Design and implementation of parallel-IDT surface acoustic waves (SAW) low loss RF filters

Author

Ou, Hsu-Cheng ; Zaghloul, Mona

Author_Institution

George Washington Univ., Washington, DC, USA

fYear

2009

fDate

24-27 May 2009

Firstpage

273

Lastpage

276

Abstract

In this work, we study the design and implementation of a parallel-IDT surface acoustic wave (SAW) filter for telecommunication applications. The equivalent circuit and 3D model are established to understand acoustoelectric interactions. The 128⁰ Y-Z rotated LiNbO₃ which has high electromechanical coupling constant is used as the piezoelectric material to generate the acoustic waves. The single-IDT and parallel IDT SAW filters were implemented in 122 MHz. The parallel-IDT SAW filter has an insertion loss to -5.515 dB, larger than the single-IDT SAW filter.

Keywords

VHF filters; acoustoelectric devices; interdigital transducers; lithium compounds; piezoelectric materials; surface acoustic wave filters; surface acoustic wave transducers; 3D model; LiNbO₃; SAW; acoustic wave generation; acoustoelectric interaction; electromechanical coupling constant; equivalent circuit; frequency 122 MHz; gain 5.51 dB; insertion loss; low-loss RF filter; parallel-IDT surface acoustic wave design; piezoelectric material; Acoustic waves; Admittance; Electrodes; Equivalent circuits; Piezoelectric materials; Power harmonic filters; Radio frequency; SAW filters; Surface acoustic waves; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2009. ISCAS 2009. IEEE International Symposium on

Conference_Location

Taipei

Print_ISBN

978-1-4244-3827-3

Electronic_ISBN

978-1-4244-3828-0

Type

conf

DOI

10.1109/ISCAS.2009.5117738

Filename

5117738