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A high-power Cartesian feedback transmitter including a compact inverted Doherty amplifier
- Authors
- Cho, H[Cho, Hanjin]; Kim, MS[Kim, Min-su]; Jeong, JH[Jeong, Jong-hyuk]; Van, J[Van, Juho]; Jung, SC[Jung, Sung-chan]; Park, H[Park, Hyunchul]; Lim, KH[Lim, Kyung-hoon]; Kwon, SW[Kwon, Sung-wook]; Kim, JY[Kim, Jae Young]; Song, SC[Song, Sung Chan]; Park, CS[Park, Cheon-Seok]; Yang, Y[Yang, Youngoo]
- Issue Date
- Apr-2008
- Publisher
- JOHN WILEY & SONS INC
- Keywords
- Cartesian feedback transmitter; inverted Doherty amplifier; pi/4-DQPSK
- Citation
- MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, v.50, no.4, pp.944 - 946
- Indexed
- SCIE
SCOPUS
- Journal Title
- MICROWAVE AND OPTICAL TECHNOLOGY LETTERS
- Volume
- 50
- Number
- 4
- Start Page
- 944
- End Page
- 946
- ISSN
- 0895-2477
- Abstract
- A high-power Cartesian feedback transmitter including a compact inverted Doherty amplifier is presented. The system efficiency was further improved using a bias line adjustment method for the compact inverted Doherty amplifier. After the bias line adjustment from a lambda/4 line for the Doherty amplifier, a power-added efficiency, (PAE) of 69% points was improved from 41.3 to 48.2% at an output power level of 45 dBm. The whole Cartesian feedback transmitter system exhibited an efficiency of 40% and an adjacent channel leakage ratio of - 51 dBc at an output power of 45 dBm for 859 MHz band pi/4-DQPSK applications. (C) 2008 Wiley Periodicals. Inc.
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Related Researcher
- YANG, YOUNGOO
- Information and Communication Engineering (Electronic and Electrical Engineering)