Title :
Fan electrostatics [tapered IDTs]
Author :
Danicki, Eugene J.
Author_Institution :
Polish Acad. of Sci., Warsaw, Poland
Abstract :
The spatial spectrum of electric charge distribution on the IDT fingers describe, in first approximation, the IDT frequency response. The paper develops a method for evaluation of the charge distribution on tapered (`fan´) IDTs which lacks developed analytical method since they were first proposed in 1972. Here, a modified Kelvin transformation is used to transform a `fan´ IDT into a system of almost parallel strips, with modified strip voltages and the induced substrate anisotropy, which system can be analyzed with help of appropriate methods known in SAW literature
Keywords :
electric charge; electrostatics; frequency response; interdigital transducers; surface acoustic wave devices; IDT fingers; IDT frequency response; SAW devices; electric charge distribution; fan IDTs; fan electrostatics; induced substrate anisotropy; modified Kelvin transformation; modified strip voltages; spatial spectrum; tapered IDTs; Anisotropic magnetoresistance; Dielectric substrates; Electrostatics; Fingers; Frequency response; Kelvin; Metallization; Strips; Surface acoustic waves; Voltage;
Conference_Titel :
Ultrasonics Symposium, 2000 IEEE
Conference_Location :
San Juan
Print_ISBN :
0-7803-6365-5
DOI :
10.1109/ULTSYM.2000.922509
