Design of a tunable LNA and its variability analysis through surrogate modeling

Xhesila Xhafa, Mustafa Berke Yelten*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


In this paper, a tunable low noise amplifier (LNA), which provides a bandwidth of 1 GHz, has been designed. The tunability of the LNA has been achieved by employing MOS varactors in accumulation mode. A shift in the LNA performance has been observed with the change in the total capacitance of the varactors through the control voltage. Starting from 2 to 3 GHz, the proposed tunable LNA provides a noise figure (NF) of less than 3 dB, a voltage gain of 12 dB and higher, while maintaining input and output power matching (S11 and S22) metrics at least below −12 dB. The total power consumption of the circuit is 23 mW. Moreover, two case studies that demonstrate the usage of surrogate modeling in RF circuit design have been described. Three- and six-dimensional surrogate models have been built to illustrate the effect of bondwires on the variability of several LNA design metrics.

Original languageEnglish
Article numbere2724
JournalInternational Journal of Numerical Modelling: Electronic Networks, Devices and Fields
Issue number6
Publication statusPublished - 1 Nov 2020

Bibliographical note

Publisher Copyright:
© 2020 John Wiley & Sons, Ltd


  • low noise amplifier
  • MOS varactor
  • SUMO toolbox
  • surrogate modeling
  • tunability
  • wirebonding


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