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本文提出一种双发射机数字包络跟踪供电调制器，支持200MHz信道带宽和93.6%效率，适用于2G/3G/LTE/NR标准。解决了5G NR中高带宽连续载波聚合下射频功率放大器功耗大的问题。
Younghwan Choo, Seungchan Park, Young-Ho Jung, Jae-Young Ko, Takahiro Nomiyama, Jongbeom Baek, Jaeyeol Han, Sang-Han Lee, Ik-Hwan Kim, Ji-Seon Paek, Jongwoo Lee, Thomas Byunghak Cho Samsung Electronics, Hwaseong, Korea *Equally Credited Authors (ECAs) Envelope tracking (ET) has become essential technology to save power consumption of RF power amplifiers (PAs) in mobile handsets. 5G NR standard continuously increases their maximum channel bandwidth (CH BW) for intra-band contiguous carrier aggregation (CA) to improve data rate. 3GPP TS 38.101 (Release 16) introduces maximum aggregated BW cases of 200MHz (CA_n77C, CA_n78C, CA_n79C), 300MHz (CA_n77D, CA_n78D, CA_n79D) and even 320MHz (CA_n46E) [1]. However, the CH BWs that can be supported by conventional analog ET supply modulators, composed of a switching amplifier and an analog linear amplifier, almost reach their limit due to large PA decoupling capacitor (few hundreds of pF) and high-voltage process (>5V). The
Jun-Suk Bang*, Dongsu Kim*, Jeongkwang Lee, Sungyoub Jung,