Title :
FEUDT periodic cell with different width electrodes
Author :
Biryukov, Sergey V. ; Weihnacht, Manfred
Author_Institution :
Leihniz Inst. for Solid State & Mater. Res., Dresden, Germany
Abstract :
A periodic cell of the floating electrode unidirectional SAW transducer (FEUDT) in the general case of electrodes of finite thickness and of different width is investigated. The important parameter of unidirectionality as a phase shift between reflection and transduction centers is calculated. In contrast to the regular case of equal width electrodes and gaps, one can see a lot of possibilities to reach the optimal phase shift 45°.
Keywords :
acoustic wave reflection; boundary-elements methods; electrodes; surface acoustic wave transducers; ultrasonic transducers; FEUDT periodic cell; electrode thickness; electrode width; equal width electrodes; equal width gaps; floating electrode unidirectional SAW transducer; impedance method; natural boundary element method; optimal phase shift; reflection centers; transduction centers; unidirectionality parameter; Admittance; Boundary element methods; Electrodes; Electrostatics; Gratings; Impedance measurement; Reflection; Solid state circuits; Surface acoustic waves; Transducers;
Conference_Titel :
Ultrasonics Symposium, 2004 IEEE
Print_ISBN :
0-7803-8412-1
DOI :
10.1109/ULTSYM.2004.1418227
