WO2017124908A1 - 一种天线调谐方法及装置 - Google Patents

一种天线调谐方法及装置 Download PDF

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Publication number
WO2017124908A1
WO2017124908A1 PCT/CN2016/113747 CN2016113747W WO2017124908A1 WO 2017124908 A1 WO2017124908 A1 WO 2017124908A1 CN 2016113747 W CN2016113747 W CN 2016113747W WO 2017124908 A1 WO2017124908 A1 WO 2017124908A1
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WIPO (PCT)
Prior art keywords
tuning
signal
standing wave
network
tuning network
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PCT/CN2016/113747
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English (en)
French (fr)
Inventor
曾蓁
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Nubia Technology Co Ltd
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Nubia Technology Co Ltd
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    • 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
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B1/0458—Arrangements for matching and coupling between power amplifier and antenna or between amplifying stages
    • 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
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • 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
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/18—Input circuits, e.g. for coupling to an antenna or a transmission line
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/10—Monitoring; Testing of transmitters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/10—Monitoring; Testing of transmitters
    • H04B17/101—Monitoring; Testing of transmitters for measurement of specific parameters of the transmitter or components thereof
    • H04B17/102—Power radiated at antenna
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/10—Monitoring; Testing of transmitters
    • H04B17/101—Monitoring; Testing of transmitters for measurement of specific parameters of the transmitter or components thereof
    • H04B17/103—Reflected power, e.g. return loss
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/10—Monitoring; Testing of transmitters
    • H04B17/11—Monitoring; Testing of transmitters for calibration
    • H04B17/12—Monitoring; Testing of transmitters for calibration of transmit antennas, e.g. of the amplitude or phase
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/20—Monitoring; Testing of receivers
    • H04B17/21—Monitoring; Testing of receivers for calibration; for correcting measurements
    • H04B17/22—Monitoring; Testing of receivers for calibration; for correcting measurements for calibration of the receiver components
    • H04B17/221—Monitoring; Testing of receivers for calibration; for correcting measurements for calibration of the receiver components of receiver antennas, e.g. as to amplitude or phase

Definitions

  • the present application relates to, but is not limited to, the field of communication technologies, and in particular, to an antenna tuning method and apparatus.
  • the standing wave is often too large due to the impedance matching problem, so that the signal passing through the amplifier is not completely transmitted through the antenna, and the reflected energy may also damage the components in the circuit. Even the system is not working.
  • the RF circuit part of many electronic terminal equipment often measures the load impedance and the standing wave parameters through the instrument, and then improves the impedance parameters in hardware to make the impedance match more to reduce the influence of the reflected signal on the circuit.
  • This paper proposes an antenna tuning method, circuit and device, which can solve the problem that the standing wave is too large and changes in real time, which can not make the antenna better tuned.
  • An embodiment of the present invention provides an antenna tuning method, where the method includes:
  • the tuning network is driven step by step to obtain better matching tuning network parameters
  • the initial tuning signal is again tuned by better matching tuning network parameters and transmitted from the antenna.
  • determining whether the standing wave ratio of the initial tuning signal is greater than a preset threshold includes:
  • the standing wave ratio is compared to a preset threshold.
  • the calculating, by the CPU operation unit, the standing wave ratio of the standing wave includes:
  • the DC acquisition module collects an incident voltage value of the incident power coupled signal
  • Calculating the ratio of the reflected voltage value to the incident voltage value by the CPU operation unit is the reflection coefficient Using formula Find the standing wave ratio VSWR.
  • the tuning network comprises a capacitive frame and an inductive frame.
  • the step of driving the tuning network stepwise to obtain a better matching tuning network parameter driving the tuning network step by step, and stopping the adjustment when the adjusted tuning wave to the signal tuning VSWR is less than or equal to the preset threshold Tune the network.
  • the matching tuning network parameters include an inductance parameter and a capacitance parameter.
  • the capacitance value of the capacitor is changed by adjusting the control voltage of the capacitor, and the inductance value of the inductor is changed by controlling the opening and closing of the switch to adjust the tuning network.
  • the stepwise driving of the tuning network to obtain better matching tuning network parameters includes:
  • the inductance or capacitance is stepwise adjusted according to the moving characteristics of the load impedance of the Smith smith chart to obtain better matching tuning network parameters.
  • An embodiment of the present invention further provides an antenna tuning circuit, including:
  • An amplifier configured to amplify the input signal and output to the tuning network to be tuned to the initial tuning signal
  • a detecting circuit configured to determine whether a standing wave ratio of the initial tuning signal is greater than a preset threshold; if yes, driving the tuning network stepwise to obtain a better matching tuning network parameter;
  • Tuning the network setting the initial tuning of the signal output by the amplifier, and better
  • the matching tuning network parameters re-tune the initial tuning signal.
  • the detecting circuit includes: a bidirectional coupler, a first detecting circuit sequentially connected, a first low pass filter and a first DC collecting module, and a second detecting circuit and a second low pass filter sequentially connected And a second DC acquisition module, and a CPU operation unit;
  • the bidirectional coupler is configured to couple the reflected power coupling signal and the incident power coupling signal from the initial tuning signal
  • the first detection circuit is configured to convert the reflected power coupling signal from an alternating current signal to a direct current signal
  • the first low pass filter is configured to filter high frequency clutter of the reflected power coupled signal
  • the first DC acquisition module is configured to convert the reflected power coupling signal from an analog value to a digital value as a reflected voltage value;
  • the second detection circuit is configured to convert the incident power coupling signal from an alternating current signal to a direct current signal ;
  • the second low pass filter is configured to filter high frequency clutter of the incident power coupling signal
  • the second DC acquisition module is configured to convert the incident power coupling signal from an analog value to a digital value as an incident voltage value
  • the CPU arithmetic unit is configured to calculate a reflection coefficient and a standing wave ratio by the reflected voltage value and the incident voltage value.
  • the CPU operation unit is configured to calculate a reflection coefficient and a standing wave ratio by using the reflected voltage value and the incident voltage value as:
  • Calculating the ratio of the reflected voltage value to the incident voltage value by the CPU operation unit is the reflection coefficient Using formula Find the standing wave ratio VSWR.
  • the tuning network comprises a capacitive frame and an inductive frame.
  • the detecting circuit is configured to gradually drive the tuning network, and stop adjusting the tuning network when the adjusted tuned network to signal tuning VSWR is less than or equal to the preset threshold.
  • the detecting circuit is configured to change a capacitance value of the capacitor by adjusting a control voltage of the capacitor, and change an inductance value of the inductor by controlling opening and closing of the switch to adjust the tuning network.
  • the detecting circuit is configured to perform a moving characteristic according to a load impedance of a smith chart Step-by-step adjustment of the inductor or capacitor for better matching tuning network parameters.
  • An embodiment of the present invention further provides an antenna tuning apparatus, including:
  • a receiving module configured to receive a signal output by the amplifier and send the signal to the tuning network
  • a determining module configured to determine whether a standing wave ratio of the initial tuning signal is greater than a preset threshold
  • the matching module is configured to gradually drive the tuning network when the standing wave ratio is greater than a preset threshold to obtain better matching tuning network parameters
  • a tuning module is arranged to initially tune the signal output by the amplifier to obtain an initial tuning signal and to re-tune the initial tuning signal by a better matching tuning network parameter.
  • the determining module includes:
  • the standing wave detecting unit is configured to perform standing wave detection on the initial tuning signal in real time or timing;
  • a calculation unit configured to calculate a standing wave ratio of the standing wave by a CPU operation unit
  • a comparison unit is arranged to compare the standing wave ratio with a preset threshold.
  • the matching module is configured to gradually drive the tuning network, and stop adjusting the tuning network when the adjusted tuned network to signal tuning VSWR is less than or equal to the preset threshold.
  • the matching module is configured to change a capacitance value of the capacitor by adjusting a control voltage of the capacitor, and change an inductance value of the inductor by controlling opening and closing of the switch to adjust the tuning network.
  • the matching module is configured to gradually adjust the inductance or capacitance according to a moving characteristic of a smith chart load impedance to obtain a better matching tuning network parameter.
  • Embodiments of the present invention further provide a computer readable storage medium storing computer executable instructions that are implemented by a processor to implement the antenna tuning method described above.
  • An antenna tuning method, circuit and device include: receiving a signal output by an amplifier, and performing initial tuning on the signal through a tuning network; determining whether a standing wave ratio of the initial tuning signal is greater than a pre- The threshold is set; if so, the tuning network is driven step by step to obtain better matching tuning network parameters; the initial tuning signal is tuned again by better matching tuning network parameters, and is transmitted from the antenna, and the embodiment of the present invention passes intelligent detection.
  • the standing wave and the tuning network are matched to better, so that the standing wave ratio is smaller and the energy radiated through the antenna is more.
  • FIG. 1 is a schematic structural diagram of hardware of a mobile terminal embodying an optional embodiment of the present invention
  • FIG. 2 is a schematic diagram of a wireless communication system of the mobile terminal shown in FIG. 1;
  • FIG. 3 is a flowchart of an antenna tuning method according to Embodiment 1 of the present invention.
  • FIG. 4 is a schematic diagram showing the composition of a tuning network according to an application example of the present invention.
  • Figure 5 is a Smith model diagram
  • FIG. 6 is a flowchart of an antenna tuning method according to Embodiment 2 of the present invention.
  • FIG. 7 is a circuit diagram of an antenna tuning circuit according to Embodiment 3 of the present invention.
  • FIG. 8 is a block diagram showing a functional exemplary structure of an antenna tuning apparatus according to Embodiment 4 of the present invention.
  • FIG. 9 is a block diagram showing the functional exemplary structure of the judging module of FIG. 8.
  • the mobile terminal can be implemented in a variety of forms.
  • the terminals described herein may include, for example, mobile phones, smart phones, notebook computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Tablets), PMPs (Portable Multimedia Players), navigation devices, and the like.
  • Mobile terminals and fixed terminals such as digital TVs, desktop computers, and the like.
  • the terminal is a mobile terminal.
  • configurations in accordance with embodiments of the present invention can be applied to fixed type terminals in addition to components that are specifically for mobile purposes.
  • FIG. 1 is a schematic diagram showing the hardware structure of a mobile terminal implementing an alternative embodiment of the present invention.
  • the mobile terminal 100 may include a wireless communication unit 110, an A/V (Audio/Video) input unit 120, a user input unit 130, a sensing unit 140, an output unit 150, a memory 160, an interface unit 170, a controller 180, and a power supply unit 190. and many more.
  • Figure 1 illustrates a mobile terminal having various components, but it should be understood that not all illustrated components are required to be implemented. More or fewer components can be implemented instead. The elements of the mobile terminal will be described in detail below.
  • Wireless communication unit 110 typically includes one or more components that permit radio communication between mobile terminal 100 and a wireless communication system or network.
  • the wireless communication unit may include at least one of a broadcast receiving module 111, a mobile communication module 112, a wireless internet module 113, and a short-range communication module 114.
  • the broadcast receiving module 111 receives a broadcast signal and/or broadcast associated information from an external broadcast management server via a broadcast channel.
  • the broadcast channel can include a satellite channel and/or a terrestrial channel.
  • the broadcast management server may be a server that generates and transmits a broadcast signal and/or broadcast associated information or a server that receives a previously generated broadcast signal and/or broadcast associated information and transmits it to the terminal.
  • the broadcast signal may include a TV broadcast signal, a radio broadcast signal, a data broadcast signal, and the like.
  • the broadcast signal may further include a broadcast signal combined with a TV or radio broadcast signal.
  • the broadcast associated information may also be provided via a mobile communication network, and in this case, the broadcast associated information may be received by the mobile communication module 112.
  • the broadcast signal may exist in various forms, for example, it may exist in the form of Digital Multimedia Broadcasting (DMB) Electronic Program Guide (EPG), Digital Video Broadcasting Handheld (DVB-H) Electronic Service Guide (ESG), and the like.
  • the broadcast receiving module 111 can receive a signal broadcast by using a plurality of types of broadcast systems.
  • the broadcast receiving module 111 can use forward link media (MediaFLO) by using, for example, multimedia broadcast-terrestrial (DMB-T), digital multimedia broadcast-satellite (DMB-S), digital video broadcast-handheld (DVB-H)
  • MediaFLO forward link media
  • DMB-T multimedia broadcast-terrestrial
  • DMB-S digital multimedia broadcast-satellite
  • DVD-H digital video broadcast-handheld
  • the digital broadcasting system of the @ data broadcasting system
  • the terrestrial digital broadcasting integrated service (ISDB-T) and the like receives digital broadcasting.
  • the broadcast receiving module 111 can be constructed as a broadcast system suitable for providing a broadcast signal as well as the above-described digital broadcast system.
  • the broadcast signal and/or broadcast associated information received via the broadcast receiving module 111 may be stored in the memory 160 (or other type of storage medium).
  • the mobile communication module 112 transmits the radio signals to and/or receives radio signals from at least one of a base station (e.g., an access point, a Node B, etc.), an external terminal, and a server.
  • a base station e.g., an access point, a Node B, etc.
  • Such radio signals may include voice call signals, video call signals, or according to text and/or multimedia messages Multiple types of data sent and/or received.
  • the wireless internet module 113 supports wireless internet access of the mobile terminal.
  • the module can be internally or externally coupled to the terminal.
  • the wireless Internet access technologies involved in the module may include WLAN (Wireless LAN) (Wi-Fi), Wibro (Wireless Broadband), Wimax (Worldwide Interoperability for Microwave Access), HSDPA (High Speed Downlink Packet Access), etc. .
  • the short range communication module 114 is configured to support short range communication.
  • Some examples of short-range communication technology include Bluetooth TM, a radio frequency identification (RFID), infrared data association (IrDA), ultra wideband (UWB), ZigBee, etc. TM.
  • the A/V input unit 120 is arranged to receive an audio or video signal.
  • the A/V input unit 120 may include a camera 121 and a microphone 122 that processes image data of still pictures or video obtained by the image capturing device in a video capturing mode or an image capturing mode.
  • the processed image frame can be displayed on the display unit 151.
  • the image frames processed by the camera 121 may be stored in the memory 160 (or other storage medium) or transmitted via the wireless communication unit 110, and two or more cameras 121 may be provided according to the configuration of the mobile terminal.
  • the microphone 122 can receive sound (audio data) via a microphone in an operation mode of a telephone call mode, a recording mode, a voice recognition mode, and the like, and can process such sound as audio data.
  • the processed audio (voice) data can be converted to a format output that can be transmitted to the mobile communication base station via the mobile communication module 112 in the case of a telephone call mode.
  • the microphone 122 may pass noise cancellation (or suppression) algorithms to cancel (or suppress) noise or interference generated during the process of receiving and transmitting audio signals.
  • the sensing unit 140 detects the current state of the mobile terminal 100 (eg, the open or closed state of the mobile terminal 100), the location of the mobile terminal 100, the presence or absence of contact (ie, touch input) by the user with the mobile terminal 100, and the mobile terminal.
  • the sensing unit 140 can sense whether the slide type phone is turned on or off.
  • the sensing unit 140 can detect whether the power supply unit 190 provides power or whether the interface unit 170 is coupled to an external device.
  • the interface unit 170 serves as an interface through which at least one external device can connect with the mobile terminal 100.
  • the external device may include a wired or wireless headset port, an external power source (or battery charger) port, a wired or wireless data port, a memory card port, and a device for connecting the identification module. Ports, audio input/output (I/O) ports, video I/O ports, headphone ports, and more.
  • the identification module may be stored to verify a variety of information used by the user using the mobile terminal 100 and may include a User Identification Module (UIM), a Customer Identification Module (SIM), a Universal Customer Identification Module (USIM), and the like.
  • the device having the identification module may take the form of a smart card, and thus the identification device may be connected to the mobile terminal 100 via a port or other connection device.
  • the interface unit 170 may be arranged to receive input (eg, data information, power, etc.) from an external device and transmit the received input to one or more components within the mobile terminal 100 or may be configured to be at the mobile terminal and external device Transfer data between.
  • the interface unit 170 may function as a path through which power is supplied from the base to the mobile terminal 100 or may be used as a plurality of command signals allowed to be input from the base to be transmitted to the mobile The path to the terminal.
  • a variety of command signals or power input from the base can be used as a signal for identifying whether the mobile terminal is accurately mounted on the base.
  • Output unit 150 is configured to provide an output signal (eg, an audio signal, a video signal, an alarm signal, a vibration signal, etc.) in a visual, audio, and/or tactile manner.
  • the output unit 150 may include an audio output module 152, an alarm unit 153, and the like.
  • the audio output module 152 may convert audio data received by the wireless communication unit 110 or stored in the memory 160 when the mobile terminal is in a call signal receiving mode, a call mode, a recording mode, a voice recognition mode, a broadcast receiving mode, and the like.
  • the audio signal is output as sound.
  • the audio output module 152 can provide audio output (eg, call signal reception sound, message reception sound, etc.) associated with a particular function performed by the mobile terminal 100.
  • the audio output module 152 can include a speaker, a buzzer, and the like.
  • the alarm unit 153 can provide an output to notify the mobile terminal 100 of the occurrence of an event. Typical events may include call reception, message reception, key signal input, touch input, and the like. In addition to audio or video output, the alert unit 153 can provide an output in a different manner to notify of the occurrence of an event. For example, the alarm unit 153 can provide an output in the form of vibrations, and when a call, message, or some other incoming communication is received, the alarm unit 153 can provide a tactile output (ie, vibration) to notify the user of it. By providing such a tactile output, the user is able to recognize the occurrence of an event even when the user's mobile phone is in the user's pocket. The alarm unit 153 can also provide an output of the notification event occurrence via the audio output module 152.
  • the memory 160 may store a software program or the like for processing and control operations performed by the controller 180, or may temporarily store data (for example, a phone book, a message, a still image, a video, etc.) that has been output or is to be output. Moreover, the memory 160 may store data regarding vibration and audio signals of various manners that are output when a touch is applied to the touch screen.
  • the memory 160 may include at least one type of storage medium including a flash memory, a hard disk, a multimedia card, a card type memory (eg, SD or DX memory, etc.), a random access memory (RAM), a static random access memory ( SRAM), read only memory (ROM), electrically erasable programmable read only memory (EEPROM), programmable read only memory (PROM), magnetic memory, magnetic disk, optical disk, and the like.
  • the mobile terminal 100 can cooperate with a network storage device that performs a storage function of the memory 160 through a network connection.
  • the controller 180 typically controls the overall operation of the mobile terminal. For example, the controller 180 performs the control and processing associated with voice calls, data communications, video calls, and the like.
  • the controller 180 may include a multimedia module 181 for reproducing (or playing back) multimedia data, which may be constructed within the controller 180 or may be configured to be separate from the controller 180.
  • the controller 180 may perform a pattern recognition process to recognize a handwriting input or a picture drawing input performed on the touch screen as a character or an image.
  • the power supply unit 190 receives external power or internal power under the control of the controller 180 and provides appropriate power required to operate each component and component.
  • the embodiments described herein can be implemented in a computer readable medium using, for example, computer software, hardware, or any combination thereof.
  • the embodiments described herein may be through the use of application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays ( An FPGA, a processor, a controller, a microcontroller, a microprocessor, at least one of the electronic units designed to perform the functions described herein, in some cases, such an embodiment may be at the controller 180 Implemented in the middle.
  • implementations such as procedures or functions may be implemented with separate software modules that permit the execution of at least one function or operation.
  • the software code can be implemented by a software application (or program) written in any suitable programming language, which can be stored in memory 160 and executed by controller
  • a slide type mobile terminal among various types of mobile terminals such as a folding type, a bar type, a swing type, a slide type mobile terminal, and the like is taken as an example. Therefore, the embodiment of the present invention can be applied to any type of mobile terminal, and is not limited to a slide type mobile terminal.
  • the mobile terminal 100 as shown in FIG. 1 may be configured to operate using a communication system such as a wired and wireless communication system and a satellite-based communication system that transmits data via frames or packets.
  • a communication system such as a wired and wireless communication system and a satellite-based communication system that transmits data via frames or packets.
  • a communication system in which a mobile terminal is operable according to an embodiment of the present invention will now be described with reference to FIG.
  • Such communication systems may use different air interfaces and/or physical layers.
  • air interfaces used by communication systems include, for example, Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Code Division Multiple Access (CDMA), and Universal Mobile Telecommunications System (UMTS) (in particular, Long Term Evolution (LTE)). ), Global System for Mobile Communications (GSM), etc.
  • FDMA Frequency Division Multiple Access
  • TDMA Time Division Multiple Access
  • CDMA Code Division Multiple Access
  • UMTS Universal Mobile Telecommunications System
  • LTE Long Term Evolution
  • GSM Global System for Mobile Communications
  • the following description relates to a CDMA communication system, but such teachings are equally applicable to other types of systems.
  • a CDMA wireless communication system can include a plurality of mobile terminals 100, a plurality of base stations (BS) 270, a base station controller (BSC) 275, and a mobile switching center (MSC) 280.
  • the MSC 280 is configured to interface with a public switched telephone network (PSTN) 290.
  • PSTN public switched telephone network
  • the MSC 280 is also configured to interface with a BSC 275 that can be coupled to the base station 270 via a backhaul line.
  • the backhaul line can be constructed in accordance with any of a number of known interfaces including, for example, E1/T1, ATM, IP, PPP, Frame Relay, HDSL, ADSL, or xDSL. It will be appreciated that the system as shown in FIG. 2 can include multiple BSCs 275.
  • Each BS 270 can serve one or more partitions (or regions), each of which is covered by a multi-directional antenna or an antenna directed to a particular direction radially away from the BS 270. Alternatively, each partition may be covered by two or more antennas for diversity reception. Each BS 270 can be configured to support multiple frequency allocations, and each frequency allocation has a particular frequency spectrum (eg, 1.25 MHz, 5 MHz, etc.).
  • BS 270 may also be referred to as a Base Transceiver Subsystem (BTS) or other equivalent terminology.
  • BTS Base Transceiver Subsystem
  • the term "base station” can be used to generally refer to a single BSC 275 and at least one BS 270.
  • a base station can also be referred to as a "cell station.”
  • multiple partitions of a particular BS 270 may be referred to as multiple cellular stations.
  • a broadcast transmitter (BT) 295 transmits a broadcast signal to the mobile terminal 100 operating within the system.
  • a broadcast receiving module 111 as shown in FIG. 1 is provided at the mobile terminal 100 to receive a broadcast signal transmitted by the BT 295.
  • GPS Global Positioning System
  • the satellite 300 helps locate at least one of the plurality of mobile terminals 100.
  • a plurality of satellites 300 are depicted, but it is understood that useful positioning information can be obtained using any number of satellites.
  • the GPS module 115 as shown in Figure 1 is typically configured to cooperate with the satellite 300 to obtain desired positioning information. Instead of GPS tracking technology or in addition to GPS tracking technology, other techniques that can track the location of the mobile terminal can be used. Additionally, at least one GPS satellite 300 can selectively or additionally process satellite DMB transmissions.
  • the BS 270 receives a reverse link signal from the mobile terminal 100.
  • Mobile terminal 100 typically participates in calls, messaging, and other types of communications.
  • Each reverse link signal received by a particular base station 270 is processed within a particular BS 270.
  • the obtained data is forwarded to the relevant BSC 275.
  • the BSC provides call resource allocation and coordinated mobility management functions including a soft handoff procedure between the BSs 270.
  • the BSC 275 also routes the received data to the MSC 280, which provides additional routing services for interfacing with the PSTN 290.
  • PSTN 290 interfaces with MSC 280, which forms an interface with BSC 275, and BSC 275 controls BS 270 accordingly to transmit forward link signals to mobile terminal 100.
  • a first embodiment of the present invention provides an antenna tuning method, where the method includes the following steps:
  • step S20 determining whether the standing wave ratio of the initial tuning signal is greater than a preset threshold, and if so, executing step S30, and if not, executing step S31;
  • step by step drive the tuning network, obtain better matching tuning network parameters, and perform step S40;
  • the initial tuning signal is re-tuned by the better matching tuning network parameter and transmitted from the antenna.
  • the smart wave is detected and the tuning network is matched to be better, so that The standing wave ratio is smaller and the energy radiated through the antenna is more.
  • the signal to be transmitted is first amplified by the amplifier PA and then transmitted from the antenna through the tuned network.
  • a bidirectional coupler is added after the amplifier and the tuned network to couple the reflected power with a certain attenuation ratio.
  • the size of the signal and the incident power signal, the coupled signal is an AC signal.
  • DC acquisition can be performed.
  • LPF low-pass filter
  • the DC signal is from the DC acquisition module AD.
  • the CPU operation unit recognizes the analog voltage through the analog-to-digital converter.
  • the detection circuit includes a first detection circuit and a second detection circuit, and the first detection circuit is configured to receive the reflected power coupling signal.
  • a second detection circuit configured to receive an incident power coupling signal, the first detection circuit being coupled to the first low pass filter, the first low pass filter being coupled to the first DC acquisition module, the first straight
  • the flow collection module sends the reflected voltage value of the reflected power coupling signal to the CPU operation unit;
  • the second detection circuit is connected to the second low-pass filter, and the second low-pass filter is connected to the second DC acquisition module, and the second DC acquisition module sends the incident voltage value of the incident power coupling signal to the CPU.
  • An arithmetic unit; the CPU operation unit calculates a ratio of the reflected voltage value to the incident voltage value as a reflection coefficient Using formula The standing wave ratio VSWR is obtained. At this time, it is determined whether the standing wave ratio is greater than a preset threshold.
  • the tuning network is gradually driven to obtain a better matching tuning network parameter; if the standing wave ratio is If the threshold is less than or equal to the preset threshold, the signal is directly transmitted from the antenna; in the ideal state, the standing wave ratio of 1 indicates that the signal is completely transmitted through the antenna, and there is no reflected energy, which is only an ideal.
  • the state, and the preset threshold in this embodiment may be a value slightly larger than 1, for example, 2, determined by the tuning efficiency, may be preset in the antenna transceiver circuit, or may be manually set.
  • the tuning network is mainly composed of a capacitor frame and an inductor frame, and the matching tuning network parameters include an inductance parameter and a capacitance parameter, and a better matching state can be achieved by adjusting parameters of the inductor and the capacitor.
  • FIG. 4 it is a schematic diagram of a tuning network composition according to an application example of the present invention.
  • the tuning network is composed of an inductor and a capacitor.
  • the capacitor is tuned by a capacitor tuner scheme.
  • the tuning of the inductor uses the opening and closing of the control switch. When the corresponding switch is closed, it is equivalent to less inductance value. Conversely, when the switch is opened, it is equivalent to increasing the inductive reactance in the circuit, so that the inductance can be changed. Inductance value.
  • the capacitance and inductance are changed to reach the standing wave ratio VSWR less than or equal to a preset threshold, for example, less than or equal to 2, the tuning network can be considered to be relatively Good state, stop tuning.
  • the smith chart is one of the effective methods for analyzing the transmission line matching problem.
  • the inductance or capacitance can be controlled step by step according to the moving characteristics of the smith chart load impedance. As shown in FIG. 5, when the parallel inductance capacitor has a frequency point, it moves around the conductance circle; when the inductor and capacitor are connected in series, the frequency point moves around the resistance circle. When it is detected that the standing wave ratio VSWR is less than or equal to a preset threshold value at a certain position, the movement is stopped, and the transmission is considered to be in a better state.
  • tuning network of the application example of the present invention shown in FIG. 4 is only an example, and the embodiment of the present invention is not limited thereto, and the tuning network may adopt various combinations of capacitors and inductors.
  • the step S20 shown includes:
  • the calculating the standing wave ratio of the standing wave by the CPU operation unit includes:
  • the DC acquisition module collects an incident voltage value of the incident power coupled signal
  • Calculating the ratio of the reflected voltage value to the incident voltage value by the CPU operation unit is the reflection coefficient Using formula Find the standing wave ratio VSWR.
  • an antenna tuning circuit including:
  • An amplifier PA configured to amplify the input signal and output to the tuning network to be tuned to the initial tuning signal
  • a detecting circuit configured to determine whether a standing wave ratio of the initial tuning signal is greater than a preset threshold; if yes, driving the tuning network stepwise to obtain a better matching tuning network parameter;
  • a tuning network is provided to initially tune a signal output by the amplifier and to re-tune the initial tuning signal by the better matching tuning network parameters.
  • the detecting circuit includes: a bidirectional coupler, a first detecting circuit sequentially connected, a first low pass filter LPF1 and a first DC collecting module AD1, a second detecting circuit sequentially connected, and a second a low pass filter LPF2 and a second DC acquisition module AD2, and a CPU arithmetic unit;
  • the bidirectional coupler is configured to couple the reflected power coupling signal and the incident power coupling signal from the initial tuning signal
  • the first detection circuit is configured to convert the reflected power coupling signal from an alternating current signal to a direct current signal
  • the first low pass filter is configured to filter high frequency clutter of the reflected power coupled signal
  • the first DC acquisition module is configured to convert the reflected power coupling signal from an analog value to a digital value as a reflected voltage value;
  • the second detection circuit is configured to convert the incident power coupling signal from an alternating current signal to a direct current signal ;
  • the second low pass filter is configured to filter high frequency clutter of the incident power coupling signal
  • the second DC acquisition module is configured to convert the incident power coupling signal from an analog value to a digital value as an incident voltage value
  • the CPU arithmetic unit is configured to calculate a reflection coefficient and a standing wave ratio by the reflected voltage value and the incident voltage value.
  • the CPU operation unit is set to:
  • the tuning network includes a capacitive frame and an inductive frame.
  • the detecting circuit is configured to gradually drive the tuning network, and when the adjusted tuned network to signal tuning VSWR is less than or equal to the preset threshold, stop adjusting the tuning network.
  • the detecting circuit is configured to change a capacitance value of the capacitor by adjusting a control voltage of the capacitor, and change an inductance value of the inductor by controlling opening and closing of the switch to adjust the tuning network.
  • the detecting circuit is configured to gradually adjust the inductance or capacitance according to the moving characteristic of the smith chart load impedance to obtain a better matching tuning network parameter.
  • an embodiment of the present invention further provides an antenna tuning apparatus, including:
  • the receiving module 10 is configured to receive a signal output by the amplifier and send the signal to the tuning network;
  • the determining module 20 is configured to determine whether the standing wave ratio of the initial tuning signal is greater than a preset threshold
  • the matching module 30 is configured to gradually drive the tuning network when the standing wave ratio is greater than a preset threshold to obtain better matching tuning network parameters;
  • the tuning module 40 is configured to initially tune the signal output by the amplifier to obtain an initial tuning signal, and to re-tune the initial tuning signal by the better matching tuning network parameter.
  • the determining module 20 includes:
  • the standing wave detecting unit 21 is configured to perform standing wave detection on the initial tuning signal in real time or timing;
  • the calculating unit 22 is configured to calculate a standing wave ratio of the standing wave by the CPU computing unit;
  • the comparing unit 23 is arranged to compare the standing wave ratio with a preset threshold.
  • the standing wave ratio is made smaller, and the energy radiated through the antenna is more.
  • the matching module is configured to gradually drive the tuning network, and when the adjusted tuned network to signal tuning VSWR is less than or equal to the preset threshold, stop adjusting the tuning network.
  • the matching module is configured to change a capacitance value of the capacitor by adjusting a control voltage of the capacitor, and change an inductance value of the inductor by controlling opening and closing of the switch to adjust The tuning network.
  • the matching module is configured to gradually adjust the inductance or capacitance according to the moving characteristic of the smith chart load impedance to obtain better matching tuning network parameters.
  • Embodiments of the present invention further provide a computer readable storage medium storing computer executable instructions that are implemented by a processor to implement the antenna tuning method described above.
  • the technical solution of the present application can be embodied in the form of a software product stored in a storage medium (such as a ROM/RAM, a magnetic disk, an optical disk), and includes a plurality of instructions for making one
  • the terminal device (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) performs the method described in the embodiments of the present invention.
  • the standing wave is intelligently detected and the tuning network is matched to be better, so that the standing wave ratio is smaller, and the energy radiated through the antenna is more.

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Abstract

本文公布一种天线调谐方法、电路及装置，所述方法包括：接收放大器输出的信号，并通过调谐网络对所述信号进行初次调谐；判断初次调谐信号的驻波比是否大于预设的阈值；若是，则逐步驱动调谐网络，获得更佳的匹配调谐网络参数；通过更佳的匹配调谐网络参数对所述初次调谐信号进行再次调谐，并从天线发射出去。

Description

一种天线调谐方法及装置 技术领域
本申请涉及但不限于通信技术领域，尤指一种天线调谐方法及装置。
背景技术
在通信系统的天线收发电路中，常常因为阻抗匹配问题导致驻波过大，而使得经过放大器的信号未能完全通过天线发射出去，并且反射回来的能量还会对电路中的元器件有损害作用甚至导致系统无法工作。很多电子终端设备的射频电路部分常常通过仪器测量其负载阻抗和驻波的参数，再在硬件上对阻抗的参数加以改进，使得阻抗更加匹配，以减少反射信号对电路的影响。
然而，手动的修改硬件匹配的参数在调试的过程中显得过于麻烦，工作量很大，并且系统发射频率会实时变化，不同的频率需要不同的匹配参数，无法使得天线调谐参数实现较佳。
发明内容
以下是对本文详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。
本文提出一种天线调谐方法、电路及装置，可以解决驻波过大且会实时变化，无法使得天线较佳调谐的问题。
本发明实施例提出一种天线调谐方法，所述方法包括：
接收放大器输出的信号，并通过调谐网络对所述信号进行初次调谐；
判断初次调谐信号的驻波比是否大于预设的阈值；
若是，则逐步驱动调谐网络，获得更佳的匹配调谐网络参数；
通过更佳的匹配调谐网络参数对所述初次调谐信号进行再次调谐，并从天线发射出去。
可选地，判断初次调谐信号的驻波比是否大于预设的阈值包括：
实时或者定时对初次调谐信号进行驻波检测；
通过CPU运算单元计算所述驻波的驻波比；
将所述驻波比与预设的阈值进行比较。
可选地，所述通过CPU运算单元计算所述驻波的驻波比包括：
通过双向耦合器从所述初次调谐信号中耦合得到反射功率耦合信号和入射功率耦合信号；
通过依次连接的第一检波电路、第一低通滤波器和第一直流采集模块采集反射功率耦合信号的反射电压值；通过依次连接的第二检波电路、第二低通滤波器和第二直流采集模块采集入射功率耦合信号的入射电压值；
通过CPU运算单元计算反射电压值与入射电压值的比值为反射系数
Figure PCTCN2016113747-appb-000001
利用公式
Figure PCTCN2016113747-appb-000002
求得驻波比VSWR。
可选地，所述调谐网络包括电容框架和电感框架。
所述逐步驱动调谐网络，获得更佳的匹配调谐网络参数的步骤中，逐步驱动调谐网络，当调整后的调谐网络对信号调谐的驻波比小于等于所述预设的阈值时，停止调整所述调谐网络。
可选地，所述匹配调谐网络参数包括电感参数和电容参数。
可选地，所述逐步驱动调谐网络，获得更佳的匹配调谐网络参数的步骤中，
通过调整电容的控制电压改变所述电容的电容值，通过控制开关的断开和闭合改变所述电感的电感值，以调整所述调谐网络。
可选地，所述逐步驱动调谐网络，获得更佳的匹配调谐网络参数包括：
根据史密斯smith圆图负载阻抗的移动特性对所述电感或电容进行逐步调整，获得更佳的匹配调谐网络参数。
本发明实施例还提出一种天线调谐电路，包括：
放大器，设置为将输入信号放大并输出到调谐网络调谐成初次调谐信号；
检测电路，设置为判断所述初次调谐信号的驻波比是否大于预设的阈值；若是，则逐步驱动调谐网络，获得更佳的匹配调谐网络参数；
调谐网络，设置为对所述放大器输出的信号进行初次调谐，并通过更佳 的匹配调谐网络参数对所述初次调谐信号进行再次调谐。
可选地，所述检测电路包括：双向耦合器，依次连接的第一检波电路、第一低通滤波器和第一直流采集模块，依次连接的第二检波电路、第二低通滤波器和第二直流采集模块，以及CPU运算单元；
其中，双向耦合器，设置为从所述初次调谐信号中耦合得到反射功率耦合信号和入射功率耦合信号；
所述第一检波电路设置为将反射功率耦合信号从交流信号转换为直流信号；
所述第一低通滤波器设置为滤除所述反射功率耦合信号的高频杂波；
所述第一直流采集模块设置为将所述反射功率耦合信号从模拟值转换成数字值，作为反射电压值；所述第二检波电路设置为将入射功率耦合信号从交流信号转换为直流信号；
所述第二低通滤波器设置为滤除所述入射功率耦合信号的高频杂波；
所述第二直流采集模块设置为将所述入射功率耦合信号从模拟值转换成数字值，作为入射电压值；
CPU运算单元设置为通过所述反射电压值与入射电压值计算反射系数和驻波比。
可选地，所述CPU运算单元设置为通过所述反射电压值与入射电压值计算反射系数和驻波比为：
通过CPU运算单元计算反射电压值与入射电压值的比值为反射系数
Figure PCTCN2016113747-appb-000003
利用公式
Figure PCTCN2016113747-appb-000004
求得驻波比VSWR。
可选地，所述调谐网络包括电容框架和电感框架。
可选地，所述检测电路设置为逐步驱动调谐网络，当调整后的调谐网络对信号调谐的驻波比小于等于所述预设的阈值时，停止调整所述调谐网络。
可选地，所述检测电路设置为通过调整电容的控制电压改变所述电容的电容值，通过控制开关的断开和闭合改变所述电感的电感值，以调整所述调谐网络。
可选地，所述检测电路设置为根据smith圆图负载阻抗的移动特性对所 述电感或电容进行逐步调整，获得更佳的匹配调谐网络参数。
本发明实施例还提出一种天线调谐装置，包括：
接收模块，设置为接收放大器输出的信号，并将所述信号发送至调谐网络；
判断模块，设置为判断初次调谐信号的驻波比是否大于预设的阈值；
匹配模块，设置为当驻波比大于预设的阈值时，逐步驱动调谐网络，获得更佳的匹配调谐网络参数；
调谐模块，设置为对所述放大器输出的信号进行初次调谐得到初次调谐信号，并通过更佳的匹配调谐网络参数对所述初次调谐信号进行再次调谐。
可选地，所述判断模块包括：
驻波检测单元，设置为实时或者定时对所述初次调谐信号进行驻波检测；
计算单元，设置为通过CPU运算单元计算所述驻波的驻波比；
比较单元，设置为将所述驻波比与预设的阈值进行比较。
可选地，所述匹配模块设置为逐步驱动调谐网络，当调整后的调谐网络对信号调谐的驻波比小于等于所述预设的阈值时，停止调整所述调谐网络。
可选地，所述匹配模块设置为通过调整电容的控制电压改变所述电容的电容值，通过控制开关的断开和闭合改变所述电感的电感值，以调整所述调谐网络。
可选地，所述匹配模块设置为根据smith圆图负载阻抗的移动特性对所述电感或电容进行逐步调整，获得更佳的匹配调谐网络参数。
本发明实施例还提出一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令被处理器执行时实现上述天线调谐方法。
本发明实施例提出的一种天线调谐方法、电路及装置，所述方法包括：接收放大器输出的信号，并通过调谐网络对所述信号进行初次调谐；判断初次调谐信号的驻波比是否大于预设的阈值；若是，则逐步驱动调谐网络，获得更佳匹配调谐网络参数；通过更佳匹配调谐网络参数对所述初次调谐信号进行再次调谐，并从天线发射出去，本发明实施例通过智能检测驻波并对调谐网络进行匹配至较佳，使得驻波比更小，通过天线辐射出去的能量更多。
在阅读并理解了附图和详细描述后，可以明白其他方面。
附图概述
图1为实现本发明一个可选的实施例的移动终端的硬件结构示意图；
图2为如图1所示的移动终端的无线通信系统示意图；
图3为本发明实施例一提供的天线调谐方法流程图；
图4为本发明应用实例的调谐网络组成示意图；
图5为Smith模型图；
图6为本发明实施例二提供的天线调谐方法流程图；
图7为本发明实施例三提供的天线调谐电路的电路图；
图8为本发明实施例四提供的天线调谐装置的功能性示范结构框图；
图9为图8中判断模块的功能性示范结构框图。
本发明的实施方式
应当理解，此处所描述的实施例仅仅用以解释本申请，并不用于限定本申请。
现在将参考附图描述实现本发明实施例的移动终端。在后续的描述中，使用用于表示元件的诸如“模块”、“部件”或“单元”的后缀仅为了有利于本发明实施例的说明，其本身并没有特定的意义。因此，"模块"与"部件"可以混合地使用。
移动终端可以以多种形式来实施。例如，本文中描述的终端可以包括诸如移动电话、智能电话、笔记本电脑、数字广播接收器、PDA(个人数字助理)、PAD(平板电脑)、PMP(便携式多媒体播放器)、导航装置等等的移动终端以及诸如数字TV、台式计算机等等的固定终端。下面，假设终端是移动终端。然而，本领域技术人员将理解的是，除了特别用于移动目的的元件之外，根据本发明的实施方式的构造也能够应用于固定类型的终端。
图1为实现本发明一个可选的实施例的移动终端的硬件结构示意图。
移动终端100可以包括无线通信单元110、A/V(音频/视频)输入单元120、用户输入单元130、感测单元140、输出单元150、存储器160、接口单元170、控制器180和电源单元190等等。图1示出了具有多种组件的移动终端，但是应理解的是，并不要求实施所有示出的组件。可以替代地实施更多或更少的组件。将在下面详细描述移动终端的元件。
无线通信单元110通常包括一个或多个组件，其允许移动终端100与无线通信系统或网络之间的无线电通信。例如，无线通信单元可以包括广播接收模块111、移动通信模块112、无线互联网模块113和短程通信模块114中的至少一个。
广播接收模块111经由广播信道从外部广播管理服务器接收广播信号和/或广播相关信息。广播信道可以包括卫星信道和/或地面信道。广播管理服务器可以是生成并发送广播信号和/或广播相关信息的服务器或者接收之前生成的广播信号和/或广播相关信息并且将其发送给终端的服务器。广播信号可以包括TV广播信号、无线电广播信号、数据广播信号等等。而且，广播信号可以进一步包括与TV或无线电广播信号组合的广播信号。广播相关信息也可以经由移动通信网络提供，并且在该情况下，广播相关信息可以由移动通信模块112来接收。广播信号可以以多种形式存在，例如，其可以以数字多媒体广播(DMB)的电子节目指南(EPG)、数字视频广播手持(DVB-H)的电子服务指南(ESG)等等的形式而存在。广播接收模块111可以通过使用多种类型的广播系统接收信号广播。特别地，广播接收模块111可以通过使用诸如多媒体广播-地面(DMB-T)、数字多媒体广播-卫星(DMB-S)、数字视频广播-手持(DVB-H)，前向链路媒体(MediaFLO@)的数据广播系统、地面数字广播综合服务(ISDB-T)等等的数字广播系统接收数字广播。广播接收模块111可以被构造为适合提供广播信号的广播系统以及上述数字广播系统。经由广播接收模块111接收的广播信号和/或广播相关信息可以存储在存储器160(或者其它类型的存储介质)中。
移动通信模块112将无线电信号发送到基站(例如，接入点、节点B等等)、外部终端以及服务器中的至少一个和/或从其接收无线电信号。这样的无线电信号可以包括语音通话信号、视频通话信号、或者根据文本和/或多媒体消息 发送和/或接收的多种类型的数据。
无线互联网模块113支持移动终端的无线互联网接入。该模块可以内部或外部地耦接到终端。该模块所涉及的无线互联网接入技术可以包括WLAN(无线LAN)(Wi-Fi)、Wibro(无线宽带)、Wimax(全球微波互联接入)、HSDPA(高速下行链路分组接入)等等。
短程通信模块114是设置为支持短程通信。短程通信技术的一些示例包括蓝牙TM、射频识别(RFID)、红外数据协会(IrDA)、超宽带(UWB)、紫蜂TM等等。
A/V输入单元120设置为接收音频或视频信号。A/V输入单元120可以包括相机121和麦克风122，相机121对在视频捕获模式或图像捕获模式中由图像捕获装置获得的静态图片或视频的图像数据进行处理。处理后的图像帧可以显示在显示单元151上。经相机121处理后的图像帧可以存储在存储器160(或其它存储介质)中或者经由无线通信单元110进行发送，可以根据移动终端的构造提供两个或更多相机121。麦克风122可以在电话通话模式、记录模式、语音识别模式等等运行模式中经由麦克风接收声音(音频数据)，并且能够将这样的声音处理为音频数据。处理后的音频(语音)数据可以在电话通话模式的情况下转换为可经由移动通信模块112发送到移动通信基站的格式输出。麦克风122可以通过噪声消除(或抑制)算法以消除(或抑制)在接收和发送音频信号的过程中产生的噪声或者干扰。
感测单元140检测移动终端100的当前状态，(例如，移动终端100的打开或关闭状态)、移动终端100的位置、用户对于移动终端100的接触(即，触摸输入)的有无、移动终端100的取向、移动终端100的加速或减速移动和方向等等，并且生成用于控制移动终端100的操作的命令或信号。例如，当移动终端100实施为滑动型移动电话时，感测单元140可以感测该滑动型电话是打开还是关闭。另外，感测单元140能够检测电源单元190是否提供电力或者接口单元170是否与外部装置耦接。
接口单元170用作至少一个外部装置与移动终端100连接可以通过的接口。例如，外部装置可以包括有线或无线头戴式耳机端口、外部电源(或电池充电器)端口、有线或无线数据端口、存储卡端口、用于连接具有识别模块的装置 的端口、音频输入/输出(I/O)端口、视频I/O端口、耳机端口等等。识别模块可以是存储用于验证用户使用移动终端100的多种信息并且可以包括用户识别模块(UIM)、客户识别模块(SIM)、通用客户识别模块(USIM)等等。另外，具有识别模块的装置(下面称为"识别装置")可以采取智能卡的形式，因此，识别装置可以经由端口或其它连接装置与移动终端100连接。接口单元170可以设置为接收来自外部装置的输入(例如，数据信息、电力等等)并且将接收到的输入传输到移动终端100内的一个或多个元件或者可以设置为在移动终端和外部装置之间传输数据。
另外，当移动终端100与外部底座连接时，接口单元170可以用作允许通过其将电力从底座提供到移动终端100的路径或者可以用作允许从底座输入的多种命令信号通过其传输到移动终端的路径。从底座输入的多种命令信号或电力可以用作用于识别移动终端是否准确地安装在底座上的信号。输出单元150被构造为以视觉、音频和/或触觉方式提供输出信号(例如，音频信号、视频信号、警报信号、振动信号等等)。输出单元150可以包括音频输出模块152、警报单元153等等。
音频输出模块152可以在移动终端处于呼叫信号接收模式、通话模式、记录模式、语音识别模式、广播接收模式等等模式下时，将无线通信单元110接收的或者在存储器160中存储的音频数据转换音频信号并且输出为声音。而且，音频输出模块152可以提供与移动终端100执行的特定功能相关的音频输出(例如，呼叫信号接收声音、消息接收声音等等)。音频输出模块152可以包括扬声器、蜂鸣器等等。
警报单元153可以提供输出以将事件的发生通知给移动终端100。典型的事件可以包括呼叫接收、消息接收、键信号输入、触摸输入等等。除了音频或视频输出之外，警报单元153可以以不同的方式提供输出以通知事件的发生。例如，警报单元153可以以振动的形式提供输出，当接收到呼叫、消息或一些其它进入通信(incomingcommunication)时，警报单元153可以提供触觉输出(即，振动)以将其通知给用户。通过提供这样的触觉输出，即使在用户的移动电话处于用户的口袋中时，用户也能够识别出事件的发生。警报单元153也可以经由音频输出模块152提供通知事件的发生的输出。
存储器160可以存储由控制器180执行的处理和控制操作的软件程序等等，或者可以暂时地存储己经输出或将要输出的数据(例如，电话簿、消息、静态图像、视频等等)。而且，存储器160可以存储关于当触摸施加到触摸屏时输出的多种方式的振动和音频信号的数据。
存储器160可以包括至少一种类型的存储介质，所述存储介质包括闪存、硬盘、多媒体卡、卡型存储器(例如，SD或DX存储器等等)、随机访问存储器(RAM)、静态随机访问存储器(SRAM)、只读存储器(ROM)、电可擦除可编程只读存储器(EEPROM)、可编程只读存储器(PROM)、磁性存储器、磁盘、光盘等等。而且，移动终端100可以与通过网络连接执行存储器160的存储功能的网络存储装置协作。
控制器180通常控制移动终端的总体操作。例如，控制器180执行与语音通话、数据通信、视频通话等等相关的控制和处理。另外，控制器180可以包括用于再现(或回放)多媒体数据的多媒体模块181，多媒体模块181可以构造在控制器180内，或者可以构造为与控制器180分离。控制器180可以执行模式识别处理，以将在触摸屏上执行的手写输入或者图片绘制输入识别为字符或图像。
电源单元190在控制器180的控制下接收外部电力或内部电力并且提供操作每个元件和组件所需的适当的电力。
这里描述的实施方式可以以使用例如计算机软件、硬件或其任何组合的计算机可读介质来实施。对于硬件实施，这里描述的实施方式可以通过使用特定用途集成电路(ASIC)、数字信号处理器(DSP)、数字信号处理装置(DSPD)、可编程逻辑装置(PLD)、现场可编程门阵列(FPGA)、处理器、控制器、微控制器、微处理器、被设计为执行这里描述的功能的电子单元中的至少一种来实施，在一些情况下，这样的实施方式可以在控制器180中实施。对于软件实施，诸如过程或功能的实施方式可以与允许执行至少一种功能或操作的单独的软件模块来实施。软件代码可以由以任何适当的编程语言编写的软件应用程序(或程序)来实施，软件代码可以存储在存储器160中并且由控制器180执行。
至此，己经按照其功能描述了移动终端。下面，为了简要起见，将描述 诸如折叠型、直板型、摆动型、滑动型移动终端等等的多种类型的移动终端中的滑动型移动终端作为示例。因此，本发明实施例能够应用于任何类型的移动终端，并且不限于滑动型移动终端。
如图1中所示的移动终端100可以被构造为利用经由帧或分组发送数据的诸如有线和无线通信系统以及基于卫星的通信系统来操作。
现在将参考图2描述其中根据本发明实施例的移动终端能够操作的通信系统。
这样的通信系统可以使用不同的空中接口和/或物理层。例如，由通信系统使用的空中接口包括例如频分多址(FDMA)、时分多址(TDMA)、码分多址(CDMA)和通用移动通信系统(UMTS)(特别地，长期演进(LTE))、全球移动通信系统(GSM)等等。作为非限制性示例，下面的描述涉及CDMA通信系统，但是这样的教导同样适用于其它类型的系统。
参考图2，CDMA无线通信系统可以包括多个移动终端100、多个基站(BS)270、基站控制器(BSC)275和移动交换中心(MSC)280。MSC280被构造为与公共电话交换网络(PSTN)290形成接口。MSC280还被构造为与可以经由回程线路耦接到基站270的BSC275形成接口。回程线路可以根据多个己知的接口中的任一种来构造，所述接口包括例如E1/T1、ATM，IP、PPP、帧中继、HDSL、ADSL或xDSL。将理解的是，如图2中所示的系统可以包括多个BSC275。
每个BS270可以服务一个或多个分区(或区域)，由多向天线或指向特定方向的天线覆盖的每个分区放射状地远离BS270。或者，每个分区可以由用于分集接收的两个或更多天线覆盖。每个BS270可以被构造为支持多个频率分配，并且每个频率分配具有特定频谱(例如，1.25MHz,5MHz等等)。
分区与频率分配的交叉可以被称为CDMA信道。BS270也可以被称为基站收发器子系统(BTS)或者其它等效术语。在这样的情况下，术语"基站"可以用于笼统地表示单个BSC275和至少一个BS270。基站也可以被称为"蜂窝站"。或者，特定BS270的多个分区可以被称为多个蜂窝站。
如图2中所示，广播发射器(BT)295将广播信号发送给在系统内操作的移动终端100。如图1中所示的广播接收模块111被设置在移动终端100处以接收由BT295发送的广播信号。在图2中，示出了几个全球定位系统(GPS)卫星300。 卫星300帮助定位多个移动终端100中的至少一个。
在图2中，描绘了多个卫星300，但是理解的是，可以利用任何数目的卫星获得有用的定位信息。如图1中所示的GPS模块115通常被构造为与卫星300配合以获得想要的定位信息。替代GPS跟踪技术或者在GPS跟踪技术之外，可以使用可以跟踪移动终端的位置的其它技术。另外，至少一个GPS卫星300可以选择性地或者额外地处理卫星DMB传输。
作为无线通信系统的一个典型操作，BS270接收来自移动终端100的反向链路信号。移动终端100通常参与通话、消息收发和其它类型的通信。特定基站270接收的每个反向链路信号被在特定BS270内进行处理。获得的数据被转发给相关的BSC275。BSC提供通话资源分配和包括BS270之间的软切换过程的协调的移动管理功能。BSC275还将接收到的数据路由到MSC280，其提供用于与PSTN290形成接口的额外的路由服务。类似地，PSTN290与MSC280形成接口，MSC与BSC275形成接口，并且BSC275相应地控制BS270以将正向链路信号发送到移动终端100。
基于上述移动终端硬件结构以及通信系统，提出本发明方法实施例。
实施例一
如图3所示，本发明第一实施例提出一种天线调谐方法，所述方法包括步骤：
S10、接收放大器输出的信号，并通过调谐网络对所述信号进行初次调谐；
S20、判断初次调谐信号的驻波比是否大于预设的阈值，若是，执行步骤S30，若否，执行步骤S31；
S30、逐步驱动调谐网络，获得更佳的匹配调谐网络参数，执行步骤S40；
S31、将所述信号直接从天线发射出去；
S40、通过所述更佳的匹配调谐网络参数对所述初次调谐信号进行再次调谐，并从天线发射出去。
在本实施例中，通过智能检测驻波并对调谐网络进行匹配至更佳，使得 驻波比更小，通过天线辐射出去的能量更多。
在本实施例中，待发送的信号首先通过放大器PA进行放大之后经调谐网络从天线发射出去，在本发明实施例中，在放大器与调谐网络之后加入双向耦合器，以一定衰减比例耦合反射功率信号和入射功率信号的大小，耦合进来的信号为交流信号，通过检波之后可以进行直流采集，检波之后通过低通滤波器LPF进行滤波，以剔除其他高频杂波，直流信号从直流采集模块AD进入CPU运算单元，CPU运算单元通过模数转换器识别到模拟电压，在本实施例中，所述检波电路包括第一检波电路和第二检波电路，第一检波电路设置为接收反射功率耦合信号，第二检波电路设置为接收入射功率耦合信号，所述第一检波电路之后连接第一低通滤波器，所述第一低通滤波器之后连接第一直流采集模块，所述第一直流采集模块将反射功率耦合信号的反射电压值发送至CPU运算单元；所述第二检波电路之后连接第二低通滤波器，所述第二低通滤波器之后连接第二直流采集模块，所述第二直流采集模块将入射功率耦合信号的入射电压值发送至CPU运算单元；CPU运算单元计算反射电压值与入射电压值的比值为反射系数
Figure PCTCN2016113747-appb-000005
利用公式
Figure PCTCN2016113747-appb-000006
求得驻波比VSWR，此时，判断驻波比是否大于预设的阈值，若驻波比大于预设的阈值，则逐步驱动调谐网络，获得更佳的匹配调谐网络参数；若驻波比小于等于预设的阈值，则将所述信号直接从天线发射出去；在理想状态下，驻波比为1时表示所述信号完全通过天线发射出去，没有反射回来的能量，这只是一种理想状态，而本实施例中的预设的阈值可以是一个比1稍微大一些的数值，例如是2，由调谐效率决定，可以预设在天线收发电路中，也可以通过手动设定。
在本实施例中，调谐网络主要由电容框架与电感框架构成，匹配调谐网络参数包括电感参数和电容参数，通过调整电感与电容的参数，可以达到更佳的匹配状态。
如图4所示，为本发明应用实例的调谐网络组成示意图，该调谐网络由电感和电容构成，电容的调谐采用电容调谐器方案，当改变电容的控制电压时，可改变电容的电容值；而电感的调谐采用控制开关的断开与闭合，当相应的开关闭合的时候相当于较少了电感值，反之当断开开关时相当于增大了电路中的感抗，从而可以改变电感的电感值。当改变电容与电感达到驻波比VSWR小于等于预设的阈值，例如小于等于2时，即可认为调谐网络达到较 佳状态，停止调谐。
smith圆图是用来分析传输线匹配问题的有效方法之一，根据smith圆图负载阻抗的移动特性可对电感或电容进行逐步控制。如图5所示，当并联电感电容时频点围绕着电导圆规律移动；当串联电感电容时，频点围绕着电阻圆规律移动。当在某个位置下检测出驻波比VSWR小于等于预设的阈值时即停止移动，认为发射达到较佳状态。
需要说明的是，图4所示的本发明应用实例的调谐网络仅为示例，本发明实施例不限于此，调谐网络可以采用多种电容和电感组合形式。
实施例二
如图6所示，在本实施例中，所示步骤S20包括：
S21、实时或者定时对初次调谐信号进行驻波检测；
S22、通过CPU运算单元计算所述驻波的驻波比；
S23、将所述驻波比与预设的阈值进行比较。
在本实施例中，所述通过CPU运算单元计算所述驻波的驻波比包括：
通过双向耦合器从所述初次调谐信号中耦合得到反射功率耦合信号和入射功率耦合信号；
通过依次连接的第一检波电路、第一低通滤波器和第一直流采集模块采集反射功率耦合信号的反射电压值；通过依次连接的第二检波电路、第二低通滤波器和第二直流采集模块采集入射功率耦合信号的入射电压值；
通过CPU运算单元计算反射电压值与入射电压值的比值为反射系数
Figure PCTCN2016113747-appb-000007
利用公式
Figure PCTCN2016113747-appb-000008
求得驻波比VSWR。
实施例三
如图7所示，本发明实施例提供一种天线调谐电路，包括：
放大器PA，设置为将输入信号放大并输出到调谐网络调谐成初次调谐信号；
检测电路，设置为判断所述初次调谐信号的驻波比是否大于预设的阈值；若是，则逐步驱动调谐网络，获得更佳的匹配调谐网络参数；
调谐网络，设置为对所述放大器输出的信号进行初次调谐，并通过所述更佳的匹配调谐网络参数对所述初次调谐信号进行再次调谐。
在本实施例中，所述检测电路包括：双向耦合器，依次连接的第一检波电路、第一低通滤波器LPF1和第一直流采集模块AD1，依次连接的第二检波电路、第二低通滤波器LPF2和第二直流采集模块AD2，以及CPU运算单元；
其中，所述双向耦合器，设置为从所述初次调谐信号中耦合得到反射功率耦合信号和入射功率耦合信号；
所述第一检波电路设置为将反射功率耦合信号从交流信号转换为直流信号；
所述第一低通滤波器设置为滤除所述反射功率耦合信号的高频杂波；
所述第一直流采集模块设置为将所述反射功率耦合信号从模拟值转换成数字值，作为反射电压值；所述第二检波电路设置为将入射功率耦合信号从交流信号转换为直流信号；
所述第二低通滤波器设置为滤除所述入射功率耦合信号的高频杂波；
所述第二直流采集模块设置为将所述入射功率耦合信号从模拟值转换成数字值，作为入射电压值；
CPU运算单元设置为通过所述反射电压值与入射电压值计算反射系数和驻波比。
在本实施例中，所述CPU运算单元设置为：
计算反射电压值与入射电压值的比值为反射系数
Figure PCTCN2016113747-appb-000009
利用公式
Figure PCTCN2016113747-appb-000010
求得驻波比VSWR。
在本实施例中，所述调谐网络包括电容框架和电感框架。
在本实施例中，所述检测电路设置为逐步驱动调谐网络，当调整后的调谐网络对信号调谐的驻波比小于等于所述预设的阈值时，停止调整所述调谐网络。
在本实施例中，所述检测电路设置为通过调整电容的控制电压改变所述电容的电容值，通过控制开关的断开和闭合改变所述电感的电感值，以调整所述调谐网络。
在本实施例中，所述检测电路设置为根据smith圆图负载阻抗的移动特性对所述电感或电容进行逐步调整，获得更佳的匹配调谐网络参数。
实施例四
如图8所示，本发明实施例进一步提供一种天线调谐装置，包括：
接收模块10，设置为接收放大器输出的信号，并将所述信号发送至调谐网络；
判断模块20，设置为判断初次调谐信号的驻波比是否大于预设的阈值；
匹配模块30，设置为当驻波比大于预设的阈值时，逐步驱动调谐网络，获得更佳的匹配调谐网络参数；
调谐模块40，设置为对所述放大器输出的信号进行初次调谐得到初次调谐信号，并通过所述更佳的匹配调谐网络参数对所述初次调谐信号进行再次调谐。
如图9所示，在本实施例中，所述判断模块20包括：
驻波检测单元21，设置为实时或者定时对所述初次调谐信号进行驻波检测；
计算单元22，设置为通过CPU运算单元计算所述驻波的驻波比；
比较单元23，设置为将所述驻波比与预设的阈值进行比较。
在本实施例中，通过智能检测驻波并对调谐网络进行匹配至更佳，使得驻波比更小，通过天线辐射出去的能量更多。
在本实施例中，所述匹配模块设置为逐步驱动调谐网络，当调整后的调谐网络对信号调谐的驻波比小于等于所述预设的阈值时，停止调整所述调谐网络。
在本实施例中，所述匹配模块设置为通过调整电容的控制电压改变所述电容的电容值，通过控制开关的断开和闭合改变所述电感的电感值，以调整 所述调谐网络。
在本实施例中，所述匹配模块设置为根据smith圆图负载阻抗的移动特性对所述电感或电容进行逐步调整，获得更佳的匹配调谐网络参数。
本发明实施例还提出一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令被处理器执行时实现上述天线调谐方法。
在本文中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者装置不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者装置所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者装置中还存在另外的相同要素。
上述本发明实施例序号仅仅为了描述，不代表实施例的优劣。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到上述实施例方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本申请的技术方案可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中，包括多个指令用以使得一台终端设备(可以是手机，计算机，服务器，空调器，或者网络设备等)执行本发明实施例所述的方法。
以上仅为本发明的实施例，并非因此限制本申请的专利范围，凡是利用本申请说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本申请的专利保护范围内。
工业实用性
本发明实施例通过智能检测驻波并对调谐网络进行匹配至较佳，使得驻波比更小，通过天线辐射出去的能量更多。

Claims (20)

  1. 一种天线调谐方法，所述方法包括：
    接收放大器输出的信号，并通过调谐网络对所述信号进行初次调谐；
    判断初次调谐信号的驻波比是否大于预设的阈值；
    若是，则逐步驱动调谐网络，获得更佳的匹配调谐网络参数；
    通过所述更佳的匹配调谐网络参数对所述初次调谐信号进行再次调谐，并从天线发射出去。
  2. 根据权利要求1所述的天线调谐方法，其中，所述判断初次调谐信号的驻波比是否大于预设的阈值包括：
    实时或者定时对初次调谐信号进行驻波检测；
    通过中央处理器CPU运算单元计算所述驻波的驻波比；
    将所述驻波比与预设的阈值进行比较。
  3. 根据权利要求2所述的天线调谐方法，其中，所述通过CPU运算单元计算所述驻波的驻波比包括：
    通过双向耦合器从所述初次调谐信号中耦合得到反射功率耦合信号和入射功率耦合信号；
    通过依次连接的第一检波电路、第一低通滤波器和第一直流采集模块采集反射功率耦合信号的反射电压值；通过依次连接的第二检波电路、第二低通滤波器和第二直流采集模块采集入射功率耦合信号的入射电压值；
    通过CPU运算单元计算反射电压值与入射电压值的比值为反射系数
    Figure PCTCN2016113747-appb-100001
    利用公式
    Figure PCTCN2016113747-appb-100002
    求得驻波比VSWR。
  4. 根据权利要求2所述的天线调谐方法，其中，所述调谐网络包括电容框架和电感框架。
  5. 根据权利要求1所述的天线调谐方法，其中，
    所述逐步驱动调谐网络，获得更佳的匹配调谐网络参数的步骤中，逐步驱动调谐网络，当调整后的调谐网络对信号调谐的驻波比小于等于所述预设的阈值时，停止调整所述调谐网络。
  6. 根据权利要求4所述的天线调谐方法，其中，
    所述匹配调谐网络参数包括电感参数和电容参数。
  7. 根据权利要求4所述的天线调谐方法，其中，所述逐步驱动调谐网络，获得更佳的匹配调谐网络参数的步骤中，
    通过调整电容的控制电压改变所述电容的电容值，通过控制开关的断开和闭合改变所述电感的电感值，以调整所述调谐网络。
  8. 根据权利要求7所述的天线调谐方法，其中，所述逐步驱动调谐网络，获得更佳的匹配调谐网络参数包括：
    根据史密斯smith圆图负载阻抗的移动特性对所述电感或电容进行逐步调整，获得更佳的匹配调谐网络参数。
  9. 一种天线调谐电路，包括：
    放大器，设置为将输入信号放大并输出到调谐网络调谐成初次调谐信号；
    检测电路，设置为判断所述初次调谐信号的驻波比是否大于预设的阈值；若是，则逐步驱动调谐网络，获得更佳的匹配调谐网络参数；
    调谐网络，设置为对所述放大器输出的信号进行初次调谐，并通过所述更佳的匹配调谐网络参数对所述初次调谐信号进行再次调谐。
  10. 根据权利要求5所述的天线调谐电路，其中，所述检测电路包括：双向耦合器，依次连接的第一检波电路、第一低通滤波器和第一直流采集模块，依次连接的第二检波电路、第二低通滤波器和第二直流采集模块，以及CPU运算单元；
    其中，所述双向耦合器，设置为从所述初次调谐信号中耦合得到反射功率耦合信号和入射功率耦合信号；
    所述第一检波电路设置为将反射功率耦合信号从交流信号转换为直流信号；
    所述第一低通滤波器设置为滤除所述反射功率耦合信号的高频杂波；
    所述第一直流采集模块设置为将所述反射功率耦合信号从模拟值转换成数字值，作为反射电压值；
    所述第二检波电路设置为将入射功率耦合信号从交流信号转换为直流信 号；
    所述第二低通滤波器设置为滤除所述入射功率耦合信号的高频杂波；
    所述第二直流采集模块设置为将所述入射功率耦合信号从模拟值转换成数字值，作为入射电压值；
    CPU运算单元设置为通过所述反射电压值与入射电压值计算反射系数和驻波比。
  11. 根据权利要求10所述的天线调谐电路，其中，所述CPU运算单元设置为：
    计算反射电压值与入射电压值的比值为反射系数
    Figure PCTCN2016113747-appb-100003
    利用公式
    Figure PCTCN2016113747-appb-100004
    求得驻波比VSWR。
  12. 根据权利要求9所述的天线调谐电路，其中，所述调谐网络包括电容框架和电感框架。
  13. 根据权利要求9所述的天线调谐电路，其中，
    所述检测电路设置为逐步驱动调谐网络，当调整后的调谐网络对信号调谐的驻波比小于等于所述预设的阈值时，停止调整所述调谐网络。
  14. 根据权利要求12所述的天线调谐电路，其中，
    所述检测电路设置为通过调整电容的控制电压改变所述电容的电容值，通过控制开关的断开和闭合改变所述电感的电感值，以调整所述调谐网络。
  15. 根据权利要求14所述的天线调谐电路，其中，
    所述检测电路设置为根据smith圆图负载阻抗的移动特性对所述电感或电容进行逐步调整，获得更佳的匹配调谐网络参数。
  16. 一种天线调谐装置，包括：
    接收模块，设置为接收放大器输出的信号，并将所述信号发送至调谐网络；
    判断模块，设置为判断初次调谐信号的驻波比是否大于预设的阈值；
    匹配模块，设置为当驻波比大于预设的阈值时，逐步驱动调谐网络，获得更佳的匹配调谐网络参数；
    调谐模块，设置为对所述放大器输出的信号进行初次调谐得到初次调谐信号，并通过所述更佳的匹配调谐网络参数对所述初次调谐信号进行再次调谐。
  17. 根据权利要求16所述的天线调谐装置，所述判断模块包括：
    驻波检测单元，设置为实时或者定时对所述初次调谐信号进行驻波检测；
    计算单元，设置为通过CPU运算单元计算所述驻波的驻波比；
    比较单元，设置为将所述驻波比与预设的阈值进行比较。
  18. 根据权利要求16所述的天线调谐装置，其中，
    所述匹配模块设置为逐步驱动调谐网络，当调整后的调谐网络对信号调谐的驻波比小于等于所述预设的阈值时，停止调整所述调谐网络。
  19. 根据权利要求16所述的天线调谐装置，其中，
    所述匹配模块设置为通过调整电容的控制电压改变所述电容的电容值，通过控制开关的断开和闭合改变所述电感的电感值，以调整所述调谐网络。
  20. 一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令被处理器执行时实现如权利要求1～8中任意一项所述的天线调谐方法。
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