Title :
Composite fan-shaped SAW transducers
Author :
Bausk, E.V. ; Yakovkin, I.B.
Author_Institution :
Inst. of Semicond. Phys., Acad. of Sci., Novosibirsk, Russia
Abstract :
In a proposed surface acoustic wave (SAW) filter construction a signal processing is carried out in two parallel acoustic channels. Due to a slanted configuration of fan-shaped interdigital transducers, a delay time difference between two components of the output signal depends on a signal frequency, while a filter delay time is constant. This offers 7-10 dB improvement of a stopband rejection without any frequency response flatness deterioration in the filter passband.<>
Keywords :
band-pass filters; delays; interdigital transducers; surface acoustic wave filters; surface acoustic wave transducers; SAW filter; delay time difference; fan-shaped SAW transducers; filter delay time; filter passband; interdigital transducers; parallel acoustic channels; slanted configuration; stopband rejection; Acoustic beams; Delay effects; Electrodes; Frequency response; Passband; Power harmonic filters; SAW filters; Structural beams; Surface acoustic waves; Transducers;
Conference_Titel :
Microwave Symposium Digest, 1995., IEEE MTT-S International
Conference_Location :
Orlando, FL, USA
Print_ISBN :
0-7803-2581-8
DOI :
10.1109/MWSYM.1995.406301
