Title :
New high-power magnetically tunable microwave filter
Author :
Baynham, A.C. ; Dunsmore, M.R.B.
Author_Institution :
Royal Radar Establishment, Great Malvern, UK
Abstract :
The magnetic-field-dependent dispersion and low loss exhibited by spin waves propagating through ferrimagnetic materials, in the electromagnetic region of their spectrum, permit the construction of tunable microwave interference filters bearing a close analogy to the optical Fabry-Perot étalon. Since this approach avoids a strong coupling of energy into the electron-spin dipoles at their uniform-precession resonance frequency, the power levels required to produce nonlinearities in the filter response are in excess of 1 kW.
Keywords :
magnetic devices; magnetic materials; microwave filters; tuning; dispersion; ferrimagnetic materials; magnetic tuning; microwave filter; spin waves;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19710062