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Highly Efficient Dual-Switch Hybrid Switching Supply Modulator for Envelope Tracking Power Amplifier SCIE SCOPUS
- Title
- Highly Efficient Dual-Switch Hybrid Switching Supply Modulator for Envelope Tracking Power Amplifier
- Authors
- Dongsu Kim; Daehyun Kang; Jooseung Kim; Yunsung Cho; Kim, B
- Date Issued
- 2012-06
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Abstract
- This letter describes a highly efficient dual-switch hybrid switching supply modulator for an envelope tracking power amplifier (PA). The supply modulator has a combined structure of a linear amplifier and a switching amplifier. For an improved efficiency, the switching amplifier employs two buck converters and realizes an adaptive slew rate control of the switching amplifier's current. An implemented envelope tracking PA delivers an efficiency of 39.1% at an output power of 27 dBm for long term evolution signal with 10 MHz channel bandwidth.
- Keywords
- Buck converter; envelope tracking; long term evolution (LTE); power amplifier (PA); supply modulator; EDGE
- ISSN
- 1531-1309
- Article Type
- Article
- Citation
- IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, vol. 22, no. 6, page. 285 - 287, 2012-06
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- 김범만KIM, BUM MAN
- Dept of Electrical Enginrg