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

• Published in: IEEE transactions on microwave theory and techniques Vol. 49; no. 9; pp. 1599 - 1606
• Main Authors: Rafii-El-Idrissi, R., Marques, R., Medina, F.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01-09-2001; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Accounting; Ferrite; Ferrites; Ground plane; Integral equations; Magnetic analysis; Magnetic fields; Magnetic separation; Magnetostatic waves; Mathematical analysis; Mathematical models; Microwaves; Saturation magnetization; Slabs; Spectra; Strip; Strips; Studies; Surface waves
• ISSN: 0018-9480; 1557-9670
• DOI: 10.1109/22.942572

This paper presents a comprehensive and accurate analysis of the guidance of volume and surface magnetostatic waves by strips or slots in the presence of a ferrite slab magnetized to saturation by an external uniform magnetic field. The strip/slot can be directly printed on the ferrite surface or separated from it by means of a dielectric layer of arbitrary thickness. The problem is posed in terms of a suitable integral equation accounting for the magnetostatic limit. This equation is solved by using a spectral-domain formulation. The proposed method allows for the consideration of arbitrary magnetization angles and the presence of upper and/or lower ground planes. Strip-guided forward, backward, and complex surface magnetostatic waves have been obtained and analyzed in terms of the appropriate waveguide parameters. Slot-guided backward volume magnetostatic waves have been also computed and studied. Theoretical results have been checked against theoretical (magnetostatic and full wave) and experimental data available in the literature with reasonable agreement.