Abstract

We show that the application of a small (<75 G) magnetic field can be used to switch a low-loss microwave dielectric to a high-loss material. This enables high performing microwave dielectric resonators and filters to be switched between a high-Q on state and a low-Q off state electronically. In this study, the absorption mechanism inducing the low Q state is from electron paramagnetic resonant transitions of an Fe3+ state in a host Al2O3 dielectric. Our modeling efforts show that it is possible to further optimize the performance of these switchable devices through a material selection process, which will entail the choice of host lattice and the J > impurity and its concentration.

Original languageEnglish (US)
Article number052903
JournalApplied Physics Letters
Volume113
Issue number5
DOIs
StatePublished - Jul 30 2018

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microwave switching
Q factors
electron paramagnetic resonance
resonators
impurities

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Switching microwave dielectric resonators from a high-Q on state to an off state using low-field electron paramagnetic resonance transitions. / Gonzales, Justin; Zhang, Chen; Gajare, Siddhesh G.; Newman, Nathan.

In: Applied Physics Letters, Vol. 113, No. 5, 052903, 30.07.2018.

Research output: Contribution to journalArticle

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