A Dual Power-Mode Multi-Band Power Amplifier With Envelope Tracking for Handset Applications
SCIE
SCOPUS
- Title
- A Dual Power-Mode Multi-Band Power Amplifier With Envelope Tracking for Handset Applications
- Authors
- Cho, Y; Kang, D; Kim, J; Kim, D; Park, B; Kim, B
- Date Issued
- 2013-04
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Abstract
- This paper presents a dual power-mode and multi-band power amplifier (PA) for handset applications that improves the efficiency in low-power regions. This PA operates in two modes through path control by a shunt switched capacitor. The proposed control method provides efficient mode control without any efficiency degrading and bandwidth (BW) limiting. The proposed PA, in conjunction with a boosted supply modulator for envelope tracking (ET) operation not only in the high-power mode, but also in the low-power mode, delivers good performance at all average output power levels. The linearity is improved by ET through a proper envelope-shaping method. For demonstrative purposes, the PA and supply modulator are implemented using an InGaP/GaAs heterojunction bipolar transistor and AIGaAs/InGaAs enhancement/depletion-mode pseudomorphic high electron-mobility transistor process and a 0.18-mu m CMOS process, respectively. The ET PA is tested across the range of 1.7-2.0 GHz using a long-term evolution signal with 16 quadrature amplitude modulation, a 7.5-dB peak-to-average power ratio, and 10-MHz BW. The proposed dual power-mode multi-band ET PA delivers good performance for high-and low-power modes, indicating that the architecture is promising for handset PA applications.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/27134
- DOI
- 10.1109/TMTT.2013.2250712
- ISSN
- 0018-9480
- Article Type
- Article
- Citation
- IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, vol. 61, no. 4, page. 1608 - 1619, 2013-04
- Files in This Item:
- There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.