基于BiCMOS工艺的多模多标准发射机中E类功率放大器设计

发布时间：2018-03-19 12:18

本文选题：多模收发机　切入点：宽带功率放大器　出处：《东南大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着现代社会通信技术的发展,不断有新的通信标准被提出。一个优秀的移动通信设备不仅要满足新旧多种通信模式的要求,而且要具备强大的电池续航能力,尤其是便携式通信设备,这就对发射机中的功率放大器提出了更高的要求。因此,研究能够满足多种通信模式的高效率功率放大器具有重要意义。本文的理论部分阐述了功率放大器设计难点与挑战,同时针对多模多标准的要求,介绍了宽带功率放大器设计的常用技术,在高效率的方案上,给出了开关功率放大器D类,E类和F类功率放大器基本结构和工作原理,所设计的功率放大器的最终于采用E类结构,宽带E类功率放大器的负载变换网络设计直接影响到了功率放大器的性能,因此理论部分也重点分析了宽带E类功率放大器的负载变换网络。最终采用了差分有限电感负载网络设计了宽带E类功率放大器。该功率放大器采用0.13μmSiGeBiCMOS工艺,覆盖了 1.7GHz-2.7GHz的主流通信标准,满足了通信设备对多种通信模式的兼容能力。另一方面,设计的功率放大器工作在E类开关状态,同传统线性功率放大器相比效率得到明显提升,实现了设备的低功耗要求。功率放大器主体采用了两级差分结构,差分结构在减小寄生参数影响的同时也能够抑制输出的偶次谐波,提高功率放大器带宽性能。考虑到击穿电压影响,功率放大器的驱动级采用共源共栅结构。功率放大器的负载变换网络采用新颖的差分有限电感结构,不仅简化了电路而且提升功率放大器带宽和效率。设计中也采用了有耗匹配,匹配补偿等技术提升功率放大器整体性能。后仿真结果表明,在1.7G-2.7G的工作频带内,功率放大器无条件稳定,输入反射系数S11小于-11.OdB,匹配良好。输出功率大于27.6dBm,功率附加效率大于51.7%,功率增益大于22.6dB,满足多种应用的需求。本课题设计的功率放大器主要考虑多模多标准和高效率,应用的核心领域是低功耗便携通信设备。当然,在高线性度的应用场景中,可以采用包络消除与恢复等结构提升功率放大器整体的线性度来满足设备的要求。
[Abstract]:With the development of communication technology in modern society, new communication standards have been put forward. An excellent mobile communication equipment should not only meet the requirements of new and old communication modes, but also have strong battery life ability. Especially the portable communication equipment, which puts forward higher requirements for the power amplifier in the transmitter. It is of great significance to study the high efficiency power amplifier which can satisfy various communication modes. In the theoretical part of this paper, the design difficulties and challenges of power amplifier are expounded, and the requirements of multi-mode and multi-standard are also discussed. This paper introduces the common techniques in the design of wideband power amplifiers. On the basis of the high efficiency scheme, the basic structure and working principle of the switching power amplifiers D class E and F type power amplifiers are given. The class E structure of the power amplifier is adopted, and the load conversion network design of the wideband class E power amplifier has a direct impact on the performance of the power amplifier. Therefore, in the theoretical part, the load conversion network of the wideband class E power amplifier is also analyzed. Finally, the class E power amplifier is designed by using the differential finite inductance load network. The power amplifier adopts a 0.13 渭 mSiGeBiCMOS process. The main communication standard covering 1.7GHz to 2.7GHz satisfies the compatible capability of communication equipment for various communication modes. On the other hand, the designed power amplifier works in the switching state of Class E. the efficiency of the designed amplifier is significantly improved compared with the traditional linear power amplifier. The low power requirement of the equipment is realized. The main body of the power amplifier adopts two-stage differential substructure. The differential structure not only reduces the influence of parasitic parameters, but also inhibits the output even harmonics. Considering the influence of breakdown voltage, the drive stage of the power amplifier adopts a common source common-grid structure, and the load conversion network of the power amplifier adopts a novel differential finite inductance structure. It not only simplifies the circuit but also improves the bandwidth and efficiency of the power amplifier. The lossy matching and matching compensation techniques are also used to improve the overall performance of the power amplifier. The simulation results show that, in the working band of 1.7G-2.7G, The power amplifier is unconditionally stable, The input reflection coefficient S11 is less than -11.OdB, which matches well. The output power is more than 27.6dBm, the power additional efficiency is greater than 51.7dBand the power gain is more than 22.6dB. the power amplifier designed in this paper mainly considers multi-mode multi-standard and high efficiency. The core area of application is low power portable communication equipment. Of course, in high linearity application scenarios, envelope cancellation and recovery can be used to enhance the overall linearity of power amplifier to meet the requirements of the equipment.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN722.75

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