WO2017032209A1 - 一种lte天线智能测量系统 - Google Patents
一种lte天线智能测量系统 Download PDFInfo
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- WO2017032209A1 WO2017032209A1 PCT/CN2016/092832 CN2016092832W WO2017032209A1 WO 2017032209 A1 WO2017032209 A1 WO 2017032209A1 CN 2016092832 W CN2016092832 W CN 2016092832W WO 2017032209 A1 WO2017032209 A1 WO 2017032209A1
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- lte antenna
- measuring system
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- transmitting
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/10—Radiation diagrams of antennas
Definitions
- the present invention relates to the field of antenna technologies, and relates to an antenna measurement system, and more particularly to an LTE antenna intelligent measurement system.
- the antenna is a converter of communication equipment circuit signals and space radiated electromagnetic waves, and is an important component of the mobile communication system, and its performance directly affects the performance of the entire communication system.
- LTE technology One of the key technologies adopted by the fourth generation mobile communication is LTE technology.
- the LTE antenna is applied to the terminal equipment of the 4G system as the LTE technology.
- the technical requirements include broadband, multi-band and dual polarization.
- the LTE antenna puts high demands on the measurement system, and the existing antenna measurement system (Fig. 1) mainly includes the transmitting device subsystem, the turntable subsystem and the radio frequency subsystem.
- the turntable subsystem has only one azimuth rotating shaft, and the radio frequency subsystem
- the point frequency signal generating device is used, and the antenna to be tested is directly connected to the receiver.
- the disadvantage of the system is that only one frequency point, one port, and a radiation pattern in a polarization state can be measured for one antenna erection, for multi-frequency points.
- the measurement of the multi-port, dual-polarized LTE antenna requires artificial adjustment of the test frequency, test port and polarization mode of the antenna to be tested, which will affect the measurement efficiency and measurement accuracy.
- the present invention is directed to the shortcomings of the existing antenna measuring system, and proposes a novel antenna measuring system for solving the polarization mode, measuring port and frequency of the existing transmitting antenna when the existing measuring system measures the LTE antenna.
- the problem of low measurement efficiency and low precision comes.
- An LTE antenna intelligent measuring system comprises a transmitting device subsystem 1, a turntable subsystem 2, a radio frequency subsystem, a servo drive subsystem and a computer subsystem; the servo drive subsystem is simultaneously connected to the transmitting device subsystem and the turntable subsystem The computer subsystem is simultaneously coupled to the servo drive subsystem and the radio frequency subsystem.
- the transmitting device subsystem 1 is provided with a transmitting polarization device 11 for adjusting the polarization state of the transmitting antenna.
- the turret subsystem 2 includes a seven-dimensional motion device, a locking device 21, and an antenna mounting frame 29 to be tested;
- the seven-dimensional motion device includes a hydraulic device 20, a lower azimuth device 23, and a pitch device 24
- the hydraulic device 20 is connected to the turret base 22, the lower azimuth device 23, the pitch device 24, the upper azimuth device 25, the translation device 26, the lifting device
- the device 27 and the receiving polarization device 28 are mounted on the base 22 in order from bottom to top, and the base 22 is connected to the hydraulic device 20.
- Turntable subsystem Adjust the attitude of the antenna to be tested.
- the above LTE antenna intelligent measurement system includes a vector network analyzer 7 and a multiplexer 9.
- the servo drive subsystem comprises a servo drive (3) and a multi-axis control card (4); the multi-axis control card (4) is connected to the servo drive (3), and the servo drive (3) corresponds to each device in the turntable subsystem The servo motor is connected.
- the antenna mounting frame 29 to be tested is mounted on the receiving polarization device 28.
- the turntable base 22 is composed of a support plate 221 and a vertical column 220 perpendicular thereto, and a locking device 21 is disposed at a joint of the column 220 and the support plate 221.
- the multiplexer 9 includes a programmable control module having a size of at least 8 and 1; the RF input port 90 of the multiplexer 9 is connected to the antenna 10 to be tested, and the control port 91 and the real-time controller The (RTC) 6 is connected, and the RF output port 92 is connected to the vector network analyzer 7.
- RTC real-time controller
- the RF output port 92 is connected to the vector network analyzer 7.
- the above LTE antenna intelligent measurement system the computer subsystem comprises a computer, a network card 5, a real-time controller (RTC) (6), data processing software and control software, the network card 5, the data processing software and the control software are installed on the computer, the network card 5 Simultaneously connected to the multi-axis control card 4 and the real-time controller 6, the real-time controller (RTC) 6 is simultaneously connected to the vector network analyzer 7 and the multiplexer 9.
- the control software includes an intelligent measurement module, a turntable control module, and a vector network analyzer control module.
- the turntable control module includes a system initialization module, a controller parameter setting module, a rotation state control module, a zero position control module, a position value display function module, and an accident processing module.
- the invention has the following advantages:
- the turret subsystem of the present invention comprises a seven-dimensional motion device and a locking device, wherein the receiving polarization device and the tilting device can realize a radiation pattern of the horizontal and vertical planes of the antenna to be tested only by one antenna erection;
- the device can adjust the phase center of the antenna to be tested to realize the coincidence of the antenna axis and the rotating shaft;
- the lifting device can compensate the longitudinal offset of the phase center when the electronically adjustable antenna is tilted down or up, so that the transmitting and receiving antennas are highly accurately aligned;
- the locking device ensures The base of the turntable is stable; the hydraulic device makes the antenna erection convenient and fast; the organic combination of the above devices is beneficial to improve measurement efficiency and accuracy.
- the radio frequency subsystem of the present invention is provided with a multi-way switch and a lost network analyzer, wherein the multi-way switch realizes automatic switching of multiple radio frequency input ports through program control, and the radiation pattern of multiple ports can be obtained by one erection;
- the vector network analyzer is equipped with a frequency sweeping signal generator, so the system has a sweep measurement function, which greatly improves the measurement efficiency compared with the existing need to manually replace the antenna port and change the measurement frequency.
- the transmitting device subsystem of the present invention is provided with a transmitting polarization device, which realizes that only one transmitting antenna is required to complete the measurement of the radiation pattern under multiple polarization states of the antenna to be tested, and the existing needs Repeated manual conversion of launch days Compared with the polarization mode of the line, the measurement efficiency of the antenna is improved, and the error caused by multiple clamping is reduced, and the measurement accuracy is improved.
- FIG. 1 is a schematic structural view of a conventional measurement system
- test turntable 20, antenna support to be tested; 30, antenna to be tested; 14, turntable driver; 16, turntable controller; 40, transmit antenna; 50, signal source; 60, receiver; 62, electromagnetic wave;
- Figure 2 is a schematic view of the overall structure of the present invention.
- Figure 3 is a schematic structural view of a turntable subsystem of the present invention.
- FIG. 2 - Figure 4 1-transmitter subsystem, 2-turntable subsystem, 3-servo drive, 4-multi-axis control card, 5-network card, 6-real-time controller (RTC), 7-vector network analysis Instrument, 8 - low noise amplifier, 9 - multi-way switch, 10 - antenna to be tested, 11 - transmitting polarization device, 20 - hydraulic device, 21 - locking device, 22 - base, 220 - column, 221 - support plate , 23 - lower azimuth device, 24 - pitch device, 25 - upper azimuth device, 26 - translation device, 27 - lifting device, 28 - receiving polarization device, 29 - antenna mounting frame to be tested, 90 - RF input port, 91—Control port, 92—RF output port.
- RTC real-time controller
- the present invention includes a transmitting device subsystem, a turntable subsystem, a radio frequency subsystem, a servo drive subsystem, and a computer subsystem; a transmitting device subsystem and a turntable subsystem are respectively connected to a servo drive subsystem; an RF subsystem and a servo The drive subsystems are each connected to a computer subsystem.
- the transmitting device subsystem comprises a transmitting polarization device 11, a high frequency rotating joint, a flange and a transmitting polarization device bracket, and the transmitting polarization device 11 adopts a worm gear reducer structure, which has high precision and programmable 360 degree continuous motion.
- high-frequency rotating joints are used to solve the problem of cable winding during testing
- flanges are used to fix the transmitting antenna
- high-frequency rotating joints and flanges are respectively fixed on the front side of the transmitting polarization device 11 and The rear side
- the transmitting polarization device bracket is made of a triangular shape for fixing and supporting the transmitting polarization device 11.
- the RF subsystem includes a multiplexer 9, a vector network analyzer 7, a low noise amplifier 8, a power amplifier, a cable adapter, and an RF cable.
- the multiplexer 9 uses a programmable multi-way switch for automatic switching between multi-port antenna ports; the output port of the vector network analyzer 7 is sequentially connected to the power amplifier and the transmitting antenna, and the vector network analyzer 7
- the input port is sequentially connected to the low noise amplifier 8, the multiplexer 9 and the antenna to be tested; for the convenience of connection, the multiplexer 9 can be mounted on the back of the antenna mount 29 to be tested; in addition to the high sensitivity, the vector network analyzer 7
- the servo drive subsystem includes a servo drive 3 and a multi-axis control card 4.
- the multi-axis control card 4 is connected to the servo driver 3.
- the servo driver 3 is connected to the servo motor corresponding to each axis of the turntable, and the servo motor is an AC servo motor.
- the motor can be configured with various encoders to meet various needs of the user.
- the servo drive The 3 and multi-axis control card 4 are mounted in the control cabinet.
- the computer subsystem comprises a computer, a network card 5, a real-time controller (RTC) 6, system control software and data processing software, the network card 5, the data processing software and the system control software are installed on the computer, and the network card 5 is simultaneously connected with the multi-axis control card.
- 4 is connected to the real-time controller 6, and the real-time controller (RTC) 6 is simultaneously connected to the multiplexer 9 and the vector network analyzer 7.
- the real-time controller (RTC) 6 according to the position feedback information of the azimuth rotation axis, when reaching the scanning position, first performs multi-channel switching channel switching, and then performs frequency sweep measurement.
- the main tasks of the real-time controller (RTC) 6 are: initial setting of measurement, start and stop control of measurement, waiting for external position signal, control multiplexer 9 switching and trigger vector network analyzer 7;
- the system control software includes a turntable control module, a vector network analyzer control module and an intelligent measurement module.
- the control software can be programmed in Delphi language, and the language can provide a variety of graphical programming frameworks.
- the turntable control module includes a system initialization module: initializing the board used in the system; a controller parameter setting module: setting parameters for the controller used in the system; and a rotation state control module: setting the rotation start position and the end position and rotating Speed, click the start button to rotate the motion, select the rotary axis, set the speed, input the rotation speed and then rotate continuously according to this speed; zero control module: automatically position the selected axis in the zero position; position value display function Module: real-time display of the position value of the rotary motion axis; accident handling module: display the faults that occur during system operation;
- the vector network analyzer control module includes the settings of the transmit power, the intermediate frequency bandwidth, and the frequency. If the sweep measurement is performed, the bandwidth and the number of frequency points should be set.
- the intelligent measurement module performs corresponding parameter setting according to the test requirements, and clicks the smart measurement button to complete all posture actions of the antenna space to be tested. In this process, the measurement personnel do not need to perform any operation, thereby improving the measurement efficiency.
- the amplitude and phase data stored in the vector network analyzer 7 are collected and stored by the network card 5.
- the data processing software calculates the antenna radiation parameters, displays the measurement results and automatically generates measurement reports.
- the turret subsystem 2 includes a hydraulic device 20, a locking device 21, a turret base 22, a lower azimuth device 23, a pitch device 24, an upper azimuth device 25, a translation device 26, a lifting device 27, and a receiving polarization.
- the device 28 and the antenna mount 29 to be tested; connected to the hydraulic device 20 is a turret base 22.
- Above the turntable base 22 from bottom to top A lower azimuth turret device 23, a pitch device 24, an upper azimuth turret device 25, a translation device 26, a lifting device 27, and a transmitting polarization device 28 are mounted.
- the turret base 22 is composed of a support plate 221 and a vertical column 220 perpendicular thereto.
- One end of the hydraulic device 20 is fixed to the side of the column 220, and the other end is fixed to the support plate 221, and a lock is arranged at the connection between the support plate 221 and the column 220.
- the tightening device 21 is located on the opposite side of the hydraulic device.
- the hydraulic device 20 is used to lift and lower the turntable.
- the clamping cylinder When lifting, the clamping cylinder is retracted first, and the locking device is loosened.
- the cylinder rod of the cylinder is lowered and begins to lift.
- the hydraulic cylinder stops protruding after the induction switch is touched.
- the clamping cylinder begins to extend, and after the lock is in place, the lifting action is completed. If the power is suddenly lost during the lift or the emergency stop button is pressed, the hydraulic system locks the cylinder down to prevent the cylinder from sliding down.
- the clamping cylinder When the downturning, the clamping cylinder is retracted first, and the locking device is loosened. When the clamping cylinder is completely released in place, after touching the sensing switch, it starts to retract and begins to lower the turntable. Before the end point is lowered, the piston rod enters the buffer zone, and after the cylinder rod is retracted to the position, after touching the induction switch, the cylinder is turned down to stop retracting, and the reversing action is completed. Sudden power failure or manual stop during the dumping process, the hydraulic system locks the cylinder down to prevent the cylinder from sliding down.
- the hydraulic device adopts PLC control, which can be remotely controlled.
- the electrical part has protection functions such as power phase loss, leakage, overload, undervoltage and short circuit.
- the lower azimuth device 23 and the upper azimuth device 25 can drive the antenna to be tested for azimuth rotation, adopting a worm gear structure, high precision and self-locking.
- the slewing bearing adopts YRT bearing.
- the bearing has high axial and radial bearing capacity and high tilting rigidity, which ensures the load capacity of 820kg and large eccentricity.
- the high precision ensures the rotation precision of the table.
- a conductive slip ring through hole is reserved in the middle of the table, and a high-frequency rotating joint is arranged to prevent the high-frequency line from being wound.
- the tilting device 24 is used to adjust the pitch attitude of the antenna, and adopts a worm gear reducer and a sector gear two-stage speed reducer and a drive motor, the pitch range is ⁇ 30 degrees, a zero switch is installed in the middle of the sector gear, and electrical limit and mechanical are installed on both sides. Limit.
- the translation device 26 is used for adjusting the phase center of the antenna to be tested to coincide with the rotation axis, so that the antenna installation is more accurate
- the translation plate material is steel plate
- the driving device is composed of a servo motor, a triangular precision screw, a worm gear reducer and a linear guide. 150mm stroke, equipped with electrical limit and mechanical limit, electric or manual positioning.
- the lifting device 27 is used to adjust the phase center of the antenna to be tested, and is configured with an electrical limit and a mechanical limit.
- the drive unit is composed of servo motor, triangular precision lead screw, worm gear reducer and linear guide.
- the outer cover is equipped with dustproof and beautiful appearance, and the lifting range is 700mm electric lifting.
- the receiving polarization device 28 is used to mount the antenna to be tested and adjust the polarization state.
- One end of the receiving polarization device 28 is mounted with a high-frequency rotating joint for preventing the high-frequency cable from being entangled during the test, and the other end is connected to the antenna mounting bracket 29 to be used for erecting Antenna to be tested.
- the receiving polarization device 28 adopts a worm gear reducer structure, which has the advantages of high precision, programmable 360 degree continuous motion and self-locking.
- the working principle of the whole system is: the computer outputs the control signal to the servo driver 3 by controlling the multi-axis control card 4, and controls the movement of the azimuth device, the pitch device, the translation device, the lifting device, the receiving antenna polarization device, and the transmitting polarization device, respectively. .
- the computer controls the real-time controller (RTC) 6 through the network card 5 to realize the switching of the multi-way switch 9, and collects the amplitude and phase data of the radiation pattern of the antenna to be tested through the trigger vector network analyzer 7, and uses the data processing software to collect the data. Perform calculations and processing.
- the control software and data processing software adopt a modular structure. The operator can automatically perform measurement and analysis calculations according to the menu prompts and input the required parameters, and can quickly obtain the required high-precision measurement results and automatically generate tests. report.
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Abstract
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Claims (10)
- 一种LTE天线智能测量系统,其特征在于:包括发射装置子系统(1)、转台子系统(2)、射频子系统、伺服驱动子系统和计算机子系统;所述伺服驱动子系统同时与发射装置子系统(1)和转台子系统(2)相连;所述计算机子系统同时与射频子系统和伺服驱动子系统相连。
- 根据权利要求1所述的一种LTE天线智能测量系统,其特征在于:所述发射装置子系统(1)中设置有发射极化装置(11)。
- 根据权利要求2所述的一种LTE天线智能测量系统,其特征在于:所述转台子系统(2)包括液压装置(20)、下方位装置(23)、俯仰装置(24)、上方位装置(25)、平动装置(26)、升降装置(27)和接收极化装置(28);下方位装置(23)、俯仰装置(24)、上方位装置(25)、平动装置(26)、升降装置(27)和接收极化装置(28)由下至上依次安装在底座(22)上,底座(22)与液压装置(20)相连。
- 根据权利要求3所述的一种LTE天线智能测量系统,其特征在于:所述射频子系统包括矢量网络分析仪(7)和多路开关(9)。
- 根据权利要求4所述的一种LTE天线智能测量系统,其特征在于:所述伺服驱动子系统包括伺服驱动器(3)和多轴控制卡(4);多轴控制卡(4)与伺服驱动器(3)相连,伺服驱动器(3)与转台子系统中各个装置所对应的伺服电机相连。
- 根据权利要求5所述的一种LTE天线智能测量系统,其特征在于:所述接收极化装置(28)中设置有待测天线安装架(29)。
- 根据权利要求6所述的一种LTE天线智能测量系统,其特征在于:所述底座(22)包括支撑板(221)和立柱(220),支撑板(221)和立柱(220)相互垂直,两者连接处设置有锁紧装置(21)。
- 根据权利要求7所述的一种LTE天线智能测量系统,其特征在于:所述多路开关(9)包括可编程控制模块,多路开关(9)的射频输入端口(90)与待测天线(10)相连,控制端口(91)与实时控制器(RTC)(6)相连,射频输出端口(92)与矢量网络分析仪(7)相连。
- 根据权利要求8所述的一种LTE天线智能测量系统,其特征在于:所述计算机子系统包括计算机、网卡(5)、实时控制器(RTC)(6)、数据处理软件和 控制软件;网卡(5)同时与多轴控制卡(4)和实时控制器(RTC)(6)相连,实时控制器(RTC)(6)同时与矢量网络分析仪(7)和多路开关(9)相连;控制软件包括智能测量模块、转台控制模块和矢量网络分析仪控制模块。
- 根据权利要求9所述的一种LTE天线智能测量系统,其特征在于:所述转台控制模块包括系统初始化模块、控制器参数设置模块、旋转状态控制模块、零位控制模块、位置值显示功能模块、事故处理模块。
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