2-Tx Digital Envelope-Tracking Supply Modulator Achieving 200MHz Channel Bandwidth and 93.6% Efficiency for 2G/3G/LTE/NR RF Power Amplifiers
2-Tx Digital Envelope-Tracking Supply Modulator Achieving 200MHz Channel Bandwidth and 93.6% Efficiency for 2G/3G/LTE/NR RF Power Amplifiers
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2-Tx%20数字%20包络跟踪%20供应%20调制器%20实现%20200MHz%20通道%20带宽%20和%2093.6%%20效率%20用于%202G/3G/LTE/NR%20RF%20功率%20放大器
DOI：
10.1109/isscc42614.2022.9731655
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
T. B. Cho
中科院分区：
文献类型：
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作者：
Jun;Dongsu Kim;Jeongkwan Lee;Sung;Younghwan Choo;Seungchan Park;Young;Jaehong Ko;Takahiro Norniyama;Jongbeom Baek;Jae;Sang;Ik;Ji;Jongwoo Lee;T. B. Cho
包络跟踪（ET）已成为移动的手机中节省RF功率放大器（PA）功耗的关键技术。5G NR标准不断增加其用于带内连续载波聚合（CA）的最大信道带宽（CH BW）以提高数据速率。3GPP TS 38.101（版本16）引入了200MHz（CA_n77C、CA_n78C、CA_n79C）、300MHz（CA_n77D、CA_n78D、CA_n79D）以及甚至320MHz（CA_n46E）的最大聚合BW情况[1]。然而，由开关放大器和模拟线性放大器组成的传统模拟ET电源调制器所能支持的CH BW几乎达到其极限，这是由于大PA去耦电容（几百pF）和高压工艺（>5V）。[3]中的电源调制器（SM）通过开关隔离未使用PA的去耦电容，[5]中的线性放大器部分采用低压器件以实现更宽的带宽，然而，130MHz仍然是具有高输出电压（4至5V）的电源调制器中最宽的跟踪带宽。
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), 300M Hz (CA_n77D, CA_n78D, CA_n79D) and even 320M Hz (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 supply modulator (SM) in [3] isolates decoupling capacitors of unused PAs by a switch, and the linear amplifier in [5] partially employs low-voltage devices to achieve wider BW, however, still 130MHz is the widest envelope-tracking BW among supply modulators with high output voltage (4 to 5V).