线性调频连续波雷达前端系统设计及相关集成技术研究

发布时间：2018-01-08 03:10

  本文关键词：线性调频连续波雷达前端系统设计及相关集成技术研究　出处：《电子科技大学》2014年硕士论文　论文类型：学位论文

  更多相关文章： 车载防撞雷达 LFMCW Ka波段 毫米波前端 LCP多层集成

【摘要】：近些年来,雷达系统大量应用于各个领域,在战场侦察、气象观测、精密制导和防撞预警等方面发挥着越来越重要的作用。现代车载雷达探测器多数使用毫米波雷达,主要是因为其具有分辨率高及尺寸小等优点。相对于其他雷达,线性调频连续波(LFMCW)雷达具有发射波形简单、测量精度高和数字信号处理高效可靠等优点。在毫米波FMCW系统中,接收本振信号直接由发射信号提供,降低了系统复杂度,具有结构简单、成本低等优点,正逐步成为防撞雷达的首选。本论文依托工程项目“Ka波段FMCW车载防撞雷达”,围绕毫米波车载雷达的毫米波前端部分展开研究。毫米波前端作为毫米波雷达的关键组成部分,主要实现雷达系统的变频以及功率放大。对于毫米波前端系统,如何实现各器件以及整体系统的功能是一大难点;另外,对于车载防撞雷达,如何缩小尺寸也是毫米波前端设计与实现的一个难点。通过解决这两个难点,本文较好的实现了系统对毫米波前端的指标要求,主要内容如下:1、基于LFMCW防撞雷达的指标要求,分析了毫米波前端系统涉及到的各项指标,并确定了毫米波前端系统的技术指标;根据这些技术指标,通过对比常见的雷达结构,设计了毫米波前端系统方案,并利用系统仿真软件ADS完成了系统仿真,仿真结果表明该方案能满足设计需求;2、根据系统要求,设计及实现了毫米波前端系统各单元电路,这些单元电路既能实现各器件的功能又能满足系统的预算需求,为后期整个毫米波系统的实现奠定了基础;3、完成了毫米波前端系统的设计,分析了调试过程中遇到的电磁兼容问题,并提出了解决方法;最终给出了毫米波前端系统的测试结果;4、基于液晶高分子聚合物(LCP)材料,设计了几款多层结构无源器件,既满足系统对各无源器件性能指标的要求,又缩小了无源器件的尺寸,部分研究成果已在2013 International Conference on Computational Problem-Solving(ICCP 2013)发表,部分研究成果已投Microwave and Optical Technology Letters(MOTL);设计了几种多层集成系统需要用到的过渡结构,为毫米波前端小型化集成奠定了基础;5、为了进一步提高毫米波前端系统的性能以及实现小型化设计,基于LCP材料完成了微波毫米波前端系统的改进设计,并给出了测试结果,测试结果表明该设计达到了LFMCW雷达系统所要求的毫米波前端技术指标。
[Abstract]:In recent years, radar systems have been widely used in many fields, such as battlefield reconnaissance and meteorological observation. Precision guidance and collision warning play a more and more important role. Most of the modern vehicle radar detectors use millimeter wave radar. The main reason is that it has the advantages of high resolution and small size. Compared with other radar, the linear frequency modulation continuous wave (LFMCW) radar has simple transmitting waveform. In millimeter-wave FMCW system, the received local oscillator signal is provided directly by the transmitted signal, which reduces the complexity of the system and has a simple structure. The advantages of low cost are gradually becoming the first choice of anti-collision radar. This paper relies on the project "Ka band FMCW vehicle anti-collision radar". The research focuses on the millimeter-wave front-end part of millimeter-wave vehicle radar. As a key component of millimeter-wave radar, millimeter-wave front-end mainly realizes the frequency conversion and power amplification of radar system. For millimeter-wave front-end system. How to realize the functions of each device and the whole system is a big difficulty. In addition, for vehicle-mounted anti-collision radar, how to reduce the size is also a difficulty in the design and implementation of millimeter-wave front-end. The main contents are as follows: 1. Based on the requirement of LFMCW anti-collision radar, the indexes of millimeter-wave front-end system are analyzed, and the technical index of millimeter-wave front-end system is determined. According to these technical specifications, by comparing the common radar structure, the millimeter wave front-end system scheme is designed, and the system simulation software ADS is used to complete the system simulation. The simulation results show that the scheme can meet the design requirements. 2. According to the requirement of the system, every unit circuit of millimeter-wave front-end system is designed and implemented, which can not only realize the function of each device, but also meet the budget requirement of the system. It lays a foundation for the realization of the whole millimeter wave system in the later period. 3. The design of the millimeter-wave front-end system is completed, the electromagnetic compatibility problems encountered in the debugging process are analyzed, and the solutions are put forward. Finally, the test results of millimeter-wave front-end system are given. 4. Based on liquid crystal polymer polymer (LCP) material, several multi-layer passive devices are designed, which not only meet the performance requirements of each passive device, but also reduce the size of passive devices. Part of the research has been done in International Conference on Computational. Problem-Solving@@. ICCP 2013. Some of the research results have been put into Microwave and Optical Technology Letters. Several transition structures for multilayer integrated system are designed, which lays a foundation for the miniaturization integration of millimeter-wave front end. 5. In order to further improve the performance of millimeter-wave front-end system and realize miniaturization design, the improved design of microwave millimeter-wave front-end system is completed based on LCP material, and the test results are given. The test results show that the design meets the requirements of the millimeter wave front end of LFMCW radar system.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN957
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本文编号：1395365