Surface acoustic wave device with reflectors
US4353046A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 4, 1980 |
| Grant date | Oct 5, 1982 |
| Priority date | — |
| Expiry date | Nov 4, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/14541
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A surface wave device is disclosed which includes a substrate (12) having a piezoelectric surface (14), an acoustic surface wave transducer (16 and 18) for converting between an electrical signal and acoustic surface waves propagating on the piezoelectric surface and reflective structures (22) which cause reflections of acoustic surface waves in the portion of the piezoelectric surface over which the transducer is disposed. Numerous kinds of reflective structures are disclosed. An acoustic surface wave resonator using the present invention is disclosed, along with bandpass filters with multiple poles. A low-loss transversal filter using the present invention is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.