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Dual‐band feedforward linear power amplifier for digital cellular and IMT‐2000 base‐station
Author(s) -
Choi Heungjae,
Jeong Yongchae,
Kenney J. S.,
Kim Chul Dong
Publication year - 2009
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.24198
Subject(s) - intermodulation , amplifier , feed forward , multi band device , adjacent channel , electrical engineering , electronic engineering , microwave , engineering , predistortion , base station , bandwidth (computing) , telecommunications , control engineering , antenna (radio)
This article presents the design of a novel dual‐band signal cancellation circuit and its application to feedforward linear power amplifier. Intermodulation distortion cancellation loop shows 20.45 dB and 25.04 dB suppression for digital cellular band and IMT‐2000 band, respectively, over a correction bandwidth of 100 MHz. From the adjacent channel leakage ratio measurement, 16.5 dB and 18.6 dB improvements are achieved for each band under simultaneous operation. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 922–926, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24198