一种近场天线测试系统的中频控制模块设计与实现

发布时间：2018-11-04 20:39

【摘要】：在现代雷达天线的研制生产中,通常需要对天线的各项参数指标进行快速测试,以验证天线性能是否满足设计要求,天线测量是实现这一需求的重要手段,其中,近场天线测量技术由于其具有空间小、实施容易、精度高、自动化等特点,逐渐成为最普遍应用的天线测量手段。本文通过拟对近场天线测量的各部分控制需求分析,如射频信号源、信号调理与采集、命令程控与数据传输等部分,设计了一种近场天线测试系统的中频控制模块,该模块包括硬件和软件两个部分。控制模块硬件设计工作主要针对以下四个部分:第一,命令解析模块,完成对控制软件下发的命令解析分流,并将各功能指令装载到每个功能模块的命令寄存器中;第二,中频通道控制模块设计,完成对程控增益、ADC转换校正、时钟芯片、延时芯片以及分辨率带宽(RBW)的控制及参数设置,目的是为近场幅相测试工作获得良好的量化计算数据;第三,射频信号源控制模块设计,完成对测试所需的激励/本振射频源的参数设置,如频率、功率、驻留时间等,以及源工作方式控制,如触发方式、跳频方式等;第四,数据上传控制模块设计,完成一种基于以太网协议的数据上传通道设计,测量数据上传模式(直传和缓存两种模式)设计。控制模块软件设计工作包括对硬件各功能模块控制函数设计和数据接收处理程序的设计,其中各功能模块控制函数设计工作包括:仪器各功能部分的控制命令、参数定义的设计,以及各模块控制函数库的设计;数据接收处理程序功能包括读取幅相测试数据及基带处理的IQ数据,相应地,计算统计、列表显示出天线连续测试点的幅度比与相位差,计算、显示出对应测试点不同分析带宽的基带信号频谱。论文通过对上述控制硬件和软件各功能模块的测试,以及与天线扫描架进行联调测试工作,验证了控制模块设计方案的正确性,论文设计的近场天线测试系统中频控制模块的性能指标达到了设计预期要求。
[Abstract]:In the development and production of modern radar antenna, it is usually necessary to test the antenna parameters quickly to verify whether the antenna performance meets the design requirements. Antenna measurement is an important means to achieve this requirement. Because of its small space, easy implementation, high precision and automation, near-field antenna measurement technology has gradually become the most widely used antenna measurement method. In this paper, we design an intermediate frequency control module of near-field antenna test system by analyzing the control requirements of various parts of near-field antenna measurement, such as RF signal source, signal conditioning and acquisition, command programming and data transmission, etc. This module includes two parts: hardware and software. The hardware design of the control module is mainly aimed at the following four parts: first, the command analysis module completes the command analysis flow of the control software, and loads each function instruction into the command register of each function module; Secondly, the if channel control module is designed to control and set the parameters of programmable gain, ADC conversion correction, clock chip, delay chip and resolution bandwidth (RBW). The aim is to obtain good quantitative calculation data for near field amplitude phase measurement. Thirdly, the RF signal source control module is designed to complete the parameter setting of the excitation / local oscillator radio frequency source, such as frequency, power, residence time, and operation mode control, such as trigger mode, frequency hopping mode and so on. Fourth, the design of data upload control module, a data upload channel design based on Ethernet protocol, measurement data upload mode (direct transmission and cache mode) design. The software design of the control module includes the design of the control function of each function module of the hardware and the design of the data receiving and processing program. The design of the control function of each function module includes the control command of each function part of the instrument. The design of parameter definition and control function library of each module; The function of the data receiving and processing program includes reading the amplitude-phase test data and the IQ data processed in baseband. Accordingly, calculating statistics. The list shows the amplitude ratio and phase difference of the antenna continuous test points. The spectrum of baseband signals with different analytical bandwidth corresponding to test points is shown. The design of the control module is verified by the testing of the control hardware and software modules, as well as the joint test with the antenna scanner. The performance index of the if control module of the near-field antenna test system designed in this paper meets the expected requirements of the design.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN820

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