This paper presents a brief overview of several promising design technologies for high efficiency silicon-based radio frequency （RF） power amplifiers （PAs） as well as the use of these technologies in mobile broadb...This paper presents a brief overview of several promising design technologies for high efficiency silicon-based radio frequency （RF） power amplifiers （PAs） as well as the use of these technologies in mobile broadband wireless communications. Four important aspects of PA design are addressed in this paper. First, we look at class-E PA design equations and provide an example of a class-E PA that achieves efficiency of 65-70% at 2.4 GHz. Then, we discuss state-of-the-art envelope tracking （ET） design for monolithic wideband RF mobile transmitter applications. A brief overview of Doherty PA design for the next-generation wireless handset applications is then given. Towards the end of the paper, we discuss an inherently broadband and highly efficient class-J PA design targeting future multi-band multi-standard wireless communication protocols.展开更多
针对未来无线通信系统中的宽带和效率问题,设计了一种宽带高效率的J类功率放大器。为了减少谐波阻抗对效率的影响,该J类功率放大器在输出匹配网络中采用了谐波控制单元,并通过对晶体管模型的简化,综合出一种较好的匹配网络。另外,在输...针对未来无线通信系统中的宽带和效率问题,设计了一种宽带高效率的J类功率放大器。为了减少谐波阻抗对效率的影响,该J类功率放大器在输出匹配网络中采用了谐波控制单元,并通过对晶体管模型的简化,综合出一种较好的匹配网络。另外,在输入匹配网络中,使用了具有宽带效应的混合集中和分布元件的π形匹配网络。设计中使用10 W GaN HEMT晶体管对理论进行验证,测试结果显示,在2.2 GHz～2.8 GHz之间的频带内,J类功率放大器的漏极效率大于61%,增益大于10.4 dB。该J类功率放大器在下一代无线通信系统中具有良好的应用前景。展开更多
文摘This paper presents a brief overview of several promising design technologies for high efficiency silicon-based radio frequency （RF） power amplifiers （PAs） as well as the use of these technologies in mobile broadband wireless communications. Four important aspects of PA design are addressed in this paper. First, we look at class-E PA design equations and provide an example of a class-E PA that achieves efficiency of 65-70% at 2.4 GHz. Then, we discuss state-of-the-art envelope tracking （ET） design for monolithic wideband RF mobile transmitter applications. A brief overview of Doherty PA design for the next-generation wireless handset applications is then given. Towards the end of the paper, we discuss an inherently broadband and highly efficient class-J PA design targeting future multi-band multi-standard wireless communication protocols.
文摘针对未来无线通信系统中的宽带和效率问题,设计了一种宽带高效率的J类功率放大器。为了减少谐波阻抗对效率的影响,该J类功率放大器在输出匹配网络中采用了谐波控制单元,并通过对晶体管模型的简化,综合出一种较好的匹配网络。另外,在输入匹配网络中,使用了具有宽带效应的混合集中和分布元件的π形匹配网络。设计中使用10 W GaN HEMT晶体管对理论进行验证,测试结果显示,在2.2 GHz～2.8 GHz之间的频带内,J类功率放大器的漏极效率大于61%,增益大于10.4 dB。该J类功率放大器在下一代无线通信系统中具有良好的应用前景。
