865-880MHz功率放大器的研究与设计
发布时间：2018-08-13 20:12
【摘要】：无论是在无线通信系统、卫星导航系统，还是军用雷达和电子对抗系统中，射频功率放大器都是核心部件之一，它包含了一个系统的许多重要关键技术，占据了高达约30%的设备成本，因此对功率放大器展开研究有着重要的意义。宽带化、高线性度和高效率是未来功率放大器研究发展的重点，由于CDMA系统采用的是变包络数字调制技术，使得系统对线性度的要求更加严格了。 本文的课题来源于CDMA直放站对低成本、高线性功率放大器的需求，目标是设计一款工作在865~880MHz频段，额定输出功率为16W（约42dBm）的线性功率放大器，线性度是本设计重点考量的对象。由于功率放大器同一般的小信号放大器件相比工作在大信号状态下，因此设计难度会较大。 本文首先介绍了功率放大器的研究意义和发展现状，，紧接着第二章讲述了射频功率放大器设计需要具备的基本理论基础，包括常见的功率放大器分类及工作特性，功率放大器的常用技术指标，对功率放大器稳定性做出了分析解释，对功率放大器的偏置电路、匹配电路做出了详尽的理论分析和设计方法总结；第三章则根据设计要求，具体给出了功率放大器的设计流程，包括静态工作点的选取及偏置电路设计，稳定性分析，最佳负载和源阻抗牵引仿真选取及相应的匹配电路设计，并对设计完成的单管功率放大器进行了小信号S参数仿真和大信号非线性特性仿真，然后由设计好的单管放大器完成双管平衡功率放大器设计并进行了仿真比较，最后给出了版图设计，对单端功放和双管平衡功放进行比较分析设计是本文的创新点；第四章则对最终电路进行了调试过程，测试了关键射频指标。 经过最终测试，在865~880MHz工作频段，当输出功率达到额定值42dBm时，末级增益为20.66dB，带内波动为0.84dB，端口驻波比都在1.3以下，三阶互调值为-49.18dBc，二次谐波和三次谐波失真分别为-59.52dBc和-81.59dBc，满足设计要求。
[Abstract]:Radio frequency power amplifier is one of the core components in wireless communication system, satellite navigation system, military radar and electronic countermeasure system. It contains many important key technologies of a system. It accounts for up to 30% of the equipment cost, so it is very important to study the power amplifier. Wideband, high linearity and high efficiency are the key points in the future research and development of power amplifiers. Because the CDMA system adopts variable envelope digital modulation technology, the requirement of linearity is more stringent. This paper comes from the demand of CDMA repeater for low cost and high linear power amplifier. The goal is to design a linear power amplifier with rated output power of 16W (about 16W) working in 865~880MHz band. Linearity is the focus of this design. Because the power amplifier works in the large signal state compared with the common small signal amplifier, it will be more difficult to design. This paper first introduces the research significance and development status of power amplifier, then the second chapter describes the basic theoretical basis of RF power amplifier design, including the common power amplifier classification and working characteristics. The common technical indexes of power amplifier are analyzed and explained, the bias circuit and matching circuit of power amplifier are analyzed in detail, and the design methods are summarized. The design flow of the power amplifier is given, including the selection of the static working point and the design of the bias circuit, the stability analysis, the simulation selection of the optimal load and source impedance, and the corresponding matching circuit design. The small signal S parameter simulation and the large signal nonlinear characteristic simulation of the designed single transistor power amplifier are carried out, and then the double tube balanced power amplifier is designed by the designed single tube amplifier and the simulation comparison is carried out. Finally, the layout design is given, and the comparative analysis and design of single end power amplifier and double tube balanced power amplifier is the innovation of this paper. Chapter 4 is the debugging process of the final circuit, and the key radio frequency index is tested. After the final test, when the output power reaches the rated 42dBm, the final gain is 20.66 dB, the in-band fluctuation is 0.84 dB, and the VSWR of the port is less than 1.3, in the 865~880MHz operating frequency band, when the output power reaches the rated 42dBm, the final stage gain is 20.66 dB, the in-band fluctuation is 0.84dB. The third order intermodulation value is -49.18 dBc, the second harmonic and the third harmonic distortion are -59.52 dBc and -81.59 dBc, respectively, which meet the design requirements.
【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】：2015
【分类号】：TN722.75
本文编号：2182055
[Abstract]:Radio frequency power amplifier is one of the core components in wireless communication system, satellite navigation system, military radar and electronic countermeasure system. It contains many important key technologies of a system. It accounts for up to 30% of the equipment cost, so it is very important to study the power amplifier. Wideband, high linearity and high efficiency are the key points in the future research and development of power amplifiers. Because the CDMA system adopts variable envelope digital modulation technology, the requirement of linearity is more stringent. This paper comes from the demand of CDMA repeater for low cost and high linear power amplifier. The goal is to design a linear power amplifier with rated output power of 16W (about 16W) working in 865~880MHz band. Linearity is the focus of this design. Because the power amplifier works in the large signal state compared with the common small signal amplifier, it will be more difficult to design. This paper first introduces the research significance and development status of power amplifier, then the second chapter describes the basic theoretical basis of RF power amplifier design, including the common power amplifier classification and working characteristics. The common technical indexes of power amplifier are analyzed and explained, the bias circuit and matching circuit of power amplifier are analyzed in detail, and the design methods are summarized. The design flow of the power amplifier is given, including the selection of the static working point and the design of the bias circuit, the stability analysis, the simulation selection of the optimal load and source impedance, and the corresponding matching circuit design. The small signal S parameter simulation and the large signal nonlinear characteristic simulation of the designed single transistor power amplifier are carried out, and then the double tube balanced power amplifier is designed by the designed single tube amplifier and the simulation comparison is carried out. Finally, the layout design is given, and the comparative analysis and design of single end power amplifier and double tube balanced power amplifier is the innovation of this paper. Chapter 4 is the debugging process of the final circuit, and the key radio frequency index is tested. After the final test, when the output power reaches the rated 42dBm, the final gain is 20.66 dB, the in-band fluctuation is 0.84 dB, and the VSWR of the port is less than 1.3, in the 865~880MHz operating frequency band, when the output power reaches the rated 42dBm, the final stage gain is 20.66 dB, the in-band fluctuation is 0.84dB. The third order intermodulation value is -49.18 dBc, the second harmonic and the third harmonic distortion are -59.52 dBc and -81.59 dBc, respectively, which meet the design requirements.
【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】：2015
【分类号】：TN722.75
【参考文献】
相关期刊论文 前10条
1 罗希;刘永强;蔡树军;;采用功率测量负载牵引的阻抗匹配方法[J];半导体技术;2008年10期
2 吴家锋;何庆国;赵夕彬;;基于负载牵引法的小型化功率模块设计[J];半导体技术;2009年06期
3 黄清华;郝明丽;王宇晨;张宗楠;刘训春;;UHF平衡式宽带20W功率放大器[J];半导体学报;2008年02期
4 郝国欣;金燕波;郭华民;张培哲;;大功率宽带射频脉冲功率放大器设计[J];电子技术应用;2006年03期
5 邓宏贵;曹祥;罗安;曹建;;AB类功率放大器的设计与仿真研究[J];光电子技术;2005年04期
6 吕剑锋,孙虹;射频功率放大器的稳定性分析[J];国外电子测量技术;2005年03期
7 陈会;张玉兴;;基于多谐波双向牵引技术的微波功率放大器设计[J];微波学报;2008年03期
8 张羽,游佰强;前馈功率放大器的仿真设计[J];现代电子技术;2005年20期
9 梁晓芳;;X波段固态功率放大器稳定性分析设计[J];现代雷达;2007年12期
10 张玉霞,张洪立,肖军鹏,许家栋;前馈功放线性化技术的研究[J];遥测遥控;2005年01期
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