Surface acoustic wave filter and duplexer using the same
US8410865B2 · kind B2 · utility
1Cited by
4References
6Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 30, 2010 |
| Grant date | Apr 2, 2013 |
| Priority date | — |
| Expiry date | Aug 5, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/725
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A SAW filter includes a piezoelectric body, an IDT electrode on the piezoelectric body, and signal wiring electrically connected to the IDT electrode. The signal wiring has a thickness not less than a skin depth specified based on the frequency of a signal passing through the signal wiring and the electrical conductivity of the signal wiring. As a result, the signal wiring has low propagation loss of the signal passing through it, so that the SAW filter has excellent transmission characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.