A Distributed Magnetostatic Resonator

A Distributed Magnetostatic Resonator

This work reports the design, fabrication, and characterization of coupling-enhanced magnetostatic forward volume wave (MSFVW) resonators with significant spur suppression. The fabrication is based on surface micromachining of yttrium iron garnet (YIG) film on a gadolinium gallium garnet (GGG) subst...

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Veröffentlicht in:IEEE transactions on microwave theory and techniques 2024-10, Vol.72 (10), p.5679-5686
Hauptverfasser: Devitt, Connor, Tiwari, Sudhanshu, Bhave, Sunil A., Wang, Renyuan
Format: Artikel
Sprache:eng
Schlagworte:
Coupling coefficients
Couplings
Design factors
Filters
Gadolinium
Gadolinium-gallium garnet
Gold
Magnetoacoustic effects
Magnetostatic wave (MSW)
Magnetostatic waves
Magnetostatics
Micromachining
Resonators
Substrates
Transducers
tunable resonator
yttrium iron garnet (YIG)
Yttrium-iron garnet
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Beschreibung
Zusammenfassung:This work reports the design, fabrication, and characterization of coupling-enhanced magnetostatic forward volume wave (MSFVW) resonators with significant spur suppression. The fabrication is based on surface micromachining of yttrium iron garnet (YIG) film on a gadolinium gallium garnet (GGG) substrate with thick gold transducers. A distributed resonator is used to excite forward volume waves in YIG to realize a frequency-dependent coupling boost. Fabricated devices at 18 and 7 GHz show coupling coefficients as high as 13% and quality factors above 1000. Higher order magnetostatic mode suppression is experimentally demonstrated through a combination of transducer and YIG geometry design.
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.2024.3381549