Design of IF two-track filters using IDT/(100) AlN/diamond structure

Ruyen Ro,Yuan-Feng Chiang,Sean Wu,Ruyue Lee,Chia-Chi Sung

doi:10.1109/freq.2009.5168325

Design of IF two-track filters using IDT/(100) AlN/diamond structure

Ruyen Ro, Yuan-Feng Chiang + Show 3 more

https://doi.org/10.1109/freq.2009.5168325

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Publication Date: Apr 1, 2009

Citations: 6

Affiliation: I-Shou University, Tung Fang Design Institute, National Taiwan University

#Surface Acoustic Waves Filter #Surface Acoustic Waves + Show 8 more

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Abstract

Propagation characteristics of surface acoustic waves (SAWs) in IDT/(100) AlN/diamond structures are analyzed in this study using the finite element method (FEM). The extracted coupling-of-mode (COM) parameters are employed to calculate the frequency responses of two-track SAW filters using the transmission matrix method. To enhance the sideband suppression, Chebyshev function is adopted to modify the reflectivity distributions of reflectors, which can be realized using width-modulated reflectors. The copper electrode is used to retain a sufficiently high reflectivity. Simulation results show that a two-track SAW filter applicable for the CDMA system can be tailored using IDT/(100) AlN/diamond structures.

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