Piezoelectric Thin-Film Acoustic Wave Resonators and Filters for Wireless Communications
This community develops high-frequency acoustic wave devices, primarily resonators and filters, using piezoelectric thin films to manage radio signals in wireless communication systems.
The work centers on fabricating and optimizing thin films of lithium niobate, aluminum nitride, and scandium-doped aluminum nitride. These materials are processed into surface acoustic wave (SAW) and bulk acoustic wave (BAW) structures, including delay lines and MEMS resonators. The research focuses on enhancing electromechanical coupling, quality factors, and temperature stability. Applications include RF filters for 5G and 6G cellular radios, millimeter-wave operation, and acoustic sensors. Methods involve magnetron sputtering, finite element simulation, and CMOS integration to achieve compact, wideband performance for modern telecommunications infrastructure.
The community represents 3.5% of all scandium research and 1.2% of niobium research. It also accounts for 0.7% of aluminium research, with 926 papers in that element’s total.
The community comprises 5,375 papers, published most frequently in Applied Physics Letters, Micromachines, and the Journal of Microelectromechanical Systems.
Recent work includes spin-wave band-pass filters for 6G communication, precision acoustofluidics for mechanobiology, and wideband tunable nonreciprocal bandpass filters using magnetostatic surface waves.