WO2018133332A1 - 多系统接入平台电压驻波比检测方法和装置 - Google Patents

多系统接入平台电压驻波比检测方法和装置 Download PDF

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Publication number
WO2018133332A1
WO2018133332A1 PCT/CN2017/091044 CN2017091044W WO2018133332A1 WO 2018133332 A1 WO2018133332 A1 WO 2018133332A1 CN 2017091044 W CN2017091044 W CN 2017091044W WO 2018133332 A1 WO2018133332 A1 WO 2018133332A1
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Prior art keywords
signal
power value
standing wave
wave ratio
reverse
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PCT/CN2017/091044
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English (en)
French (fr)
Inventor
李勇军
吴四维
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深圳国人通信股份有限公司
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Publication of WO2018133332A1 publication Critical patent/WO2018133332A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details 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
    • H04B1/005Details 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
    • H04B1/0053Details 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
    • H04B1/006Details 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
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/04Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant in circuits having distributed constants, e.g. having very long conductors or involving high frequencies
    • G01R27/06Measuring reflection coefficients; Measuring standing-wave ratio
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details 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
    • H04B1/0003Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
    • H04B1/0007Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at radiofrequency or intermediate frequency stage
    • H04B1/0017Digital filtering
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details 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
    • H04B1/02Transmitters
    • H04B1/04Circuits
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details 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
    • H04B1/06Receivers
    • H04B1/10Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/12Neutralising, balancing, or compensation arrangements
    • H04B1/123Neutralising, balancing, or compensation arrangements using adaptive balancing or compensation means
    • H04B1/126Neutralising, balancing, or compensation arrangements using adaptive balancing or compensation means having multiple inputs, e.g. auxiliary antenna for receiving interfering signal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details 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
    • H04B1/02Transmitters
    • H04B1/04Circuits
    • H04B2001/0408Circuits with power amplifiers
    • H04B2001/0416Circuits with power amplifiers having gain or transmission power control

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a broadband antenna segmentation voltage standing wave ratio detecting method and apparatus for a multi-system access platform.
  • the technology can meet the requirements of the total voltage standing wave ratio detection of the antenna, but there is no device for detecting the voltage standing wave ratio state of each frequency band of the broadband antenna, and the same coupler and other RF devices have larger in different frequency bands and different temperatures. Differences are difficult to detect accurately.
  • the object of the present invention is to overcome the deficiencies of the foregoing technologies, and to provide a method and apparatus for detecting a voltage standing wave ratio of a multi-system access platform, which solves the requirement of the broadband segment voltage standing wave ratio detection existing in the current POI system.
  • a first aspect of the present invention provides a multi-system access platform voltage standing wave ratio detecting method, including the following steps:
  • S6 performing amplification filtering on the voltage signal
  • S7 performing analog-to-digital conversion processing on the amplified and filtered voltage signal, and converting the voltage signal into a digitized voltage signal
  • the method further includes the following steps: performing radio frequency amplification on the narrowband frequency band signal.
  • the method further includes the steps of: detecting an ambient temperature inside the device, and performing power value compensation on the forward power value according to the detected temperature and the preset temperature compensation number.
  • the polling is performed at a certain inter-cycle interval.
  • a second aspect of the present invention provides a multi-system access platform voltage standing wave ratio detecting apparatus, including: [0019] a wideband coupling circuit for coupling a wideband signal and outputting a forward sum of a plurality of frequency bands to be tested Reverse coupled signal;
  • an RF filter circuit configured to perform band pass filtering processing on the forward coupled signal or the reverse coupled signal input by the input RF switch to obtain a corresponding narrowband frequency band signal
  • a power detection circuit configured to detect the narrowband frequency band signal to form a voltage signal
  • an operational amplifier circuit configured to perform amplification filtering on the voltage signal
  • an analog-to-digital conversion circuit configured to perform analog-to-digital conversion processing on the amplified and filtered voltage signal, and convert the voltage signal into a digitized voltage signal;
  • comparing the digitized voltage signal with a power meter of a corresponding preset narrowband frequency band signal Calculating a forward power value or a reverse power value for calculating a voltage standing wave ratio according to the forward power value and the reverse power value, for polling the forward coupled signal and the reverse coupled signal of each frequency band to be tested Corresponding voltage standing wave ratio.
  • the method further includes a radio frequency amplifying circuit, configured to perform radio frequency amplification on the narrowband band signal outputted by the output radio frequency switch, and output the signal to the power detecting circuit.
  • a radio frequency amplifying circuit configured to perform radio frequency amplification on the narrowband band signal outputted by the output radio frequency switch, and output the signal to the power detecting circuit.
  • a temperature sensor is further configured to detect an ambient temperature inside the device, and send the detected temperature value to the single chip, and the single chip is used to obtain the pair according to the detected temperature value and the preset temperature compensation number.
  • the forward power value or the reverse power value is used for power value compensation.
  • the wideband coupling circuit is a two-channel broadband suspension coupling circuit having two pairs of forward and reverse coupled output ports, respectively.
  • the input RF switch combination includes an SP4T radio frequency switch and an SP8T radio frequency switch connected to an SP4T radio frequency switch output, and the output radio frequency switch is combined into an SP8T radio frequency switch.
  • the present invention selects a forward or reverse coupled signal of one of the to-be-tested frequency bands by inputting a radio frequency switching combination and an output radio frequency switching combination as a signal channel selection, and processes the corresponding narrow band by the RF filter circuit.
  • the frequency band signal after the RF amplification, power detection, amplification filtering, analog-to-digital conversion of the narrow-band frequency band signal, the forward power value or the reverse power value is calculated by comparing the power meter of the single-chip microcomputer with the preset narrow-band frequency band signal, and then Calculating the voltage standing wave ratio from the power value and the reverse power value, and then polling the forward and reverse coupled signals of each frequency band to be tested by the single chip microcomputer to obtain the corresponding voltage standing wave ratio, thereby realizing the broadband antenna segment voltage standing wave Compared with the detection, the detection accuracy is high, the integration is high, the reliability is high, and the cost is low.
  • FIG. 1 is a schematic block diagram of a multi-system access platform voltage standing wave ratio detecting device according to the present invention
  • 2 is a schematic diagram of a voltage standing wave ratio detecting device of the multi-system access platform shown in FIG. 1;
  • FIG. 3 is a schematic structural diagram of an input RF switching combination of the voltage standing wave ratio detecting device of the multi-system access platform shown in FIG. 1;
  • FIG. 4 is a schematic structural diagram of an output RF switching combination of the voltage standing wave ratio detecting device of the multi-system access platform shown in FIG. 1;
  • FIG. 5 is a schematic structural view of a radio frequency filter circuit of the voltage standing wave ratio detecting device of the multi-system access platform shown in FIG. 1;
  • FIG. 6 is a schematic flow chart of a method for detecting a voltage standing wave ratio of a multi-system access platform according to the present invention.
  • the present invention provides a multi-system access platform voltage standing wave ratio detecting device, including a wideband coupling circuit 11, an input RF switch combination 12, a RF filter circuit 16, and an output RF switch.
  • the combination 26 the radio frequency amplifying circuit 27, the power detecting circuit 30, the operational amplifying circuit 31, the analog to digital converting circuit 32, the single chip microcomputer 33, the temperature sensor 35, and the memory 34.
  • the broadband coupling circuit 11 is connected to one end of the input RF switch combination 12, the other end of the input RF switch combination 12 is connected to one end of the RF filter circuit 16, and the other end of the RF filter circuit 16 is connected to one end of the output RF switch combination 26,
  • the other end of the output RF switch combination 26 is connected to the input terminal of the RF amplifying circuit 27, the output of the RF amplifying circuit 27 is connected to one end of the power detecting circuit 30, and the other end of the power detecting circuit 30 is connected to the analog to digital converting circuit 32.
  • the other end of the analog-to-digital conversion circuit 32 is connected to the single chip microcomputer 33.
  • the memory 34, the temperature sensor 35, the input RF switch combination 12, and the output RF switch combination 26 are respectively connected to the single chip microcomputer 33.
  • the wideband coupling circuit 11 is for coupling a wideband signal and outputting forward and reverse coupled signals of a plurality of frequency bands to be tested.
  • the input RF switch combination 12 is used to gate a forward coupled signal or a reverse coupled signal of one of the frequency bands to be tested for output.
  • the RF filter circuit 16 is configured to perform band pass filtering processing on the forward coupled signal or the reverse coupled signal input to the RF switch 12 to suppress the out-of-band signal to obtain a corresponding narrow-band frequency band signal, and the narrow-band frequency band signal is subjected to the detection segmentation requirement.
  • Presets include bands not limited to 2G GSM, CDMA, DCS, PHS, 3G CDMA2000, WCDMA, TD-SCDMA and 4G TD-LTE, FDD-LTE.
  • the output RF switch combination 26 is used to gate the narrowband band signal for output.
  • RF amplification The circuit 27 is configured to perform RF amplification on the narrowband band signal output from the output RF switch combination 26, and output to the power detection circuit 30.
  • the RF amplification circuit 27 is a wideband gain amplifier for compensating for loss of the RF link.
  • the power detection circuit 30 is configured to detect a narrowband band signal to form a voltage signal, and the power detector circuit 30 is an average detector.
  • the operational amplifier circuit 31 is for amplifying and filtering the voltage signal, and the operational amplifier circuit 31 is a non-inverting amplifier circuit.
  • the analog-to-digital conversion circuit 32 is configured to perform analog-to-digital conversion processing on the amplified and filtered voltage signal to convert the voltage signal into a digitized voltage signal, and the analog-to-digital conversion circuit 32 is a 12-bit analog-to-digital converter that converts the analog signal into a digital signal. signal.
  • the temperature sensor 35 is for detecting the ambient temperature inside the device, and sends the detected temperature value to the single chip microcomputer 33, which is a linear temperature detector.
  • the single chip microcomputer 35 is configured to control the signal channel strobe of the input RF switch combination 12 and the output RF switch combination 226, and compare and calculate the digitized voltage signal with the power meter of the corresponding preset narrowband frequency band signal. Performing power value compensation for the forward power value or the reverse power value according to the detected power value or the reverse power value, for the forward power value or the reverse power value according to the detected temperature value and the reverse power value, for using the forward power value and the reverse power The value calculation results in a voltage standing wave ratio, a forward coupled signal and a reverse coupled signal for polling each of the to-be-tested frequency bands to obtain a corresponding voltage standing wave ratio, wherein the preset temperature compensation number is statistical data obtained through batch experiments.
  • the memory 34 is used to store a power meter of the preset narrowband band signal, a forward power value, a reverse power value, a voltage standing wave ratio calculated from the forward power value and the reverse power value, and a preset temperature compensation number.
  • the wideband coupling circuit 11 is a two-channel broadband suspension coupling circuit, and has two pairs of forward and reverse coupled output ports respectively, which satisfies the requirements of the wideband antenna segment voltage standing wave ratio detection.
  • the input RF switch combination 12 includes an SP4T RF switch 12a and an SP8T RF switch 12b connected to the output of the SP4T RF switch 12a.
  • the SP4T RF switch 12a has 4 inputs and an output.
  • the four input terminals are 121 input terminal, 122 input terminal, 123 input terminal and 124 input terminal.
  • the SP8T RF switch 12b has one input terminal and eight output terminals, and the eight output terminals are respectively 125 output terminals and 126 outputs.
  • the output RF switch combination 26 is an SP8T RF switch having one input terminal and eight output terminals, and the eight output terminals are respectively 261 output terminal, 262 output terminal, 263 output terminal, and 264 output. Terminal, 265 output, 266 output, 267 output, 268 output.
  • the RF filter circuit 16 is an RF filter array and is composed of a plurality of RF filters. In this embodiment, the RF filter array is composed of 16 RF filters, which are RF filters a and RF. Filter b, RF set filter c RF filter h.
  • a method for detecting a voltage standing wave ratio of a multi-system access platform includes the following steps:
  • the wideband signal is coupled through the wideband coupling circuit 11, and the forward and reverse coupled signals of the plurality of frequency bands to be tested are output.
  • the forward and reverse coupled signals of the four tested frequency bands are output.
  • the output of the narrowband band signal is output by outputting the RF switch combination 26, for example, the output of the 261 output of the output RF switch combination 26 is turned on.
  • S41 Perform radio frequency amplification on the narrowband frequency band signal by the radio frequency amplifying circuit 27 to compensate for the loss of the radio frequency link.
  • the narrowband frequency band signal is detected by the power detecting circuit 30 to form a voltage signal.
  • S6 the voltage signal is amplified and filtered by the operational amplifier circuit 31.
  • Step S9 The gate of the input RF switch combination 12 is input corresponding to the reverse coupled signal of the forward coupled signal. Then, the 121 input of the SP4T radio frequency switch 12a of the input RF switch combination 12 is turned on, and the 126 output of the SP8T radio frequency switch 12b of the input RF switch combination 12 is turned on. Step S3 to step S8 are repeated to obtain a reverse power value, and the voltage standing wave ratio is calculated by the single chip microcomputer 33 according to the forward power value and the reverse power value.
  • the forward and reverse coupled signals of the second, third, and fourth test bands are polled by the single chip microcomputer 33 to obtain a corresponding voltage standing wave ratio.
  • the polling is performed at a certain inter-cycle interval, the polling inter-turn interval requirement is combined with the input radio-frequency switch 12, the output radio-frequency switch combination 26 is turned off, the power detection circuit 30 is responding to the day, The temperature sensor 35 samples the temperature period and the microcontroller 33 calculates the coincidence between the turns. After polling, the strobed signal channel is turned on, and the strobe signal channel is turned off.
  • the present invention selects a forward or reverse coupled signal of one of the frequency bands to be tested by inputting the RF switch combination 12 and the output RF switch combination 26 as signal path selection, and is processed by the RF filter circuit 16.
  • the corresponding narrowband frequency band signal is subjected to radio frequency amplification, power detection, amplification filtering, and analog-to-digital conversion of the narrowband frequency band signal, and the forward power value or the reverse power value is calculated by comparing the power meter of the single-chip microcomputer 33 with the preset narrowband frequency band signal.
  • the voltage standing wave ratio is calculated by obtaining the forward power value and the reverse power value, and then the forward and reverse coupled signals of the respective frequency bands to be tested are polled by the single chip microcomputer 33 to obtain a corresponding voltage standing wave ratio, thereby realizing the broadband antenna.
  • the detection of the stepped voltage standing wave ratio has high detection precision, high integration, high reliability and low cost.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

本发明涉及一种多系统接入平台电压驻波比检测方法和装置,该方法包括以下步骤:耦合宽带信号;选通其中一个待测频带的前向耦合信号进行输出;对前向耦合信号进行带通滤波处理,得到对应的窄带频带信号;选通窄带频带信号进行输出;对窄带频带信号进行检波形成电压信号;对电压信号进行放大滤波;对放大滤波后的电压信号进行模数转换处理;将数字化的电压信号与预置窄带频带信号的功率表进行对比计算得到前向功率值;选通反向耦合信号进行输出,重复步骤得到反向功率值,根据前向功率值和反向功率值计算得到电压驻波比;轮询下一个待测频带的前向和反向耦合信号得到相应的电压驻波比。本发明可实现宽带天线分段电压驻波比的检测,集成度高,成本低。

Description

发明名称:多系统接入平台电压驻波比检测方法和装置 技术领域
[0001] 本发明涉及无线通信技术领域, 尤其是涉及一种多系统接入平台的宽带天线分 段电压驻波比检测方法和装置。
背景技术
[0002] 目前现代移动通信已经从 2G发展到 4G。 2G、 3G和 4G共存, 各种覆盖系统共建 共存, 宽带天线大量使用, 天线以及馈线的状态检测, 尤其电压驻波比是一个 系统天线匹配良好的重要衡量指标, POI(Point of interface)作为室内覆盖的解决 方案之一, 具有可靠性高、 经济等优势, 为了实吋了解 P0I系统中宽带天线的工 作状态, 在 POI系统中, 要求对天线各个频段的电压驻波比进行检测, 目前一般 技术可以满足天线总的电压驻波比检测要求, 但目前还没有检测宽带天线各频 段的电压驻波比状态的装置, 同吋耦合器和其它射频器件等在不同频段和不同 温度下存在较大差异, 难以进行准确检测。
技术问题
问题的解决方案
技术解决方案
[0003] 本发明的目的在于克服上述技术的不足, 提供一种多系统接入平台电压驻波比 检测方法和装置, 解决目前 POI系统中存在的宽带分段电压驻波比检测的要求。
[0004] 本发明的第一方面提供一种多系统接入平台电压驻波比检测方法, 包括以下步 骤:
[0005] Sl、 耦合宽带信号, 输出多个待测频带的前向和反向耦合信号;
[0006] S2、 选通其中一个所述待测频带的前向耦合信号进行输出;
[0007] S3、 对所述前向耦合信号进行带通滤波处理, 得到对应的窄带频带信号;
[0008] S4、 选通所述窄带频带信号进行输出;
[0009] S5、 对所述窄带频带信号进行检波, 形成电压信号;
[0010] S6、 对所述电压信号进行放大滤波; [0011] S7、 对放大滤波后的所述电压信号进行模数转换处理, 将所述电压信号转化为 数字化的电压信号;
[0012] S8、 将所述数字化的电压信号与预置窄带频带信号的功率表进行对比计算, 得 到前向功率值;
[0013] S9、 选通对应所述前向耦合信号的反向耦合信号进行输出, 重复步骤 S3-步骤 S 8, 得到反向功率值, 根据所述前向功率值和反向功率值, 计算得到电压驻波比
[0014] S10、 轮询下一个待测频带的前向和反向耦合信号, 得到相应的电压驻波比。
[0015] 进一步地, 在所述步骤 S4之后、 步骤 S5之前还包括以下步骤: 对所述窄带频带 信号进行射频放大。
[0016] 进一步地, 在所述步骤 S8之后、 步骤 S9之前还包括以下步骤: 检测装置内部的 环境温度, 根据检测的温度和预置温度补偿数对所述前向功率值进行功率值补 偿。
[0017] 进一步地, 所述步骤 S10中, 轮询按一定吋间周期间隔进行。
[0018] 本发明的第二方面提供一种多系统接入平台电压驻波比检测装置, 包括: [0019] 宽带耦合电路, 用于耦合宽带信号, 并输出多个待测频带的前向和反向耦合信 号;
[0020] 输入射频幵关组合, 用于选通其中一个所述待测频带的前向耦合信号或反向耦 合信号进行输出;
[0021] 射频滤波电路, 用于将所述输入射频幵关输入的前向耦合信号或反向耦合信号 进行带通滤波处理, 得到对应的窄带频带信号;
[0022] 输出射频幵关组合, 用于选通所述窄带频带信号进行输出;
[0023] 功率检波电路, 用于对所述窄带频带信号进行检波, 形成电压信号;
[0024] 运算放大电路, 用于对所述电压信号进行放大滤波;
[0025] 模数转换电路, 用于对放大滤波后的所述电压信号进行模数转换处理, 将所述 电压信号转化为数字化的电压信号;
[0026] 单片机, 用于控制所述输入射频幵关组合和输出射频幵关组合的信号通道选通
, 用于将所述数字化的电压信号与对应的预置窄带频带信号的功率表进行对比 计算得到前向功率值或反向功率值, 用于根据前向功率值和反向功率值计算得 到电压驻波比, 用于轮询各个待测频带的前向耦合信号和反向耦合信号得到相 应的电压驻波比。
[0027] 进一步地, 还包括射频放大电路, 用于对所述输出射频幵关组合输出的窄带频 带信号进行射频放大, 并输出至所述功率检波电路。
[0028] 进一步地, 还包括温度传感器, 用于检测装置内部的环境温度, 并将检测的温 度值发送至所述单片机, 所述单片机用于根据检测的温度值和预置温度补偿数 对得到的前向功率值或反向功率值进行功率值补偿。
[0029] 进一步地, 还包括存储器, 用于存储预置窄带频带信号的功率表、 前向功率值
、 反向功率值、 根据前向功率值和反向功率值计算得到的电压驻波比以及预置 温度补偿数。
[0030] 进一步地, 所述宽带耦合电路为两通道宽带悬带耦合电路, 分别具有两对前向 和反向耦合输出端口。
[0031] 进一步地, 所述输入射频幵关组合包括 SP4T射频幵关以及与 SP4T射频幵关的 输出端连接的 SP8T射频幵关, 所述输出射频幵关组合为一 SP8T射频幵关。 发明的有益效果
有益效果
[0032] 本发明通过输入射频幵关组合和输出射频幵关组合作为信号通道选择幵关, 选 通其中一个待测频带的前向或反向耦合信号, 并通过射频滤波电路处理得到对 应的窄带频带信号, 经射频放大、 功率检波、 放大滤波、 模数转换后的窄带频 带信号, 通过单片机与预置窄带频带信号的功率表对比计算得到前向功率值或 反向功率值, 再对得到前向功率值和反向功率值计算得到电压驻波比, 再通过 单片机轮询各个待测频带的前向和反向耦合信号, 得到相应的电压驻波比, 从 而实现宽带天线分段电压驻波比的检测, 检测精度高, 集成度高, 可靠性高, 成本低。
对附图的简要说明
附图说明
[0033] 图 1为本发明一种多系统接入平台电压驻波比检测装置的原理框图; [0034] 图 2是图 1所示多系统接入平台电压驻波比检测装置的原理图;
[0035] 图 3是图 1所示多系统接入平台电压驻波比检测装置的输入射频幵关组合的结构 示意图;
[0036] 图 4是图 1所示多系统接入平台电压驻波比检测装置的输出射频幵关组合的结构 示意图;
[0037] 图 5是图 1所示多系统接入平台电压驻波比检测装置的射频滤波电路的结构示意 图;
[0038] 图 6为本发明一种多系统接入平台电压驻波比检测方法的流程示意图。
本发明的实施方式
[0039] 下面结合附图和实施例对本发明作进一步的描述。
[0040] 参考图 1和图 2, 本发明提供的一种多系统接入平台电压驻波比检测装置, 包括 宽带耦合电路 11、 输入射频幵关组合 12、 射频滤波电路 16、 输出射频幵关组合 2 6、 射频放大电路 27、 功率检波电路 30、 运算放大电路 31、 模数转换电路 32、 单 片机 33、 温度传感器 35和存储器 34。 宽带耦合电路 11连接输入射频幵关组合 12 的一端, 输入射频幵关组合 12的另一端连接到射频滤波电路 16的一端, 射频滤 波电路 16的另一端连接到输出射频幵关组合 26的一端, 输出射频幵关组合 26的 另一端连接到射频放大电路 27的输入端, 射频放大电路 27的输出端连接到功率 检波电路 30的一端, 功率检波电路 30的另一端连接到模数转换电路 32的一端, 模数转换电路 32的另一端连接到单片机 33, 存储器 34、 温度传感器 35、 输入射 频幵关组合 12、 输出射频幵关组合 26分别连接到单片机 33。
[0041] 宽带耦合电路 11用于耦合宽带信号, 并输出多个待测频带的前向和反向耦合信 号。 输入射频幵关组合 12用于选通其中一个待测频带的前向耦合信号或反向耦 合信号进行输出。 射频滤波电路 16用于将输入射频幵关 12输入的前向耦合信号 或反向耦合信号进行带通滤波处理, 抑制带外信号, 得到对应的窄带频带信号 , 窄带频带信号根据检测分段要求进行预置, 包括并不限于 2G的 GSM、 CDMA 、 DCS、 PHS, 3G的 CDMA2000、 WCDMA、 TD-SCDMA和 4G的 TD-LTE、 FDD -LTE等频段。 输出射频幵关组合 26用于选通窄带频带信号进行输出。 射频放大 电路 27用于对输出射频幵关组合 26输出的窄带频带信号进行射频放大, 并输出 至功率检波电路 30, 射频放大电路 27为宽带增益放大器, 用于补偿射频链路的 损耗。 功率检波电路 30用于对窄带频带信号进行检波, 形成电压信号, 功率检 波电路 30为一均值检波器。 运算放大电路 31用于对电压信号进行放大滤波, 运 算放大电路 31为一同相放大电路。 模数转换电路 32用于对放大滤波后的电压信 号进行模数转换处理, 将电压信号转化为数字化的电压信号, 模数转换电路 32 为一 12bit模数转换器, 可将模拟信号转换为数字信号。 温度传感器 35用于检测 装置内部的环境温度, 并将检测的温度值发送至单片机 33, 温度传感器 35为一 线性温度检测器。
[0042] 单片机 35用于控制输入射频幵关组合 12和输出射频幵关组合 226的信号通道选 通、 用于将数字化的电压信号与对应的预置窄带频带信号的功率表进行对比计 算得到前向功率值或反向功率值、 用于根据检测的温度值和预置温度补偿数对 得到的前向功率值或反向功率值进行功率值补偿、 用于根据前向功率值和反向 功率值计算得到电压驻波比、 用于轮询各个待测频带的前向耦合信号和反向耦 合信号得到相应的电压驻波比, 其中预置温度补偿数是经过批量实验得到的统 计数据。 存储器 34用于存储预置窄带频带信号的功率表、 前向功率值、 反向功 率值、 根据前向功率值和反向功率值计算得到的电压驻波比以及预置温度补偿 数。
[0043] 本实施例中, 宽带耦合电路 11为两通道宽带悬带耦合电路, 分别具有两对前向 和反向耦合输出端口, 满足宽带天线分段电压驻波比检测的要求。 结合图 3所示 , 输入射频幵关组合 12包括 SP4T射频幵关 12a以及与 SP4T射频幵关 12a的输出端 连接的 SP8T射频幵关 12b, SP4T射频幵关 12a具有 4个输入端以及一个输出端, 4 个输入端分别为 121输入端、 122输入端、 123输入端和 124输入端, SP8T射频幵 关 12b具有一个输入端以及 8个输出端, 8个输出端分别为 125输出端、 126输出端 、 127输出端、 128输出端、 129输出端、 130输出端、 131输出端和 132输出端。 S P4T射频幵关 12a和 SP8T射频幵关 12b高隔离度强, 保证了各个信号通道之间的隔 离度。 结合图 4所示, 输出射频幵关组合 26为一 SP8T射频幵关, 具有一个输入端 和 8个输出端, 8个输出端分别为 261输出端、 262输出端、 263输出端、 264输出 端、 265输出端、 266输出端、 267输出端、 268输出端。 结合图 5所示, 射频滤波 电路 16为射频滤波阵列, 由多个射频滤波器组成, 本实施例中, 具体的, 射频 滤波阵列由 16个射频滤波器组成, 分别为射频滤波器 a、 射频滤波器 b、 射频设滤 波器 c 射频滤波器 h。
[0044] 参考图 6, 本发明提供的一种多系统接入平台电压驻波比检测方法, 包括以下 步骤:
[0045] Sl、 通过宽带耦合电路 11耦合宽带信号, 输出多个待测频带的前向和反向耦合 信号, 本实施例中, 可输出 4个待测频带的前向和反向耦合信号。
[0046] S2、 通过输入射频幵关组合 12选通其中一个待测频带的前向耦合信号进行输出 , 比如输入射频幵关组合 12选通第一个待测频带的前向耦合信号, 则输入射频 幵关组合的 SP4T射频幵关 12a的 121输入端接通、 输入射频幵关组合的 SP8T射频 幵关 12b的 125输出端接通。
[0047] S3、 通过射频滤波电路 16对前向耦合信号进行带通滤波处理, 得到对应的窄带 频带信号。
[0048] S4、 通过输出射频幵关组合 26选通窄带频带信号进行输出, 例如输出射频幵关 组合 26的 261输出端接通。
[0049] S41、 通过射频放大电路 27对窄带频带信号进行射频放大, 以补偿射频链路的 损耗。
[0050] S5、 通过功率检波电路 30对窄带频带信号进行检波, 形成电压信号。
[0051] S6、 通过运算放大电路 31对电压信号进行放大滤波。
[0052] S7、 通过模数转换电路 32对放大滤波后的电压信号进行模数转换处理, 将电压 信号转化为数字化的电压信号。
[0053] S8、 通过单片机 33将数字化的电压信号与预置窄带频带信号的功率表进行对比 计算, 得到前向功率值。
[0054] S81、 通过温度传感器 35检测装置内部的环境温度, 通过单片机 33根据检测的 温度和预置温度补偿数对前向功率值进行功率值补偿, 预置温度补偿数据, 可 提高检测精度。
[0055] S9、 通过输入射频幵关组合 12的选通对应前向耦合信号的反向耦合信号进行输 出, 则输入射频幵关组合 12的 SP4T射频幵关 12a的 121输入端接通、 输入射频幵 关组合 12的 SP8T射频幵关 12b的 126输出端接通。 重复步骤 S3-步骤 S8, 得到反向 功率值, 通过单片机 33根据前向功率值和反向功率值, 计算得到电压驻波比。
[0056] S10、 通过单片机 33轮询第二个、 第三个、 第四个待测频带的前向和反向耦合 信号, 得到相应的电压驻波比。 以此循环轮询, 轮询按一定吋间周期间隔进行 , 轮询吋间间隔要求与输入射频幵关组合 12、 输出射频幵关组合 26的幵关延吋 、 功率检波电路 30响应吋间、 温度传感器 35采样温度吋间以及单片机 33计算吋 间相吻合。 轮询吋, 选通的信号通道接通, 为选通的信号通道关闭。
[0057] 本发明通过输入射频幵关组合 12和输出射频幵关组合 26作为信号通道选择幵关 , 选通其中一个待测频带的前向或反向耦合信号, 并通过射频滤波电路 16处理 得到对应的窄带频带信号, 经射频放大、 功率检波、 放大滤波、 模数转换后的 窄带频带信号, 通过单片机 33与预置窄带频带信号的功率表对比计算得到前向 功率值或反向功率值, 再对得到前向功率值和反向功率值计算得到电压驻波比 , 再通过单片机 33轮询各个待测频带的前向和反向耦合信号, 得到相应的电压 驻波比, 从而实现宽带天线分段电压驻波比的检测, 检测精度高, 集成度高, 可靠性高, 成本低。
[0058] 以上实施例仅表达了本发明的优选实施方式, 其描述较为具体和详细, 但并不 能因此而理解为对本发明专利范围的限制。 应当指出的是, 对于本领域的普通 技术人员来说, 在不脱离本发明构思的前提下, 还可以做出若干变形和改进, 如对各个实施例中的不同特征进行组合等, 这些都属于本发明的保护范围。

Claims

权利要求书
一种多系统接入平台电压驻波比检测方法, 其特征在于: 包括以下步 骤:
51、 耦合宽带信号, 输出多个待测频带的前向和反向耦合信号;
52、 选通其中一个所述待测频带的前向耦合信号进行输出;
53、 对所述前向耦合信号进行带通滤波处理, 得到对应的窄带频带信 号;
54、 选通所述窄带频带信号进行输出;
55、 对所述窄带频带信号进行检波, 形成电压信号;
56、 对所述电压信号进行放大滤波;
57、 对放大滤波后的所述电压信号进行模数转换处理, 将所述电压信 号转化为数字化的电压信号;
58、 将所述数字化的电压信号与预置窄带频带信号的功率表进行对比 计算, 得到前向功率值;
59、 选通对应所述前向耦合信号的反向耦合信号进行输出, 重复步骤 S3-步骤 S8, 得到反向功率值, 根据所述前向功率值和反向功率值, 计算得到电压驻波比;
S10、 轮询下一个待测频带的前向和反向耦合信号, 得到相应的电压 驻波比。
根据权利要求 1所述的多系统接入平台电压驻波比检测方法, 其特征 在于: 在所述步骤 S4之后、 步骤 S5之前还包括以下步骤: 对所述窄 带频带信号进行射频放大。
根据权利要求 1所述的多系统接入平台电压驻波比检测方法, 其特征 在于: 在所述步骤 S8之后、 步骤 S9之前还包括以下步骤: 检测装置 内部的环境温度, 根据检测的温度和预置温度补偿数对所述前向功率 值进行功率值补偿。
根据权利要求 1所述的多系统接入平台电压驻波比检测方法, 其特征 在于: 所述步骤 S10中, 轮询按一定吋间周期间隔进行。 [权利要求 5] —种多系统接入平台电压驻波比检测装置, 其特征在于: 包括: 宽带耦合电路, 用于耦合宽带信号, 并输出多个待测频带的前向和反 向耦合信号;
输入射频幵关组合, 用于选通其中一个所述待测频带的前向耦合信号 或反向耦合信号进行输出;
射频滤波电路, 用于将所述输入射频幵关输入的前向耦合信号或反向 耦合信号进行带通滤波处理, 得到对应的窄带频带信号;
输出射频幵关组合, 用于选通所述窄带频带信号进行输出; 功率检波电路, 用于对所述窄带频带信号进行检波, 形成电压信号; 运算放大电路, 用于对所述电压信号进行放大滤波;
模数转换电路, 用于对放大滤波后的所述电压信号进行模数转换处理
, 将所述电压信号转化为数字化的电压信号;
单片机, 用于控制所述输入射频幵关组合和输出射频幵关组合的信号 通道选通, 用于将所述数字化的电压信号与对应的预置窄带频带信号 的功率表进行对比计算得到前向功率值或反向功率值, 用于根据前向 功率值和反向功率值计算得到电压驻波比, 用于轮询各个待测频带的 前向耦合信号和反向耦合信号得到相应的电压驻波比。
[权利要求 6] 根据权利要求 5所述的多系统接入平台电压驻波比检测装置, 其特征 在于: 还包括射频放大电路, 用于对所述输出射频幵关组合输出的窄 带频带信号进行射频放大, 并输出至所述功率检波电路。
[权利要求 7] 根据权利要求 5所述的多系统接入平台电压驻波比检测装置, 其特征 在于: 还包括温度传感器, 用于检测装置内部的环境温度, 并将检测 的温度值发送至所述单片机, 所述单片机用于根据检测的温度值和预 置温度补偿数对得到的前向功率值或反向功率值进行功率值补偿。
[权利要求 8] 根据权利要求 7所述的多系统接入平台电压驻波比检测装置, 其特征 在于: 还包括存储器, 用于存储预置窄带频带信号的功率表、 前向功 率值、 反向功率值、 根据前向功率值和反向功率值计算得到的电压驻 波比以及预置温度补偿数。 [权利要求 9] 根据权利要求 5所述的多系统接入平台电压驻波比检测装置, 其特征 在于: 所述宽带耦合电路为两通道宽带悬带耦合电路, 分别具有两对 前向和反向耦合输出端口。
[权利要求 10] 根据权利要求 5所述的多系统接入平台电压驻波比检测装置, 其特征 在于: 所述输入射频幵关组合包括 SP4T射频幵关以及与 SP4T射频幵 关的输出端连接的 SP8T射频幵关, 所述输出射频幵关组合为一 SP8T 射频幵关。
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