Surface acoustic wave device with reflected wave at side edges on waveguide suppressed and communication system using the same
US5185548A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 8, 1991 |
| Grant date | Feb 9, 1993 |
| Priority date | — |
| Expiry date | Oct 8, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/6486
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A surface acoustic wave device comprises a substrate, a plurality of input transducers formed on the substrate for generating first and second surface acoustic waves propagating in opposite directions to each other, and a plurality of waveguides arranged in a direction orthogonal to the propagating direction of the first and second surface acoustic waves on a region where the first and second surface acoustic waves overlap. Each waveguide producing a third surface acoustic wave propagating in a direction where the waveguides are arranged, with the interaction between the first and second surface acoustic waves, and on at least two of the waveguides, third surface acoustic waves reflected at respective side edges cancel each other, and an output transducer converts the third surface acoustic waves propagating from the waveguides into an electrical signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.