A novel 2-Dimensional correction method for mm-Wave Cartesian I/Q Modulators

M. Neofytou, P. Athanasiadis, M. Ganzerli, M. Lont, G.I. Radulov, Kostas Doris

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Abstract

This paper proposes a self-corrected In-phase/Quadrature-phase (I/Q) digital Cartesian modulator. The modulator is comprised of double balanced Gilbert cells to mitigate code dependent input and output impedances. Transistor-level simulations in 28 nm bulk CMOS demonstrate a static error vector magnitude (EVM) of −35 dB at 79 GHz carrier while providing 9.5 dBm peak output power with ~19% drain efficiency. Transistor level analysis shows that the linearity is limited by the transconductance (gm) I and Q input code dependency. To address this dependency a self-contained 2-dimensional correction technique is proposed. The proposed correction method improves the EVM from −35 dB to −42.5 dB without compromising the output power, power efficiency and occupied silicon area. The proposed solution enables linear and power efficient transmitters (TXs) for mm-Wave applications.
Original languageEnglish
Title of host publication2021 IEEE International Symposium on Circuits and Systems, ISCAS 2021 - Proceedings
PublisherIEEE/LEOS
Number of pages5
ISBN (Electronic)9781728192017
ISBN (Print)978-1-7281-9202-4
DOIs
Publication statusPublished - 27 Apr 2021
Event2021 IEEE International Symposium on Circuits and Systems (ISCAS 2021) - VIRTUAL, Daegu, Korea, Republic of
Duration: 22 May 202128 May 2021

Conference

Conference2021 IEEE International Symposium on Circuits and Systems (ISCAS 2021)
CountryKorea, Republic of
CityDaegu
Period22/05/2128/05/21

Keywords

  • Wireless communication
  • Transmitters
  • Modulation
  • Linearity
  • Topology
  • Transistors
  • Power generation

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