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


  • 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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