Title :
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
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;
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
DOI :
10.1109/ISCAS.2009.5117738
