Buried magnetostatic-forward-volume-wave transducers
Abstract
This paper reports theoretical computations of the magneto-static-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=0) 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.
- Publication:
-
Proceedings of the RADC Microwave Magnetics Technology Workshop
- Pub Date:
- January 1983
- Bibcode:
- 1983radc.proc..229P
- Keywords:
-
- Excitation;
- Magnetostatics;
- Microstrip Transmission Lines;
- Transducers;
- Yttrium-Iron Garnet;
- Computation;
- Fourier Transformation;
- Line Current;
- Symmetry;
- Communications and Radar