학술논문
Modeling Thick Metal in Forward Volume Spin Wave Transducers
Document Type
Periodical
Author
Source
IEEE Microwave and Wireless Components Letters IEEE Microw. Wireless Compon. Lett. Microwave and Wireless Components Letters, IEEE. 32(6):684-687 Jun, 2022
Subject
Language
ISSN
1531-1309
1558-1764
1558-1764
Abstract
In this letter, a theoretical expression for forward volume spin wave (FVSW) transducer radiation resistance is proposed to encompass the effects of transducer metal thickness. This thickness effect results in a reduction of radiation resistance that scales with metal thickness. The reduction in radiation resistance is especially evident in transducers with metal thicknesses approaching the wavelengths of the spin waves launched. A method that decomposes the current source launching spin waves into a series of orthogonal functions that correspond to the FVSW thickness modes is used to evaluate the expression for the radiation resistance. Five different spin wave transducers with metal thicknesses of 0.1, 0.3, 0.5, 0.7, and $0.9 {\mu }m$ were simulated in HFSS (using a magnetostatic approximation) and their resultant radiation resistances and radiation efficiencies confirm the theoretical expression.