Title :
Fast determination of coupling-of-modes parameters based on strip admittance approach
Author :
Hashimoto, Ken-ya ; Koskela, Janne ; Salomaa, M.M.
Author_Institution :
Dept. of Electron. & Mech. Eng., Chiba Univ., Japan
Abstract :
This paper proposes a simple technique to determine parameters required in the coupling-of-modes (COM) analysis for surface acoustic wave (SAW) devices. It is based on finding zeros and poles in the strip admittance Y(β,ω) for fixed β=2π/pI where β is the wavenumber and ω is the radial frequency. This corresponding to the input admittance of infinite interdigital transducer (IDT). This technique is directly applicable to the analysis of IDTs with multiple fingers. Effectiveness of this technique is highlighted when IDTs under consideration possess directivity.
Keywords :
coupled mode analysis; electric admittance; interdigital transducers; poles and zeros; surface acoustic wave transducers; coupling-of-modes analysis; directivity; interdigital transducer; poles and zeros; strip admittance; surface acoustic wave device; Acoustic waves; Admittance; Fingers; Frequency; Gratings; Poles and zeros; Strips; Surface acoustic wave devices; Surface acoustic waves; Transducers;
Conference_Titel :
Ultrasonics Symposium, 1999. Proceedings. 1999 IEEE
Conference_Location :
Caesars Tahoe, NV
Print_ISBN :
0-7803-5722-1
DOI :
10.1109/ULTSYM.1999.849363