Title :
General properties of the Anisimkin Jr.´ plate modes
Author :
Anisimkin, Vladimir I.
Author_Institution :
Kotel´´nikov Inst. of Radio Eng. & Electron., Russian Acad. of Sci., Moscow, Russia
Abstract :
For materials of different symmetry and orientation three types of plate modes are found at velocity vn close to the velocity vL of the longitudinal BAW - the Lamb, Anisimkin Jr.´, and quasi-longitudinal. Shorting plate faces and avoiding piezoelectric effect do not transform one type of the mode to the other. The Lamb modes approach vn = vL at irregular plate thickness (h/¿)n and large dispersion dvn/d(h/¿) ¿ 103 m/s (h - thickness, ¿ - wavelength, n - mode order). Other modes are characterized by less dispersion dvn/d(h/¿) ¿ 103 m/s and regular (h/¿)n, forming strict succession of the whole numbers, which are close to periodic plate thickness for transverse BAW resonance. It is these general properties satisfied simultaneously rather than anisotropy and piezoelectric stiffening of the plates play an important role in existence of the Anisimkin Jr.´ and QL-modes. As the modes possess negligible elastic displacement perpendicular to the plate faces, they are attractive candidates for liquid sensing.
Keywords :
bulk acoustic wave devices; liquids; piezoelectricity; plates (structures); surface acoustic waves; Anisimkyn Jr. plate modes; Lamb modes approach; QL-modes; anisotropy; liquid sensing; longitudinal BAW; material orientation; material symmetry; piezoelectric effect; piezoelectric stiffening; Acoustic propagation; Crystalline materials; Crystals; Dielectric materials; Piezoelectric effect; Piezoelectric materials; Resonance; Solids; Strontium; Tellurium;
Conference_Titel :
Ultrasonics Symposium (IUS), 2009 IEEE International
Conference_Location :
Rome
Print_ISBN :
978-1-4244-4389-5
Electronic_ISBN :
1948-5719
DOI :
10.1109/ULTSYM.2009.5441462