L波段雷达接收机的设计

发布时间：2018-05-30 11:46

本文选题：L波段 + 雷达接收机　；参考：《电子科技大学》2014年硕士论文

【摘要】：接收机是雷达和通信系统的重要组成部分,主要是通过预选滤波、放大、变频、滤波和解调等方法,获取最大限度的有用回波信号,同时滤除无用干扰,将目标反射或散射回的微弱射频回波信号变成有足够幅度的视频或数字信号,用以满足信号处理的要求。超外差接收技术仍然是当前电子系统实现射频信号处理的主要技术,是系统实现其技术性能的关键,特别在相控阵雷达、宽带通信、超宽带电子对抗等高性能电子系统中,高性能、小型化、低功耗的接收前端是超外差接收的关键技术基础。本文研究和设计的雷达接收机为L波段的舰载雷达接收机。该接收机以传统超外差接收机技术为基础,结合当前硬件条件进行了设计。该L波段雷达接收机满足系统所要求的大动态、小型化、低功耗等性能要求,对当前电子系统的应用和性能提高具有重要意义。论文主要内容为:1.阐述了雷达接收机的基本理论,介绍了雷达接收机的几种类型;并对接收机总体参数及各项指标进行了详细介绍,同时对接收机总体设计和各部分设计进行了说明。然后根据接收机的基本原理和指标要求设计出接收机的原理框图。2.根据功能将接收机划分为前端部分、中频部分以及频综部分,并对接收机指标进行了拆分,确定了各个模块的技术指标和实现方式。3.分别介绍了各个分模块主要器件的类型及其特点,特别是对模块指标由重大影响的器件,据此确定了采用的器件的类型;并根据模块的要求确定器件所需的指标,然后选择满足指标需求的器件。3.介绍了所采用的具体器件的主要参数,并据此进行了指标仿真计算和电路设计,给出各个分模块指标的理论分析和计算结果,再与实测指标进行对比分析。4.给出整个接收机的指标测试结果和产品的硬件图,并对测试结果进行了分析。5.分析了产品设计的不足之出,并对后续可以改进的地方进行了阐述。该接收机各项指标均满足指标要求,满足舰载雷达设备的性能及功能要求,并在结构体积和功耗等方面满足系统需求。按照该方案设计出的接收机已成功应用在舰载雷达上,发挥着重要的作用。
[Abstract]:The receiver is an important part of radar and communication system. It can obtain the most useful echo signal by preselection filtering, amplification, frequency conversion, filtering and demodulation, and filter out useless interference at the same time. The weak radio-frequency echo signal reflected or scattered by the target is transformed into a video or digital signal with sufficient amplitude to meet the requirements of signal processing. Ultra-heterodyne receiving technology is still the main technology to realize RF signal processing in electronic systems, and the key to realize its technical performance, especially in high performance electronic systems, such as phased array radar, broadband communication, ultra-wideband electronic countermeasures, etc. High performance, miniaturized, low-power receiver front end is the key technology of super heterodyne reception. The radar receiver studied and designed in this paper is L-band shipborne radar receiver. The receiver is based on the traditional superheterodyne receiver technology and combined with the current hardware conditions. The L-band radar receiver can meet the requirements of large dynamic, miniaturization and low power consumption, which is of great significance to the application and performance improvement of electronic systems. The main content of the thesis is: 1: 1. This paper expounds the basic theory of radar receiver, introduces several types of radar receiver, introduces in detail the general parameters and various indexes of the receiver, and explains the overall design and the design of each part of the receiver. Then, according to the basic principles and requirements of the receiver, the principle block diagram of the receiver is designed. According to the function, the receiver is divided into front-end part, if part and frequency synthesizer part, and the receiver index is split, and the technical index and realization mode of each module are determined. The types and characteristics of the main components of each sub-module are introduced respectively, especially the devices which have a significant impact on the module index, according to which the type of the devices used is determined, and the required indicators are determined according to the requirements of the modules. Then select the device. 3. 3. The main parameters of the specific device are introduced, and the simulation calculation and circuit design are carried out, the theoretical analysis and calculation results of each sub-module index are given, and the comparison with the measured index .4. The index test results of the whole receiver and the hardware diagram of the product are given, and the test results are analyzed. The shortcomings of product design are analyzed, and the following improvements are described. Each index of the receiver meets the requirements of the target, the performance and function of the shipborne radar equipment, and the system requirements in the aspects of structure volume and power consumption. The receiver designed according to this scheme has been successfully applied to shipborne radar and plays an important role.
【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】：TN957.5

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