Design and Simulation of a SAW Filter and a new approach for bandwidth´s tuning

Author

Sadeghi, M. ; Ghayour, R. ; Abiri, H. ; Karimi, M.

Author_Institution

Shiraz Univ., Shiraz, Iran

fYear

2009

fDate

20-23 Oct. 2009

Firstpage

642

Lastpage

645

Abstract

In this paper the analysis and structure of the SAW devices including SAW filters are examined and improved. The SAW devices have good stability and reliability and they are widely used in high-frequency communication systems such as mobile and TV sets. The design procedure of band-pass SAW filter is explained and accordingly a band-pass SAW filter with center frequency of 100 MHz is designed and simulated by COMSOL MULTIPHYSISC and MATLAB soft ware. The idea of adding a sensitive layer between the input and out inter digital transducers (IDT) is also examined. It is shown that by changing the dimension of this layer, the specification of the filter is changed. Hence, it can be used as an effective tool for adjusting the desired specification of the filter such as the bandwidth and insertion loss.

Keywords

band-pass filters; interdigital transducers; micromechanical devices; surface acoustic wave filters; COMSOL MULTIPHYSISC; MATLAB; SAW devices; SAW filters; band-pass filter; bandwith tuning; frequency 100 MHz; insertion loss; interdigital transducers; microelectromechanical systems; sensitive layer; Acoustic propagation; Acoustic transducers; Band pass filters; Bandwidth; Fingers; Piezoelectric transducers; SAW filters; Stability; Surface acoustic wave devices; TV; MEMS devices; SAW filter; sensitive layer;

fLanguage

English

Publisher

ieee

Conference_Titel

ASIC, 2009. ASICON '09. IEEE 8th International Conference on

Conference_Location

Changsha, Hunan

Print_ISBN

978-1-4244-3868-6

Electronic_ISBN

978-1-4244-3870-9

Type

conf

DOI

10.1109/ASICON.2009.5351328

Filename

5351328