20-40GHz宽带锁相频率源技术研究

发布时间：2018-11-23 07:54

【摘要】：频率源作为电子系统的核心部件之一,其性能对整个系统的工作质量起着决定性影响。随着无线电通信技术的发展,频谱资源日益紧张,研究热点转向频率更高的毫米波频段。因此性能优异的高频宽带频率源研制具有重要的研究价值和现实意义。基于这种背景,本文提出构建一个输出频段为20-40GHz的宽带频率源,并在宽带内实现良好的功率平坦度和杂散抑制。本文首先对锁相环频率源的基本组成、工作原理和性能参数做了简要介绍。然后根据课题提出的技术指标,结合市面可购买器件的工作特性,分析了几种宽带频率合成技术的优缺点,最终确定了“宽带单环锁相PLL+2倍频”的实现方案。课题主要分为以下三个模块来研究:(1)10-20GHz宽带单环锁相频率源模块器件的选型、腔体和版图的设计和后期电路的调试;(2)20-40GHz二倍频模块的器件选型、电路设计与加工、测试及结果分析;(3)实现10-20GHz的VCO输出信号与20-40GHz的2次倍频信号的选频分段滤波。前期工作包括频段的规划、滤波器的设计、开关芯片的选择。后期工作主要是电路的设计、腔体的加工、模块的测试与调试。完成各个单元模块的测试后,将它们逐一级联起来进行测试,调试各级模块使测试结果尽可能达到课题提出的技术指标要求。最后对实验过程中遇到的问题进行了反思与总结,从技术及方案层面分析了某些指标项未完成的原因,并提出了下一步改进方案。
[Abstract]:As one of the core components of the electronic system, the performance of the frequency source has a decisive effect on the working quality of the whole system. With the development of radio communication technology, the spectrum resources are increasingly scarce. Therefore, the development of high frequency broadband frequency source with excellent performance has important research value and practical significance. Based on this background, a wideband frequency source with output band of 20-40GHz is proposed, and good power flatness and spurious suppression are realized in the broadband. In this paper, the basic composition, working principle and performance parameters of the PLL frequency source are introduced briefly. Then according to the technical specifications and the working characteristics of the available devices in the market, the advantages and disadvantages of several broadband frequency synthesis techniques are analyzed, and the implementation scheme of "broadband single-loop phase-locked PLL 2 double frequency" is finally determined. The subject is mainly divided into the following three modules: (1) the selection of 10-20GHz broadband single-loop phase-locked frequency source module, the design of cavity and layout, and the later circuit debugging; (2) device selection, circuit design and fabrication, test and result analysis of 20-40GHz second frequency doubling module; (3) realization of frequency selective segmental filtering of VCO output signal of 10-20GHz and second frequency doubling signal of 20-40GHz. The previous work includes the planning of frequency band, the design of filter and the choice of switch chip. Later work is mainly circuit design, cavity processing, module testing and debugging. After completing the test of each unit module, they are cascaded one by one to test, and the test results can meet the technical requirements of the subject as much as possible by debugging the modules at all levels. Finally, the problems encountered in the experiment are reviewed and summarized, and the reasons for the uncompleted index items are analyzed from the technical and program aspects, and the next improvement scheme is put forward.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN74

【共引文献】