Accession Number : ADP000936

Title :   Buried Magnetostatic-Forward-Volume-Wave Transducers,

Corporate Author : STATE UNIV OF NEW YORK AT STONY BROOK DEPT OF ELECTRICAL ENGINEERING

Personal Author(s) : Parekh,J. P. ; Tuan,Hang-Sheng

Report Date : JAN 1983

Pagination or Media Count : 8

Abstract : This paper reports theoretical computations of the magnetostatic-forward-volume-wave (MSFVW) excitation characteristics of transducers that are buried within a YIG film. The frequency variation of the radiation resistance of a line-current source and a microstrip transducer is calculated over the entire magnetostatic-volume-wave (MSVW) spectrum. The expectation that the symmetry of transducer location relative to the YIG film must determine whether symmetric or antisymmetric MSFVW's are selectively excited is borne out in the present work. Thus, while a surface-localized microstrip transducer selectively excites the lowest (or alpha=O) mode which is found to be an antisymmetric mode, a microstrip transducer buried half-way across the film selectively excites the lowest symmetric (or alpha=1) mode. The suppression of unwanted modes is far superior with the latter buried microstrip transducer than with a surface-localized microstrip transducer. While the technological problem of implementing buried transducers remains to be resolved, the present results are of relevance to the MSFVW layered structure wherein the transducer is sandwiched between two YIG films. (Author)

Descriptors :   *Magnetostatics, *Transducers, *Buried objects, *Computations, Fourier transformation, Integral equations, Yttrium iron garnet, Films, Excitation, Symmetry, Suppression

Distribution Statement : APPROVED FOR PUBLIC RELEASE