针对无线通信应用的射频功率放大器,提出了一种新颖的温度补偿电路。应用该温度补偿电路,设计了一款基于In Ga P/Ga As HBT工艺的两级F类功率放大器。该功率放大器采用了带温度补偿特性的有源偏置电路,能有效地提高线性度,补偿温度引起...针对无线通信应用的射频功率放大器,提出了一种新颖的温度补偿电路。应用该温度补偿电路,设计了一款基于In Ga P/Ga As HBT工艺的两级F类功率放大器。该功率放大器采用了带温度补偿特性的有源偏置电路,能有效地提高线性度,补偿温度引起的性能偏差;输出匹配网络采用F类功率放大器谐波理论而设计。在1 920~1 980 MHz频段和电源电压3.4 V条件下,测得常温状态该功率放大器增益为27 d B;输出功率在28 d Bm时功率附加效率达到42%,邻信道功率比为?36 d Bc;在?20℃~80℃之间功率附加效率和邻信道功率比基本不变。展开更多
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
文摘针对无线通信应用的射频功率放大器,提出了一种新颖的温度补偿电路。应用该温度补偿电路,设计了一款基于In Ga P/Ga As HBT工艺的两级F类功率放大器。该功率放大器采用了带温度补偿特性的有源偏置电路,能有效地提高线性度,补偿温度引起的性能偏差;输出匹配网络采用F类功率放大器谐波理论而设计。在1 920~1 980 MHz频段和电源电压3.4 V条件下,测得常温状态该功率放大器增益为27 d B;输出功率在28 d Bm时功率附加效率达到42%,邻信道功率比为?36 d Bc;在?20℃~80℃之间功率附加效率和邻信道功率比基本不变。
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.
