Title :
Synthesis of SPUDT filters with simultaneous reflection and transduction optimization
Author :
Ventura, Pascal ; Solal, Marc ; Dufilié, Pierre ; Desbois, Jean ; Doisy, Martine ; Hodé, Jean-Michel
Author_Institution :
Thomson Sintra DTAS, Sophia-Antipolis, France
Abstract :
The general design problem for the single-phase unidirectional transducer (SPUDT) is solved, resulting in a new nonlinear algorithm which computes quasi-optimum transduction and reflection functions for a given template. Load impedance effects are taken into account allowing the placing of constraints on the amplitude and phase of the transducer function as well as on the triple transit level. Several filters are presented showing how SPUDT can be used to design very linear and low triple transit levels or very compact filters for mobile radio applications
Keywords :
acoustic impedance; radiofrequency filters; surface acoustic wave filters; ultrasonic reflection; ultrasonic transducers; SPUDT filter synthesis; compact filters; design problem; load impedance; mobile radio applications; nonlinear algorithm; reflection functions; single-phase unidirectional transducer; transduction optimization; triple transit level; Acoustic reflection; Acoustic transducers; Band pass filters; Bandwidth; Delay; Design optimization; Frequency; Linearity; Transfer functions; Ultrasonic transducers;
Conference_Titel :
Ultrasonics Symposium, 1992. Proceedings., IEEE 1992
Conference_Location :
Tucson, AZ
Print_ISBN :
0-7803-0562-0
DOI :
10.1109/ULTSYM.1992.276061
