Elastic wave resonator, elastic wave filter, and antenna sharing device using the same
US8476991B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 9, 2010 |
| Grant date | Jul 2, 2013 |
| Priority date | — |
| Expiry date | Nov 24, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/6496
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An acoustic wave resonance device includes: piezoelectric substrate (1), first acoustic wave resonator (100) provided on an upper surface of piezoelectric substrate (1) and including first interdigital transducer electrode (110), and second acoustic wave resonator (200) provided on piezoelectric substrate (1) and including second interdigital transducer electrode (210). First acoustic wave resonator (100) and second acoustic wave resonator (200) are connected to each other. An overlap width of a plurality of first comb-shaped electrodes (112) forming first acoustic wave resonator (100) is larger than an overlap width of a plurality of second comb-shaped electrodes (212) forming second acoustic wave resonator (200). With such a configuration, frequencies in which a transverse mode spurious response is generated can be distributed and loss can be reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.