Surface acoustic wave filter and communication apparatus with the same

A surface acoustic wave filter, has: a piezoelectric substrate; and a at least two filter tracks having at least an input interdigital transducer electrode and an output interdigital transducer electrode provided on said piezoelectric substrate, wherein the respective input interdigital transducer e...

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Bibliographic Details
Main Authors Yamada, Toru, Nakamura, Hiroyuki, Tsuzuki, Shigeru, Nishimura, Kazunori
Format Patent
LanguageEnglish
Published 16.05.2002
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Summary:A surface acoustic wave filter, has: a piezoelectric substrate; and a at least two filter tracks having at least an input interdigital transducer electrode and an output interdigital transducer electrode provided on said piezoelectric substrate, wherein the respective input interdigital transducer electrodes of said at least two filter tracks are brought into connection in parallel; the respective output interdigital transducer electrodes of said at least two filter tracks are brought into connection in parallel, and overlapping widths of electrode fingers of said input interdigital transducer electrode and output interdigital transducer electrode are different from each other for each of said at least two filter tracks.