Title :
Ferrite-Coupled Line Circulator Simulations For Application at X-Band Frequency
Author :
Yoon, S.D. ; Wang, Jiangwei ; Sun, Nian ; Vittoria, C. ; Harris, V.G.
Author_Institution :
Dept. of Electr. & Comput. Eng., Northeastern Univ., Boston, MA
fDate :
6/1/2007 12:00:00 AM
Abstract :
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 (4piMS ) 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 S21 and the isolation S12 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
Keywords :
ferrimagnetic resonance; ferrite circulators; garnets; magnetic thin films; magnetisation; yttrium compounds; 8 to 12 GHz; X-band frequency circulator; YFe5O12; YIG; YIG slab; broadband circulator operation; circulator circuit; ferrimagnetic resonance linewidth; ferrite-coupled line circulator simulations; in-plane circulator design; insertion loss; magnetization aligns; saturation magnetization; weight reduction; yttrium iron garnet film; Circuit simulation; Ferrimagnetic films; Ferrite films; Frequency; Garnets; Iron; Magnetic circuits; Magnetic resonance; Magnetization; Yttrium; Circulators; electromagnetic propagation in nonreciprocal media; ferrimagnetic films; ferrite circulators; millimeter-wave magnetic devices;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2007.893788
