Ferrite-Coupled Line Circulator Simulations For Application at X-Band Frequency

We have designed and simulated a circulator circuit in which the magnetization aligns along the plane of an yttrium iron garnet (YIG) film. For an X-band frequency (8-12 GHz) circulator we have utilized a YIG slab (~200 mum thick) with saturation magnetization (4piM S ) and ferrimagnetic resonance (...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2007-06, Vol.43 (6), p.2639-2641
Main Authors: Yoon, S.D., Jiangwei Wang, Nian Sun, Vittoria, C., Harris, V.G.
Format: Article
Language:English
Subjects:
Broadband
Circuit design
Circuit simulation
Circulation
Circulators
Cross-disciplinary physics: materials science
rheology
electromagnetic propagation in nonreciprocal media
Exact sciences and technology
Ferrimagnetic films
ferrite circulators
Ferrite films
Frequency
Garnets
Iron
Magnetic circuits
Magnetic resonance
Magnetism
Magnetization
Materials science
millimeter-wave magnetic devices
Noise levels
Other topics in materials science
Physics
Simulation
Weight reduction
X-band
Yttrium
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Summary:We have designed and simulated a circulator circuit in which the magnetization aligns along the plane of an yttrium iron garnet (YIG) film. For an X-band frequency (8-12 GHz) circulator we have utilized a YIG slab (~200 mum thick) with saturation magnetization (4piM S ) and ferrimagnetic resonance (FMR) linewidth (DeltaH) of ~139.26 kA/m and 10 Oe, respectively. Broadband circulator operation was realized for frequencies above FMR, f=5 GHz. The applied FMR field was 79.58 kA/m. The Ansoft HFSS software suite was used to simulate the circulator response. The insertion loss S 21 and the isolation S 12 were calculated to be ~0.9 dB and ~-52 dB, respectively, with ~15% bandwidth at the center frequency of 10.1 GHz. We believe that this in-plane circulator design may enable high performance with significant volume and weight reduction
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2007.893788