Patent ID: 6353375
Filing Date: 2002-03-05
Classification: H01F,H03H

Abstract:
A magnetostatic wave device comprising at least one ferrimagnetic film for exciting and propagating magnetostatic waves, an RF signal feed line for feeding RF signals to the ferrimagnetic film and a magnetic field generator for applying a magnetic field to the ferrimagnetic film, said magnetic field generator comprising, at least, a permanent magnet and one pair of yokes that are magnetically connected to the permanent magnet and are opposite to each other while an air gap with the ferrimagnetic film received therein is located between them, wherein:said one pair of yokes are opposite to each other by way of at least a post formed of a non-magnetic material, and said post and said yokes are fixed together by engagement of at least one protrusion formed on either one of said yokes and said post within at least one recess formed in the other.