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US 4,614,923 AGranted
Method of suppressing magnetostatic waves in magnetic garnet films for microwave circuit applications
AssigneesSelenia Industrie Elettroniche Associate S.p.A., I.E.S.S. C.N.R.
InventorsRiccardo Roveda, Carlo Di Gregorio, Paolo De Gasperis, Giuseppe Miccoli
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Abstract
Method for the controlled suppression of magnetostatic waves within magnetic garnet films for microwave circuit applications, based upon the adoption of multilayer structures of epitaxial garnet films of low magnetic losses and high magnetic losses.
Claims12
A method for the controlled suppression of magnetostatic waves in garnet films for microwave applications comprising:
- applying to a passive dielectric substrate at least one epitaxial layer of a low magnetic loss Yttrium-Iron-Garnet film;
- and
- applying to said low loss Yttrium-Iron Garnet film at least one epitaxial layer of a high magnetic loss Calcium-Yttrium-Iron Garnet film.
A microwave signal processing device for the controlled suppression of magnetostatic waves in magnetic garnet films consisting of, in contacting relationship:
- a passive dielectric substrate;
- at least one epitaxial layer of low loss Yttrium-Iron Garnet film;
- and
- at least one epitaxial layer of high magnetic loss Calcium-Yttrium-Iron Garnet film.
1 more element
Dependencies are inferred from the claim text.