【摘要】：微波變頻器廣泛應(yīng)用于微波通信、雷達(dá)系統(tǒng)、遙測遙感、導(dǎo)航系統(tǒng)、偵察和電子對抗等領(lǐng)域,是現(xiàn)在通信系統(tǒng)的核心部分。由于衛(wèi)星通信的快速發(fā)展,射頻前端電路的集成度越來越高,功能也越來越多,單一模塊的變頻器已經(jīng)不能滿足通信行業(yè)發(fā)展的需要,有時(shí)一個(gè)系統(tǒng)需要多路變頻通道才能滿足需求,隨著設(shè)備小型化和集成化的發(fā)展,這就需要將多個(gè)變頻通道集成在一個(gè)機(jī)箱內(nèi),因此一體化多通道變頻器是個(gè)非常值得研究的課題。本文主要是對一體化多通道變頻器進(jìn)行研究,為微波通信提供一個(gè)具有通用性、實(shí)用性和高可靠性的微波變頻設(shè)備。該變頻器共用一個(gè)機(jī)箱,一個(gè)電源,一個(gè)時(shí)鐘模塊和一個(gè)主控模塊;并且每個(gè)變頻模塊相互獨(dú)立、互不影響可以單獨(dú)工作和關(guān)閉,變頻模塊也支持盲拔插,可以隨時(shí)取出或更換,因此大大減小了設(shè)備的體積,節(jié)約了成本,也方便了用戶的使用和日后的維護(hù)。論文主要開展了以下研究工作:1.本文首先介紹了微波變頻器的發(fā)展?fàn)顩r;又介紹了微波變頻器的主要的技術(shù)指標(biāo)、鎖相環(huán)的基本理論、設(shè)計(jì)鎖相頻率合成器的常用方法以及微波變頻器的常用結(jié)構(gòu)并分析了每種結(jié)構(gòu)的優(yōu)缺點(diǎn)。2.根據(jù)技術(shù)要求,對多通道變頻器進(jìn)行設(shè)計(jì),主要包括以下幾個(gè)方面:系統(tǒng)組成框圖和原理,系統(tǒng)結(jié)構(gòu)設(shè)計(jì),S頻段下變頻模塊設(shè)計(jì),時(shí)鐘單元設(shè)計(jì),電源模塊設(shè)計(jì),控制單元設(shè)計(jì)以及系統(tǒng)的可靠性和可維護(hù)性設(shè)計(jì)。其中主要講述了S頻段下變頻模塊的設(shè)計(jì),根據(jù)技術(shù)要求,經(jīng)過分析,S頻段下變頻模塊采用超外差式下變頻結(jié)構(gòu);根據(jù)選用的下變頻結(jié)構(gòu)和主要的技術(shù)指標(biāo)要求,確定了變頻通道的設(shè)計(jì)方案、本振的設(shè)計(jì)方案和自檢功能的設(shè)計(jì)方案,并進(jìn)行了電路仿真和優(yōu)化。3.本文也著重介紹了關(guān)鍵器件的選擇,并對器件的性能進(jìn)行了分析。最后對設(shè)計(jì)完成的設(shè)備進(jìn)行測試并記錄測試結(jié)果,將測試結(jié)果和標(biāo)準(zhǔn)要求的技術(shù)指標(biāo)進(jìn)行對比和分析,經(jīng)過對比,最終的測試結(jié)果滿足設(shè)計(jì)指標(biāo)要求。
[Abstract]:Microwave inverter is widely used in microwave communication, radar system, telemetry and remote sensing, navigation system, reconnaissance and electronic countermeasure, etc. It is the core part of the current communication system. Due to the rapid development of satellite communication, the integration of RF front-end circuits is getting higher and higher, and the functions of RF front-end circuits are more and more. The frequency converter of single module can not meet the needs of the development of communication industry. Sometimes a system needs multi-channel frequency conversion channels to meet the requirements. With the development of miniaturization and integration of equipment, it is necessary to integrate multiple frequency conversion channels into one chassis. Therefore, the integration of multi-channel inverter is a very worthy subject to be studied. In this paper, the integrated multi-channel inverter is studied to provide a universal, practical and reliable microwave frequency conversion equipment for microwave communication. The frequency converter share a chassis, a power supply, a clock module and a master control module; And each frequency conversion module is independent of each other, and can work and close separately without affecting. The frequency conversion module also supports blind plug-in and can be removed or replaced at any time, thus greatly reducing the volume of the equipment and saving the cost. It also facilitates the user's use and future maintenance. This paper mainly carried out the following research work: 1. Firstly, this paper introduces the development of microwave frequency converter. The main technical indexes of microwave frequency converter, the basic theory of phase locked loop, the common methods of designing phase locked frequency synthesizer and the common structure of microwave frequency converter are also introduced, and the advantages and disadvantages of each structure are analyzed. According to the technical requirements, the multi-channel inverter is designed, which mainly includes the following aspects: system composition block diagram and principle, system structure design, S-band down-conversion module design, clock unit design, power module design, and so on. Control unit design and system reliability and maintainability design. The design of S-band down-conversion module is mainly described. According to the technical requirements, the S-band down-conversion module adopts super-heterodyne down-conversion structure. According to the selected down conversion structure and the main technical requirements, the design scheme of the frequency conversion channel, the design scheme of the local vibration and the design scheme of the self test function are determined, and the circuit simulation and optimization are carried out. 3. This paper also focuses on the selection of key devices, and analyzes the performance of the devices. Finally, the designed equipment is tested and the test results are recorded. The test results are compared and analyzed with the technical indexes required by the standard. Through the comparison, the final test results meet the requirements of the design indicators.
【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】：2015
【分類號(hào)】：TN773

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本文編號(hào)：2461586