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Linearity improvement analysis for power amplifiers at mm‐wave frequencies
Author(s) -
Valliarampath Joe,
Sinha Saurabh
Publication year - 2014
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.28172
Subject(s) - predistortion , intermodulation , amplifier , linearity , linearization , dbm , electronic engineering , microwave , extremely high frequency , electrical engineering , power (physics) , nonlinear distortion , distortion (music) , engineering , materials science , physics , telecommunications , cmos , nonlinear system , quantum mechanics
This article presents an adaptive predistortion (APD) linearization technique to improve the linearity of millimeter‐wave power amplifiers (PAs), specifically at 60 GHz. The PA and the APD were designed using the 0.13 µm SiGe BiCMOS process. The predistortion is applied to the PA by varying the gain of the PA through its variable gain amplifier. The PA achieves a P SAT of 11.97 dBm and I P 1 d Bof −10 dBm. After linearization the PA has an improved I P 1 d Bof −6 dBm. This linearization technique results in an optimum intermodulation distortion 3rd reduction of 10 dB. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:743–748, 2014