Abstract
M-type hexagonal ferrites have been incorporated in a coupled dielectric image guides structure for nonreciprocal microwave circuits design. Two different field configurations have been considered in this paper: for case I the c axis of the ferrite materials was aligned along the direction of propagation; for case II the c axis was aligned in the transverse direction. Electromagnetic wave scattering S parameters of the device were measured for an external biasing magnetic field applied parallel and perpendicular to the c axis of the ferrite slab. We have observed nonreciprocal microwave effects in the ferromagnetic resonance regime as a result of a non-uniform external biasing magnetic field along the propagation direction. We believe that ferrite devices operating at millimeter-wavelength frequencies, such as isolators, filters, modulators, switches, phase shifter, etc., can be implemented from our device design.
Keywords
M-type hexagonal ferrites, field configurations, nonreciprocal coupling structure, FMR, wave scattering
Subject Categories
Dielectric wave guides, Microwave circuits, Ferromagnetic resonance, Electromagnetic waves, Scattering (Physics)
Disciplines
Electromagnetics and photonics
Publisher
American Institute of Physics
Publication Date
5-15-1993
Rights Information
Copyright 1993 American Institute of Physics.
Rights Holder
American Institute of Physics
Permanent URL
Recommended Citation
Kwan, P.; Vittoria, C.; and Proske, J., "Nonreciprocal coupling structure of dielectric wave-guides" (1993). Electrical and Computer Engineering Faculty Publications. Paper 96. http://hdl.handle.net/2047/d20002267
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Notes
Originally published in Journal of Applied Physics 73, 7012 (1993). DOI:10.1063/1.352414 (http://dx.doi.org/10.1063/1.352414).