REFLECTIVE END FACE TYPE SURFACE WAVE DEVICE

PROBLEM TO BE SOLVED: To provide a reflective end face type surface wave device in which operating frequency can be increased easily and a desired band width can be obtained easily. SOLUTION: In the reflective end face type surface wave device comprising at least one interdigital transducer 3 formed...

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Bibliographic Details
Main Authors KADOTA MICHIO, HASHIMOTO KIYONARI
Format Patent
LanguageEnglish
Published 19.07.2002
Edition7
Subjects
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS
RESONATORS
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Summary:PROBLEM TO BE SOLVED: To provide a reflective end face type surface wave device in which operating frequency can be increased easily and a desired band width can be obtained easily. SOLUTION: In the reflective end face type surface wave device comprising at least one interdigital transducer 3 formed on the major surface 2a of a piezoelectric substrate 2 and using end faces 2c and 2d as reflective end faces, a surface wave principally comprising a longitudinal wave is employed. Assuming the energy intensity of the entire surface wave being excited is 100%, SH wave component and SV wave component other than the longitudinal wave component are preferably 20% or less, respectively. More preferably, the longitudinal wave component is 70% or above assuming the energy intensity of the entire surface wave being excited is 100%.
Bibliography:Application Number: JP20010323307