Title :
Ladder-type SAW filters using thinned density of randomly distributed "hot" electrodes
Author :
Che-Uk Kim ; Balashov, Sergey M. ; Plessky, Victor P. ; Chang-Woo Nam ; Kyu-Chul Lee
Author_Institution :
Univ. of Ulsan, Ulsan, South Korea
fDate :
11/1/2010 12:00:00 AM
Abstract :
A new method for the design of relatively narrowband ladder-type SAW filters is proposed. It consists of the thinning procedure and consecutive randomization of positions of the remaining transductive periods inside the IDT to suppress undesirable additional passbands. A 0.9% fractional bandwidth filter on LiTaO3 42°-cut was designed and manufactured using the proposed approach.
Keywords :
band-pass filters; electrodes; interdigital transducers; surface acoustic wave filters; surface acoustic wave transducers; IDT; LiTaO3; additional passbands; consecutive randomization; fractional bandwidth filter; randomly distributed hot electrodes; relatively narrow-band ladder-type SAW filters; thinned density; thinning procedure; transductive periods; Band pass filters; Bandwidth; Insertion loss; Passband; Resonator filters; SAW filters; Transducers;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
DOI :
10.1109/TUFFC.2010.1724
