A 300-GHz 64-QAM CMOS transmitter with 21-Gb/s maximum per-channel data rate

Kyoya Takano, Kosuke Katayama, Shuhei Amakawa, Takeshi Yoshida, Minoru Fujishima

Research output: Chapter in Book/Report/Conference proceedingConference contribution

12 Citations (Scopus)

Abstract

A 300-GHz CMOS transmitter that covers the vast unallocated frequency band above 275 GHz with six channels has recently been reported. It employed a tripler-based subharmonic mixer called the cubic mixer. However, the maximum perchannel data rate was limited to 17.5 Gb/s with 32 QAM because of the interference between the desired signal and the unwanted image signals at approximately 300 GHz, originating from an image of the second intermediate frequency signal, IF2, at around 100 GHz. In this study, we show that the image signals at around 300 GHz can be reduced significantly by using a set of LO frequencies different from that used previously, without impacting the allocation of the six channels. This is accomplished because the image of IF2 is driven out-of-band of the IF amplifier for IF2. As a result, the maximum per-channel data rate reached 21 Gb/s with 64 QAM. The aggregate data rate over six channels is 123 Gb/s.

Original languageEnglish
Title of host publicationEuMIC 2016 - 11th European Microwave Integrated Circuits Conference
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages193-196
Number of pages4
ISBN (Electronic)9782874870446
DOIs
Publication statusPublished - 2016 Dec 7
Externally publishedYes
Event11th European Microwave Integrated Circuits Conference, EuMIC 2016 - London, United Kingdom
Duration: 2016 Oct 32016 Oct 4

Other

Other11th European Microwave Integrated Circuits Conference, EuMIC 2016
CountryUnited Kingdom
CityLondon
Period16/10/316/10/4

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Keywords

  • CMOS transmitter
  • cubic mixer
  • image reduction
  • QAM
  • THz

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Instrumentation

Cite this

Takano, K., Katayama, K., Amakawa, S., Yoshida, T., & Fujishima, M. (2016). A 300-GHz 64-QAM CMOS transmitter with 21-Gb/s maximum per-channel data rate. In EuMIC 2016 - 11th European Microwave Integrated Circuits Conference (pp. 193-196). [7777523] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/EuMIC.2016.7777523