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سی و چهارمین کنفرانس بین المللی مهندسی برق
Wave Propagation in Ferrimagnetic Medium with Transverse Time-Varying Bias Field
نویسندگان :
Seyed Hossein Hosseini Biuki
1
Behzad Rejaei
2
Mohammad Memarian
3
1- دانشگاه صنعتی شریف
2- دانشگاه صنعتی شریف
3- دانشگاه صنعتی شریف
کلمات کلیدی :
Time-varying media،magnetic material،harmonic generation
چکیده :
Time-varying electromagnetic media have extensively been studied and implemented in recent years, with almost all literature focusing on temporal modulation of permittivity. In contrast, time-varying permeability remains largely unexplored, which provides the primary motivation for this work. Here we propose and investigate a mechanism for time-varying permeability, by means of riding a small temporal fluctuation on top of a static magnetic bias field, applied to realistic ferrite at microwaves. Wave propagation normal to the bias direction is studied by computing the modes and the corresponding dispersion diagram of a time periodic ferrite from first principles. Furthermore, scattering of microwaves from a slab of such medium is presented, revealing many harmonics generated in the reflection and transmission spectra. All results confirm the potential realization of time-varying permeability at microwave frequencies.
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