paper 150308104509

Published: 2015-07-09

Phase Behaviour of an Azimuthally Magnetized Two-Layered Ferrite-Dielectric Circular Waveguide

Georgi Nikolov Georgiev,

Georgi Nikolov Georgiev

Consulting and Researcher in Physics, Mathematics and Computer Sciences, Bulgaria

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Mariana Nikolova Georgieva-Grosse

Consulting and Researcher in Physics and Computer Sciences, Bulgaria

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Proceedings of 2015 Photonics & Electromagnetics Research Symposium, Prague, July 6 - 9，Page(s)1209-1214

Abstract

The areas of propagation in the r̄0 − β̄ — phase plane, the β̄(r̄0 ) — phase character- istics and the lower and upper cut-off frequencies (the lower and upper normalized critical guide radii r̄0cr and r̄0en± , resp.) of the circular waveguide, containing a thick latching ferrite cylinder, magnetized azimuthally to remanence, surrounded by a thin dielectric toroid, are studied for the normal T E01 mode, assuming equal values of the relative permittivities of both strata, (r̄0 and β̄ — the guide radius and phase constant, normalized with respect to the frequency and relative permittivity of anisotropic filling, “+” and “−” — subscripts, labeling quantities, relevant to positive, resp. negative direction of its magnetization). The principle outcome of the investiga- tion is that the removal even of an insignificant part from the ferrite in the vicinity of the wall and its replacement by an isotropic medium changes substantially the phase behaviour of the configuration, compared to the case in which it fills in the whole transmission line, inspected ear- lier. This is visible for both signs of ferrite magnetization, but especially noticeable if its sign is positive (counter-clockwise). Besides, the alteration of the size of outer layer, of its permittivity, keeping that of the inner one the same and of the direction of magnetization of the ferrite load, are the most important factors that determine the position, boundaries, shape and dimensions of the region in the phase plane in which the wave might be sustained, as well as the distribution of its two kinds of cut-off frequencies (the critical radii).

Citation

Georgi Nikolov Georgiev, and Mariana Nikolova Georgieva-Grosse, "Phase Behaviour of an Azimuthally Magnetized Two-Layered Ferrite-Dielectric Circular Waveguide," Proceedings of 2015 Photonics & Electromagnetics Research Symposium, Prague, July 6 - 9，Page(s)1209-1214

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