Patent ID: 6114929
Filing Date: 2000-09-05
Classification: H03H

Abstract:
A magnetostatic wave device comprising:a magnetic garnet film configured to excite and to propagate magnetostatic waves upon receiving electromagnetic waves,a magnetic field generator configured to apply a magnetic field to the magnetic garnet film,first and second ground conductors opposing each other and sandwiching the magnetic garnet film therebetween, the first ground conductor having an opposing surface opposed to a first main surface of the magnetic garnet film, the second ground conductor having an opposing surface opposed to a second main surface of the magnetic garnet film, andan RF signal feeder line disposed between the magnetic garnet film and the first ground conductor,wherein:t.sub.1 .gtoreq.t.sub.R +5 .mu.mt.sub.2 .gtoreq.0 .mu.m, andt.sub.1 +t.sub.2 .ltoreq.500 .mu.min which t.sub.1 is a distance between the opposing surface of the first ground conductor and the first main surface of the magnetic garnet film, t.sub.2 is a distance between the opposing surface of the second ground conductor and the second opposing surface of the magnetic garnet film and t.sub.R is a thickness of the RF signal feeder line.