本文選題：L波段 + 雷達(dá)接收機(jī)�。� 參考：《電子科技大學(xué)》2014年碩士論文

【摘要】：接收機(jī)是雷達(dá)和通信系統(tǒng)的重要組成部分,主要是通過(guò)預(yù)選濾波、放大、變頻、濾波和解調(diào)等方法,獲取最大限度的有用回波信號(hào),同時(shí)濾除無(wú)用干擾,將目標(biāo)反射或散射回的微弱射頻回波信號(hào)變成有足夠幅度的視頻或數(shù)字信號(hào),用以滿足信號(hào)處理的要求。超外差接收技術(shù)仍然是當(dāng)前電子系統(tǒng)實(shí)現(xiàn)射頻信號(hào)處理的主要技術(shù),是系統(tǒng)實(shí)現(xiàn)其技術(shù)性能的關(guān)鍵,特別在相控陣?yán)走_(dá)、寬帶通信、超寬帶電子對(duì)抗等高性能電子系統(tǒng)中,高性能、小型化、低功耗的接收前端是超外差接收的關(guān)鍵技術(shù)基礎(chǔ)。本文研究和設(shè)計(jì)的雷達(dá)接收機(jī)為L(zhǎng)波段的艦載雷達(dá)接收機(jī)。該接收機(jī)以傳統(tǒng)超外差接收機(jī)技術(shù)為基礎(chǔ),結(jié)合當(dāng)前硬件條件進(jìn)行了設(shè)計(jì)。該L波段雷達(dá)接收機(jī)滿足系統(tǒng)所要求的大動(dòng)態(tài)、小型化、低功耗等性能要求,對(duì)當(dāng)前電子系統(tǒng)的應(yīng)用和性能提高具有重要意義。論文主要內(nèi)容為:1.闡述了雷達(dá)接收機(jī)的基本理論,介紹了雷達(dá)接收機(jī)的幾種類型;并對(duì)接收機(jī)總體參數(shù)及各項(xiàng)指標(biāo)進(jìn)行了詳細(xì)介紹,同時(shí)對(duì)接收機(jī)總體設(shè)計(jì)和各部分設(shè)計(jì)進(jìn)行了說(shuō)明。然后根據(jù)接收機(jī)的基本原理和指標(biāo)要求設(shè)計(jì)出接收機(jī)的原理框圖。2.根據(jù)功能將接收機(jī)劃分為前端部分、中頻部分以及頻綜部分,并對(duì)接收機(jī)指標(biāo)進(jìn)行了拆分,確定了各個(gè)模塊的技術(shù)指標(biāo)和實(shí)現(xiàn)方式。3.分別介紹了各個(gè)分模塊主要器件的類型及其特點(diǎn),特別是對(duì)模塊指標(biāo)由重大影響的器件,據(jù)此確定了采用的器件的類型;并根據(jù)模塊的要求確定器件所需的指標(biāo),然后選擇滿足指標(biāo)需求的器件。3.介紹了所采用的具體器件的主要參數(shù),并據(jù)此進(jìn)行了指標(biāo)仿真計(jì)算和電路設(shè)計(jì),給出各個(gè)分模塊指標(biāo)的理論分析和計(jì)算結(jié)果,再與實(shí)測(cè)指標(biāo)進(jìn)行對(duì)比分析。4.給出整個(gè)接收機(jī)的指標(biāo)測(cè)試結(jié)果和產(chǎn)品的硬件圖,并對(duì)測(cè)試結(jié)果進(jìn)行了分析。5.分析了產(chǎn)品設(shè)計(jì)的不足之出,并對(duì)后續(xù)可以改進(jìn)的地方進(jìn)行了闡述。該接收機(jī)各項(xiàng)指標(biāo)均滿足指標(biāo)要求,滿足艦載雷達(dá)設(shè)備的性能及功能要求,并在結(jié)構(gòu)體積和功耗等方面滿足系統(tǒng)需求。按照該方案設(shè)計(jì)出的接收機(jī)已成功應(yīng)用在艦載雷達(dá)上,發(fā)揮著重要的作用。
[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.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN957.5

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 高峰;謝清玲;;雷達(dá)接收機(jī)的電磁兼容設(shè)計(jì)[J];火控雷達(dá)技術(shù);2006年04期

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本文編號(hào)：1955191