X波段20 W高效率负载调制平衡放大器MMIC  

X-band 20W High-efficiency Load Modulated Balanced Amplifier MMIC

作　　者：印政 陶洪琪[1] YIN Zheng;TAO Hongqi(Science and Technology on Monolithic Integrated Circuits and Modules Laboratory,Nanjing Electronic Devices Institutey Nanjing,210016,CHN)

机构地区：[1]南京电子器件研究所,微波毫米波单片集成和模块电路重点实验室,南京210016

出　　处：《固体电子学研究与进展》2022年第1期5-9,21,共6页Research & Progress of SSE

摘　　要：报道了一款采用0.25μm GaN HEMT工艺的8~12 GHz高效率负载调制平衡放大器(Load-modulated balanced amplifier,LMBA)。高峰均比信号传输场景中,功率放大器的效率性能会在输出功率回退区间内急剧恶化。基于LMBA技术,结合有源负载调制与预匹配输出结构,有效提高了功放在输出功率回退区间的效率。在连续波测试条件下,该芯片在8~12 GHz频段内,饱和输出功率为43.2~43.8 dBm,饱和效率为50.5%~55.7%。饱和输出功率回退6 dB时,效率为40.2%~44.5%,相较于归一化理想B类功率放大器具有15%~17%的效率提升。An 8-12 GHz high-efficiency load-modulated balanced amplifier(LMBA)utilizing 0.25 fjtm GaN HEMT process was presented.In the scenario of signal transmission with high peak-to-average power ratio(PAPR),the efficiency of power amplifier(PA)at power back-off(PBO)tends to degrade sharply.Based on the LMBA technique,the drain efficiency(DE)of proposed PA at the power back-off region was effectively enhanced with the help of active load modulation and pre-match-ing output networks.

关 键 词：负载调制 单片微波集成电路 氮化镓 高效率 

分 类 号：TN492[电子电信—微电子学与固体电子学] TN722.7.5