Seung-Chul Lee, Ji-Seon Paek, Jun-Hee Jung, Yong-Sik Youn, Sung-Jun Lee, Min-Soo Cho, JaeKwang Han, JungBum Choi, Yong-Whan Joo, Takahiro Nomiyama, Su-Ho Lee, I. Sohn, T. Cho, Byeong-ha Park, Inyup Kang
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引用次数: 25
Abstract
Envelope tracking (ET) prolongs the battery life by modulating the supply of a power amplifier (PA) according to the signal envelope. With this emerging technology, the PA efficiency is greatly improved, whereas the supply modulator (SM) itself needs to provide efficient and accurate envelope tracking for the overall performance of the SM-PA combined system (PA module). The ET technique, meanwhile, has seen limited use in high-power transmission due to the reduced SM efficiency for low output power originating from the linear stage in hybrid structures [1].
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