Title :
Elastic and EM waves guided by periodic cracks or strips
Author_Institution :
Polish Acad. of Sci., Warsaw
fDate :
31 Oct-3 Nov 1993
Abstract :
A system of perfectly bonded elastic halfspaces is analyzed. It is shown that periodic disbondings which are equivalent to in-plane cracks embedded in an infinite elastic medium, guide shear interfacial waves along the plane. Bragg reflection of the guided wave yields a wide relative stopband, apparently promising in applications in SAW-like resonators. It is also shown that entire, perfect bonding of two properly oriented piezoelectric halfspaces guides SH waves along the plane of bonding if there is a system of conducting strips (or entire metallization) in that plane. Applications are discussed. An EM leaky wave antenna is analyzed with help of the same method
Keywords :
Green´s function methods; acoustic resonators; acoustic waveguides; antenna theory; cracks; crystal resonators; elastic waves; electromagnetic wave scattering; waveguide theory; Bragg reflection; EM leaky wave antenna; SAW-like resonators; conducting strips; in-plane cracks; infinite elastic medium; perfectly bonded elastic halfspaces; periodic disbondings; properly oriented piezoelectric halfspaces; relative stopband; shear interfacial wave; Bonding; Boundary conditions; Dispersion; Electromagnetic radiation; Equations; Fabry-Perot; Frequency; Glass; Reflection; Strips;
Conference_Titel :
Ultrasonics Symposium, 1993. Proceedings., IEEE 1993
Conference_Location :
Baltimore, MD
Print_ISBN :
0-7803-2012-3
DOI :
10.1109/ULTSYM.1993.339478
