WO2012142942A1 - Nfc功能与fm-tx发送功能共用天线的移动终端 - Google Patents

Nfc功能与fm-tx发送功能共用天线的移动终端 Download PDF

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Publication number
WO2012142942A1
WO2012142942A1 PCT/CN2012/074228 CN2012074228W WO2012142942A1 WO 2012142942 A1 WO2012142942 A1 WO 2012142942A1 CN 2012074228 W CN2012074228 W CN 2012074228W WO 2012142942 A1 WO2012142942 A1 WO 2012142942A1
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Prior art keywords
chip
antenna
mobile terminal
nfc
function
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PCT/CN2012/074228
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English (en)
French (fr)
Inventor
顾建良
林子华
张磊
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惠州Tcl移动通信有限公司
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Application filed by 惠州Tcl移动通信有限公司 filed Critical 惠州Tcl移动通信有限公司
Priority to ES12774389T priority Critical patent/ES2718123T3/es
Priority to EP12774389.6A priority patent/EP2701455B1/en
Priority to US13/979,301 priority patent/US8989809B2/en
Publication of WO2012142942A1 publication Critical patent/WO2012142942A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details 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
    • H04B1/005—Details 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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
    • H04B1/0053—Details 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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
    • 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
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details 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
    • H04B1/005—Details 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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
    • H04B1/0053—Details 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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
    • H04B1/006—Details 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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band using switches for selecting the desired band
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details 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
    • H04B1/38—Transceivers, 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
    • H04B1/40—Circuits
    • H04B1/403—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency
    • H04B1/406—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency with more than one transmission mode, e.g. analog and digital modes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Definitions

  • the present invention relates to a mobile terminal having an antenna transmitting function, and more particularly to a mobile terminal in which an NFC function and an FM-TX transmitting function share an antenna.
  • NFC Near Field
  • FM-TX Frequency Modulation-Transmitter, FM-transmitter transmission function
  • WIFI wireless
  • the more antennas need more space, and the antennas need to consider isolation and other issues, making the design of the terminal more and more difficult.
  • the more antennas the greater the cost, and it does not meet the requirements of diversified functions, miniaturization and low price of electronic products.
  • an object of the present invention is to provide a mobile terminal that shares an antenna with an NFC function and an FM-TX transmission function, and saves the space of the mobile terminal by reducing the antenna of the mobile terminal.
  • a mobile terminal that shares an antenna with an NFC function and an FM-TX transmission function, in which a baseband chip, an NFC chip, an FM chip, and an antenna are disposed, and the NFC chip and the FM chip are respectively connected to a baseband chip, where A gate unit is further disposed in the mobile terminal; the gate unit is respectively connected to a baseband chip, an NFC chip, an FM chip, and an antenna, and is configured to turn on a path or a guide between the NFC chip and the antenna according to the control of the baseband chip. Pass the path between the FM chip and the antenna.
  • the NFC function and the FM-TX transmitting function share a mobile terminal of the antenna, wherein the baseband chip is used to control an operating state of the FM chip and a conducting state of the gating unit; and the baseband chip controls the FM chip to start working.
  • the gate unit is controlled to turn on the path between the FM chip and the antenna 101; when the baseband chip controls the FM chip to stop working, the gate unit is simultaneously controlled to turn on the path between the NFC chip and the antenna 101.
  • the NFC function and the FM-TX transmitting function share a mobile terminal of the antenna, wherein the antenna is a dual-band antenna.
  • the NFC function and the FM-TX transmitting function share a mobile terminal of the antenna, wherein the gating unit is an analog single-pole double-throw switch, and the double-throwing head of the analog single-pole double-throw switch is respectively connected to the NFC chip and the FM chip. .
  • the NFC function and the FM-TX transmitting function share a mobile terminal of the antenna, wherein the mobile terminal is a mobile phone or a mobile TV.
  • the mobile terminal that shares the antenna with the NFC function and the FM-TX transmission function provided by the present invention shares the same antenna with the antenna for realizing the NFC function of the mobile terminal and the antenna for implementing the FM-TX transmission function, and selects the corresponding function by the gating unit.
  • the path saves an antenna for the mobile terminal, saves space for the mobile terminal, and reduces the cost of the mobile terminal.
  • FIG. 1 is a structural block diagram of a mobile terminal in which an NFC function and an FM-TX transmission function share an antenna according to the present invention.
  • FIG. 2 is a schematic block diagram of a mobile terminal in which an NFC function and an FM-TX transmission function share an antenna according to the present invention.
  • the present invention provides a mobile terminal that shares an antenna with an NFC function and an FM-TX transmission function.
  • the frequency of the NFC RF signal is 13.5 MHz, and the frequency of the RF signal of the FM is 76 MHz to 108 MHz.
  • both of them belong to the low frequency signal range, and their resonance points are all in the low frequency range. Therefore, the NFC antenna and the FM antenna of the mobile terminal can be shared, and the present invention provides an NFC function and FM according to this principle.
  • the TX transmission function shares the mobile terminal of one antenna.
  • a mobile terminal that shares an antenna with an NFC function and an FM-TX transmission function includes a baseband chip, an NFC chip, an FM chip, an antenna 101, and a gating unit.
  • the NFC chip is connected to the baseband chip through the I2C bus for realizing the short-distance transmission function;
  • the FM chip is a chip with a TX transmission function, which is connected to the baseband chip through the I2C bus, and is used for implementing a digital broadcast signal function.
  • the gate unit is respectively connected to the baseband chip, the NFC chip, the FM chip, and the antenna 101, and is configured to selectively connect the path between the NFC chip and the antenna 101 or turn on between the FM chip and the antenna 101 according to the control of the baseband chip. path.
  • the baseband chip is a main control device of the mobile terminal, and is used to implement basic operations of the mobile terminal, wherein the baseband chip is used to control an operating state of the FM chip and a conduction state of the gating unit; and the baseband chip is controlled.
  • the gate unit is controlled to turn on the path between the FM chip and the antenna 101.
  • the gate unit is controlled to conduct the path between the NFC chip and the antenna 101. .
  • the NFC function is usually used for a contactless IC card or a contactless IC card reader, and the FM-TX is used for digital broadcast signal transmission. Therefore, the NFC function and the FM-TX transmission function are not used at the same time.
  • the data transmitted by the FM-TX is generated by the baseband chip of the mobile terminal, transmitted to the FM chip through the I2C bus, and then modulated by the FM chip into a digital broadcast signal for transmission.
  • the baseband chip acts as the master device of the mobile terminal and can control the entire flow of data transmission. It knows when it needs to send data, when the data transmission ends, and after the data is sent, the baseband chip will automatically control the FM. The chip stops working, thereby reducing the power consumption of the mobile terminal.
  • the NFC function when used as a non-contact IC card, is a passive device.
  • the flow is controlled by an external card reader, that is, the external card reader is the master device. Therefore, the NFC chip needs to be always available. Wait for the operation of the external card reader. Even if the NFC function is used as a card reader, it is necessary to wait for the external non-contact IC card to be close to continue processing.
  • the mobile terminal that shares the antenna with the NFC function and the FM-TX transmission function provided by the embodiment of the present invention is configured to set the NFC radio frequency signal to be turned on by default, that is, the path between the NFC chip and the antenna is turned on by default.
  • the baseband chip controls the gating unit to switch on the path between the FM chip and the antenna 101 before transmitting the data, and the FM chip can transmit data through the antenna 101. Since the baseband chip is the master device of the mobile terminal, it can detect when the data is transmitted. After the transmission ends, the baseband chip control gating unit switches to the default state, that is, the state in which the NFC chip and the antenna are turned on is turned on.
  • the NFC function provided by the present invention and the mobile terminal sharing the antenna with the FM-TX transmission function have the function of connecting the antenna to the NFC chip as a default function, no software modification is required, so the use of the NFC function does not require additional operations, and the ordinary The mobile terminal operates exactly the same.
  • the gating unit is an analog single-pole double-throw switch 102.
  • the two fixed contacts of the analog single-pole double-throw switch 102 are respectively connected to the NFC chip and the FM chip, and the switching state is directly controlled by the baseband chip. No human intervention required.
  • the antenna is a dual-frequency antenna, and the dual-frequency antenna has two resonance points, as long as the NFC radio frequency signal transmission and the TX digital broadcast signal transmission can be realized.
  • the mobile terminal is a mobile phone or a mobile TV.
  • the mobile terminal is used as a mobile phone, and the FM-TX transmission function and the control mode of the shared antenna of the NFC function are described in detail: the baseband chip controls the NFC chip and the antenna.
  • the path is normally open.
  • the FM chip starts to work, and the baseband chip prepares the data to be transmitted; after that, the baseband chip controls the gating unit to switch, and turns on the dual-frequency antenna and the FM chip.
  • the path between the two transmits the FM-TX data; after the data transmission ends, the baseband chip controls the gating unit to switch the conduction state, and turns on the path between the NFC chip and the antenna.
  • the NFC function provided by the present invention and the FM-TX transmitting function share the antenna of the mobile terminal, based on the characteristics of the NFC antenna and the FM-TX antenna in the low frequency range, and the use characteristics of the NFC and FM-TX functions,
  • the antenna that implements the NFC function of the mobile terminal and the antenna that implements the FM-TX transmission function share the same antenna, and the channel of the corresponding function is turned on by the gating unit, thereby saving an antenna for the mobile terminal, thereby effectively reducing the space requirement for the mobile terminal.
  • the difficulty and cycle of the development of the mobile terminal are greatly reduced, the circuit layout and the structural design of the mobile terminal are improved, and the cost of the antenna manufacturing mold is saved because the number of antennas is less.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Telephone Function (AREA)
  • Transceivers (AREA)

Description

NFC功能与FM-TX发送功能共用天线的移动终端
技术领域
本发明涉及一种具有天线发射功能的移动终端，特别涉及一种NFC功能与FM-TX发送功能共用天线的移动终端。
背景技术
目前，智能移动终端一般都设计有NFC（Near Field Communication，近距离无线通讯技术）近距离传输系统和FM-TX（Frequency Modulation-Transmitter，调频-发射机）发送功能，这两个功能都需要设计相应的天线。
而在智能移动终端中，往往还设置有WIFI（wireless fidelity，无线局域网）天线、蓝牙天线、再加上无线通信本身的天线，这样一台移动终端至少需要五个天线。对于体积要求越来越小，功能要求越来越强大的终端设备来说，天线越多需要的空间就越多，并且各天线还需要考虑隔离度等问题，使得终端的设计越来越难。而且天线越多，成本也就越大，不符合电子产品功能多样化、体积微型化、价格低的要求。
因而现有技术还有待改进和提高。
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NFC功能与FM-TX发送功能共用天线的移动终端，通过减少移动终端的天线，节约移动终端整机的空间。
为了达到上述目的，本发明采取了以下技术方案：
一种NFC功能与FM-TX发送功能共用天线的移动终端，在所述移动终端内设置有基带芯片、NFC芯片、FM芯片和天线，所述NFC芯片和FM芯片分别与基带芯片连接，其中，所述移动终端内还设置有选通单元；所述选通单元分别与基带芯片、NFC芯片、FM芯片和天线连接，用于根据基带芯片的控制导通NFC芯片与天线之间的通路或者导通FM芯片与天线之间的通路。
所述的NFC功能与FM-TX发送功能共用天线的移动终端，其中，所述基带芯片用于控制FM芯片的工作状态和选通单元的导通状态；在所述基带芯片控制FM芯片开始工作时，同时控制选通单元导通FM芯片与天线101之间的通路；在所述基带芯片控制FM芯片停止工作时，同时控制选通单元导通NFC芯片与天线101之间的通路。
所述的NFC功能与FM-TX发送功能共用天线的移动终端，其中，所述天线为双频天线。
所述的NFC功能与FM-TX发送功能共用天线的移动终端，其中，所述选通单元为模拟单刀双掷开关，所述模拟单刀双掷开关的双掷头分别与NFC芯片和FM芯片连接。
所述的NFC功能与FM-TX发送功能共用天线的移动终端，其中，所述移动终端为手机或者移动电视。
本发明提供的NFC功能与FM-TX发送功能共用天线的移动终端，将移动终端的实现NFC功能的天线和实现FM-TX发送功能的天线共用同一根天线，通过选通单元选择导通相应功能的通路，为移动终端节省了一根天线，节约了移动终端整机的空间，同时还降低了移动终端的成本。
附图说明
图1为本发明NFC功能与FM-TX发送功能共用天线的移动终端的结构框图。
图2为本发明NFC功能与FM-TX发送功能共用天线的移动终端的原理框。
具体实施方式
本发明提供一种NFC功能与FM-TX发送功能共用天线的移动终端，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。
NFC射频信号频率为13.5MHz，FM的射频信号频率为76MHz到108MHz。对于无线信号来说，这两者都属于低频信号范围，其谐振点都在低频范围内，因此，移动终端的NFC天线和FM天线可以共用，本发明根据这一原理提供一种NFC功能与FM-TX发送功能共用一根天线的移动终端。
请参阅图1和图2，本发明实施例提供的NFC功能与FM-TX发送功能共用天线的移动终端包括基带芯片、NFC芯片、FM芯片、天线101和选通单元。
所述NFC芯片通过I2C总线与基带芯片连接，用于实现近距离传输功能；FM芯片为带有TX发送功能的芯片，其通过I2C总线与基带芯片连接，用于实现数字广播信号功能。所述选通单元分别与基带芯片、NFC芯片、FM芯片和天线101连接，用于根据基带芯片的控制选择导通NFC芯片与天线101之间的通路或者导通FM芯片与天线101之间的通路。
所述基带芯片为移动终端的主控设备，用于实现移动终端的基本操作，其中，所述基带芯片用于控制FM芯片的工作状态和选通单元的导通状态；在所述基带芯片控制FM芯片开始工作时，同时控制选通单元导通FM芯片与天线101之间的通路；所述基带芯片控制FM芯片停止工作时，同时控制选通单元导通NFC芯片与天线101之间的通路。
在具体实施时，NFC功能通常用于非接触式IC卡或者非接触式IC读卡器使用，FM-TX用于数字广播信号发送。因此，NFC功能和FM-TX发送功能，不会在同一时间使用。
从移动终端的控制流程来说，FM-TX发送的数据，是由移动终端基带芯片产生，通过I2C总线传输给FM芯片，再由FM芯片调制成数字广播信号往外发送。使用这一功能时，基带芯片作为移动终端主控设备，能控制数据发送的整个流程，它知道什么时候需要发送数据，什么时候数据发送结束，而且在发送完数据后，基带芯片将自动控制FM芯片停止工作，从而降低移动终端的耗电。
而NFC功能，如果作为非接触式IC卡时，属于被动设备，在使用这一功能时，其流程由外部读卡器进行控制，即外部读卡器为主控设备，因此，NFC芯片需随时等待外部读卡器的操作。即使NFC功能作为读卡器使用，也是需要随时等待外部非接触IC卡靠近后，才能继续后续处理。
可见在移动终端的使用过程中，NFC芯片需要长期使用到天线101，以等待外部读卡器或卡的靠近。因此本发明实施例提供的NFC功能与FM-TX发送功能共用天线的移动终端，其选通单元设置为默认接通NFC射频信号，即NFC芯片与天线之间的通路默认导通。当移动终端开启FM-TX功能时，在发送数据之前，基带芯片控制选通单元切换接通FM芯片与天线101之间的通路，FM芯片便可以通过天线101向外发送数据。由于基带芯片为移动终端的主控设备，它能检测到数据什么时候发送完，在发送结束后，基带芯片控制选通单元切换到默认状态，即接通NFC芯片与天线导通的状态。
因为本发明提供的NFC功能与FM-TX发送功能共用天线的移动终端将天线接通NFC芯片的功能为默认功能，不需要做任何软件修改，因此NFC功能的使用不需要额外操作，与普通的移动终端操作完全一样。
请继续参阅图2，所述选通单元为模拟单刀双掷开关102，所述模拟单刀双掷开关102的两个固定触点分别与NFC芯片和FM芯片连接，其切换状态直接通过基带芯片控制，无需人为操作。所述天线为双频天线，该双频天线具有两个谐振点，只要能实现NFC射频信号发送和TX数字广播信号发送即可。
本实施例中，所述移动终端为手机或者移动电视，以下以移动终端为手机，对FM-TX发送功能和NFC功能共用天线的控制方式进行详细描述：基带芯片控制NFC芯片和天线之间的通路为常开状态，当移动终端需要使用FM-TX功能时，FM芯片开始工作，基带芯片准备好需发送的数据；之后，基带芯片控制选通单元切换，导通双频天线与FM芯片之间的通路，发送FM-TX数据；在数据发送结束后，基带芯片控制选通单元切换导通状态，导通NFC芯片与天线之间的通路。
综上所述，本发明提供的NFC功能与FM-TX发送功能共用天线的移动终端，基于NFC天线和FM-TX天线都为低频范围内特点，以及NFC和FM-TX功能的使用特点，将移动终端实现NFC功能的天线和实现FM-TX发送功能的天线共用同一根天线，通过选通单元导通相应功能的通路，为移动终端节省了一根天线，有效减少了对移动终端空间的要求，大大降低了移动终端开发的难度和周期，改善了移动终端的电路布局和结构设计，也因为较少天线个数而节约了天线制作模具的成本。
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 (5)

  1. 一种NFC功能与FM-TX发送功能共用天线的移动终端，在所述移动终端内设置有基带芯片、NFC芯片、FM芯片和天线，所述NFC芯片和FM芯片分别与基带芯片连接，其特征在于，所述移动终端内还设置有选通单元；所述选通单元分别与基带芯片、NFC芯片、FM芯片和天线连接，用于根据基带芯片的控制导通NFC芯片与天线之间的通路或者导通FM芯片与天线之间的通路。
  2. 根据权利要求1所述的NFC功能与FM-TX发送功能共用天线的移动终端，其特征在于，所述基带芯片用于控制FM芯片的工作状态和选通单元导通的导通状态；在所述基带芯片控制FM芯片开始工作时，同时控制选通单元导通FM芯片与天线101之间的通路；在所述基带芯片控制FM芯片停止工作时，同时控制选通单元导通NFC芯片与天线101之间的通路。
  3. 根据权利要求1或2所述的NFC功能与FM-TX发送功能共用天线的移动终端，其特征在于，所述天线为双频天线。
  4. 根据权利要求1或2所述的NFC功能与FM-TX发送功能共用天线的移动终端，其特征在于，所述选通单元为模拟单刀双掷开关，所述模拟单刀双掷开关的双掷头分别与NFC芯片和FM芯片连接。
  5. 根据权利要求1所述的模拟电视与FM调频广播共用天线的移动终端，其特征在于，所述移动终端为手机或者移动电视。
PCT/CN2012/074228 2011-04-21 2012-04-17 Nfc功能与fm-tx发送功能共用天线的移动终端 WO2012142942A1 (zh)

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ES12774389T ES2718123T3 (es) 2011-04-21 2012-04-17 Terminal móvil que tiene una antena para implementar una función NFC y una función de envío FM-TX
EP12774389.6A EP2701455B1 (en) 2011-04-21 2012-04-17 Mobile terminal having one antenna to implement nfc function and fm-tx sending function
US13/979,301 US8989809B2 (en) 2011-04-21 2012-04-17 Mobile terminal using common antenna for performing NFC function and FM-TX function

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