WO2011106980A1 - 设有共用内置天线的移动终端及内置天线的共用方法 - Google Patents

设有共用内置天线的移动终端及内置天线的共用方法 Download PDF

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Publication number
WO2011106980A1
WO2011106980A1 PCT/CN2010/078712 CN2010078712W WO2011106980A1 WO 2011106980 A1 WO2011106980 A1 WO 2011106980A1 CN 2010078712 W CN2010078712 W CN 2010078712W WO 2011106980 A1 WO2011106980 A1 WO 2011106980A1
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WO
WIPO (PCT)
Prior art keywords
antenna
gsm
built
mobile terminal
circuit
Prior art date
Application number
PCT/CN2010/078712
Other languages
English (en)
French (fr)
Inventor
葛广顶
Original Assignee
深圳市南斗星科技有限公司
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 深圳市南斗星科技有限公司 filed Critical 深圳市南斗星科技有限公司
Publication of WO2011106980A1 publication Critical patent/WO2011106980A1/zh

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Classifications

    • 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
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
    • 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
    • H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation

Definitions

  • the present invention relates to a mobile terminal provided with a built-in antenna, and in particular to a shared method of a mobile terminal and a built-in antenna provided with a shared internal antenna.
  • FM FM radio
  • FM radio has become the basic configuration function of mobile terminals, but the traditional external FM antenna has been very inconvenient for users. Therefore, many antenna manufacturers have recently introduced built-in FM antennas.
  • the built-in FM antenna is independently disposed inside the mobile terminal, which occupies a large space inside the mobile terminal, thereby affecting the external shape of the mobile terminal, and independently setting the built-in FM antenna also increases the cost of the mobile terminal.
  • the present invention provides a mobile terminal provided with a shared internal antenna.
  • the invention also provides a sharing method of a built-in antenna of a mobile terminal.
  • the technical solution adopted by the present invention to solve the prior art problem is: providing a mobile terminal provided with a shared internal antenna, the mobile terminal comprising a built-in GSM antenna and a built-in FM antenna, the built-in GSM antenna and the built-in FM
  • the antennas are the same antenna.
  • the mobile terminal includes a circuit board, and the circuit board is provided with a frequency selection circuit, an antenna foot contact piece, an antenna feed pin contact piece, an FM chip, a GSM signal separation circuit, and an FM signal.
  • a separation circuit the FM signal separation circuit is disposed between the antenna feed contact piece and the FM chip
  • the GSM signal separation circuit is disposed between the antenna feed contact piece and the GSM circuit
  • the antenna ground The frequency selection circuit is disposed between the foot contact piece and the ground of the circuit board.
  • the FM signal separation circuit is disposed at the antenna ground Between the foot contact sheet and the FM chip.
  • the mobile terminal includes a circuit board, and the circuit board is provided with an antenna feed pin contact piece, an FM chip, a GSM signal separation circuit, and an FM signal separation circuit, and the antenna feed pin contact piece
  • the FM signal separation circuit is placed between the FM chip and the GSM signal separation circuit between the antenna feed contact piece and the GSM power.
  • the shared internal antenna provided in the mobile terminal is any form of antenna such as a monopole antenna, a planar inverted F antenna or a loop antenna.
  • the GSM antenna is a communication antenna of all types of mobile terminals, such as a 2G antenna, a 2.5G antenna, a 2.75G antenna, a 3G antenna or a 4G antenna, wherein the 2G antenna includes GSM850 and GSM900.
  • the mobile terminal may further include an external FM antenna, and the external FM antenna and the built-in FM antenna may be switched by a radio frequency switching circuit device.
  • the switching circuit device disposed between the external FM antenna and the built-in FM antenna can also be omitted, and the built-in FM antenna path and the external FM antenna path are directly connected through the RF transmission line, and the FM antenna and the antenna are disposed. Can work at the same time.
  • the present invention also provides a method for sharing a built-in antenna of a mobile terminal, wherein the shared method of the built-in antenna of the mobile terminal is applied to a mobile terminal provided with a shared internal antenna, the mobile terminal including a built-in GSM antenna and a built-in FM antenna,
  • the built-in GSM antenna is the same antenna as the built-in FM antenna, and the sharing method is:
  • the ground of the built-in GSM antenna is connected to the ground of the circuit board provided in the mobile terminal through the antenna foot contact piece and the frequency selection circuit, and the feed pin of the built-in GSM antenna is separated from the GSM signal by the antenna feed pin contact piece.
  • the circuit is connected to the GSM circuit and is isolated from the FM chip.
  • the GSM antenna with the ground pin works normally in the GSM antenna state;
  • the ground of the GSM antenna is isolated from the ground of the circuit board provided in the mobile terminal, and the antenna feed pin communicates with the FM chip through the antenna feed pin contact piece and the FM signal separation circuit, and is isolated from the GSM circuit, the GSM antenna Works in the FM antenna state.
  • the sharing method of the built-in antenna of the mobile terminal is: For the GSM signal, the feed pin of the built-in GSM antenna communicates with the GSM circuit through the antenna feed pin contact piece and the GSM signal separation circuit, and the FM chip Isolated, the GSM antenna operates in the GSM antenna state; For the FM signal, the antenna feed pin communicates with the FM chip through the antenna feed pin contact piece and the FM signal separation circuit, and is isolated from the GSM circuit, and the GSM antenna operates in the FM antenna state.
  • the sharing method can be used on the built-in FM transmitting antenna of the mobile terminal, or on the built-in TV antenna such as analog TV, digital TV CMMB, TDMB, DVB/T.
  • the present invention is directed to the shortcoming of the large size and high cost of the FM built-in antenna that is independently set.
  • the other internal antennas on the mobile terminal such as the GSM antenna, are used as the built-in FM antenna, thereby realizing the multifunctional sharing of one antenna, and adopting the technical scheme of the present invention. While fully ensuring the stability of the antenna performance, the space of the mobile terminal can be not increased, and the cost of setting up an additional antenna is not required.
  • Figure 1 is a schematic view showing the structure of a circuit board in a mobile terminal in a sharing method of a mobile terminal and a built-in antenna provided with a shared internal antenna;
  • FIG. 1 Schematic diagram of the built-in GSM and built-in FM shared antenna circuit
  • FIG. 1 Schematic diagram of the switching circuit between the built-in FM antenna and the external FM antenna
  • FIG. 1 Schematic diagram of the switching structure between the built-in FM antenna and the external FM antenna
  • FIG. 1 Schematic diagram of the direct connection structure between the built-in FM antenna and the external FM antenna.
  • the built-in FM antenna in the prior art is independently disposed inside the mobile terminal, it occupies a large space inside the mobile terminal, thereby affecting the external shape of the mobile terminal, and independently setting the built-in FM antenna also greatly increases the production cost of the mobile terminal.
  • This technical problem provides a mobile terminal provided with a shared internal antenna, the mobile terminal including a built-in GSM antenna and a built-in FM antenna, and the built-in GSM antenna and the built-in FM antenna are the same antenna.
  • FIG. 1 a schematic diagram of a circuit board in a mobile terminal in a shared method of a mobile terminal and a built-in antenna provided with a shared internal antenna.
  • the mobile terminal includes a circuit board 1 , and the circuit board 1 is provided with a frequency selection circuit 2 , an antenna foot contact piece 3 , an antenna feed pin contact piece 4 , an FM chip 27 , and a GSM circuit 28 .
  • the FM signal separation circuit 5 is placed between the antenna feed contact piece 4 and the FM chip, and the antenna feed contact piece 4 and the GSM circuit 28 are placed
  • the GSM signal separation circuit 6 is disposed therebetween, and the frequency selection circuit 2 is disposed between the antenna foot contact piece 3 and the ground of the circuit board 1.
  • the FM signal separation circuit 5 is disposed at the antenna
  • the foot contact piece 3 is interposed between the FM chip.
  • the mobile terminal comprises a circuit board 1 on which an antenna feed pin contact piece 4, an FM chip 27, a GSM circuit 28, a GSM signal separation circuit 6 and an FM signal are disposed.
  • a separation circuit 5 the FM signal separation circuit 5 is placed between the antenna feed contact piece 4 and the FM chip, and the GSM signal separation circuit is disposed between the antenna feed contact piece 4 and the GSM circuit 28. 6.
  • the specific technical solution in FIG. 1 is as follows:
  • the circuit board 1 has an antenna foot contact piece 3, an antenna feed pin contact piece 4, a frequency selection circuit 2, an FM signal separation circuit 5, and a GSM signal separation circuit 6.
  • the frequency selection circuit 2 can smoothly pass the GSM signal and suppress the passage of the FM signal;
  • the antenna foot contact piece 3 is connected to the ground of the mobile terminal GSM antenna, and is not directly connected to the ground of the mobile terminal printed circuit board 1, but is selected by the selection.
  • the frequency circuit 2 is connected to the ground of the printed circuit board 1 of the mobile terminal; the antenna feed contact piece 4 is connected to the feed pin of the mobile terminal GSM antenna; one end of the FM signal separation circuit 5 is connected to the antenna feed pin contact piece 4, and the other end is connected
  • the FM chip 27 is connected, which can pass the FM signal and suppress the passage of the GSM signal, and at the same time, make the FM antenna matching circuit; one end of the GSM signal separation circuit 6 is connected with the antenna feed pin contact piece 4, and the other end is connected with the GSM circuit, and the GSM signal can be made. Passing smoothly and suppressing the passage of the FM signal, and simultaneously making the GSM antenna matching circuit.
  • a grounded GSM antenna such as a PIFA (Planar Inverted F Antenna) is mounted on the mobile terminal printed circuit board 1
  • the ground of the GSM antenna contacts the slice 3 through the antenna foot and selects
  • the frequency circuit 2 is connected to the ground of the printed circuit board 1 of the mobile terminal
  • the feed pin of the GSM antenna is connected to the GSM circuit through the antenna feed pin contact piece 4 and the GSM signal separation circuit 6 and is isolated from the FM chip, and the GSM antenna with the ground strap Normal operation in the GSM antenna state
  • the ground of the GSM antenna cannot communicate with the ground of the printed circuit board 1 of the mobile terminal through the frequency selective circuit 2, and the ground of the printed circuit board 1 with the mobile terminal
  • the antenna feed pin communicates with the FM chip through the antenna feed pin contact piece 4 and the FM signal separation circuit 5, and is isolated from the GSM circuit, and the GSM antenna operates in the FM monopole antenna state.
  • the GSM antenna operates in the FM monopole antenna state.
  • the antenna foot contact piece 3 and the frequency selection circuit 2 can be removed on the mobile terminal printed circuit board 1, and the antenna signal contact piece 4 and the FM signal separation circuit are passed through the antenna feed pin. 5 and the GSM signal separation circuit 6 directly realizes the sharing of the FM and GSM antennas.
  • the shared internal antenna provided in the mobile terminal may be a monopole antenna, All forms of antennas such as PIFA (planar to inverted F antenna), loop antenna, etc., the process can be iron sheet, FPC (flexible printed circuit), ceramic, PCB (printed circuit board) antenna, LDS (laser direct forming), etc. .
  • the GSM antenna is a communication antenna of all types of mobile terminals such as a 2G antenna, a 2.5G antenna, a 2.75G antenna, a 3G antenna or a 4G antenna, wherein the 2G antenna includes GSM850, GSM900, DCS 1800, PCS 1900 or CDMA.
  • FIG. 2 Please refer to Figure 2 for the built-in GSM and built-in FM shared antenna circuit schematic.
  • the antenna feed end of the built-in GSM antenna 9 is connected to passive components (resistors, inductors or capacitors) 7, 8, 12, 13, 14, 15, 16, 17, and 18, with built-in GSM antenna 9.
  • the antenna feet are connected to passive components (resistors, inductors or capacitors) 10 and 11.
  • the passive components 7, 8, 16, 17 and 18 form a GSM signal separation circuit
  • the passive components 12, 13, 14 and 15 constitute an FM signal separation circuit
  • the passive components 10 and 11 constitute a frequency selection circuit.
  • Passive devices can be configured with 0402-size chip devices, such as passive devices 7, 8 and 10 with 22pF capacitors, passive devices 11, 12 and 16 with 120nH inductors, passive devices 13 and 17 with 47nH inductors, passive
  • the device 14 is a 56pF capacitor
  • the passive device 15 is an 82nH inductor
  • the passive device 18 is removed.
  • Such a configuration circuit can use a mobile terminal antenna such as GSM850, GSM900, DCS 1800, PCS 1900, CDMA, and 3G as an FM internal antenna, wherein Passive components 7, 17, 18, 12, 15, etc.
  • the forms of the GSM signal separation circuit, the FM signal separation circuit, and the frequency selection circuit can be diversified, and can be selected and adjusted according to actual needs, and the signal separation circuit can also use a duplexer or the like.
  • FIG. 4 for a schematic diagram of the switching structure of the built-in FM antenna and the external FM antenna, including the FM signal separation circuit 5, the RF switching circuit device 29, the FM chip 27, the headphone interface 30, and the earphone 31.
  • the common end of the RF switching circuit device 29 is connected to the FM chip 27, one end is connected to the FM signal separating circuit 5, and the other end is connected to the earphone interface 30; the earphone 31 can be inserted into the earphone interface 30 and connected.
  • the earphone 31 serves as an FM external antenna.
  • the common end of the RF switching circuit device 29 When the earphone is inserted, the common end of the RF switching circuit device 29 is turned on with the end of the RF switching circuit device 29 connected to the earphone interface 30, and the end of the RF switching circuit device 29 connected to the FM signal separating circuit 5 is not turned on, FM Works in external antenna mode.
  • the common end of the RF switching circuit device 29 is not electrically connected to the end of the RF switching circuit device 29 connected to the earphone interface 30, and is electrically connected to the end of the RF switching circuit device 29 connected to the FM signal separating circuit 5,
  • the FM works in the built-in antenna mode. That is, FM is realized by the RF switching circuit device. Internal and external antenna switching.
  • the circuit is connected to the earphone interface end 20 of the mobile terminal and the FM chip end 19.
  • the DC voltage input terminal 22 does not apply a DC voltage
  • the FM chip end communicates with the earphone interface end
  • the mobile terminal external earphone is an FM external antenna; when no external earphone is inserted into the earphone interface
  • the DC voltage input terminal 22 adds a DC voltage to turn on the RF switching diode 21, and the FM chip end communicates with the built-in FM antenna through the RF switching diode 21 and the DC blocking capacitor 24.
  • the resistor 23 is generally several thousand ohms
  • the DC voltage input terminal 22 is applied with a DC voltage of several volts
  • the DC blocking capacitor 24 is at about InF.
  • the frequency selective circuit composed of the capacitor 25 and the inductor 26 allows the direct current to pass and suppress the FM.
  • the signal passes.
  • the switching circuit can have different forms or a switching module.
  • the RF switching circuit device 29 can be removed, and the internal and external antennas are directly connected through the RF transmission line.
  • the FM internal antenna and the FM external antenna can work simultaneously, and the FM antenna performance does not drop too much.
  • FIG. 5 for the direct connection structure between the built-in FM antenna and the external FM antenna, including the FM signal separation circuit 5, the RF transmission line 32, the FM chip 27, the headphone jack 30 and the earphone 31, wherein the earphone 31 is used as an FM external antenna.
  • the RF transmission line 32 connects the FM signal separation circuit 5, the headphone interface 30 and the FM chip 27, that is, the FM internal and external antennas can be operated without using the RF switching circuit device 29.
  • the present invention also provides a method for sharing a built-in antenna of a mobile terminal, wherein the shared method of the built-in antenna of the mobile terminal is applied to a mobile terminal provided with a shared internal antenna, the mobile terminal including a built-in GSM antenna and a built-in FM antenna,
  • the built-in GSM antenna is the same antenna as the built-in FM antenna, and the sharing method is:
  • the ground of the built-in GSM antenna is connected to the ground of the circuit board provided in the mobile terminal through the antenna foot contact piece and the frequency selection circuit, and the feed pin of the built-in GSM antenna is separated from the GSM signal by the antenna feed pin contact piece.
  • the circuit is connected to the GSM circuit and is isolated from the FM chip.
  • the GSM antenna with the ground pin works normally in the GSM antenna state;
  • the ground of the GSM antenna is isolated from the ground of the circuit board provided in the mobile terminal, and the antenna feed pin communicates with the FM chip through the antenna feed pin contact piece and the FM signal separation circuit, and is isolated from the GSM circuit, the GSM antenna Works in the FM antenna state.
  • the invention aims at the large size and high cost of the FM built-in antenna which is currently independently set, and uses the mobile Other built-in antennas on the terminal, such as GSM antennas, are used as built-in FM antennas to realize multi-functional sharing of one antenna.
  • the antenna performance can be fully ensured without increasing the internal space of the mobile terminal, and no additional Set the cost of an antenna.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Support Of Aerials (AREA)
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Description

设有共用内置天线的移动终端及内置天线的共用方法
【技术领域】
本发明涉及设有内置天线的移动终端，具体涉及一种设有共用内置天线的 移动终端及内置天线的共用方法。
【背景技术】
FM (调频收音机 )成为移动终端的基本配置功能， 但传统的外置 FM天线 已经非常不方便用户使用，所以，近期不少天线厂家相继推出了内置 FM天线。
但是， 内置 FM天线独立设置在移动终端内部， 会占用移动终端内部较大 的空间 , 从而影响了移动终端的外部造型， 而且独立设置内置 FM天线也会增 加移动终端的成本。
在移动终端例如手机普及的今天， 其功能、 外部造型、 生产成本成为移动 电话市场竟争的主要焦点， FM内置天线要得到更好的应用和推广， 其成本、 尺寸需要进一步的减少。
【发明内容】
为了解决现有技术中内置 FM天线独立设置在移动终端内部， 会占用移动 终端内部较大的空间， 从而影响了移动终端的外部造型， 而且独立设置内置 FM天线也会增加移动终端的生产成本这一技术问题本发明提供了一种设有共 用内置天线的移动终端。
本发明还提供了一种移动终端内置天线的共用方法。
本发明解决现有技术问题所采用的技术方案为： 提供了一种设有共用内置 天线的移动终端， 所述移动终端包括内置 GSM天线和内置 FM天线， 所述内 置 GSM天线与所述内置 FM天线为同一天线。
根据本发明的一优选技术方案： 所述移动终端包括电路板， 所述电路板上 设置有选频电路、 天线地脚接触片、 天线馈脚接触片、 FM芯片、 GSM信号分 离电路和 FM信号分离电路， 所述天线馈脚接触片与所述 FM芯片之间放置所 述 FM信号分离电路，在所述天线馈脚接触片与 GSM电路之间设置所述 GSM 信号分离电路， 所述天线地脚接触片与所述电路板的地之间设置所述选频电 路。
根据本发明的一优选技术方案：所述 FM信号分离电路设置在所述天线地 脚接触片与所述 FM芯片之间。
根据本发明的一优选技术方案： 所述移动终端包括电路板，所述电路板上 设置有天线馈脚接触片、 FM芯片、 GSM信号分离电路和 FM信号分离电路， 所述天线馈脚接触片与所述 FM芯片之间放置所述 FM信号分离电路， 在所述 天线馈脚接触片与 GSM电 间设置所述 GSM信号分离电路。
根据本发明的一优选技术方案： 所述移动终端内设置的共用内置天线为单 极子天线、 平面倒 F天线或环形天线等一切形式的天线。
根据本发明的一优选技术方案：所述 GSM天线为 2G天线、 2.5G天线、 2.75G 天线、 3G天线或 4G天线等一切类型的移动终端通讯天线， 其中， 所述 2G天 线包括 GSM850、 GSM900、 DCS 1800, PCS 1900或 CDMA等。
根据本发明的一优选技术方案： 所述移动终端还可包括外置 FM天线， 所 述外置 FM天线与所述内置 FM天线可通过一射频切换电路装置切换。 在所述 外置 FM天线与所述内置 FM天线之间设置的切换电路装置也可以省去， 内置 FM天线通路与外置 FM天线通路通过射频传输线直接连在一起， FM内、 夕卜 置天线可以同时工作。
本发明还提供了一种移动终端内置天线的共用方法，所述移动终端内置天 线的共用方法运用在设有共用内置天线的移动终端， 所述移动终端包括内置 GSM天线和内置 FM天线，所述内置 GSM天线与所述内置 FM天线为同一天 线， 其共用方法为：
对于 GSM信号， 内置 GSM天线的地脚通过天线地脚接触片和选频电路 与移动终端内设置的电路板的地相通， 所述内置 GSM天线的馈脚通过天线馈 脚接触片和 GSM信号分离电路与 GSM电路相通， 并与 FM芯片隔离， 带地 脚的 GSM天线正常工作在 GSM天线状态；
对于 FM信号， GSM天线的地脚与移动终端内设置的电路板的地处于隔 离状态， 天线馈脚通过天线馈脚接触片和 FM信号分离电路与 FM芯片相通， 并与 GSM电路隔离， GSM天线工作在 FM天线状态。
根据本发明的一优选技术方案： 所述移动终端内置天线的共用方法为： 对于 GSM信号， 内置 GSM天线的馈脚通过天线馈脚接触片和 GSM信号 分离电路与 GSM电路相通， 并与 FM芯片隔离， GSM天线工作在 GSM天线 状态； 对于 FM信号， 天线馈脚通过天线馈脚接触片和 FM信号分离电路与 FM 芯片相通， 并与 GSM电路隔离， GSM天线工作在 FM天线状态。
该共用方法可以用在移动终端内置 FM发射天线上，也可以用在模拟电视， 数字电视 CMMB、 TDMB、 DVB/T等内置电视天线上。
本发明针对当前独立设置的 FM内置天线尺寸大、 成本高的不足， 用移动 终端上的其它内置天线如 GSM天线作内置 FM天线， 实现了一根天线的多功 能共用，采用本发明技术方案后在充分保证天线性能稳定的同时可以不增加移 动终端的空间， 也不用增加另设一根天线的成本。
【附图说明】
图 1.本发明设有共用内置天线的移动终端及内置天线的共用方法中移动 终端内电路板结构示意图；
图 2.内置 GSM和内置 FM共用天线电路原理图；
图 3.内置 FM天线与外置 FM天线切换电路原理图；
图 4.内置 FM天线与外置 FM天线切换结构示意图；
图 5.内置 FM天线与外置 FM天线直接连通结构示意图。
【具体实施方式】
为了解决现有技术中内置 FM天线独立设置在移动终端内部， 会占用移动 终端内部较大的空间， 从而影响了移动终端的外部造型， 而且独立设置内置 FM天线也会大大增加移动终端的生产成本这一技术问题本发明提供了一种设 有共用内置天线的移动终端， 所述移动终端包括内置 GSM天线和内置 FM天 线， 所述内置 GSM天线与所述内置 FM天线为同一天线。
以下结合附图对本发明技术方案进行详细说明：
请参阅图 1本发明设有共用内置天线的移动终端及内置天线的共用方法中 移动终端内电路板结构示意图。 如图 1所示， 所述移动终端包括电路板 1 , 所 述电路板 1上设置有选频电路 2、 天线地脚接触片 3、 天线馈脚接触片 4、 FM 芯片 27、 GSM电路 28、 GSM信号分离电路 6和 FM信号分离电路 5, 所述天 线馈脚接触片 4与所述 FM芯片之间放置所述 FM信号分离电路 5 , 在所述天 线馈脚接触片 4与 GSM电路 28之间设置所述 GSM信号分离电路 6， 所述天 线地脚接触片 3与所述电路板 1的地之间设置所述选频电路 2。
在本发明的另一优选技术方案中所述 FM信号分离电路 5设置在所述天线 地脚接触片 3与所述 FM芯片之间。
在本发明的另一优选技术方案中所述移动终端包括电路板 1 ,所述电路板 1上设置有天线馈脚接触片 4、 FM芯片 27、 GSM电路 28、 GSM信号分离电 路 6和 FM信号分离电路 5 , 所述天线馈脚接触片 4与所述 FM芯片之间放置 所述 FM信号分离电路 5 , 在所述天线馈脚接触片 4与 GSM电路 28之间设置 所述 GSM信号分离电路 6。
在图 1中具体的技术方案为： 电路板 1上有天线地脚接触片 3、天线馈脚 接触片 4、 选频电路 2、 FM信号分离电路 5和 GSM信号分离电路 6。 选频电 路 2可以让 GSM信号顺利通过并抑止 FM信号通过； 天线地脚接触片 3与移 动终端 GSM天线的地脚连接， 不与移动终端印制电路板 1的地直接相连， 而 是通过选频电路 2与移动终端印制电路板 1的地连接； 天线馈脚接触片 4与移 动终端 GSM天线的馈脚连接； FM信号分离电路 5的一端与天线馈脚接触片 4 连接，另一端与 FM芯片 27连接，可以让 FM信号通过并抑止 GSM信号通过， 同时作 FM天线匹配电路； GSM信号分离电路 6的一端与天线馈脚接触片 4 连接， 另一端与 GSM电路连接， 可以让 GSM信号顺利通过并抑止 FM信号 通过， 同时作 GSM天线匹配电路。
当带地脚的 GSM天线如 PIFA (平面倒 F天线）安装到移动终端印制电路 板 1上时， 一方面， 对 GSM信号来说， GSM天线的地脚通过天线地脚接触片 3和选频电路 2与移动终端印制电路板 1的地相通， GSM天线的馈脚通过天线 馈脚接触片 4和 GSM信号分离电路 6与 GSM电路相通， 并与 FM芯片隔离， 带地脚的 GSM天线正常工作在 GSM天线状态； 另一方面， 对 FM信号来说， GSM天线的地脚不能通过选频电路 2与移动终端印制电路板 1的地相通， 与 移动终端印制电路板 1的地处于隔离状态， 天线馈脚通过天线馈脚接触片 4和 FM信号分离电路 5与 FM芯片相通， 并与 GSM电路隔离， GSM天线工作在 FM单极子天线状态。 这样， GSM天线除 GSM天线用途外也可以当 FM天线 用。
对于不带地脚的 GSM天线如单极子天线等， 在移动终端印制电路板 1上 可以去除天线地脚接触片 3和选频电路 2,通过天线馈脚接触片 4、 FM信号分 离电路 5和 GSM信号分离电路 6直接实现 FM、 GSM天线共用。
在上述说明中所述移动终端内设置的共用内置天线可以是单极子天线、 PIFA (平面到倒 F天线）、 环形天线等一切形式的天线， 其工艺可以是铁片、 FPC (柔性印制电路）、 陶瓷、 PCB (印制电路板 )天线、 LDS (激光直接成型） 等。
所述 GSM天线为 2G天线、 2.5G天线、 2.75G天线、 3G天线或 4G天线 等一切类型的移动终端通讯天线，其中，所述 2G天线包括 GSM850、 GSM900, DCS 1800、 PCS 1900或 CDMA等。
请参阅图 2内置 GSM和内置 FM共用天线电路原理图。 如图 2所示， 内 置 GSM天线 9的天线馈脚端与无源器件 （电阻、 电感或者电容） 7、 8、 12、 13、 14、 15、 16、 17和 18相连， 内置 GSM天线 9的天线地脚端与无源器件 (电阻、 电感或者电容） 10和 11相连。
其中无源器件 7、 8、 16、 17和 18组成 GSM信号分离电路， 无源器件 12, 13、 14和 15组成 FM信号分离电路， 无源器件 10和 11组成选频电路。 无源 器件可以配置 0402尺寸的贴片式器件， 如无源器件 7、 8和 10为 22pF电容， 无源器件 11、 12和 16为 120nH电感， 无源器件 13和 17为 47nH电感， 无源 器件 14为 56pF电容， 无源器件 15为 82nH电感， 无源器件 18去除， 这样的 配置电路可以使 GSM850、 GSM900、 DCS 1800, PCS 1900, CDMA和 3G等 移动终端天线用作 FM内置天线， 其中用于天线匹配的无源器件 7、 17、 18、 12、 15等可以根据实际天线调整。 GSM信号分离电路、 FM信号分离电路和 选频电路的形式可以多样化， 根据实际需要可以选择和调整， 信号分离电路也 可以用双工器等。
请参阅图 4内置 FM天线与外置 FM天线切换结构示意图， 包括 FM信号 分离电路 5、 射频切换电路装置 29、 FM芯片 27、 耳机接口 30和耳机 31。射 频切换电路装置 29的公共端与 FM芯片 27相连， 一端与 FM信号分离电路 5 相连， 另一端与耳机接口 30相连； 耳机 31可以插入耳机接口 30并相连。 耳 机 31作 FM外置天线。 插入耳机时，射频切换电路装置 29的公共端跟射频切 换电路装置 29的与耳机接口 30相连的一端导通， 跟射频切换电路装置 29的 与 FM信号分离电路 5相连的一端不导通， FM工作在外置天线模式。 没有插 入耳机时，射频切换电路装置 29的公共端跟射频切换电路装置 29的与耳机接 口 30相连的一端不导通， 跟射频切换电路装置 29的与 FM信号分离电路 5 相连的一端导通， FM工作在内置天线模式。即通过射频切换电路装置实现 FM 内、 外置天线切换。
请参阅图 3内置 FM天线与外置 FM天线切换电路原理图。 如图 3所示， 电路与移动终端耳机接口端 20、 FM芯片端 19相连。 当移动终端外置耳机插 入耳机接口时， 直流电压输入端 22不加直流电压， FM芯片端与耳机接口端相 通， 移动终端外置耳机当 FM外置天线； 当没有外置耳机插入耳机接口时， 直 流电压输入端 22加一直流电压使射频开关二极管 21导通， FM芯片端通过射 频开关二极管 21和隔直电容 24与内置 FM天线相通。 这样 FM内、 外置天线 可以根据需要切换。 其中电阻 23—般为几千欧姆左右， 直流电压输入端 22加 的直流电压在几伏特左右， 隔直电容 24在 InF左右， 电容 25和电感 26组成 的选频电路可以让直流电通过并抑止 FM信号通过。切换电路可以有不同形式， 也可以是切换开关模块。
在许多情况下射频切换电路装置 29可以去掉， 内、 外置天线通过射频传 输线直接连接在一起， FM内置天线与 FM外置天线可以同时工作， FM天线 性能不会下降太多。 请参阅图 5内置 FM天线与外置 FM天线直接连接结构示 意图， 包括 FM信号分离电路 5、 射频传输线 32、 FM芯片 27、 耳机接口 30 和耳机 31， 其中耳机 31作 FM外置天线。射频传输线 32把 FM信号分离电路 5、 耳机接口 30和 FM芯片 27连接在一起， 即不用射频切换电路装置 29也可 实现 FM内、 外置天线均可工作。
本发明还提供了一种移动终端内置天线的共用方法，所述移动终端内置天 线的共用方法运用在设有共用内置天线的移动终端， 所述移动终端包括内置 GSM天线和内置 FM天线，所述内置 GSM天线与所述内置 FM天线为同一天 线， 其共用方法为：
对于 GSM信号， 内置 GSM天线的地脚通过天线地脚接触片和选频电路 与移动终端内设置的电路板的地相通， 所述内置 GSM天线的馈脚通过天线馈 脚接触片和 GSM信号分离电路与 GSM电路相通， 并与 FM芯片隔离， 带地 脚的 GSM天线正常工作在 GSM天线状态；
对于 FM信号， GSM天线的地脚与移动终端内设置的电路板的地处于隔 离状态， 天线馈脚通过天线馈脚接触片和 FM信号分离电路与 FM芯片相通， 并与 GSM电路隔离， GSM天线工作在 FM天线状态。
本发明针对当前独立设置的 FM内置天线尺寸大、 成本高的不足， 用移动 终端上的其它内置天线如 GSM天线作内置 FM天线， 实现了一根天线的多功 能共用，采用本发明技术方案后在充分保证天线性能稳定的同时可以不增加移 动终端内部空间， 也不用增加另设一根天线的成本。
以上内容是结合具体的优选技术方案对本发明所作的进一步详细说明， 不 能认定本发明的具体实施只局限于这些说明。对于本发明所属技术领域的普通 技术人员来说， 在不脱离本发明构思的前提下， 还可以做出若干筒单推演或替 换， 都应当视为属于本发明的保护范围。

Claims

权 利 要 求 书
1.一种设有共用内置天线的移动终端，其特征在于： 所述移动终端包括内 置 GSM天线和内置 FM天线，所述内置 FM天线与所述内置 GSM天线为同一 天线。
2.根据权利要求 1所述设有共用内置天线的移动终端， 其特征在于： 所述 移动终端包括电路板 (1), 所述电路板 (1)上设置有选频电路 (2)、 天线地脚接触 片（3)、 天线馈脚接触片（4)、 FM芯片（27)、 GSM信号分离电路 (6)和 FM信号分 离电路 (5)， 所述天线馈脚接触片（4)与所述 FM芯片（27)之间设置所述 FM信号 分离电路 (5), 在所述天线馈脚接触片（4)与 GSM电路 (28)之间设置所述 GSM 信号分离电路 (6), 所述天线地脚接触片（3)与所述电路板 (1)的地之间设置所述 选频电路 (¾。
3.根据权利要求 2所述设有共用内置天线的移动终端， 其特征在于： 所述 FM信号分离电路 (5)设置在所述天线地脚接触片（3)与所述 FM芯片（27)之间。
4.根据权利要求 1所述设有共用内置天线的移动终端， 其特征在于： 所述 移动终端包括电路板 (1),所述电路板 (1)上设置有天线馈脚接触片（4)、 FM芯片 (27)、 GSM信号分离电路 (6)和 FM信号分离电路 (5), 所述天线馈脚接触片（4) 与所述 FM芯片（27)之间放置所述 FM信号分离电路 (5), 在所述天线馈脚接触 片（4)与 GSM电路 (28)之间设置所述 GSM信号分离电路 (6)。
5.根据权利要求 1所述设有共用内置天线的移动终端， 其特征在于： 所述 移动终端内设置的共用内置天线为不带接地脚的天线或带接地脚的天线。
6.根据权利要求 1所述设有共用内置天线的移动终端， 其特征在于： 所述 GSM天线为移动终端内置通讯天线， 包括 2G天线、 2.5G天线、 2.75G天线、 3G天线或 4G天线， 其中， 所述 2G天线包括 GSM850、 GSM900、 DCS 1800, PCS 1900或 CDMA天线。
7.根据权利要求 1所述设有共用内置天线的移动终端， 其特征在于： 所述 移动终端接外置 FM天线， 所述外置 FM天线与所述内置 FM天线通过一射频 切换电路装置切换， 或者内置 FM天线通路与外置 FM天线通路通过射频传输 线直接连在一起。
8.一种移动终端内置天线的共用方法，其特征在于： 所述移动终端内置天 线的共用方法运用了如权 1所述设有共用内置天线的移动终端，所述移动终端 包括内置 GSM天线和内置 FM天线，所述内置 GSM天线与所述内置 FM天线 为同一天线， 其共用方法为：
对于 GSM信号， 内置 GSM天线的地脚通过天线地脚接触片（3)和选频电 路 (2)与移动终端内设置的电路板 (1)的地相通，所述内置 GSM天线的馈脚通过 天线馈脚接触片（4)和 GSM信号分离电路 (6)与 GSM电路 (28)相通，并与 FM芯 片（27)隔离， 带地脚的 GSM天线正常工作在 GSM天线状态；
对于 FM信号， GSM天线的地脚与移动终端内设置的电路板 (1)的地处于 隔离状态，天线馈脚通过天线馈脚接触片（4)和 FM信号分离电路 (5)与 FM芯片 (27)相通， 并与 GSM电路 (28)隔离， GSM天线工作在 FM天线状态。
9.根据权利要求 8所述移动终端内置天线的共用方法， 其特征在于： 所述 移动终端内置天线的共用方法为：
对于 GSM信号，内置 GSM天线的馈脚通过天线馈脚接触片（4)和 GSM信 号分离电路 (6)与 GSM电路 (28)相通，并与 FM芯片（27)隔离，天线工作在 GSM 天线状态；
对于 FM信号， 天线馈脚通过天线馈脚接触片 (4)和 FM信号分离电路 (5) 与 FM芯片（27)相通， 并与 GSM电路 (28)隔离， GSM天线工作在 FM天线状 态。
10.根据权利要求 8或 9所述移动终端内置天线的共用方法，可以用在移动 终端内置 FM发射天线上， 也可以用在模拟电视、 数字电视 CMMB、 TDMB、 DVB/T等内置电视天线上。
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CN101807935A (zh) 2010-08-18

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