Title :
Low-loss SAW filter using internal reflection types of single-phase unidirectional transducer
Author :
Yamanouchi, Kazuhiko ; Furuyashiki, H.
Author_Institution :
Tohoku University, Research Institute of Electrical Communication, Sendai, Japan
Abstract :
A new single-phase unidirectional transducer utilising the difference between excitation and reflection positions caused by the change of the electromechanical coupling coefficient within a half or one wavelength is described.
Keywords :
crystal filters; surface acoustic wave devices; ultrasonic transducers; SAW filter; US transducer; electromechanical coupling coefficient; excitation position; internal reflection types; low loss; reflection positions; single-phase unidirectional transducer;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19840557
