Efficient analysis of magnetostatic surface waves in printed and suspended ferrite loaded strip lines

Abstract

This paper analyzes the guidance of magnetostatic surface waves (MSSW) by a metallic strip printed on a ferrimagnetic slab or on a dielectric/ferrimagnetic structure (suspended configuration) in the frame of the magnetostatic approach. An integral spectral domain analysis (SDA) is used for this purpose. Shielding upper and/or lower ground planes are also considered. Some interesting new physical effects, such as backward and complex MSSWs in the suspended configuration are reported. Good agreement with previously published experimental and computed results confirms the validity of our approach.

Comprehensive analysis of strip- and slot-line guided forward, backward, and complex magnetostatic waves

“…Since it has no restrictions on the direction of the static magnetizing field, it can account for the presence of a dielectric region between the strip and ferrite layer and upper and/or lower ground plane(s) can be considered. In order to illustrate the accuracy of this method, we have compared in [13] our magnetostatic results with those obtained following the method reported in [7], where a relatively cumbersome full-wave analysis was applied. An excellent agreement between magnetostatic and full-wave results has been found, proving the accuracy of the present method.…”

“…In [13], the authors analyzed the propagation of MSSWs along ferrite loaded strip lines. Forward, backward, and complex bound modes were reported in [13] for the appropriate frequencies and waveguide parameters.…”

“…In [13], the authors analyzed the propagation of MSSWs along ferrite loaded strip lines. Forward, backward, and complex bound modes were reported in [13] for the appropriate frequencies and waveguide parameters. Such kind of modes were previously reported for unbound ferrite loaded parallel-plate waveguides by Marqués et al [14].…”

“…In addition, the presence of bound complex modes in nonreciprocal waveguides as an alternative to evanescent reactive modes of the reciprocal ones was demonstrated in [15]. The integral spectral domain analysis (ISDA), previously used in [13], will be extended in this paper to analyze MSWs guided by metallic strips or slots printed on a ferrite substrate or on a dielectric slab backed by a ferrite substrate. The ferrite material is assumed magnetized to saturation by an externally applied arbitrarily oriented uniform static magnetic field.…”

Fundamental wave phenomena on biased-ferrite planar slab waveguides in connection with singularity theory

“…Regarding fundamental modal phenomena, surface magnetostatic and dynamic modes supported by ferrite structures have been of primary interest for a long time. Surface magnetostatic and dynamic modes of a biased-ferrite slab waveguide were studied in [5]- [9], and magnetostatic volume and surface waves on printed strip and slot lines and circular microstrip resonators were recently investigated in [3], [10], and [11]. Complex modes in ferrite loaded parallel-plate waveguides and shielded finlines were analyzed in [12] and [13], respectively.…”