1024-QAM high image rejection E-Band sub-harmonic IQ modulator and transmitter in 65-nmCMOS process

Wei Heng Lin, Hong Yuan Yang, Jeng-Han Tsai, Tian Wei Huang, Huei Wang

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

An E-band high image-rejection sub-harmonic in-phase/quadrature (IQ) modulator for a high-order quadrature amplitude modulation (QAM) signal is designed and implemented on standard 65-nm CMOS technology. To maintain high image-rejection ratio of the IQ modulator over a wide bandwidth for high data-rate application, a load-insensitive analysis and a local oscillator (LO) broadband 45 power splitter are proposed to achieve low amplitude and phase imbalanced structure. In addition, the doubly balanced sub-harmonic Gilbert-cell mixer with the advantages of good LO leakage suppression has been selected in the mixer design. The IQ modulator demonstrates a measured flat conversion gain of 0 ±1 dB from 55 to 85 GHz. The image rejection ratio is better than 40 dBc from 64 to 84 GHz. For millimeter-wave communication applications, the IQ modulator is integrated with a four-stage power amplifier to form a direct-conversion transmitter. The measured conversion gain of the transmitter is 33 dB and the measured saturated power is 11 dBm. Via high image rejection and good LO suppression of the modulator, a 1024-QAM modulated signal with a data rate of 500 Mb/s and 1.7% error vector magnitude is successfully demonstrated at 65 GHz.

Original languageEnglish
Article number6637072
Pages (from-to)3974-3985
Number of pages12
JournalIEEE Transactions on Microwave Theory and Techniques
Volume61
Issue number11
DOIs
Publication statusPublished - 2013 Nov 25

Fingerprint

quadrature amplitude modulation
Quadrature amplitude modulation
quadratures
rejection
transmitters
Modulators
modulators
Transmitters
harmonics
Mixer circuits
oscillators
retarding
Phase structure
power amplifiers
Power amplifiers
Millimeter waves
millimeter waves
CMOS
leakage
communication

Keywords

  • 1024-QAM
  • CMOS
  • image rejection ratio (IRR)
  • millimeter wave (MMW)
  • sub-harmonic mixer

ASJC Scopus subject areas

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

1024-QAM high image rejection E-Band sub-harmonic IQ modulator and transmitter in 65-nmCMOS process. / Lin, Wei Heng; Yang, Hong Yuan; Tsai, Jeng-Han; Huang, Tian Wei; Wang, Huei.

In: IEEE Transactions on Microwave Theory and Techniques, Vol. 61, No. 11, 6637072, 25.11.2013, p. 3974-3985.

Research output: Contribution to journalArticle

Lin, Wei Heng ; Yang, Hong Yuan ; Tsai, Jeng-Han ; Huang, Tian Wei ; Wang, Huei. / 1024-QAM high image rejection E-Band sub-harmonic IQ modulator and transmitter in 65-nmCMOS process. In: IEEE Transactions on Microwave Theory and Techniques. 2013 ; Vol. 61, No. 11. pp. 3974-3985.
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