Title: A Microwave Fuse Based on Insulator-to-Metal Phase Transition in Lanthanum Cobalt Oxide Thin Films
Presenter: Benjamin Grisafe (Suman Datta's group, Notre Dame)
Abstract: The ever increasing demand of microwave and millimeterwave components and systems in terms of higher power density and agile tracking capability is fueling need for high-performance protection devices that can protect the sensitive receiver front-ends from transient surges. We discuss our recent progress in fabrication and characterization of high repeatability microwave limiter devices based on the integration of lanthanum cobalt oxide (LCO) thin films in a coplanar waveguide (CPW) transmission line. LCO is a novel material that exhibits fully reversible insulator-to-metal phase transition (IMT) triggered by either charge injection or thermal excitation or both, and capable of operating in high ambient temperatures. The LCO based MW fuse operates over a very broad frequency band, from 100 MHz to 50 GHz, and its isolation and insertion loss characteristics are benchmarked against other incumbent technologies. This work was done in collaboration with the Schlom group at Cornell with valuable technical input from liaisons of Northrop Grumman.
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