Elastic guided wave coupling resonator filter and associated manufacturing
US8610518B1 · kind B1 · utility
7Cited by
10References
37Claims
0Family size
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Key dates
| Filing date | May 18, 2011 |
| Grant date | Dec 17, 2013 |
| Priority date | — |
| Expiry date | Mar 19, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/02228
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An elastic guided acoustic wave coupling resonator filter includes a dielectric layer interposed between piezoelectric substrates, with interdigital transducers on each substrate generally positioned at an interface between the substrates and the dielectric layer. The interdigital transducers on one substrate are aligned with the transducers on the opposing substrate and include cascaded filter tracks. The cascaded orientation between the two filter tracks includes either a differential connection or a balanced connection. As a result, the interdigital transducers are electrically isolated yet acoustically coupled to each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.