Abstract
The invention of the Natural Single-Phase Unidirectional Transducer (NSPUDT) in 1986 by P.V. Wright opened up a possible new class of low-loss Surface Acoustic Wave (SAW) devices. The unidirectionality of the NSPUDT was obtained by using the crystal asymmetry of the substrate to shift the transduction centers to the edges of the electrodes of the 2-finger/wavelength radiating transducer. Since the unidirectional property is inherent to the substrate orientation, all reported working low-loss SAW transversal filters using NSPUDTs have 4-finger/l bidirectional transducers (BDTs) to receive the acoustic energy. These filters still have an inherent loss of 3 dB. This paper reports a new method to reverse the unidirectionality and the successful fabrication of a low-loss SAW transversal filter using two 2-finger/l transducers of the same metallization and metallization thickness on the NSPUDT orientation of quartz
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
