Accession Number : ADP000939

Title :   Guiding Magnetostatic Surface Waves with Nonuniform In-Plane Fields,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE RESEARCH LAB OF ELECTRONICS

Personal Author(s) : Stancil,Daniel D. ; Morgenthaler,Frederic R.

Report Date : JAN 1983

Pagination or Media Count : 11

Abstract : The authors have recently reported the observation of magnetostatic surface waves (MSSW's) in a rectangular YIG (Yttrium Iron Garnet) film placed between strips of mu-metal and in the plane of the strips. However, the interpretation of this experiment was complicated by the fact that the field was nonuniform not only in the transverse direction but along the direction of propagation as well. This latter nonuniformity resulted because the microstrip antenna structure did not allow the strips to extend along the entire path of propagation. We here report experiments using a rectangular slab and a different antenna structure which minimizes this difficulty. These experiments suggest that nonuniform in-plane fields can be used to alter the dispersion characteristics of the waves. In addition, new experiments are described in which nonuniform fields caused by a slot in a mu-metal covering layer are used to guide MSSW's through a turn of 160 deg. (Author)

Descriptors :   *Magnetostatics, *Surface waves, *Magnetic fields, Dispersions, Guidance, Anisotropy, Yttrium iron garnet, Thick films, Geometry, Paths, Curves(Geometry)

Distribution Statement : APPROVED FOR PUBLIC RELEASE