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Linearity improvement of 5.2‐GHz CMOS up‐conversion mixer for wireless applications
Author(s) -
Murad S. A. Z.,
Shahimin M. Mohamad,
Pokharel R. K.,
Kanaya H.,
Yoshida K.
Publication year - 2012
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.26711
Subject(s) - linearity , frequency mixer , cmos , gilbert cell , microwave , electronic mixer , dbm , electrical engineering , engineering , electronic engineering , inductor , radio frequency , harmonic mixer , telecommunications , voltage , noise figure , amplifier , local oscillator
This letter presents linearity improvement up‐conversion mixer at 5.2 GHz for wireless applications. The design is based on Gilbert‐cell active double‐balanced mixer using derivative superposition method for linearity improvement. The design improvement is proposed in TSMC 0.18‐μm CMOS process. The linearity of the designed mixer is further improved using source degeneration inductors at transconductors stage. The measurement results indicate that the proposed method shows the third‐order intercept point (IIP3) of 13.5‐dBm, which is higher than previously published mixers. The mixer achieves the conversion gain of 2 dBm, and consumes 3.0 mA at 1.8 V power supply. The size of the whole chip is 0.56 mm 2 . © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:923–925, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26711