A Study of Ferrite Loaded Planar Waveguiding Structures,
BROWN UNIV PROVIDENCE R I DIV OF ENGINEERING
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We have obtained the full modal spectrum of the lowest order modes TE,n0 for a simple model of the ferrite loaded stripline. Although quantitatively the results cannot be expected to be in good agreement with experimental results. Nevertheless, qualitatively the results should reflect accurately the behavior of such a waveguiding system. It has become clear that components purportedly using an edge-guided i.e., quasi-surface mode in fact employ the field displaced quasi-TEM waveguide or dynamic mode. This latter mode, for even moderately wide ferrite slabs line widths will assume a surface mode-like structure. Even from the limited simple calculations it appears that operation over two octaves may well become possible. However, further studies on a better model which also considers the effect of material and conductor losses must be completed before definitive conclusions can be reached. It appears currently that the greatest difficulty will lie in suppressing unwanted surface modes while higher order modes will be quite readily suppressed using lossy films on the appropriate ferrite-dielectric interface or guide edge.
- Line, Surface and Bulk Acoustic Wave Devices
- Electricity and Magnetism