SURFACE ACOUSTIC WAVE FILTER

PROBLEM TO BE SOLVED: To provide a surface acoustic wave filter in which low loss and wide- band attenuation characteristics can be obtained. SOLUTION: The filter has a piezoelectric substrate, a pair of reflection electrodes formed on the piezoelectric substrate and a plurality of comb-shaped elect...

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Bibliographic Details
Main Authors KAWAUCHI OSAMU, UEDA MASANORI, TAJIMA MOTOYUKI, ABE TAKUYA, HASHIMOTO KIYONARI
Format Patent
LanguageEnglish
Published 29.08.2003
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 surface acoustic wave filter in which low loss and wide- band attenuation characteristics can be obtained. SOLUTION: The filter has a piezoelectric substrate, a pair of reflection electrodes formed on the piezoelectric substrate and a plurality of comb-shaped electrodes formed on the piezoelectric substrate in front of the pair of reflection electrodes. Concerning two adjacent comb-shaped electrodes in the plurality of comb-shaped electrodes, the electrode pitch of one comb-shaped electrode is set to continuously vary the phase of a surface acoustic wave generated by the two comb-shaped electrodes in the gap from the outermost finger electrode of the other adjacent comb-shaped electrode. COPYRIGHT: (C)2003,JPO
Bibliography:Application Number: JP20020054593