Title :
Switchable dual-frequency barium strontium titanate film bulk acoustic resonators
Author :
Lee, Victor ; Seungku Lee ; Sis, Seyit Ahmet ; Mortazawi, Amir
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Univ. of Michigan, Ann Arbor, MI, USA
Abstract :
Innovative frequency selective microwave circuit designs are needed to reduce complexity, size, and cost of multi-standard transceivers. Here, the electric field induced piezoelectricity and electric field dependent permittivity of barium strontium titanate are utilized to design multi-frequency intrinsically switchable film bulk acoustic resonators. Individual resonators with different resonance frequencies are switched on and off by controlling the dc bias voltage applied across their terminals. A switchable dual-frequency resonator consisting of series connected 0.95 GHz and 1.15 GHz resonators is demonstrated. The small size and simple design of multi-frequency BST resonators are attractive for use in oscillators and filters for adaptive and reconfigurable radios.
Keywords :
UHF resonators; acoustic resonators; barium compounds; bulk acoustic wave devices; crystal resonators; strontium compounds; Ba0.5Sr0.5TiO3; bulk acoustic resonator; electric field dependent permittivity; electric field induced piezoelectricity; frequency 0.95 GHz; frequency 1.15 GHz; frequency selective microwave circuit design; switchable dual frequency resonator; switchable film resonator; Electrodes; Equations; Loading; Micromechanical devices; Resonator filters; Standards; Switches; Ferroelectric devices; film bulk acoustic resonators (FBARs); radiofrequency micro-electromechanical systems (RF MEMS);
Conference_Titel :
Microwave Symposium (IMS), 2014 IEEE MTT-S International
Conference_Location :
Tampa, FL
DOI :
10.1109/MWSYM.2014.6848634
