Surface acoustic wave device and communication apparatus
US6339704B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 4, 1999 |
| Grant date | Jan 15, 2002 |
| Priority date | — |
| Expiry date | Mar 4, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/0042
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A surface acoustic wave device with an electrode structure that suppresses the deterioration of a withstand voltage against an overvoltage such as a surge voltage or noise applied to a balanced signal terminal is provided. A serial resonator 5 that blocks a voltage is disposed among IDTs 7, 9, 11 and a signal output terminal 3 of the surface acoustic wave device. In addition, a serial resonator 6 is disposed among the IDTs 7, 9, 11, and a signal output terminal 4. The serial resonators 5 and 6 operate as part of IDTs to extract a desired band signal. The structure of the serial resonator 5 should be almost the same as that of the serial resonator 6.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.