An adaptive circulator fabricated on a 130 nm CMOS is presented. Circulator has two adaptive blocks for gain and phase mismatch correction and leakage cancelation. The impedance matching circuit corrects mismatches for antenna, divider, and LNTA. The cancelation block cancels the Tx leakage. Measured isolation between transmitter and receiver for single tone at 2.4 GHz is 90 dB, and for a 40 MHz wide-band signal is 50dB. The circulator Rx gain is 10 dB, with NF = 4.7 dB and 5 dB insertion loss.

Original languageEnglish (US)
Title of host publicationRFIC 2016 - 2016 IEEE Radio Frequency Integrated Circuits Symposium
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages4
ISBN (Electronic)9781467386500
StatePublished - Jul 8 2016
Event2016 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2016 - San Francisco, United States
Duration: May 22 2016May 24 2016


Other2016 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2016
Country/TerritoryUnited States
CitySan Francisco


  • Echo cancelation
  • Full-Duplex Transceiver
  • Leakage cancelation
  • On-chip circulator

ASJC Scopus subject areas

  • Engineering(all)


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