کنفرانس مهندسی برق ایران

صفحه اصلی / سی و چهارمین کنفرانس بین المللی مهندسی برق

Wave Propagation in Ferrimagnetic Medium with Transverse Time-Varying Bias Field

نویسندگان :

Seyed Hossein Hosseini Biuki¹ Behzad Rejaei² Mohammad Memarian³

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.