数字微波通信系统室外单元微波模块设计

发布时间：2018-03-11 04:12

本文选题：微波通信　切入点：室外单元　出处：《武汉邮电科学研究院》2014年硕士论文　论文类型：学位论文

【摘要】：微波通信作为现代无线通信的先行者,一直在通信领域起着举足轻重的作用,是现代最重要的三大通信手段之一,具有通信容量大、建设速度快、质量稳定、通信可靠、维护方便、费用相对较低、易于跨越复杂地形的等优点。数字微波通信系统的室外单元是系统的重要组成部分,其性能直接影响整个微波链路的通信质量。本文结合公司项目指标完成了11GHz微波通信系统室外单元微波模块的设计,本文发射模块采用的是中频调制发射机结构,接收模块采用的是超外差式接收机结构,所设计的微波模块具有结构简单,性能优良,成本低,易于组装等优点。系统测试结果表明本文所设计的微波模块发射端输出频率范围为10695MHz-11175MHz,输出功率为22dBm,增益达到25dB以上,三阶交调指标优于40dBc,带内杂散优于65dBc。接收端输入频率范围为10695MHz-11175MHz,输出频率为2236Mttz,增益大于20dB,噪声系数指标优于3.5dB。文章的结尾,对当前电路中存在的问题作了分析,并提出了改进意见,为后续电路的研发提供了一些经验。
[Abstract]:As the forerunner of modern wireless communication, microwave communication has been playing an important role in the field of communication. It is one of the three most important modern communication means, with large communication capacity, fast construction speed, stable quality and reliable communication. The outdoor unit of digital microwave communication system is an important part of the system. Its performance directly affects the communication quality of the whole microwave link. The design of the outdoor microwave module of the 11GHz microwave communication system is completed in combination with the company's project index. The transmitter structure of the transmitter is adopted in this paper. The receiving module adopts the structure of superheterodyne receiver. The designed microwave module has the advantages of simple structure, excellent performance and low cost. The system test results show that the output frequency range of the microwave module designed in this paper is 10695MHz-11175MHz, the output power is 22dBmand the gain is more than 25dB. The third-order crossover index is better than 40dBc, and the in-band stray is better than 65dBc.The input frequency range of the receiver is 10695MHz-11175MHz, the output frequency is 2236Mttz. the gain is more than 20dBand the noise coefficient is better than 3.5dB.At the end of the paper, the problems existing in the current circuit are analyzed. Suggestions for improvement are put forward, which provide some experience for the research and development of subsequent circuits.
【学位授予单位】：武汉邮电科学研究院
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN925

【共引文献】