W波段调频连续波雷达收发前端

发布时间：2018-01-06 16:17

  本文关键词：W波段调频连续波雷达收发前端　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： 毫米波 W波段 调频连续波 收发前端

【摘要】：W波段属于毫米波波段中的大气窗口频段,该波段的收发前端电路研究一直是毫米波应用领域的热点课题。收发前端是微波毫米波雷达电路与系统中的关键组件,对系统性能有着举足轻重的影响。本文的主要工作就是对一种W波段雷达收发前端电路进行了设计和实现。本文分析了毫米波雷达收发前端的相关核心理论,研究了调频连续波体制雷达的基本结构和工作原理,根据理论和本文的需求,提出了多个腔体结构的一发两收W波段调频连续波雷达收发前端的设计方案。论文的工作主要体现在以下几个方面:首先,分别对W波段和Ka波段的两种形式的微带线-波导探针过渡进行了分析和设计,并且应用到了收发前端电路中;然后,分析了微带线和波导结构的毫米波带通滤波器的设计方法,设计了一款平行耦合微带线滤波器,并提出了一种新颖的将波导E面金属膜片滤波器和Tee型功分器相结合的结构,在不影响滤波性能的基础上节省了空间。该结构应用于三倍频器模块和二倍频器模块之间,以实现对三倍频器的基波和其他谐波的抑制;其次,对于系统电路的各个有源部件,选用了符合系统需求的MMIC芯片,提高了系统电路的性能;再次,对收发前端系统电路各个腔体的具体结构和电路板进行了设计和绘制,满足了技术指标对于整体尺寸和接口位置的要求;最后,完成了对收发前端电路各个模块的组装、调试和测试。经过调试和测试,达到了以下主要技术指标:发射机:发射功率20.17d Bm-20.25dBm,带内波纹≤3%;接收机:IQ信号幅度不一致性≤1dB,相位不一致性≤8°。
[Abstract]:The W band belongs to the atmosphere window frequency band in the millimeter wave band. The research of transceiver front-end circuit in this band has been a hot topic in millimeter-wave application field. The transceiver front-end is the key component of microwave millimeter-wave radar circuit and system. The main work of this paper is to design and implement a W-band radar transceiver front-end circuit. This paper analyzes the core theory of millimeter-wave radar transceiver front-end. The basic structure and working principle of FM CW radar are studied, according to the theory and the demand of this paper. In this paper, a design scheme of the transceiver front of multi-cavity structure is presented. The main work of this paper is as follows: first. Two kinds of microstrip wire-waveguide probe transition in W band and Ka band are analyzed and designed, and applied to the transceiver front-end circuit. Then, the design method of millimeter wave bandpass filter with microstrip line and waveguide structure is analyzed, and a parallel coupled microstrip line filter is designed. A novel structure combining waveguide E-plane metal diaphragm filter with Tee type power divider is proposed. The structure is applied between the tripler module and the doubler module to suppress the fundamental wave and other harmonics of the tripler. Secondly, for each active component of the system circuit, the MMIC chip is selected to meet the system requirements, which improves the performance of the system circuit. Thirdly, the specific structure and circuit board of each cavity of the transceiver front-end circuit are designed and drawn, which meet the requirements of the technical specifications for the overall size and interface position; Finally, the module of transceiver front-end circuit is assembled, debugged and tested. The main technical specifications are achieved as follows: transmitter: transmitting power 20.17d Bm-20.25dBm, band ripple 鈮，

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