Design of self-biased coplanar circulator with ferromagnetic nanowires

Wen Zhou, Joseph Um, Bethanie Stadler, Rhonda Franklin

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

7 Scopus citations


A triangular Y-j unction coplanar circulator based on Co nanowire array is designed and simulated in HFSS. Co nanowire array is modelled as ferrite with properties extracted from vibrating sample magnetometer (VSM) and ferromagnetic resonance (FMR) measurement. The circulator consists of printed circuit on Duroid board and nanowire array placed on top of the Y-junction. The simulation results show that with proper estimation of magnetic properties, a circulator can be achieved with 30.9 dB isolation, 2.1 dB insertion loss and 15 dB bandwidth of 1.7 GHz at 28.7 GHz.

Original languageEnglish (US)
Title of host publicationRWS 2018 - Proceedings
Subtitle of host publication2018 IEEE Radio and Wireless Symposium
PublisherIEEE Computer Society
Number of pages3
ISBN (Electronic)9781538607091
StatePublished - Feb 28 2018
Event2018 IEEE Radio and Wireless Symposium, RWS 2018 - Anaheim, United States
Duration: Jan 14 2018Jan 17 2018

Publication series

NameIEEE Radio and Wireless Symposium, RWS
ISSN (Print)2164-2958
ISSN (Electronic)2164-2974


Other2018 IEEE Radio and Wireless Symposium, RWS 2018
Country/TerritoryUnited States

Bibliographical note

Funding Information:
The authors acknowledge the assistance and support from Yali Zhang for nanowire modelling, Alexander Nelson for initial nanowire characterization, and the University of Minnesota’s Institute for Rock Magnetism for VSM, and Minnesota Nano Center for SEM. MNC is sponsored by the NSF NNCI network. This work was supported by National Science Foundation under Award ECCS #1509543.

Publisher Copyright:
© 2018 IEEE.


  • Co nanowires
  • Coplanar Waveguide
  • Ferromagnetic resonance
  • Self-bias
  • Triangular Y-junction circulator


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