Field-Tunable Oxides and Applications in RF/Wireless Components

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Tuesday, February 5, Kemper 1065, 9:30am-11:00am

Speaker: Bob York
UC Santa Barbara

Host: Professor Subhash Mahajan


Complex high-permittivity oxides such as barium-strontium titanate exhibit interesting field-dependent properties that make them attractive for application in adaptive/reconfigurable RF and wireless components such as tunable filters, electrically-small and reconfigurable antennas, and phase-shifters for low-cost phased-arrays. Advances in deposition technologies for complex oxides (principally sputtering and molecular beam epitaxy) have led to steady improvements in electrical performance of the materials and devices to the point of commercial adoption in a number of modern communication systems . This talk will review some of the relevant properties of the materials, device applications and technical challenges that were overcome in their development, and recent research in exploiting electrostrictive properties to implement a new class of voltage-activated BAW resonators for high-Q adaptive filters.


Prof. York is on the faculty of Electrical and Computer Engineering at UC Santa Barbara, and currently servers as Director of the Technology Management Program, an educational program in business management and entrepreneurship within the College of Engineering. Prof. York received his Ph.D. in Electrical Engineering from Cornell University in 1991. His research interests include high frequency circuits, applied electromagnetics, and device physics, and his work focuses primarily on the development and application of new architectures and new materials for RF/microwave devices, circuits, and systems. His current research concentration is on advanced integrated thin-film ferroelectrics with applications to broadband wireless systems, and high-power GaN-based devices and circuits for millimeter-wave systems and switch-mode power electronics. He is a fellow of the IEEE.