Surface acoustic wave scattering grating
US4916348A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 24, 1989 |
| Grant date | Apr 10, 1990 |
| Priority date | — |
| Expiry date | Apr 24, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/02842
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A grating is positioned on a surface acoustic wave device on a first axis in-line with the delay line for substantially reducing the amount of energy reflected on that axis to the transmitter and receiver. The grating site on the first axis at a position between the delay line and one of the edges of the device. The grating is comprised of a parallel series of grating members each oriented so as to extend at a first angle relative to the first axis, the grating members being generally longitudinally bisected by that axis. An optimum value for the first angle is provided by a theoretical analysis, and experimental results are presented. On the experimental device, the grating is defined by a series of parallel grooves formed in the surface of the device; however, the grating may also be defined by a series of metallic strips mounted on the surface of the device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.