A 26GHz CMOS 3× Subharmonic Mixer with a Fundamental Frequency Rejection Technique

Hyo Sung Lee, Jonghoon Myeong, Byung Wook Min

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1 Citation (Scopus)


A 26GHz up-conversion 3× sub-harmonic mixer is designed using a 65 nm CMOS process. The reasons for the lack of research on the 3× subharmonic mixer are investigated and a solution called a fundamental frequency rejection technique is presented. The fundamental frequency rejection technique allows the cancellation of the fundamental LO and boosting of the third-order harmonic. The proposed 3× subharmonic mixer consists of an octet-phase generator, 3× subharmonic mixer core, output transformer balun, and LO buffers. The octet-phase generator, which consists of a transformer balun and a two-stage polyphase filter, provides the 8-phase LO for the fundamental frequency rejection technique. The mixer core consists of three Gilbert-cell active sub-mixers to implement the fundamental frequency rejection technique. The measured conversion gain of the 3× subharmonic mixer is -5.1±1.5 dB at the RF of 19.5-31.5 GHz. The measured OP 1dB and OIP3 are -15.4 dBm and -7.6 dBm, respectively. The LO-RF isolation and 3LO-RF isolation are >42 dB and >46 dB, respectively, at the operating frequency. The proposed 3× subharmonic mixer consumes DC power of 55.65 mW and occupies a die area of 0.267 mm2.

Original languageEnglish
Article number9133400
Pages (from-to)122986-122996
Number of pages11
JournalIEEE Access
Publication statusPublished - 2020

Bibliographical note

Funding Information:
This work was supported in part by the Yonsei-Samsung Strategy Research Center (YSSRC), and in part by the Institute of Information and Communications Technology Planning and Evaluation (IITP) grant funded by the Korea government (MSIT) under Grant 2020000218.

Publisher Copyright:
© 2013 IEEE.

All Science Journal Classification (ASJC) codes

  • Computer Science(all)
  • Materials Science(all)
  • Engineering(all)


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