Investigation of Voltage-Activated BAW Devices and Filters
[Technical Report, Final Report]
University of California - Santa Barbara
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The overarching goal of this project was to better understand and exploit voltage-induced piezoelectricity in thin-film strontium titanate STO and barium-strontium titanate BST, with the ultimate objective of creating high-performance, reconfigurable filters and frequency-agile RF components. Unlike conventional BAW technology, the piezoelectric coupling in BST is controlled by an applied DC field. In the absence of a DC field no acoustic resonance is observed when a DC field is applied the device becomes piezoelectrically active and acts like a high-QBAW resonator, a fundamental building block for frequency-selective circuits.
- Electricity and Magnetism