290-GHz 17-dB ON-/OFF-Ratio Modulator With Resonance Control Varactors

Sungmook Lim, Hyunji Koo, Choul Young Kim, Jungsoo Kim, Jae Sung Rieh, Songcheol Hong

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


A 17-dB on-/off-ratio modulator operating at 290 GHz that switches resonance frequencies of a transmission line resonator with two varactors is presented for ultrashort-distance communication. The resonance frequency is altered by the control voltage of the varactors. The high on/off ratio can be achieved due to a simple resonance control of a transmission line resonator. High-speed modulation is possible due to a small RC time constant associated with a control voltage node. It is fabricated by using a 65-nm CMOS process with a cutoff frequency of 220 GHz. We demonstrated an insertion loss of 3.49 dB, an on/off ratio of 17 dB, a bandwidth of 28 GHz, and data rates as high as 11.3 Gb/s.

Original languageEnglish
Article number8584060
Pages (from-to)50-52
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Issue number1
Publication statusPublished - 2019 Jan

Bibliographical note

Funding Information:
Manuscript received October 24, 2018; accepted November 27, 2018. Date of publication December 20, 2018; date of current version January 8, 2019. This work was supported in part by the National Research Foundation of Korea through the Pioneer Research Center Program under Grant 2012-0009594, in part by the Center for Integrated Smart Sensors through the Global Frontier Project under Grant CISS-2012M3A6A6054195 funded by the Ministry of Science, ICT and Future Planning, and in part by the IC Design Education Center. (Corresponding author: Songcheol Hong.) S. Lim and S. Hong are with the School of Electrical Engineering and Computer Science, Korea Advanced Institute of Science and Technology, Daejeon 34141, South Korea (e-mail: smlim@kaist.ac.kr; schong@ee.kaist.ac.kr).

Publisher Copyright:
© 2018 IEEE.


  • Changing the resonance frequency
  • ON-OFF-keying (OOK) modulator
  • short-range communication

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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