本文關鍵詞：線性調(diào)頻連續(xù)波雷達前端系統(tǒng)設計及相關集成技術研究　出處：《電子科技大學》2014年碩士論文　論文類型：學位論文

  更多相關文章： 車載防撞雷達 LFMCW Ka波段 毫米波前端 LCP多層集成

【摘要】：近些年來,雷達系統(tǒng)大量應用于各個領域,在戰(zhàn)場偵察、氣象觀測、精密制導和防撞預警等方面發(fā)揮著越來越重要的作用。現(xiàn)代車載雷達探測器多數(shù)使用毫米波雷達,主要是因為其具有分辨率高及尺寸小等優(yōu)點。相對于其他雷達,線性調(diào)頻連續(xù)波(LFMCW)雷達具有發(fā)射波形簡單、測量精度高和數(shù)字信號處理高效可靠等優(yōu)點。在毫米波FMCW系統(tǒng)中,接收本振信號直接由發(fā)射信號提供,降低了系統(tǒng)復雜度,具有結(jié)構(gòu)簡單、成本低等優(yōu)點,正逐步成為防撞雷達的首選。本論文依托工程項目“Ka波段FMCW車載防撞雷達”,圍繞毫米波車載雷達的毫米波前端部分展開研究。毫米波前端作為毫米波雷達的關鍵組成部分,主要實現(xiàn)雷達系統(tǒng)的變頻以及功率放大。對于毫米波前端系統(tǒng),如何實現(xiàn)各器件以及整體系統(tǒng)的功能是一大難點;另外,對于車載防撞雷達,如何縮小尺寸也是毫米波前端設計與實現(xiàn)的一個難點。通過解決這兩個難點,本文較好的實現(xiàn)了系統(tǒng)對毫米波前端的指標要求,主要內(nèi)容如下:1、基于LFMCW防撞雷達的指標要求,分析了毫米波前端系統(tǒng)涉及到的各項指標,并確定了毫米波前端系統(tǒng)的技術指標;根據(jù)這些技術指標,通過對比常見的雷達結(jié)構(gòu),設計了毫米波前端系統(tǒng)方案,并利用系統(tǒng)仿真軟件ADS完成了系統(tǒng)仿真,仿真結(jié)果表明該方案能滿足設計需求;2、根據(jù)系統(tǒng)要求,設計及實現(xiàn)了毫米波前端系統(tǒng)各單元電路,這些單元電路既能實現(xiàn)各器件的功能又能滿足系統(tǒng)的預算需求,為后期整個毫米波系統(tǒng)的實現(xiàn)奠定了基礎;3、完成了毫米波前端系統(tǒng)的設計,分析了調(diào)試過程中遇到的電磁兼容問題,并提出了解決方法;最終給出了毫米波前端系統(tǒng)的測試結(jié)果;4、基于液晶高分子聚合物(LCP)材料,設計了幾款多層結(jié)構(gòu)無源器件,既滿足系統(tǒng)對各無源器件性能指標的要求,又縮小了無源器件的尺寸,部分研究成果已在2013 International Conference on Computational Problem-Solving(ICCP 2013)發(fā)表,部分研究成果已投Microwave and Optical Technology Letters(MOTL);設計了幾種多層集成系統(tǒng)需要用到的過渡結(jié)構(gòu),為毫米波前端小型化集成奠定了基礎;5、為了進一步提高毫米波前端系統(tǒng)的性能以及實現(xiàn)小型化設計,基于LCP材料完成了微波毫米波前端系統(tǒng)的改進設計,并給出了測試結(jié)果,測試結(jié)果表明該設計達到了LFMCW雷達系統(tǒng)所要求的毫米波前端技術指標。
[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.
【學位授予單位】：電子科技大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN957
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本文編號：1395365