Millimeter wave phase shifter based on ferromagnetic resonancein a hexagonal barium ferrite thin film

A hexagonal ferrite thin film-based planar millimeter-wave phase shifter was demonstrated. The device made use of an M-type barium ferrite (BaM) thin film prepared by pulsed laser deposition and a coplanar waveguide geometry. The phase tuning relied on ferromagnetic resonance in the BaM film. The de...

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Bibliographic Details
Published in:Applied physics letters 2010-08, Vol.97 (7), p.072509-072509-3
Main Authors: Wang, Zihui, Song, Young-Yeal, Sun, Yiyan, Bevivino, Joshua, Wu, Mingzhong, Veerakumar, V., Fal, Timothy J., Camley, Robert E.
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Summary:A hexagonal ferrite thin film-based planar millimeter-wave phase shifter was demonstrated. The device made use of an M-type barium ferrite (BaM) thin film prepared by pulsed laser deposition and a coplanar waveguide geometry. The phase tuning relied on ferromagnetic resonance in the BaM film. The device showed a phase tuning rate of 43 ° / ( mm kOe ) and an insertion loss of 3.1 dB/mm in the on-resonance regime. In off-resonance regimes, the device showed smaller loss and smaller tuning rates. The experimental results were confirmed by theoretical calculations.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3481086