）形式的 3G天线的全屏智能 3G 手机的设计， 实现 GSM ( Global System for Mobile Communications, 全球移动通讯系统 ) 900/DCS/PCS、 以及 Bandl/2/4/5/8或 CDMA cell/pcs/AWS频段或是 GSM900/DCS1800 ( Digital Cellular System at 1800MHz, 1800MHz数字蜂窝系统）/TDSCDMA-A频段（ TDSCDMA 为时分同步的码分多址技术 Time Division-Synchronous Code Division Multiple Access, A频段范围在 2010 ~ 2025Mhz )频段工作 , 使手机 天线满足 ΟΤΑ以及 SAR( Specific Absorbtion Ratio,比吸收率）&HAC ( Hearing Aid Compatibility,助听器兼容性 )的要求。下表分别为在 3G 试结果。
在 3G天线各工作频段内的 OTA测试结果如下： 传统天线
TRP (总辐射功率 ) TIS (总全向灵敏度） (加寄生）
GSM850 26.7 27.2 28.1 -104.3
GSM900 28.2 28.7 28.3 -103.1
DCS 1800 25.5 25.9 26.3 -104.8
PCS 1900 26.8 26.7 25.7 -104.2
WCDMABC1 19.9 20.2 20.0 -106.1
WCDMABC2 19.5 20.1 20.4 -105.8
WCDMABC8 19.2 19.5 19.2 -105.2 本发明的 3G
TRP TIS
天线
GSM850 28.2 29.1 28.7 -104.9
GSM900 28.6 29.7 29.1 -105.7
DCS 1800 26.5 27.1 26.9 -106.8
PCS 1900 26.9 27.3 27.1 -106.9
WCDMABC1 20.9 21.2 20.8 -107.8
WCDMABC2 20.3 20.5 20.5 -108.1
WCDMABC8 19.7 20.1 20.0 -106.5
从上表可以看出 ,传统天线因为增加寄生，所以低频的性能很差， 而采用了本发明的 3G天线后， 低频的性能有所提升， 同时高频的性 能更优于传统天线。 在 3G天线各工作频段内的 SAR&HAC测试结果如下:
Figure imgf000012_0001
从上表可以看出， 采用本发明实施例制作而成的 3G天线在总辐 射功率 TRP优于传统天线的情况下， GSM850频段的 SAR/HAC值的 测试结果并没有增加， 而高频 PCS1900的频段在 TRP提升较多的情 况下 HAC反而有所下降， 具有明确的指导意义。 可见本发明的 3G 天线的性能可以通过 FCC认证满足欧美市场高端要求。
综上所述， 本发明通过馈点、地点之间的开槽耦合出高频的第二 个谐振， 并且在不影响低频的效率输出的同时， 还能通过微调使低频 更加与手机射频模块匹配，来获得更高的辐射功率和更好的接收灵敏 度， 提升了高频带宽， 从而提升了天线的性能， 保证良好的通信。 而 且本发明的 3G天线不需要增加寄生， 与传统天线相比， 其成本低， 性能能更优。
可以理解的是， 对本领域普通技术人员来说， 可以根据本发明的技术 方案及其发明构思加以等同替换或改变，而所有这些改变或替换都应 属于本发明所附的权利要求的保护范围。

Claims

权 利 要 求 书
1、 一种手机的 3G天线， 其特征在于， 包括低频走线、 高频走 线、 地点和馈点， 所述低频走线和高频走线之间设置有第一开槽， 所 述低频走线的一端和高频走线的一端被所述第一开槽隔开，所述低频 走线的另一端与高频走线的另一端连接； 所述地点位于馈点的外侧， 在所述地点和馈点之间设置有第二开槽 ,且所述第二开槽具有至少一 延伸槽。
2、 根据权利要求 1所述的手机的 3G天线， 其特征在于， 所述 延伸槽为两条。
3、 根据权利要求 2所述的手机的 3G天线， 其特征在于， 两条 延伸槽分别向第二开槽的两个方向延伸。
4、 根据权利要求 1所述的手机的 3G天线， 其特征在于， 所述 低频走线的另一端与高频走线的另一端连通。
5、 根据权利要求 1所述的手机的 3G天线， 其特征在于， 所述 低频走线的长度大于高频走线的长度。
6、 根据权利要求 1所述的手机的 3G天线， 其特征在于， 所述 第二开槽位于地点与馈点之间包围的区域的顶端。
7、 一种手机的 3G天线， 其特征在于， 包括低频走线、 高频走 线、 地点和馈点， 所述低频走线和高频走线之间设置有第一开槽， 所 述低频走线的一端和高频走线的一端被所述第一开槽隔开，所述低频 走线的另一端与高频走线的另一端连接； 所述地点位于馈点的外侧， 在所述地点和馈点之间设置有第二开槽 ,且所述第二开槽具有至少一 延伸槽， 所述延伸槽沿第一开槽的方向设置。
8、 根据权利要求 7所述的手机的 3G天线， 其特征在于， 所述 延伸槽为两条。
9、 根据权利要求 8所述的手机的 3G天线， 其特征在于， 两条 延伸槽分别向第二开槽的两个方向延伸。
10、 根据权利要求 7所述的手机的 3G天线， 其特征在于， 所述 低频走线的另一端与高频走线的另一端连通。
11、 根据权利要求 7所述的手机的 3G天线， 其特征在于， 所述 低频走线的长度大于高频走线的长度。
12、 根据权利要求 7所述的手机的 3G天线， 其特征在于， 所述 第二开槽位于地点与馈点之间包围的区域的顶端。
13、 一种 3G手机， 包括手机主板、 电池仓、 手机子板和同轴线 缆， 所述电池仓位于手机主板和手机子板之间， 所述手机主板通过同 轴线缆与手机子板连接，其特征在于，在手机子板上设置有 3G天线、 3G天线匹配和射频模块；
所述 3G天线包括低频走线、 高频走线、 地点和馈点， 所述低频 走线和高频走线之间设置有第一开槽，所述低频走线的一端和高频走 线的一端被所述第一开槽隔开，所述低频走线的另一端与高频走线的 另一端连接； 所述地点位于馈点的外侧， 在所述地点和馈点之间设置 有第二开槽， 且所述第二开槽具有至少一延伸槽；
所述 3G天线匹配包括第一电容、 第二电容、 第一电感和第二电 感， 所述 3G天线依次通过第一电感和第二电容与射频模块连接， 所 述第一电容的一端连接 3G天线和第一电感的一端， 另一端接地， 第 二电感的一端连接第二电容的一端和射频模块， 另一端接地。
14、 根据权利要求 13所述的 3G手机， 其特征在于， 所述延伸 槽为两条。
15、 根据权利要求 13所述的 3G手机， 其特征在于， 所述低频 走线的长度大于高频走线的长度。
16、 根据权利要求 13所述的 3G手机， 其特征在于， 所述延伸 槽沿第一开槽的方向设置。
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