Title :
A Bleustein-Gulyaev-Shimizu wave resonator having resonances for TV and VCR traps
Author :
Kadota, M. ; Ago, J. ; Horiuchi, H.
Author_Institution :
Murata Manuf. Co. Ltd., Kyoto, Japan
Abstract :
A Bleustein-Gulyaev-Shimizu (BGS) wave has only a shear horizontal (SH) wave showing a complete reflection at a free edge of a substrate. In this paper, using the responses exited by a weighted interdigital transducer (IDT) and generated by the 2N/spl plusmn/2th mode complete reflections at free edges of a ceramic substrate, we realized a new type of BGS resonator having three resonances without reflector electrodes. This resonator showed sufficient trap attenuations for practical use at both adjacent picture carrier frequency (fap) and adjacent sound carrier frequency (fas) in the TV/VCR VIF (video intermediate frequency) circuit.
Keywords :
crystal resonators; interdigital transducers; video signal processing; BGS resonator; Bleustein-Gulyaev-Shimizu wave resonator; TV traps; VCR traps; VHF filter; adjacent picture carrier frequency; adjacent sound carrier; ceramic substrate; interdigital transducer; piezoelectric device; shear horizontal wave; trap attenuations; video intermediate frequency circuit; weighted IDT; Acoustic reflection; Acoustic transducers; Attenuation; Birth disorders; Ceramics; Electrodes; Financial advantage program; Frequency; Resonance; TV;
Conference_Titel :
Microwave Symposium Digest, 1996., IEEE MTT-S International
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-3246-6
DOI :
10.1109/MWSYM.1996.508753
