Tuneable Film Bulk Acoustic Wave Resonators

Spartak Gevorgian has got his M.Sc. degree in radio engineering from Polytechnic Institute, Yerevan, Armenia in 1972, PhD (1977) and Dr. Sci. (1991) degrees from Electrical Engineering University, S. Petersburg , Russia. Currently he is a professor at the Department of Microtechnology and Nanoscience, Chalmers University of Technology, Sweden. He also works at Ericsson Research on part time bases. His research focuses on exploration of new materials and physical phenomena for application in agile microwave devices. He authored and co-authored more than 400 articles, papers and patents in the fields of microwave photonics, integrated optics, passive and agile microwave components. Tuneable microwave devices based on ferroelectrics and microwave integrated circuits have been the main subject in the last 10 years both at Chalmers University and Ericsson Research. Professor Alexander K. Tagantsev received the B.S degree from St. Petersburg State University, in 1974, and Ph.D. degree from Ioffe Physico-Technical Institute, St. Petersburg, Russia, in 1982 in solid state physics. He joined the Ceramics Laboratory of Swiss Federal Institute of Technology (EPFL), Lausanne, Switzerland in 1993. Tagantsev is a theoretician of a broad domain of expertise from ferroelectricity and phonon physics to electrodynamics of superconductors. He is the author of key results on the theory of microwave dielectrics loss, dielectric polarization in crystalline materials, and relaxor ferroelectricity.  He authored or co-authored more than 200 scientific articles and a comprehensive book on domains in ferroics. Andrei Vorobiev received his M.Sc. degree in physics of semiconductors and dielectrics from the Gorky State University, Gorky, Russia, in 1986 and Ph.D. degree in physics and mathematics from the Institute for Physicsof Microstructures of the Russian Academy of Sciences, Nizhny Novgorod, Russia, in 2000. In 2008 he received title of Associate Professor in physical electronics from the Chalmers University of Technology, Gothenburg, Sweden. He now holds a research chair at the Chalmers University of Technology. His main research interests are in development and application of emerging functional materials and phenomena in microwave devices. Current activities focus on multiferroic and ferroelectric thin films including development of growth processes of thin films,  fabrication processes and experimental investigation of microwave devices. Vorobiev and Gevorgian co-authored the book “Ferroelectrics in Microwave Devices, Circuits and Systems”.  They are the inventors (patented) of tuneable FBARs based on induced piezoelectric effect.

• Dielectric and Acoustic Properties of Ferroelectrics and Piezoelectrics.- Models of FBARs.- Making Non-tuneable FBARs Tuneable.- FBARs Utilising Induced Piezoelectric Effect.- Designs of Tuneable FBARs.- Fabrication Processes and Measurements of FBARs.- Circuit Applications.- Conclusion and Challenges.