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

Xhafa X., Yelten M. B.

INTERNATIONAL JOURNAL OF NUMERICAL MODELLING-ELECTRONIC NETWORKS DEVICES AND FIELDS, vol.33, no.6, 2020 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 33 Issue: 6
  • Publication Date: 2020
  • Doi Number: 10.1002/jnm.2724
  • Journal Name: INTERNATIONAL JOURNAL OF NUMERICAL MODELLING-ELECTRONIC NETWORKS DEVICES AND FIELDS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Applied Science & Technology Source, Communication Abstracts, Compendex, INSPEC, Metadex, zbMATH, DIALNET, Civil Engineering Abstracts
  • Keywords: low noise amplifier, MOS varactor, SUMO toolbox, surrogate modeling, tunability, wirebonding, NOISE, CIRCUITS
  • Istanbul Technical University Affiliated: Yes

Abstract

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 (S-11 and S-22) 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.